src/OpenGL/libGLESv2/Renderbuffer.h - SwiftShader - Git at Google

 // Copyright 2016 The SwiftShader Authors. All Rights Reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //    http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 // Renderbuffer.h: Defines the wrapper class 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 "common/Object.hpp"
 #include "common/Image.hpp"

 #include <GLES2/gl2.h>

 namespace es2
 {

 class Texture2D;
 class Texture3D;
 class TextureCubeMap;
 class Texture2DRect;
 class Renderbuffer;
 class Colorbuffer;
 class DepthStencilbuffer;

 class RenderbufferInterface
 {
 public:
 	RenderbufferInterface();

 	virtual ~RenderbufferInterface() {}

 	virtual void addProxyRef(const Renderbuffer *proxy);
     virtual void releaseProxy(const Renderbuffer *proxy);

 	virtual egl::Image *getRenderTarget() = 0;
     virtual egl::Image *createSharedImage() = 0;
     virtual bool isShared() const = 0;

 	virtual GLsizei getWidth() const = 0;
 	virtual GLsizei getHeight() const = 0;
 	virtual GLsizei getDepth() const { return 1; }
 	virtual GLint getLevel() const { return 0; }
 	virtual GLint getFormat() const = 0;
 	virtual GLsizei getSamples() const = 0;

 	virtual void setLevel(GLint) {}

 	GLuint getRedSize() const;
 	GLuint getGreenSize() const;
 	GLuint getBlueSize() const;
 	GLuint getAlphaSize() const;
 	GLuint getDepthSize() const;
 	GLuint getStencilSize() const;
 };

 class RenderbufferTexture2D : public RenderbufferInterface
 {
 public:
 	RenderbufferTexture2D(Texture2D *texture, GLint level);

 	~RenderbufferTexture2D() override;

 	void addProxyRef(const Renderbuffer *proxy) override;
     void releaseProxy(const Renderbuffer *proxy) override;

 	egl::Image *getRenderTarget() override;
     egl::Image *createSharedImage() override;
     bool isShared() const override;

 	GLsizei getWidth() const override;
 	GLsizei getHeight() const override;
 	GLint getLevel() const override { return mLevel; }
 	GLint getFormat() const override;
 	GLsizei getSamples() const override;

 	void setLevel(GLint level) override { mLevel = level; }

 private:
 	gl::BindingPointer<Texture2D> mTexture2D;
 	GLint mLevel;
 };

 class RenderbufferTexture2DRect : public RenderbufferInterface
 {
 public:
 	RenderbufferTexture2DRect(Texture2DRect *texture);

 	~RenderbufferTexture2DRect() override;

 	void addProxyRef(const Renderbuffer *proxy) override;
 	void releaseProxy(const Renderbuffer *proxy) override;

 	egl::Image *getRenderTarget() override;
 	egl::Image *createSharedImage() override;
 	bool isShared() const override;

 	GLsizei getWidth() const override;
 	GLsizei getHeight() const override;
 	GLint getFormat() const override;
 	GLsizei getSamples() const override;

 private:
 	gl::BindingPointer<Texture2DRect> mTexture2DRect;
 };

 class RenderbufferTexture3D : public RenderbufferInterface
 {
 public:
 	RenderbufferTexture3D(Texture3D *texture, GLint level);

 	~RenderbufferTexture3D() override;

 	void addProxyRef(const Renderbuffer *proxy) override;
 	void releaseProxy(const Renderbuffer *proxy) override;

 	egl::Image *getRenderTarget() override;
 	egl::Image *createSharedImage() override;
 	bool isShared() const override;

 	GLsizei getWidth() const override;
 	GLsizei getHeight() const override;
 	GLsizei getDepth() const override;
 	GLint getLevel() const override { return mLevel; }
 	GLint getFormat() const override;
 	GLsizei getSamples() const override;

 	void setLevel(GLint level) override { mLevel = level; }

 private:
 	gl::BindingPointer<Texture3D> mTexture3D;
 	GLint mLevel;
 };

 class RenderbufferTextureCubeMap : public RenderbufferInterface
 {
 public:
 	RenderbufferTextureCubeMap(TextureCubeMap *texture, GLenum target, GLint level);

 	~RenderbufferTextureCubeMap() override;

 	void addProxyRef(const Renderbuffer *proxy) override;
     void releaseProxy(const Renderbuffer *proxy) override;

 	egl::Image *getRenderTarget() override;
     egl::Image *createSharedImage() override;
     bool isShared() const override;

 	GLsizei getWidth() const override;
 	GLsizei getHeight() const override;
 	GLint getLevel() const override { return mLevel; }
 	GLint getFormat() const override;
 	GLsizei getSamples() const override;

 	void setLevel(GLint level) override { mLevel = level; }

 private:
 	gl::BindingPointer<TextureCubeMap> mTextureCubeMap;
 	GLenum mTarget;
 	GLint mLevel;
 };

 // 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 RenderbufferInterface
 {
 public:
 	RenderbufferStorage();

 	~RenderbufferStorage() override = 0;

 	egl::Image *getRenderTarget() override = 0;
     egl::Image *createSharedImage() override = 0;
     bool isShared() const override = 0;

 	GLsizei getWidth() const override;
 	GLsizei getHeight() const override;
 	GLint getFormat() const override;
 	GLsizei getSamples() const override;

 protected:
 	GLsizei mWidth;
 	GLsizei mHeight;
 	GLenum format;
 	GLsizei mSamples;
 };

 // Renderbuffer implements the GL renderbuffer object.
 // It's only a proxy for a RenderbufferInterface instance; the internal object
 // can change whenever glRenderbufferStorage is called.
 class Renderbuffer : public gl::NamedObject
 {
 public:
 	Renderbuffer(GLuint name, RenderbufferInterface *storage);

 	~Renderbuffer() override;

 	// These functions from Object are overloaded here because
     // Textures need to maintain their own count of references to them via
     // Renderbuffers/RenderbufferTextures. These functions invoke those
     // reference counting functions on the RenderbufferInterface.
     void addRef() override;
     void release() override;

 	egl::Image *getRenderTarget();
     virtual egl::Image *createSharedImage();
     virtual bool isShared() const;

 	GLsizei getWidth() const;
 	GLsizei getHeight() const;
 	GLsizei getDepth() const;
 	GLint getLevel() const;
 	GLint getFormat() const;
 	GLuint getRedSize() const;
 	GLuint getGreenSize() const;
 	GLuint getBlueSize() const;
 	GLuint getAlphaSize() const;
 	GLuint getDepthSize() const;
 	GLuint getStencilSize() const;
 	GLsizei getSamples() const;

 	void setLevel(GLint level);
 	void setStorage(RenderbufferStorage *newStorage);

 private:
 	RenderbufferInterface *mInstance;
 };

 class Colorbuffer : public RenderbufferStorage
 {
 public:
 	explicit Colorbuffer(egl::Image *renderTarget);
 	Colorbuffer(GLsizei width, GLsizei height, GLenum internalformat, GLsizei samples);

 	~Colorbuffer() override;

 	egl::Image *getRenderTarget() override;
     egl::Image *createSharedImage() override;
     bool isShared() const override;

 private:
 	egl::Image *mRenderTarget;
 };

 class DepthStencilbuffer : public RenderbufferStorage
 {
 public:
 	explicit DepthStencilbuffer(egl::Image *depthStencil);
 	DepthStencilbuffer(GLsizei width, GLsizei height, GLenum internalformat, GLsizei samples);

 	~DepthStencilbuffer();

 	egl::Image *getRenderTarget() override;
     egl::Image *createSharedImage() override;
     bool isShared() const override;

 protected:
 	egl::Image *mDepthStencil;
 };

 class Depthbuffer : public DepthStencilbuffer
 {
 public:
 	explicit Depthbuffer(egl::Image *depthStencil);
 	Depthbuffer(GLsizei width, GLsizei height, GLenum internalformat, GLsizei samples);

 	~Depthbuffer() override;
 };

 class Stencilbuffer : public DepthStencilbuffer
 {
 public:
 	explicit Stencilbuffer(egl::Image *depthStencil);
 	Stencilbuffer(GLsizei width, GLsizei height, GLsizei samples);

 	~Stencilbuffer() override;
 };
 }

 #endif   // LIBGLESV2_RENDERBUFFER_H_
	// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	// Renderbuffer.h: Defines the wrapper class 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 "common/Object.hpp"
	#include "common/Image.hpp"

	#include <GLES2/gl2.h>

	namespace es2
	{

	class Texture2D;
	class Texture3D;
	class TextureCubeMap;
	class Texture2DRect;
	class Renderbuffer;
	class Colorbuffer;
	class DepthStencilbuffer;

	class RenderbufferInterface
	{
	public:
	RenderbufferInterface();

	virtual ~RenderbufferInterface() {}

	virtual void addProxyRef(const Renderbuffer *proxy);
	virtual void releaseProxy(const Renderbuffer *proxy);

	virtual egl::Image *getRenderTarget() = 0;
	virtual egl::Image *createSharedImage() = 0;
	virtual bool isShared() const = 0;

	virtual GLsizei getWidth() const = 0;
	virtual GLsizei getHeight() const = 0;
	virtual GLsizei getDepth() const { return 1; }
	virtual GLint getLevel() const { return 0; }
	virtual GLint getFormat() const = 0;
	virtual GLsizei getSamples() const = 0;

	virtual void setLevel(GLint) {}

	GLuint getRedSize() const;
	GLuint getGreenSize() const;
	GLuint getBlueSize() const;
	GLuint getAlphaSize() const;
	GLuint getDepthSize() const;
	GLuint getStencilSize() const;
	};

	class RenderbufferTexture2D : public RenderbufferInterface
	{
	public:
	RenderbufferTexture2D(Texture2D *texture, GLint level);

	~RenderbufferTexture2D() override;

	void addProxyRef(const Renderbuffer *proxy) override;
	void releaseProxy(const Renderbuffer *proxy) override;

	egl::Image *getRenderTarget() override;
	egl::Image *createSharedImage() override;
	bool isShared() const override;

	GLsizei getWidth() const override;
	GLsizei getHeight() const override;
	GLint getLevel() const override { return mLevel; }
	GLint getFormat() const override;
	GLsizei getSamples() const override;

	void setLevel(GLint level) override { mLevel = level; }

	private:
	gl::BindingPointer<Texture2D> mTexture2D;
	GLint mLevel;
	};

	class RenderbufferTexture2DRect : public RenderbufferInterface
	{
	public:
	RenderbufferTexture2DRect(Texture2DRect *texture);

	~RenderbufferTexture2DRect() override;

	void addProxyRef(const Renderbuffer *proxy) override;
	void releaseProxy(const Renderbuffer *proxy) override;

	egl::Image *getRenderTarget() override;
	egl::Image *createSharedImage() override;
	bool isShared() const override;

	GLsizei getWidth() const override;
	GLsizei getHeight() const override;
	GLint getFormat() const override;
	GLsizei getSamples() const override;

	private:
	gl::BindingPointer<Texture2DRect> mTexture2DRect;
	};

	class RenderbufferTexture3D : public RenderbufferInterface
	{
	public:
	RenderbufferTexture3D(Texture3D *texture, GLint level);

	~RenderbufferTexture3D() override;

	void addProxyRef(const Renderbuffer *proxy) override;
	void releaseProxy(const Renderbuffer *proxy) override;

	egl::Image *getRenderTarget() override;
	egl::Image *createSharedImage() override;
	bool isShared() const override;

	GLsizei getWidth() const override;
	GLsizei getHeight() const override;
	GLsizei getDepth() const override;
	GLint getLevel() const override { return mLevel; }
	GLint getFormat() const override;
	GLsizei getSamples() const override;

	void setLevel(GLint level) override { mLevel = level; }

	private:
	gl::BindingPointer<Texture3D> mTexture3D;
	GLint mLevel;
	};

	class RenderbufferTextureCubeMap : public RenderbufferInterface
	{
	public:
	RenderbufferTextureCubeMap(TextureCubeMap *texture, GLenum target, GLint level);

	~RenderbufferTextureCubeMap() override;

	void addProxyRef(const Renderbuffer *proxy) override;
	void releaseProxy(const Renderbuffer *proxy) override;

	egl::Image *getRenderTarget() override;
	egl::Image *createSharedImage() override;
	bool isShared() const override;

	GLsizei getWidth() const override;
	GLsizei getHeight() const override;
	GLint getLevel() const override { return mLevel; }
	GLint getFormat() const override;
	GLsizei getSamples() const override;

	void setLevel(GLint level) override { mLevel = level; }

	private:
	gl::BindingPointer<TextureCubeMap> mTextureCubeMap;
	GLenum mTarget;
	GLint mLevel;
	};

	// 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 RenderbufferInterface
	{
	public:
	RenderbufferStorage();

	~RenderbufferStorage() override = 0;

	egl::Image *getRenderTarget() override = 0;
	egl::Image *createSharedImage() override = 0;
	bool isShared() const override = 0;

	GLsizei getWidth() const override;
	GLsizei getHeight() const override;
	GLint getFormat() const override;
	GLsizei getSamples() const override;

	protected:
	GLsizei mWidth;
	GLsizei mHeight;
	GLenum format;
	GLsizei mSamples;
	};

	// Renderbuffer implements the GL renderbuffer object.
	// It's only a proxy for a RenderbufferInterface instance; the internal object
	// can change whenever glRenderbufferStorage is called.
	class Renderbuffer : public gl::NamedObject
	{
	public:
	Renderbuffer(GLuint name, RenderbufferInterface *storage);

	~Renderbuffer() override;

	// These functions from Object are overloaded here because
	// Textures need to maintain their own count of references to them via
	// Renderbuffers/RenderbufferTextures. These functions invoke those
	// reference counting functions on the RenderbufferInterface.
	void addRef() override;
	void release() override;

	egl::Image *getRenderTarget();
	virtual egl::Image *createSharedImage();
	virtual bool isShared() const;

	GLsizei getWidth() const;
	GLsizei getHeight() const;
	GLsizei getDepth() const;
	GLint getLevel() const;
	GLint getFormat() const;
	GLuint getRedSize() const;
	GLuint getGreenSize() const;
	GLuint getBlueSize() const;
	GLuint getAlphaSize() const;
	GLuint getDepthSize() const;
	GLuint getStencilSize() const;
	GLsizei getSamples() const;

	void setLevel(GLint level);
	void setStorage(RenderbufferStorage *newStorage);

	private:
	RenderbufferInterface *mInstance;
	};

	class Colorbuffer : public RenderbufferStorage
	{
	public:
	explicit Colorbuffer(egl::Image *renderTarget);
	Colorbuffer(GLsizei width, GLsizei height, GLenum internalformat, GLsizei samples);

	~Colorbuffer() override;

	egl::Image *getRenderTarget() override;
	egl::Image *createSharedImage() override;
	bool isShared() const override;

	private:
	egl::Image *mRenderTarget;
	};

	class DepthStencilbuffer : public RenderbufferStorage
	{
	public:
	explicit DepthStencilbuffer(egl::Image *depthStencil);
	DepthStencilbuffer(GLsizei width, GLsizei height, GLenum internalformat, GLsizei samples);

	~DepthStencilbuffer();

	egl::Image *getRenderTarget() override;
	egl::Image *createSharedImage() override;
	bool isShared() const override;

	protected:
	egl::Image *mDepthStencil;
	};

	class Depthbuffer : public DepthStencilbuffer
	{
	public:
	explicit Depthbuffer(egl::Image *depthStencil);
	Depthbuffer(GLsizei width, GLsizei height, GLenum internalformat, GLsizei samples);

	~Depthbuffer() override;
	};

	class Stencilbuffer : public DepthStencilbuffer
	{
	public:
	explicit Stencilbuffer(egl::Image *depthStencil);
	Stencilbuffer(GLsizei width, GLsizei height, GLsizei samples);

	~Stencilbuffer() override;
	};
	}

	#endif // LIBGLESV2_RENDERBUFFER_H_