Add more specialized fragment builders

src/gpu/effects/GrXfermodeFragmentProcessor.cpp

 /*
 * Copyright 2015 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
 
 #include "effects/GrXfermodeFragmentProcessor.h"
 
 #include "GrFragmentProcessor.h"
@@ skipping 69 matching lines @@
 }
 
 GrGLSLFragmentProcessor* ComposeTwoFragmentProcessor::onCreateGLSLInstance() const{
     return new GLComposeTwoFragmentProcessor;
 }
 
 /////////////////////////////////////////////////////////////////////
 
 void GLComposeTwoFragmentProcessor::emitCode(EmitArgs& args) {
 
-    GrGLSLFragmentBuilder* fragBuilder = args.fFragBuilder;
+    GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
     const ComposeTwoFragmentProcessor& cs = args.fFp.cast<ComposeTwoFragmentProcessor>();
 
     const char* inputColor = nullptr;
     if (args.fInputColor) {
         inputColor = "inputColor";
         fragBuilder->codeAppendf("vec4 inputColor = vec4(%s.rgb, 1.0);", args.fInputColor);
     }
 
     // declare outputColor and emit the code for each of the two children
     SkString srcColor("src");
@@ skipping 120 matching lines @@
     GR_DECLARE_FRAGMENT_PROCESSOR_TEST;
 
     typedef GrFragmentProcessor INHERITED;
 };
 
 //////////////////////////////////////////////////////////////////////////////
 
 class GLComposeOneFragmentProcessor : public GrGLSLFragmentProcessor {
 public:
     void emitCode(EmitArgs& args) override {
-        GrGLSLFragmentBuilder* fragBuilder = args.fFragBuilder;
+        GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
         SkXfermode::Mode mode = args.fFp.cast<ComposeOneFragmentProcessor>().mode();
         ComposeOneFragmentProcessor::Child child =
             args.fFp.cast<ComposeOneFragmentProcessor>().child();
         SkString childColor("child");
         this->emitChild(0, nullptr, &childColor, args);
 
         const char* inputColor = args.fInputColor;
         // We don't try to optimize for this case at all
         if (!inputColor) {
             fragBuilder->codeAppendf("const vec4 ones = vec4(1);");
@@ skipping 57 matching lines @@
         case SkXfermode::kClear_Mode:
             return GrConstColorProcessor::Create(GrColor_TRANSPARENT_BLACK,
                                                  GrConstColorProcessor::kIgnore_InputMode);
         case SkXfermode::kDst_Mode:
             return nullptr;
         default:
             return new ComposeOneFragmentProcessor(src, mode,
                                                    ComposeOneFragmentProcessor::kSrc_Child);
     }
 }