Make GrSimpleMeshDrawOpHelper record whether coverage can be implemented as alpha

This also makes the blend table entry for opaque src over indicate a blend of (1, ISA) rather than (1, 0) to match the actual implementation of the global src-over XP.
Change-Id: I1b1f64d2546e4f0cf03c0239ce674d1baad655f6
Reviewed-on: https://skia-review.googlesource.com/18521
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>

1 files changed, 5 insertions, 4 deletions

diff --git a/src/gpu/GrProcessorAnalysis.h b/src/gpu/GrProcessorAnalysis.h
index ad56ab4e2d..f5e4065ac2 100644
--- a/src/gpu/GrProcessorAnalysis.h
+++ b/src/gpu/GrProcessorAnalysis.h
@@ -117,16 +117,17 @@ public:
 
     /**
      * Are all the fragment processors compatible with conflating coverage with color prior to the
-     * the first fragment processor. This result does not consider processors that should be
-     * eliminated as indicated by initialProcessorsToEliminate().
+     * the first fragment processor. This result assumes that processors that should be eliminated
+     * as indicated by initialProcessorsToEliminate() are in fact eliminated.
      */
     bool allProcessorsCompatibleWithCoverageAsAlpha() const {
         return fAllProcessorsCompatibleWithCoverageAsAlpha;
     }
 
     /**
-     * Do any of the fragment processors require local coords. This result does not consider
-     * processors that should be eliminated as indicated by initialProcessorsToEliminate().
+     * Do any of the fragment processors require local coords. This result assumes that
+     * processors that should be eliminated as indicated by initialProcessorsToEliminate() are in
+     * fact eliminated.
      */
     bool usesLocalCoords() const { return fUsesLocalCoords; }