Make XPFragmentBuilder only Builder with access to DstCopy.

gm/dcshader.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 "gm.h"
 #if SK_SUPPORT_GPU
@@ skipping 53 matching lines @@
                             GrProcessorKeyBuilder* b) const override {}
 
     GrGLFragmentProcessor* createGLInstance() const override {
         class DCGLFP : public GrGLFragmentProcessor {
             void emitCode(GrGLFPBuilder* builder,
                             const GrFragmentProcessor& fp,
                             const char* outputColor,
                             const char* inputColor,
                             const TransformedCoordsArray& coords,
                             const TextureSamplerArray& samplers) {
-                GrGLFPFragmentBuilder* fpb = builder->getFragmentShaderBuilder();
+                GrGLFragmentBuilder* fpb = builder->getFragmentShaderBuilder();
                 fpb->codeAppendf("vec2 c = %s;", fpb->ensureFSCoords2D(coords, 0).c_str());
                 fpb->codeAppend("vec2 r = mod(c, vec2(20.0));");
                 fpb->codeAppend("vec4 color = vec4(0.5*sin(c.x / 15.0) + 0.5,"
                                                     "0.5*cos((c.x + c.y) / 15.0) + 0.5,"
                                                     "(r.x + r.y) / 20.0,"
                                                     "distance(r, vec2(15.0)) / 20.0 + 0.2);");
                 fpb->codeAppendf("color.rgb *= color.a;"
                                     "%s = color * %s;",
                                     outputColor, GrGLSLExpr4(inputColor).c_str());
             }
@@ skipping 226 matching lines @@
     };
 
     SkTArray<Prim*> fPrims;
 
     typedef GM INHERITED;
 };
 
 DEF_GM( return SkNEW(DCShaderGM); )
 }
 #endif