avoid redundant clamps

If we clamp the shader color to gamut, we won't need to clamp again when
storing to the destination... blending and coverage will keep the color
in gamut.

Change-Id: I9a4eb609de58fc0cb6295df0ad1c4cef8cd7e307
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/253722
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
1 file changed