Added varying struct

src/gpu/effects/GrCustomCoordsTextureEffect.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrCustomCoordsTextureEffect.h"
 #include "gl/builders/GrGLProgramBuilder.h"
 #include "gl/GrGLProcessor.h"
 #include "gl/GrGLSL.h"
 #include "gl/GrGLTexture.h"
 #include "gl/GrGLGeometryProcessor.h"
 #include "GrTBackendProcessorFactory.h"
 #include "GrTexture.h"
 
 class GrGLCustomCoordsTextureEffect : public GrGLGeometryProcessor {
 public:
     GrGLCustomCoordsTextureEffect(const GrBackendProcessorFactory& factory, const GrProcessor&)
         : INHERITED (factory) {}
 
     virtual void emitCode(const EmitArgs& args) SK_OVERRIDE {
         const GrCustomCoordsTextureEffect& customCoordsTextureEffect =
                 args.fGP.cast<GrCustomCoordsTextureEffect>();
         SkASSERT(1 == customCoordsTextureEffect.getVertexAttribs().count());
 
-        SkString fsCoordName;
-        const char* vsVaryingName;
-        const char* fsVaryingNamePtr;
-        args.fPB->addVarying(kVec2f_GrSLType, "textureCoords", &vsVaryingName, &fsVaryingNamePtr);
-        fsCoordName = fsVaryingNamePtr;
+        GrGLVertToFrag v("TextureCoords", kVec2f_GrSLType);
+        args.fPB->addVarying(&v);
 
         GrGLVertexBuilder* vsBuilder = args.fPB->getVertexShaderBuilder();
         const GrShaderVar& inTextureCoords = customCoordsTextureEffect.inTextureCoords();
-        vsBuilder->codeAppendf("\t%s = %s;\n", vsVaryingName, inTextureCoords.c_str());
+        vsBuilder->codeAppendf("\t%s = %s;\n", v.vsOut(), inTextureCoords.c_str());
 
         GrGLGPFragmentBuilder* fsBuilder = args.fPB->getFragmentShaderBuilder();
         fsBuilder->codeAppendf("\t%s = ", args.fOutput);
         fsBuilder->appendTextureLookupAndModulate(args.fInput,
                                                   args.fSamplers[0],
-                                                  fsCoordName.c_str(),
+                                                  v.fsIn(),
                                                   kVec2f_GrSLType);
         fsBuilder->codeAppend(";\n");
     }
 
     virtual void setData(const GrGLProgramDataManager&,
                          const GrProcessor&) SK_OVERRIDE {}
 
 private:
     typedef GrGLGeometryProcessor INHERITED;
 };
@@ skipping 42 matching lines @@
     };
     SkShader::TileMode tileModes[] = {
         kTileModes[random->nextULessThan(SK_ARRAY_COUNT(kTileModes))],
         kTileModes[random->nextULessThan(SK_ARRAY_COUNT(kTileModes))],
     };
     GrTextureParams params(tileModes, random->nextBool() ? GrTextureParams::kBilerp_FilterMode :
                                                            GrTextureParams::kNone_FilterMode);
 
     return GrCustomCoordsTextureEffect::Create(textures[texIdx], params);
 }