kc3-lang/angle

2018-11-09T14:51:46

Vulkan: Emulate Luminance/Alpha with R8G8B8A8 TextureVk::copySubTextureImpl uses the format's pixelReadFunction and pixelWriteFunction and was using the angle format (i.e. the format the texture was created with) instead of the texture format (i.e. the actual format used by the backend) to read and write pixels. This was specifically to make Luminance/Alpha formats work. However, this was incorrect for any emulated format. This commit fixes the function to use the texture format. To avoid issues with Luminance/Alpha, this commit patches the pixel read/write changes for these formats before using them. Bug: angleproject:2913 Change-Id: I8981882b98502d869156a879bb7b5994943ecd8e Reviewed-on: https://chromium-review.googlesource.com/c/1330261 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>