Implement GL support for buffer textures

include/gpu/GrTexture.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 GrTexture_DEFINED
 #define GrTexture_DEFINED
 
 #include "GrSurface.h"
 #include "SkPoint.h"
 #include "SkRefCnt.h"
 
 class GrTextureParams;
 class GrTexturePriv;
 
 class GrTexture : virtual public GrSurface {
 public:
     GrTexture* asTexture() override { return this; }
     const GrTexture* asTexture() const override { return this; }
     GrSLType samplerType() const { return fSamplerType; }
 
     /**
+     * Returns true if the classic texturing options found in GrTextureParams are applicable for
+     * this texture. These may not apply for nonstandard types of textures (e.g. buffer texture).
+     */
+    bool supportsTextureParams() const { return kSamplerBuffer_GrSLType != fSamplerType; }
+
+    /**
      *  Return the native ID or handle to the texture, depending on the
      *  platform. e.g. on OpenGL, return the texture ID.
      */
     virtual GrBackendObject getTextureHandle() const = 0;
 
     /**
      * This function indicates that the texture parameters (wrap mode, filtering, ...) have been
      * changed externally to Skia.
      */
     virtual void textureParamsModified() = 0;
@@ skipping 27 matching lines @@
     GrSLType        fSamplerType;
     MipMapsStatus   fMipMapsStatus;
     int             fMaxMipMapLevel;
 
     friend class GrTexturePriv;
 
     typedef GrSurface INHERITED;
 };
 
 #endif