/* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).

 *

 * Permission is hereby granted, free of charge, to any person obtaining a

 * copy of this software and /or associated documentation files

 * (the "Materials "), to deal in the Materials without restriction,

 * including without limitation the rights to use, copy, modify, merge,

 * publish, distribute, sublicense, and/or sell copies of the Materials,

 * and to permit persons to whom the Materials are furnished to do so,

 * subject to the following conditions:

 *

 * The above copyright notice and this permission notice shall be included

 * in all copies or substantial portions of the Materials.

 *

 * THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,

 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR

 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE MATERIALS OR

 * THE USE OR OTHER DEALINGS IN THE MATERIALS.

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description:

 *

 */

#ifndef _GLESCONTEXT_H_

#define _GLESCONTEXT_H_

#include <GLES/gl.h>

#include <map>

#include <iostream>

#include "GLESArray.h"

#include "glesInternal.h"

#include "GLESDesktopGL.h"

#include "glesOS.h"

#include "EGLInterface.h"

struct GLESBuffer;

class GLESTexture;

struct GLESTextureLevel;

namespace

{

typedef std::map<unsigned int, GLESBuffer*> BufferMap;

typedef std::map<unsigned int, GLESTexture*> TextureMap;

}

enum GLESArrayFlag

{

	GLES_INVALID_ARRAY			= 0,

	GLES_VERTEX_ARRAY			= 1 << 0,

	GLES_NORMAL_ARRAY			= 1 << 1,

	GLES_COLOR_ARRAY			= 1 << 2,

	GLES_POINT_SIZE_ARRAY		= 1 << 3,

	GLES_TEXTURE_COORD_ARRAY	= 1 << 4

};

class GLESContext {

public:

	GLESContext(void* nativeContext);

	~GLESContext();

	bool Initialize();

	bool IsInitialized() const { return m_initialized; }

	const GLESDesktopGL& DGL() const { return m_dgl; }

	void* NativeContext() const { return m_nativeContext; }

	GLenum Error() const { return m_error; }

	GLenum GetHostError();

	unsigned int MaxTextureLevel() const { return m_maxTextureLevel; }

	unsigned int MaxTextureUnits() const { return m_maxTextureUnits; }

	unsigned int MaxClipPlanes() const { return m_maxClipPlanes; }

	unsigned int MaxLights() const { return m_maxLights; }

	int ClientActiveTexture() const { return m_clientActiveTexture; }

	GLESArray& VertexArray() { return m_vertexArray; }

	const GLESArray& VertexArray() const { return m_vertexArray; }

	GLESArray& NormalArray() { return m_normalArray; }

	const GLESArray& NormalArray() const { return m_normalArray; }

	GLESArray& ColorArray() { return m_colorArray; }

	const GLESArray& ColorArray() const { return m_colorArray; }

	const GLESArray& PointSizeArray() const { return m_pointSizeArray; }

	GLESArray& TexCoordArray(unsigned int texture);

	GLESArray& TexCoordArray();

	const GLESArray& TexCoordArray(unsigned int texture) const;

	const GLESArray& TexCoordArray() const;

	unsigned int ArrayBufferBinding() const { return m_arrayBufferBinding; }

	GLESBuffer* ArrayBuffer();

	unsigned int ElementArrayBufferBinding() const { return m_elementArrayBufferBinding; }

	GLESBuffer* ElementArrayBuffer();

	const GLESBuffer* Buffer(unsigned int buffer) const;

	unsigned int TextureBinding() const { return m_textureBinding; }

	GLESTexture* Texture(unsigned int name);

	const GLESTextureLevel* TextureLevel(GLint level) const;

	bool IsArrayEnabled(GLESArrayFlag array) const { return !!(m_enabledArrays & array); }

	void SetError(GLenum error) { m_error = error; }

	void SetClientActiveTexture(int texture) { m_clientActiveTexture = texture; }

	void SetVertexArray(int size, GLenum type, int stride, const void *pointer);

	void SetNormalArray(GLenum type, int stride, const void *pointer);

	void SetColorArray(int size, GLenum type, int stride, const void *pointer);

	void SetPointerSizeArray(GLenum type, int stride, const void *pointer);

	void SetTexCoordArray(int size, GLenum type, int stride, const void *pointer);

	void EnableArray(GLESArrayFlag array) { m_enabledArrays |= array; }

	void DisableArray(GLESArrayFlag array) { m_enabledArrays &= ~array; }

	void ReserveBufferNames(int num, unsigned int* names);

	void DeleteBuffer(unsigned int buffer);

	bool BindArrayBuffer(unsigned int buffer);

	bool BindElementArrayBuffer(unsigned int buffer);

	void DeleteTexture(unsigned int texture);

	bool BindTexture(unsigned int texture);

private:

	bool m_initialized;

	void* m_nativeContext;

	GLESDesktopGL m_dgl;

	GLenum m_error;

	unsigned int m_maxTextureLevel;

	unsigned int m_maxTextureUnits;

	unsigned int m_maxClipPlanes;

	unsigned int m_maxLights;

	int m_clientActiveTexture;

	GLESArray m_vertexArray;

	GLESArray m_normalArray;

	GLESArray m_colorArray;

	GLESArray m_pointSizeArray;

	GLESArray* m_texCoordArray;

	unsigned int m_enabledArrays;

	unsigned int m_arrayBufferBinding;

	unsigned int m_elementArrayBufferBinding;

	unsigned int m_textureBinding;

	BufferMap m_buffers;

	TextureMap m_textures;

};

void* glesGetCurrentGLESContext();

#define GLES_ENTER_RET(RETVAL) \

	GLESContext* ctx; \

	do \

	{ \

		glesGetLock(); \

		ctx = (GLESContext*)glesGetCurrentGLESContext(); \

		if(!ctx) \

		{ \

			glesReleaseLock(); \

			return RETVAL; \

		} \

		if(!ctx->IsInitialized()) \

		{ \

			if(!ctx->Initialize()) \

			{ \

				std::cerr << "Failed to initialize context" << std::endl; \

				exit(1); \

			} \

		} \

	} while(0)

#define GLES_ENTER() GLES_ENTER_RET(GLES_NO_RETVAL)

// Check the host error after every API function call so that the error flag

// in the wrapper always contains the latest error.

#define GLES_LEAVE_RET(RETVAL) \

	do \

	{ \

		ctx->GetHostError(); \

		glesReleaseLock(); \

		return RETVAL; \

	} while(0)

#define GLES_LEAVE() GLES_LEAVE_RET(GLES_NO_RETVAL)

#define GLES_LEAVE_NO_ERROR_CHECK_RET(RETVAL) \

	do \

	{ \

		glesReleaseLock(); \

		return RETVAL; \

	} while(0)

#define GLES_LEAVE_NO_ERROR_CHECK() GLES_LEAVE_NO_ERROR_CHECK_RET(GLES_NO_RETVAL)

#define GLES_ERROR_IF_RET(COND, ERROR, RETVAL) \

	do \

	{ \

		if(COND) \

		{ \

			ctx->SetError(ERROR); \

			return RETVAL; \

		} \

	} while(0)

#define GLES_ERROR_IF(COND, ERROR) GLES_ERROR_IF_RET(COND, ERROR, GLES_NO_RETVAL)

#define GLES_ERROR_RET(ERROR, RETVAL) GLES_ERROR_IF_RET(true, ERROR, RETVAL)

#define GLES_ERROR(ERROR) GLES_ERROR_IF(true, ERROR)