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      1 //
      2 // Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved.
      3 // Use of this source code is governed by a BSD-style license that can be
      4 // found in the LICENSE file.
      5 //
      6 
      7 // TextureStorage.h: Defines the abstract rx::TextureStorage class.
      8 
      9 #ifndef LIBGLESV2_RENDERER_TEXTURESTORAGE_H_
     10 #define LIBGLESV2_RENDERER_TEXTURESTORAGE_H_
     11 
     12 #include "common/debug.h"
     13 
     14 #include <GLES2/gl2.h>
     15 
     16 namespace gl
     17 {
     18 struct ImageIndex;
     19 }
     20 
     21 namespace rx
     22 {
     23 class Renderer;
     24 class SwapChain;
     25 class RenderTarget;
     26 
     27 class TextureStorage
     28 {
     29   public:
     30     TextureStorage();
     31     virtual ~TextureStorage() {};
     32 
     33     virtual int getTopLevel() const = 0;
     34     virtual bool isRenderTarget() const = 0;
     35     virtual bool isManaged() const = 0;
     36     virtual int getLevelCount() const = 0;
     37 
     38     virtual RenderTarget *getRenderTarget(const gl::ImageIndex &index) = 0;
     39     virtual void generateMipmaps() = 0;
     40 
     41     unsigned int getRenderTargetSerial(const gl::ImageIndex &index) const;
     42     unsigned int getTextureSerial() const;
     43 
     44   protected:
     45     void initializeSerials(unsigned int rtSerialsToReserve, unsigned int rtSerialsLayerStride);
     46 
     47   private:
     48     DISALLOW_COPY_AND_ASSIGN(TextureStorage);
     49 
     50     const unsigned int mTextureSerial;
     51     static unsigned int issueTextureSerial();
     52 
     53     static unsigned int mCurrentTextureSerial;
     54 
     55     unsigned int mFirstRenderTargetSerial;
     56     unsigned int mRenderTargetSerialsLayerStride;
     57 };
     58 
     59 }
     60 
     61 #endif // LIBGLESV2_RENDERER_TEXTURESTORAGE_H_
     62