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//
// 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);
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_
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