added support for PLS path rendering

src/gpu/gl/builders/GrGLProgramBuilder.h

 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLProgramBuilder_DEFINED
 #define GrGLProgramBuilder_DEFINED
 
@@ skipping 64 matching lines @@
                             int index,
                             const GrGLSLExpr4& input,
                             GrGLSLExpr4* output);
 
     void emitAndInstallProc(const GrPrimitiveProcessor&,
                             GrGLSLExpr4* outputColor,
                             GrGLSLExpr4* outputCoverage);
 
     // these emit functions help to keep the createAndEmitProcessors template general
     void emitAndInstallProc(const GrFragmentProcessor&,
                             int index,

[egdaniel, 2016/01/13 21:47:19]

just heads up, these emit functions have been moved to GrGLSLProgramBuilder

                             const char* outColor,
                             const char* inColor);
     void emitAndInstallProc(const GrPrimitiveProcessor&,
                             const char* outColor,
                             const char* outCoverage);
-    void emitAndInstallXferProc(const GrXferProcessor&,
-                                const GrGLSLExpr4& colorIn,
-                                const GrGLSLExpr4& coverageIn,
-                                bool ignoresCoverage);
+    virtual void emitAndInstallXferProc(const GrXferProcessor&,

[egdaniel, 2016/01/13 21:47:19]

why was this made virtual?

[ethannicholas, 2016/01/20 17:51:05]

Had needed it at one point, failed to remove the virtual when that changed.
Fixed!

+                                        const GrGLSLExpr4& colorIn,
+                                        const GrGLSLExpr4& coverageIn,
+                                        bool ignoresCoverage,
+                                        GrPixelLocalStorageState plsState);
     void emitFSOutputSwizzle(bool hasSecondaryOutput);
 
     void verify(const GrPrimitiveProcessor&);
     void verify(const GrXferProcessor&);
     void verify(const GrFragmentProcessor&);
     template <class Proc>
     void emitSamplers(const GrProcessor&,
                       GrGLSLTextureSampler::TextureSamplerArray* outSamplers,
                       GrGLInstalledProc<Proc>*);
 
@@ skipping 46 matching lines @@
     GrGLSLPrimitiveProcessor::TransformsOut fOutCoords;
     typedef GrGLSLUniformHandler::UniformHandle UniformHandle;
     SkTArray<UniformHandle> fSamplerUniforms;
 
     GrGLVaryingHandler        fVaryingHandler;
     GrGLUniformHandler        fUniformHandler;
 
     typedef GrGLSLProgramBuilder INHERITED; 
 };
 #endif