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From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN>
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Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance
Date: Fri, 21 Aug 2020 13:32:14 +0200
In-Reply-To: <87tuwxwjkr.fsf@HIDDEN>
To: Lars Ingebrigtsen <larsi@HIDDEN>
References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN>
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Cc: Eli Zaretskii <eliz@HIDDEN>, 41544 <at> debbugs.gnu.org
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20 aug. 2020 kl. 15.08 skrev Lars Ingebrigtsen <larsi@HIDDEN>:
> Mattias?
I don't want to revive this discussion and consider the matter settled, =
but since you asked:
Suppose we add standard-colour-darkness-predicate, say, with =
color-dark-p being the default and (r+b+g)/3<0.6 the 'traditional' =
option (or the default, if you prefer). How would the effects of that =
choice be explained to the user?
A difference is only visible when:
1. a face sensitive to the background mode is used (many standard faces =
are), and
2. a background colour used that is judged differently by the available =
predicates
Most reasonable backgrounds are either too light or too dark to pass the =
latter criterion, but people's idea of what is reasonable varies. For =
instance, black-on-green text is somewhat readable, but
emacs -bg green -fg black
will give mostly bad default faces (for instance, the minibuffer prompt =
is almost invisible). With color-dark-p it becomes workable (attached =
diff).
Whether this is reason enough to add a defcustom is something I won't =
comment on. I doubt anyone will change it, whatever the default would =
be.
--Apple-Mail=_277FAD2E-6E8F-4BDC-B57C-7B32ADD3A2E0
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diff --git a/lisp/frame.el b/lisp/frame.el
index 081d3010e9..75e7f74209 100644
--- a/lisp/frame.el
+++ b/lisp/frame.el
@@ -1198,13 +1198,10 @@ frame-set-background-mode
non-default-bg-mode)
((not (color-values bg-color frame))
default-bg-mode)
- ((>= (apply '+ (color-values bg-color frame))
- ;; Just looking at the screen, colors whose
- ;; values add up to .6 of the white total
- ;; still look dark to me.
- (* (apply '+ (color-values "white" frame)) .6))
- 'light)
- (t 'dark)))
+ ((color-dark-p (mapcar (lambda (c) (/ c 65535.0))
+ (color-values bg-color frame)))
+ 'dark)
+ (t 'light)))
(display-type
(cond ((null (window-system frame))
(if (tty-display-color-p frame) 'color 'mono))
diff --git a/lisp/term/rxvt.el b/lisp/term/rxvt.el
index 31e3d6ede4..793512105a 100644
--- a/lisp/term/rxvt.el
+++ b/lisp/term/rxvt.el
@@ -208,10 +208,7 @@ rxvt-set-background-mode
(setq rgb (car (cddr (nth bg rxvt-standard-colors))))
;; See the commentary in frame-set-background-mode about the
;; computation below.
- (if (< (apply '+ rgb)
- ;; The following line assumes that white is the 15th
- ;; color in rxvt-standard-colors.
- (* (apply '+ (car (cddr (nth 15 rxvt-standard-colors)))) 0.6))
+ (if (color-dark-p (mapcar (lambda (c) (/ c 255.0)) rgb))
(set-terminal-parameter nil 'background-mode 'dark)))))
(provide 'term/rxvt)
diff --git a/lisp/term/w32console.el b/lisp/term/w32console.el
index 36e9d896c7..66680af44b 100644
--- a/lisp/term/w32console.el
+++ b/lisp/term/w32console.el
@@ -86,7 +86,7 @@ terminal-init-w32console
(setq r (nth 2 descr)
g (nth 3 descr)
b (nth 4 descr))
- (if (< (+ r g b) (* .6 (+ 65535 65535 65535)))
+ (if (color-dark-p (mapcar (lambda (c) (/ c 65535.0)) (list r g b)))
(setq bg-mode 'dark)
(setq bg-mode 'light))
(set-terminal-parameter nil 'background-mode bg-mode))
diff --git a/lisp/term/xterm.el b/lisp/term/xterm.el
index 1a727e3933..d71297d811 100644
--- a/lisp/term/xterm.el
+++ b/lisp/term/xterm.el
@@ -1122,7 +1122,8 @@ xterm-register-default-colors
(defun xterm-maybe-set-dark-background-mode (redc greenc bluec)
;; Use the heuristic in `frame-set-background-mode' to decide if a
;; frame is dark.
- (when (< (+ redc greenc bluec) (* .6 (+ 65535 65535 65535)))
+ (when (color-dark-p (mapcar (lambda (c) (/ c 65535.0))
+ (list redc greenc bluec)))
(set-terminal-parameter nil 'background-mode 'dark)
t))
--Apple-Mail=_277FAD2E-6E8F-4BDC-B57C-7B32ADD3A2E0--
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 20 Aug 2020 13:09:04 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu Aug 20 09:09:04 2020 Received: from localhost ([127.0.0.1]:41918 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1k8kJU-00042X-8f for submit <at> debbugs.gnu.org; Thu, 20 Aug 2020 09:09:04 -0400 Received: from quimby.gnus.org ([95.216.78.240]:57090) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <larsi@HIDDEN>) id 1k8kJS-000424-O5 for 41544 <at> debbugs.gnu.org; Thu, 20 Aug 2020 09:09:03 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=RgB2vYzkbsI3l2RHctZ+CApjPJl7Eq7gai6kYmJjWMg=; b=j9sV6rA3OAcamJe9DMe8WAEvqt vPaGtbZ8i3yevQbTb9ZsO7cpfJCXVa5fy87kXiZc5OKB6FmpTt7LTsuO6OrlzFvv8d8ioLncDw+tZ WzG6zOrkzmQVgRW+/JeZePm10+eki8BM54AYxy0eOrzeGEIPjgFE/6GtR4c1fQlGZ3sA=; Received: from cm-84.212.202.86.getinternet.no ([84.212.202.86] helo=xo) by quimby with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from <larsi@HIDDEN>) id 1k8kJJ-0003cy-Pn; Thu, 20 Aug 2020 15:08:56 +0200 From: Lars Ingebrigtsen <larsi@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <1B0F31C8-1E11-4527-A053-DD2DE8235F58@HIDDEN> <83wo4g5hz6.fsf@HIDDEN> <49B7D7B5-D9E3-4E97-A749-CF5E8D8EE2C6@HIDDEN> <83mu5b5573.fsf@HIDDEN> <A829B1D4-5072-469D-A689-D448BA21176C@HIDDEN> <83lfku69q2.fsf@HIDDEN> <87eeo4m5kd.fsf@HIDDEN> <83d03of3pf.fsf@HIDDEN> <87blj8kpsr.fsf@HIDDEN> <838secf1mq.fsf@HIDDEN> <87zh6r7xlf.fsf@HIDDEN> <837dtuelhr.fsf@HIDDEN> <87sgciznhy.fsf@HIDDEN> <83sgcid0ap.fsf@HIDDEN> Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwBAMAAAClLOS0AAAABGdBTUEAALGPC/xhBQAAACBj SFJNAAB6JgAAgIQAAPoAAACA6AAAdTAAAOpgAAA6mAAAF3CculE8AAAAGFBMVEX8/PzS0dDAv7+k o6JkYmAoJSOCgH3///+94UAcAAAAAWJLR0QHFmGI6wAAAAd0SU1FB+QIFA0DKyFDQe0AAAG0SURB VDjLhZRNd6sgEIYHMXuQZG+07qnYrslhvOsYYd9zev//b7gDmDal5tx3oQzPfMmHAMDgLtbPJmrs WgBljEizTZyRHYlGlryYTIBNiOacRsZMBJQyven7CJt3DB7NnzNwAiBBSkl1+IQBHeUnnwQexBoz zQHR8isZMkncoUInbRVBI2XXfIFmBPVqGYFKSkLyDBW1hSF4IzJ4LNFj0Ey59gOK4llGaLjszFee HnsAInjdxvIRvJN5B+PPmDct98HgxT4Yh9su4DeGABSkCzAvcVepY/sTHNdkujKiCjqZLyWol2zW ogBcbED/Kp7Nyj4BcGFPgHkGjs9AXdaoN5PrjwLYbLJLmWrt8tuV4LTt+KkEfEmv7mDLrjBn4jfx CBgoykG6VbOnAb8fJYZhvCaATEQ7fG3Iy9WlffFbDzYH9IIvQ2whTCI7koOa0I10tw4xt6/bHPKm B+/x0yAe41WrLUe6esacj2u9bosil7hkJNl03RQczDoDvabDkKSQDvIhfbMKeqJ9Sq2ovy73LOhP EC5wAph6Q5fPbed+uPLZt6mAoh+I+F6/EJILh1LYwn/0D01PRr3IrfFcAAAAJXRFWHRkYXRlOmNy ZWF0ZQAyMDIwLTA4LTIwVDEzOjAzOjQzKzAwOjAwr1HJbAAAACV0RVh0ZGF0ZTptb2RpZnkAMjAy MC0wOC0yMFQxMzowMzo0MyswMDowMN4McdAAAAAASUVORK5CYII= X-Now-Playing: Various's _SHAPE Platform 2019_: "Tim Shaw - Three Different Sized Vessels" Date: Thu, 20 Aug 2020 15:08:52 +0200 In-Reply-To: <83sgcid0ap.fsf@HIDDEN> (Eli Zaretskii's message of "Wed, 19 Aug 2020 20:15:42 +0300") Message-ID: <87tuwxwjkr.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Report: Spam detection software, running on the system "quimby.gnus.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Eli Zaretskii <eliz@HIDDEN> writes: > So you propose to explain that the alternatives change what colors > Emacs considers "dark" and "light" when it needs to decide which > colors will contrast well enough, and let people experiment wi [...] Content analysis details: (-2.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 41544 Cc: simenheg@HIDDEN, mattiase@HIDDEN, tom@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) Eli Zaretskii <eliz@HIDDEN> writes: > So you propose to explain that the alternatives change what colors > Emacs considers "dark" and "light" when it needs to decide which > colors will contrast well enough, and let people experiment with these > two alternatives to their taste? I'm not sure, but maybe that could > be useful to someone. I think so. Mattias? -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 19 Aug 2020 17:16:05 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Aug 19 13:16:05 2020 Received: from localhost ([127.0.0.1]:40896 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1k8Rgv-0002QP-Dh for submit <at> debbugs.gnu.org; Wed, 19 Aug 2020 13:16:05 -0400 Received: from eggs.gnu.org ([209.51.188.92]:59994) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1k8Rgu-0002LU-8K for 41544 <at> debbugs.gnu.org; Wed, 19 Aug 2020 13:16:00 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:53132) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1k8Rgm-0000bv-MO; Wed, 19 Aug 2020 13:15:52 -0400 Received: from [176.228.60.248] (port=2867 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1k8Rgl-0006eN-MB; Wed, 19 Aug 2020 13:15:52 -0400 Date: Wed, 19 Aug 2020 20:15:42 +0300 Message-Id: <83sgcid0ap.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Lars Ingebrigtsen <larsi@HIDDEN> In-Reply-To: <87sgciznhy.fsf@HIDDEN> (message from Lars Ingebrigtsen on Wed, 19 Aug 2020 17:03:37 +0200) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <1B0F31C8-1E11-4527-A053-DD2DE8235F58@HIDDEN> <83wo4g5hz6.fsf@HIDDEN> <49B7D7B5-D9E3-4E97-A749-CF5E8D8EE2C6@HIDDEN> <83mu5b5573.fsf@HIDDEN> <A829B1D4-5072-469D-A689-D448BA21176C@HIDDEN> <83lfku69q2.fsf@HIDDEN> <87eeo4m5kd.fsf@HIDDEN> <83d03of3pf.fsf@HIDDEN> <87blj8kpsr.fsf@HIDDEN> <838secf1mq.fsf@HIDDEN> <87zh6r7xlf.fsf@HIDDEN> <837dtuelhr.fsf@HIDDEN> <87sgciznhy.fsf@HIDDEN> X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 41544 Cc: simenheg@HIDDEN, mattiase@HIDDEN, tom@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > From: Lars Ingebrigtsen <larsi@HIDDEN> > Cc: mattiase@HIDDEN, simenheg@HIDDEN, tom@HIDDEN, > 41544 <at> debbugs.gnu.org > Date: Wed, 19 Aug 2020 17:03:37 +0200 > > Eli Zaretskii <eliz@HIDDEN> writes: > > >> It's probably say "If non-nil, use old-style computation". > > > > Is that a useful doc string? > > It would then go on to discuss the differences in the two approaches. I > thought you wanted only the first line. So you propose to explain that the alternatives change what colors Emacs considers "dark" and "light" when it needs to decide which colors will contrast well enough, and let people experiment with these two alternatives to their taste? I'm not sure, but maybe that could be useful to someone.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 19 Aug 2020 15:04:07 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Aug 19 11:04:07 2020 Received: from localhost ([127.0.0.1]:40730 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1k8PdH-0006o7-1e for submit <at> debbugs.gnu.org; Wed, 19 Aug 2020 11:04:07 -0400 Received: from quimby.gnus.org ([95.216.78.240]:46284) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <larsi@HIDDEN>) id 1k8Pd2-0006n0-3Q for 41544 <at> debbugs.gnu.org; Wed, 19 Aug 2020 11:04:05 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=5U9l5uyDPgKTkHEMO0bO/Cdt7SOu5AO/vFFzbqUj49I=; b=cjv7aGXY8rUoVwDPfuyw8zPfft 1F2ikSrRcRYrco4NDwSvieR1sq0YFzDZsWo8+33zrXPfbkeLZNdBD0SjGVBI1bWNWMJLc8IAH37+P kUzs5Raer1TNR/F0vbZWdSnud3zGtBsqwQbIQJkmY5ll2nEsElVSwgutUc5rl3fdbMxg=; Received: from cm-84.212.202.86.getinternet.no ([84.212.202.86] helo=xo) by quimby with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from <larsi@HIDDEN>) id 1k8Pco-00065o-PU; Wed, 19 Aug 2020 17:03:45 +0200 From: Lars Ingebrigtsen <larsi@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <1B0F31C8-1E11-4527-A053-DD2DE8235F58@HIDDEN> <83wo4g5hz6.fsf@HIDDEN> <49B7D7B5-D9E3-4E97-A749-CF5E8D8EE2C6@HIDDEN> <83mu5b5573.fsf@HIDDEN> <A829B1D4-5072-469D-A689-D448BA21176C@HIDDEN> <83lfku69q2.fsf@HIDDEN> <87eeo4m5kd.fsf@HIDDEN> <83d03of3pf.fsf@HIDDEN> <87blj8kpsr.fsf@HIDDEN> <838secf1mq.fsf@HIDDEN> <87zh6r7xlf.fsf@HIDDEN> <837dtuelhr.fsf@HIDDEN> X-Now-Playing: Le =?utf-8?B?TXlzdMODwqhyZQ==?= des Voix Bulgares's _Volume 2_: "Messetchinko Lio" Date: Wed, 19 Aug 2020 17:03:37 +0200 In-Reply-To: <837dtuelhr.fsf@HIDDEN> (Eli Zaretskii's message of "Wed, 19 Aug 2020 17:52:32 +0300") Message-ID: <87sgciznhy.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Report: Spam detection software, running on the system "quimby.gnus.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Eli Zaretskii <eliz@HIDDEN> writes: >> It's probably say "If non-nil, use old-style computation". > > Is that a useful doc string? It would then go on to discuss the differences in the two approaches. I thought you wanted only the first line. Content analysis details: (-2.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 41544 Cc: simenheg@HIDDEN, mattiase@HIDDEN, tom@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) Eli Zaretskii <eliz@HIDDEN> writes: >> It's probably say "If non-nil, use old-style computation". > > Is that a useful doc string? It would then go on to discuss the differences in the two approaches. I thought you wanted only the first line. -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 19 Aug 2020 14:52:57 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Aug 19 10:52:57 2020 Received: from localhost ([127.0.0.1]:40717 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1k8PSP-0006Vb-GQ for submit <at> debbugs.gnu.org; Wed, 19 Aug 2020 10:52:57 -0400 Received: from eggs.gnu.org ([209.51.188.92]:43674) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1k8PSK-0006VJ-Do for 41544 <at> debbugs.gnu.org; Wed, 19 Aug 2020 10:52:51 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:49597) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1k8PSD-0004JE-Oy; Wed, 19 Aug 2020 10:52:41 -0400 Received: from [176.228.60.248] (port=2059 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1k8PSD-0008Ti-5G; Wed, 19 Aug 2020 10:52:41 -0400 Date: Wed, 19 Aug 2020 17:52:32 +0300 Message-Id: <837dtuelhr.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Lars Ingebrigtsen <larsi@HIDDEN> In-Reply-To: <87zh6r7xlf.fsf@HIDDEN> (message from Lars Ingebrigtsen on Wed, 19 Aug 2020 12:13:00 +0200) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <1B0F31C8-1E11-4527-A053-DD2DE8235F58@HIDDEN> <83wo4g5hz6.fsf@HIDDEN> <49B7D7B5-D9E3-4E97-A749-CF5E8D8EE2C6@HIDDEN> <83mu5b5573.fsf@HIDDEN> <A829B1D4-5072-469D-A689-D448BA21176C@HIDDEN> <83lfku69q2.fsf@HIDDEN> <87eeo4m5kd.fsf@HIDDEN> <83d03of3pf.fsf@HIDDEN> <87blj8kpsr.fsf@HIDDEN> <838secf1mq.fsf@HIDDEN> <87zh6r7xlf.fsf@HIDDEN> X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 41544 Cc: simenheg@HIDDEN, mattiase@HIDDEN, tom@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > From: Lars Ingebrigtsen <larsi@HIDDEN> > Cc: mattiase@HIDDEN, simenheg@HIDDEN, tom@HIDDEN, > 41544 <at> debbugs.gnu.org > Date: Wed, 19 Aug 2020 12:13:00 +0200 > > Eli Zaretskii <eliz@HIDDEN> writes: > > > I think it is. Think about what you'd say in the doc string of such a > > defcustom. "If non-nil, handle colors correctly, otherwise handle > > them incorrectly"? > > It's probably say "If non-nil, use old-style computation". Is that a useful doc string?
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
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From: Lars Ingebrigtsen <larsi@HIDDEN>
To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN>
Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance
References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN>
<3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN>
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<A829B1D4-5072-469D-A689-D448BA21176C@HIDDEN>
<83lfku69q2.fsf@HIDDEN> <87eeo4m5kd.fsf@HIDDEN>
<83d03of3pf.fsf@HIDDEN> <87blj8kpsr.fsf@HIDDEN>
<8DE1C96A-9DE1-490D-BA13-21BFD6761788@HIDDEN>
<874koz9c7k.fsf@HIDDEN>
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X-Now-Playing: Dead Can Dance's _Within the Realm of a Dying Sun_: "Xavier"
Date: Wed, 19 Aug 2020 13:34:23 +0200
In-Reply-To: <D803C0B7-F2E1-4B7E-A7DC-4965A5B1A583@HIDDEN> ("Mattias
=?utf-8?Q?Engdeg=C3=A5rd=22's?= message of "Wed, 19 Aug 2020 13:28:52
+0200")
Message-ID: <87v9he6f9c.fsf@HIDDEN>
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Content preview: Mattias Engdegård <mattiase@HIDDEN> writes: > Technically
yes, but is there is a reason for users to adjust this > particular behaviour?
Users dissatisfied with the outcome of the > existing algorithms typically
curse and set colours explicitly [...]
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Mattias Engdeg=C3=A5rd <mattiase@HIDDEN> writes:
> Technically yes, but is there is a reason for users to adjust this
> particular behaviour? Users dissatisfied with the outcome of the
> existing algorithms typically curse and set colours explicitly (or
> suffer in silence); they are unlikely to set a 'use different
> algorithm' variable.
Well, adding this variable would allow us to experiment with defaulting
it to `new-style' during Emacs 28 and see whether there's any immediate
fallout, and allow switching between the two to see what the effect is
(on various systems).
As Eli points out, these things can be finicky.
--=20
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 19 Aug 2020 11:29:36 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Aug 19 07:29:36 2020 Received: from localhost ([127.0.0.1]:38218 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1k8MHg-0003w7-Iz for submit <at> debbugs.gnu.org; Wed, 19 Aug 2020 07:29:36 -0400 Received: from mail154c50.megamailservers.eu ([91.136.10.164]:52740 helo=mail50c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <mattiase@HIDDEN>) id 1k8MHc-0003vs-Lm for 41544 <at> debbugs.gnu.org; Wed, 19 Aug 2020 07:29:35 -0400 X-Authenticated-User: mattiase@HIDDEN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1597836570; bh=XYeYXKn4SeclTjj/3amood8P8Lsq+Mch3ga39ykzfgI=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=GHfuyo+5BH+MvQ2UWGhicA9jJSsNOuDc5CrmetrOEhqLqCngEkSSP0L5ee/Ekxuc1 TZyRVmtBRm9/DKDMzHwv2OATbkMbLkPAEAAupfmDeGY2JSHW/UeUYPGgEpYLP8f/Bs dxd2GFLFTmBcGGY7VDaDNeEAUq9ZlWN1a7vJVeOk= Feedback-ID: mattiase@HIDDEN Received: from [192.168.0.4] (c188-150-171-71.bredband.comhem.se [188.150.171.71]) (authenticated bits=0) by mail50c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 07JBTPe5016616; Wed, 19 Aug 2020 11:29:29 +0000 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.15\)) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <874koz9c7k.fsf@HIDDEN> Date: Wed, 19 Aug 2020 13:28:52 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <D803C0B7-F2E1-4B7E-A7DC-4965A5B1A583@HIDDEN> References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <1B0F31C8-1E11-4527-A053-DD2DE8235F58@HIDDEN> <83wo4g5hz6.fsf@HIDDEN> <49B7D7B5-D9E3-4E97-A749-CF5E8D8EE2C6@HIDDEN> <83mu5b5573.fsf@HIDDEN> <A829B1D4-5072-469D-A689-D448BA21176C@HIDDEN> <83lfku69q2.fsf@HIDDEN> <87eeo4m5kd.fsf@HIDDEN> <83d03of3pf.fsf@HIDDEN> <87blj8kpsr.fsf@HIDDEN> <8DE1C96A-9DE1-490D-BA13-21BFD6761788@HIDDEN> <874koz9c7k.fsf@HIDDEN> To: Lars Ingebrigtsen <larsi@HIDDEN> X-Mailer: Apple Mail (2.3445.104.15) X-CTCH-RefID: str=0001.0A782F22.5F3D0D1A.0043, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: 0.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=NoevjPVJ c=1 sm=1 tr=0 a=SF+I6pRkHZhrawxbOkkvaA==:117 a=SF+I6pRkHZhrawxbOkkvaA==:17 a=kj9zAlcOel0A:10 a=M51BFTxLslgA:10 a=OocQHUDgAAAA:8 a=LUUatbi7KA7-G3vn9BgA:9 a=CjuIK1q_8ugA:10 a=xUZTl98r3Qw_uB5NK3jt:22 X-Origin-Country: SE X-Spam-Score: 1.4 (+) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: [CC list trimmed] 19 aug. 2020 kl. 12.11 skrev Lars Ingebrigtsen <larsi@HIDDEN>: > I'm not quite sure I follow you here, but could these other computations > also be fixed, with a defcustom to switched between the two computation > methods? Content analysis details: (1.4 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.4 KHOP_HELO_FCRDNS Relay HELO differs from its IP's reverse DNS X-Debbugs-Envelope-To: 41544 Cc: Eli Zaretskii <eliz@HIDDEN>, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.0 (/) [CC list trimmed] 19 aug. 2020 kl. 12.11 skrev Lars Ingebrigtsen <larsi@HIDDEN>: > I'm not quite sure I follow you here, but could these other = computations > also be fixed, with a defcustom to switched between the two = computation > methods? Technically yes, but is there is a reason for users to adjust this = particular behaviour? Users dissatisfied with the outcome of the = existing algorithms typically curse and set colours explicitly (or = suffer in silence); they are unlikely to set a 'use different algorithm' = variable. To be precise, the computations I suppose we are talking about are = located in: frame-set-background-mode (frame.el:1184) xterm-maybe-set-dark-background-mode (xterm.el:1122) rxvt-set-background-mode (rxvt.el:198) terminal-init-w32console (w32console.el:89) which all use the predicate (r+g+b)/3 < 0.6 to determine if a colour is = dark. It is also mentioned in a comment in pc-win.el:57. I believe it to be suboptimal but have no plans to do anything about it.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 19 Aug 2020 10:13:12 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Aug 19 06:13:12 2020 Received: from localhost ([127.0.0.1]:37942 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1k8L5k-0005gx-2C for submit <at> debbugs.gnu.org; Wed, 19 Aug 2020 06:13:12 -0400 Received: from quimby.gnus.org ([95.216.78.240]:42878) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <larsi@HIDDEN>) id 1k8L5i-0005gk-Jd for 41544 <at> debbugs.gnu.org; Wed, 19 Aug 2020 06:13:11 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=Z1b8dztGuMPvVisiOFlAYrv3VfJoIcCVIeFkjDGIVvQ=; b=VLcCLHG4aJnfmrfQIziF9l6LVT fsanXFpMu6rV29RAW2zPOxjllN6Z7hMYt+UxfBEbCUjXl81LvAQYF/rlWbWi+tse6oh2MuL5z7Pep lZSsSaKfaPuTRBUZhREZcdXqVSh1fg6XpiVgamaMlhwaZF2Q/U555wQl70NkioYdyDEE=; Received: from cm-84.212.202.86.getinternet.no ([84.212.202.86] helo=xo) by quimby with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from <larsi@HIDDEN>) id 1k8L5a-0003NG-0z; Wed, 19 Aug 2020 12:13:04 +0200 From: Lars Ingebrigtsen <larsi@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <1B0F31C8-1E11-4527-A053-DD2DE8235F58@HIDDEN> <83wo4g5hz6.fsf@HIDDEN> <49B7D7B5-D9E3-4E97-A749-CF5E8D8EE2C6@HIDDEN> <83mu5b5573.fsf@HIDDEN> <A829B1D4-5072-469D-A689-D448BA21176C@HIDDEN> <83lfku69q2.fsf@HIDDEN> <87eeo4m5kd.fsf@HIDDEN> <83d03of3pf.fsf@HIDDEN> <87blj8kpsr.fsf@HIDDEN> <838secf1mq.fsf@HIDDEN> Face: iVBORw0KGgoAAAANSUhEUgAAADAAAAAwBAMAAAClLOS0AAAABGdBTUEAALGPC/xhBQAAACBj SFJNAAB6JgAAgIQAAPoAAACA6AAAdTAAAOpgAAA6mAAAF3CculE8AAAAGFBMVEUbFRZeNzKmUjr9 +cj06rLRsYfMm23////T9WBdAAAAAWJLR0QHFmGI6wAAAAd0SU1FB+QIEwoKM3t1TM4AAAGfSURB VDjLrZPBktowDIZjniDSdjhjTeHcYoczYJtzlwSfqUny/o+wcthNlLCXzlQz8Tj+LMv6JRfFl6ni Hwyepj+/cgRvZmZHARz/W/M5HBce1n3jMZlbgoqItu7V44CIAFi/AI1ESIBuAc6KTyKNgM0CAKWU SEO5qiWwAINHTn1tThPYK0WJeJmlhIcAJyhxcMB7PwNnBJVlxMe1QxmDAUuqaB05Ui3AAWjQ/Wff JtoJUHEGoLROjyq2UYCQNCfeE7aHm7vIBLOElPrYB1+H01jCN3trbnFrD+3t4rz/LTJ3NnStCU3V cQHm9cg1ddayhubPSwWt97mCv74Dy3o8GyG0Q6ecXmK8b4cNMxCCM7ZaWe+8Edc1Vfd3zXu3HMVG EKDcAdRDeHsGAfarDYN8vveEegLHdVmsnHEcxxPdJ3CnQsEj92e4Im0kALXzWZPuHUkcdaVILcvX 2KQVCHDpXM4jNibEOWg4LjtkQTaFuG7lsyJhEGwvwfiYco6lzFxaNYEfXpqb1FUlZH/IM+7qcgLP zuWnz7NpecTj8J/tAzQFeIl0nVBIAAAAJXRFWHRkYXRlOmNyZWF0ZQAyMDIwLTA4LTE5VDEwOjEw OjUxKzAwOjAw7faFjAAAACV0RVh0ZGF0ZTptb2RpZnkAMjAyMC0wOC0xOVQxMDoxMDo1MSswMDow MJyrPTAAAAAASUVORK5CYII= X-Now-Playing: The Wolfgang Press's _Big Sex_: "That Heat" Date: Wed, 19 Aug 2020 12:13:00 +0200 In-Reply-To: <838secf1mq.fsf@HIDDEN> (Eli Zaretskii's message of "Tue, 18 Aug 2020 17:51:41 +0300") Message-ID: <87zh6r7xlf.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Report: Spam detection software, running on the system "quimby.gnus.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Eli Zaretskii <eliz@HIDDEN> writes: > I think it is. Think about what you'd say in the doc string of such a > defcustom. "If non-nil, handle colors correctly, otherwise handle > them incorrectly"? It's probably say "If non-nil, use old-style computation". 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Think about what you'd say in the doc string of such a > defcustom. "If non-nil, handle colors correctly, otherwise handle > them incorrectly"? It's probably say "If non-nil, use old-style computation". -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
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From: Lars Ingebrigtsen <larsi@HIDDEN>
To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN>
Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance
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X-Now-Playing: The Wolfgang Press's _Big Sex_: "That Heat"
Date: Wed, 19 Aug 2020 12:11:59 +0200
In-Reply-To: <8DE1C96A-9DE1-490D-BA13-21BFD6761788@HIDDEN> ("Mattias
=?utf-8?Q?Engdeg=C3=A5rd=22's?= message of "Tue, 18 Aug 2020 16:19:18
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Content preview: Mattias Engdegård <mattiase@HIDDEN> writes: > 18 aug. 2020
kl. 16.10 skrev Lars Ingebrigtsen <larsi@HIDDEN>: > >> My impression was
that only a few bug fixes were done, but the rest of >> the colour computation
was not applied? That may be wr [...]
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Cc: simenheg@HIDDEN, Eli Zaretskii <eliz@HIDDEN>, tom@HIDDEN,
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Mattias Engdeg=C3=A5rd <mattiase@HIDDEN> writes:
> 18 aug. 2020 kl. 16.10 skrev Lars Ingebrigtsen <larsi@HIDDEN>:
>
>> My impression was that only a few bug fixes were done, but the rest of
>> the colour computation was not applied? That may be wrong -- Mattias?
>
> In the end, the only affected code was css-mode and
> list-colors-display. 'color-dark-p' was made available for code that
> want to use the same mechanism. Other contrasting-colour computations
> were left unchanged.
I'm not quite sure I follow you here, but could these other computations
also be fixed, with a defcustom to switched between the two computation
methods?
--=20
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 18 Aug 2020 14:52:06 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Tue Aug 18 10:52:06 2020 Received: from localhost ([127.0.0.1]:36641 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1k82y1-0005FT-W9 for submit <at> debbugs.gnu.org; Tue, 18 Aug 2020 10:52:06 -0400 Received: from eggs.gnu.org ([209.51.188.92]:33342) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1k82y0-0005Ex-8j for 41544 <at> debbugs.gnu.org; Tue, 18 Aug 2020 10:52:00 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:53184) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1k82xt-0004Z1-QS; Tue, 18 Aug 2020 10:51:53 -0400 Received: from [176.228.60.248] (port=1236 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1k82xt-0002pq-8e; Tue, 18 Aug 2020 10:51:53 -0400 Date: Tue, 18 Aug 2020 17:51:41 +0300 Message-Id: <838secf1mq.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Lars Ingebrigtsen <larsi@HIDDEN> In-Reply-To: <87blj8kpsr.fsf@HIDDEN> (message from Lars Ingebrigtsen on Tue, 18 Aug 2020 16:10:44 +0200) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <1B0F31C8-1E11-4527-A053-DD2DE8235F58@HIDDEN> <83wo4g5hz6.fsf@HIDDEN> <49B7D7B5-D9E3-4E97-A749-CF5E8D8EE2C6@HIDDEN> <83mu5b5573.fsf@HIDDEN> <A829B1D4-5072-469D-A689-D448BA21176C@HIDDEN> <83lfku69q2.fsf@HIDDEN> <87eeo4m5kd.fsf@HIDDEN> <83d03of3pf.fsf@HIDDEN> <87blj8kpsr.fsf@HIDDEN> X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 41544 Cc: simenheg@HIDDEN, mattiase@HIDDEN, tom@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) > From: Lars Ingebrigtsen <larsi@HIDDEN> > Cc: mattiase@HIDDEN, simenheg@HIDDEN, tom@HIDDEN, > 41544 <at> debbugs.gnu.org > Date: Tue, 18 Aug 2020 16:10:44 +0200 > > Eli Zaretskii <eliz@HIDDEN> writes: > > > How do they make things better, and what things, exactly? My > > recollection is that this was about consistency, not correctness. > > According to the screen shots, they compute correct colours (based on > fixing the luminance formulas, if I remember correctly (it's been a > couple weeks since I read this thread)). My bitter experience with handling colors in Emacs is that changes frequently fix some use cases and botch others. So I'd prefer to make such changes only where the current results are completely unacceptable (and I'd be surprised if we have such cases nowadays). > > I don't think defcustom is the proper way of handling differences in > > behavior at this low level. > > Different ways of computing colours? That's not very low level. I think it is. Think about what you'd say in the doc string of such a defcustom. "If non-nil, handle colors correctly, otherwise handle them incorrectly"?
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 18 Aug 2020 14:19:31 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Tue Aug 18 10:19:31 2020 Received: from localhost ([127.0.0.1]:36587 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1k82SZ-0004R6-Ec for submit <at> debbugs.gnu.org; Tue, 18 Aug 2020 10:19:31 -0400 Received: from mail1446c50.megamailservers.eu ([91.136.14.46]:42246 helo=mail265c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <mattiase@HIDDEN>) id 1k82SW-0004Qr-JI for 41544 <at> debbugs.gnu.org; Tue, 18 Aug 2020 10:19:29 -0400 X-Authenticated-User: mattiase@HIDDEN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1597760361; bh=fcD3Fa+Mw76y+oAsLYdNFXnJdcWW2PnnYTxjIiiQHxU=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=n21Pr7ehKzDQzgbrsp6Stl8nlZwfdMOIxK6Qhc9quqQRLBTQB3CJHfpGzoQHK77Oe eGqOobo5wmn4wOd3R4+jxHpAcpc8bZSfLg9RsaXFf9rJ9EEXuOAX0ihaL2i2AxfWMZ PjkaxDuNQQwBZ7PelGM7HqicVu8w4SWrj1SIQyEQ= Feedback-ID: mattiase@HIDDEN Received: from [192.168.0.4] (c188-150-171-71.bredband.comhem.se [188.150.171.71]) (authenticated bits=0) by mail265c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 07IEJInB010923; Tue, 18 Aug 2020 14:19:20 +0000 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.15\)) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <87blj8kpsr.fsf@HIDDEN> Date: Tue, 18 Aug 2020 16:19:18 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <8DE1C96A-9DE1-490D-BA13-21BFD6761788@HIDDEN> References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <1B0F31C8-1E11-4527-A053-DD2DE8235F58@HIDDEN> <83wo4g5hz6.fsf@HIDDEN> <49B7D7B5-D9E3-4E97-A749-CF5E8D8EE2C6@HIDDEN> <83mu5b5573.fsf@HIDDEN> <A829B1D4-5072-469D-A689-D448BA21176C@HIDDEN> <83lfku69q2.fsf@HIDDEN> <87eeo4m5kd.fsf@HIDDEN> <83d03of3pf.fsf@HIDDEN> <87blj8kpsr.fsf@HIDDEN> To: Lars Ingebrigtsen <larsi@HIDDEN> X-Mailer: Apple Mail (2.3445.104.15) X-CTCH-RefID: str=0001.0A782F29.5F3BE369.009D, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: 0.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=D5w51cZj c=1 sm=1 tr=0 a=SF+I6pRkHZhrawxbOkkvaA==:117 a=SF+I6pRkHZhrawxbOkkvaA==:17 a=kj9zAlcOel0A:10 a=M51BFTxLslgA:10 a=OocQHUDgAAAA:8 a=TisEoJga-hbO4ijymiAA:9 a=CjuIK1q_8ugA:10 a=xUZTl98r3Qw_uB5NK3jt:22 X-Origin-Country: SE X-Spam-Score: 1.4 (+) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: 18 aug. 2020 kl. 16.10 skrev Lars Ingebrigtsen <larsi@HIDDEN>: > My impression was that only a few bug fixes were done, but the rest of > the colour computation was not applied? That may be wrong -- Mattias? 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That may be wrong -- Mattias? In the end, the only affected code was css-mode and list-colors-display. = 'color-dark-p' was made available for code that want to use the same = mechanism. Other contrasting-colour computations were left unchanged.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
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The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Eli Zaretskii <eliz@HIDDEN> writes: > How do they make things better, and what things, exactly? My > recollection is that this was about consistency, not correctness. According to the screen shots, they compute correct colours (based on fixing the luminance formulas, if I remember correctly (it's been a couple weeks since I read this thread)). Content analysis details: (-2.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 41544 Cc: simenheg@HIDDEN, mattiase@HIDDEN, tom@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) Eli Zaretskii <eliz@HIDDEN> writes: > How do they make things better, and what things, exactly? My > recollection is that this was about consistency, not correctness. According to the screen shots, they compute correct colours (based on fixing the luminance formulas, if I remember correctly (it's been a couple weeks since I read this thread)). > Also, the original discussion was about quite a few separate changes, > some of which were installed, so I don't think I have a clear idea > which parts you allude to. My impression was that only a few bug fixes were done, but the rest of the colour computation was not applied? That may be wrong -- Mattias? >> Would it be possible to add the new calculations with a defcustom to >> say whether to use the new or old methods? > > I don't think defcustom is the proper way of handling differences in > behavior at this low level. Different ways of computing colours? That's not very low level. -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 18 Aug 2020 14:07:25 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Tue Aug 18 10:07:25 2020 Received: from localhost ([127.0.0.1]:36549 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1k82Gm-0001uc-RI for submit <at> debbugs.gnu.org; Tue, 18 Aug 2020 10:07:25 -0400 Received: from eggs.gnu.org ([209.51.188.92]:48938) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1k82Gj-0001uM-TK for 41544 <at> debbugs.gnu.org; Tue, 18 Aug 2020 10:07:19 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:52698) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1k82Gd-0006kO-ID; Tue, 18 Aug 2020 10:07:11 -0400 Received: from [176.228.60.248] (port=2455 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1k82Ga-0006D7-JA; Tue, 18 Aug 2020 10:07:10 -0400 Date: Tue, 18 Aug 2020 17:06:52 +0300 Message-Id: <83d03of3pf.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Lars Ingebrigtsen <larsi@HIDDEN> In-Reply-To: <87eeo4m5kd.fsf@HIDDEN> (message from Lars Ingebrigtsen on Tue, 18 Aug 2020 15:44:50 +0200) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <1B0F31C8-1E11-4527-A053-DD2DE8235F58@HIDDEN> <83wo4g5hz6.fsf@HIDDEN> <49B7D7B5-D9E3-4E97-A749-CF5E8D8EE2C6@HIDDEN> <83mu5b5573.fsf@HIDDEN> <A829B1D4-5072-469D-A689-D448BA21176C@HIDDEN> <83lfku69q2.fsf@HIDDEN> <87eeo4m5kd.fsf@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 41544 Cc: simenheg@HIDDEN, mattiase@HIDDEN, tom@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) > From: Lars Ingebrigtsen <larsi@HIDDEN> > Cc: Mattias Engdegård <mattiase@HIDDEN>, > simenheg@HIDDEN, > tom@HIDDEN, 41544 <at> debbugs.gnu.org > Date: Tue, 18 Aug 2020 15:44:50 +0200 > > Eli Zaretskii <eliz@HIDDEN> writes: > > > I gave all the reasons I have. They are serious, at least to me. > > They have nothing to do with the quality of your research or of the > > resulting code. They have everything to do with considerations of > > stability, and with weighing risks and efforts vs advantages. If you > > don't regard such considerations as technical arguments, so be it. > > I understand your objections to changing this behaviour, but the new, > correct calculations make things a lot better. How do they make things better, and what things, exactly? My recollection is that this was about consistency, not correctness. Also, the original discussion was about quite a few separate changes, some of which were installed, so I don't think I have a clear idea which parts you allude to. > Would it be possible to add the new calculations with a defcustom to > say whether to use the new or old methods? I don't think defcustom is the proper way of handling differences in behavior at this low level.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 18 Aug 2020 13:45:02 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Tue Aug 18 09:45:02 2020 Received: from localhost ([127.0.0.1]:34564 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1k81vB-0004qO-W1 for submit <at> debbugs.gnu.org; Tue, 18 Aug 2020 09:45:02 -0400 Received: from quimby.gnus.org ([95.216.78.240]:32804) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <larsi@HIDDEN>) id 1k81vA-0004q1-Ju for 41544 <at> debbugs.gnu.org; Tue, 18 Aug 2020 09:45:01 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=gnus.org; s=20200322; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=c2kR48xifqUvT/KcFHRLym9SIZawk15PloxS/mhWjY0=; b=Py0tv8rAvnxPxJEc88t+gQ06JP S0c1Qr6wSJxZRDbtyAwka6NLH5hSl23+Z1un/IdNsWIiKzZz6+uKShTSRm2kirspVm0g3r7w8wAjr DzrM/3Bbc6qRcyzRsUyvTUjTruJWykLR3xiRt34NxZT3eUmfI6kTE5gHNtuhJJ2sJB2o=; Received: from cm-84.212.202.86.getinternet.no ([84.212.202.86] helo=xo) by quimby with esmtpsa (TLS1.3:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from <larsi@HIDDEN>) id 1k81v1-0007WC-Tj; Tue, 18 Aug 2020 15:44:54 +0200 From: Lars Ingebrigtsen <larsi@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <1B0F31C8-1E11-4527-A053-DD2DE8235F58@HIDDEN> <83wo4g5hz6.fsf@HIDDEN> <49B7D7B5-D9E3-4E97-A749-CF5E8D8EE2C6@HIDDEN> <83mu5b5573.fsf@HIDDEN> <A829B1D4-5072-469D-A689-D448BA21176C@HIDDEN> <83lfku69q2.fsf@HIDDEN> X-Now-Playing: Cocteau Twins's _Echoes in a Shallow Bay_: "Great Spangled Fritillary" Date: Tue, 18 Aug 2020 15:44:50 +0200 In-Reply-To: <83lfku69q2.fsf@HIDDEN> (Eli Zaretskii's message of "Wed, 10 Jun 2020 21:45:25 +0300") Message-ID: <87eeo4m5kd.fsf@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/28.0.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Report: Spam detection software, running on the system "quimby.gnus.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see @@CONTACT_ADDRESS@@ for details. Content preview: Eli Zaretskii <eliz@HIDDEN> writes: > I gave all the reasons I have. They are serious, at least to me. > They have nothing to do with the quality of your research or of the > resulting code. They have everything to do with consideration [...] Content analysis details: (-2.9 points, 5.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] X-Spam-Score: 0.0 (/) X-Debbugs-Envelope-To: 41544 Cc: simenheg@HIDDEN, Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN>, tom@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) Eli Zaretskii <eliz@HIDDEN> writes: > I gave all the reasons I have. They are serious, at least to me. > They have nothing to do with the quality of your research or of the > resulting code. They have everything to do with considerations of > stability, and with weighing risks and efforts vs advantages. If you > don't regard such considerations as technical arguments, so be it. I understand your objections to changing this behaviour, but the new, correct calculations make things a lot better. Would it be possible to add the new calculations with a defcustom to say whether to use the new or old methods? -- (domestic pets only, the antidote for overdose, milk.) bloggy blog: http://lars.ingebrigtsen.no
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 10 Jun 2020 19:12:37 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Jun 10 15:12:36 2020 Received: from localhost ([127.0.0.1]:35388 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jj69M-0000tl-OR for submit <at> debbugs.gnu.org; Wed, 10 Jun 2020 15:12:36 -0400 Received: from mail1450c50.megamailservers.eu ([91.136.14.50]:33908 helo=mail265c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <mattiase@HIDDEN>) id 1jj69K-0000tV-Cs for 41544 <at> debbugs.gnu.org; Wed, 10 Jun 2020 15:12:35 -0400 X-Authenticated-User: mattiase@HIDDEN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1591816347; bh=QMsPKopwUh2yLX96lDiF1HuKEKa0sJCY+DcQ7R9766w=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=KpjPHZZBq6jT2q8qxeynBwgZa3SlyUuXw2BxpUzSVpX0F4fr3ynYgcuvDmtLWk5oC 4PJrb+eNxTnzlXnwm4F9VmEh2wFYakiBODcS5lYMWSxT/yDtSfukgSRDdV+Vu3yB+j 4ovf/27l0Y0xARI4uqy5rU/tDA56PV+wD9zdNBv8= Feedback-ID: mattiase@HIDDEN Received: from [192.168.0.4] (c188-150-171-71.bredband.comhem.se [188.150.171.71]) (authenticated bits=0) by mail265c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 05AJCNsP000646; Wed, 10 Jun 2020 19:12:24 +0000 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.14\)) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN> X-Priority: 3 In-Reply-To: <7073e74c-9535-45c9-9d46-3e1080381a8c@default> Date: Wed, 10 Jun 2020 21:12:22 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <CC316C5E-4262-43B6-A532-FA08A11C29DF@HIDDEN> References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <1B0F31C8-1E11-4527-A053-DD2DE8235F58@HIDDEN> <0b4807d5-a5b9-47ad-91eb-d9240ea330e1@default> <E4880FCB-AC8D-4418-8512-FF63A1FC4760@HIDDEN> <7073e74c-9535-45c9-9d46-3e1080381a8c@default> To: Drew Adams <drew.adams@HIDDEN> X-Mailer: Apple Mail (2.3445.104.14) X-CTCH-RefID: str=0001.0A782F1D.5EE13027.0005, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: 0.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=D5w51cZj c=1 sm=1 tr=0 a=SF+I6pRkHZhrawxbOkkvaA==:117 a=SF+I6pRkHZhrawxbOkkvaA==:17 a=kj9zAlcOel0A:10 a=M51BFTxLslgA:10 a=yPCof4ZbAAAA:8 a=JPmaRQt990E2PDnAJv8A:9 a=CjuIK1q_8ugA:10 X-Spam-Score: 1.4 (+) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: 10 juni 2020 kl. 20.37 skrev Drew Adams <drew.adams@HIDDEN>: > So this never happened? The bug was "fixed" without > fixing this mismatch? Too bad, if so. I'm not dismissing your concern, but I did amend the doc string prior to pushing to state explicitly that it can be used for either foreground or background colours. Content analysis details: (1.4 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [URIs: megamailservers.eu] 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.4 KHOP_HELO_FCRDNS Relay HELO differs from its IP's reverse DNS X-Debbugs-Envelope-To: 41544 Cc: =?utf-8?Q?Simen_Heggest=C3=B8yl?= <simenheg@HIDDEN>, Eli Zaretskii <eliz@HIDDEN>, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.0 (/) 10 juni 2020 kl. 20.37 skrev Drew Adams <drew.adams@HIDDEN>: > So this never happened? The bug was "fixed" without > fixing this mismatch? Too bad, if so. I'm not dismissing your concern, but I did amend the doc string prior to = pushing to state explicitly that it can be used for either foreground or = background colours. I didn't bother making separate functions since they would probably have = been identical anyway, after studying the different cases. Hope that's = all right, and if you can argue -- after having used it yourself in your = own code -- that there is an important semantic distinction, then the = code can be modified accordingly.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 10 Jun 2020 18:45:53 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Jun 10 14:45:53 2020 Received: from localhost ([127.0.0.1]:35357 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jj5jU-0000Cl-VR for submit <at> debbugs.gnu.org; Wed, 10 Jun 2020 14:45:53 -0400 Received: from eggs.gnu.org ([209.51.188.92]:45358) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1jj5jS-0000CV-GA for 41544 <at> debbugs.gnu.org; Wed, 10 Jun 2020 14:45:51 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:46546) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1jj5jL-0002cR-KI; Wed, 10 Jun 2020 14:45:43 -0400 Received: from [176.228.60.248] (port=2723 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1jj5jK-0001B7-P0; Wed, 10 Jun 2020 14:45:43 -0400 Date: Wed, 10 Jun 2020 21:45:25 +0300 Message-Id: <83lfku69q2.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <A829B1D4-5072-469D-A689-D448BA21176C@HIDDEN> (message from Mattias =?utf-8?Q?Engdeg=C3=A5rd?= on Wed, 10 Jun 2020 20:29:37 +0200) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <1B0F31C8-1E11-4527-A053-DD2DE8235F58@HIDDEN> <83wo4g5hz6.fsf@HIDDEN> <49B7D7B5-D9E3-4E97-A749-CF5E8D8EE2C6@HIDDEN> <83mu5b5573.fsf@HIDDEN> <A829B1D4-5072-469D-A689-D448BA21176C@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.1 (--) X-Debbugs-Envelope-To: 41544 Cc: simenheg@HIDDEN, tom@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.1 (---) > From: Mattias Engdegård <mattiase@HIDDEN> > Date: Wed, 10 Jun 2020 20:29:37 +0200 > Cc: tom@HIDDEN, simenheg@HIDDEN, 41544 <at> debbugs.gnu.org > > > . the changes in list-colors-print > > . the addition of color-dark-p and the change in > > readable-foreground-color to use it > > . the replacement of css--contrasty-color with > > readable-foreground-color (assuming Tom doesn't object) > > Thank you, pushed to master. It does not prevent extended use later on. Thank you. > Would still like a better reason for it than a curt dismissal without any technical argument whatsoever other than a general aversion to change. The proposed code is likely considerably better researched and tested than what it aimed to replace ever was. I gave all the reasons I have. They are serious, at least to me. They have nothing to do with the quality of your research or of the resulting code. They have everything to do with considerations of stability, and with weighing risks and efforts vs advantages. If you don't regard such considerations as technical arguments, so be it. However, after saying that in so many different ways, I don't see any point in continuing the argument, as we evidently disagree. Let's move on, we both have better things to do.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
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s=corp-2020-01-29; bh=guIvITPg7n2ObkUc1TTA/V4yAnXvTpgvQUACDCr19EA=; b=D2HBANUtKQyzdiXousp7KBLawRA5z8M2WLfia+NyzH3EkUos2dm45V1WoRTlrPhVAbFG aIMQAZhaVta2ku93O4co/8lf5X8nfd0baVrRGo8P/MHvZhCd5vgBz9n1TxitrGqLgeoy Gm1Lqwpk5ysOjQngBILbT59IUZ1emfCa0T8IgpkahYxaHKHtE0fYDkfBtJmP7CW6+XSG CFJ70QT8RK+BUScxzePbiBcVye6VUdla6rr4g1phcU6mAqu1t7TgbVjg6OHsNjhz7o7u 97ZT5wuWG6gD0QenRPGx3q4WRJLUacjAPL9oth21NATR6Kvpa/omsRnU+twFvCO3DPR/ Pg== Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by aserp2120.oracle.com with ESMTP id 31jepnwuwr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 10 Jun 2020 18:38:03 +0000 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 05AIIgJ3060784; Wed, 10 Jun 2020 18:38:03 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userp3020.oracle.com with ESMTP id 31gmwtpen6-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Wed, 10 Jun 2020 18:38:03 +0000 Received: from abhmp0014.oracle.com (abhmp0014.oracle.com [141.146.116.20]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 05AIbnqt005876; Wed, 10 Jun 2020 18:37:52 GMT MIME-Version: 1.0 Message-ID: <7073e74c-9535-45c9-9d46-3e1080381a8c@default> Date: Wed, 10 Jun 2020 11:37:49 -0700 (PDT) From: Drew Adams <drew.adams@HIDDEN> To: =?iso-8859-1?B?TWF0dGlhcyBFbmdkZWflcmQ=?= <mattiase@HIDDEN> Subject: RE: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <1B0F31C8-1E11-4527-A053-DD2DE8235F58@HIDDEN> <0b4807d5-a5b9-47ad-91eb-d9240ea330e1@default> <E4880FCB-AC8D-4418-8512-FF63A1FC4760@HIDDEN> In-Reply-To: <E4880FCB-AC8D-4418-8512-FF63A1FC4760@HIDDEN> X-Priority: 3 X-Mailer: Oracle Beehive Extensions for Outlook 2.0.1.9.1 (1003210) [OL 16.0.5005.0 (x86)] Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9648 signatures=668680 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 spamscore=0 adultscore=0 mlxscore=0 mlxlogscore=891 bulkscore=0 malwarescore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006100139 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9648 signatures=668680 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 lowpriorityscore=0 suspectscore=0 priorityscore=1501 bulkscore=0 clxscore=1015 phishscore=0 impostorscore=0 malwarescore=0 mlxscore=0 cotscore=-2147483648 adultscore=0 spamscore=0 mlxlogscore=931 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006100139 X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 41544 Cc: =?iso-8859-1?B?U2ltZW4gSGVnZ2VzdPh5bA==?= <simenheg@HIDDEN>, Eli Zaretskii <eliz@HIDDEN>, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > > I still have the same comment as before, regarding > > the name `color-dark-p' and the doc string >=20 > Quite, both naming and documentation can be improved. Those will have to > follow the semantics, so that will have to be nailed first. So this never happened? The bug was "fixed" without fixing this mismatch? Too bad, if so.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 10 Jun 2020 18:29:45 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Jun 10 14:29:45 2020 Received: from localhost ([127.0.0.1]:35341 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jj5Ts-0008Ce-V0 for submit <at> debbugs.gnu.org; Wed, 10 Jun 2020 14:29:45 -0400 Received: from mail210c50.megamailservers.eu ([91.136.10.220]:58638 helo=mail194c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <mattiase@HIDDEN>) id 1jj5Tr-0008CV-Mm for 41544 <at> debbugs.gnu.org; Wed, 10 Jun 2020 14:29:44 -0400 X-Authenticated-User: mattiase@HIDDEN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1591813781; bh=fc/YGrssHJ8gVJ070dklY2+wiytkIn6XTq9Vxf/EIJM=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=lNeTm5oNKynfj+AVRRi9NDcP39tyvHn59Gul5t1Ra76hI4iLrmnHH6Jr3ioCD8INF qFnJn+0DeAy/yuD9TdzJyES5v4c4+7hT1Z6JcG2SBW06nd6A+JvxoWxv+fVuJtnA+E 3UmmXsiPblAILsPc0C5MaA2D2qP4EKF2a5ULlS7M= Feedback-ID: mattiase@HIDDEN Received: from [192.168.0.4] (c188-150-171-71.bredband.comhem.se [188.150.171.71]) (authenticated bits=0) by mail194c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 05AITc6R026660; Wed, 10 Jun 2020 18:29:39 +0000 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.14\)) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <83mu5b5573.fsf@HIDDEN> Date: Wed, 10 Jun 2020 20:29:37 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <A829B1D4-5072-469D-A689-D448BA21176C@HIDDEN> References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <1B0F31C8-1E11-4527-A053-DD2DE8235F58@HIDDEN> <83wo4g5hz6.fsf@HIDDEN> <49B7D7B5-D9E3-4E97-A749-CF5E8D8EE2C6@HIDDEN> <83mu5b5573.fsf@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> X-Mailer: Apple Mail (2.3445.104.14) X-CTCH-RefID: str=0001.0A782F16.5EE12695.0066, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: 0.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=KsozJleN c=1 sm=1 tr=0 a=SF+I6pRkHZhrawxbOkkvaA==:117 a=SF+I6pRkHZhrawxbOkkvaA==:17 a=kj9zAlcOel0A:10 a=M51BFTxLslgA:10 a=mDV3o1hIAAAA:8 a=ZKmGqOLGlA_ATwHfmhUA:9 a=CjuIK1q_8ugA:10 a=_FVE-zBwftR9WsbkzFJk:22 X-Spam-Score: 1.0 (+) X-Debbugs-Envelope-To: 41544 Cc: simenheg@HIDDEN, tom@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.0 (/) 10 juni 2020 kl. 17.08 skrev Eli Zaretskii <eliz@HIDDEN>: > Please make sure the doc string says that the function will return > either the black or the white color, depending on which one will > contrast better with COLOR. Otherwise it is impossible to know, > without looking at the code, that this function can return only these > two colors. A good suggestion -- followed. > Other than that, I'm okay with the following parts of your patch: >=20 > . the changes in list-colors-print > . the addition of color-dark-p and the change in > readable-foreground-color to use it > . the replacement of css--contrasty-color with > readable-foreground-color (assuming Tom doesn't object) Thank you, pushed to master. It does not prevent extended use later on. Would still like a better reason for it than a curt dismissal without = any technical argument whatsoever other than a general aversion to = change. The proposed code is likely considerably better researched and = tested than what it aimed to replace ever was.
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From: Eli Zaretskii <eliz@HIDDEN>
To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN>
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Mattias =?utf-8?Q?Engdeg=C3=A5rd?= on Wed, 10 Jun 2020 16:51:24 +0200)
Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance
References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN>
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> From: Mattias Engdegård <mattiase@HIDDEN>
> Date: Wed, 10 Jun 2020 16:51:24 +0200
> Cc: Tom Tromey <tom@HIDDEN>, simenheg@HIDDEN, 41544 <at> debbugs.gnu.org
>
> (defun readable-foreground-color (color)
> "Return a readable foreground color for background COLOR."
Please make sure the doc string says that the function will return
either the black or the white color, depending on which one will
contrast better with COLOR. Otherwise it is impossible to know,
without looking at the code, that this function can return only these
two colors.
Other than that, I'm okay with the following parts of your patch:
. the changes in list-colors-print
. the addition of color-dark-p and the change in
readable-foreground-color to use it
. the replacement of css--contrasty-color with
readable-foreground-color (assuming Tom doesn't object)
Please don't install anything else.
Thanks.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
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Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance
Date: Wed, 10 Jun 2020 16:51:24 +0200
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To: Eli Zaretskii <eliz@HIDDEN>
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9 juni 2020 kl. 18.20 skrev Eli Zaretskii <eliz@HIDDEN>:
>> Let's consider the three saturated colours #ff0000 (red), #00ff00 =
(green) and #0000ff (blue). Black text looks terrible on blue, as does =
white on green; black on red isn't good either. This comes as no =
surprise: the human eye is more sensitive to brightness levels of green =
than blue, with red somewhere in-between.
>=20
> Here we already not necessarily agree: at least on some text-mode
> terminals some of the above combinations look quite legible to me.
Of course there will be some terminals where some of the combinations =
are legible. But that wasn't the point, the point being that they are =
less legible that the alternative, and on most terminals substantially =
so.
> Like I said: individual taste and differences, as well as different
> RGB values used by some terminals for the same color names, can and do
> wreak havoc on this, so a perfect solution is simply not possible.
Nowhere did I claim perfection; let's tuck away the straw men. However, =
I do think we should strive to do as well as we can, and I think I'm not =
alone. This is not a matter of individual taste: colour perception is a =
science.
It is true that Emacs sometimes doesn't know the exact colours used by =
the terminal, but that is a problem that the old code suffers from as =
well. Maybe the old predicates are more robust for bad input? =
Unfortunately, there is no evidence of this at all; I've experimented =
with many terminals and settings. See further below for a =
counter-example.
> Again, I see no practical problems described here, just a theoretical
> issue with the particular implementations we have now. Those
> implementations do their job, although they are clearly not perfect.
> However, I seed no reason to seek perfection in this case.
Again, it is not a matter of perfection but about being better. Or more =
critically, avoiding being bad. The new predicate almost never gives bad =
results; the old ones often do.
If you want to argue for the old code, please come up with precise =
examples of colours for which they avoid a bad decision while =
colour-dark-p does not. You could also show how the old predicates are =
better than the new one in a majority of cases. Describe the =
circumstances (environment, configuration etc) so that they can be =
reproduced.
Meanwhile, here are two screenshots of Emacs displaying some lisp code, =
both using XTerm version 328, configured for 256 colours, with =
TERM=3Dxterm-256color, and the same background, without any Emacs =
customisation.
First, without the patch:
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--Apple-Mail=_6F17D297-4269-4872-8C80-C4479CA1382B
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain;
charset=us-ascii
This particular background is taken from the XTerm's 256-colour palette =
used by Emacs, and there are many more in that set exhibiting similar =
problems. Obviously, with 24-bit colour terminals, there is a large =
number of colours that cause trouble for the old heuristics.
> IMO, the commentary here doesn't explain enough, and actually begs
> more questions than it answers. What is "gamma-correction", and why
> is it pertinent here? Why is the power 2.2 a "good enough"
> approximation here? What are the other constants, and what is the
> meaning of each one of them? And pointing to the bug number for
> rationale of the cut-off value doesn't really help, since the
> discussion is very long, so I doubt people will easily find that
> rationale.
Fair enough -- I thought that the programmers who don't already know the =
theory would immediately look it up, but I've added a link to Wikipedia.
> I still don't understand why we need this function. Did you see any
> practical problems with using color-name-to-rgb? Why does it matter
> that it needs the display to be initialized? Would it be enough to
> document that it needs the display to be initialized?
If we use color-name-to-rgb then we get a crash on start-up with =
TERM=3Dxterm (for example), as explained before. I agree it's a somewhat =
artificial function; I've eliminated it in the attached patch.
> As I said before, I don't want to change the default value of
> frame-background-mode. This code has been relatively stable for quite
> some time, and the result is customizable if the user doesn't like the
> default. Changing the default value in subtle ways simply risks
> annoying users. There's nothing to gain here, only potential losses.
Quite the contrary: the new predicate is more robust than the old one, =
which I have argued with both concrete examples and theory. If you =
disagree, please supply both: why the AVG predicate is better, and =
specifically for what colours.
There is nothing to lose here, only potential gains.
Here is another screenshot: it compares the three old predicates with =
the new one for all colours in an Xterm with TERM=3Dxterm-16color. The =
left-hand columns show the contrasting decision with each colour as =
background, the right-hand columns with the same colour as foreground. =
max, avg and dist refer to the old predicates as per previous message; =
new is color-dark-p of the patch.
--Apple-Mail=_6F17D297-4269-4872-8C80-C4479CA1382B
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filename=xterm-16color-predicate-comparison.png
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--Apple-Mail=_6F17D297-4269-4872-8C80-C4479CA1382B
Content-Transfer-Encoding: quoted-printable
Content-Type: text/plain;
charset=us-ascii
Here is the same comparison on a terminal configured with the exact =
colours of a Linux VGA console, TERM=3Dlinux:
--Apple-Mail=_6F17D297-4269-4872-8C80-C4479CA1382B
Content-Disposition: inline;
filename=linux-console-predicate-comparison.png
Content-Type: image/png;
x-unix-mode=0644;
name="linux-console-predicate-comparison.png"
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--Apple-Mail=_6F17D297-4269-4872-8C80-C4479CA1382B
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Note how the Emacs's RGB values are far off (especially the brownish =
shade that it thinks is bright yellow), yet the new predicate does =
better than all the old ones here.
> Note that AFAIR CSS (and HTML in general) uses 24 BPP colors, whereas
> your color-dark-p is AFAICT based on 16-bit color values, not 8-bit.
No, CSS and Emacs normalise hex colours to the number of digits used, so =
that #123, #112233 and #111122223333 all represent the same colour. (The =
Windows-specific colour parser has a bug, as mentioned recently on =
emacs-devel; I intend to fix that since other colour parsers are buggy =
in other ways. This is completely unrelated to the current discussion.)
--Apple-Mail=_6F17D297-4269-4872-8C80-C4479CA1382B
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bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 9 Jun 2020 16:20:41 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Tue Jun 09 12:20:41 2020 Received: from localhost ([127.0.0.1]:60755 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jigzR-0005FI-BB for submit <at> debbugs.gnu.org; Tue, 09 Jun 2020 12:20:41 -0400 Received: from eggs.gnu.org ([209.51.188.92]:38266) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1jigzP-0005F4-Td for 41544 <at> debbugs.gnu.org; Tue, 09 Jun 2020 12:20:40 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:44931) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1jigzJ-0008AX-D6; Tue, 09 Jun 2020 12:20:33 -0400 Received: from [176.228.60.248] (port=3831 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1jigzI-0003Q6-TA; Tue, 09 Jun 2020 12:20:33 -0400 Date: Tue, 09 Jun 2020 19:20:13 +0300 Message-Id: <83wo4g5hz6.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN>, Tom Tromey <tom@HIDDEN> In-Reply-To: <1B0F31C8-1E11-4527-A053-DD2DE8235F58@HIDDEN> (message from Mattias =?utf-8?Q?Engdeg=C3=A5rd?= on Mon, 8 Jun 2020 15:11:36 +0200) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <1B0F31C8-1E11-4527-A053-DD2DE8235F58@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 41544 Cc: simenheg@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > From: Mattias Engdegård <mattiase@HIDDEN> > Date: Mon, 8 Jun 2020 15:11:36 +0200 > Cc: 41544 <at> debbugs.gnu.org > > > What practical problem is being solved here? > > The current predicates for determining whether a colour is light or dark are just bad. We can and should do better, and that's what this is all about. > > Let's consider the three saturated colours #ff0000 (red), #00ff00 (green) and #0000ff (blue). Black text looks terrible on blue, as does white on green; black on red isn't good either. This comes as no surprise: the human eye is more sensitive to brightness levels of green than blue, with red somewhere in-between. Here we already not necessarily agree: at least on some text-mode terminals some of the above combinations look quite legible to me. Like I said: individual taste and differences, as well as different RGB values used by some terminals for the same color names, can and do wreak havoc on this, so a perfect solution is simply not possible. > (color-distance "#ff0000" "black") => 162308 > (color-distance "#00ff00" "black") => 260100 > (color-distance "#0000ff" "black") => 194820 > > This means that we cannot fix DIST by tweaking its cut-off value; it's fundamentally unfit for this purpose. > > For a proper solution, we have theory to guide us: determine the perceived brightness of a colour, and classify everything below a cut-off value as dark, others as light. The patch uses a standard expression for relative luminance: Y = 0.2126R + 0.7152G + 0.0722B, where R, G and B are linear colour components. We assume a gamma of 2.2; it is nearly identical to the sRGB gamma curve and the results are almost the same. > > With a cut-off of 0.6, this predicate turns out to be quite good: much better than MAX, AVG or DIST at any rate. While not perfect, it's good enough in the sense that for colours where it seems to make the wrong decision, it's a fairly close call, and the colour is quite readable with both black and write as contrast. Again, I see no practical problems described here, just a theoretical issue with the particular implementations we have now. Those implementations do their job, although they are clearly not perfect. However, I seed no reason to seek perfection in this case. > diff --git a/lisp/facemenu.el b/lisp/facemenu.el > index b10d874b21..419b76101b 100644 > --- a/lisp/facemenu.el > +++ b/lisp/facemenu.el > @@ -621,12 +621,11 @@ list-colors-print I don't think this change is very important, but I don't object to installing it, since it only affects this single command, whose purpose is just to display the list of colors. > +(defun color-dark-p (rgb) > + "Whether RGB is more readable against white than black. > +RGB is a 3-element list (R G B), each component in the range [0,1]." > + (unless (<= 0 (apply #'min rgb) (apply #'max rgb) 1) > + (error "RGB components %S not in [0,1]" rgb)) > + (let* ((sr (nth 0 rgb)) > + (sg (nth 1 rgb)) > + (sb (nth 2 rgb)) > + ;; Gamma-correct the RGB components to linear values. > + ;; Use the power 2.2 as an approximation to sRGB gamma; > + ;; it should be good enough for the purpose of this function. > + (r (expt sr 2.2)) > + (g (expt sg 2.2)) > + (b (expt sb 2.2)) > + ;; Compute the relative luminance. > + (y (+ (* r 0.2126) (* g 0.7152) (* b 0.0722)))) > + ;; Compare it to a cut-off value determined experimentally; see bug#41544. > + (< y (eval-when-compile (expt 0.6 2.2))))) IMO, the commentary here doesn't explain enough, and actually begs more questions than it answers. What is "gamma-correction", and why is it pertinent here? Why is the power 2.2 a "good enough" approximation here? What are the other constants, and what is the meaning of each one of them? And pointing to the bug number for rationale of the cut-off value doesn't really help, since the discussion is very long, so I doubt people will easily find that rationale. If these questions cannot be reasonably answered in the comments, how about pointing to some article or URL where interested readers could read up on that? > +(defun frame--color-name-to-rgb (color frame) > + "Convert the COLOR string to a list of normalised RGB components. > +Like `color-name-to-rgb', but works even when the display has not yet > +been initialised." > + (mapcar (lambda (x) (/ x 65535.0)) (color-values color frame))) I still don't understand why we need this function. Did you see any practical problems with using color-name-to-rgb? Why does it matter that it needs the display to be initialized? Would it be enough to document that it needs the display to be initialized? > (defun frame-set-background-mode (frame &optional keep-face-specs) > "Set up display-dependent faces on FRAME. > Display-dependent faces are those which have different definitions > @@ -1181,13 +1187,9 @@ frame-set-background-mode > non-default-bg-mode) > ((not (color-values bg-color frame)) > default-bg-mode) > - ((>= (apply '+ (color-values bg-color frame)) > - ;; Just looking at the screen, colors whose > - ;; values add up to .6 of the white total > - ;; still look dark to me. > - (* (apply '+ (color-values "white" frame)) .6)) > - 'light) > - (t 'dark))) > + ((color-dark-p (frame--color-name-to-rgb bg-color frame)) > + 'dark) > + (t 'light))) As I said before, I don't want to change the default value of frame-background-mode. This code has been relatively stable for quite some time, and the result is customizable if the user doesn't like the default. Changing the default value in subtle ways simply risks annoying users. There's nothing to gain here, only potential losses. Same comment for calculation of background-mode frame parameter in the various lisp/term/*.el files. I don't want to make those changes. > --- a/lisp/textmodes/css-mode.el > +++ b/lisp/textmodes/css-mode.el > @@ -1149,17 +1149,6 @@ css--compute-color > ;; Evaluate to the color if the name is found. > ((css--named-color start-point match)))) > > -(defun css--contrasty-color (name) > - "Return a color that contrasts with NAME. > -NAME is of any form accepted by `color-distance'. > -The returned color will be usable by Emacs and will contrast > -with NAME; in particular so that if NAME is used as a background > -color, the returned color can be used as the foreground and still > -be readable." > - ;; See bug#25525 for a discussion of this. > - (if (> (color-distance name "black") 292485) > - "black" "white")) > - > (defcustom css-fontify-colors t > "Whether CSS colors should be fontified using the color as the background. > When non-`nil', a text representing CSS color will be fontified > @@ -1199,7 +1188,8 @@ css--fontify-region > (add-text-properties > start (point) > (list 'face (list :background color > - :foreground (css--contrasty-color color) > + :foreground (readable-foreground-color > + color) > :box '(:line-width -1)))))))))))) > extended-region)) If Tom is okay with this change, I won't object. Note that AFAIR CSS (and HTML in general) uses 24 BPP colors, whereas your color-dark-p is AFAICT based on 16-bit color values, not 8-bit. ISTR there were issues with converting between these two representations, something to do with whether an 8-bit component should be converted to a 16-bit component by zero-extending it or by a left shift (i.e. whether #ff should be mapped to #00ff or to #ff00). Apologies if I'm confused here. Thanks.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 9 Jun 2020 12:19:41 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Tue Jun 09 08:19:41 2020 Received: from localhost ([127.0.0.1]:59203 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jidED-00075W-I3 for submit <at> debbugs.gnu.org; Tue, 09 Jun 2020 08:19:41 -0400 Received: from mail1451c50.megamailservers.eu ([91.136.14.51]:32886 helo=mail266c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <mattiase@HIDDEN>) id 1jidEB-00075A-Gy for 41544 <at> debbugs.gnu.org; Tue, 09 Jun 2020 08:19:40 -0400 X-Authenticated-User: mattiase@HIDDEN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1591705172; bh=mLlu2TmNjOz9T0i9gWaiWzCAy2iuL49lCnXMEnj2Slk=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=VD6UEujI0aThoN8wuXl81GapxHXvUhBieqIGRbUe0OqEa0w9Uba0LX6oscWMkaI4O t02eNjrgDAMAWosgwdALVOwEzJGBwmpQiabDX3hsDnz8ihlf1bt/iiPXevgk+2DHjp cLFBxE0IJ+wLH8NvsLK4/svuQl2l1Ha6590wQbEE= Feedback-ID: mattiase@HIDDEN Received: from stanniol.lan (c-4e4ae655.032-75-73746f71.bbcust.telenor.se [85.230.74.78]) (authenticated bits=0) by mail266c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 059CJTvw018661; Tue, 9 Jun 2020 12:19:31 +0000 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.14\)) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <83zh9f6j9v.fsf@HIDDEN> Date: Tue, 9 Jun 2020 14:19:29 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <0BCBDA86-6586-4C73-8E58-DFDE8762C250@HIDDEN> References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <b4cbf0a8-d59a-4e8c-a8cf-a8df090f36bf@default> <5AEB442C-5592-46E4-BC38-185BA9D2D956@HIDDEN> <83zh9f6j9v.fsf@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> X-Mailer: Apple Mail (2.3445.104.14) X-CTCH-RefID: str=0001.0A782F19.5EDF7E54.0042:SCFSTAT68638221, ss=1, re=-4.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: -4.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=A5MSwJeG c=1 sm=1 tr=0 a=klNLuyVZdLUgl+K5Uafb2A==:117 a=klNLuyVZdLUgl+K5Uafb2A==:17 a=kj9zAlcOel0A:10 a=M51BFTxLslgA:10 a=mDV3o1hIAAAA:8 a=TlfYVcsWVqIc_Eqo5lQA:9 a=CjuIK1q_8ugA:10 a=_FVE-zBwftR9WsbkzFJk:22 X-Spam-Score: 1.4 (+) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: 7 juni 2020 kl. 16.30 skrev Eli Zaretskii <eliz@HIDDEN>: > Background colors affect larger > portions of display, and therefore a bright background is perceived as > brighter and a dark background as darker, than when the same color is > used as foreground. Content analysis details: (1.4 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [URIs: gnu.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.4 KHOP_HELO_FCRDNS Relay HELO differs from its IP's reverse DNS X-Debbugs-Envelope-To: 41544 Cc: 41544 <at> debbugs.gnu.org, drew.adams@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.0 (/) 7 juni 2020 kl. 16.30 skrev Eli Zaretskii <eliz@HIDDEN>: > Background colors affect larger > portions of display, and therefore a bright background is perceived as > brighter and a dark background as darker, than when the same color is > used as foreground. Yes, but we should ask what that means in terms of a predicate to select = between them. Of all comparisons I've done, the latest color-dark-p = predicate appears to work fairly well for selecting backgrounds, in the = senses that it's never bad. You are quite right that the optimal predicate may be different, and I'm = not at all opposed to having two separate functions. They may be = identical initially, but could diverge as we learn more. Experimentally, it looks like the case of selecting a black/white = background is more forgiving: the set of 'ambiguous' colours that = contrast well with both black and white greater than when selecting a = black/white text. If you could come up with a colour that strongly prefers a black = background but a white foreground, or vice versa, then that would = provide us with more insight. If not, it might indicate that those = colours are rare.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 8 Jun 2020 19:53:26 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Jun 08 15:53:26 2020 Received: from localhost ([127.0.0.1]:57958 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jiNpl-0003a9-UF for submit <at> debbugs.gnu.org; Mon, 08 Jun 2020 15:53:26 -0400 Received: from mail222c50.megamailservers.eu ([91.136.10.232]:44770 helo=mail33c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <mattiase@HIDDEN>) id 1jiNpj-0003Zy-2j for 41544 <at> debbugs.gnu.org; Mon, 08 Jun 2020 15:53:24 -0400 X-Authenticated-User: mattiase@HIDDEN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1591646000; bh=ydtpKebZiularrnzZo/Ni7dJl89rnZA1wioo1woqt30=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=lpACYnG6Wjp8f3mGnZm2GL0lw6qMzavCFyVNQsJW+KQi6bZAaAhQRrtEW1ybfWqg/ Yd/aXjcvlomYBAEGwvoftcbZiEwmmeKzAvfxFzOP9tZO1KMYcg504HzbrMutyWUNI0 082TrZInS4BGZzU9wl/rlpJnoSjRHoWDIbO7a59E= Feedback-ID: mattiase@HIDDEN Received: from stanniol.lan (c-4e4ae655.032-75-73746f71.bbcust.telenor.se [85.230.74.78]) (authenticated bits=0) by mail33c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 058JrHPR032078; Mon, 8 Jun 2020 19:53:19 +0000 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.14\)) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN> X-Priority: 3 In-Reply-To: <0b4807d5-a5b9-47ad-91eb-d9240ea330e1@default> Date: Mon, 8 Jun 2020 21:53:17 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <E4880FCB-AC8D-4418-8512-FF63A1FC4760@HIDDEN> References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <1B0F31C8-1E11-4527-A053-DD2DE8235F58@HIDDEN> <0b4807d5-a5b9-47ad-91eb-d9240ea330e1@default> To: Drew Adams <drew.adams@HIDDEN> X-Mailer: Apple Mail (2.3445.104.14) X-CTCH-RefID: str=0001.0A782F19.5EDE9730.004C:SCFSTAT68638221, ss=1, re=-4.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: -4.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=eaJDgIMH c=1 sm=1 tr=0 a=klNLuyVZdLUgl+K5Uafb2A==:117 a=klNLuyVZdLUgl+K5Uafb2A==:17 a=kj9zAlcOel0A:10 a=M51BFTxLslgA:10 a=yPCof4ZbAAAA:8 a=rtNEyu4AUv_osww1j8AA:9 a=CjuIK1q_8ugA:10 X-Spam-Score: 1.4 (+) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: 8 juni 2020 kl. 16.30 skrev Drew Adams <drew.adams@HIDDEN>: > Sounds reasonable. Maybe you could attach some > screenshots (pic = 1000 words)? You could try applying the latest patch, and run list-colors-display. To see other predicates in action, just edit color-dark-p to your heart's desire, and run list-colors-display again, and see which [...] Content analysis details: (1.4 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [URIs: megamailservers.eu] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.4 KHOP_HELO_FCRDNS Relay HELO differs from its IP's reverse DNS X-Debbugs-Envelope-To: 41544 Cc: =?utf-8?Q?Simen_Heggest=C3=B8yl?= <simenheg@HIDDEN>, Eli Zaretskii <eliz@HIDDEN>, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.0 (/) 8 juni 2020 kl. 16.30 skrev Drew Adams <drew.adams@HIDDEN>: > Sounds reasonable. Maybe you could attach some > screenshots (pic =3D 1000 words)? You could try applying the latest patch, and run list-colors-display. To = see other predicates in action, just edit color-dark-p to your heart's = desire, and run list-colors-display again, and see which one you think = is better. > I still have the same comment as before, regarding > the name `color-dark-p' and the doc string Quite, both naming and documentation can be improved. Those will have to = follow the semantics, so that will have to be nailed first.
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To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN>
Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance
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Date: Mon, 08 Jun 2020 20:39:28 +0200
In-Reply-To: <52B0E3DA-6CE4-47D3-8243-6E2C2F64D7BD@HIDDEN> ("Mattias
=?utf-8?Q?Engdeg=C3=A5rd=22's?= message of "Sun, 7 Jun 2020 21:27:43
+0200")
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Mattias Engdeg=C3=A5rd <mattiase@HIDDEN> writes:
> 7 juni 2020 kl. 21.23 skrev Simen Heggest=C3=B8yl <simenheg@HIDDEN>:
>
>>> Perhaps you could try list-colours-display and see if you can spot a
>>> pattern?
>>
>> Hm, that one seems to use a black foreground color for all of the
>> entries(?).
>
> Yes, but with the patch posted, it should be using color-dark-p. Please g=
ive it a go.
Ah. With my screen and pair of eyes, every entry looks readable
there. The worst are, like you said, those darker reddish colors, like
orange3 and LightSalmon3.
-- Simen
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 8 Jun 2020 14:30:42 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Jun 08 10:30:42 2020 Received: from localhost ([127.0.0.1]:57602 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jiInS-00046Y-Fr for submit <at> debbugs.gnu.org; Mon, 08 Jun 2020 10:30:42 -0400 Received: from aserp2120.oracle.com ([141.146.126.78]:51902) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <drew.adams@HIDDEN>) id 1jiInR-00046M-4C for 41544 <at> debbugs.gnu.org; Mon, 08 Jun 2020 10:30:41 -0400 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 058EMqTY040352; Mon, 8 Jun 2020 14:30:34 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=mime-version : message-id : date : from : sender : to : cc : subject : references : in-reply-to : content-type : content-transfer-encoding; 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Mon, 08 Jun 2020 14:30:32 +0000 Received: from abhmp0007.oracle.com (abhmp0007.oracle.com [141.146.116.13]) by aserv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 058EUSAQ000647; Mon, 8 Jun 2020 14:30:28 GMT MIME-Version: 1.0 Message-ID: <0b4807d5-a5b9-47ad-91eb-d9240ea330e1@default> Date: Mon, 8 Jun 2020 07:30:27 -0700 (PDT) From: Drew Adams <drew.adams@HIDDEN> To: =?utf-8?B?TWF0dGlhcyBFbmdkZWfDpXJk?= <mattiase@HIDDEN>, Eli Zaretskii <eliz@HIDDEN>, =?utf-8?B?U2ltZW4gSGVnZ2VzdMO4eWw=?= <simenheg@HIDDEN> Subject: RE: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <1B0F31C8-1E11-4527-A053-DD2DE8235F58@HIDDEN> In-Reply-To: <1B0F31C8-1E11-4527-A053-DD2DE8235F58@HIDDEN> X-Priority: 3 X-Mailer: Oracle Beehive Extensions for Outlook 2.0.1.9.1 (1003210) [OL 16.0.5005.0 (x86)] Content-Type: text/plain; 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Maybe you could attach some screenshots (pic =3D 1000 words)? ___ I still have the same comment as before, regarding the name `color-dark-p' and the doc string, FWIW: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D41544#103
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
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Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance
Date: Mon, 8 Jun 2020 15:11:36 +0200
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To: Eli Zaretskii <eliz@HIDDEN>,
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Content preview: 6 juni 2020 kl. 20.27 skrev Eli Zaretskii <eliz@HIDDEN>:
> What practical problem is being solved here? The current predicates for
determining whether a colour is light or dark are just bad. We can and should
do better, and that's what this is all about.
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6 juni 2020 kl. 20.27 skrev Eli Zaretskii <eliz@HIDDEN>:
> What practical problem is being solved here?
The current predicates for determining whether a colour is light or dark =
are just bad. We can and should do better, and that's what this is all =
about.
Let's consider the three saturated colours #ff0000 (red), #00ff00 =
(green) and #0000ff (blue). Black text looks terrible on blue, as does =
white on green; black on red isn't good either. This comes as no =
surprise: the human eye is more sensitive to brightness levels of green =
than blue, with red somewhere in-between.
(These three colours just serve as illustrative examples; large chunks =
of the RGB space will share the same properties.)
How do the existing predicates do? Let's call them MAX, AVG and DIST.
MAX: dark iff max(r,g,b) < 0.5
This classifies saturated red and blue as light, which is clearly =
terrible.
AVG: dark iff (r+g+b) / 3 < 0.6
This classifies saturated green as dark, which is also wrong.
DIST: dark iff (color-distance c "black") =E2=89=A4 292485
This one also thinks saturated green is dark. While the approach here =
looks reasonable at first blush, it's really not: color-distance uses a =
simplified expression for how dissimilar two colours are, but doesn't do =
a very good job at determining brightness. For instance, its heavy blue =
weight makes no sense when used in this way:
(color-distance "#ff0000" "black") =3D> 162308
(color-distance "#00ff00" "black") =3D> 260100
(color-distance "#0000ff" "black") =3D> 194820
This means that we cannot fix DIST by tweaking its cut-off value; it's =
fundamentally unfit for this purpose.
For a proper solution, we have theory to guide us: determine the =
perceived brightness of a colour, and classify everything below a =
cut-off value as dark, others as light. The patch uses a standard =
expression for relative luminance: Y =3D 0.2126R + 0.7152G + 0.0722B, =
where R, G and B are linear colour components. We assume a gamma of 2.2; =
it is nearly identical to the sRGB gamma curve and the results are =
almost the same.
With a cut-off of 0.6, this predicate turns out to be quite good: much =
better than MAX, AVG or DIST at any rate. While not perfect, it's good =
enough in the sense that for colours where it seems to make the wrong =
decision, it's a fairly close call, and the colour is quite readable =
with both black and write as contrast.
I have tested it on several platforms and monitors, including 80x25 VGA =
hardware text mode, and have yet to find a case where it fails, which =
definitely cannot be said about the old predicates.
We can still tweak it: mainly the cut-off value (which is just =
experimentally determined) but also the coefficients and the gamma =
correction. Although technically valid, they aren't holy.
> This code's algorithm and rationale should be explained in the
> comments before we can discuss whether it's an improvement and why.
Thanks, I have improved this in the new patch.
This patch should also use the right coefficients (see above); I think I =
got them wrong the first time.
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--Apple-Mail=_187E4226-740F-462B-93E6-2EE96E09EA79--
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 7 Jun 2020 19:27:57 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Jun 07 15:27:57 2020 Received: from localhost ([127.0.0.1]:54950 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1ji0xZ-0000bC-4Z for submit <at> debbugs.gnu.org; Sun, 07 Jun 2020 15:27:57 -0400 Received: from mail1477c50.megamailservers.eu ([91.136.14.77]:54790 helo=mail118c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <mattiase@HIDDEN>) id 1ji0xW-0000av-Fj for 41544 <at> debbugs.gnu.org; Sun, 07 Jun 2020 15:27:55 -0400 X-Authenticated-User: mattiase@HIDDEN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1591558066; bh=ptgpP/XtKhWA2M3Jo+MgZGyczWxIcmObjGIaT1a9R50=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=Z7tjN4NTnw0yYJ4Zjx6e1+ICeWmInIIrqOX7FyHmUHcrp/SLf4oAnC+/sHw76OV0R b22O9jp5A2cwXYrDeheZuIrflNW8tJgwHiKHJ3ojR+26mWrTSl1vZGMhepCgIEuHB/ NETKJn8MniKgxgqZ89R9zF73qjfFG4WCzHXAlWj0= Feedback-ID: mattiase@HIDDEN Received: from stanniol.lan (c-4e4ae655.032-75-73746f71.bbcust.telenor.se [85.230.74.78]) (authenticated bits=0) by mail118c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 057JRibv011181; Sun, 7 Jun 2020 19:27:45 +0000 Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.14\)) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <87d06ar87d.fsf@simenheg@HIDDEN> Date: Sun, 7 Jun 2020 21:27:43 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <52B0E3DA-6CE4-47D3-8243-6E2C2F64D7BD@HIDDEN> References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <87pnabfdr5.fsf@simenheg@HIDDEN> <2F9BF919-4E8B-4802-AEE8-4438A78B4F68@HIDDEN> <87d06ar87d.fsf@simenheg@HIDDEN> To: =?utf-8?Q?Simen_Heggest=C3=B8yl?= <simenheg@HIDDEN> X-Mailer: Apple Mail (2.3445.104.14) X-CTCH-RefID: str=0001.0A782F27.5EDD3F51.002B:SCFSTAT68638221, ss=1, re=-4.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: -4.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=KaGsTjQD c=1 sm=1 tr=0 a=klNLuyVZdLUgl+K5Uafb2A==:117 a=klNLuyVZdLUgl+K5Uafb2A==:17 a=IkcTkHD0fZMA:10 a=M51BFTxLslgA:10 a=7DrQrguiAAAA:8 a=LnkmoK0KZgWA8aYg0TwA:9 a=QEXdDO2ut3YA:10 a=5p0t1moz68ydotlU2Z85:22 X-Spam-Score: 1.0 (+) X-Debbugs-Envelope-To: 41544 Cc: Richard Copley <rcopley@HIDDEN>, Eli Zaretskii <eliz@HIDDEN>, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.0 (/) 7 juni 2020 kl. 21.23 skrev Simen Heggest=C3=B8yl <simenheg@HIDDEN>: >> Perhaps you could try list-colours-display and see if you can spot a >> pattern? >=20 > Hm, that one seems to use a black foreground color for all of the > entries(?). Yes, but with the patch posted, it should be using color-dark-p. Please = give it a go. (An updated patch as well as a longer discussion of the principles is = upcoming; a bit busy with other things at the moment.)
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 7 Jun 2020 19:26:55 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Jun 07 15:26:55 2020 Received: from localhost ([127.0.0.1]:54946 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1ji0wY-0000ZW-RH for submit <at> debbugs.gnu.org; Sun, 07 Jun 2020 15:26:55 -0400 Received: from aibo.runbox.com ([91.220.196.211]:46380) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <simenheg@HIDDEN>) id 1ji0wX-0000ZO-1V for 41544 <at> debbugs.gnu.org; Sun, 07 Jun 2020 15:26:53 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=runbox.com; s=selector1; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From; bh=bDI84Ln3VUbcEABgectFB1VNOnv2Z9TBaOp4xXObZCY=; b=TmoKYl+i8IGqUvDfyB8qMBBg8d abpp4ENlf5iEpph/RvmeDxHn+fnHoE7wy4vj2l61Uen7PiAykxwJcBAsdCMw6Mlvp5bDJhh8kfD4O wfaaX1fLSupZiNF+tZucxgphkmmqUt4y50HgDjKsvDejh7Un7w192qCOs8sRGPd2xLlXmR7iF73Ca HBkqTNGJRUFEUcgkRIDpo+m97HBrdgHLJ2679xWXB4qO/Xy0JHR6UhSLN9BEwcrDMDCOPTxCVhxfX 7BqCaPuDQw2O/L1xQWDALZ+E5myf+0O4ti1EvB/uISrfe6RKmD/KwjbO+YCzsFPyV/N7y4R5dDHwR ONjonz7Q==; Received: from [10.9.9.73] (helo=submission02.runbox) by mailtransmit02.runbox with esmtp (Exim 4.86_2) (envelope-from <simenheg@HIDDEN>) id 1ji0wW-0006CF-D8; Sun, 07 Jun 2020 21:26:52 +0200 Received: by submission02.runbox with esmtpsa [Authenticated alias (963757)] (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) id 1ji0wU-0001Xg-H5; Sun, 07 Jun 2020 21:26:50 +0200 From: =?utf-8?Q?Simen_Heggest=C3=B8yl?= <simenheg@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <87pnabfdr5.fsf@simenheg@HIDDEN> <831rmr7xzz.fsf@HIDDEN> Date: Sun, 07 Jun 2020 21:26:50 +0200 In-Reply-To: <831rmr7xzz.fsf@HIDDEN> (Eli Zaretskii's message of "Sun, 07 Jun 2020 17:26:40 +0300") Message-ID: <878sgyr81x.fsf@simenheg@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.91 (gnu/linux) MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="=-=-=" X-Spam-Score: 0.3 (/) X-Debbugs-Envelope-To: 41544 Cc: rcopley@HIDDEN, mattiase@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.7 (/) --=-=-= Content-Type: text/plain Eli Zaretskii <eliz@HIDDEN> writes: > We can (and did) tweak the various constants involved in this, more > than once. The lesson I took from that is that we could never produce > something that will fit all the needs, let alone satisfy all the > users. There are two main factors here on which we have no control: > the subjective differences between color perception by different > people, and variations in how different terminals and displays show > the same colors. > > That is why I object to making changes in this low-level functionality > with the motivation of "fixing them all": I think it's simply > impossible. We will make it slightly better in some situations and > slightly worse in others. There's no net win here. Maybe the ultimate fix in CSS mode's case could be to display the color separate from the text. Firefox, for instance, displays the color in a little circle next to the color code (screenshot attached). I'm not sure how to implement it in Emacs, though. -- Simen --=-=-= Content-Type: image/png Content-Disposition: attachment; filename=firefox-color-indicator.png Content-Transfer-Encoding: base64 iVBORw0KGgoAAAANSUhEUgAAAOMAAABVCAYAAAC7HVMkAAABhGlDQ1BJQ0MgcHJvZmlsZQAAKJF9 kT1Iw0AcxV9btSIVkXYQcchQnSyIiuimVShChVArtOpgcukXNGlIUlwcBdeCgx+LVQcXZ10dXAVB 8APEydFJ0UVK/F9SaBHjwXE/3t173L0D/PUyU82OMUDVLCOViAuZ7KoQfEUXggijHzMSM/U5UUzC c3zdw8fXuxjP8j735+hVciYDfALxLNMNi3iDeGrT0jnvE0dYUVKIz4lHDbog8SPXZZffOBcc9vPM iJFOzRNHiIVCG8ttzIqGSjxJHFVUjfL9GZcVzluc1XKVNe/JXxjKaSvLXKc5hAQWsQQRAmRUUUIZ FmK0aqSYSNF+3MM/6PhFcsnkKoGRYwEVqJAcP/gf/O7WzE+Mu0mhOND5Ytsfw0BwF2jUbPv72LYb J0DgGbjSWv5KHZj+JL3W0qJHQN82cHHd0uQ94HIHGHjSJUNypABNfz4PvJ/RN2WB8C3Qs+b21tzH 6QOQpq6SN8DBITBSoOx1j3d3t/f275lmfz9yqXKnFTq0VAAAAAZiS0dEAP0A+AC5QI0G0wAAAAlw SFlzAAAuIwAALiMBeKU/dgAAAAd0SU1FB+QGBxMUJ8ZSQToAAAAZdEVYdENvbW1lbnQAQ3JlYXRl ZCB3aXRoIEdJTVBXgQ4XAAATjklEQVR42u2deXhU1d3HP7NkZpJJZpJM9klCQAIiSyCANBokENBa 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bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
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From: =?utf-8?Q?Simen_Heggest=C3=B8yl?= <simenheg@HIDDEN>
To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN>
Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance
References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN>
<77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN>
<83y2p5cumz.fsf@HIDDEN>
<B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN>
<83blm0cjlz.fsf@HIDDEN>
<DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN>
<83367ccf8w.fsf@HIDDEN>
<624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN>
<83o8pyc4bq.fsf@HIDDEN>
<55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN>
<835zc5bsut.fsf@HIDDEN>
<3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN>
<838sh0abzz.fsf@HIDDEN>
<CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN>
<83r1us8kw6.fsf@HIDDEN>
<020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN>
<83img48ffx.fsf@HIDDEN>
<EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN>
<83bllw82xt.fsf@HIDDEN> <87pnabfdr5.fsf@simenheg@HIDDEN>
<2F9BF919-4E8B-4802-AEE8-4438A78B4F68@HIDDEN>
Date: Sun, 07 Jun 2020 21:23:34 +0200
In-Reply-To: <2F9BF919-4E8B-4802-AEE8-4438A78B4F68@HIDDEN> ("Mattias
=?utf-8?Q?Engdeg=C3=A5rd=22's?= message of "Sun, 7 Jun 2020 12:14:13
+0200")
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Mattias Engdeg=C3=A5rd <mattiase@HIDDEN> writes:
> Perhaps you could try list-colours-display and see if you can spot a
> pattern?
Hm, that one seems to use a black foreground color for all of the
entries(?).
-- Simen
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 7 Jun 2020 16:14:34 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Jun 07 12:14:34 2020 Received: from localhost ([127.0.0.1]:54756 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jhxwQ-00024N-KY for submit <at> debbugs.gnu.org; Sun, 07 Jun 2020 12:14:34 -0400 Received: from userp2130.oracle.com ([156.151.31.86]:48124) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <drew.adams@HIDDEN>) id 1jhxwO-00024A-Ti for 41544 <at> debbugs.gnu.org; Sun, 07 Jun 2020 12:14:33 -0400 Received: from pps.filterd (userp2130.oracle.com [127.0.0.1]) by userp2130.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 057GCA5M135512; Sun, 7 Jun 2020 16:14:16 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=mime-version : message-id : date : from : sender : to : cc : subject : references : in-reply-to : content-type : content-transfer-encoding; s=corp-2020-01-29; bh=w4L+YVdHimdlNtSqE8u4YMQCnyTWBOYvDuA6E6Aeihg=; b=hMQ1hM/d379ArZCsfjrpZ0yNbz9OwdvkJPbMsP+RjFmCc8P8Q5GtXRVhJ8joJGMJoS1y Uo3bxgYFXGIXGpqzImRmTNf1T1m15msmHwvoSLD3mfg5a+DFpHCN1ryERYYFz6pjqWrN SOgGKx7yO/MxUI++GWFf/gWXIryukyBW0p18JwGkU12JwsZepoLdbHPDLjV5SOBTl4M7 p/8xCXiEYl1NIIU4diCo+buURR8ztcdDpUy939ylkgKP9D4niepCHXzL20q2dBciJdPl 5ablXXEpUoD0D70Ja7OklNx8d4Dg+TgvONE2b1k4nFhFBY3kTTwAC5SlO8q59gn7PKXZ Rg== Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by userp2130.oracle.com with ESMTP id 31g2jqup02-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Sun, 07 Jun 2020 16:14:16 +0000 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 057G8HVk161290; Sun, 7 Jun 2020 16:12:16 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userp3020.oracle.com with ESMTP id 31gmwnt11n-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 07 Jun 2020 16:12:16 +0000 Received: from abhmp0003.oracle.com (abhmp0003.oracle.com [141.146.116.9]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 057GCFRZ026435; Sun, 7 Jun 2020 16:12:15 GMT MIME-Version: 1.0 Message-ID: <80aee7da-3f99-4203-8912-81b8cc413326@default> Date: Sun, 7 Jun 2020 09:12:11 -0700 (PDT) From: Drew Adams <drew.adams@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN>, =?utf-8?B?TWF0dGlhcyBFbmdkZWfDpXJk?= <mattiase@HIDDEN> Subject: RE: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <b4cbf0a8-d59a-4e8c-a8cf-a8df090f36bf@default> <5AEB442C-5592-46E4-BC38-185BA9D2D956@HIDDEN> <83zh9f6j9v.fsf@HIDDEN> In-Reply-To: <83zh9f6j9v.fsf@HIDDEN> X-Priority: 3 X-Mailer: Oracle Beehive Extensions for Outlook 2.0.1.9.1 (1003210) [OL 16.0.5005.0 (x86)] Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9645 signatures=668680 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 suspectscore=0 spamscore=0 adultscore=0 mlxscore=0 mlxlogscore=999 bulkscore=0 malwarescore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006070123 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9645 signatures=668680 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 impostorscore=0 cotscore=-2147483648 priorityscore=1501 spamscore=0 suspectscore=0 lowpriorityscore=0 bulkscore=0 mlxlogscore=999 malwarescore=0 mlxscore=0 phishscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006070124 X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 41544 Cc: 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > IME, it is unreasonable to assume that a pair of colors will be > perceived as "contrasting enough" no matter which of them is > foreground and which background. Background colors affect larger > portions of display, and therefore a bright background is perceived as > brighter and a dark background as darker, than when the same color is > used as foreground. I agree with this. And as you said earlier, different eyes see differently (and different devices display differently).
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 7 Jun 2020 16:13:07 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Jun 07 12:13:07 2020 Received: from localhost ([127.0.0.1]:54751 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jhxv1-000220-9E for submit <at> debbugs.gnu.org; Sun, 07 Jun 2020 12:13:07 -0400 Received: from userp2120.oracle.com ([156.151.31.85]:34964) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <drew.adams@HIDDEN>) id 1jhxuz-00021W-Qv for 41544 <at> debbugs.gnu.org; Sun, 07 Jun 2020 12:13:06 -0400 Received: from pps.filterd (userp2120.oracle.com [127.0.0.1]) by userp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 057GCviN179316; Sun, 7 Jun 2020 16:12:57 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=mime-version : message-id : date : from : sender : to : cc : subject : references : in-reply-to : content-type : content-transfer-encoding; s=corp-2020-01-29; bh=45w37v3jUjvrwJ6FVj7CT1kc8en5/WZUPaVO8jxZodI=; b=Y/eijj47HXNmMEKbi5/Ay+ECu6+pf966vZwp+yT7OxrmvVbYKL+1vi4QF7IIo657ePNL UL6PvGsy6O9YQGQSDFVST/099gb4hsUXYxRIbFK1ZLzwfGFO+9Ut6wkIwgc67s08MHM1 A2/Hljkqq07ZB8N+pqv2+MJ9G10p93JoaEDQhpW55jPOxDpv5yVXm85ktuMmPL9bJ4V1 ucTgJDvyGLIXkG996gVXCEmxiilh1HZ2f0ST2t+rgtpLfhcQSvPTBhTnVlOrcg45ETpf 4eNMjGmdCLeUe0x+W1HH/pS6VckoKG5dIObmi9x31s9eoGatMoste20r3600ANvOce5V zA== Received: from aserp3020.oracle.com (aserp3020.oracle.com [141.146.126.70]) by userp2120.oracle.com with ESMTP id 31g3smkj2c-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Sun, 07 Jun 2020 16:12:56 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 057G8F0W043726; Sun, 7 Jun 2020 16:10:56 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserp3020.oracle.com with ESMTP id 31gn1ygv45-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 07 Jun 2020 16:10:56 +0000 Received: from abhmp0003.oracle.com (abhmp0003.oracle.com [141.146.116.9]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 057GAkGL025870; Sun, 7 Jun 2020 16:10:46 GMT MIME-Version: 1.0 Message-ID: <600300ac-8d00-46ef-881c-f7507c6534ca@default> Date: Sun, 7 Jun 2020 09:10:43 -0700 (PDT) From: Drew Adams <drew.adams@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN>, =?iso-8859-1?B?U2ltZW4gSGVnZ2VzdPh5bA==?= <simenheg@HIDDEN> Subject: RE: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <87pnabfdr5.fsf@simenheg@HIDDEN> <831rmr7xzz.fsf@HIDDEN> In-Reply-To: <831rmr7xzz.fsf@HIDDEN> X-Priority: 3 X-Mailer: Oracle Beehive Extensions for Outlook 2.0.1.9.1 (1003210) [OL 16.0.5005.0 (x86)] Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9645 signatures=668680 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=0 mlxscore=0 phishscore=0 adultscore=0 bulkscore=0 malwarescore=0 mlxlogscore=824 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006070123 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9645 signatures=668680 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 priorityscore=1501 lowpriorityscore=0 impostorscore=0 cotscore=-2147483648 suspectscore=0 spamscore=0 bulkscore=0 malwarescore=0 phishscore=0 mlxscore=0 mlxlogscore=851 clxscore=1011 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006070124 X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 41544 Cc: rcopley@HIDDEN, mattiase@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > There are two main factors here on which we have no control: > the subjective differences between color perception by different > people, and variations in how different terminals and displays show > the same colors. +1.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
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s=corp-2020-01-29; bh=n3EfIIw++7jps+FQFmopWCOyPhRRDeAs//GmThRRS5s=; b=y+pWIjGdvXhYS4lPss5oym+HkLN8VgGvarBy0TqSoh+jYkxnNop2oCQmWYnodoc+IQnU sn5s5GNHBw5fBTSnXGqMZ1RrAqNJKg0uL3qj38ba8GErtJdgkyNSka7tCcc+xExsjP+Z 7venskQtJ3sM2L9A6r6gNMuQd/S2dLjTYX85uuiBJMdL0LOjBhMe3AdXtrTaJDf/Foi6 yC5iYopoWAEnXZr/onh22KVEVLPbG7fwCsQ+J7tOlMxBOwtCr35ZqxJzcyyUC1tuOiQR wvRGeF+5l7LPYwamxkJwAwCeYMhNqyAXgkiUXtjh3UrNrHN44VTYL3e3VoGFomyMtNG0 Hg== Received: from aserp3030.oracle.com (aserp3030.oracle.com [141.146.126.71]) by userp2120.oracle.com with ESMTP id 31g3smkhdb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Sun, 07 Jun 2020 16:00:40 +0000 Received: from pps.filterd (aserp3030.oracle.com [127.0.0.1]) by aserp3030.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 057FvrxU185553; Sun, 7 Jun 2020 16:00:40 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserp3030.oracle.com with ESMTP id 31gmqk20up-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sun, 07 Jun 2020 16:00:39 +0000 Received: from abhmp0003.oracle.com (abhmp0003.oracle.com [141.146.116.9]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 057G0caN021034; Sun, 7 Jun 2020 16:00:38 GMT MIME-Version: 1.0 Message-ID: <93fdabf1-f725-4e8c-a9de-8e4c61ff7973@default> Date: Sun, 7 Jun 2020 09:00:34 -0700 (PDT) From: Drew Adams <drew.adams@HIDDEN> To: =?iso-8859-1?B?TWF0dGlhcyBFbmdkZWflcmQ=?= <mattiase@HIDDEN> Subject: RE: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <b4cbf0a8-d59a-4e8c-a8cf-a8df090f36bf@default> <5AEB442C-5592-46E4-BC38-185BA9D2D956@HIDDEN> In-Reply-To: <5AEB442C-5592-46E4-BC38-185BA9D2D956@HIDDEN> X-Priority: 3 X-Mailer: Oracle Beehive Extensions for Outlook 2.0.1.9.1 (1003210) [OL 16.0.5005.0 (x86)] Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9645 signatures=668680 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 phishscore=0 bulkscore=0 mlxscore=0 mlxlogscore=999 adultscore=0 spamscore=0 suspectscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006070122 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9645 signatures=668680 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 priorityscore=1501 lowpriorityscore=0 impostorscore=0 cotscore=-2147483648 suspectscore=0 spamscore=0 bulkscore=0 malwarescore=0 phishscore=0 mlxscore=0 mlxlogscore=999 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2004280000 definitions=main-2006070121 X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 41544 Cc: Eli Zaretskii <eliz@HIDDEN>, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > > +(defun color-dark-p (rgb) > > + "Whether RGB is more readable against white than black. > > +RGB is a 3-element list (R G B), each component in the range [0,1]." >=20 > > The predicate name suggests it's about testing a > > color (via RGB) to determine whether it's dark or > > light. > > > > The doc string suggests it's specifically about > > the readability of _foreground_ text that is of > > that color - specifically whether it's more > > readable against a white than a black background. >=20 > Thank you, this actually raises a good point. >=20 > The predicate should work with the argument both as a foreground and as a > background colour, for selecting a black or white contrasting colour. The > assumption is that the same predicate can be used for both, which may be > wrong, but absent evidence to the contrary, I think it is a reasonable on= e to > make. >=20 > If you are in doubt, see if you can come up with a colour for which it do= es > not hold. For example, if you find a rare shade of beige that when used f= or > text looks better against a white background, but when used as a backgrou= nd > prefers black text. I have yet to do so, much less been able to articulat= e it > formally as an algorithm. >=20 > I agree that this could be stated more explicitly in the doc string. 1. Please do consider stating the behavior more explicitly in the doc. 2. I don't have any special knowledge or suggestion about whether the same criteria should be used for light and dark foreground/background. I'd think that the comparison would need to use the complement of the foreground or background, a priori. E.g. if a background is 90% light then what works as a "readable" dark foreground would lead to a light foreground that is more or less similarly "readable" when against a 90% dark background. ___ In my own work, when I supply a default foreground or background for a face, I typically do this: I start with a light background (my own setup uses LightBlue - somewhat light), and I pick a color that seems reasonable enough for the foreground default - by eyeball. Then I check it against the default (emacs -Q) background - again, by eyeball. Once I've picked a default foreground color for a light `background-mode', I take its complement (using `hexrgb.el') as the default foreground for a dark background. I check that with emacs -Q. (I use a light background in my setup, and I don't spend a lot of energy trying to get a great default for a dark background.) In my experience (feedback from users), complementing works pretty well. And since, in my setup, I use a background that's only somewhat light, it gives a pretty good idea of what works (according to my eyes) for a complemented (hence somewhat dark) background. No idea whether any of this info helps you, but it's what I do. I don't use color-distance in this endeavor.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 7 Jun 2020 14:30:19 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Jun 07 10:30:19 2020 Received: from localhost ([127.0.0.1]:54588 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jhwJX-0005gP-DG for submit <at> debbugs.gnu.org; Sun, 07 Jun 2020 10:30:19 -0400 Received: from eggs.gnu.org ([209.51.188.92]:52800) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1jhwJV-0005gA-Pz for 41544 <at> debbugs.gnu.org; Sun, 07 Jun 2020 10:30:18 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:52335) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1jhwJQ-0004Ze-H3; Sun, 07 Jun 2020 10:30:12 -0400 Received: from [176.228.60.248] (port=3624 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1jhwJM-0003wP-GT; Sun, 07 Jun 2020 10:30:11 -0400 Date: Sun, 07 Jun 2020 17:30:04 +0300 Message-Id: <83zh9f6j9v.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <5AEB442C-5592-46E4-BC38-185BA9D2D956@HIDDEN> (message from Mattias =?utf-8?Q?Engdeg=C3=A5rd?= on Sun, 7 Jun 2020 11:13:01 +0200) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <b4cbf0a8-d59a-4e8c-a8cf-a8df090f36bf@default> <5AEB442C-5592-46E4-BC38-185BA9D2D956@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -1.4 (-) X-Debbugs-Envelope-To: 41544 Cc: 41544 <at> debbugs.gnu.org, drew.adams@HIDDEN X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -2.4 (--) > From: Mattias Engdegård <mattiase@HIDDEN> > Date: Sun, 7 Jun 2020 11:13:01 +0200 > Cc: Eli Zaretskii <eliz@HIDDEN>, 41544 <at> debbugs.gnu.org > > The predicate should work with the argument both as a foreground and as a background colour, for selecting a black or white contrasting colour. The assumption is that the same predicate can be used for both, which may be wrong, but absent evidence to the contrary, I think it is a reasonable one to make. IME, it is unreasonable to assume that a pair of colors will be perceived as "contrasting enough" no matter which of them is foreground and which background. Background colors affect larger portions of display, and therefore a bright background is perceived as brighter and a dark background as darker, than when the same color is used as foreground.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 7 Jun 2020 14:26:56 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Jun 07 10:26:55 2020 Received: from localhost ([127.0.0.1]:54579 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jhwGF-0005Zl-KF for submit <at> debbugs.gnu.org; Sun, 07 Jun 2020 10:26:55 -0400 Received: from eggs.gnu.org ([209.51.188.92]:52206) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1jhwGE-0005ZX-GN for 41544 <at> debbugs.gnu.org; Sun, 07 Jun 2020 10:26:54 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:52282) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1jhwG8-00046V-DJ; Sun, 07 Jun 2020 10:26:48 -0400 Received: from [176.228.60.248] (port=3419 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1jhwG6-0006tM-Gy; Sun, 07 Jun 2020 10:26:47 -0400 Date: Sun, 07 Jun 2020 17:26:40 +0300 Message-Id: <831rmr7xzz.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Simen =?iso-8859-1?Q?Heggest=F8yl?= <simenheg@HIDDEN> In-Reply-To: <87pnabfdr5.fsf@simenheg@HIDDEN> (message from Simen =?iso-8859-1?Q?Heggest=F8yl?= on Sun, 07 Jun 2020 11:04:30 +0200) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> <87pnabfdr5.fsf@simenheg@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Spam-Score: -1.4 (-) X-Debbugs-Envelope-To: 41544 Cc: rcopley@HIDDEN, mattiase@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -2.4 (--) > From: Simen Heggestøyl <simenheg@HIDDEN> > Cc: Mattias Engdegård <mattiase@HIDDEN>, Richard Copley > <rcopley@HIDDEN>, 41544 <at> debbugs.gnu.org > Date: Sun, 07 Jun 2020 11:04:30 +0200 > > I can't comment on the patch overall, but this part at least seems to > address Richard Copley's complaints in bug#30295. A dark foreground is > now used for #0f0/rgba(0,255,0,0.5) and #5e5 as Richard requested, which > indeed looks more readable to me too. > > Maybe the pendulum has swung too far however. For instance, a dark > foreground is now used for #ef716e, which I think was easier to read > with the light foreground used before. Could that be fixed by tweaking > the cut-off values in color-dark-p, perhaps? We can (and did) tweak the various constants involved in this, more than once. The lesson I took from that is that we could never produce something that will fit all the needs, let alone satisfy all the users. There are two main factors here on which we have no control: the subjective differences between color perception by different people, and variations in how different terminals and displays show the same colors. That is why I object to making changes in this low-level functionality with the motivation of "fixing them all": I think it's simply impossible. We will make it slightly better in some situations and slightly worse in others. There's no net win here.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
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Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance
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Content preview: 7 juni 2020 kl. 11.04 skrev Simen Heggestøyl <simenheg@HIDDEN>:
> I can't comment on the patch overall, but this part at least seems to >
address Richard Copley's complaints in bug#30295. A dark foreground is >
now used for #0f0/rgba(0,255,0,0.5) and #5e5 as Richa [...]
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7 juni 2020 kl. 11.04 skrev Simen Heggest=C3=B8yl <simenheg@HIDDEN>:
> I can't comment on the patch overall, but this part at least seems to
> address Richard Copley's complaints in bug#30295. A dark foreground is
> now used for #0f0/rgba(0,255,0,0.5) and #5e5 as Richard requested, =
which
> indeed looks more readable to me too.
Thank you, and yes, this was actually one of the motivations.
> Maybe the pendulum has swung too far however. For instance, a dark
> foreground is now used for #ef716e, which I think was easier to read
> with the light foreground used before. Could that be fixed by tweaking
> the cut-off values in color-dark-p, perhaps?
Right; the current predicate should be a significant overall improvement =
but there are inevitably some colours where the decision isn't quite =
right. I'll see what can be done about it. It seems to be mainly those =
somewhat reddish colours that need some work.
Perhaps you could try list-colours-display and see if you can spot a =
pattern?
I'll be back with a longer reply on the principles later.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 7 Jun 2020 09:13:29 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Jun 07 05:13:29 2020 Received: from localhost ([127.0.0.1]:53301 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jhrMi-0003py-0x for submit <at> debbugs.gnu.org; Sun, 07 Jun 2020 05:13:29 -0400 Received: from mail1452c50.megamailservers.eu ([91.136.14.52]:55370 helo=mail266c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <mattiase@HIDDEN>) id 1jhrMe-0003pe-KG for 41544 <at> debbugs.gnu.org; Sun, 07 Jun 2020 05:13:14 -0400 X-Authenticated-User: mattiase@HIDDEN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1591521185; bh=ad0x7GweSYEUi4Vg+4WmH0UGicKq4vEERx2Xbjf9UbQ=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=gTXE1eHV+fs+0L60t83PoHMepBTdcuMsgeWcas1JmzJiTL/xRI5NKiho31yctuxvh yYPWL59R+eGQLnvSTZNcvf+0PhF+MfkbmTp5Y6UG3VqJ+ghQEPnDyINk+HE7emp7r/ Ki3pf+e4J+h95+fQ55yKaozvnNWJRjf6HONcwa7E= Feedback-ID: mattiase@HIDDEN Received: from stanniol.lan (c-4e4ae655.032-75-73746f71.bbcust.telenor.se [85.230.74.78]) (authenticated bits=0) by mail266c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 0579D1x6012431; Sun, 7 Jun 2020 09:13:04 +0000 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.14\)) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN> X-Priority: 3 In-Reply-To: <b4cbf0a8-d59a-4e8c-a8cf-a8df090f36bf@default> Date: Sun, 7 Jun 2020 11:13:01 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <5AEB442C-5592-46E4-BC38-185BA9D2D956@HIDDEN> References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <b4cbf0a8-d59a-4e8c-a8cf-a8df090f36bf@default> To: Drew Adams <drew.adams@HIDDEN> X-Mailer: Apple Mail (2.3445.104.14) X-CTCH-RefID: str=0001.0A782F23.5EDCAF25.0023:SCFSTAT68638221, ss=1, re=-4.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: -4.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=A5MSwJeG c=1 sm=1 tr=0 a=klNLuyVZdLUgl+K5Uafb2A==:117 a=klNLuyVZdLUgl+K5Uafb2A==:17 a=kj9zAlcOel0A:10 a=M51BFTxLslgA:10 a=yPCof4ZbAAAA:8 a=iLj94LE5IQj3-QTxvVkA:9 a=CjuIK1q_8ugA:10 X-Spam-Score: 1.2 (+) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: 6 juni 2020 kl. 20.15 skrev Drew Adams <drew.adams@HIDDEN>: > +(defun color-dark-p (rgb) > + "Whether RGB is more readable against white than black. > +RGB is a 3-element list (R G B), each component in the range [0,1]." Content analysis details: (1.2 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [URIs: megamailservers.eu] 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.3 KHOP_HELO_FCRDNS Relay HELO differs from its IP's reverse DNS X-Debbugs-Envelope-To: 41544 Cc: Eli Zaretskii <eliz@HIDDEN>, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.0 (/) 6 juni 2020 kl. 20.15 skrev Drew Adams <drew.adams@HIDDEN>: > +(defun color-dark-p (rgb) > + "Whether RGB is more readable against white than black. > +RGB is a 3-element list (R G B), each component in the range [0,1]." > The predicate name suggests it's about testing a > color (via RGB) to determine whether it's dark or > light. >=20 > The doc string suggests it's specifically about > the readability of _foreground_ text that is of > that color - specifically whether it's more > readable against a white than a black background. Thank you, this actually raises a good point. The predicate should work with the argument both as a foreground and as = a background colour, for selecting a black or white contrasting colour. = The assumption is that the same predicate can be used for both, which = may be wrong, but absent evidence to the contrary, I think it is a = reasonable one to make. If you are in doubt, see if you can come up with a colour for which it = does not hold. For example, if you find a rare shade of beige that when = used for text looks better against a white background, but when used as = a background prefers black text. I have yet to do so, much less been = able to articulate it formally as an algorithm. I agree that this could be stated more explicitly in the doc string.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 7 Jun 2020 09:04:36 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sun Jun 07 05:04:36 2020 Received: from localhost ([127.0.0.1]:53296 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jhrEK-0003aO-5O for submit <at> debbugs.gnu.org; Sun, 07 Jun 2020 05:04:36 -0400 Received: from aibo.runbox.com ([91.220.196.211]:38770) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <simenheg@HIDDEN>) id 1jhrEH-0003aD-VJ for 41544 <at> debbugs.gnu.org; Sun, 07 Jun 2020 05:04:35 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=runbox.com; s=selector1; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From; bh=i2bPAZIn58UZ7lWpLe3yIawPjlzsnUqTxJWqGncpfEI=; b=Akon/NWL9Zm8rmV2i97yIvARrc KKeyimA7T/4aQuzuc5ESG2adUnrB6Uf/ZU9uLuo4NXxd5uO5ZDi170HOEPIlQJFlqKcOPakh59BbR P/URyC48UvtX+nqWnYgPLWdbNNai2eYfifZV4xnTdHrF5za42Gcbhum8peMX4K/6udCPHm3q26jKr CnuDtOLGS6wLGeqfHYZv6+XPeybYLfcoY646KWCzUq7G9YjX4i3sVy0loKMeQbhwmfgt6at+1dG6j T/sqPFT5QsV028Ot/TdalRL9Uk7Luum8dFjF3rEWThdyqPxLo2xKbP0E0lbJ1oJL3MSswMTHckkIU oy52714A==; Received: from [10.9.9.73] (helo=submission02.runbox) by mailtransmit03.runbox with esmtp (Exim 4.86_2) (envelope-from <simenheg@HIDDEN>) id 1jhrEF-0001PO-9l; Sun, 07 Jun 2020 11:04:31 +0200 Received: by submission02.runbox with esmtpsa [Authenticated alias (963757)] (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) id 1jhrEF-0000hE-67; Sun, 07 Jun 2020 11:04:31 +0200 From: =?utf-8?Q?Simen_Heggest=C3=B8yl?= <simenheg@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> <83bllw82xt.fsf@HIDDEN> Date: Sun, 07 Jun 2020 11:04:30 +0200 In-Reply-To: <83bllw82xt.fsf@HIDDEN> (Eli Zaretskii's message of "Sat, 06 Jun 2020 21:27:42 +0300") Message-ID: <87pnabfdr5.fsf@simenheg@HIDDEN> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/27.0.91 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-Spam-Score: 0.3 (/) X-Debbugs-Envelope-To: 41544 Cc: Richard Copley <rcopley@HIDDEN>, Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN>, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.7 (/) Eli Zaretskii <eliz@HIDDEN> writes: >> -(defun css--contrasty-color (name) >> - "Return a color that contrasts with NAME. >> -NAME is of any form accepted by `color-distance'. >> -The returned color will be usable by Emacs and will contrast >> -with NAME; in particular so that if NAME is used as a background >> -color, the returned color can be used as the foreground and still >> -be readable." >> - ;; See bug#25525 for a discussion of this. >> - (if (> (color-distance name "black") 292485) >> - "black" "white")) >> - >> (defcustom css-fontify-colors t >> "Whether CSS colors should be fontified using the color as the background. >> When non-`nil', a text representing CSS color will be fontified >> @@ -1199,7 +1188,8 @@ css--fontify-region >> (add-text-properties >> start (point) >> (list 'face (list :background color >> - :foreground (css--contrasty-color color) >> + :foreground (readable-foreground-color >> + color) >> :box '(:line-width -1)))))))))))) >> extended-region)) > > Here, once again I will ask what practical problem is being fixed. I can't comment on the patch overall, but this part at least seems to address Richard Copley's complaints in bug#30295. A dark foreground is now used for #0f0/rgba(0,255,0,0.5) and #5e5 as Richard requested, which indeed looks more readable to me too. Maybe the pendulum has swung too far however. For instance, a dark foreground is now used for #ef716e, which I think was easier to read with the light foreground used before. Could that be fixed by tweaking the cut-off values in color-dark-p, perhaps? -- Simen
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 6 Jun 2020 18:28:03 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Jun 06 14:28:03 2020 Received: from localhost ([127.0.0.1]:52451 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jhdY3-0007EV-7F for submit <at> debbugs.gnu.org; Sat, 06 Jun 2020 14:28:03 -0400 Received: from eggs.gnu.org ([209.51.188.92]:51438) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1jhdY1-0007Dp-4t for 41544 <at> debbugs.gnu.org; Sat, 06 Jun 2020 14:28:01 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:36188) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1jhdXv-0002o3-TR; Sat, 06 Jun 2020 14:27:55 -0400 Received: from [176.228.60.248] (port=1972 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1jhdXr-0001xZ-W0; Sat, 06 Jun 2020 14:27:53 -0400 Date: Sat, 06 Jun 2020 21:27:42 +0300 Message-Id: <83bllw82xt.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> (message from Mattias =?utf-8?Q?Engdeg=C3=A5rd?= on Sat, 6 Jun 2020 18:54:41 +0200) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 41544 Cc: 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > From: Mattias Engdegård <mattiase@HIDDEN> > Date: Sat, 6 Jun 2020 18:54:41 +0200 > Cc: 41544 <at> debbugs.gnu.org > > Since we are making little progress, let's leave color-name-to-rgb unchanged for the moment. We can both change our minds later. It's not strictly required for the introduction and use of color-dark-p; patch updated. What practical problem is being solved here? (Please don't say "this was done in different ways", that's not a practical problem from my POV.) > * lisp/facemenu.el (list-colors-print): Use readable-foreground-color. I don't mind installing this part, but have the rationale should be spelled out in the log message. > --- a/lisp/faces.el > +++ b/lisp/faces.el > @@ -1786,15 +1786,24 @@ defined-colors-with-face-attributes > > (defun readable-foreground-color (color) > "Return a readable foreground color for background COLOR." > - (let* ((rgb (color-values color)) > - (max (apply #'max rgb)) > - (black (car (color-values "black"))) > - (white (car (color-values "white")))) > - ;; Select black or white depending on which one is less similar to > - ;; the brightest component. > - (if (> (abs (- max black)) (abs (- max white))) > - "black" > - "white"))) What was wrong with the original code? If it produced sub-optimal results, please show an example of that. > +(defun color-dark-p (rgb) > + "Whether RGB is more readable against white than black. > +RGB is a 3-element list (R G B), each component in the range [0,1]." > + (let* ((sr (nth 0 rgb)) > + (sg (nth 1 rgb)) > + (sb (nth 2 rgb)) > + ;; Use the power 2.2 as an approximation to sRGB gamma; > + ;; it should be good enough for the purpose of this function. > + (r (expt sr 2.2)) > + (g (expt sg 2.2)) > + (b (expt sb 2.2))) > + (unless (<= 0 (min r g b) (max r g b) 1) > + (error "RGB components %S not in [0,1]" rgb)) > + ;; The cut-off value was determined experimentally; see bug#41544. > + (< (+ (* r 0.299) (* g 0.587) (* b 0.114)) > + (eval-when-compile (expt 0.6 2.2))))) This code's algorithm and rationale should be explained in the comments before we can discuss whether it's an improvement and why. > diff --git a/lisp/frame.el b/lisp/frame.el > index 6c2f774709..253528da75 100644 > --- a/lisp/frame.el > +++ b/lisp/frame.el > @@ -1156,6 +1156,13 @@ frame-background-mode This is a non-starter, sorry. I'm not interested in changing what is considered dark and light background of a frame. > diff --git a/lisp/term/rxvt.el b/lisp/term/rxvt.el > index 31e3d6ede4..5dc754c8e0 100644 > --- a/lisp/term/rxvt.el > +++ b/lisp/term/rxvt.el > @@ -206,13 +206,11 @@ rxvt-set-background-mode Likewise here. > diff --git a/lisp/term/w32console.el b/lisp/term/w32console.el > index 36e9d896c7..0e9d7c8b5c 100644 > --- a/lisp/term/w32console.el > +++ b/lisp/term/w32console.el > @@ -86,9 +86,9 @@ terminal-init-w32console > (setq r (nth 2 descr) > g (nth 3 descr) > b (nth 4 descr)) > - (if (< (+ r g b) (* .6 (+ 65535 65535 65535))) > - (setq bg-mode 'dark) > - (setq bg-mode 'light)) > + (setq bg-mode (if (color-dark-p > + (list (/ r 65535.0) (/ g 65535.0) (/ b 65535.0))) > + 'dark 'light)) > (set-terminal-parameter nil 'background-mode bg-mode)) And here. > diff --git a/lisp/term/xterm.el b/lisp/term/xterm.el > index 1a727e3933..bf9bcae526 100644 > --- a/lisp/term/xterm.el > +++ b/lisp/term/xterm.el > @@ -1120,9 +1120,8 @@ xterm-register-default-colors > (clear-face-cache))) > > (defun xterm-maybe-set-dark-background-mode (redc greenc bluec) > - ;; Use the heuristic in `frame-set-background-mode' to decide if a > - ;; frame is dark. > - (when (< (+ redc greenc bluec) (* .6 (+ 65535 65535 65535))) > + (when (color-dark-p (mapcar (lambda (c) (/ c 65535.0)) > + (list redc greenc bluec))) > (set-terminal-parameter nil 'background-mode 'dark) And here. > -(defun css--contrasty-color (name) > - "Return a color that contrasts with NAME. > -NAME is of any form accepted by `color-distance'. > -The returned color will be usable by Emacs and will contrast > -with NAME; in particular so that if NAME is used as a background > -color, the returned color can be used as the foreground and still > -be readable." > - ;; See bug#25525 for a discussion of this. > - (if (> (color-distance name "black") 292485) > - "black" "white")) > - > (defcustom css-fontify-colors t > "Whether CSS colors should be fontified using the color as the background. > When non-`nil', a text representing CSS color will be fontified > @@ -1199,7 +1188,8 @@ css--fontify-region > (add-text-properties > start (point) > (list 'face (list :background color > - :foreground (css--contrasty-color color) > + :foreground (readable-foreground-color > + color) > :box '(:line-width -1)))))))))))) > extended-region)) Here, once again I will ask what practical problem is being fixed. Thanks.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 6 Jun 2020 18:16:15 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Jun 06 14:16:15 2020 Received: from localhost ([127.0.0.1]:52425 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jhdMc-0006wO-Oy for submit <at> debbugs.gnu.org; Sat, 06 Jun 2020 14:16:14 -0400 Received: from aserp2120.oracle.com ([141.146.126.78]:55324) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <drew.adams@HIDDEN>) id 1jhdMb-0006vt-OY for 41544 <at> debbugs.gnu.org; Sat, 06 Jun 2020 14:16:14 -0400 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 056I6wkD001273; Sat, 6 Jun 2020 18:16:05 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=mime-version : message-id : date : from : sender : to : cc : subject : references : in-reply-to : content-type : content-transfer-encoding; s=corp-2020-01-29; bh=EVFa0tZNc+J1Qg4Z4I8JuUxFh2NswrWXqaSlCiCBa2k=; b=LWaX+24LOOz7WZDVkZThoqYLbqQBubJTtlu6/lLHg4ZSawrdQ8DRCkqQV/HqrRU45x48 muOcSzBITmaKYyuuj2TGm54LCT5/bOikqLEw2kP+JxdnzY20S5UGB8M9SUyRR5+gjsJq tsnlld9AUaDufU9q0aGXaZn4zpxCRKR8HQvEu2WNtjZ/iYSup82kkWhc0KAUG93nIzSN iJXtlWxEE8eE6jbBRMxJgaZu/BsJuYFPHdm6PnBAXy0ShCy0XpFW4iZtkxmg7pijDsGv tabXfWdXRvwY3fE09lpiOt4AYn2kQZZczU9IbAgL4X7Ve9z2FZmvl4JJohbYyKote6hN 9g== Received: from userp3020.oracle.com (userp3020.oracle.com [156.151.31.79]) by aserp2120.oracle.com with ESMTP id 31g33ksksn-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Sat, 06 Jun 2020 18:16:05 +0000 Received: from pps.filterd (userp3020.oracle.com [127.0.0.1]) by userp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 056I8FXo146440; Sat, 6 Jun 2020 18:16:04 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by userp3020.oracle.com with ESMTP id 31g2fhh522-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Sat, 06 Jun 2020 18:16:04 +0000 Received: from abhmp0011.oracle.com (abhmp0011.oracle.com [141.146.116.17]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 056IG0KJ015542; Sat, 6 Jun 2020 18:16:01 GMT MIME-Version: 1.0 Message-ID: <b4cbf0a8-d59a-4e8c-a8cf-a8df090f36bf@default> Date: Sat, 6 Jun 2020 11:15:57 -0700 (PDT) From: Drew Adams <drew.adams@HIDDEN> To: =?iso-8859-1?B?TWF0dGlhcyBFbmdkZWflcmQ=?= <mattiase@HIDDEN>, Eli Zaretskii <eliz@HIDDEN> Subject: RE: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> <83img48ffx.fsf@HIDDEN> <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> In-Reply-To: <EAD39303-6870-4E5F-8D3B-4B4DE29AD57B@HIDDEN> X-Priority: 3 X-Mailer: Oracle Beehive Extensions for Outlook 2.0.1.9.1 (1003210) [OL 16.0.5005.0 (x86)] Content-Type: text/plain; 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apologies.) Noticed this in the patch: +(defun color-dark-p (rgb) + "Whether RGB is more readable against white than black. +RGB is a 3-element list (R G B), each component in the range [0,1]." Something seems a bit wrong, here. Dunno whether it's the predicate name or the doc string (or both). The predicate name suggests it's about testing a color (via RGB) to determine whether it's dark or light. The doc string suggests it's specifically about the readability of _foreground_ text that is of that color - specifically whether it's more readable against a white than a black background. Maybe the predicate name should be changed to indicate (1) that it's about RGB as a foreground and (2) it's compared (in terms of contrast or value or whatever) to a white and black background. Just a suggestion. Discovery, based on the predicate name, will mislead as it is now, I think. I also think the doc string could say just what it means by "more readable", i.e. what kind of RGB (or other) test it uses.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
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Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance
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Content preview: 6 juni 2020 kl. 15.57 skrev Eli Zaretskii <eliz@HIDDEN>:
>> can you come up with a concrete and realistic example of what you think
will break? > > None at this time. That's high praise!
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6 juni 2020 kl. 15.57 skrev Eli Zaretskii <eliz@HIDDEN>:
>> can you come up with a concrete and realistic example of what you =
think will break?
>=20
> None at this time.
That's high praise!
> I think a Lisp program that interprets the documentation too
> literally is making a mistake
I must remember that, a most useful answer!
> , but I'm not opposed to make that
> clearer in the docs.
No, I really don't think we should document the bug.
Since we are making little progress, let's leave color-name-to-rgb =
unchanged for the moment. We can both change our minds later. It's not =
strictly required for the introduction and use of color-dark-p; patch =
updated.
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--Apple-Mail=_DB782CBA-D227-410A-B6EF-143B5FD5022B--
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 6 Jun 2020 13:57:55 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Jun 06 09:57:55 2020 Received: from localhost ([127.0.0.1]:52251 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jhZKd-00073h-Ep for submit <at> debbugs.gnu.org; Sat, 06 Jun 2020 09:57:55 -0400 Received: from eggs.gnu.org ([209.51.188.92]:57668) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1jhZKb-00073T-NT for 41544 <at> debbugs.gnu.org; Sat, 06 Jun 2020 09:57:53 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:60550) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1jhZKW-0005o0-4R; Sat, 06 Jun 2020 09:57:48 -0400 Received: from [176.228.60.248] (port=4660 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1jhZKU-0004n0-GX; Sat, 06 Jun 2020 09:57:47 -0400 Date: Sat, 06 Jun 2020 16:57:38 +0300 Message-Id: <83img48ffx.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> (message from Mattias =?utf-8?Q?Engdeg=C3=A5rd?= on Sat, 6 Jun 2020 15:29:31 +0200) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 41544 Cc: 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > From: Mattias Engdegård <mattiase@HIDDEN> > Date: Sat, 6 Jun 2020 15:29:31 +0200 > Cc: 41544 <at> debbugs.gnu.org > > 6 juni 2020 kl. 13.59 skrev Eli Zaretskii <eliz@HIDDEN>: > > > I have already pointed out the negative consequences: the fix you > > proposed changes the behavior and return values of a low-level API > > that is used in many places, both directly and indirectly. Thus, it > > runs a high risk of producing bugs and breaking code that works well > > enough now. > > This is very speculative and hypothetical. Forgive me for being sceptical, but can you come up with a concrete and realistic example of what you think will break? None at this time. But bitter experience has taught me that they will almost certainly come. They always do. > > My assumption is that making changes for purely academic and/or > > aesthetic reasons is something that we should avoid. > > That is a rather disparaging way of referring to fixes intended to make code working as advertised. If the problem is that the documentation doesn't match the behavior, it is much easier for me to agree to amend the documentation. In this case, I think a Lisp program that interprets the documentation too literally is making a mistake, but I'm not opposed to make that clearer in the docs. > > I don't even understand what each paragraph above tries to say, and/or > > with what argument of mine it attempts to argue. > > You were saying that #ffffffffffff is as good an approximation as any other, and I was showing that it's not. Then I'm not convinced, sorry. > > Specifically, what is there that is the current state of affairs, what > > is that _should_be_ the state of affairs > > The current state of affairs is that 'color-values' returns an incorrect value in certain cases. This can be fixed by making the code simpler and more robust. We've made a full circle: I was talking about the effects on the callers of color-values and color-name-to-rgb, and explicitly asked that we don't limit ourselves to these functions alone. If there are no problems caused to the callers of these functions, then I think we should leave the code alone.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 6 Jun 2020 13:29:41 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Jun 06 09:29:41 2020 Received: from localhost ([127.0.0.1]:51068 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jhYtJ-0003wI-B2 for submit <at> debbugs.gnu.org; Sat, 06 Jun 2020 09:29:41 -0400 Received: from mail157c50.megamailservers.eu ([91.136.10.167]:51618 helo=mail51c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <mattiase@HIDDEN>) id 1jhYtE-0003w7-DF for 41544 <at> debbugs.gnu.org; Sat, 06 Jun 2020 09:29:40 -0400 X-Authenticated-User: mattiase@HIDDEN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1591450174; bh=Q7L2t01bzD0Gp9w1YwDcKsQOepa8E7GDWP8E9rDiShg=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=Ijug6IQocfRjcN3FQHaCwokrEyd51NhWfwgnsytsnw8J6gXSH05eGKM4hKRgoa92K PH03gPEbKm9YBqoJmJT3QPUfXWRepb4S4+7e0FZ5eMFA4N+SykUjpUcvIV2vS2YUAO B/2BUJiUseiN2ZcjZXYCt4GCXDCluU5GhjTwhqKM= Feedback-ID: mattiase@HIDDEN Received: from stanniol.lan (c-4e4ae655.032-75-73746f71.bbcust.telenor.se [85.230.74.78]) (authenticated bits=0) by mail51c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 056DTWI6030485; Sat, 6 Jun 2020 13:29:33 +0000 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.14\)) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <83r1us8kw6.fsf@HIDDEN> Date: Sat, 6 Jun 2020 15:29:31 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <020DE875-14A8-457A-9AE4-AA0925DB8997@HIDDEN> References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> <83r1us8kw6.fsf@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> X-Mailer: Apple Mail (2.3445.104.14) X-CTCH-RefID: str=0001.0A782F23.5EDB99C4.000C:SCFSTAT68638221, ss=1, re=-4.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: -4.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=MOMeZ/Rl c=1 sm=1 tr=0 a=klNLuyVZdLUgl+K5Uafb2A==:117 a=klNLuyVZdLUgl+K5Uafb2A==:17 a=kj9zAlcOel0A:10 a=M51BFTxLslgA:10 a=mDV3o1hIAAAA:8 a=IwwuGxysOwN4sJXSbG8A:9 a=CjuIK1q_8ugA:10 a=_FVE-zBwftR9WsbkzFJk:22 X-Spam-Score: 1.2 (+) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: 6 juni 2020 kl. 13.59 skrev Eli Zaretskii <eliz@HIDDEN>: > I have already pointed out the negative consequences: the fix you > proposed changes the behavior and return values of a low-level API > that is used in many places, both directly and indirectly. Th [...] Content analysis details: (1.2 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [URIs: gnu.org] 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.3 KHOP_HELO_FCRDNS Relay HELO differs from its IP's reverse DNS X-Debbugs-Envelope-To: 41544 Cc: 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.0 (/) 6 juni 2020 kl. 13.59 skrev Eli Zaretskii <eliz@HIDDEN>: > I have already pointed out the negative consequences: the fix you > proposed changes the behavior and return values of a low-level API > that is used in many places, both directly and indirectly. Thus, it > runs a high risk of producing bugs and breaking code that works well > enough now. This is very speculative and hypothetical. Forgive me for being = sceptical, but can you come up with a concrete and realistic example of = what you think will break? > That is, assuming we are still talking about the last patch you > posted in this matter. We were specifically talking about fixing the bug in color-name-to-rgb, = I believe. It is subordinate to the main change, which we have not = discussed at all. If you like, we could leave color-name-to-rgb alone, = and we will see whether the change is needed when doing the actual work = (color-dark-p). > My assumption is that making changes for purely academic and/or > aesthetic reasons is something that we should avoid. That is a rather disparaging way of referring to fixes intended to make = code working as advertised.=20 > I don't even understand what each paragraph above tries to say, and/or > with what argument of mine it attempts to argue. You were saying that #ffffffffffff is as good an approximation as any = other, and I was showing that it's not. > Specifically, what is there that is the current state of affairs, what > is that _should_be_ the state of affairs The current state of affairs is that 'color-values' returns an incorrect = value in certain cases. This can be fixed by making the code simpler and = more robust.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 6 Jun 2020 12:00:15 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Jun 06 08:00:15 2020 Received: from localhost ([127.0.0.1]:50969 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jhXUk-0001f6-QQ for submit <at> debbugs.gnu.org; Sat, 06 Jun 2020 08:00:15 -0400 Received: from eggs.gnu.org ([209.51.188.92]:48562) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1jhXUi-0001eM-GP for 41544 <at> debbugs.gnu.org; Sat, 06 Jun 2020 08:00:13 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:59478) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1jhXUd-0003iI-06; Sat, 06 Jun 2020 08:00:07 -0400 Received: from [176.228.60.248] (port=4848 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1jhXUX-0005Xp-L4; Sat, 06 Jun 2020 08:00:03 -0400 Date: Sat, 06 Jun 2020 14:59:53 +0300 Message-Id: <83r1us8kw6.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> (message from Mattias =?utf-8?Q?Engdeg=C3=A5rd?= on Sat, 6 Jun 2020 12:59:53 +0200) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 41544 Cc: 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > From: Mattias Engdegård <mattiase@HIDDEN> > Date: Sat, 6 Jun 2020 12:59:53 +0200 > Cc: 41544 <at> debbugs.gnu.org > > Thank you all the same, but I'd like to fix this bug nevertheless. It is clearly a bug, and I'm one of those writing code calling color-values and thus being affected by it. Of course, if you can show some negative consequence of the suggested fix, then some alternative has to be considered. I have already pointed out the negative consequences: the fix you proposed changes the behavior and return values of a low-level API that is used in many places, both directly and indirectly. Thus, it runs a high risk of producing bugs and breaking code that works well enough now. That is, assuming we are still talking about the last patch you posted in this matter. > Instead of replying point-for-point, which can go on forever, let's try to break the stalemate; we are clearly talking past one another. I'm trying to understand your assumptions, and hope that you will do me the same courtesy. My assumption is that making changes for purely academic and/or aesthetic reasons is something that we should avoid. Time and again such changes just introduce bugs in other places, wasting our time and scarce resources, and leaving the overall quality of Emacs is none the better. I will therefore object to any low-level changes that don't fix clear-cut practical problems in some important functionality. > The values returned from color-values are scaled to a maximum of 65535 for all Emacs displays (except NS). Just because a TTY does not have a 'white' colour with RGB values (65535 65535 65535) does not mean that the scale is somehow different. > > In the case of TERM=xterm-color, the brightest colour (confusingly named "white") is (58853 58853 58853). This doesn't mean that 58853 is the maximum colour component value; it just means that the brightest colour is not pure white but something like a 90% grey, ie (0.9 0.9 0.9) in 1-normalised RGB notation. > > The method of using (color-values "#ffffffffffff") was a clever trick for obtaining the scale factor without having to know exactly what the maximum was for that frame, since parts of Emacs had different ideas of what range to actually use: it was common for some time to convert from 8 to 16 bit/channel by shifting 8 bits to the left. I've read through bug#25890 and bug#24273, as well as poured over the change history, and it seems very clear where this came from. > > However, the back-end code appears much more robust and regular now, and the code can be simplified, as well as avoiding the irregularities occurring with TTYs lacking a pure white colour. Surely there is no harm in that? Here you again lost me, sorry. You asked for understanding of your assumptions, but I cannot glean those assumptions from the text above. I don't even understand what each paragraph above tries to say, and/or with what argument of mine it attempts to argue. Specifically, what is there that is the current state of affairs, what is that _should_be_ the state of affairs in your opinion (a.k.a. "your assumptions", I presume), and why what we have now is in your opinion so bad that we must fix it?
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 6 Jun 2020 11:00:07 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Jun 06 07:00:07 2020 Received: from localhost ([127.0.0.1]:50874 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jhWYY-0006L0-Pm for submit <at> debbugs.gnu.org; Sat, 06 Jun 2020 07:00:07 -0400 Received: from mail1444c50.megamailservers.eu ([91.136.14.44]:56372 helo=mail264c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <mattiase@HIDDEN>) id 1jhWYV-0006JX-Px for 41544 <at> debbugs.gnu.org; Sat, 06 Jun 2020 07:00:05 -0400 X-Authenticated-User: mattiase@HIDDEN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1591441197; bh=3396mviELq+yOhmgZNGLlG7HXvBLyK1Pi+qhuA0uLP0=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=RuLbfhUPbaGVBBIyROSpVvHFYUIpzAdiBvrI/x/VjrdSzJNpCEzghdRyTgLgefGiM ahgSly/5YGjihLqI2BL2p5hPFJM/O+AqzEdkWPvv5Haxn1B2fuK8So69TjZK3K6kUz mtM7v4fxESf/mxZe77DqSLnkL3SqVEg5z7vn0j4I= Feedback-ID: mattiase@HIDDEN Received: from stanniol.lan (c-4e4ae655.032-75-73746f71.bbcust.telenor.se [85.230.74.78]) (authenticated bits=0) by mail264c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 056AxsUb014456; Sat, 6 Jun 2020 10:59:56 +0000 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.14\)) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <838sh0abzz.fsf@HIDDEN> Date: Sat, 6 Jun 2020 12:59:53 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <CD510955-CF47-4F8C-9F95-C9FFF9791496@HIDDEN> References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> <838sh0abzz.fsf@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> X-Mailer: Apple Mail (2.3445.104.14) X-CTCH-RefID: str=0001.0A782F27.5EDB76CD.0044:SCFSTAT68638221, ss=1, re=-4.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: -4.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=PPNxBsiC c=1 sm=1 tr=0 a=klNLuyVZdLUgl+K5Uafb2A==:117 a=klNLuyVZdLUgl+K5Uafb2A==:17 a=kj9zAlcOel0A:10 a=M51BFTxLslgA:10 a=mDV3o1hIAAAA:8 a=Ecc4TiwEbbgJAD0glIkA:9 a=CjuIK1q_8ugA:10 a=_FVE-zBwftR9WsbkzFJk:22 X-Spam-Score: 1.2 (+) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: [I've left Tom and Simon out of the CC list to spare them the noise.] 6 juni 2020 kl. 09.29 skrev Eli Zaretskii <eliz@HIDDEN>: > That in itself is not bad, IMO. When I said "in practice", I meant > practical problems this causes, and that inevitably involves some > callers of that function (and the callers of those callers) t [...] Content analysis details: (1.2 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [URIs: gnu.org] 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.3 KHOP_HELO_FCRDNS Relay HELO differs from its IP's reverse DNS X-Debbugs-Envelope-To: 41544 Cc: 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.0 (/) [I've left Tom and Simon out of the CC list to spare them the noise.] 6 juni 2020 kl. 09.29 skrev Eli Zaretskii <eliz@HIDDEN>: > That in itself is not bad, IMO. When I said "in practice", I meant > practical problems this causes, and that inevitably involves some > callers of that function (and the callers of those callers) that > suffer problems which show on display or cause incorrect decisions to > be made in specific Lisp applications. What you presented are > theoretical difficulties that IMO don't yet justify any significant > changes on this level, not by themselves. Thank you all the same, but I'd like to fix this bug nevertheless. It is = clearly a bug, and I'm one of those writing code calling color-values = and thus being affected by it. Of course, if you can show some negative = consequence of the suggested fix, then some alternative has to be = considered. Instead of replying point-for-point, which can go on forever, let's try = to break the stalemate; we are clearly talking past one another. I'm = trying to understand your assumptions, and hope that you will do me the = same courtesy. The values returned from color-values are scaled to a maximum of 65535 = for all Emacs displays (except NS). Just because a TTY does not have a = 'white' colour with RGB values (65535 65535 65535) does not mean that = the scale is somehow different. In the case of TERM=3Dxterm-color, the brightest colour (confusingly = named "white") is (58853 58853 58853). This doesn't mean that 58853 is = the maximum colour component value; it just means that the brightest = colour is not pure white but something like a 90% grey, ie (0.9 0.9 0.9) = in 1-normalised RGB notation. The method of using (color-values "#ffffffffffff") was a clever trick = for obtaining the scale factor without having to know exactly what the = maximum was for that frame, since parts of Emacs had different ideas of = what range to actually use: it was common for some time to convert from = 8 to 16 bit/channel by shifting 8 bits to the left. I've read through = bug#25890 and bug#24273, as well as poured over the change history, and = it seems very clear where this came from. However, the back-end code appears much more robust and regular now, and = the code can be simplified, as well as avoiding the irregularities = occurring with TTYs lacking a pure white colour. Surely there is no harm = in that?
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 6 Jun 2020 07:29:31 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Sat Jun 06 03:29:31 2020 Received: from localhost ([127.0.0.1]:50584 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jhTGc-0004x9-2L for submit <at> debbugs.gnu.org; Sat, 06 Jun 2020 03:29:31 -0400 Received: from eggs.gnu.org ([209.51.188.92]:56104) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1jhTGa-0004wx-DD for 41544 <at> debbugs.gnu.org; Sat, 06 Jun 2020 03:29:20 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:57436) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1jhTGU-000176-Ai; Sat, 06 Jun 2020 03:29:14 -0400 Received: from [176.228.60.248] (port=3805 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1jhTGT-0006o1-DF; Sat, 06 Jun 2020 03:29:13 -0400 Date: Sat, 06 Jun 2020 10:29:04 +0300 Message-Id: <838sh0abzz.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> (message from Mattias =?utf-8?Q?Engdeg=C3=A5rd?= on Fri, 5 Jun 2020 17:50:47 +0200) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.1 (--) X-Debbugs-Envelope-To: 41544 Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > From: Mattias Engdegård <mattiase@HIDDEN> > Date: Fri, 5 Jun 2020 17:50:47 +0200 > Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org > > > What bad results does this issue cause in practice? > > The immediate bad result is that color-name-to-rgb returns a value that is (a) wrong and (b) outside the range of legal values for that function. Code calling it expect the value to be (a) correct and (b) within the range of legal values. That in itself is not bad, IMO. When I said "in practice", I meant practical problems this causes, and that inevitably involves some callers of that function (and the callers of those callers) that suffer problems which show on display or cause incorrect decisions to be made in specific Lisp applications. What you presented are theoretical difficulties that IMO don't yet justify any significant changes on this level, not by themselves. > > (Btw, in a GUI session I see (0.0 0.0 1.0), so no problem there.) > > Of course, but this was specifically in terminals where the colour closest to full white isn't. On such terminals we will always have a problem, because "white" (and "red" and "blue", and in fact any color specified by its name) is not well-defined. Their RGB values depend on external factors and configurations that we cannot control, like X-level configuration of the first 8 or 16 xterm colors. IOW, this problem cannot be solved in principle, and we shouldn't even try. We currently have a solution that works "well enough" for those cases, and I see no reason to make any significant changes in what we arrived at after a long journey (which started during development of Emacs 21). > >> The main problem is trusting "#ffffffffffff" to match a colour with the maximum range. > > > > Why is that a problem, given the color representation we use in Emacs? > > Because there is not always a matching (white) colour that has the maximum component value. This cannot be helped on a TTY. Using #ffffffffffff is as good an approximation as any other, and better than some which we tried in the past. I see no reason to make any changes due to this theoretical issue. > (1) We know that the maximum colour component value is 65535 or 65280, depending on the platform (display system). > (2) color-name-to-rgb needs the maximum colour component value in order to normalise the result. > (3) color-name-to-rgb currently uses (color-values "#ffffffffffff") to obtain the maximum colour component value, but it is not always correct. > (4) Instead, we can just use 65535 or 65280 right away, which is fast and always correct. This would make the result dependent on the frame, since the TTY type can be different for different frames. That would give rise to new and exciting bugs, because these APIs currently don't accept a FRAME argument (adding such an argument, while it can be made backward-compatible, will take eons to propagate to Lisp code). Again, I see no justification for such a change. If we think these minor deviations from theoretically perfect results may confuse someone, we can document these pitfalls in any number of words we see fit.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 5 Jun 2020 15:51:01 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Fri Jun 05 11:51:01 2020 Received: from localhost ([127.0.0.1]:49635 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jhEcW-0000uy-NE for submit <at> debbugs.gnu.org; Fri, 05 Jun 2020 11:51:01 -0400 Received: from mail213c50.megamailservers.eu ([91.136.10.223]:32280 helo=mail194c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <mattiase@HIDDEN>) id 1jhEcT-0000uk-G5 for 41544 <at> debbugs.gnu.org; Fri, 05 Jun 2020 11:50:59 -0400 X-Authenticated-User: mattiase@HIDDEN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1591372250; bh=6SrGCdAfxtbqzwTu91mjae0VBmB3/8RJwF/b6pOPHtI=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=FAbvCmx1vukJHA1f0MmvPdo0cY9Y+MLWB6O3xOJVdqtQFfA1EH8Rxk3Xd6LeHI3Zi LgwUZVmzTN1UGkZIsYNvPQ3WtJYFDVhQNYpyvKkPifJA7xnLURuz/tH/gcsdXb1OJF Kot2QJtHCUQU/Mmb5pLR6t/24FCRADIz+xbxKzOQ= Feedback-ID: mattiase@HIDDEN Received: from stanniol.lan (c-4e4ae655.032-75-73746f71.bbcust.telenor.se [85.230.74.78]) (authenticated bits=0) by mail194c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 055FolQo028398; Fri, 5 Jun 2020 15:50:49 +0000 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.14\)) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <835zc5bsut.fsf@HIDDEN> Date: Fri, 5 Jun 2020 17:50:47 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <3BBCFDD4-C14D-4628-91CB-2A0456A96FC7@HIDDEN> References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> <835zc5bsut.fsf@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> X-Mailer: Apple Mail (2.3445.104.14) X-CTCH-RefID: str=0001.0A782F21.5EDA6969.0073:SCFSTAT68638221, ss=1, re=-4.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: -4.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=KsozJleN c=1 sm=1 tr=0 a=klNLuyVZdLUgl+K5Uafb2A==:117 a=klNLuyVZdLUgl+K5Uafb2A==:17 a=kj9zAlcOel0A:10 a=M51BFTxLslgA:10 a=mDV3o1hIAAAA:8 a=-VOMddSL8ucwYjIa_j4A:9 a=CjuIK1q_8ugA:10 a=_FVE-zBwftR9WsbkzFJk:22 X-Spam-Score: 1.0 (+) X-Debbugs-Envelope-To: 41544 Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.0 (/) 5 juni 2020 kl. 14.27 skrev Eli Zaretskii <eliz@HIDDEN>: > There's some history to that: see bug#25890. Thank you very much, that certainly gives some historical perspective! > What bad results does this issue cause in practice? The immediate bad result is that color-name-to-rgb returns a value that = is (a) wrong and (b) outside the range of legal values for that = function. Code calling it expect the value to be (a) correct and (b) = within the range of legal values. > (Btw, in a GUI session I see (0.0 0.0 1.0), so no problem there.) Of course, but this was specifically in terminals where the colour = closest to full white isn't. >> The main problem is trusting "#ffffffffffff" to match a colour with = the maximum range. >=20 > Why is that a problem, given the color representation we use in Emacs? Because there is not always a matching (white) colour that has the = maximum component value. The example I gave was for TERM=3Dxterm-color, = where the closest colour is (#xe5e5 #xe5e5 #xe5e5). Note that this does not mean that the gamut for that terminal is somehow = normalised with (0xe5e5 0xe5e5 0xe5e5) as perfect white; it is not. It = is still the case that the maximum component value is either #xffff or = #xff00; in this case #xffff. Now, for non-TTY Emacs, we typically have an unlimited number of colours = and (color-values "#ffffffffffff") returns the expected value. The same = goes for a TTY where "white" is indeed white and not washed-out grey, = such as TERM=3Dlinux. > Sorry, you lost me here. I don't understand what you are saying here > and what does that have to do with the problem being discussed. Let me try again: (1) We know that the maximum colour component value is 65535 or 65280, = depending on the platform (display system). (2) color-name-to-rgb needs the maximum colour component value in order = to normalise the result. (3) color-name-to-rgb currently uses (color-values "#ffffffffffff") to = obtain the maximum colour component value, but it is not always correct. (4) Instead, we can just use 65535 or 65280 right away, which is fast = and always correct. The rest of my argument was merely discarding the possible alternative = solution of redefining "white" as (255 255 255) for xterm-color. > yields "(65535 65535 65535)", so I don't think I understand what > problem you are concerned with here, and how can this cause a crash. Sorry, I should have been more specific: this condition is present = earlier, in frame-set-background-mode, before the --eval arguments are = processed. This only pertains to the main part of the patch, which we = have not yet discussed. I cannot fault you for being impatient!
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 5 Jun 2020 12:27:54 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Fri Jun 05 08:27:54 2020 Received: from localhost ([127.0.0.1]:48493 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jhBRx-00028I-Si for submit <at> debbugs.gnu.org; Fri, 05 Jun 2020 08:27:54 -0400 Received: from eggs.gnu.org ([209.51.188.92]:47600) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1jhBRw-000285-1c for 41544 <at> debbugs.gnu.org; Fri, 05 Jun 2020 08:27:53 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:35508) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1jhBRq-0008R0-CA; Fri, 05 Jun 2020 08:27:46 -0400 Received: from [176.228.60.248] (port=1299 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1jhBRd-00066j-RT; Fri, 05 Jun 2020 08:27:44 -0400 Date: Fri, 05 Jun 2020 15:27:22 +0300 Message-Id: <835zc5bsut.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> (message from Mattias =?utf-8?Q?Engdeg=C3=A5rd?= on Thu, 4 Jun 2020 17:29:06 +0200) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.1 (--) X-Debbugs-Envelope-To: 41544 Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.1 (---) > From: Mattias Engdegård <mattiase@HIDDEN> > Date: Thu, 4 Jun 2020 17:29:06 +0200 > Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org > > 1. color-name-to-rgb calls (color-values "#ffffffffffff") as a means to get the range of the colour values. There's some history to that: see bug#25890. > 2. With TERM=xterm-color, there are 8 colours. These are assumed to be the 8 first of xterm-standard-colors (xterm.el). > 3. The colour closest to "#ffffffffffff" is "white", with the values (229 229 229), or translated to 16 bit/channel, (#e5e5 #e5e5 #e5e5) which color-values returns. > 4. "blue" has the values (0 0 238), or (0 0 #xeeee). > 5. Thus color-name-to-rgb returns #xeeee/#xe5e5 for the blue channel, or 1.039, which is a clear bug. What bad results does this issue cause in practice? (Btw, in a GUI session I see (0.0 0.0 1.0), so no problem there.) > The main problem is trusting "#ffffffffffff" to match a colour with the maximum range. Why is that a problem, given the color representation we use in Emacs? > It could be argued that xterm.el shouldn't use subdued colours when only 8 are present; I didn't go far back in XTerm history to find out. Modern XTerm has default colours 0-7 that correspond to the assumptions of Emacs. > > Since we already document that the colour channel maximum is either 65535 or 65280 depending on platform, taking the very roundabout way of trying to match a sufficiently white colour and using its components is demonstrably unsafe and error-prone, as well as unnecessarily slow. Hence color-component-max in the patch. Sorry, you lost me here. I don't understand what you are saying here and what does that have to do with the problem being discussed. > This also fixes a different problem: if the display hasn't been initialised fully, such as when running in batch mode, then (color-values "#ffffffffffff") returns nil, and as we shall see later, it may be useful to be able to call color-name-to-rgb at this stage without crashing. This command: emacs -batch --eval "(message \"%s\" (color-name-to-rgb \"white\"))" yields "(1.0 1.0 1.0)" on my system with today's master branch, and this command: emacs -batch --eval "(message \"%s\" (color-values \"#ffffffffffff\"))" yields "(65535 65535 65535)", so I don't think I understand what problem you are concerned with here, and how can this cause a crash. Please elaborate.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 4 Jun 2020 15:29:14 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu Jun 04 11:29:14 2020 Received: from localhost ([127.0.0.1]:47256 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jgrnt-0006k4-Tc for submit <at> debbugs.gnu.org; Thu, 04 Jun 2020 11:29:14 -0400 Received: from mail74c50.megamailservers.eu ([91.136.10.84]:41320 helo=mail92c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <mattiase@HIDDEN>) id 1jgrnr-0006jv-Qf for 41544 <at> debbugs.gnu.org; Thu, 04 Jun 2020 11:29:12 -0400 X-Authenticated-User: mattiase@HIDDEN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1591284550; bh=vhoSfDx0Wg6U5tW75QwhEcmfdbvvgQmIR5rB3QhC5j4=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=pFzquu8XqCoyMbJjHtagG0KJS9NN3FxRBEap6xaOnuwqbJx7lK1EibyhojYXlPtKr u4nyrtEf7pVmi10h/CJT4vLv9jjJbUGu8buEI+k2KfuiZQUOo5XqPzpr2g8nzsq8YH 9T9IiHdrG2APC7GmA5ScXIERmxGUj/el8o9cMx8Q= Feedback-ID: mattiase@HIDDEN Received: from stanniol.lan (c-4e4ae655.032-75-73746f71.bbcust.telenor.se [85.230.74.78]) (authenticated bits=0) by mail92c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 054FT6VY004750; Thu, 4 Jun 2020 15:29:08 +0000 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.14\)) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <83o8pyc4bq.fsf@HIDDEN> Date: Thu, 4 Jun 2020 17:29:06 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <55D73CA5-1EFB-4B0A-8F8B-FDA1D39F51BF@HIDDEN> References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> <83o8pyc4bq.fsf@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> X-Mailer: Apple Mail (2.3445.104.14) X-CTCH-RefID: str=0001.0A782F1F.5ED912DC.00B2:SCFSTAT68638221, ss=1, re=-4.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: -4.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=aY8fYigt c=1 sm=1 tr=0 a=klNLuyVZdLUgl+K5Uafb2A==:117 a=klNLuyVZdLUgl+K5Uafb2A==:17 a=kj9zAlcOel0A:10 a=M51BFTxLslgA:10 a=mDV3o1hIAAAA:8 a=pfK807lD-pJQ71N_UpEA:9 a=CjuIK1q_8ugA:10 a=_FVE-zBwftR9WsbkzFJk:22 X-Spam-Score: 1.4 (+) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: 4 juni 2020 kl. 16.07 skrev Eli Zaretskii <eliz@HIDDEN>: > Let's please discuss each problem in detail (I tried to understand > them from the log message you posted, but couldn't find rationale > there). > > And in any case, I will prefer solutions that fix [...] Content analysis details: (1.4 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [URIs: gnu.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.4 KHOP_HELO_FCRDNS Relay HELO differs from its IP's reverse DNS X-Debbugs-Envelope-To: 41544 Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.0 (/) 4 juni 2020 kl. 16.07 skrev Eli Zaretskii <eliz@HIDDEN>: > Let's please discuss each problem in detail (I tried to understand > them from the log message you posted, but couldn't find rationale > there). >=20 > And in any case, I will prefer solutions that fix any problems > locally, not changes in low-level stuff used in many other places, > because the latter run the risk of introducing new bugs. As the > problems are quite minor, AFAICT, solving them in unsafe ways is > something to be avoided. I think we agree. There should be nothing unsafe here other than the = code being replaced, but code should be scrutinised. > You mean, the component that is 1.0393? What bad decisions caused > that, what problems does this small deviation causes in itself? Yes, this is as good a place to start as any, and the fix for this is a = good change on its own. It goes something like this: 1. color-name-to-rgb calls (color-values "#ffffffffffff") as a means to = get the range of the colour values. 2. With TERM=3Dxterm-color, there are 8 colours. These are assumed to be = the 8 first of xterm-standard-colors (xterm.el). 3. The colour closest to "#ffffffffffff" is "white", with the values = (229 229 229), or translated to 16 bit/channel, (#e5e5 #e5e5 #e5e5) = which color-values returns. 4. "blue" has the values (0 0 238), or (0 0 #xeeee). 5. Thus color-name-to-rgb returns #xeeee/#xe5e5 for the blue channel, or = 1.039, which is a clear bug. The main problem is trusting "#ffffffffffff" to match a colour with the = maximum range. It could be argued that xterm.el shouldn't use subdued = colours when only 8 are present; I didn't go far back in XTerm history = to find out. Modern XTerm has default colours 0-7 that correspond to the = assumptions of Emacs. Since we already document that the colour channel maximum is either = 65535 or 65280 depending on platform, taking the very roundabout way of = trying to match a sufficiently white colour and using its components is = demonstrably unsafe and error-prone, as well as unnecessarily slow. = Hence color-component-max in the patch. This also fixes a different problem: if the display hasn't been = initialised fully, such as when running in batch mode, then = (color-values "#ffffffffffff") returns nil, and as we shall see later, = it may be useful to be able to call color-name-to-rgb at this stage = without crashing.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 4 Jun 2020 14:07:43 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu Jun 04 10:07:43 2020 Received: from localhost ([127.0.0.1]:47173 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jgqX1-0004la-8k for submit <at> debbugs.gnu.org; Thu, 04 Jun 2020 10:07:43 -0400 Received: from eggs.gnu.org ([209.51.188.92]:51956) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1jgqWz-0004lN-FN for 41544 <at> debbugs.gnu.org; Thu, 04 Jun 2020 10:07:41 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:33343) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1jgqWt-0004b1-Hj; Thu, 04 Jun 2020 10:07:35 -0400 Received: from [176.228.60.248] (port=2435 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1jgqWs-0006uU-Ka; Thu, 04 Jun 2020 10:07:35 -0400 Date: Thu, 04 Jun 2020 17:07:21 +0300 Message-Id: <83o8pyc4bq.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> (message from Mattias =?utf-8?Q?Engdeg=C3=A5rd?= on Wed, 3 Jun 2020 22:08:46 +0200) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> <83367ccf8w.fsf@HIDDEN> <624D7FB8-A836-4A7E-8895-47E867214504@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.1 (--) X-Debbugs-Envelope-To: 41544 Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.1 (---) > From: Mattias Engdegård <mattiase@HIDDEN> > Date: Wed, 3 Jun 2020 22:08:46 +0200 > Cc: Tom Tromey <tom@HIDDEN>, Simon Pugnet <simon@HIDDEN>, > 41544 <at> debbugs.gnu.org > > Now about the consolidation of the contrast colour predicate (color-dark-p): as described previously in detail, the current code for doing so in various places is unsatisfactory. For example, some of the methods employed classify #00ff00 as a "dark" colour, leading to suboptimal results. (Try typing #00ff00 in css-mode.) Let's please discuss each problem in detail (I tried to understand them from the log message you posted, but couldn't find rationale there). And in any case, I will prefer solutions that fix any problems locally, not changes in low-level stuff used in many other places, because the latter run the risk of introducing new bugs. As the problems are quite minor, AFAICT, solving them in unsafe ways is something to be avoided. > There are other bugs that are annoying in themselves, but need to be fixed in order to make progress. Start Emacs in TTY mode with TERM=xterm-color and evaluate (color-name-to-rgb "blue"). Notice how one of the components is greater than 1 -- this is the unfortunate result of several bad decisions. You mean, the component that is 1.0393? What bad decisions caused that, what problems does this small deviation causes in itself? We should weigh the gravity of the problems we try to solve here with the potential of breaking working code elsewhere which relies on these idiosyncrasies. Thanks.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 4 Jun 2020 08:57:41 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Thu Jun 04 04:57:41 2020 Received: from localhost ([127.0.0.1]:45110 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jglgy-0002kQ-Rx for submit <at> debbugs.gnu.org; Thu, 04 Jun 2020 04:57:41 -0400 Received: from mail1460c50.megamailservers.eu ([91.136.14.60]:50674 helo=mail267c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <mattiase@HIDDEN>) id 1jglgw-0002kB-Ai for 41544 <at> debbugs.gnu.org; Thu, 04 Jun 2020 04:57:39 -0400 X-Authenticated-User: mattiase@HIDDEN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1591261051; bh=aOioo3604yYitbPwCyDCM8FeJy47KwL1TmO4dh5puZE=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=AkkBPXt984IzLbvKA8XynZJcx5zx6jejh5fo1eP/+C9hvOP7UKarxrhNQa3/PB9Ph qUUwQ3ZFbMmuevNGX8d7NiZ8Lu4Eiy+aN0r8AEZYvjE05N5VnCuzD8t93aS8wyIV1h iFILoZX74RFK6YTj0zEqoxgd/hyTu1CNfvvo/ebE= Feedback-ID: mattiase@HIDDEN Received: from stanniol.lan (c-4e4ae655.032-75-73746f71.bbcust.telenor.se [85.230.74.78]) (authenticated bits=0) by mail267c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 0548vRDR011007; Thu, 4 Jun 2020 08:57:29 +0000 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.14\)) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <87k10ngxus.fsf@HIDDEN> Date: Thu, 4 Jun 2020 10:57:27 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <FD9DCD41-6C27-41EB-9EFB-DDF91EB86961@HIDDEN> References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <87k10ngxus.fsf@HIDDEN> To: Simon Pugnet <simon@HIDDEN> X-Mailer: Apple Mail (2.3445.104.14) X-CTCH-RefID: str=0001.0A782F22.5ED8B701.005B:SCFSTAT68638221, ss=1, re=-4.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: -4.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=Cf92G4jl c=1 sm=1 tr=0 a=klNLuyVZdLUgl+K5Uafb2A==:117 a=klNLuyVZdLUgl+K5Uafb2A==:17 a=kj9zAlcOel0A:10 a=M51BFTxLslgA:10 a=UifCi0nlAAAA:8 a=EJas33KIukAZGsRt7lUA:9 a=CjuIK1q_8ugA:10 a=4HoP0KxMpNvwstRnlwcE:22 X-Spam-Score: 1.4 (+) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: 4 juni 2020 kl. 08.15 skrev Simon Pugnet <simon@HIDDEN>: > I just noticed that the patch and commit 7e8c1a671872ef8e45057f25912594cf548639ab to master both reference the bug incorrectly in test/src/xfaces-tests.el. The comment under the new test is "Check s [...] Content analysis details: (1.4 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [URIs: megamailservers.eu] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.4 KHOP_HELO_FCRDNS Relay HELO differs from its IP's reverse DNS X-Debbugs-Envelope-To: 41544 Cc: Eli Zaretskii <eliz@HIDDEN>, tom@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.0 (/) 4 juni 2020 kl. 08.15 skrev Simon Pugnet <simon@HIDDEN>: > I just noticed that the patch and commit = 7e8c1a671872ef8e45057f25912594cf548639ab to master both reference the = bug incorrectly in test/src/xfaces-tests.el. The comment under the new = test is "Check symmetry (bug#51455)" however the bug ID is 41544. Thanks, fixed.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
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[141.136.153.177]) by smtp.gmail.com with ESMTPSA id i3sm6360142wrm.83.2020.06.03.23.15.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 03 Jun 2020 23:15:59 -0700 (PDT) References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> User-agent: mu4e 1.2.0; emacs 26.3 From: Simon Pugnet <simon@HIDDEN> To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN> Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance In-reply-to: <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> Date: Thu, 04 Jun 2020 07:15:55 +0100 Message-ID: <87k10ngxus.fsf@HIDDEN> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha256; protocol="application/pgp-signature" X-Spam-Score: 0.5 (/) X-Debbugs-Envelope-To: 41544 X-Mailman-Approved-At: Thu, 04 Jun 2020 04:35:28 -0400 Cc: Eli Zaretskii <eliz@HIDDEN>, tom@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.5 (/) --=-=-= Content-Type: text/plain; format=flowed > Very well, it is obviously an improvement. The reason for the > current asymmetry was actually that the algorithm discarded the > low bits; what about fixing that as well? The improved accuracy > amounts to less than 1 % of difference in the return value; no > other code needs changing, and we get the symmetry for free. > Proposed patch attached. Firstly, Mattias and Eli, thank you both for investigating and dealing with this bug so quickly and thoroughly. I just noticed that the patch and commit 7e8c1a671872ef8e45057f25912594cf548639ab to master both reference the bug incorrectly in test/src/xfaces-tests.el. The comment under the new test is "Check symmetry (bug#51455)" however the bug ID is 41544. --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEO/eF3hYsAMj7Tab9uhNZqCwLPvkFAl7YkZsACgkQuhNZqCwL Pvk4bQ/+PH7d6d4S8fked/BaG5wrfDyc5YmaZGIMQhdllk8ghuxmTZ8fT52dZ/w5 Bhb+/+TP3Ht4p/q3HG5uKm584WFPMtDJABy+umP8KUgA1U/XKa+3uHf1QhN1CBQn Q97pqZ/kM4Q25lcUVvCdRRX3JMPp0r2cUYk9dTq9V++HLxSIiozyah2aO8oXvC1M rbNKCII4a4tVioTjgJ0035fxmERAvG+BxSlukhn953kcUvBGco9V3ZI5tgg/ZJxK JQsdycz8fnd+UR+ZVEBtM0yiH5v4KuyIG3B/S3upq9SFl4QO5SDpiffL3TAnU9CP 8gkn0OUqhTPhjTskAwHM46L6G9xteIhB8AJB3UzT5WczYlYMpeTf/M7h5zbeap5W v7ijgCARZX2QetwcdInQDQSzSqKrzU7OcZENvHY1sYpMglLK96UqMUOGge7Un5am UuKZEvWAlR1HpKdIyBruVWu0rGznfmsX3Xtef3hTUZD3mkmXh9qxGD42SHE732rn XtHS3Fzvap+HBk/N0mnZdMlDYyR+8jE1V1PniaU3ZOgp4Ozvna52hi5rqrzz6WAE 9mxmsrEpV4AhYs+zDZNvjkulGJMc9uayzA19A91IAByKEenrXvymDTiY9Eop6b3V k6ndjCH17XfYxnzfEihCnNa/iAgBx8gJRpbHxu8w9K3kQrZIEvo= =6bM1 -----END PGP SIGNATURE----- --=-=-=--
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
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Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance
Date: Wed, 3 Jun 2020 22:08:46 +0200
In-Reply-To: <83367ccf8w.fsf@HIDDEN>
To: Eli Zaretskii <eliz@HIDDEN>
References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN>
<DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN>
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Content preview: 3 juni 2020 kl. 17.59 skrev Eli Zaretskii <eliz@HIDDEN>:
> Then I think we should install it. Thank you; pushed to master.
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3 juni 2020 kl. 17.59 skrev Eli Zaretskii <eliz@HIDDEN>:
> Then I think we should install it.
Thank you; pushed to master.
Now about the consolidation of the contrast colour predicate =
(color-dark-p): as described previously in detail, the current code for =
doing so in various places is unsatisfactory. For example, some of the =
methods employed classify #00ff00 as a "dark" colour, leading to =
suboptimal results. (Try typing #00ff00 in css-mode.)
There are other bugs that are annoying in themselves, but need to be =
fixed in order to make progress. Start Emacs in TTY mode with =
TERM=3Dxterm-color and evaluate (color-name-to-rgb "blue"). Notice how =
one of the components is greater than 1 -- this is the unfortunate =
result of several bad decisions.
The attached patch supersedes the previous one; after staring at colour =
combinations I came to the conclusion that gamma-expansion is a =
necessity, but the exact sRGB composite gamma curve isn't quite =
necessary, and a power of 2.2 is close enough.
It also uses a contrasting text colour for the first column in =
list-colors-display, which serves as a good demonstration of how the =
predicate works for the standard named colours.
--Apple-Mail=_7AF097D7-D9EE-4CBA-891D-80A035FB968B
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bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 3 Jun 2020 15:59:37 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Jun 03 11:59:36 2020 Received: from localhost ([127.0.0.1]:44448 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jgVnk-0001PA-Kl for submit <at> debbugs.gnu.org; Wed, 03 Jun 2020 11:59:36 -0400 Received: from eggs.gnu.org ([209.51.188.92]:59498) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1jgVnf-0001Oq-N5 for 41544 <at> debbugs.gnu.org; Wed, 03 Jun 2020 11:59:35 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:43880) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1jgVnZ-0008RW-Q8; Wed, 03 Jun 2020 11:59:25 -0400 Received: from [176.228.60.248] (port=4347 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1jgVnY-00035W-W6; Wed, 03 Jun 2020 11:59:25 -0400 Date: Wed, 03 Jun 2020 18:59:11 +0300 Message-Id: <83367ccf8w.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> (message from Mattias =?utf-8?Q?Engdeg=C3=A5rd?= on Wed, 3 Jun 2020 17:01:46 +0200) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.1 (--) X-Debbugs-Envelope-To: 41544 Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.1 (---) > From: Mattias Engdegård <mattiase@HIDDEN> > Date: Wed, 3 Jun 2020 17:01:46 +0200 > Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org > > 3 juni 2020 kl. 16.24 skrev Eli Zaretskii <eliz@HIDDEN>: > > > Not sure I understand completely: does this patch make the function > > symmetric? > > Yes, the patch both improves the accuracy and makes the function symmetric. Then I think we should install it.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 3 Jun 2020 15:02:17 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Jun 03 11:02:17 2020 Received: from localhost ([127.0.0.1]:44374 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jgUu3-0008Sq-Lu for submit <at> debbugs.gnu.org; Wed, 03 Jun 2020 11:02:17 -0400 Received: from mail1447c50.megamailservers.eu ([91.136.14.47]:35958 helo=mail265c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <mattiase@HIDDEN>) id 1jgUtw-0008SG-Rz for 41544 <at> debbugs.gnu.org; Wed, 03 Jun 2020 11:02:01 -0400 X-Authenticated-User: mattiase@HIDDEN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1591196510; bh=qWCEGsTS1wd5iS8aIuJ/v7ZVHNt4zb35pXMNUYxgCic=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=JGjguN63LS38L6wWczRnxU5Bwgg8wZm0bhvvbyhjuRqtGN/0j9GXSk8n/9Y3Zpfe5 HEkbi6ed2wr579CVpaPSC9Seony3IJdigs7f9qRKyLGscVFMqc85gEQ2oiMnz8OxT2 DiW+G6DpfSpwM+jo8CkaBflYhYKMplNHbVox4yR0= Feedback-ID: mattiase@HIDDEN Received: from stanniol.lan (c-4e4ae655.032-75-73746f71.bbcust.telenor.se [85.230.74.78]) (authenticated bits=0) by mail265c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 053F1kFD029457; Wed, 3 Jun 2020 15:01:48 +0000 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.14\)) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <83blm0cjlz.fsf@HIDDEN> Date: Wed, 3 Jun 2020 17:01:46 +0200 Content-Transfer-Encoding: 7bit Message-Id: <DFEE560C-C8A7-4B8E-B9D1-D2DC37C1034A@HIDDEN> References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> <83blm0cjlz.fsf@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> X-Mailer: Apple Mail (2.3445.104.14) X-CTCH-RefID: str=0001.0A782F25.5ED7BAD3.0039:SCFSTAT68638221, ss=1, re=-4.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: -4.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=D5w51cZj c=1 sm=1 tr=0 a=klNLuyVZdLUgl+K5Uafb2A==:117 a=klNLuyVZdLUgl+K5Uafb2A==:17 a=kj9zAlcOel0A:10 a=M51BFTxLslgA:10 a=mDV3o1hIAAAA:8 a=3qhpsr4axi-On4-2KVYA:9 a=CjuIK1q_8ugA:10 a=ncZ9vwaUYPMA:10 a=_FVE-zBwftR9WsbkzFJk:22 X-Spam-Score: 0.4 (/) X-Debbugs-Envelope-To: 41544 Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.0 (/) 3 juni 2020 kl. 16.24 skrev Eli Zaretskii <eliz@HIDDEN>: > Not sure I understand completely: does this patch make the function > symmetric? Yes, the patch both improves the accuracy and makes the function symmetric.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 3 Jun 2020 14:25:22 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Wed Jun 03 10:25:22 2020 Received: from localhost ([127.0.0.1]:44304 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jgUKX-0007WS-OT for submit <at> debbugs.gnu.org; Wed, 03 Jun 2020 10:25:21 -0400 Received: from eggs.gnu.org ([209.51.188.92]:47660) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1jgUKW-0007WE-88 for 41544 <at> debbugs.gnu.org; Wed, 03 Jun 2020 10:25:20 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:42299) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1jgUKQ-00037i-5L; Wed, 03 Jun 2020 10:25:14 -0400 Received: from [176.228.60.248] (port=2586 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1jgUKO-0004wq-LX; Wed, 03 Jun 2020 10:25:13 -0400 Date: Wed, 03 Jun 2020 17:24:56 +0300 Message-Id: <83blm0cjlz.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> (message from Mattias =?utf-8?Q?Engdeg=C3=A5rd?= on Tue, 2 Jun 2020 22:41:03 +0200) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> <83y2p5cumz.fsf@HIDDEN> <B671DFD8-FE47-4AE5-9F55-DD0652BB2F2F@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.1 (--) X-Debbugs-Envelope-To: 41544 Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.1 (---) > From: Mattias Engdegård <mattiase@HIDDEN> > Date: Tue, 2 Jun 2020 22:41:03 +0200 > Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org > > > I'd prefer to fix only the symmetry bug (which AFAIU happens because > > we use bit shifts on signed integers), without introducing any other > > effects on the function's behavior and return values. AFAIU, such a > > fix should not require any changes outside of the function itself. > > Very well, it is obviously an improvement. The reason for the current asymmetry was actually that the algorithm discarded the low bits; what about fixing that as well? Sure, let's make it as accurate as the return value allows. > The improved accuracy amounts to less than 1 % of difference in the return value; no other code needs changing, and we get the symmetry for free. Proposed patch attached. Not sure I understand completely: does this patch make the function symmetric? If so, what additional improvements did you have in mind when you mentioned more fixing above? Thanks.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
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From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN>
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Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance
Date: Tue, 2 Jun 2020 22:41:03 +0200
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To: Eli Zaretskii <eliz@HIDDEN>
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2 juni 2020 kl. 18.14 skrev Eli Zaretskii <eliz@HIDDEN>:
> I'd prefer to fix only the symmetry bug (which AFAIU happens because
> we use bit shifts on signed integers), without introducing any other
> effects on the function's behavior and return values. AFAIU, such a
> fix should not require any changes outside of the function itself.
Very well, it is obviously an improvement. The reason for the current =
asymmetry was actually that the algorithm discarded the low bits; what =
about fixing that as well? The improved accuracy amounts to less than 1 =
% of difference in the return value; no other code needs changing, and =
we get the symmetry for free. Proposed patch attached.
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bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 2 Jun 2020 16:15:04 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Tue Jun 02 12:15:04 2020 Received: from localhost ([127.0.0.1]:40728 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jg9Z9-0001Ch-Pz for submit <at> debbugs.gnu.org; Tue, 02 Jun 2020 12:15:04 -0400 Received: from eggs.gnu.org ([209.51.188.92]:53902) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1jg9Z8-0001Bu-4t for 41544 <at> debbugs.gnu.org; Tue, 02 Jun 2020 12:15:02 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:47539) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1jg9Z2-0005Z8-A0; Tue, 02 Jun 2020 12:14:56 -0400 Received: from [176.228.60.248] (port=4300 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1jg9Ys-0006Sn-UG; Tue, 02 Jun 2020 12:14:55 -0400 Date: Tue, 02 Jun 2020 19:14:28 +0300 Message-Id: <83y2p5cumz.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> (message from Mattias =?utf-8?Q?Engdeg=C3=A5rd?= on Tue, 2 Jun 2020 17:27:46 +0200) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.1 (--) X-Debbugs-Envelope-To: 41544 Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.1 (---) > From: Mattias Engdegård <mattiase@HIDDEN> > Date: Tue, 2 Jun 2020 17:27:46 +0200 > Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org > > Let's start with the color-distance changes, out of respect for the bug reporter if nothing else. > > It is not possible to change a function without changing it. Either we fix it or we don't. The reported bug was about broken symmetry, which is rather embarrassing; as written previously, the first analysis uncovered deeper issues worth fixing, such as loss of precision and (especially) the nonlinearity that causes triangle inequality violation. > > The proposed fixes to color-distance, I hope you agree, are straightforward, reasonable and address all these points. Callers have been updated with carefully recomputed comparison constants; I detailed how they were obtained in a previous reply, and test have all been satisfactory. I'd prefer to fix only the symmetry bug (which AFAIU happens because we use bit shifts on signed integers), without introducing any other effects on the function's behavior and return values. AFAIU, such a fix should not require any changes outside of the function itself. OK?
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 2 Jun 2020 15:27:55 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Tue Jun 02 11:27:55 2020 Received: from localhost ([127.0.0.1]:40618 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jg8pW-0008Ms-TT for submit <at> debbugs.gnu.org; Tue, 02 Jun 2020 11:27:55 -0400 Received: from mail171c50.megamailservers.eu ([91.136.10.181]:54736 helo=mail92c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <mattiase@HIDDEN>) id 1jg8pU-0008Me-57 for 41544 <at> debbugs.gnu.org; Tue, 02 Jun 2020 11:27:54 -0400 X-Authenticated-User: mattiase@HIDDEN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1591111670; bh=EiRxBbGhp6jfAwN+XKHGCHyTCvyBKXYNBE+Pu6v3iZ0=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=UcSvF0UUWQSxPwrqTwzs/BoIGlAD8nblBpPKhR9z5MuFm88I9BceOjdU8J9jdRCMq aotBJrMNAsSJVWdLS7yWm+uDfpXbra0BiXFQe/ilcUbSkYOxH0q1hJ6ZitjXfkYNy4 cJyRz6Z18FeZ8kj50/9/Fgd8D9U6JnlpU/dbLUHQ= Feedback-ID: mattiase@HIDDEN Received: from stanniol.lan (c-4e4ae655.032-75-73746f71.bbcust.telenor.se [85.230.74.78]) (authenticated bits=0) by mail92c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 052FRlL5027557; Tue, 2 Jun 2020 15:27:48 +0000 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.14\)) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <83mu5mel4o.fsf@HIDDEN> Date: Tue, 2 Jun 2020 17:27:46 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <77F1DDD3-A69F-40ED-902D-74986D5E6596@HIDDEN> References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> <83mu5mel4o.fsf@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> X-Mailer: Apple Mail (2.3445.104.14) X-CTCH-RefID: str=0001.0A782F27.5ED66F9C.006E:SCFSTAT68638221, ss=1, re=-4.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: -4.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=aY8fYigt c=1 sm=1 tr=0 a=klNLuyVZdLUgl+K5Uafb2A==:117 a=klNLuyVZdLUgl+K5Uafb2A==:17 a=kj9zAlcOel0A:10 a=M51BFTxLslgA:10 a=mDV3o1hIAAAA:8 a=cU5vsblOPORyMJlAhFAA:9 a=CjuIK1q_8ugA:10 a=_FVE-zBwftR9WsbkzFJk:22 X-Spam-Score: 1.4 (+) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: 1 juni 2020 kl. 19.44 skrev Eli Zaretskii <eliz@HIDDEN>: >> I'm just looking at the changes. I see a change in how colors are >> converted to RGB triplets. I see a change in what colors are >> considered dark and light, with a new function which decides tha [...] Content analysis details: (1.4 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [URIs: gnu.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.4 KHOP_HELO_FCRDNS Relay HELO differs from its IP's reverse DNS X-Debbugs-Envelope-To: 41544 Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.0 (/) 1 juni 2020 kl. 19.44 skrev Eli Zaretskii <eliz@HIDDEN>: >> I'm just looking at the changes. I see a change in how colors are >> converted to RGB triplets. I see a change in what colors are >> considered dark and light, with a new function which decides that = that >> is being used for frame background mode and in several lisp/term/ >> files, including 16-color terminals. I'm asking why do we want to >> make all those changes, which modify very basic aspects of our color >> support on many terminals. >=20 > And then, of course, there are the changes in color-distance itself, > which change the values it returns. Again, why such significant > changes to fix an otherwise insignificant bug? It is difficult to give precise answers to vague complaints. Take one = thing at a time: as I wrote, there are two different patches addressing = two almost completely different issues. Let's start with the = color-distance changes, out of respect for the bug reporter if nothing = else. It is not possible to change a function without changing it. Either we = fix it or we don't. The reported bug was about broken symmetry, which is = rather embarrassing; as written previously, the first analysis uncovered = deeper issues worth fixing, such as loss of precision and (especially) = the nonlinearity that causes triangle inequality violation. The proposed fixes to color-distance, I hope you agree, are = straightforward, reasonable and address all these points. Callers have = been updated with carefully recomputed comparison constants; I detailed = how they were obtained in a previous reply, and test have all been = satisfactory.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 2 Jun 2020 15:08:56 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Tue Jun 02 11:08:56 2020 Received: from localhost ([127.0.0.1]:40608 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jg8XA-0007rr-AE for submit <at> debbugs.gnu.org; Tue, 02 Jun 2020 11:08:56 -0400 Received: from mail72c50.megamailservers.eu ([91.136.10.82]:52188 helo=mail92c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <mattiase@HIDDEN>) id 1jg8X8-0007rg-19 for 41544 <at> debbugs.gnu.org; Tue, 02 Jun 2020 11:08:55 -0400 X-Authenticated-User: mattiase@HIDDEN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1591110531; bh=MIA2Ed32TuY1chjkz5llieGREe7djImuoIaKeSndBY8=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=OVRdgBLo1DeY6FOUhyRb0qW3Jd4cXOkp17P6Uu6qzA2dAVDyNr5eZwDVpZI4IqMm8 ZnG8GTruTwudwhWs8GnEQoh33xT52t2ln83bFhlai3d8cxXGSZGNOu1Tu7t4JRfwpr M9rg2Te97gDpFNQJU0NWrvgLOAYq5stK8sQdaseY= Feedback-ID: mattiase@HIDDEN Received: from stanniol.lan (c-4e4ae655.032-75-73746f71.bbcust.telenor.se [85.230.74.78]) (authenticated bits=0) by mail92c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 052F8lDD031069; Tue, 2 Jun 2020 15:08:49 +0000 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.14\)) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <877dwqbmc6.fsf@HIDDEN> Date: Tue, 2 Jun 2020 17:08:47 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <E801A168-E8AD-4A1F-84FF-3BBA6D34BD03@HIDDEN> References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <877dwqbmc6.fsf@HIDDEN> To: "Basil L. Contovounesios" <contovob@HIDDEN> X-Mailer: Apple Mail (2.3445.104.14) X-CTCH-RefID: str=0001.0A782F28.5ED66B31.0058:SCFSTAT68638221, ss=1, re=-4.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: -4.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=aY8fYigt c=1 sm=1 tr=0 a=klNLuyVZdLUgl+K5Uafb2A==:117 a=klNLuyVZdLUgl+K5Uafb2A==:17 a=kj9zAlcOel0A:10 a=M51BFTxLslgA:10 a=ki0sEvHv-SN8jT7Vzy0A:9 a=CjuIK1q_8ugA:10 X-Spam-Score: 1.4 (+) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: 1 juni 2020 kl. 21.46 skrev Basil L. Contovounesios <contovob@HIDDEN>: > Does the list of 7 places already include net/shr-color.el? No, and thanks for bringing it to my attention! That code appears considerably more sophisticated than the others, and its task (in shr-color-visible) is somewhat different (not just a decision betwee [...] Content analysis details: (1.4 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. 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Contovounesios <contovob@HIDDEN>: > Does the list of 7 places already include net/shr-color.el? No, and thanks for bringing it to my attention! That code appears = considerably more sophisticated than the others, and its task (in = shr-color-visible) is somewhat different (not just a decision between = black and white as contrasting colour). It's probably better to leave it = alone for now.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
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From: "Basil L. Contovounesios" <contovob@HIDDEN>
To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN>
Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance
References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN>
<DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN>
<87r1v2aat3.fsf@HIDDEN>
<9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN>
Date: Mon, 01 Jun 2020 20:46:49 +0100
In-Reply-To: <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> ("Mattias
=?utf-8?Q?Engdeg=C3=A5rd=22's?= message of "Sun, 31 May 2020 22:46:07
+0200")
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Mattias Engdeg=C3=A5rd <mattiase@HIDDEN> writes:
> Emacs does this sort of is-this-colour-dark computation in at least 7
> different places, with different algorithms:
>
> * max(r,g,b) < 0.5
> * r+g+b < 0.5*3
> * color-distance(c, "black") < 292485
Does the list of 7 places already include net/shr-color.el?
--=20
Basil
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 1 Jun 2020 17:44:54 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Jun 01 13:44:54 2020 Received: from localhost ([127.0.0.1]:36947 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jfoUY-0002yA-7q for submit <at> debbugs.gnu.org; Mon, 01 Jun 2020 13:44:54 -0400 Received: from eggs.gnu.org ([209.51.188.92]:55000) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1jfoUW-0002xx-8R for 41544 <at> debbugs.gnu.org; Mon, 01 Jun 2020 13:44:53 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:53202) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1jfoUP-0004Gf-Sw; Mon, 01 Jun 2020 13:44:45 -0400 Received: from [176.228.60.248] (port=1400 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1jfoUO-0005NT-ND; Mon, 01 Jun 2020 13:44:45 -0400 Date: Mon, 01 Jun 2020 20:44:39 +0300 Message-Id: <83mu5mel4o.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: mattiase@HIDDEN In-Reply-To: <83o8q2elja.fsf@HIDDEN> (message from Eli Zaretskii on Mon, 01 Jun 2020 20:35:53 +0300) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> <83o8q2elja.fsf@HIDDEN> X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 41544 Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > Date: Mon, 01 Jun 2020 20:35:53 +0300 > From: Eli Zaretskii <eliz@HIDDEN> > Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org > > I'm just looking at the changes. I see a change in how colors are > converted to RGB triplets. I see a change in what colors are > considered dark and light, with a new function which decides that that > is being used for frame background mode and in several lisp/term/ > files, including 16-color terminals. I'm asking why do we want to > make all those changes, which modify very basic aspects of our color > support on many terminals. And then, of course, there are the changes in color-distance itself, which change the values it returns. Again, why such significant changes to fix an otherwise insignificant bug?
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 1 Jun 2020 17:36:09 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Jun 01 13:36:09 2020 Received: from localhost ([127.0.0.1]:36943 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jfoM5-0002lk-A1 for submit <at> debbugs.gnu.org; Mon, 01 Jun 2020 13:36:09 -0400 Received: from eggs.gnu.org ([209.51.188.92]:53562) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1jfoM1-0002lC-Dy for 41544 <at> debbugs.gnu.org; Mon, 01 Jun 2020 13:36:07 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:53071) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1jfoLv-0002IP-4A; Mon, 01 Jun 2020 13:35:59 -0400 Received: from [176.228.60.248] (port=4829 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1jfoLu-0004lN-5S; Mon, 01 Jun 2020 13:35:58 -0400 Date: Mon, 01 Jun 2020 20:35:53 +0300 Message-Id: <83o8q2elja.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> (message from Mattias =?utf-8?Q?Engdeg=C3=A5rd?= on Mon, 1 Jun 2020 19:24:45 +0200) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 41544 Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > From: Mattias Engdegård <mattiase@HIDDEN> > Date: Mon, 1 Jun 2020 19:24:45 +0200 > Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org > > > I'm worried because the way our automatic color mapping on > > color-challenged TTYs works took some time to get right, and it worked > > well for years. If we want to risk rocking that particular boat som > > profoundly, we had better had a very good reason, preferably several > > good reasons. > > Not quite sure what you are talking about here. You previously asked about the exact value of TTY_SAME_COLOR_THRESHOLD. Were you unsatisfied with my answer, and if so, in what respect? I'm just looking at the changes. I see a change in how colors are converted to RGB triplets. I see a change in what colors are considered dark and light, with a new function which decides that that is being used for frame background mode and in several lisp/term/ files, including 16-color terminals. I'm asking why do we want to make all those changes, which modify very basic aspects of our color support on many terminals.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 1 Jun 2020 17:25:02 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Jun 01 13:25:02 2020 Received: from localhost ([127.0.0.1]:36926 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jfoBH-0002Tf-0g for submit <at> debbugs.gnu.org; Mon, 01 Jun 2020 13:25:02 -0400 Received: from mail1450c50.megamailservers.eu ([91.136.14.50]:47058 helo=mail265c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <mattiase@HIDDEN>) id 1jfoBE-0002TR-Cc for 41544 <at> debbugs.gnu.org; Mon, 01 Jun 2020 13:24:57 -0400 X-Authenticated-User: mattiase@HIDDEN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1591032289; bh=wCRDcnNqgat74Gf4ebJyCwelsaWYz0d9DTHDtfdIcPE=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=A1UvYsdVGy/iDEMACVMe8cmPMsF2vvoqY0kfbLUDdghMmlXVPsyq/oIcUdk/oiT5z jH1xn2tcL1rzb0vKsHntfE1PNwu10pRHagUCd7FrXhfM+Pz8x9imvLVBcfl3jFsvNH VQFe0YkaAfMhiZjec5DxmzDrMtAH912lC3l33oyQ= Feedback-ID: mattiase@HIDDEN Received: from stanniol.lan (c-4e4ae655.032-75-73746f71.bbcust.telenor.se [85.230.74.78]) (authenticated bits=0) by mail265c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 051HOkwQ002093; Mon, 1 Jun 2020 17:24:47 +0000 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.14\)) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <83tuzueogo.fsf@HIDDEN> Date: Mon, 1 Jun 2020 19:24:45 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <6272275C-560C-4437-90F1-2A8294D27019@HIDDEN> References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> <83tuzueogo.fsf@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> X-Mailer: Apple Mail (2.3445.104.14) X-CTCH-RefID: str=0001.0A782F26.5ED53987.006A:SCFSTAT68638221, ss=1, re=-4.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: -4.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=D5w51cZj c=1 sm=1 tr=0 a=klNLuyVZdLUgl+K5Uafb2A==:117 a=klNLuyVZdLUgl+K5Uafb2A==:17 a=kj9zAlcOel0A:10 a=M51BFTxLslgA:10 a=mDV3o1hIAAAA:8 a=HwH1CxdJoGffx6xDYTMA:9 a=CjuIK1q_8ugA:10 a=_FVE-zBwftR9WsbkzFJk:22 X-Spam-Score: 1.4 (+) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: 1 juni 2020 kl. 18.32 skrev Eli Zaretskii <eliz@HIDDEN>: > Please remind me why do we want to make such deep and wide changes in > our color system? Is that just because we have a minor bug in > color-distance? Wouldn't it be better to just fix that one bug [...] Content analysis details: (1.4 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [URIs: gnu.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.4 KHOP_HELO_FCRDNS Relay HELO differs from its IP's reverse DNS X-Debbugs-Envelope-To: 41544 Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.0 (-) 1 juni 2020 kl. 18.32 skrev Eli Zaretskii <eliz@HIDDEN>: > Please remind me why do we want to make such deep and wide changes in > our color system? Is that just because we have a minor bug in > color-distance? Wouldn't it be better to just fix that one bug? These changes are neither deep nor wide. Perhaps the confusion arose = from remeding two almost entirely independent issues in the same = discussion: the flaws in color-distance, taken care of by the first = patch, and the contrasting colour computation, which was the topic of = the message and patch you replied to. Sorry about conflating the two -- I should have opened a separate bug = for the colour contrast mess. Their only point of intersection was, in = hindsight, rather coincidental (css-mode). > I'm worried because the way our automatic color mapping on > color-challenged TTYs works took some time to get right, and it worked > well for years. If we want to risk rocking that particular boat som > profoundly, we had better had a very good reason, preferably several > good reasons. Not quite sure what you are talking about here. You previously asked = about the exact value of TTY_SAME_COLOR_THRESHOLD. Were you unsatisfied = with my answer, and if so, in what respect?
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 1 Jun 2020 16:32:48 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Mon Jun 01 12:32:48 2020 Received: from localhost ([127.0.0.1]:36848 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jfnMl-00017L-S4 for submit <at> debbugs.gnu.org; Mon, 01 Jun 2020 12:32:48 -0400 Received: from eggs.gnu.org ([209.51.188.92]:45480) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1jfnMk-000178-Dy for 41544 <at> debbugs.gnu.org; Mon, 01 Jun 2020 12:32:46 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:52109) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1jfnMd-0006C0-Ri; Mon, 01 Jun 2020 12:32:40 -0400 Received: from [176.228.60.248] (port=4654 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1jfnMc-00066W-Qn; Mon, 01 Jun 2020 12:32:39 -0400 Date: Mon, 01 Jun 2020 19:32:39 +0300 Message-Id: <83tuzueogo.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> (message from Mattias =?utf-8?Q?Engdeg=C3=A5rd?= on Sun, 31 May 2020 22:46:07 +0200) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <87r1v2aat3.fsf@HIDDEN> <9902865C-01B4-4E50-A433-DBC8B8311234@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 41544 Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > From: Mattias Engdegård <mattiase@HIDDEN> > Date: Sun, 31 May 2020 22:46:07 +0200 > Cc: Simon Pugnet <simon@HIDDEN>, 41544 <at> debbugs.gnu.org, > Eli Zaretskii <eliz@HIDDEN> > > Proposed patch attached. I found css-mode no worse than before (a tad better, if anything). Perhaps we need to decompress to linear components after all, but at least now there is a single place to do it. > > (Should list-colors-display use color-dark-p for the text in its left column, by the way? Or is there a point in not doing so?) Please remind me why do we want to make such deep and wide changes in our color system? Is that just because we have a minor bug in color-distance? Wouldn't it be better to just fix that one bug? I'm worried because the way our automatic color mapping on color-challenged TTYs works took some time to get right, and it worked well for years. If we want to risk rocking that particular boat som profoundly, we had better had a very good reason, preferably several good reasons. Thanks.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
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Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance
Date: Sun, 31 May 2020 22:46:07 +0200
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29 maj 2020 kl. 19.52 skrev Tom Tromey <tom@HIDDEN>:
> However, my main concern is just whether it still picks reasonably
> contrasting colors when editing CSS. If it does, then that's good
> enough for me.
Thank you for the kind words. I couldn't leave well enough alone, of =
course. Emacs does this sort of is-this-colour-dark computation in at =
least 7 different places, with different algorithms:
* max(r,g,b) < 0.5
* r+g+b < 0.5*3
* color-distance(c, "black") < 292485
They aren't really satisfactory: for example, saturated blue (#0000ff) =
is quite clearly 'dark', yet the first algorithm considers it 'light'. =
Colour distance isn't quite right either -- the implemented formula is =
intended to measure distances between colours, not brightness. For =
example, it considers #ff0000 to be closer than #0000ff to black, but =
the red is clearly brighter.
I tentatively went with your suggested 0.299r + 0.587g + 0.114g, with a =
cut-off value of 0.58 to make saturated blue and red 'dark' and green =
'light'. This is not a correct luma calculation since there is no gamma =
correction, but it might do for this purpose.
Proposed patch attached. I found css-mode no worse than before (a tad =
better, if anything). Perhaps we need to decompress to linear components =
after all, but at least now there is a single place to do it.
(Should list-colors-display use color-dark-p for the text in its left =
column, by the way? Or is there a point in not doing so?)
--Apple-Mail=_7FF6E8CE-41E3-44BB-A837-E0A212C5FA1B
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bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
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From: Tom Tromey <tom@HIDDEN>
To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN>
Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance
References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN>
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Mattias> Try the attached patch. A couple of constants used for
Mattias> comparison were recomputed, but since they mostly appeared to
Mattias> have been picked out of thin air, I didn't bother attempting a
Mattias> very precise translation.
Thank you for doing this.
I wasn't sure whether Emacs would accept a patch changing the return
value in this way.
However, my main concern is just whether it still picks reasonably
contrasting colors when editing CSS. If it does, then that's good
enough for me.
thanks,
Tom
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 29 May 2020 17:28:58 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Fri May 29 13:28:58 2020 Received: from localhost ([127.0.0.1]:56101 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jeioU-0001Z4-82 for submit <at> debbugs.gnu.org; Fri, 29 May 2020 13:28:58 -0400 Received: from mail1454c50.megamailservers.eu ([91.136.14.54]:44246 helo=mail266c50.megamailservers.eu) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <mattiase@HIDDEN>) id 1jeioR-0001Ym-U0 for 41544 <at> debbugs.gnu.org; Fri, 29 May 2020 13:28:56 -0400 X-Authenticated-User: mattiase@HIDDEN DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=megamailservers.eu; s=maildub; t=1590773328; bh=t34qr4VfLJe8hwaTHC9A99DXmRZmQkEj1u7Ng2eo2Io=; h=Subject:From:In-Reply-To:Date:Cc:References:To:From; b=GDO9Rt9R2iuT953isbHi4pTh1rvJCQWHQc9hRiXdjcuGbavE5gXn7u/Fw0aYaBAaC Ic+o+Jwd0WnzS+j/HmAYDup3GCOgjLv/msA5Q08FwJR4xA59/z4BT7KSWFfWbcIGPj aHt27/H4tWcR0dHdFTHl1jiVINzxnLOFbSZ8dq08= Feedback-ID: mattiase@HIDDEN Received: from stanniol.lan (c-4e4ae655.032-75-73746f71.bbcust.telenor.se [85.230.74.78]) (authenticated bits=0) by mail266c50.megamailservers.eu (8.14.9/8.13.1) with ESMTP id 04THSiV4015235; Fri, 29 May 2020 17:28:46 +0000 Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Mac OS X Mail 12.4 \(3445.104.14\)) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance From: =?utf-8?Q?Mattias_Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <83pnamn47h.fsf@HIDDEN> Date: Fri, 29 May 2020 19:28:44 +0200 Content-Transfer-Encoding: quoted-printable Message-Id: <94FCD141-F201-49D1-BDAD-9FFA46D48D6D@HIDDEN> References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> <83pnamn47h.fsf@HIDDEN> To: Eli Zaretskii <eliz@HIDDEN> X-Mailer: Apple Mail (2.3445.104.14) X-CTCH-RefID: str=0001.0A782F28.5ED14602.001D:SCFSTAT68638221, ss=1, re=-4.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0 X-CTCH-VOD: Unknown X-CTCH-Spam: Unknown X-CTCH-Score: -4.000 X-CTCH-Rules: X-CTCH-Flags: 0 X-CTCH-ScoreCust: 0.000 X-CSC: 0 X-CHA: v=2.3 cv=A5MSwJeG c=1 sm=1 tr=0 a=klNLuyVZdLUgl+K5Uafb2A==:117 a=klNLuyVZdLUgl+K5Uafb2A==:17 a=kj9zAlcOel0A:10 a=M51BFTxLslgA:10 a=mDV3o1hIAAAA:8 a=cUxbU7hPt0qoel6uMsQA:9 a=CjuIK1q_8ugA:10 a=_FVE-zBwftR9WsbkzFJk:22 X-Spam-Score: 1.4 (+) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: 29 maj 2020 kl. 17.36 skrev Eli Zaretskii <eliz@HIDDEN>: > Did you try what this does to tty-color-approximate and friends, > especially when the terminal supports only 8 or 16 colors? If not, > please do, we must ensure there are no regressions there. Content analysis details: (1.4 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [URIs: megamailservers.eu] 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.4 KHOP_HELO_FCRDNS Relay HELO differs from its IP's reverse DNS X-Debbugs-Envelope-To: 41544 Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -0.0 (/) 29 maj 2020 kl. 17.36 skrev Eli Zaretskii <eliz@HIDDEN>: > Did you try what this does to tty-color-approximate and friends, > especially when the terminal supports only 8 or 16 colors? If not, > please do, we must ensure there are no regressions there. tty-color-approximate uses its own metric (square of the unweighted = Euclidian RGB distance). To test the TTY_SAME_COLOR_THRESHOLD, I tried = display-supports-face-attributes-p, and it seems to behave in the same = way. All tested with TERM=3Dxterm-color, which gives the standard 8 = colours. The translated constants were obtained by generating many random RGB = triples and computing distances between all pairs, then finding the = value of NEWCONST which minimises the number of cases where old-colour-dist(c1,c2) < OLDCONST and new-colour-dist(c1,c2) < NEWCONST differ in truth value. The computation was also run on the rgb.txt list = instead of random colours as an extra check.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Received: (at 41544) by debbugs.gnu.org; 29 May 2020 15:36:33 +0000 From debbugs-submit-bounces <at> debbugs.gnu.org Fri May 29 11:36:33 2020 Received: from localhost ([127.0.0.1]:55848 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>) id 1jeh3h-0006p0-Cj for submit <at> debbugs.gnu.org; Fri, 29 May 2020 11:36:33 -0400 Received: from eggs.gnu.org ([209.51.188.92]:41332) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from <eliz@HIDDEN>) id 1jeh3f-0006ol-BL for 41544 <at> debbugs.gnu.org; Fri, 29 May 2020 11:36:31 -0400 Received: from fencepost.gnu.org ([2001:470:142:3::e]:41261) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from <eliz@HIDDEN>) id 1jeh3Z-0005nw-Lr; Fri, 29 May 2020 11:36:25 -0400 Received: from [176.228.60.248] (port=2302 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from <eliz@HIDDEN>) id 1jeh3Y-0003po-53; Fri, 29 May 2020 11:36:24 -0400 Date: Fri, 29 May 2020 18:36:18 +0300 Message-Id: <83pnamn47h.fsf@HIDDEN> From: Eli Zaretskii <eliz@HIDDEN> To: Mattias =?utf-8?Q?Engdeg=C3=A5rd?= <mattiase@HIDDEN> In-Reply-To: <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> (message from Mattias =?utf-8?Q?Engdeg=C3=A5rd?= on Fri, 29 May 2020 17:17:41 +0200) Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance References: <5C4A633D-8222-4439-BE37-9B8674F1DA6D@HIDDEN> <DBC83DAA-B758-45D7-8AB8-708C9C5C6A77@HIDDEN> MIME-version: 1.0 Content-type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Spam-Score: -2.3 (--) X-Debbugs-Envelope-To: 41544 Cc: tom@HIDDEN, simon@HIDDEN, 41544 <at> debbugs.gnu.org X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -3.3 (---) > From: Mattias Engdegård <mattiase@HIDDEN> > Date: Fri, 29 May 2020 17:17:41 +0200 > Cc: Tom Tromey <tom@HIDDEN>, 41544 <at> debbugs.gnu.org > > /* If the distance (as returned by color_distance) between two colors is > less than this, then they are considered the same, for determining > - whether a color is supported or not. The range of values is 0-65535. */ > + whether a color is supported or not. */ > > -#define TTY_SAME_COLOR_THRESHOLD 10000 > +#define TTY_SAME_COLOR_THRESHOLD 25000 Did you try what this does to tty-color-approximate and friends, especially when the terminal supports only 8 or 16 colors? If not, please do, we must ensure there are no regressions there. Thanks.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
Full text available.Mattias Engdegård <mattiase@HIDDEN>
to control <at> debbugs.gnu.org.
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Subject: Re: bug#41544: 26.3; Possible incorrect results from color-distance
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Content preview: tags 41544 patch stop Try the attached patch. A couple of
constants used for comparison were recomputed, but since they mostly appeared
to have been picked out of thin air, I didn't bother attempting a very precise
transla [...]
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tags 41544 patch
stop
Try the attached patch. A couple of constants used for comparison were =
recomputed, but since they mostly appeared to have been picked out of =
thin air, I didn't bother attempting a very precise translation.
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Content preview: [CC:ing Tom Tromey, who used colour-distance in css-mode]
Ah, where to begin. Clearly a distance metric ought to be symmetric; as you
note, this is easily fixed by replacing the shift by division, which has
the extra benefit of not relying on the implementat [...]
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[CC:ing Tom Tromey, who used colour-distance in css-mode]
Ah, where to begin. Clearly a distance metric ought to be symmetric; as =
you note, this is easily fixed by replacing the shift by division, which =
has the extra benefit of not relying on the implementation-defined =
behaviour when right-shifting negative values in C. The extra cost is =
negligible.
Looking at it a bit closer, it seems a waste to use full 16 bit colour =
channels only to shift out 8 of them before getting started. I presume =
this was done partly in order to follow the Riedersma metric more =
closely, and partly to stay within 32 bit numbers (I note that the code =
uses the C 'long' type, which is almost always a mistake). Using 64-bit =
arithmetic costs us next to nothing today, and this solves several =
problems.
But a darker cloud is on the horizon. Since the Emacs implementation =
omits the square root of the result, it no longer satisfies the triangle =
inequality, which is even more fundamental for distance metrics than =
symmetry. It is good enough for comparison of distances, but they can no =
longer be added, since it's not a true metric.
In fact, it seems that users of color_distance are confused as well: a =
comment says
/* If the distance (as returned by color_distance) between two colors =
is
less than this, then they are considered the same, for determining
whether a color is supported or not. The range of values is =
0-65535. */
#define TTY_SAME_COLOR_THRESHOLD 10000
which is a lie, since color_distance can return values well above 65535.
Some uses are very questionable, given that it's the square of a metric:
int delta_delta
=3D (color_distance (&fg_std_color, &bg_std_color)
- color_distance (&fg_tty_color, &bg_tty_color));
if (delta_delta > TTY_SAME_COLOR_THRESHOLD
|| delta_delta < -TTY_SAME_COLOR_THRESHOLD)
So what to do? Best would be to do the arithmetic on the entire channel =
values and take the square root at the end; the cost is nothing to worry =
about on hardware less than 30 years old. Some constants used for =
comparison would need to be adjusted: the above-mentioned =
TTY_SAME_COLOR_THRESHOLD (10000), face-near-same-threshold (30000), and =
a number in css--contrasty-color (292485). At least the last should =
probably use the luma norm originally proposed instead (see bug#25525); =
the use of colour-distance here cannot be right.
bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
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[89.164.25.56]) by smtp.gmail.com with ESMTPSA id a3sm303413edv.70.2020.05.26.09.29.18 for <bug-gnu-emacs@HIDDEN> (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 26 May 2020 09:29:18 -0700 (PDT) User-agent: mu4e 1.2.0; emacs 26.3 From: Simon Pugnet <simon@HIDDEN> To: bug-gnu-emacs@HIDDEN Subject: 26.3; Possible incorrect results from color-distance Date: Tue, 26 May 2020 17:29:16 +0100 Message-ID: <874ks2vew3.fsf@HIDDEN> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha256; protocol="application/pgp-signature" Received-SPF: pass client-ip=2a00:1450:4864:20::52e; envelope-from=simon.pugnet@HIDDEN; helo=mail-ed1-x52e.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -16 X-Spam_score: -1.7 X-Spam_bar: - X-Spam_report: (-1.7 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FORGED_FROMDOMAIN=0.001, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.249, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-Spam-Score: 1.2 (+) X-Spam-Report: Spam detection software, running on the system "debbugs.gnu.org", has NOT identified this incoming email as spam. The original message has been attached to this so you can view it or label similar future email. If you have any questions, see the administrator of that system for details. Content preview: Hello, I have noticed some potentially incorrect behaviour from the `color-distance` elisp function. As an example, take the following elisp: - (list (color-distance '(0 0 0) '(65535 65535 65535)) (color-distance '(65535 65535 65535) '(0 0 0)) (color-distance '(1 2 3) '(4 5 6)) (color-distance '(4 5 [...] Content analysis details: (1.2 points, 10.0 required) pts rule name description ---- ---------------------- -------------------------------------------------- 0.0 URIBL_BLOCKED ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [URIs: x.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.2 HEADER_FROM_DIFFERENT_DOMAINS From and EnvelopeFrom 2nd level mail domains are different 1.0 SPF_SOFTFAIL SPF: sender does not match SPF record (softfail) 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider (simon.pugnet[at]gmail.com) -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [209.51.188.17 listed in list.dnswl.org] 0.0 RCVD_IN_MSPIKE_H4 RBL: Very Good reputation (+4) [209.51.188.17 listed in wl.mailspike.net] 0.0 RCVD_IN_MSPIKE_WL Mailspike good senders 0.2 FREEMAIL_FORGED_FROMDOMAIN 2nd level domains in From and EnvelopeFrom freemail headers are different 2.0 SPOOFED_FREEMAIL No description available. X-Debbugs-Envelope-To: submit X-Mailman-Approved-At: Tue, 26 May 2020 12:33:51 -0400 X-BeenThere: debbugs-submit <at> debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: <debbugs-submit.debbugs.gnu.org> List-Unsubscribe: <https://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe> List-Archive: <https://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit/> List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org> List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help> List-Subscribe: <https://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>, <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe> Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org> X-Spam-Score: -1.8 (-) --=-=-= Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: quoted-printable Hello, I have noticed some potentially incorrect behaviour from the `color-distance` elisp function. As an example, take the following elisp: - (list (color-distance '(0 0 0) '(65535 65535 65535)) (color-distance '(65535 65535 65535) '(0 0 0)) (color-distance '(1 2 3) '(4 5 6)) (color-distance '(4 5 6) '(1 2 3))) Result: (589568 584970 8 0) Here, I would expect the first two elements to have the same=20 result as well as the third and fourth. This is because conceptually the=20 distance between colour (1 2 3) and (4 5 6) is the same as the distance=20 between (4 5 6) and (1 2 3), etc. The problem comes from the `color_distance()` C function. In this function, values are calculated via bit shifts to perform integer divisions of 256 (>>8) and 512 (>>9). Take for example the 3rd and=20 4th items above (red channel): - 1 - 4 =3D -3 4 - 1 =3D 3 but: - (1 - 4) >> 8 =3D -1 (4 - 1) >> 8 =3D 0 Therefore for negative values, there is a difference of 1 every=20 time the bit shift is performed, which is what leads to the discrepancy=20 mentioned above. Modifying the function to remove these discrepancies causes the=20 results above to become (584970 584970 0 0) which appear to be more=20 sensible. My apologies in advance if this is in fact the correct behaviour=20 of this function. Kind regards, =2D- Simon Pugnet https://www.polaris64.net/ =2D-- In GNU Emacs 26.3 (build 2, x86_64-pc-linux-gnu, GTK+ Version=20 3.24.14) of 2020-03-26, modified by Debian built on lcy01-amd64-020 Windowing system distributor 'The X.Org Foundation', version=20 11.0.12008000 System Description: Ubuntu 20.04 LTS Recent messages: For information about GNU Emacs and the GNU system, type C-h C-a. Mark set (589568 584970 8 0) You can run the command =E2=80=98eval-print-last-sexp=E2=80=99 with C-j Mark activated kill-line: End of buffer Making completion list... You can run the command =E2=80=98kill-region=E2=80=99 with C-w Configured using: 'configure --build x86_64-linux-gnu --prefix=3D/usr --sharedstatedir=3D/var/lib --libexecdir=3D/usr/lib --localstatedir=3D/var/lib --infodir=3D/usr/share/info --mandir=3D/usr/share/man --enable-libsystemd --with-pop=3Dyes --enable-locallisppath=3D/etc/emacs:/usr/local/share/emacs/26.3/site-lisp:= /usr/local/share/emacs/site-lisp:/usr/share/emacs/26.3/site-lisp:/usr/share= /emacs/site-lisp --with-sound=3Dalsa --without-gconf --with-mailutils --build x86_64-linux-gnu --prefix=3D/usr --sharedstatedir=3D/var/lib --libexecdir=3D/usr/lib --localstatedir=3D/var/lib --infodir=3D/usr/share/info --mandir=3D/usr/share/man=20 --enable-libsystemd --with-pop=3Dyes --enable-locallisppath=3D/etc/emacs:/usr/local/share/emacs/26.3/site-lisp:= /usr/local/share/emacs/site-lisp:/usr/share/emacs/26.3/site-lisp:/usr/share= /emacs/site-lisp --with-sound=3Dalsa --without-gconf --with-mailutils --with-x=3Dyes --with-x-toolkit=3Dgtk3 --with-toolkit-scroll-bars 'CFLAGS=3D-g -O2 -fdebug-prefix-map=3D/build/emacs-mEZBk7/emacs-26.3+1=3D.=20 -fstack-protector-strong -Wformat -Werror=3Dformat-security -Wall' 'CPPFLAGS=3D-Wdate-time -D_FORTIFY_SOURCE=3D2' 'LDFLAGS=3D-Wl,-Bsymbolic-functions=20 -Wl,-z,relro'' Configured features: XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND GPM DBUS GSETTINGS=20 GLIB NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT=20 ZLIB TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM THREADS LIBSYSTEMD LCMS2 Important settings: value of $LANG: en_GB.UTF-8 value of $XMODIFIERS: @im=3Dnone locale-coding-system: utf-8-unix Major mode: Lisp Interaction Minor modes in effect: tooltip-mode: t global-eldoc-mode: t eldoc-mode: t electric-indent-mode: t mouse-wheel-mode: t tool-bar-mode: t menu-bar-mode: t file-name-shadow-mode: t global-font-lock-mode: t font-lock-mode: t blink-cursor-mode: t auto-composition-mode: t auto-encryption-mode: t auto-compression-mode: t line-number-mode: t transient-mark-mode: t Load-path shadows: None found. Features: (shadow sort mail-extr emacsbug message rmc puny seq byte-opt gv bytecomp byte-compile cconv cl-loaddefs cl-lib dired=20 dired-loaddefs format-spec rfc822 mml easymenu mml-sec password-cache epa derived=20 epg epg-config gnus-util rmail rmail-loaddefs mm-decode mm-bodies=20 mm-encode mail-parse rfc2231 mailabbrev gmm-utils mailheader sendmail=20 rfc2047 rfc2045 ietf-drums mm-util mail-prsvr mail-utils elec-pair=20 time-date mule-util tooltip eldoc electric uniquify ediff-hook vc-hooks lisp-float-type mwheel term/x-win x-win term/common-win x-dnd=20 tool-bar dnd fontset image regexp-opt fringe tabulated-list replace=20 newcomment text-mode elisp-mode lisp-mode prog-mode register page menu-bar rfn-eshadow isearch timer select scroll-bar mouse jit-lock=20 font-lock syntax facemenu font-core term/tty-colors frame cl-generic cham=20 georgian utf-8-lang misc-lang vietnamese tibetan thai tai-viet lao korean japanese eucjp-ms cp51932 hebrew greek romanian slovak czech=20 european ethiopic indian cyrillic chinese composite charscript charprop case-table epa-hook jka-cmpr-hook help simple abbrev obarray=20 minibuffer cl-preloaded nadvice loaddefs button faces cus-face macroexp files text-properties overlay sha1 md5 base64 format env code-pages mule custom widget hashtable-print-readable backquote threads dbusbind inotify lcms2 dynamic-setting system-font-setting=20 font-render-setting move-toolbar gtk x-toolkit x multi-tty make-network-process emacs) Memory information: ((conses 16 95338 8459) (symbols 48 20386 1) (miscs 40 50 168) (strings 32 28445 1160) (string-bytes 1 747812) (vectors 16 13900) (vector-slots 8 500980 11290) (floats 8 51 264) (intervals 56 301 25) (buffers 992 12)) --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEO/eF3hYsAMj7Tab9uhNZqCwLPvkFAl7NQ9wACgkQuhNZqCwL PvnI3g//fDYKiUcyxn3W/fHed3y3cjPc1HkkB/0o5pnwfe+zK2W7Ldp2Q/xZwpE3 P2mPXDMIUzxP8XgIUR/IgyMWJytTKE68ifUuy9WT8iRPjoNSq7U7JtbM/1xUUzlJ 3735l1X4MPcrX2MwV27oqVb52a2UZLVlL5+9GYu1Wr5UeTTx9Mzm5RmcI009dtp5 C8QkP4/uls+U/hEsk0tNKocMROMzDX3K3J7tFe4KlIkIktjU8A9Fc0cmCfOnKsR3 SjHeyKhfRnFAmarrrAXhTduFN3lCfBh2HK+MpeoZ5ba4f+RQpjRPmuBdwWeuGMtQ Oy0Bhx4Q3iMyd1zezDy2p3ax/qyhyiHgWk9EPo7T5T0ILEvpA3XuPRyStux4gEX8 Fxcaf9r8va/n++if4hY/oJmATMmWNfjFM1p3gPM4CMDUPdd1tORqvDvUdKFeCs/7 dYYQ0keUuGDNyBkqvxrZT1dpvrGky2pg+YSOy2tVNdDQjC3x1N8kXMDn3LMlAmp+ ZEXzdMqrHyodIzLf3eIaejqmnNb/wWmpOcD9O1StQGS81AvFL89qc0cqPqEAUScl FG9Ot3EF5tAKap/TxScgLdSpJjEDrh7zvWAXMRsikXSCsVPgybXM0Ju1INLXWveR cEn6kKpc574TqroYYqnse6rmrAamh+ev3xGg9ukvw+kYFCSou/4= =HoyA -----END PGP SIGNATURE----- --=-=-=--
Simon Pugnet <simon@HIDDEN>:bug-gnu-emacs@HIDDEN.
Full text available.bug-gnu-emacs@HIDDEN:bug#41544; Package emacs.
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