Add test for reading back from unpremul texture image
The unpremul->unpremul readback doesn't work today. GrSurfaceContext doesn't track an alpha type and whenever we read into an unpremul buffer we unpremul the texture's colors since we assume they were premuled.
Bug: 7580
Change-Id: I307a168799f27b2015e082cf6adde26b906cfe2b
Reviewed-on: https://skia-review.googlesource.com/103780
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
2 files changed