Implement support for CHROMIUM_NV_path_rendering pseudo extension

src/gpu/gl/GrGLShaderBuilder.h

 /*
  * Copyright 2012 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLShaderBuilder_DEFINED
 #define GrGLShaderBuilder_DEFINED
 
@@ skipping 32 matching lines @@
 
     GrGLShaderBuilder(GrGpuGL*, GrGLUniformManager&, const GrGLProgramDesc&);
     virtual ~GrGLShaderBuilder() {}
 
     /**
      * Use of these features may require a GLSL extension to be enabled. Shaders may not compile
      * if code is added that uses one of these features without calling enableFeature()
      */
     enum GLSLFeature {
         kStandardDerivatives_GLSLFeature = 0,
+        kTexCoordSupport_GLSLFeature,
 
-        kLastGLSLFeature = kStandardDerivatives_GLSLFeature
+        kLastGLSLFeature = kTexCoordSupport_GLSLFeature
     };
 
     /**
      * If the feature is supported then true is returned and any necessary #extension declarations
      * are added to the shaders. If the feature is not supported then false will be returned.
      */
     bool enableFeature(GLSLFeature);
 
     /**
      * Called by GrGLEffects to add code the fragment shader.
@@ skipping 393 matching lines @@
     GrGLFragmentOnlyShaderBuilder(GrGpuGL*, GrGLUniformManager&, const GrGLProgramDesc&);
 
     int getNumTexCoordSets() const { return fNumTexCoordSets; }
     int addTexCoordSets(int count);
 
     virtual GrGLProgramEffects* createAndEmitEffects(
                 const GrEffectStage* effectStages[],
                 const EffectKey effectKeys[],
                 int effectCnt,
                 GrGLSLExpr4* inOutFSColor) SK_OVERRIDE;
+protected:
+    virtual bool compileAndAttachShaders(GrGLuint programId, SkTDArray<GrGLuint>* shaderIds) const SK_OVERRIDE;
 
 private:
     int fNumTexCoordSets;
 
     typedef GrGLShaderBuilder INHERITED;
 };
 
 #endif