kc3-lang/angle/src/libGLESv2/Renderbuffer.h

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• Author : Cooper Partin
  Date : 2014-08-11 10:16:44
  Hash : 75c42f45
  Message : Fixed memory leak in Renderbuffer class. Offscreen objects backbuffer texture /shader resource view, depth stencil texture/shader resource views were leaking during swapchain resize operations. Change-Id: Iee83a14d043eecc465e6ffb8e21a6449def38e9b Reviewed-on: https://chromium-review.googlesource.com/211834 Reviewed-by: Shannon Woods <shannonwoods@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Tested-by: Geoff Lang <geofflang@chromium.org>

• src/libGLESv2/Renderbuffer.h

• //
  // Copyright (c) 2002-2010 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  // Renderbuffer.h: Defines the wrapper class gl::Renderbuffer, as well as the
  // class hierarchy used to store its contents: RenderbufferStorage, Colorbuffer,
  // DepthStencilbuffer, Depthbuffer and Stencilbuffer. Implements GL renderbuffer
  // objects and related functionality. [OpenGL ES 2.0.24] section 4.4.3 page 108.
  
  #ifndef LIBGLESV2_RENDERBUFFER_H_
  #define LIBGLESV2_RENDERBUFFER_H_
  
  #include "angle_gl.h"
  
  #include "common/angleutils.h"
  #include "common/RefCountObject.h"
  
  namespace rx
  {
  class Renderer;
  class SwapChain;
  class RenderTarget;
  class TextureStorage;
  }
  
  namespace gl
  {
  class RenderbufferStorage;
  class FramebufferAttachment;
  
  // A GL renderbuffer object is usually used as a depth or stencil buffer attachment
  // for a framebuffer object. The renderbuffer itself is a distinct GL object, see
  // FramebufferAttachment and Framebuffer for how they are applied to an FBO via an
  // attachment point.
  
  class Renderbuffer : public RefCountObject
  {
    public:
      Renderbuffer(GLuint id, RenderbufferStorage *newStorage);
      virtual ~Renderbuffer();
  
      void setStorage(RenderbufferStorage *newStorage);
      RenderbufferStorage *getStorage();
  
      GLsizei getWidth() const;
      GLsizei getHeight() const;
      GLenum getInternalFormat() const;
      GLenum getActualFormat() const;
      GLsizei getSamples() const;
      GLuint getRedSize() const;
      GLuint getGreenSize() const;
      GLuint getBlueSize() const;
      GLuint getAlphaSize() const;
      GLuint getDepthSize() const;
      GLuint getStencilSize() const;
  
    private:
      RenderbufferStorage *mStorage;
  };
  
  // A class derived from RenderbufferStorage is created whenever glRenderbufferStorage
  // is called. The specific concrete type depends on whether the internal format is
  // colour depth, stencil or packed depth/stencil.
  class RenderbufferStorage
  {
    public:
      RenderbufferStorage();
  
      virtual ~RenderbufferStorage() = 0;
  
      virtual rx::RenderTarget *getRenderTarget();
      virtual rx::RenderTarget *getDepthStencil();
  
      virtual GLsizei getWidth() const;
      virtual GLsizei getHeight() const;
      virtual GLenum getInternalFormat() const;
      virtual GLenum getActualFormat() const;
      virtual GLsizei getSamples() const;
  
      virtual unsigned int getSerial() const;
  
      virtual bool isTexture() const;
      virtual unsigned int getTextureSerial() const;
  
      static unsigned int issueSerials(GLuint count);
  
    protected:
      GLsizei mWidth;
      GLsizei mHeight;
      GLenum mInternalFormat;
      GLenum mActualFormat;
      GLsizei mSamples;
  
    private:
      DISALLOW_COPY_AND_ASSIGN(RenderbufferStorage);
  
      const unsigned int mSerial;
  
      static unsigned int mCurrentSerial;
  };
  
  class Colorbuffer : public RenderbufferStorage
  {
    public:
      Colorbuffer(rx::Renderer *renderer, rx::SwapChain *swapChain);
      Colorbuffer(rx::Renderer *renderer, GLsizei width, GLsizei height, GLenum format, GLsizei samples);
  
      virtual ~Colorbuffer();
  
      virtual rx::RenderTarget *getRenderTarget();
  
    private:
      DISALLOW_COPY_AND_ASSIGN(Colorbuffer);
  
      rx::RenderTarget *mRenderTarget;
  };
  
  class DepthStencilbuffer : public RenderbufferStorage
  {
    public:
      DepthStencilbuffer(rx::Renderer *renderer, rx::SwapChain *swapChain);
      DepthStencilbuffer(rx::Renderer *renderer, GLsizei width, GLsizei height, GLsizei samples);
  
      ~DepthStencilbuffer();
  
      virtual rx::RenderTarget *getDepthStencil();
  
    protected:
      rx::RenderTarget  *mDepthStencil;
  
    private:
      DISALLOW_COPY_AND_ASSIGN(DepthStencilbuffer);
  };
  
  class Depthbuffer : public DepthStencilbuffer
  {
    public:
      Depthbuffer(rx::Renderer *renderer, GLsizei width, GLsizei height, GLsizei samples);
  
      virtual ~Depthbuffer();
  
    private:
      DISALLOW_COPY_AND_ASSIGN(Depthbuffer);
  };
  
  class Stencilbuffer : public DepthStencilbuffer
  {
    public:
      Stencilbuffer(rx::Renderer *renderer, GLsizei width, GLsizei height, GLsizei samples);
  
      virtual ~Stencilbuffer();
  
    private:
      DISALLOW_COPY_AND_ASSIGN(Stencilbuffer);
  };
  
  }
  
  #endif   // LIBGLESV2_RENDERBUFFER_H_