Replace fWillReadFragmentPosition with a bitfield

src/gpu/effects/GrConvexPolyEffect.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrConvexPolyEffect.h"
 #include "GrInvariantOutput.h"
 #include "SkPathPriv.h"
@@ skipping 14 matching lines @@
     GrPrimitiveEdgeType getEdgeType() const { return fEdgeType; }
 
     const char* name() const override { return "AARect"; }
 
     void onGetGLSLProcessorKey(const GrGLSLCaps&, GrProcessorKeyBuilder*) const override;
 
 private:
     AARectEffect(GrPrimitiveEdgeType edgeType, const SkRect& rect)
         : fRect(rect), fEdgeType(edgeType) {
         this->initClassID<AARectEffect>();
-        this->setWillReadFragmentPosition();
+        this->enableBuiltInState(kFragmentPosition_BuiltInState);
     }
 
     GrGLSLFragmentProcessor* onCreateGLSLInstance() const override;
 
     bool onIsEqual(const GrFragmentProcessor& other) const override {
         const AARectEffect& aare = other.cast<AARectEffect>();
         return fRect == aare.fRect;
     }
 
     void onComputeInvariantOutput(GrInvariantOutput* inout) const override {
@@ skipping 268 matching lines @@
     , fEdgeCount(n) {
     this->initClassID<GrConvexPolyEffect>();
     // Factory function should have already ensured this.
     SkASSERT(n <= kMaxEdges);
     memcpy(fEdges, edges, 3 * n * sizeof(SkScalar));
     // Outset the edges by 0.5 so that a pixel with center on an edge is 50% covered in the AA case
     // and 100% covered in the non-AA case.
     for (int i = 0; i < n; ++i) {
         fEdges[3 * i + 2] += SK_ScalarHalf;
     }
-    this->setWillReadFragmentPosition();
+    this->enableBuiltInState(kFragmentPosition_BuiltInState);
 }
 
 bool GrConvexPolyEffect::onIsEqual(const GrFragmentProcessor& other) const {
     const GrConvexPolyEffect& cpe = other.cast<GrConvexPolyEffect>();
     // ignore the fact that 0 == -0 and just use memcmp.
     return (cpe.fEdgeType == fEdgeType && cpe.fEdgeCount == fEdgeCount &&
             0 == memcmp(cpe.fEdges, fEdges, 3 * fEdgeCount * sizeof(SkScalar)));
 }
 
 //////////////////////////////////////////////////////////////////////////////
 
 GR_DEFINE_FRAGMENT_PROCESSOR_TEST(GrConvexPolyEffect);
 
 const GrFragmentProcessor* GrConvexPolyEffect::TestCreate(GrProcessorTestData* d) {
     int count = d->fRandom->nextULessThan(kMaxEdges) + 1;
     SkScalar edges[kMaxEdges * 3];
     for (int i = 0; i < 3 * count; ++i) {
         edges[i] = d->fRandom->nextSScalar1();
     }
 
     GrFragmentProcessor* fp;
     do {
         GrPrimitiveEdgeType edgeType = static_cast<GrPrimitiveEdgeType>(
                 d->fRandom->nextULessThan(kGrProcessorEdgeTypeCnt));
         fp = GrConvexPolyEffect::Create(edgeType, count, edges);
     } while (nullptr == fp);
     return fp;
 }