src/OpenGL/libGLESv2/Texture.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.

 // Texture.h: Defines the abstract Texture class and its concrete derived
 // classes Texture2D and TextureCubeMap. Implements GL texture objects and
 // related functionality. [OpenGL ES 2.0.24] section 3.7 page 63.

 #ifndef LIBGLESV2_TEXTURE_H_
 #define LIBGLESV2_TEXTURE_H_

 #include "Renderbuffer.h"
 #include "common/Object.hpp"
 #include "utilities.h"
 #include "libEGL/Texture.hpp"
 #include "common/debug.h"

 #include <GLES2/gl2.h>

 #include <vector>

 namespace gl { class Surface; }

 namespace es2
 {
 class Framebuffer;

 enum
 {
 	IMPLEMENTATION_MAX_TEXTURE_LEVELS = sw::MIPMAP_LEVELS,
 	IMPLEMENTATION_MAX_TEXTURE_SIZE = 1 << (IMPLEMENTATION_MAX_TEXTURE_LEVELS - 1),
 	IMPLEMENTATION_MAX_CUBE_MAP_TEXTURE_SIZE = 1 << (IMPLEMENTATION_MAX_TEXTURE_LEVELS - 1),
 	IMPLEMENTATION_MAX_RENDERBUFFER_SIZE = sw::OUTLINE_RESOLUTION,
 };

 class Texture : public egl::Texture
 {
 public:
 	explicit Texture(GLuint name);

 	sw::Resource *getResource() const override;

 	virtual void addProxyRef(const Renderbuffer *proxy) = 0;
 	virtual void releaseProxy(const Renderbuffer *proxy) = 0;

 	virtual GLenum getTarget() const = 0;

 	bool setMinFilter(GLenum filter);
 	bool setMagFilter(GLenum filter);
 	bool setWrapS(GLenum wrap);
 	bool setWrapT(GLenum wrap);
 	bool setWrapR(GLenum wrap);
 	bool setMaxAnisotropy(GLfloat textureMaxAnisotropy);
 	bool setBaseLevel(GLint baseLevel);
 	bool setCompareFunc(GLenum compareFunc);
 	bool setCompareMode(GLenum compareMode);
 	void makeImmutable(GLsizei levels);
 	bool setMaxLevel(GLint maxLevel);
 	bool setMaxLOD(GLfloat maxLOD);
 	bool setMinLOD(GLfloat minLOD);
 	bool setSwizzleR(GLenum swizzleR);
 	bool setSwizzleG(GLenum swizzleG);
 	bool setSwizzleB(GLenum swizzleB);
 	bool setSwizzleA(GLenum swizzleA);

 	GLenum getMinFilter() const;
 	GLenum getMagFilter() const;
 	GLenum getWrapS() const;
 	GLenum getWrapT() const;
 	GLenum getWrapR() const;
 	GLfloat getMaxAnisotropy() const;
 	GLint getBaseLevel() const;
 	GLenum getCompareFunc() const;
 	GLenum getCompareMode() const;
 	GLboolean getImmutableFormat() const;
 	GLsizei getImmutableLevels() const;
 	GLint getMaxLevel() const;
 	GLfloat getMaxLOD() const;
 	GLfloat getMinLOD() const;
 	GLenum getSwizzleR() const;
 	GLenum getSwizzleG() const;
 	GLenum getSwizzleB() const;
 	GLenum getSwizzleA() const;

 	virtual GLsizei getWidth(GLenum target, GLint level) const = 0;
 	virtual GLsizei getHeight(GLenum target, GLint level) const = 0;
 	virtual GLsizei getDepth(GLenum target, GLint level) const;
 	virtual GLenum getFormat(GLenum target, GLint level) const = 0;
 	virtual GLenum getType(GLenum target, GLint level) const = 0;
 	virtual int getTopLevel() const = 0;

 	virtual bool isSamplerComplete() const = 0;
 	virtual bool isCompressed(GLenum target, GLint level) const = 0;
 	virtual bool isDepth(GLenum target, GLint level) const = 0;

 	virtual Renderbuffer *getRenderbuffer(GLenum target, GLint level) = 0;
 	virtual egl::Image *getRenderTarget(GLenum target, unsigned int level) = 0;
 	egl::Image *createSharedImage(GLenum target, unsigned int level);
 	virtual bool isShared(GLenum target, unsigned int level) const = 0;

 	virtual void generateMipmaps() = 0;
 	virtual void copySubImage(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source) = 0;

 protected:
 	~Texture() override;

 	void setImage(egl::Context *context, GLenum format, GLenum type, const egl::Image::UnpackInfo& unpackInfo, const void *pixels, egl::Image *image);
 	void subImage(egl::Context *context, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const egl::Image::UnpackInfo& unpackInfo, const void *pixels, egl::Image *image);
 	void setCompressedImage(GLsizei imageSize, const void *pixels, egl::Image *image);
 	void subImageCompressed(GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const void *pixels, egl::Image *image);

 	bool copy(egl::Image *source, const sw::SliceRect &sourceRect, GLint xoffset, GLint yoffset, GLint zoffset, egl::Image *dest);

 	bool isMipmapFiltered() const;

 	GLenum mMinFilter;
 	GLenum mMagFilter;
 	GLenum mWrapS;
 	GLenum mWrapT;
 	GLenum mWrapR;
 	GLfloat mMaxAnisotropy;
 	GLint mBaseLevel;
 	GLenum mCompareFunc;
 	GLenum mCompareMode;
 	GLboolean mImmutableFormat;
 	GLsizei mImmutableLevels;
 	GLint mMaxLevel;
 	GLfloat mMaxLOD;
 	GLfloat mMinLOD;
 	GLenum mSwizzleR;
 	GLenum mSwizzleG;
 	GLenum mSwizzleB;
 	GLenum mSwizzleA;

 	sw::Resource *resource;
 };

 class Texture2D : public Texture
 {
 public:
 	explicit Texture2D(GLuint name);

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

 	GLenum getTarget() const override;

 	GLsizei getWidth(GLenum target, GLint level) const override;
 	GLsizei getHeight(GLenum target, GLint level) const override;
 	GLenum getFormat(GLenum target, GLint level) const override;
 	GLenum getType(GLenum target, GLint level) const override;
 	int getTopLevel() const override;

 	void setImage(egl::Context *context, GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, const egl::Image::UnpackInfo& unpackInfo, const void *pixels);
 	void setCompressedImage(GLint level, GLenum format, GLsizei width, GLsizei height, GLsizei imageSize, const void *pixels);
 	void subImage(egl::Context *context, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const egl::Image::UnpackInfo& unpackInfo, const void *pixels);
 	void subImageCompressed(GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const void *pixels);
 	void copyImage(GLint level, GLenum format, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source);
 	void copySubImage(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source) override;

 	void setSharedImage(egl::Image *image);

 	bool isSamplerComplete() const override;
 	bool isCompressed(GLenum target, GLint level) const override;
 	bool isDepth(GLenum target, GLint level) const override;
 	void bindTexImage(gl::Surface *surface);
 	void releaseTexImage() override;

 	void generateMipmaps() override;

 	Renderbuffer *getRenderbuffer(GLenum target, GLint level) override;
 	egl::Image *getRenderTarget(GLenum target, unsigned int level) override;
 	bool isShared(GLenum target, unsigned int level) const override;

 	egl::Image *getImage(unsigned int level);

 protected:
 	~Texture2D() override;

 	bool isMipmapComplete() const;

 	egl::Image *image[IMPLEMENTATION_MAX_TEXTURE_LEVELS];

 	gl::Surface *mSurface;

 	// A specific internal reference count is kept for colorbuffer proxy references,
 	// because, as the renderbuffer acting as proxy will maintain a binding pointer
 	// back to this texture, there would be a circular reference if we used a binding
 	// pointer here. This reference count will cause the pointer to be set to null if
 	// the count drops to zero, but will not cause deletion of the Renderbuffer.
 	Renderbuffer *mColorbufferProxy;
 	unsigned int mProxyRefs;
 };

 class TextureCubeMap : public Texture
 {
 public:
 	explicit TextureCubeMap(GLuint name);

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

 	GLenum getTarget() const override;

 	GLsizei getWidth(GLenum target, GLint level) const override;
 	GLsizei getHeight(GLenum target, GLint level) const override;
 	GLenum getFormat(GLenum target, GLint level) const override;
 	GLenum getType(GLenum target, GLint level) const override;
 	int getTopLevel() const override;

 	void setImage(egl::Context *context, GLenum target, GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, const egl::Image::UnpackInfo& unpackInfo, const void *pixels);
 	void setCompressedImage(GLenum target, GLint level, GLenum format, GLsizei width, GLsizei height, GLsizei imageSize, const void *pixels);

 	void subImage(egl::Context *context, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const egl::Image::UnpackInfo& unpackInfo, const void *pixels);
 	void subImageCompressed(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const void *pixels);
 	void copyImage(GLenum target, GLint level, GLenum format, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source);
 	void copySubImage(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source) override;

 	bool isSamplerComplete() const override;
 	bool isCompressed(GLenum target, GLint level) const override;
 	bool isDepth(GLenum target, GLint level) const override;
 	void releaseTexImage() override;

 	void generateMipmaps() override;
 	void updateBorders(int level);

 	Renderbuffer *getRenderbuffer(GLenum target, GLint level) override;
 	egl::Image *getRenderTarget(GLenum target, unsigned int level) override;
 	bool isShared(GLenum target, unsigned int level) const override;

 	egl::Image *getImage(int face, unsigned int level);

 	bool isCubeComplete() const;

 protected:
 	~TextureCubeMap() override;

 private:
 	bool isMipmapCubeComplete() const;

 	// face is one of the GL_TEXTURE_CUBE_MAP_* enumerants. Returns nullptr on failure.
 	egl::Image *getImage(GLenum face, unsigned int level);

 	egl::Image *image[6][IMPLEMENTATION_MAX_TEXTURE_LEVELS];

 	// A specific internal reference count is kept for colorbuffer proxy references,
 	// because, as the renderbuffer acting as proxy will maintain a binding pointer
 	// back to this texture, there would be a circular reference if we used a binding
 	// pointer here. This reference count will cause the pointer to be set to null if
 	// the count drops to zero, but will not cause deletion of the Renderbuffer.
 	Renderbuffer *mFaceProxies[6];
 	unsigned int mFaceProxyRefs[6];
 };

 class Texture3D : public Texture
 {
 public:
 	explicit Texture3D(GLuint name);

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

 	GLenum getTarget() const override;

 	GLsizei getWidth(GLenum target, GLint level) const override;
 	GLsizei getHeight(GLenum target, GLint level) const override;
 	GLsizei getDepth(GLenum target, GLint level) const override;
 	GLenum getFormat(GLenum target, GLint level) const override;
 	GLenum getType(GLenum target, GLint level) const override;
 	int getTopLevel() const override;

 	void setImage(egl::Context *context, GLint level, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const egl::Image::UnpackInfo& unpackInfo, const void *pixels);
 	void setCompressedImage(GLint level, GLenum format, GLsizei width, GLsizei height, GLsizei depth, GLsizei imageSize, const void *pixels);
 	void subImage(egl::Context *context, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const egl::Image::UnpackInfo& unpackInfo, const void *pixels);
 	void subImageCompressed(GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const void *pixels);
 	void copyImage(GLint level, GLenum format, GLint x, GLint y, GLint z, GLsizei width, GLsizei height, GLsizei depth, Framebuffer *source);
 	void copySubImage(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source);

 	void setSharedImage(egl::Image *image);

 	bool isSamplerComplete() const override;
 	bool isCompressed(GLenum target, GLint level) const override;
 	bool isDepth(GLenum target, GLint level) const override;
 	void releaseTexImage() override;

 	void generateMipmaps() override;

 	Renderbuffer *getRenderbuffer(GLenum target, GLint level) override;
 	egl::Image *getRenderTarget(GLenum target, unsigned int level) override;
 	bool isShared(GLenum target, unsigned int level) const override;

 	egl::Image *getImage(unsigned int level);

 protected:
 	~Texture3D() override;

 	bool isMipmapComplete() const;

 	egl::Image *image[IMPLEMENTATION_MAX_TEXTURE_LEVELS];

 	gl::Surface *mSurface;

 	// A specific internal reference count is kept for colorbuffer proxy references,
 	// because, as the renderbuffer acting as proxy will maintain a binding pointer
 	// back to this texture, there would be a circular reference if we used a binding
 	// pointer here. This reference count will cause the pointer to be set to null if
 	// the count drops to zero, but will not cause deletion of the Renderbuffer.
 	Renderbuffer *mColorbufferProxy;
 	unsigned int mProxyRefs;
 };

 class Texture2DArray : public Texture3D
 {
 public:
 	explicit Texture2DArray(GLuint name);

 	GLenum getTarget() const override;
 	void generateMipmaps() override;

 protected:
 	~Texture2DArray() override;
 };

 class TextureExternal : public Texture2D
 {
 public:
 	explicit TextureExternal(GLuint name);

 	GLenum getTarget() const override;

 protected:
 	~TextureExternal() override;
 };
 }

 #endif   // LIBGLESV2_TEXTURE_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.

	// Texture.h: Defines the abstract Texture class and its concrete derived
	// classes Texture2D and TextureCubeMap. Implements GL texture objects and
	// related functionality. [OpenGL ES 2.0.24] section 3.7 page 63.

	#ifndef LIBGLESV2_TEXTURE_H_
	#define LIBGLESV2_TEXTURE_H_

	#include "Renderbuffer.h"
	#include "common/Object.hpp"
	#include "utilities.h"
	#include "libEGL/Texture.hpp"
	#include "common/debug.h"

	#include <GLES2/gl2.h>

	#include <vector>

	namespace gl { class Surface; }

	namespace es2
	{
	class Framebuffer;

	enum
	{
	IMPLEMENTATION_MAX_TEXTURE_LEVELS = sw::MIPMAP_LEVELS,
	IMPLEMENTATION_MAX_TEXTURE_SIZE = 1 << (IMPLEMENTATION_MAX_TEXTURE_LEVELS - 1),
	IMPLEMENTATION_MAX_CUBE_MAP_TEXTURE_SIZE = 1 << (IMPLEMENTATION_MAX_TEXTURE_LEVELS - 1),
	IMPLEMENTATION_MAX_RENDERBUFFER_SIZE = sw::OUTLINE_RESOLUTION,
	};

	class Texture : public egl::Texture
	{
	public:
	explicit Texture(GLuint name);

	sw::Resource *getResource() const override;

	virtual void addProxyRef(const Renderbuffer *proxy) = 0;
	virtual void releaseProxy(const Renderbuffer *proxy) = 0;

	virtual GLenum getTarget() const = 0;

	bool setMinFilter(GLenum filter);
	bool setMagFilter(GLenum filter);
	bool setWrapS(GLenum wrap);
	bool setWrapT(GLenum wrap);
	bool setWrapR(GLenum wrap);
	bool setMaxAnisotropy(GLfloat textureMaxAnisotropy);
	bool setBaseLevel(GLint baseLevel);
	bool setCompareFunc(GLenum compareFunc);
	bool setCompareMode(GLenum compareMode);
	void makeImmutable(GLsizei levels);
	bool setMaxLevel(GLint maxLevel);
	bool setMaxLOD(GLfloat maxLOD);
	bool setMinLOD(GLfloat minLOD);
	bool setSwizzleR(GLenum swizzleR);
	bool setSwizzleG(GLenum swizzleG);
	bool setSwizzleB(GLenum swizzleB);
	bool setSwizzleA(GLenum swizzleA);

	GLenum getMinFilter() const;
	GLenum getMagFilter() const;
	GLenum getWrapS() const;
	GLenum getWrapT() const;
	GLenum getWrapR() const;
	GLfloat getMaxAnisotropy() const;
	GLint getBaseLevel() const;
	GLenum getCompareFunc() const;
	GLenum getCompareMode() const;
	GLboolean getImmutableFormat() const;
	GLsizei getImmutableLevels() const;
	GLint getMaxLevel() const;
	GLfloat getMaxLOD() const;
	GLfloat getMinLOD() const;
	GLenum getSwizzleR() const;
	GLenum getSwizzleG() const;
	GLenum getSwizzleB() const;
	GLenum getSwizzleA() const;

	virtual GLsizei getWidth(GLenum target, GLint level) const = 0;
	virtual GLsizei getHeight(GLenum target, GLint level) const = 0;
	virtual GLsizei getDepth(GLenum target, GLint level) const;
	virtual GLenum getFormat(GLenum target, GLint level) const = 0;
	virtual GLenum getType(GLenum target, GLint level) const = 0;
	virtual int getTopLevel() const = 0;

	virtual bool isSamplerComplete() const = 0;
	virtual bool isCompressed(GLenum target, GLint level) const = 0;
	virtual bool isDepth(GLenum target, GLint level) const = 0;

	virtual Renderbuffer *getRenderbuffer(GLenum target, GLint level) = 0;
	virtual egl::Image *getRenderTarget(GLenum target, unsigned int level) = 0;
	egl::Image *createSharedImage(GLenum target, unsigned int level);
	virtual bool isShared(GLenum target, unsigned int level) const = 0;

	virtual void generateMipmaps() = 0;
	virtual void copySubImage(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source) = 0;

	protected:
	~Texture() override;

	void setImage(egl::Context context, GLenum format, GLenum type, const egl::Image::UnpackInfo& unpackInfo, const void pixels, egl::Image *image);
	void subImage(egl::Context context, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const egl::Image::UnpackInfo& unpackInfo, const void pixels, egl::Image *image);
	void setCompressedImage(GLsizei imageSize, const void pixels, egl::Image image);
	void subImageCompressed(GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const void pixels, egl::Image image);

	bool copy(egl::Image source, const sw::SliceRect &sourceRect, GLint xoffset, GLint yoffset, GLint zoffset, egl::Image dest);

	bool isMipmapFiltered() const;

	GLenum mMinFilter;
	GLenum mMagFilter;
	GLenum mWrapS;
	GLenum mWrapT;
	GLenum mWrapR;
	GLfloat mMaxAnisotropy;
	GLint mBaseLevel;
	GLenum mCompareFunc;
	GLenum mCompareMode;
	GLboolean mImmutableFormat;
	GLsizei mImmutableLevels;
	GLint mMaxLevel;
	GLfloat mMaxLOD;
	GLfloat mMinLOD;
	GLenum mSwizzleR;
	GLenum mSwizzleG;
	GLenum mSwizzleB;
	GLenum mSwizzleA;

	sw::Resource *resource;
	};

	class Texture2D : public Texture
	{
	public:
	explicit Texture2D(GLuint name);

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

	GLenum getTarget() const override;

	GLsizei getWidth(GLenum target, GLint level) const override;
	GLsizei getHeight(GLenum target, GLint level) const override;
	GLenum getFormat(GLenum target, GLint level) const override;
	GLenum getType(GLenum target, GLint level) const override;
	int getTopLevel() const override;

	void setImage(egl::Context context, GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, const egl::Image::UnpackInfo& unpackInfo, const void pixels);
	void setCompressedImage(GLint level, GLenum format, GLsizei width, GLsizei height, GLsizei imageSize, const void *pixels);
	void subImage(egl::Context context, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const egl::Image::UnpackInfo& unpackInfo, const void pixels);
	void subImageCompressed(GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const void *pixels);
	void copyImage(GLint level, GLenum format, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source);
	void copySubImage(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source) override;

	void setSharedImage(egl::Image *image);

	bool isSamplerComplete() const override;
	bool isCompressed(GLenum target, GLint level) const override;
	bool isDepth(GLenum target, GLint level) const override;
	void bindTexImage(gl::Surface *surface);
	void releaseTexImage() override;

	void generateMipmaps() override;

	Renderbuffer *getRenderbuffer(GLenum target, GLint level) override;
	egl::Image *getRenderTarget(GLenum target, unsigned int level) override;
	bool isShared(GLenum target, unsigned int level) const override;

	egl::Image *getImage(unsigned int level);

	protected:
	~Texture2D() override;

	bool isMipmapComplete() const;

	egl::Image *image[IMPLEMENTATION_MAX_TEXTURE_LEVELS];

	gl::Surface *mSurface;

	// A specific internal reference count is kept for colorbuffer proxy references,
	// because, as the renderbuffer acting as proxy will maintain a binding pointer
	// back to this texture, there would be a circular reference if we used a binding
	// pointer here. This reference count will cause the pointer to be set to null if
	// the count drops to zero, but will not cause deletion of the Renderbuffer.
	Renderbuffer *mColorbufferProxy;
	unsigned int mProxyRefs;
	};

	class TextureCubeMap : public Texture
	{
	public:
	explicit TextureCubeMap(GLuint name);

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

	GLenum getTarget() const override;

	GLsizei getWidth(GLenum target, GLint level) const override;
	GLsizei getHeight(GLenum target, GLint level) const override;
	GLenum getFormat(GLenum target, GLint level) const override;
	GLenum getType(GLenum target, GLint level) const override;
	int getTopLevel() const override;

	void setImage(egl::Context context, GLenum target, GLint level, GLsizei width, GLsizei height, GLenum format, GLenum type, const egl::Image::UnpackInfo& unpackInfo, const void pixels);
	void setCompressedImage(GLenum target, GLint level, GLenum format, GLsizei width, GLsizei height, GLsizei imageSize, const void *pixels);

	void subImage(egl::Context context, GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, const egl::Image::UnpackInfo& unpackInfo, const void pixels);
	void subImageCompressed(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLsizei imageSize, const void *pixels);
	void copyImage(GLenum target, GLint level, GLenum format, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source);
	void copySubImage(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source) override;

	bool isSamplerComplete() const override;
	bool isCompressed(GLenum target, GLint level) const override;
	bool isDepth(GLenum target, GLint level) const override;
	void releaseTexImage() override;

	void generateMipmaps() override;
	void updateBorders(int level);

	Renderbuffer *getRenderbuffer(GLenum target, GLint level) override;
	egl::Image *getRenderTarget(GLenum target, unsigned int level) override;
	bool isShared(GLenum target, unsigned int level) const override;

	egl::Image *getImage(int face, unsigned int level);

	bool isCubeComplete() const;

	protected:
	~TextureCubeMap() override;

	private:
	bool isMipmapCubeComplete() const;

	// face is one of the GL_TEXTURE_CUBE_MAP_* enumerants. Returns nullptr on failure.
	egl::Image *getImage(GLenum face, unsigned int level);

	egl::Image *image[6][IMPLEMENTATION_MAX_TEXTURE_LEVELS];

	// A specific internal reference count is kept for colorbuffer proxy references,
	// because, as the renderbuffer acting as proxy will maintain a binding pointer
	// back to this texture, there would be a circular reference if we used a binding
	// pointer here. This reference count will cause the pointer to be set to null if
	// the count drops to zero, but will not cause deletion of the Renderbuffer.
	Renderbuffer *mFaceProxies[6];
	unsigned int mFaceProxyRefs[6];
	};

	class Texture3D : public Texture
	{
	public:
	explicit Texture3D(GLuint name);

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

	GLenum getTarget() const override;

	GLsizei getWidth(GLenum target, GLint level) const override;
	GLsizei getHeight(GLenum target, GLint level) const override;
	GLsizei getDepth(GLenum target, GLint level) const override;
	GLenum getFormat(GLenum target, GLint level) const override;
	GLenum getType(GLenum target, GLint level) const override;
	int getTopLevel() const override;

	void setImage(egl::Context context, GLint level, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const egl::Image::UnpackInfo& unpackInfo, const void pixels);
	void setCompressedImage(GLint level, GLenum format, GLsizei width, GLsizei height, GLsizei depth, GLsizei imageSize, const void *pixels);
	void subImage(egl::Context context, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLenum type, const egl::Image::UnpackInfo& unpackInfo, const void pixels);
	void subImageCompressed(GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLsizei width, GLsizei height, GLsizei depth, GLenum format, GLsizei imageSize, const void *pixels);
	void copyImage(GLint level, GLenum format, GLint x, GLint y, GLint z, GLsizei width, GLsizei height, GLsizei depth, Framebuffer *source);
	void copySubImage(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint zoffset, GLint x, GLint y, GLsizei width, GLsizei height, Framebuffer *source);

	void setSharedImage(egl::Image *image);

	bool isSamplerComplete() const override;
	bool isCompressed(GLenum target, GLint level) const override;
	bool isDepth(GLenum target, GLint level) const override;
	void releaseTexImage() override;

	void generateMipmaps() override;

	Renderbuffer *getRenderbuffer(GLenum target, GLint level) override;
	egl::Image *getRenderTarget(GLenum target, unsigned int level) override;
	bool isShared(GLenum target, unsigned int level) const override;

	egl::Image *getImage(unsigned int level);

	protected:
	~Texture3D() override;

	bool isMipmapComplete() const;

	egl::Image *image[IMPLEMENTATION_MAX_TEXTURE_LEVELS];

	gl::Surface *mSurface;

	// A specific internal reference count is kept for colorbuffer proxy references,
	// because, as the renderbuffer acting as proxy will maintain a binding pointer
	// back to this texture, there would be a circular reference if we used a binding
	// pointer here. This reference count will cause the pointer to be set to null if
	// the count drops to zero, but will not cause deletion of the Renderbuffer.
	Renderbuffer *mColorbufferProxy;
	unsigned int mProxyRefs;
	};

	class Texture2DArray : public Texture3D
	{
	public:
	explicit Texture2DArray(GLuint name);

	GLenum getTarget() const override;
	void generateMipmaps() override;

	protected:
	~Texture2DArray() override;
	};

	class TextureExternal : public Texture2D
	{
	public:
	explicit TextureExternal(GLuint name);

	GLenum getTarget() const override;

	protected:
	~TextureExternal() override;
	};
	}

	#endif // LIBGLESV2_TEXTURE_H_