Implement NVPR on GLES

src/gpu/gl/GrGLPathRendering.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 "gl/GrGLPathRendering.h"
 #include "gl/GrGLInterface.h"
 #include "gl/GrGLNameAllocator.h"
@@ skipping 19 matching lines @@
     virtual GrGLvoid stencilThenCoverStrokePathInstanced(
                          GrGLsizei numPaths, GrGLenum pathNameType, const GrGLvoid *paths,
                          GrGLuint pathBase, GrGLint reference, GrGLuint mask, GrGLenum coverMode,
                          GrGLenum transformType, const GrGLfloat *transformValues) SK_OVERRIDE;
 };
 
 class GrGLPathRenderingV13 : public GrGLPathRenderingV12 {
 public:
     GrGLPathRenderingV13(const GrGLInterface* glInterface)
         : GrGLPathRenderingV12(glInterface) {
-        fCaps.fragmentInputGenSupport = true;
+        // Using ProgramPathFragmentInputGen on OpenGL triggers a bug that manifests itself
+        // sometimes when running shadertext test. Valgrind catches the problem reproducibly.
+        // TODO: remove this once this is fixed in the driver.
+        fCaps.fragmentInputGenSupport = kGLES_GrGLStandard == glInterface->fStandard;
     }
 
     virtual GrGLvoid programPathFragmentInputGen(GrGLuint program, GrGLint location,
                                                  GrGLenum genMode, GrGLint components,
                                                  const GrGLfloat *coeffs) SK_OVERRIDE;
 };
 
 
 GrGLPathRendering* GrGLPathRendering::Create(const GrGLInterface* glInterface) {
     if (NULL == glInterface->fFunctions.fStencilThenCoverFillPath ||
@@ skipping 221 matching lines @@
                                                 mask, coverMode, transformType, transformValues));
 }
 
 
 // NV_path_rendering v1.3
 GrGLvoid GrGLPathRenderingV13::programPathFragmentInputGen(
              GrGLuint program, GrGLint location, GrGLenum genMode,
              GrGLint components, const GrGLfloat *coeffs) {
     GL_CALL(ProgramPathFragmentInputGen(program, location, genMode, components, coeffs));
 }