Optimize mipmap downsample_2_2 in sRGB mode
Reland of:
https://skia-review.googlesource.com/c/9386/
Desktop (HP z620)
Before:
mipmap_build_2048x2048_0_gamma 10.5 ms
mipmap_build_2048x2048_1_gamma 77.1 ms
After:
mipmap_build_2048x2048_0_gamma 10.5 ms
mipmap_build_2048x2048_1_gamma 41.0 ms
Pixel XL
Before:
mipmap_build_2048x2048_0_gamma 160 ms
mipmap_build_2048x2048_1_gamma 1.5 s
After:
mipmap_build_2048x2048_0_gamma 160 ms
mipmap_build_2048x2048_1_gamma 570 ms
Also provides marginal performance improvements
for other sRGB downsamples.
CQ_INCLUDE_TRYBOTS=skia.primary:Test-Ubuntu-GCC-ShuttleA-GPU-GTX550Ti-x86_64-Release-Valgrind_PreAbandonGpuContext
BUG=skia:
Change-Id: Ia82fc2ef795e1bb63a4a9deac5e38f5fde39f651
Reviewed-on: https://skia-review.googlesource.com/9455
Reviewed-by: Matt Sarett <msarett@google.com>
4 files changed