Implement support for mixed sampled render targets

src/gpu/GrProcOptInfo.h

Index: src/gpu/GrProcOptInfo.h
diff --git a/src/gpu/GrProcOptInfo.h b/src/gpu/GrProcOptInfo.h
index 059bca4dd8b8762b9879e95eb7c2d90844f0dd98..9b3076fffb9f528ff19fedd69534bb319d30c020 100644
--- a/src/gpu/GrProcOptInfo.h
+++ b/src/gpu/GrProcOptInfo.h
@@ -29,7 +29,8 @@ public:
         , fFirstEffectStageIndex(0)
         , fInputColorIsUsed(true)
         , fInputColor(0)
-        , fReadsFragPosition(false) {}
+        , fReadsFragPosition(false)
+        , fNeedsCoverageModulation(false) {}
 
     void calcWithInitialValues(const GrFragmentStage*, int stageCount, GrColor startColor,
                                GrColorComponentFlags flags, bool areCoverageStages);
@@ -53,6 +54,12 @@ public:
     bool isFourChannelOutput() const { return !fInOut.isSingleComponent() &&
                                                fInOut.isLCDCoverage(); }
 
+    bool needsCoverageModulation() const { return fNeedsCoverageModulation; }
+
+    void setNeedsCoverageModulation(bool modulate) {
+        fNeedsCoverageModulation = true;
+    }
+
     GrColor color() const { return fInOut.color(); }
     uint8_t validFlags() const { return fInOut.validFlags(); }
 
@@ -92,6 +99,7 @@ private:
     bool fInputColorIsUsed;
     GrColor fInputColor;
     bool fReadsFragPosition;
+    bool fNeedsCoverageModulation;
 };
 
 #endif