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, 11 insertions, 8 deletions

diff --git a/src/gpu/GrProcessorAnalysis.cpp b/src/gpu/GrProcessorAnalysis.cpp
index 317246d247..118e93da0b 100644
--- a/src/gpu/GrProcessorAnalysis.cpp
+++ b/src/gpu/GrProcessorAnalysis.cpp
@@ -27,14 +27,17 @@ void GrColorFragmentProcessorAnalysis::analyzeProcessors(
             // processors.
             fAllProcessorsCompatibleWithCoverageAsAlpha = true;
             fUsesLocalCoords = false;
-        } else if (fIsOpaque && !fp->preservesOpaqueInput()) {
-            fIsOpaque = false;
-        }
-        if (fAllProcessorsCompatibleWithCoverageAsAlpha && !fp->compatibleWithCoverageAsAlpha()) {
-            fAllProcessorsCompatibleWithCoverageAsAlpha = false;
-        }
-        if (fp->usesLocalCoords()) {
-            fUsesLocalCoords = true;
+        } else {
+            if (fIsOpaque && !fp->preservesOpaqueInput()) {
+                fIsOpaque = false;
+            }
+            if (fAllProcessorsCompatibleWithCoverageAsAlpha &&
+                !fp->compatibleWithCoverageAsAlpha()) {
+                fAllProcessorsCompatibleWithCoverageAsAlpha = false;
+            }
+            if (fp->usesLocalCoords()) {
+                fUsesLocalCoords = true;
+            }
         }
         ++fTotalProcessorsVisited;
     }