tree 1a2e78809d4a6b8329fb9e3fd2815f01980e5333
parent 09dbeff19a9d6c26c3ae25b8ff973850ddc12c17
author Greg Daniel <egdaniel@google.com> 1593537233 -0400
committer Skia Commit-Bot <skia-commit-bot@chromium.org> 1593543417 +0000

Fix d3d backend texture uploads when used formats need swizzling.

This does a few things. First when we are trying to upload a color via
our updateBackendTexture API we use GrClearImage to fill out a cpu buffer
with that data. But we need to know how to swizzle this cpu data so that
it falls into the correct channels when we copy it to the GPU texture.
This requires adding a couple more color types to handle some of the odd
4444 cases which are swizzled differently and what seems every backend.
We then can get the correct swizzle for the GrClearImage call.

This change also fixes the DXGI_FORMAT_B4G4R4A4_UNORM read and write swizzles.

In follow on change I will update other APIs which use GrClearImage to make
sure they are using the correct GrColorType to represent their internal
formats memory layout.

Change-Id: I92d1d7728dc6e317553e04c1ecfcd872f95a5f99
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/299865
Reviewed-by: Jim Van Verth <jvanverth@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>