Added varying struct

src/gpu/gl/builders/GrGLGeometryShaderBuilder.cpp

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "GrGLGeometryShaderBuilder.h"
 #include "GrGLShaderStringBuilder.h"
 #include "GrGLProgramBuilder.h"
 #include "../GrGpuGL.h"
 
 GrGLGeometryBuilder::GrGLGeometryBuilder(GrGLProgramBuilder* program)
     : INHERITED(program) {
 
 }
 
-void GrGLGeometryBuilder::addVarying(GrSLType type,
-               const char* name,
-               const char** gsOutName) {
+void GrGLGeometryBuilder::addVarying(GrGLVarying* v) {
     // if we have a GS take each varying in as an array
     // and output as non-array.
-    fInputs.push_back();
-    fInputs.back().setType(type);
-    fInputs.back().setTypeModifier(GrGLShaderVar::kVaryingIn_TypeModifier);
-    fInputs.back().setUnsizedArray();
-    *fInputs.back().accessName() = name;
-    fOutputs.push_back();
-    fOutputs.back().setType(type);
-    fOutputs.back().setTypeModifier(GrGLShaderVar::kVaryingOut_TypeModifier);
-    fProgramBuilder->nameVariable(fOutputs.back().accessName(), 'g', name);
-    if (gsOutName) {
-        *gsOutName = fOutputs.back().getName().c_str();
+    if (v->vsVarying()) {
+        fInputs.push_back();
+        fInputs.back().setType(v->fType);
+        fInputs.back().setTypeModifier(GrGLShaderVar::kVaryingIn_TypeModifier);
+        fInputs.back().setUnsizedArray();
+        *fInputs.back().accessName() = v->fVsOut;
+        v->fGsIn = v->fVsOut;
+    }
+
+    if (v->fsVarying()) {
+        fOutputs.push_back();
+        fOutputs.back().setType(v->fType);
+        fOutputs.back().setTypeModifier(GrGLShaderVar::kVaryingOut_TypeModifier);
+        fProgramBuilder->nameVariable(fOutputs.back().accessName(), 'g', v->fName);
+        v->fGsOut = fOutputs.back().getName().c_str();
     }
 }
 
-
 bool GrGLGeometryBuilder::compileAndAttachShaders(GrGLuint programId,
         SkTDArray<GrGLuint>* shaderIds) const {
     const GrGLContext& glCtx = fProgramBuilder->gpu()->glContext();
     SkASSERT(fProgramBuilder->ctxInfo().glslGeneration() >= k150_GrGLSLGeneration);
     SkString geomShaderSrc(GrGetGLSLVersionDecl(fProgramBuilder->ctxInfo()));
     geomShaderSrc.append("layout(triangles) in;\n"
                          "layout(triangle_strip, max_vertices = 6) out;\n");
     this->appendDecls(fInputs, &geomShaderSrc);
     this->appendDecls(fOutputs, &geomShaderSrc);
     geomShaderSrc.append("void main() {\n");
@@ skipping 15 matching lines @@
     GrGLuint geomShaderId =
         GrGLCompileAndAttachShader(glCtx, programId,
                                    GR_GL_GEOMETRY_SHADER, geomShaderSrc,
                                    fProgramBuilder->gpu()->gpuStats());
     if (!geomShaderId) {
         return false;
     }
     *shaderIds->append() = geomShaderId;
     return true;
 }