Add GLSL support for texelFetch

include/gpu/GrCaps.h

 
 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 #ifndef GrCaps_DEFINED
 #define GrCaps_DEFINED
 
@@ skipping 45 matching lines @@
     GrShaderCaps();
 
     virtual SkString dump() const;
 
     bool shaderDerivativeSupport() const { return fShaderDerivativeSupport; }
     bool geometryShaderSupport() const { return fGeometryShaderSupport; }
     bool pathRenderingSupport() const { return fPathRenderingSupport; }
     bool dstReadInShaderSupport() const { return fDstReadInShaderSupport; }
     bool dualSourceBlendingSupport() const { return fDualSourceBlendingSupport; }
     bool integerSupport() const { return fIntegerSupport; }
+    bool texelBufferSupport() const { return fTexelBufferSupport; }
 
     /**
     * Get the precision info for a variable of type kFloat_GrSLType, kVec2f_GrSLType, etc in a
     * given shader type. If the shader type is not supported or the precision level is not
     * supported in that shader type then the returned struct will report false when supported() is
     * called.
     */
     const PrecisionInfo& getFloatShaderPrecisionInfo(GrShaderType shaderType,
                                                      GrSLPrecision precision) const {
         return fFloatPrecisions[shaderType][precision];
@@ skipping 28 matching lines @@
     /** Subclasses must call this after initialization in order to apply caps overrides requested by
         the client. Note that overrides will only reduce the caps never expand them. */
     void applyOptionsOverrides(const GrContextOptions& options);
 
     bool fShaderDerivativeSupport : 1;
     bool fGeometryShaderSupport : 1;
     bool fPathRenderingSupport : 1;
     bool fDstReadInShaderSupport : 1;
     bool fDualSourceBlendingSupport : 1;
     bool fIntegerSupport : 1;
+    bool fTexelBufferSupport : 1;
 
     bool fShaderPrecisionVaries;
     PrecisionInfo fFloatPrecisions[kGrShaderTypeCount][kGrSLPrecisionCount];
     int fPixelLocalStorageSize;
     bool fPLSPathRenderingSupport;
 
 private:
     virtual void onApplyOptionsOverrides(const GrContextOptions&) {};
     typedef SkRefCnt INHERITED;
 };
@@ skipping 202 matching lines @@
     virtual void onApplyOptionsOverrides(const GrContextOptions&) {};
 
     bool fSuppressPrints : 1;
     bool fImmediateFlush: 1;
     bool fDrawPathMasksToCompressedTextureSupport : 1;
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif