tree 4e60aaa781c41f0ec4ee3db974a6e74a63b945ad
parent c77ba426c4ebfcc18fea0bfa188748995945e154
author Arman Uguray <armansito@google.com> 1712093182 -0700
committer Arman Uguray <armansito@google.com> 1712093182 -0700

[fine] Define the "r8" permutation

The "r8" variant of the fine stage can be used to target storage
textures with the r8unorm texel format. This is specifically intended
to reduce the texture memory required for coverage-mask renderers that
only output 8-bits of coverage-as-alpha in a single channel. This
format is non-standard and requires the an implementation-specific
extension.

Currently this usage requires that any encoded color in a path brush use
only the red channel as the remaning channels will be ignored.