Add more specialized fragment builders

src/gpu/glsl/GrGLSLFragmentProcessor.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLSLFragmentProcessor_DEFINED
 #define GrGLSLFragmentProcessor_DEFINED
 
 #include "glsl/GrGLSLProcessorTypes.h"
 #include "glsl/GrGLSLProgramDataManager.h"
 #include "glsl/GrGLSLTextureSampler.h"
 
 class GrProcessor;
 class GrProcessorKeyBuilder;
 class GrGLSLCaps;
 class GrGLSLFPBuilder;
-class GrGLSLFragmentBuilder;
+class GrGLSLFPFragmentBuilder;
 class GrGLSLUniformHandler;
 
 class GrGLSLFragmentProcessor {
 public:
     GrGLSLFragmentProcessor() {}
 
     virtual ~GrGLSLFragmentProcessor() {
         for (int i = 0; i < fChildProcessors.count(); ++i) {
             delete fChildProcessors[i];
         }
@@ skipping 15 matching lines @@
                             nullptr in which case the implied input is solid white (all ones).
                             TODO: Better system for communicating optimization info (e.g. input
                             color is solid white, trans black, known to be opaque, etc.) that allows
                             the processor to communicate back similar known info about its output.
         @param samplers     Contains one entry for each GrTextureAccess of the GrProcessor. These
                             can be passed to the builder to emit texture reads in the generated
                             code.
      */
 
     struct EmitArgs {
-        EmitArgs(GrGLSLFragmentBuilder* fragBuilder,
+        EmitArgs(GrGLSLFPFragmentBuilder* fragBuilder,
                  GrGLSLUniformHandler* uniformHandler,
                  const GrGLSLCaps* caps,
                  const GrFragmentProcessor& fp,
                  const char* outputColor,
                  const char* inputColor,
                  const GrGLSLTransformedCoordsArray& coords,
                  const TextureSamplerArray& samplers)
             : fFragBuilder(fragBuilder)
             , fUniformHandler(uniformHandler)
             , fGLSLCaps(caps)
             , fFp(fp)
             , fOutputColor(outputColor)
             , fInputColor(inputColor)
             , fCoords(coords)
             , fSamplers(samplers) {}
-        GrGLSLFragmentBuilder* fFragBuilder;
+        GrGLSLFPFragmentBuilder* fFragBuilder;
         GrGLSLUniformHandler* fUniformHandler;
         const GrGLSLCaps* fGLSLCaps;
         const GrFragmentProcessor& fFp;
         const char* fOutputColor;
         const char* fInputColor;
         const GrGLSLTransformedCoordsArray& fCoords;
         const TextureSamplerArray& fSamplers;
     };
 
     virtual void emitCode(EmitArgs&) = 0;
@@ skipping 33 matching lines @@
 
 private:
     void internalEmitChild(int, const char*, const char*, EmitArgs&);
 
     SkTArray<GrGLSLFragmentProcessor*, true> fChildProcessors;
 
     friend class GrFragmentProcessor;
 };
 
 #endif