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make coverage a Color

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Just a little no-op refactor.  Makes more sense to group clusters of
red,green,blue,alpha channel values into Colors.

Change-Id: I83ab628d008d68ca6d22d97f3ddd155d3e36f949
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/232821
Commit-Queue: Mike Klein <mtklein@google.com>
Reviewed-by: Herb Derby <herb@google.com>
Reviewed-by: Mike Reed <reed@google.com>
This commit is contained in:
Mike Klein 2019-08-06 16:51:37 -04:00 committed by Skia Commit-Bot
parent 41974000e2
commit e7f3850a0a
1 changed files with 12 additions and 15 deletions
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27
src/core/SkVMBlitter.cpp
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@ -203,35 +203,32 @@ namespace {
// Lerp with coverage if needed.
bool apply_coverage = true;
skvm::I32 cr,cg,cb,ca;
Color cov;
switch (key.coverage) {
case Coverage::Full: apply_coverage = false;
break;
case Coverage::UniformA8: cr = cg = cb = ca =
case Coverage::UniformA8: cov.r = cov.g = cov.b = cov.a =
uniform8(uniforms, offsetof(Uniforms, coverage));
break;
case Coverage::MaskA8: cr = cg = cb = ca =
case Coverage::MaskA8: cov.r = cov.g = cov.b = cov.a =
load8(varying<uint8_t>());
break;
case Coverage::MaskLCD16: {
Color cov = unpack_565(load16(varying<uint16_t>()));
cr = cov.r;
cg = cov.g;
cb = cov.b;
ca = select(lt(src.a, dst.a), min(cr, min(cg,cb))
, max(cr, max(cg,cb)));
} break;
case Coverage::MaskLCD16:
cov = unpack_565(load16(varying<uint16_t>()));
cov.a = select(lt(src.a, dst.a), min(cov.r, min(cov.g,cov.b))
, max(cov.r, max(cov.g,cov.b)));
break;
case Coverage::Mask3D: TODO;
}
if (apply_coverage) {
src.r = mix(dst.r, src.r, cr);
src.g = mix(dst.g, src.g, cg);
src.b = mix(dst.b, src.b, cb);
src.a = mix(dst.a, src.a, ca);
src.r = mix(dst.r, src.r, cov.r);
src.g = mix(dst.g, src.g, cov.g);
src.b = mix(dst.b, src.b, cov.b);
src.a = mix(dst.a, src.a, cov.a);
}
if (force_opaque) { src.a = splat(0xff); }