Enable caching of texture domain extents

src/gpu/effects/GrTextureDomainEffect.cpp

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrTextureDomainEffect.h"
 #include "GrSimpleTextureEffect.h"
 #include "GrTBackendEffectFactory.h"
@@ skipping 108 matching lines @@
     // vertical flip if necessary
     if (kBottomLeft_GrSurfaceOrigin == texDom.texture(0)->origin()) {
         values[1] = 1.0f - values[1];
         values[3] = 1.0f - values[3];
         // The top and bottom were just flipped, so correct the ordering
         // of elements so that values = (l, t, r, b).
         SkTSwap(values[1], values[3]);
     }
     if (0 != memcmp(values, fPrevDomain, 4 * sizeof(GrGLfloat))) {
         uman.set4fv(fNameUni, 0, 1, values);
+        memcpy(fPrevDomain, values, 4 * sizeof(GrGLfloat));
     }
     fEffectMatrix.setData(uman,
                           texDom.getMatrix(),
                           drawEffect,
                           texDom.texture(0));
 }
 
 GrGLEffect::EffectKey GrGLTextureDomainEffect::GenKey(const GrDrawEffect& drawEffect,
                                                       const GrGLCaps&) {
     const GrTextureDomainEffect& texDom = drawEffect.castEffect<GrTextureDomainEffect>();
@@ skipping 95 matching lines @@
     const SkMatrix& matrix = GrEffectUnitTest::TestMatrix(random);
     bool bilerp = random->nextBool();
     CoordsType coords = random->nextBool() ? kLocal_CoordsType : kPosition_CoordsType;
     return GrTextureDomainEffect::Create(textures[texIdx],
                                          matrix,
                                          domain,
                                          wrapMode,
                                          bilerp,
                                          coords);
 }