This begins the journey towards using different types to refer to CPU data and GPU texture formats. This is one part of removing GrPixelConfig and more directly using GL/VK texture formats
GrColorType represents a particular layout of color/gray/alpha channels in CPU memory. It does not refer to texture formats or sRGB-encoding. It is basically SkColorType specialized to the GPU backend with some formats added and some removed.
Read/WritePixel interfaces use GrColorType to describe the CPU side of the transaction.
There's still a lot of punting to GrPixelConfig in API-specific code. There's a lot more to be done.
Bug: 6718
Bug: 7580
Change-Id: I8d813ae9a4416a06596f22a4b87da02091989718
Reviewed-on: https://skia-review.googlesource.com/107264
Commit-Queue: Brian Salomon <bsalomon@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
c320b15768