GNU logs - #70697, boring messages

Message sent to bug-gnu-emacs@HIDDEN:

Subject: bug#70697: 30.0.50; Frame parameter alpha-background is ignored for fringe bitmaps & internal borders
Resent-From: Aleksandar Dimitrov <mail@HIDDEN>
Original-Sender: "Debbugs-submit" <debbugs-submit-bounces <at> debbugs.gnu.org>
Resent-CC: bug-gnu-emacs@HIDDEN
Resent-Date: Wed, 01 May 2024 12:02:02 +0000
Resent-Message-ID: <handler.70697.B.171456492112450 <at> debbugs.gnu.org>
Resent-Sender: help-debbugs@HIDDEN
To: 70697 <at> debbugs.gnu.org
Feedback-ID: i3ed944d6:Fastmail
From: Aleksandar Dimitrov <mail@HIDDEN>
User-Agent: mu4e 1.12.1; emacs 30.0.50
Date: Wed, 01 May 2024 12:52:58 +0200
Message-ID: <871q6liz1x.fsf@HIDDEN>
MIME-Version: 1.0
Content-Type: text/plain
Received-SPF: pass client-ip=64.147.123.154; envelope-from=mail@HIDDEN;
 helo=wfhigh3-smtp.messagingengine.com
X-Spam_score_int: -27
X-Spam_score: -2.8
X-Spam_bar: --
X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1,
 DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1,
 RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_PASS=-0.001,
 SPF_PASS=-0.001 autolearn=ham autolearn_force=no
X-Spam_action: no action
X-Spam-Score: 0.7 (/)
X-Mailman-Approved-At: Wed, 01 May 2024 08:01:53 -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: -0.3 (/)

Hi all,

Runinng in any compositing window manager (this includes Wayland with a
PGTK build of Emacs, but also X without PGTK), the frame parameter
alpha-background is ignored for at least

- fringe bitmaps
- insets drawn with internal-border-width

The resulting visual effect is quite jarring, and makes both of these
difficult to use together with transparency.

Here's a small emacs -Q script to exhibit the problem:

#+begin_src emacs-lisp

;; Turn off scroll bars to make the bugs more visible.
(scroll-bar-mode -1)

;; set transparency & internal border width.
;; Note how the internal border is going to be drawn in a solid white colour
;; and will ignore the alpha value.
(modify-all-frames-parameters '((alpha-background . 50)
                                (internal-border-width . 20)))

(define-fringe-bitmap 'test-bitmap
  (vector (expt 2 15)) nil 16 '(top t))

;; Define a face for the fringe that has a different background colour, to
;; more easily discern the fringe bitmap bug from the internal border bug.
(make-face 'test-face)
(set-face-attribute 'test-face nil :background "pink")

;; Apply a fringe bitmap to all lines in the current buffer. Note how the fringe
;; bitmap is monochrome, but the background colour ignores the global alpha value.
(defun apply-fringe-bitmap ()
  "Apply a fringe bitmap to the current buffer to exhibit the transparency bug."
  (add-text-properties
   (point-min) (point-max)
   '(wrap-prefix
     #(" " 0 1 (display (left-fringe test-bitmap test-face)))
     line-prefix
     #(" " 0 1 (display (left-fringe test-bitmap test-face))))))

(add-hook 'emacs-startup-hook #'apply-fringe-bitmap)

#+end_src


And here's how it looks like: https://aleks.bg/emacs-bug.png
(that's my personal home page, not an image hoster.)

I would expect the white border around the frame to also be transparent,
and the fringe, too.


Aleks

Message sent:

Content-Disposition: inline
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-Mailer: MIME-tools 5.505 (Entity 5.505)
Content-Type: text/plain; charset=utf-8
X-Loop: help-debbugs@HIDDEN
From: help-debbugs@HIDDEN (GNU bug Tracking System)
To: Aleksandar Dimitrov <mail@HIDDEN>
Subject: bug#70697: Acknowledgement (30.0.50; Frame parameter
 alpha-background is ignored for fringe bitmaps & internal borders)
Message-ID: <handler.70697.B.171456492112450.ack <at> debbugs.gnu.org>
References: <871q6liz1x.fsf@HIDDEN>
X-Gnu-PR-Message: ack 70697
X-Gnu-PR-Package: emacs
Reply-To: 70697 <at> debbugs.gnu.org
Date: Wed, 01 May 2024 12:02:03 +0000

Thank you for filing a new bug report with debbugs.gnu.org.

This is an automatically generated reply to let you know your message
has been received.

Your message is being forwarded to the package maintainers and other
interested parties for their attention; they will reply in due course.

Your message has been sent to the package maintainer(s):
 bug-gnu-emacs@HIDDEN

If you wish to submit further information on this problem, please
send it to 70697 <at> debbugs.gnu.org.

Please do not send mail to help-debbugs@HIDDEN unless you wish
to report a problem with the Bug-tracking system.

--=20
70697: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=3D70697
GNU Bug Tracking System
Contact help-debbugs@HIDDEN with problems

Last modified: Wed, 1 May 2024 12:15:01 UTC

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997 nCipher Corporation Ltd, 1994-97 Ian Jackson.