Added GrGLFragmentProcessor::EmitArgs struct for use with emitCode()

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 "gl/GrGLFragmentProcessor.h"
 #include "gl/builders/GrGLProgramBuilder.h"
 
 class GrGLConfigConversionEffect : public GrGLFragmentProcessor {
 public:
     GrGLConfigConversionEffect(const GrProcessor& processor) {
         const GrConfigConversionEffect& configConversionEffect =
                 processor.cast<GrConfigConversionEffect>();
         fSwapRedAndBlue = configConversionEffect.swapsRedAndBlue();
         fPMConversion = configConversionEffect.pmConversion();
     }
 
-    virtual void emitCode(GrGLFPBuilder* builder,
-                          const GrFragmentProcessor&,
-                          const char* outputColor,
-                          const char* inputColor,
-                          const TransformedCoordsArray& coords,
-                          const TextureSamplerArray& samplers) override {
+    virtual void emitCode(EmitArgs& args) override {
         // Using highp for GLES here in order to avoid some precision issues on specific GPUs.
         GrGLShaderVar tmpVar("tmpColor", kVec4f_GrSLType, 0, kHigh_GrSLPrecision);
         SkString tmpDecl;
-        tmpVar.appendDecl(builder->ctxInfo(), &tmpDecl);
+        tmpVar.appendDecl(args.fBuilder->ctxInfo(), &tmpDecl);
 
-        GrGLFragmentBuilder* fsBuilder = builder->getFragmentShaderBuilder();
+        GrGLFragmentBuilder* fsBuilder = args.fBuilder->getFragmentShaderBuilder();
 
         fsBuilder->codeAppendf("%s;", tmpDecl.c_str());
 
         fsBuilder->codeAppendf("%s = ", tmpVar.c_str());
-        fsBuilder->appendTextureLookup(samplers[0], coords[0].c_str(), coords[0].getType());
+        fsBuilder->appendTextureLookup(args.fSamplers[0], args.fCoords[0].c_str(),
+                                       args.fCoords[0].getType());
         fsBuilder->codeAppend(";");
 
         if (GrConfigConversionEffect::kNone_PMConversion == fPMConversion) {
             SkASSERT(fSwapRedAndBlue);
-            fsBuilder->codeAppendf("%s = %s.bgra;", outputColor, tmpVar.c_str());
+            fsBuilder->codeAppendf("%s = %s.bgra;", args.fOutputColor, tmpVar.c_str());
         } else {
             const char* swiz = fSwapRedAndBlue ? "bgr" : "rgb";
             switch (fPMConversion) {
                 case GrConfigConversionEffect::kMulByAlpha_RoundUp_PMConversion:
                     fsBuilder->codeAppendf(
                         "%s = vec4(ceil(%s.%s * %s.a * 255.0) / 255.0, %s.a);",
                         tmpVar.c_str(), tmpVar.c_str(), swiz, tmpVar.c_str(), tmpVar.c_str());
                     break;
                 case GrConfigConversionEffect::kMulByAlpha_RoundDown_PMConversion:
                     // Add a compensation(0.001) here to avoid the side effect of the floor operation.
@@ skipping 11 matching lines @@
                     break;
                 case GrConfigConversionEffect::kDivByAlpha_RoundDown_PMConversion:
                     fsBuilder->codeAppendf(
                         "%s = %s.a <= 0.0 ? vec4(0,0,0,0) : vec4(floor(%s.%s / %s.a * 255.0) / 255.0, %s.a);",
                         tmpVar.c_str(), tmpVar.c_str(), tmpVar.c_str(), swiz, tmpVar.c_str(), tmpVar.c_str());
                     break;
                 default:
                     SkFAIL("Unknown conversion op.");
                     break;
             }
-            fsBuilder->codeAppendf("%s = %s;", outputColor, tmpVar.c_str());
+            fsBuilder->codeAppendf("%s = %s;", args.fOutputColor, tmpVar.c_str());
         }
         SkString modulate;
-        GrGLSLMulVarBy4f(&modulate, outputColor, inputColor);
+        GrGLSLMulVarBy4f(&modulate, args.fOutputColor, args.fInputColor);
         fsBuilder->codeAppend(modulate.c_str());
     }
 
     static inline void GenKey(const GrProcessor& processor, const GrGLSLCaps&,
                               GrProcessorKeyBuilder* b) {
         const GrConfigConversionEffect& conv = processor.cast<GrConfigConversionEffect>();
         uint32_t key = (conv.swapsRedAndBlue() ? 0 : 1) | (conv.pmConversion() << 1);
         b->add32(key);
     }
 
@@ skipping 222 matching lines @@
             // The PM conversions assume colors are 0..255
             return NULL;
         }
         return SkNEW_ARGS(GrConfigConversionEffect, (procDataManager,
                                                      texture,
                                                      swapRedAndBlue,
                                                      pmConversion,
                                                      matrix));
     }
 }