Implement texel buffers

src/gpu/gl/GrGLCaps.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 GrGLCaps_DEFINED
 #define GrGLCaps_DEFINED
@@ skipping 117 matching lines @@
             return SkToBool(fConfigTable[config].fFlags & ConfigInfo::kRenderableWithMSAA_Flag);
         } else {
             return SkToBool(fConfigTable[config].fFlags & ConfigInfo::kRenderable_Flag);
         }
     }
 
     bool isConfigTexSupportEnabled(GrPixelConfig config) const {
         return SkToBool(fConfigTable[config].fFlags & ConfigInfo::kCanUseTexStorage_Flag);
     }
 
+    bool canUseConfigWithTexelBuffer(GrPixelConfig config) const {
+        return SkToBool(fConfigTable[config].fFlags & ConfigInfo::kCanUseWithTexelBuffer_Flag);
+    }
+
     /** Returns the mapping between GrPixelConfig components and GL internal format components. */
     const GrSwizzle& configSwizzle(GrPixelConfig config) const {
         return fConfigTable[config].fSwizzle;
     }
 
+    GrGLenum configSizedInternalFormat(GrPixelConfig config) const {
+        return fConfigTable[config].fFormats.fSizedInternalFormat;
+    }
+
     bool getTexImageFormats(GrPixelConfig surfaceConfig, GrPixelConfig externalConfig,
                             GrGLenum* internalFormat, GrGLenum* externalFormat,
                             GrGLenum* externalType) const;
 
     bool getCompressedTexImageFormats(GrPixelConfig surfaceConfig, GrGLenum* internalFormat) const;
 
     bool getReadPixelsFormat(GrPixelConfig surfaceConfig, GrPixelConfig externalConfig,
                              GrGLenum* externalFormat, GrGLenum* externalType) const;
 
     bool getRenderbufferFormat(GrPixelConfig config, GrGLenum* internalFormat) const;
@@ skipping 308 matching lines @@
 
         // Index fStencilFormats.
         int      fStencilFormatIndex;
 
         enum {
             kVerifiedColorAttachment_Flag = 0x1,
             kTextureable_Flag             = 0x2,
             kRenderable_Flag              = 0x4,
             kRenderableWithMSAA_Flag      = 0x8,
             kCanUseTexStorage_Flag        = 0x10,
+            kCanUseWithTexelBuffer_Flag   = 0x20,
         };
         uint32_t fFlags;
 
         GrSwizzle fSwizzle;
     };
 
     ConfigInfo fConfigTable[kGrPixelConfigCnt];
 
     typedef GrCaps INHERITED;
 };
 
 #endif