RESOLVED DUPLICATE of bug 200026 230619
WebGL premultiplied: false is composited as premultiplied 
https://bugs.webkit.org/show_bug.cgi?id=230619
Summary WebGL premultiplied: false is composited as premultiplied
Kimmo Kinnunen
Reported 2021-09-22 06:14:52 PDT
WebGL premultiplied: false is composited as premultiplied Colors seem to be wrong
Attachments
Add attachment proposed patch, testcase, etc.
Kenneth Russell
Comment 1 2021-09-22 16:31:21 PDT
In Chromium it was necessary to maintain a separate texture for the WebGL rendering results in {premultipliedAlpha:false} mode, and perform a blit at the end to get them into premultiplied mode for compositing. In case it's useful, please search for "premultiplied_alpha_false_texture_" in: https://source.chromium.org/chromium/chromium/src/+/main:third_party/blink/renderer/platform/graphics/gpu/drawing_buffer.cc
Radar WebKit Bug Importer
Comment 2 2021-09-29 06:15:14 PDT
<rdar://problem/83668315>
Gregg Tavares
Comment 3 2022-04-16 19:41:56 PDT
same as this issue? https://bugs.webkit.org/show_bug.cgi?id=200026
Kimmo Kinnunen
Comment 4 2022-04-22 00:23:55 PDT
*** This bug has been marked as a duplicate of bug 200026 ***
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