230619 2021-09-22 06:14:52 -0700 WebGL premultiplied: false is composited as premultiplied 2022-04-22 00:23:55 -0700 1 1 1 Unclassified WebKit WebGL WebKit Local Build Unspecified Unspecified RESOLVED DUPLICATE 200026 https://bugs.webkit.org/show_bug.cgi?id=230613 InRadar P2 Normal --- 230620 1 kkinnunen kkinnunen dino gman kbr kkinnunen webkit-bug-importer oldest_to_newest 1796033 0 kkinnunen 2021-09-22 06:14:52 -0700 WebGL premultiplied: false is composited as premultiplied Colors seem to be wrong 1796265 1 kbr 2021-09-22 16:31:21 -0700 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 1798283 2 webkit-bug-importer 2021-09-29 06:15:14 -0700 <rdar://problem/83668315> 1862099 3 gman 2022-04-16 19:41:56 -0700 same as this issue? https://bugs.webkit.org/show_bug.cgi?id=200026 1863564 4 kkinnunen 2022-04-22 00:23:55 -0700 *** This bug has been marked as a duplicate of bug 200026 ***