Screenspace AA tessellated path rendering.

src/gpu/GrDefaultGeoProcFactory.h

Index: src/gpu/GrDefaultGeoProcFactory.h
diff --git a/src/gpu/GrDefaultGeoProcFactory.h b/src/gpu/GrDefaultGeoProcFactory.h
index f7ddb061fdf57f6d16c342fd544c67bfccf930dd..f1acb98b4d800ea13e31d57a87ba4fd2402b4b79 100644
--- a/src/gpu/GrDefaultGeoProcFactory.h
+++ b/src/gpu/GrDefaultGeoProcFactory.h
@@ -35,7 +35,7 @@ namespace GrDefaultGeoProcFactory {
     struct PositionColorCoverageAttr {
         SkPoint fPosition;
         SkColor fColor;
-        GrColor fCoverage;
+        float   fCoverage;

[Stephen White, 2016/08/30 17:10:51]

Note: I believe this is a bug, but went unnoticed since no one actually
uses these types for assignment (until now). If so, it probably applies
to the other fCoverage values as well, although I didn't change them.

[bsalomon, 2016/08/31 14:19:19]

My read of the code is that the others should all be float as well. Let's go
ahead and do that.

[Stephen White, 2016/08/31 15:16:38]

Done.

     };
 
     struct PositionLocalCoordAttr {