GNU bug report logs - #32469
26.1; windows 10 emacs doesn't draw *some* pngs correctly

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From: Stefan Kangas <stefan <at> marxist.se>
To: james <at> jojojames.com
Cc: Lars Ingebrigtsen <larsi <at> gnus.org>, 32469 <at> debbugs.gnu.org
Subject: bug#32469: 26.1; windows 10 emacs doesn't draw *some* pngs correctly
Date: Sat, 02 Nov 2019 01:57:15 +0100

Hi James,

The below discussion was in July.  Did you find any time to check if
this is still an issue on the Emacs trunk?

Best regards,
Stefan Kangas

james <at> jojojames.com writes:

> It’ll take me a while to check for this.
>
>> On Jul 12, 2019, at 7:52 PM, Lars Ingebrigtsen <larsi <at> gnus.org> wrote:
>> 
>> James Nguyen <james <at> jojojames.com> writes:
>> 
>>> https://github.com/jojojames/emacs-windows-png-repro
>>> 
>>> Added some screenshots here^
>>> 
>>> Pngs created using imagemagick from svg files do not display correctly
>>> in Emacs (they do not display transparency correctly). In the linked
>>> repro, the images are surrounded with a yellow/orange instead of transparency.
>>> 
>>> The images display with transparency in other Windows programs I
>>> tried. (Web browser, File browser, default image viewer in Windows.)
>>> These images also display correctly on OSX (and its various
>>> applications, including Emacs).
>>> 
>>> After playing around with the imagemagick setting, it seems prefixing
>>> PNG32: to the output file makes the image compatible with Windows Emacs.
>> 
>> The image handling has been reworked substantially over the last few
>> months -- are you still seeing this on the Emacs trunk?
>> 
>>> In GNU Emacs 27.0.50 (build 1, x86_64-w64-mingw32)
>>> of 2018-05-03 built on CIRROCUMULUS
>> 
>> -- 
>> (domestic pets only, the antidote for overdose, milk.)
>>   bloggy blog: http://lars.ingebrigtsen.no

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