#ifndef _GLUTEXTURE_HPP
#define _GLUTEXTURE_HPP
/*-------------------------------------------------------------------------
 * drawElements Quality Program OpenGL ES Utilities
 * ------------------------------------------------
 *
 * Copyright 2014 The Android Open Source Project
 *
 * 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.
 *
 *//*!
 * \file
 * \brief Texture classes.
 *//*--------------------------------------------------------------------*/

#include "gluDefs.hpp"
#include "tcuTexture.hpp"
#include "tcuCompressedTexture.hpp"
#include "tcuResource.hpp"
#include "gluRenderContext.hpp"
#include "gluContextInfo.hpp"
#include "deArrayBuffer.hpp"

#include <vector>
#include <string>

namespace glu
{

/*--------------------------------------------------------------------*//*!
 * \brief 1D Texture only supported on OpenGL
 *//*--------------------------------------------------------------------*/
class Texture1D
{
public:
							Texture1D				(const RenderContext& context, deUint32 format, deUint32 dataType, int width);
							Texture1D				(const RenderContext& context, deUint32 internalFormat, int width);
							~Texture1D				(void);

	tcu::Texture1D&			getRefTexture			(void)			{ return m_refTexture;	}
	const tcu::Texture1D&	getRefTexture			(void) const	{ return m_refTexture;	}
	deUint32				getGLTexture			(void) const	{ return m_glTexture;	}

	void					upload					(void);

private:
							Texture1D				(const Texture1D& other); // Not allowed!
	Texture1D&				operator=				(const Texture1D& other); // Not allowed!

	const RenderContext&	m_context;
	deUint32				m_format;				//!< Internal format.
	tcu::Texture1D			m_refTexture;
	deUint32				m_glTexture;
} DE_WARN_UNUSED_TYPE;

/*--------------------------------------------------------------------*//*!
 * \brief 2D Texture
 *//*--------------------------------------------------------------------*/
class Texture2D
{
public:
							Texture2D				(const RenderContext& context, const ContextInfo& contextInfo, int numLevels, const tcu::CompressedTexture* levels, const tcu::TexDecompressionParams& decompressionParams = tcu::TexDecompressionParams());
							Texture2D				(const RenderContext& context, deUint32 format, deUint32 dataType, int width, int height);
							Texture2D				(const RenderContext& context, deUint32 internalFormat, int width, int height);
	virtual					~Texture2D				(void);

	virtual void			upload					(void); // Not supported on compressed textures.

	tcu::Texture2D&			getRefTexture			(void)			{ return m_refTexture;	}
	const tcu::Texture2D&	getRefTexture			(void) const	{ return m_refTexture;	}
	deUint32				getGLTexture			(void) const	{ return m_glTexture;	}

	static Texture2D*		create					(const RenderContext& context, const ContextInfo& contextInfo, const tcu::Archive& archive, int numLevels, const std::vector<std::string>& filenames);
	static Texture2D*		create					(const RenderContext& context, const ContextInfo& contextInfo, const tcu::Archive& archive, int numLevels, const char* const* filenames);
	static Texture2D*		create					(const RenderContext& context, const ContextInfo& contextInfo, const tcu::Archive& archive, const char* filename) { return create(context, contextInfo, archive, 1, &filename); }

protected:
	const RenderContext&	m_context;

	bool					m_isCompressed;
	deUint32				m_format;               //!< Internal format.
	tcu::Texture2D			m_refTexture;

	deUint32				m_glTexture;

private:
							Texture2D				(const Texture2D& other); // Not allowed!
	Texture2D&				operator=				(const Texture2D& other); // Not allowed!

	void					loadCompressed			(int numLevels, const tcu::CompressedTexture* levels, const tcu::TexDecompressionParams& decompressionParams);
} DE_WARN_UNUSED_TYPE;

class ImmutableTexture2D : public Texture2D
{
public:
							ImmutableTexture2D		(const RenderContext& context, deUint32 internalFormat, int width, int height);

	void					upload					(void); // Not supported on compressed textures.

private:
							ImmutableTexture2D		(const ImmutableTexture2D& other); // Not allowed!
	ImmutableTexture2D&		operator=				(const ImmutableTexture2D& other); // Not allowed!
};

/*--------------------------------------------------------------------*//*!
 * \brief Cube Map Texture
 *//*--------------------------------------------------------------------*/
class TextureCube
{
public:
	// For compressed cubemap constructor and create() function input level pointers / filenames are expected
	// to laid out to array in following order:
	//   { l0_neg_x, l0_pos_x, l0_neg_y, l0_pos_y, l0_neg_z, l0_pos_z, l1_neg_x, l1_pos_x, ... }

							TextureCube				(const RenderContext& context, const ContextInfo& contextInfo, int numLevels, const tcu::CompressedTexture* levels, const tcu::TexDecompressionParams& decompressionParams = tcu::TexDecompressionParams());
							TextureCube				(const RenderContext& context, deUint32 format, deUint32 dataType, int size);
							TextureCube				(const RenderContext& context, deUint32 internalFormat, int size);
							~TextureCube			(void);

	void					upload					(void); // Not supported on compressed textures.

	tcu::TextureCube&		getRefTexture			(void)			{ return m_refTexture;	}
	const tcu::TextureCube&	getRefTexture			(void) const	{ return m_refTexture;	}
	deUint32				getGLTexture			(void) const	{ return m_glTexture;	}

	static TextureCube*		create					(const RenderContext& context, const ContextInfo& contextInfo, const tcu::Archive& archive, int numLevels, const std::vector<std::string>& filenames);
	static TextureCube*		create					(const RenderContext& context, const ContextInfo& contextInfo, const tcu::Archive& archive, int numLevels, const char* const* filenames);

private:
							TextureCube				(const TextureCube& other); // Not allowed!
	TextureCube&			operator=				(const TextureCube& other); // Not allowed!

	void					loadCompressed			(int numLevels, const tcu::CompressedTexture* levels, const tcu::TexDecompressionParams& decompressionParams);

	const RenderContext&	m_context;

	bool					m_isCompressed;
	deUint32				m_format;				//!< Internal format.

	tcu::TextureCube		m_refTexture;
	deUint32				m_glTexture;
} DE_WARN_UNUSED_TYPE;

/*--------------------------------------------------------------------*//*!
 * \brief 2D Array Texture
 * \note Not supported on OpenGL ES 2
 *//*--------------------------------------------------------------------*/
class Texture2DArray
{
public:
								Texture2DArray			(const RenderContext& context, deUint32 format, deUint32 dataType, int width, int height, int numLayers);
								Texture2DArray			(const RenderContext& context, deUint32 internalFormat, int width, int height, int numLayers);
								Texture2DArray			(const RenderContext& context, const ContextInfo& contextInfo, int numLevels, const tcu::CompressedTexture* levels, const tcu::TexDecompressionParams& decompressionParams = tcu::TexDecompressionParams());
								~Texture2DArray			(void);

	void						upload					(void);

	tcu::Texture2DArray&		getRefTexture			(void)			{ return m_refTexture;	}
	const tcu::Texture2DArray&	getRefTexture			(void) const	{ return m_refTexture;	}
	deUint32					getGLTexture			(void) const	{ return m_glTexture;	}

private:
								Texture2DArray			(const Texture2DArray& other); // Not allowed!
	Texture2DArray&				operator=				(const Texture2DArray& other); // Not allowed!

	void						loadCompressed			(int numLevels, const tcu::CompressedTexture* levels, const tcu::TexDecompressionParams& decompressionParams);


	const RenderContext&		m_context;

	bool						m_isCompressed;
	deUint32					m_format;				//!< Internal format.

	tcu::Texture2DArray			m_refTexture;
	deUint32					m_glTexture;
} DE_WARN_UNUSED_TYPE;

/*--------------------------------------------------------------------*//*!
 * \brief 1D Array Texture
 * \note Only supported on OpenGL
 *//*--------------------------------------------------------------------*/
class Texture1DArray
{
public:
								Texture1DArray			(const RenderContext& context, deUint32 format, deUint32 dataType, int width, int numLayers);
								Texture1DArray			(const RenderContext& context, deUint32 internalFormat, int width, int numLayers);
								~Texture1DArray			(void);

	void						upload					(void);

	tcu::Texture1DArray&		getRefTexture			(void)			{ return m_refTexture;	}
	const tcu::Texture1DArray&	getRefTexture			(void) const	{ return m_refTexture;	}
	deUint32					getGLTexture			(void) const	{ return m_glTexture;	}

private:
								Texture1DArray			(const Texture1DArray& other); // Not allowed!
	Texture1DArray&				operator=				(const Texture1DArray& other); // Not allowed!

	const RenderContext&		m_context;

	deUint32					m_format;				//!< Internal format.

	tcu::Texture1DArray			m_refTexture;
	deUint32					m_glTexture;
} DE_WARN_UNUSED_TYPE;

/*--------------------------------------------------------------------*//*!
 * \brief 3D Texture
 * \note Not supported on OpenGL ES 2
 *//*--------------------------------------------------------------------*/
class Texture3D
{
public:
								Texture3D			(const RenderContext& context, deUint32 format, deUint32 dataType, int width, int height, int depth);
								Texture3D			(const RenderContext& context, deUint32 internalFormat, int width, int height, int depth);
								Texture3D			(const RenderContext& context, const ContextInfo& contextInfo, int numLevels, const tcu::CompressedTexture* levels, const tcu::TexDecompressionParams& decompressionParams = tcu::TexDecompressionParams());
								~Texture3D			(void);

	void						upload				(void);

	tcu::Texture3D&				getRefTexture		(void)			{ return m_refTexture;	}
	const tcu::Texture3D&		getRefTexture		(void) const	{ return m_refTexture;	}
	deUint32					getGLTexture		(void) const	{ return m_glTexture;	}

private:
								Texture3D			(const Texture3D& other); // Not allowed!
	Texture3D&					operator=			(const Texture3D& other); // Not allowed!

	void						loadCompressed		(int numLevels, const tcu::CompressedTexture* levels, const tcu::TexDecompressionParams& decompressionParams);

	const RenderContext&		m_context;

	bool						m_isCompressed;
	deUint32					m_format;			//!< Internal format.

	tcu::Texture3D				m_refTexture;
	deUint32					m_glTexture;
} DE_WARN_UNUSED_TYPE;

/*--------------------------------------------------------------------*//*!
 * \brief Cube Map Array Texture
 * \note Not supported on OpenGL ES 3.0 or lower
 *//*--------------------------------------------------------------------*/
class TextureCubeArray
{
public:
									TextureCubeArray	(const RenderContext& context, deUint32 format, deUint32 dataType, int size, int numLayers);
									TextureCubeArray	(const RenderContext& context, deUint32 internalFormat, int size, int numLayers);

									~TextureCubeArray	(void);

	void							upload				(void);

	tcu::TextureCubeArray&			getRefTexture		(void)			{ return m_refTexture;	}
	const tcu::TextureCubeArray&	getRefTexture		(void) const	{ return m_refTexture;	}
	deUint32						getGLTexture		(void) const	{ return m_glTexture;	}

private:
									TextureCubeArray	(const TextureCubeArray& other); // Not allowed!
	TextureCubeArray&				operator=			(const TextureCubeArray& other); // Not allowed!

	const RenderContext&			m_context;

	bool							m_isCompressed;
	deUint32						m_format;			//!< Internal format.

	tcu::TextureCubeArray			m_refTexture;
	deUint32						m_glTexture;
} DE_WARN_UNUSED_TYPE;

/*--------------------------------------------------------------------*//*!
 * \brief 1D Texture Buffer only supported on OpenGL
 *//*--------------------------------------------------------------------*/
class TextureBuffer
{
public:
										TextureBuffer		(const RenderContext& context, deUint32 internalFormat, size_t bufferSize);
										TextureBuffer		(const RenderContext& context, deUint32 internalFormat, size_t bufferSize, size_t offset, size_t size, const void* data = DE_NULL);

										~TextureBuffer		(void);

	// \note Effective pixel buffer access must be limited to w <= GL_MAX_TEXTURE_BUFFER_SIZE
	const tcu::PixelBufferAccess		getFullRefTexture	(void);
	const tcu::ConstPixelBufferAccess	getFullRefTexture	(void) const;

	// \note mutating buffer storage will invalidate existing pixel buffer accesses
	de::ArrayBuffer<deUint8>&			getRefBuffer		(void)			{ return m_refBuffer;			}
	const de::ArrayBuffer<deUint8>&		getRefBuffer		(void) const	{ return m_refBuffer;			}

	size_t								getSize				(void) const	{ return m_size;				}
	size_t								getOffset			(void) const	{ return m_offset;				}
	size_t								getBufferSize		(void) const	{ return m_refBuffer.size();	}

	deUint32							getGLTexture		(void) const	{ return m_glTexture;			}
	deUint32							getGLBuffer			(void) const	{ return m_glBuffer;			}

	void								upload				(void);

private:
	void								init				(deUint32 internalFormat, size_t bufferSize, size_t offset, size_t size, const void* data);
										TextureBuffer		(const TextureBuffer& other); // Not allowed!
	TextureBuffer&						operator=			(const TextureBuffer& other); // Not allowed!

	const RenderContext&				m_context;
	deUint32							m_format;		//!< Internal format.
	de::ArrayBuffer<deUint8>			m_refBuffer;
	size_t								m_offset;
	size_t								m_size;

	deUint32							m_glTexture;
	deUint32							m_glBuffer;
} DE_WARN_UNUSED_TYPE;

} // glu

#endif // _GLUTEXTURE_HPP