bug#32469: 26.1; windows 10 emacs doesn't draw *some* pngs correctly

[Lars Ingebrigtsen]

James Nguyen <james@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