Abandon offset support with texel buffers

src/gpu/gl/GrGLGpu.h

 /*
  * Copyright 2011 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef GrGLGpu_DEFINED
 #define GrGLGpu_DEFINED
 
@@ skipping 42 matching lines @@
         SkASSERT(glCaps().shaderCaps()->pathRenderingSupport());
         return static_cast<GrGLPathRendering*>(pathRendering());
     }
 
     void discard(GrRenderTarget*) override;
 
     // Used by GrGLProgram to configure OpenGL state.
     void bindTexture(int unitIdx, const GrTextureParams& params, bool allowSRGBInputs,
                      GrGLTexture* texture);
 
-    void bindTexelBuffer(int unitIdx, intptr_t offsetInBytes, GrPixelConfig, GrGLBuffer*);
+    void bindTexelBuffer(int unitIdx, GrPixelConfig, GrGLBuffer*);
 
     bool onGetReadPixelsInfo(GrSurface* srcSurface, int readWidth, int readHeight, size_t rowBytes,
                              GrPixelConfig readConfig, DrawPreference*,
                              ReadPixelTempDrawInfo*) override;
 
     bool onGetWritePixelsInfo(GrSurface* dstSurface, int width, int height,
                               GrPixelConfig srcConfig, DrawPreference*,
                               WritePixelTempDrawInfo*) override;
 
     bool initCopySurfaceDstDesc(const GrSurface* src, GrSurfaceDesc* desc) const override;
@@ skipping 427 matching lines @@
     TriState                    fHWSRGBFramebuffer;
     SkTArray<uint32_t, true>    fHWBoundTextureUniqueIDs;
 
     struct BufferTexture {
         BufferTexture() : fTextureID(0), fKnownBound(false),
                           fAttachedBufferUniqueID(SK_InvalidUniqueID),
                           fSwizzle(GrSwizzle::RGBA()) {}
 
         GrGLuint        fTextureID;
         bool            fKnownBound;
-        intptr_t        fOffsetInBytes;
         GrPixelConfig   fTexelConfig;
-        size_t          fAttachedSizeInBytes;
         uint32_t        fAttachedBufferUniqueID;
         GrSwizzle       fSwizzle;
     };
 
     SkTArray<BufferTexture, true>   fHWBufferTextures;
     int                             fHWMaxUsedBufferTextureUnit;
 
     // EXT_raster_multisample.
     TriState                    fHWRasterMultisampleEnabled;
     int                         fHWNumRasterSamples;
@@ skipping 38 matching lines @@
     bool fHWPLSEnabled;
     bool fPLSHasBeenUsed;
 
     float fHWMinSampleShading;
 
     typedef GrGpu INHERITED;
     friend class GrGLPathRendering; // For accessing setTextureUnit.
 };
 
 #endif