Expand modulate, add, subtract, extract component glsl helpers.

src/gpu/gl/GrGLShaderVar.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLShaderVar_DEFINED
 #define GrGLShaderVar_DEFINED
 
@@ skipping 250 matching lines @@
         if (this->getTypeModifier() != kNone_TypeModifier) {
            out->append(TypeModifierString(this->getTypeModifier(),
                                           ctxInfo.glslGeneration()));
            out->append(" ");
         }
         out->append(PrecisionString(fPrecision, ctxInfo.binding()));
         GrSLType effectiveType = this->getType();
         if (this->isArray()) {
             if (this->isUnsizedArray()) {
                 out->appendf("%s %s[]",
-                             TypeString(effectiveType),
+                             GrGLSLTypeString(effectiveType),
                              this->getName().c_str());
             } else {
                 GrAssert(this->getArrayCount() > 0);
                 out->appendf("%s %s[%d]",
-                             TypeString(effectiveType),
+                             GrGLSLTypeString(effectiveType),
                              this->getName().c_str(),
                              this->getArrayCount());
             }
         } else {
             out->appendf("%s %s",
-                         TypeString(effectiveType),
+                         GrGLSLTypeString(effectiveType),
                          this->getName().c_str());
         }
     }
 
-    static const char* TypeString(GrSLType t) {
-        switch (t) {
-            case kVoid_GrSLType:
-                return "void";
-            case kFloat_GrSLType:
-                return "float";
-            case kVec2f_GrSLType:
-                return "vec2";
-            case kVec3f_GrSLType:
-                return "vec3";
-            case kVec4f_GrSLType:
-                return "vec4";
-            case kMat33f_GrSLType:
-                return "mat3";
-            case kMat44f_GrSLType:
-                return "mat4";
-            case kSampler2D_GrSLType:
-                return "sampler2D";
-            default:
-                GrCrash("Unknown shader var type.");
-                return ""; // suppress warning
-        }
-    }
-
     void appendArrayAccess(int index, SkString* out) const {
         out->appendf("%s[%d]%s",
                      this->getName().c_str(),
                      index,
                      fUseUniformFloatArrays ? "" : ".x");
     }
 
     void appendArrayAccess(const char* indexName, SkString* out) const {
         out->appendf("%s[%s]%s",
                      this->getName().c_str(),
@@ skipping 44 matching lines @@
     SkString        fName;
     int             fCount;
     Precision       fPrecision;
     Origin          fOrigin;
     /// Work around driver bugs on some hardware that don't correctly
     /// support uniform float []
     bool            fUseUniformFloatArrays;
 };
 
 #endif