Add more specialized fragment builders

src/gpu/effects/GrConfigConversionEffect.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 "GrConfigConversionEffect.h"
 #include "GrContext.h"
 #include "GrDrawContext.h"
 #include "GrInvariantOutput.h"
 #include "GrSimpleTextureEffect.h"
 #include "SkMatrix.h"
 #include "glsl/GrGLSLFragmentProcessor.h"
 #include "glsl/GrGLSLFragmentShaderBuilder.h"
 
 class GrGLConfigConversionEffect : public GrGLSLFragmentProcessor {
 public:
     void emitCode(EmitArgs& args) override {
         const GrConfigConversionEffect& cce = args.fFp.cast<GrConfigConversionEffect>();
         const GrSwizzle& swizzle = cce.swizzle();
         GrConfigConversionEffect::PMConversion pmConversion = cce.pmConversion();
 
         // Using highp for GLES here in order to avoid some precision issues on specific GPUs.
         GrGLSLShaderVar tmpVar("tmpColor", kVec4f_GrSLType, 0, kHigh_GrSLPrecision);
         SkString tmpDecl;
         tmpVar.appendDecl(args.fGLSLCaps, &tmpDecl);
 
-        GrGLSLFragmentBuilder* fragBuilder = args.fFragBuilder;
+        GrGLSLFPFragmentBuilder* fragBuilder = args.fFragBuilder;
 
         fragBuilder->codeAppendf("%s;", tmpDecl.c_str());
 
         fragBuilder->codeAppendf("%s = ", tmpVar.c_str());
         fragBuilder->appendTextureLookup(args.fSamplers[0], args.fCoords[0].c_str(),
                                        args.fCoords[0].getType());
         fragBuilder->codeAppend(";");
 
         if (GrConfigConversionEffect::kNone_PMConversion == pmConversion) {
             SkASSERT(GrSwizzle::RGBA() != swizzle);
@@ skipping 256 matching lines @@
     } else {
         if (kRGBA_8888_GrPixelConfig != texture->config() &&
             kBGRA_8888_GrPixelConfig != texture->config() &&
             kNone_PMConversion != pmConversion) {
             // The PM conversions assume colors are 0..255
             return nullptr;
         }
         return new GrConfigConversionEffect(texture, swizzle, pmConversion, matrix);
     }
 }