// SwiftShader Software Renderer
//
// Copyright(c) 2005-2013 TransGaming Inc.
//
// All rights reserved. No part of this software may be copied, distributed, transmitted,
// transcribed, stored in a retrieval system, translated into any human or computer
// language by any means, or disclosed to third parties without the explicit written
// agreement of TransGaming Inc. Without such an agreement, no rights or licenses, express
// or implied, including but not limited to any patent rights, are granted to you.
//
// libGL.cpp: Implements the exported OpenGL functions.

#include "main.h"
#include "mathutil.h"
#include "utilities.h"
#include "Buffer.h"
#include "Context.h"
#include "Fence.h"
#include "Framebuffer.h"
#include "Program.h"
#include "Renderbuffer.h"
#include "Shader.h"
#include "Texture.h"
#include "Query.h"
#include "common/debug.h"
#include "Common/Version.h"
#include "Main/Register.hpp"

#define GL_APICALL
#include <GLES2/gl2.h>
#include <GLES2/gl2ext.h>

#include <exception>
#include <limits>

static bool validImageSize(GLint level, GLsizei width, GLsizei height)
{
	if(level < 0 || level >= gl::IMPLEMENTATION_MAX_TEXTURE_LEVELS || width < 0 || height < 0)
	{
		return false;
	}

	return true;
}

static bool validateSubImageParams(bool compressed, GLsizei width, GLsizei height, GLint xoffset, GLint yoffset, GLenum target, GLint level, GLenum format, gl::Texture *texture)
{
	if(!texture)
	{
		return error(GL_INVALID_OPERATION, false);
	}

	if(compressed != texture->isCompressed(target, level))
	{
		return error(GL_INVALID_OPERATION, false);
	}

	if(format != GL_NONE && format != texture->getFormat(target, level))
	{
		return error(GL_INVALID_OPERATION, false);
	}

	if(compressed)
	{
		if((width % 4 != 0 && width != texture->getWidth(target, 0)) ||
		   (height % 4 != 0 && height != texture->getHeight(target, 0)))
		{
			return error(GL_INVALID_OPERATION, false);
		}
	}

	if(xoffset + width > texture->getWidth(target, level) ||
	   yoffset + height > texture->getHeight(target, level))
	{
		return error(GL_INVALID_VALUE, false);
	}

	return true;
}

// Check for combinations of format and type that are valid for ReadPixels
static bool validReadFormatType(GLenum format, GLenum type)
{
	switch(format)
	{
	case GL_RGBA:
		switch(type)
		{
		case GL_UNSIGNED_BYTE:
			break;
		default:
			return false;
		}
		break;
	case GL_BGRA_EXT:
		switch(type)
		{
		case GL_UNSIGNED_BYTE:
		case GL_UNSIGNED_SHORT_4_4_4_4_REV_EXT:
		case GL_UNSIGNED_SHORT_1_5_5_5_REV_EXT:
			break;
		default:
			return false;
		}
		break;
	case gl::IMPLEMENTATION_COLOR_READ_FORMAT:
		switch(type)
		{
		case gl::IMPLEMENTATION_COLOR_READ_TYPE:
			break;
		default:
			return false;
		}
		break;
	default:
		return false;
	}

	return true;
}

extern "C"
{

void GL_APIENTRY glActiveTexture(GLenum texture)
{
	TRACE("(GLenum texture = 0x%X)", texture);

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(texture < GL_TEXTURE0 || texture > GL_TEXTURE0 + gl::MAX_COMBINED_TEXTURE_IMAGE_UNITS - 1)
		{
			return error(GL_INVALID_ENUM);
		}

		context->setActiveSampler(texture - GL_TEXTURE0);
	}
}

void GL_APIENTRY glAttachShader(GLuint program, GLuint shader)
{
	TRACE("(GLuint program = %d, GLuint shader = %d)", program, shader);

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *programObject = context->getProgram(program);
		gl::Shader *shaderObject = context->getShader(shader);

		if(!programObject)
		{
			if(context->getShader(program))
			{
				return error(GL_INVALID_OPERATION);
			}
			else
			{
				return error(GL_INVALID_VALUE);
			}
		}

		if(!shaderObject)
		{
			if(context->getProgram(shader))
			{
				return error(GL_INVALID_OPERATION);
			}
			else
			{
				return error(GL_INVALID_VALUE);
			}
		}

		if(!programObject->attachShader(shaderObject))
		{
			return error(GL_INVALID_OPERATION);
		}
	}
}

void GL_APIENTRY glBeginQueryEXT(GLenum target, GLuint name)
{
	TRACE("(GLenum target = 0x%X, GLuint name = %d)", target, name);

	switch(target)
	{
	case GL_ANY_SAMPLES_PASSED_EXT:
	case GL_ANY_SAMPLES_PASSED_CONSERVATIVE_EXT:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	if(name == 0)
	{
		return error(GL_INVALID_OPERATION);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->beginQuery(target, name);
	}
}

void GL_APIENTRY glBindAttribLocation(GLuint program, GLuint index, const GLchar* name)
{
	TRACE("(GLuint program = %d, GLuint index = %d, const GLchar* name = %s)", program, index, name);

	if(index >= gl::MAX_VERTEX_ATTRIBS)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *programObject = context->getProgram(program);

		if(!programObject)
		{
			if(context->getShader(program))
			{
				return error(GL_INVALID_OPERATION);
			}
			else
			{
				return error(GL_INVALID_VALUE);
			}
		}

		if(strncmp(name, "gl_", 3) == 0)
		{
			return error(GL_INVALID_OPERATION);
		}

		programObject->bindAttributeLocation(index, name);
	}
}

void GL_APIENTRY glBindBuffer(GLenum target, GLuint buffer)
{
	TRACE("(GLenum target = 0x%X, GLuint buffer = %d)", target, buffer);

	gl::Context *context = gl::getContext();

	if(context)
	{
		switch(target)
		{
		case GL_ARRAY_BUFFER:
			context->bindArrayBuffer(buffer);
			return;
		case GL_ELEMENT_ARRAY_BUFFER:
			context->bindElementArrayBuffer(buffer);
			return;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY glBindFramebuffer(GLenum target, GLuint framebuffer)
{
	TRACE("(GLenum target = 0x%X, GLuint framebuffer = %d)", target, framebuffer);

	if(target != GL_FRAMEBUFFER && target != GL_DRAW_FRAMEBUFFER_ANGLE && target != GL_READ_FRAMEBUFFER_ANGLE)
	{
		return error(GL_INVALID_ENUM);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(target == GL_READ_FRAMEBUFFER_ANGLE || target == GL_FRAMEBUFFER)
		{
			context->bindReadFramebuffer(framebuffer);
		}

		if(target == GL_DRAW_FRAMEBUFFER_ANGLE || target == GL_FRAMEBUFFER)
		{
			context->bindDrawFramebuffer(framebuffer);
		}
	}
}

void GL_APIENTRY glBindRenderbuffer(GLenum target, GLuint renderbuffer)
{
	TRACE("(GLenum target = 0x%X, GLuint renderbuffer = %d)", target, renderbuffer);

	if(target != GL_RENDERBUFFER)
	{
		return error(GL_INVALID_ENUM);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(renderbuffer != 0 && !context->getRenderbuffer(renderbuffer))
		{
			// [OpenGL ES 2.0.25] Section 4.4.3 page 112
			// [OpenGL ES 3.0.2] Section 4.4.2 page 201
			// 'renderbuffer' must be either zero or the name of an existing renderbuffer object of
			// type 'renderbuffertarget', otherwise an INVALID_OPERATION error is generated.
			return error(GL_INVALID_OPERATION);
		}

		context->bindRenderbuffer(renderbuffer);
	}
}

void GL_APIENTRY glBindTexture(GLenum target, GLuint texture)
{
	TRACE("(GLenum target = 0x%X, GLuint texture = %d)", target, texture);

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Texture *textureObject = context->getTexture(texture);

		if(textureObject && textureObject->getTarget() != target && texture != 0)
		{
			return error(GL_INVALID_OPERATION);
		}

		switch(target)
		{
		case GL_TEXTURE_2D:
			context->bindTexture2D(texture);
			return;
		case GL_TEXTURE_CUBE_MAP:
			context->bindTextureCubeMap(texture);
			return;
		case GL_TEXTURE_EXTERNAL_OES:
			context->bindTextureExternal(texture);
			return;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY glBlendColor(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha)
{
	TRACE("(GLclampf red = %f, GLclampf green = %f, GLclampf blue = %f, GLclampf alpha = %f)",
		red, green, blue, alpha);

	gl::Context* context = gl::getContext();

	if(context)
	{
		context->setBlendColor(gl::clamp01(red), gl::clamp01(green), gl::clamp01(blue), gl::clamp01(alpha));
	}
}

void GL_APIENTRY glBlendEquation(GLenum mode)
{
	glBlendEquationSeparate(mode, mode);
}

void GL_APIENTRY glBlendEquationSeparate(GLenum modeRGB, GLenum modeAlpha)
{
	TRACE("(GLenum modeRGB = 0x%X, GLenum modeAlpha = 0x%X)", modeRGB, modeAlpha);

	switch(modeRGB)
	{
	case GL_FUNC_ADD:
	case GL_FUNC_SUBTRACT:
	case GL_FUNC_REVERSE_SUBTRACT:
	case GL_MIN_EXT:
	case GL_MAX_EXT:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	switch(modeAlpha)
	{
	case GL_FUNC_ADD:
	case GL_FUNC_SUBTRACT:
	case GL_FUNC_REVERSE_SUBTRACT:
	case GL_MIN_EXT:
	case GL_MAX_EXT:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->setBlendEquation(modeRGB, modeAlpha);
	}
}

void GL_APIENTRY glBlendFunc(GLenum sfactor, GLenum dfactor)
{
	glBlendFuncSeparate(sfactor, dfactor, sfactor, dfactor);
}

void GL_APIENTRY glBlendFuncSeparate(GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha)
{
	TRACE("(GLenum srcRGB = 0x%X, GLenum dstRGB = 0x%X, GLenum srcAlpha = 0x%X, GLenum dstAlpha = 0x%X)",
	      srcRGB, dstRGB, srcAlpha, dstAlpha);

	switch(srcRGB)
	{
	case GL_ZERO:
	case GL_ONE:
	case GL_SRC_COLOR:
	case GL_ONE_MINUS_SRC_COLOR:
	case GL_DST_COLOR:
	case GL_ONE_MINUS_DST_COLOR:
	case GL_SRC_ALPHA:
	case GL_ONE_MINUS_SRC_ALPHA:
	case GL_DST_ALPHA:
	case GL_ONE_MINUS_DST_ALPHA:
	case GL_CONSTANT_COLOR:
	case GL_ONE_MINUS_CONSTANT_COLOR:
	case GL_CONSTANT_ALPHA:
	case GL_ONE_MINUS_CONSTANT_ALPHA:
	case GL_SRC_ALPHA_SATURATE:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	switch(dstRGB)
	{
	case GL_ZERO:
	case GL_ONE:
	case GL_SRC_COLOR:
	case GL_ONE_MINUS_SRC_COLOR:
	case GL_DST_COLOR:
	case GL_ONE_MINUS_DST_COLOR:
	case GL_SRC_ALPHA:
	case GL_ONE_MINUS_SRC_ALPHA:
	case GL_DST_ALPHA:
	case GL_ONE_MINUS_DST_ALPHA:
	case GL_CONSTANT_COLOR:
	case GL_ONE_MINUS_CONSTANT_COLOR:
	case GL_CONSTANT_ALPHA:
	case GL_ONE_MINUS_CONSTANT_ALPHA:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	switch(srcAlpha)
	{
	case GL_ZERO:
	case GL_ONE:
	case GL_SRC_COLOR:
	case GL_ONE_MINUS_SRC_COLOR:
	case GL_DST_COLOR:
	case GL_ONE_MINUS_DST_COLOR:
	case GL_SRC_ALPHA:
	case GL_ONE_MINUS_SRC_ALPHA:
	case GL_DST_ALPHA:
	case GL_ONE_MINUS_DST_ALPHA:
	case GL_CONSTANT_COLOR:
	case GL_ONE_MINUS_CONSTANT_COLOR:
	case GL_CONSTANT_ALPHA:
	case GL_ONE_MINUS_CONSTANT_ALPHA:
	case GL_SRC_ALPHA_SATURATE:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	switch(dstAlpha)
	{
	case GL_ZERO:
	case GL_ONE:
	case GL_SRC_COLOR:
	case GL_ONE_MINUS_SRC_COLOR:
	case GL_DST_COLOR:
	case GL_ONE_MINUS_DST_COLOR:
	case GL_SRC_ALPHA:
	case GL_ONE_MINUS_SRC_ALPHA:
	case GL_DST_ALPHA:
	case GL_ONE_MINUS_DST_ALPHA:
	case GL_CONSTANT_COLOR:
	case GL_ONE_MINUS_CONSTANT_COLOR:
	case GL_CONSTANT_ALPHA:
	case GL_ONE_MINUS_CONSTANT_ALPHA:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->setBlendFactors(srcRGB, dstRGB, srcAlpha, dstAlpha);
	}
}

void GL_APIENTRY glBufferData(GLenum target, GLsizeiptr size, const GLvoid* data, GLenum usage)
{
	size = static_cast<GLint>(size);   // Work around issues with some 64-bit applications

	TRACE("(GLenum target = 0x%X, GLsizeiptr size = %d, const GLvoid* data = 0x%0.8p, GLenum usage = %d)",
	      target, size, data, usage);

	if(size < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	switch(usage)
	{
	case GL_STREAM_DRAW:
	case GL_STATIC_DRAW:
	case GL_DYNAMIC_DRAW:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Buffer *buffer;

		switch(target)
		{
		case GL_ARRAY_BUFFER:
			buffer = context->getArrayBuffer();
			break;
		case GL_ELEMENT_ARRAY_BUFFER:
			buffer = context->getElementArrayBuffer();
			break;
		default:
			return error(GL_INVALID_ENUM);
		}

		if(!buffer)
		{
			return error(GL_INVALID_OPERATION);
		}

		buffer->bufferData(data, size, usage);
	}
}

void GL_APIENTRY glBufferSubData(GLenum target, GLintptr offset, GLsizeiptr size, const GLvoid* data)
{
	size = static_cast<GLint>(size);   // Work around issues with some 64-bit applications
	offset = static_cast<GLint>(offset);

	TRACE("(GLenum target = 0x%X, GLintptr offset = %d, GLsizeiptr size = %d, const GLvoid* data = 0x%0.8p)",
	      target, offset, size, data);

	if(size < 0 || offset < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	if(data == NULL)
	{
		return;
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Buffer *buffer;

		switch(target)
		{
		case GL_ARRAY_BUFFER:
			buffer = context->getArrayBuffer();
			break;
		case GL_ELEMENT_ARRAY_BUFFER:
			buffer = context->getElementArrayBuffer();
			break;
		default:
			return error(GL_INVALID_ENUM);
		}

		if(!buffer)
		{
			return error(GL_INVALID_OPERATION);
		}

		if((size_t)size + offset > buffer->size())
		{
			return error(GL_INVALID_VALUE);
		}

		buffer->bufferSubData(data, size, offset);
	}
}

GLenum GL_APIENTRY glCheckFramebufferStatus(GLenum target)
{
	TRACE("(GLenum target = 0x%X)", target);

	if(target != GL_FRAMEBUFFER && target != GL_DRAW_FRAMEBUFFER_ANGLE && target != GL_READ_FRAMEBUFFER_ANGLE)
	{
		return error(GL_INVALID_ENUM, 0);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Framebuffer *framebuffer = NULL;
		if(target == GL_READ_FRAMEBUFFER_ANGLE)
		{
			framebuffer = context->getReadFramebuffer();
		}
		else
		{
			framebuffer = context->getDrawFramebuffer();
		}

		return framebuffer->completeness();
	}

	return 0;
}

void GL_APIENTRY glClear(GLbitfield mask)
{
	TRACE("(GLbitfield mask = %X)", mask);

	if((mask & ~(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT)) != 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->clear(mask);
	}
}

void GL_APIENTRY glClearColor(GLclampf red, GLclampf green, GLclampf blue, GLclampf alpha)
{
	TRACE("(GLclampf red = %f, GLclampf green = %f, GLclampf blue = %f, GLclampf alpha = %f)",
	      red, green, blue, alpha);

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->setClearColor(red, green, blue, alpha);
	}
}

void GL_APIENTRY glClearDepthf(GLclampf depth)
{
	TRACE("(GLclampf depth = %f)", depth);

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->setClearDepth(depth);
	}
}

void GL_APIENTRY glClearStencil(GLint s)
{
	TRACE("(GLint s = %d)", s);

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->setClearStencil(s);
	}
}

void GL_APIENTRY glColorMask(GLboolean red, GLboolean green, GLboolean blue, GLboolean alpha)
{
	TRACE("(GLboolean red = %d, GLboolean green = %d, GLboolean blue = %d, GLboolean alpha = %d)",
	      red, green, blue, alpha);

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->setColorMask(red == GL_TRUE, green == GL_TRUE, blue == GL_TRUE, alpha == GL_TRUE);
	}
}

void GL_APIENTRY glCompileShader(GLuint shader)
{
	TRACE("(GLuint shader = %d)", shader);

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Shader *shaderObject = context->getShader(shader);

		if(!shaderObject)
		{
			if(context->getProgram(shader))
			{
				return error(GL_INVALID_OPERATION);
			}
			else
			{
				return error(GL_INVALID_VALUE);
			}
		}

		shaderObject->compile();
	}
}

void GL_APIENTRY glCompressedTexImage2D(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height,
                                        GLint border, GLsizei imageSize, const GLvoid* data)
{
	TRACE("(GLenum target = 0x%X, GLint level = %d, GLenum internalformat = 0x%X, GLsizei width = %d, "
	      "GLsizei height = %d, GLint border = %d, GLsizei imageSize = %d, const GLvoid* data = 0x%0.8p)",
	      target, level, internalformat, width, height, border, imageSize, data);

	if(!validImageSize(level, width, height) || border != 0 || imageSize < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	switch(internalformat)
	{
	case GL_ETC1_RGB8_OES:
		break;
	case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
	case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
	case GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE:
	case GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE:
		if(!S3TC_SUPPORT)
		{
			return error(GL_INVALID_ENUM);
		}
		break;
	case GL_DEPTH_COMPONENT:
	case GL_DEPTH_COMPONENT16:
	case GL_DEPTH_COMPONENT32_OES:
	case GL_DEPTH_STENCIL_OES:
	case GL_DEPTH24_STENCIL8_OES:
		return error(GL_INVALID_OPERATION);
	default:
		return error(GL_INVALID_ENUM);
	}

	if(border != 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(level > gl::IMPLEMENTATION_MAX_TEXTURE_LEVELS)
		{
			return error(GL_INVALID_VALUE);
		}

		switch(target)
		{
		case GL_TEXTURE_2D:
			if(width > (gl::IMPLEMENTATION_MAX_TEXTURE_SIZE >> level) ||
			   height > (gl::IMPLEMENTATION_MAX_TEXTURE_SIZE >> level))
			{
				return error(GL_INVALID_VALUE);
			}
			break;
		case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
		case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
		case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
		case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
		case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
		case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
			if(width != height)
			{
				return error(GL_INVALID_VALUE);
			}

			if(width > (gl::IMPLEMENTATION_MAX_CUBE_MAP_TEXTURE_SIZE >> level) ||
			   height > (gl::IMPLEMENTATION_MAX_CUBE_MAP_TEXTURE_SIZE >> level))
			{
				return error(GL_INVALID_VALUE);
			}
			break;
		default:
			return error(GL_INVALID_ENUM);
		}

		if(imageSize != gl::ComputeCompressedSize(width, height, internalformat))
		{
			return error(GL_INVALID_VALUE);
		}

		if(target == GL_TEXTURE_2D)
		{
			gl::Texture2D *texture = context->getTexture2D();

			if(!texture)
			{
				return error(GL_INVALID_OPERATION);
			}

			texture->setCompressedImage(level, internalformat, width, height, imageSize, data);
		}
		else
		{
			gl::TextureCubeMap *texture = context->getTextureCubeMap();

			if(!texture)
			{
				return error(GL_INVALID_OPERATION);
			}

			switch(target)
			{
			case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
			case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
			case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
			case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
			case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
			case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
				texture->setCompressedImage(target, level, internalformat, width, height, imageSize, data);
				break;
			default: UNREACHABLE();
			}
		}
	}
}

void GL_APIENTRY glCompressedTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                           GLenum format, GLsizei imageSize, const GLvoid* data)
{
	TRACE("(GLenum target = 0x%X, GLint level = %d, GLint xoffset = %d, GLint yoffset = %d, "
	      "GLsizei width = %d, GLsizei height = %d, GLenum format = 0x%X, "
	      "GLsizei imageSize = %d, const GLvoid* data = 0x%0.8p)",
	      target, level, xoffset, yoffset, width, height, format, imageSize, data);

	if(!gl::IsTextureTarget(target))
	{
		return error(GL_INVALID_ENUM);
	}

	if(xoffset < 0 || yoffset < 0 || !validImageSize(level, width, height) || imageSize < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	switch(format)
	{
	case GL_ETC1_RGB8_OES:
		break;
	case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
	case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
	case GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE:
	case GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE:
		if(!S3TC_SUPPORT)
		{
			return error(GL_INVALID_ENUM);
		}
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	if(width == 0 || height == 0 || data == NULL)
	{
		return;
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(level > gl::IMPLEMENTATION_MAX_TEXTURE_LEVELS)
		{
			return error(GL_INVALID_VALUE);
		}

		if(imageSize != gl::ComputeCompressedSize(width, height, format))
		{
			return error(GL_INVALID_VALUE);
		}

		if(xoffset % 4 != 0 || yoffset % 4 != 0)
		{
			// We wait to check the offsets until this point, because the multiple-of-four restriction does not exist unless DXT1 textures are supported
			return error(GL_INVALID_OPERATION);
		}

		if(target == GL_TEXTURE_2D)
		{
			gl::Texture2D *texture = context->getTexture2D();

			if(validateSubImageParams(true, width, height, xoffset, yoffset, target, level, format, texture))
			{
				texture->subImageCompressed(level, xoffset, yoffset, width, height, format, imageSize, data);
			}
		}
		else if(gl::IsCubemapTextureTarget(target))
		{
			gl::TextureCubeMap *texture = context->getTextureCubeMap();

			if(validateSubImageParams(true, width, height, xoffset, yoffset, target, level, format, texture))
			{
				texture->subImageCompressed(target, level, xoffset, yoffset, width, height, format, imageSize, data);
			}
		}
		else
		{
			UNREACHABLE();
		}
	}
}

void GL_APIENTRY glCopyTexImage2D(GLenum target, GLint level, GLenum internalformat, GLint x, GLint y, GLsizei width, GLsizei height, GLint border)
{
	TRACE("(GLenum target = 0x%X, GLint level = %d, GLenum internalformat = 0x%X, "
	      "GLint x = %d, GLint y = %d, GLsizei width = %d, GLsizei height = %d, GLint border = %d)",
	      target, level, internalformat, x, y, width, height, border);

	if(!validImageSize(level, width, height))
	{
		return error(GL_INVALID_VALUE);
	}

	if(border != 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		switch(target)
		{
		case GL_TEXTURE_2D:
			if(width > (gl::IMPLEMENTATION_MAX_TEXTURE_SIZE >> level) ||
			   height > (gl::IMPLEMENTATION_MAX_TEXTURE_SIZE >> level))
			{
				return error(GL_INVALID_VALUE);
			}
			break;
		case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
		case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
		case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
		case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
		case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
		case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
			if(width != height)
			{
				return error(GL_INVALID_VALUE);
			}

			if(width > (gl::IMPLEMENTATION_MAX_CUBE_MAP_TEXTURE_SIZE >> level) ||
			   height > (gl::IMPLEMENTATION_MAX_CUBE_MAP_TEXTURE_SIZE >> level))
			{
				return error(GL_INVALID_VALUE);
			}
			break;
		default:
			return error(GL_INVALID_ENUM);
		}

		gl::Framebuffer *framebuffer = context->getReadFramebuffer();

		if(framebuffer->completeness() != GL_FRAMEBUFFER_COMPLETE)
		{
			return error(GL_INVALID_FRAMEBUFFER_OPERATION);
		}

		if(context->getReadFramebufferName() != 0 && framebuffer->getColorbuffer()->getSamples() > 1)
		{
			return error(GL_INVALID_OPERATION);
		}

		gl::Renderbuffer *source = framebuffer->getColorbuffer();
		GLenum colorbufferFormat = source->getFormat();

		// [OpenGL ES 2.0.24] table 3.9
		switch(internalformat)
		{
		case GL_ALPHA:
			if(colorbufferFormat != GL_ALPHA &&
			   colorbufferFormat != GL_RGBA &&
			   colorbufferFormat != GL_RGBA4 &&
			   colorbufferFormat != GL_RGB5_A1 &&
			   colorbufferFormat != GL_RGBA8_OES)
			{
				return error(GL_INVALID_OPERATION);
			}
			break;
		case GL_LUMINANCE:
		case GL_RGB:
			if(colorbufferFormat != GL_RGB &&
			   colorbufferFormat != GL_RGB565 &&
			   colorbufferFormat != GL_RGB8_OES &&
			   colorbufferFormat != GL_RGBA &&
			   colorbufferFormat != GL_RGBA4 &&
			   colorbufferFormat != GL_RGB5_A1 &&
			   colorbufferFormat != GL_RGBA8_OES)
			{
				return error(GL_INVALID_OPERATION);
			}
			break;
		case GL_LUMINANCE_ALPHA:
		case GL_RGBA:
			if(colorbufferFormat != GL_RGBA &&
			   colorbufferFormat != GL_RGBA4 &&
			   colorbufferFormat != GL_RGB5_A1 &&
			   colorbufferFormat != GL_RGBA8_OES)
			{
				return error(GL_INVALID_OPERATION);
			}
			break;
		case GL_ETC1_RGB8_OES:
			return error(GL_INVALID_OPERATION);
		case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
		case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
		case GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE:
		case GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE:
			if(S3TC_SUPPORT)
			{
				return error(GL_INVALID_OPERATION);
			}
			else
			{
				return error(GL_INVALID_ENUM);
			}
		default:
			return error(GL_INVALID_ENUM);
		}

		if(target == GL_TEXTURE_2D)
		{
			gl::Texture2D *texture = context->getTexture2D();

			if(!texture)
			{
				return error(GL_INVALID_OPERATION);
			}

			texture->copyImage(level, internalformat, x, y, width, height, framebuffer);
		}
		else if(gl::IsCubemapTextureTarget(target))
		{
			gl::TextureCubeMap *texture = context->getTextureCubeMap();

			if(!texture)
			{
				return error(GL_INVALID_OPERATION);
			}

			texture->copyImage(target, level, internalformat, x, y, width, height, framebuffer);
		}
		else UNREACHABLE();
	}
}

void GL_APIENTRY glCopyTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLint x, GLint y, GLsizei width, GLsizei height)
{
	TRACE("(GLenum target = 0x%X, GLint level = %d, GLint xoffset = %d, GLint yoffset = %d, "
	      "GLint x = %d, GLint y = %d, GLsizei width = %d, GLsizei height = %d)",
	      target, level, xoffset, yoffset, x, y, width, height);

	if(!gl::IsTextureTarget(target))
	{
		return error(GL_INVALID_ENUM);
	}

	if(level < 0 || xoffset < 0 || yoffset < 0 || width < 0 || height < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	if(std::numeric_limits<GLsizei>::max() - xoffset < width || std::numeric_limits<GLsizei>::max() - yoffset < height)
	{
		return error(GL_INVALID_VALUE);
	}

	if(width == 0 || height == 0)
	{
		return;
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(level > gl::IMPLEMENTATION_MAX_TEXTURE_LEVELS)
		{
			return error(GL_INVALID_VALUE);
		}

		gl::Framebuffer *framebuffer = context->getReadFramebuffer();

		if(framebuffer->completeness() != GL_FRAMEBUFFER_COMPLETE)
		{
			return error(GL_INVALID_FRAMEBUFFER_OPERATION);
		}

		if(context->getReadFramebufferName() != 0 && framebuffer->getColorbuffer()->getSamples() > 1)
		{
			return error(GL_INVALID_OPERATION);
		}

		gl::Renderbuffer *source = framebuffer->getColorbuffer();
		GLenum colorbufferFormat = source->getFormat();
		gl::Texture *texture = NULL;

		if(target == GL_TEXTURE_2D)
		{
			texture = context->getTexture2D();
		}
		else if(gl::IsCubemapTextureTarget(target))
		{
			texture = context->getTextureCubeMap();
		}
		else UNREACHABLE();

		if(!validateSubImageParams(false, width, height, xoffset, yoffset, target, level, GL_NONE, texture))
		{
			return;
		}

		GLenum textureFormat = texture->getFormat(target, level);

		// [OpenGL ES 2.0.24] table 3.9
		switch(textureFormat)
		{
		case GL_ALPHA:
			if(colorbufferFormat != GL_ALPHA &&
			   colorbufferFormat != GL_RGBA &&
			   colorbufferFormat != GL_RGBA4 &&
			   colorbufferFormat != GL_RGB5_A1 &&
			   colorbufferFormat != GL_RGBA8_OES)
			{
				return error(GL_INVALID_OPERATION);
			}
			break;
		case GL_LUMINANCE:
		case GL_RGB:
			if(colorbufferFormat != GL_RGB &&
			   colorbufferFormat != GL_RGB565 &&
			   colorbufferFormat != GL_RGB8_OES &&
			   colorbufferFormat != GL_RGBA &&
			   colorbufferFormat != GL_RGBA4 &&
			   colorbufferFormat != GL_RGB5_A1 &&
			   colorbufferFormat != GL_RGBA8_OES)
			{
				return error(GL_INVALID_OPERATION);
			}
			break;
		case GL_LUMINANCE_ALPHA:
		case GL_RGBA:
			if(colorbufferFormat != GL_RGBA &&
			   colorbufferFormat != GL_RGBA4 &&
			   colorbufferFormat != GL_RGB5_A1 &&
			   colorbufferFormat != GL_RGBA8_OES)
			{
				return error(GL_INVALID_OPERATION);
			}
			break;
		case GL_ETC1_RGB8_OES:
			return error(GL_INVALID_OPERATION);
		case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
		case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
		case GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE:
		case GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE:
			if(S3TC_SUPPORT)
			{
				return error(GL_INVALID_OPERATION);
			}
			else
			{
				return error(GL_INVALID_ENUM);
			}
		case GL_DEPTH_COMPONENT:
		case GL_DEPTH_STENCIL_OES:
			return error(GL_INVALID_OPERATION);
		default:
			return error(GL_INVALID_ENUM);
		}

		texture->copySubImage(target, level, xoffset, yoffset, x, y, width, height, framebuffer);
	}
}

GLuint GL_APIENTRY glCreateProgram(void)
{
	TRACE("()");

	gl::Context *context = gl::getContext();

	if(context)
	{
		return context->createProgram();
	}

	return 0;
}

GLuint GL_APIENTRY glCreateShader(GLenum type)
{
	TRACE("(GLenum type = 0x%X)", type);

	gl::Context *context = gl::getContext();

	if(context)
	{
		switch(type)
		{
		case GL_FRAGMENT_SHADER:
		case GL_VERTEX_SHADER:
			return context->createShader(type);
		default:
			return error(GL_INVALID_ENUM, 0);
		}
	}

	return 0;
}

void GL_APIENTRY glCullFace(GLenum mode)
{
	TRACE("(GLenum mode = 0x%X)", mode);

	switch(mode)
	{
	case GL_FRONT:
	case GL_BACK:
	case GL_FRONT_AND_BACK:
		{
			gl::Context *context = gl::getContext();

			if(context)
			{
				context->setCullMode(mode);
			}
		}
		break;
	default:
		return error(GL_INVALID_ENUM);
	}
}

void GL_APIENTRY glDeleteBuffers(GLsizei n, const GLuint* buffers)
{
	TRACE("(GLsizei n = %d, const GLuint* buffers = 0x%0.8p)", n, buffers);

	if(n < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		for(int i = 0; i < n; i++)
		{
			context->deleteBuffer(buffers[i]);
		}
	}
}

void GL_APIENTRY glDeleteFencesNV(GLsizei n, const GLuint* fences)
{
	TRACE("(GLsizei n = %d, const GLuint* fences = 0x%0.8p)", n, fences);

	if(n < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		for(int i = 0; i < n; i++)
		{
			context->deleteFence(fences[i]);
		}
	}
}

void GL_APIENTRY glDeleteFramebuffers(GLsizei n, const GLuint* framebuffers)
{
	TRACE("(GLsizei n = %d, const GLuint* framebuffers = 0x%0.8p)", n, framebuffers);

	if(n < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		for(int i = 0; i < n; i++)
		{
			if(framebuffers[i] != 0)
			{
				context->deleteFramebuffer(framebuffers[i]);
			}
		}
	}
}

void GL_APIENTRY glDeleteProgram(GLuint program)
{
	TRACE("(GLuint program = %d)", program);

	if(program == 0)
	{
		return;
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(!context->getProgram(program))
		{
			if(context->getShader(program))
			{
				return error(GL_INVALID_OPERATION);
			}
			else
			{
				return error(GL_INVALID_VALUE);
			}
		}

		context->deleteProgram(program);
	}
}

void GL_APIENTRY glDeleteQueriesEXT(GLsizei n, const GLuint *ids)
{
	TRACE("(GLsizei n = %d, const GLuint *ids = 0x%0.8p)", n, ids);

	if(n < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		for(int i = 0; i < n; i++)
		{
			context->deleteQuery(ids[i]);
		}
	}
}

void GL_APIENTRY glDeleteRenderbuffers(GLsizei n, const GLuint* renderbuffers)
{
	TRACE("(GLsizei n = %d, const GLuint* renderbuffers = 0x%0.8p)", n, renderbuffers);

	if(n < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		for(int i = 0; i < n; i++)
		{
			context->deleteRenderbuffer(renderbuffers[i]);
		}
	}
}

void GL_APIENTRY glDeleteShader(GLuint shader)
{
	TRACE("(GLuint shader = %d)", shader);

	if(shader == 0)
	{
		return;
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(!context->getShader(shader))
		{
			if(context->getProgram(shader))
			{
				return error(GL_INVALID_OPERATION);
			}
			else
			{
				return error(GL_INVALID_VALUE);
			}
		}

		context->deleteShader(shader);
	}
}

void GL_APIENTRY glDeleteTextures(GLsizei n, const GLuint* textures)
{
	TRACE("(GLsizei n = %d, const GLuint* textures = 0x%0.8p)", n, textures);

	if(n < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		for(int i = 0; i < n; i++)
		{
			if(textures[i] != 0)
			{
				context->deleteTexture(textures[i]);
			}
		}
	}
}

void GL_APIENTRY glDepthFunc(GLenum func)
{
	TRACE("(GLenum func = 0x%X)", func);

	switch(func)
	{
	case GL_NEVER:
	case GL_ALWAYS:
	case GL_LESS:
	case GL_LEQUAL:
	case GL_EQUAL:
	case GL_GREATER:
	case GL_GEQUAL:
	case GL_NOTEQUAL:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->setDepthFunc(func);
	}
}

void GL_APIENTRY glDepthMask(GLboolean flag)
{
	TRACE("(GLboolean flag = %d)", flag);

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->setDepthMask(flag != GL_FALSE);
	}
}

void GL_APIENTRY glDepthRangef(GLclampf zNear, GLclampf zFar)
{
	TRACE("(GLclampf zNear = %f, GLclampf zFar = %f)", zNear, zFar);

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->setDepthRange(zNear, zFar);
	}
}

void GL_APIENTRY glDetachShader(GLuint program, GLuint shader)
{
	TRACE("(GLuint program = %d, GLuint shader = %d)", program, shader);

	gl::Context *context = gl::getContext();

	if(context)
	{

		gl::Program *programObject = context->getProgram(program);
		gl::Shader *shaderObject = context->getShader(shader);

		if(!programObject)
		{
			gl::Shader *shaderByProgramHandle;
			shaderByProgramHandle = context->getShader(program);
			if(!shaderByProgramHandle)
			{
				return error(GL_INVALID_VALUE);
			}
			else
			{
				return error(GL_INVALID_OPERATION);
			}
		}

		if(!shaderObject)
		{
			gl::Program *programByShaderHandle = context->getProgram(shader);
			if(!programByShaderHandle)
			{
				return error(GL_INVALID_VALUE);
			}
			else
			{
				return error(GL_INVALID_OPERATION);
			}
		}

		if(!programObject->detachShader(shaderObject))
		{
			return error(GL_INVALID_OPERATION);
		}
	}
}

void GL_APIENTRY glDisable(GLenum cap)
{
	TRACE("(GLenum cap = 0x%X)", cap);

	gl::Context *context = gl::getContext();

	if(context)
	{
		switch(cap)
		{
		case GL_CULL_FACE:                context->setCullFace(false);              break;
		case GL_POLYGON_OFFSET_FILL:      context->setPolygonOffsetFill(false);     break;
		case GL_SAMPLE_ALPHA_TO_COVERAGE: context->setSampleAlphaToCoverage(false); break;
		case GL_SAMPLE_COVERAGE:          context->setSampleCoverage(false);        break;
		case GL_SCISSOR_TEST:             context->setScissorTest(false);           break;
		case GL_STENCIL_TEST:             context->setStencilTest(false);           break;
		case GL_DEPTH_TEST:               context->setDepthTest(false);             break;
		case GL_BLEND:                    context->setBlend(false);                 break;
		case GL_DITHER:                   context->setDither(false);                break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY glDisableVertexAttribArray(GLuint index)
{
	TRACE("(GLuint index = %d)", index);

	if(index >= gl::MAX_VERTEX_ATTRIBS)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->setEnableVertexAttribArray(index, false);
	}
}

void GL_APIENTRY glDrawArrays(GLenum mode, GLint first, GLsizei count)
{
	TRACE("(GLenum mode = 0x%X, GLint first = %d, GLsizei count = %d)", mode, first, count);

	if(count < 0 || first < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->drawArrays(mode, first, count);
	}
}

void GL_APIENTRY glDrawElements(GLenum mode, GLsizei count, GLenum type, const GLvoid* indices)
{
	TRACE("(GLenum mode = 0x%X, GLsizei count = %d, GLenum type = 0x%X, const GLvoid* indices = 0x%0.8p)",
	      mode, count, type, indices);

	if(count < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		switch(type)
		{
		case GL_UNSIGNED_BYTE:
		case GL_UNSIGNED_SHORT:
		case GL_UNSIGNED_INT:
			break;
		default:
			return error(GL_INVALID_ENUM);
		}

		context->drawElements(mode, count, type, indices);
	}
}

void GL_APIENTRY glEnable(GLenum cap)
{
	TRACE("(GLenum cap = 0x%X)", cap);

	gl::Context *context = gl::getContext();

	if(context)
	{
		switch(cap)
		{
		case GL_CULL_FACE:                context->setCullFace(true);              break;
		case GL_POLYGON_OFFSET_FILL:      context->setPolygonOffsetFill(true);     break;
		case GL_SAMPLE_ALPHA_TO_COVERAGE: context->setSampleAlphaToCoverage(true); break;
		case GL_SAMPLE_COVERAGE:          context->setSampleCoverage(true);        break;
		case GL_SCISSOR_TEST:             context->setScissorTest(true);           break;
		case GL_STENCIL_TEST:             context->setStencilTest(true);           break;
		case GL_DEPTH_TEST:               context->setDepthTest(true);             break;
		case GL_BLEND:                    context->setBlend(true);                 break;
		case GL_DITHER:                   context->setDither(true);                break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY glEnableVertexAttribArray(GLuint index)
{
	TRACE("(GLuint index = %d)", index);

	if(index >= gl::MAX_VERTEX_ATTRIBS)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->setEnableVertexAttribArray(index, true);
	}
}

void GL_APIENTRY glEndQueryEXT(GLenum target)
{
	TRACE("GLenum target = 0x%X)", target);

	switch(target)
	{
	case GL_ANY_SAMPLES_PASSED_EXT:
	case GL_ANY_SAMPLES_PASSED_CONSERVATIVE_EXT:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->endQuery(target);
	}
}

void GL_APIENTRY glFinishFenceNV(GLuint fence)
{
	TRACE("(GLuint fence = %d)", fence);

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Fence* fenceObject = context->getFence(fence);

		if(fenceObject == NULL)
		{
			return error(GL_INVALID_OPERATION);
		}

		fenceObject->finishFence();
	}
}

void GL_APIENTRY glFinish(void)
{
	TRACE("()");

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->finish();
	}
}

void GL_APIENTRY glFlush(void)
{
	TRACE("()");

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->flush();
	}
}

void GL_APIENTRY glFramebufferRenderbuffer(GLenum target, GLenum attachment, GLenum renderbuffertarget, GLuint renderbuffer)
{
	TRACE("(GLenum target = 0x%X, GLenum attachment = 0x%X, GLenum renderbuffertarget = 0x%X, "
	      "GLuint renderbuffer = %d)", target, attachment, renderbuffertarget, renderbuffer);

	if((target != GL_FRAMEBUFFER && target != GL_DRAW_FRAMEBUFFER_ANGLE && target != GL_READ_FRAMEBUFFER_ANGLE) ||
	   (renderbuffertarget != GL_RENDERBUFFER && renderbuffer != 0))
	{
		return error(GL_INVALID_ENUM);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Framebuffer *framebuffer = NULL;
		GLuint framebufferName = 0;
		if(target == GL_READ_FRAMEBUFFER_ANGLE)
		{
			framebuffer = context->getReadFramebuffer();
			framebufferName = context->getReadFramebufferName();
		}
		else
		{
			framebuffer = context->getDrawFramebuffer();
			framebufferName = context->getDrawFramebufferName();
		}

		if(!framebuffer || (framebufferName == 0 && renderbuffer != 0))
		{
			return error(GL_INVALID_OPERATION);
		}

		switch(attachment)
		{
		case GL_COLOR_ATTACHMENT0:
			framebuffer->setColorbuffer(GL_RENDERBUFFER, renderbuffer);
			break;
		case GL_DEPTH_ATTACHMENT:
			framebuffer->setDepthbuffer(GL_RENDERBUFFER, renderbuffer);
			break;
		case GL_STENCIL_ATTACHMENT:
			framebuffer->setStencilbuffer(GL_RENDERBUFFER, renderbuffer);
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY glFramebufferTexture2D(GLenum target, GLenum attachment, GLenum textarget, GLuint texture, GLint level)
{
	TRACE("(GLenum target = 0x%X, GLenum attachment = 0x%X, GLenum textarget = 0x%X, "
	      "GLuint texture = %d, GLint level = %d)", target, attachment, textarget, texture, level);

	if(target != GL_FRAMEBUFFER && target != GL_DRAW_FRAMEBUFFER_ANGLE && target != GL_READ_FRAMEBUFFER_ANGLE)
	{
		return error(GL_INVALID_ENUM);
	}

	switch(attachment)
	{
	case GL_COLOR_ATTACHMENT0:
	case GL_DEPTH_ATTACHMENT:
	case GL_STENCIL_ATTACHMENT:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(texture == 0)
		{
			textarget = GL_NONE;
		}
		else
		{
			gl::Texture *tex = context->getTexture(texture);

			if(tex == NULL)
			{
				return error(GL_INVALID_OPERATION);
			}

			if(tex->isCompressed(textarget, level))
			{
				return error(GL_INVALID_OPERATION);
			}

			switch(textarget)
			{
			case GL_TEXTURE_2D:
				if(tex->getTarget() != GL_TEXTURE_2D)
				{
					return error(GL_INVALID_OPERATION);
				}
				break;
			case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
			case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
			case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
			case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
			case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
			case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
				if(tex->getTarget() != GL_TEXTURE_CUBE_MAP)
				{
					return error(GL_INVALID_OPERATION);
				}
				break;
			default:
				return error(GL_INVALID_ENUM);
			}

			if(level != 0)
			{
				return error(GL_INVALID_VALUE);
			}
		}

		gl::Framebuffer *framebuffer = NULL;
		GLuint framebufferName = 0;
		if(target == GL_READ_FRAMEBUFFER_ANGLE)
		{
			framebuffer = context->getReadFramebuffer();
			framebufferName = context->getReadFramebufferName();
		}
		else
		{
			framebuffer = context->getDrawFramebuffer();
			framebufferName = context->getDrawFramebufferName();
		}

		if(framebufferName == 0 || !framebuffer)
		{
			return error(GL_INVALID_OPERATION);
		}

		switch(attachment)
		{
		case GL_COLOR_ATTACHMENT0:  framebuffer->setColorbuffer(textarget, texture);   break;
		case GL_DEPTH_ATTACHMENT:   framebuffer->setDepthbuffer(textarget, texture);   break;
		case GL_STENCIL_ATTACHMENT: framebuffer->setStencilbuffer(textarget, texture); break;
		}
	}
}

void GL_APIENTRY glFrontFace(GLenum mode)
{
	TRACE("(GLenum mode = 0x%X)", mode);

	switch(mode)
	{
	case GL_CW:
	case GL_CCW:
		{
			gl::Context *context = gl::getContext();

			if(context)
			{
				context->setFrontFace(mode);
			}
		}
		break;
	default:
		return error(GL_INVALID_ENUM);
	}
}

void GL_APIENTRY glGenBuffers(GLsizei n, GLuint* buffers)
{
	TRACE("(GLsizei n = %d, GLuint* buffers = 0x%0.8p)", n, buffers);

	if(n < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		for(int i = 0; i < n; i++)
		{
			buffers[i] = context->createBuffer();
		}
	}
}

void GL_APIENTRY glGenerateMipmap(GLenum target)
{
	TRACE("(GLenum target = 0x%X)", target);

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Texture *texture;

		switch(target)
		{
		case GL_TEXTURE_2D:
			texture = context->getTexture2D();
			break;
		case GL_TEXTURE_CUBE_MAP:
			texture = context->getTextureCubeMap();
			break;
		default:
			return error(GL_INVALID_ENUM);
		}

		if(texture->isCompressed(target, 0) || texture->isDepth(target, 0))
		{
			return error(GL_INVALID_OPERATION);
		}

		texture->generateMipmaps();
	}
}

void GL_APIENTRY glGenFencesNV(GLsizei n, GLuint* fences)
{
	TRACE("(GLsizei n = %d, GLuint* fences = 0x%0.8p)", n, fences);

	if(n < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		for(int i = 0; i < n; i++)
		{
			fences[i] = context->createFence();
		}
	}
}

void GL_APIENTRY glGenFramebuffers(GLsizei n, GLuint* framebuffers)
{
	TRACE("(GLsizei n = %d, GLuint* framebuffers = 0x%0.8p)", n, framebuffers);

	if(n < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		for(int i = 0; i < n; i++)
		{
			framebuffers[i] = context->createFramebuffer();
		}
	}
}

void GL_APIENTRY glGenQueriesEXT(GLsizei n, GLuint* ids)
{
	TRACE("(GLsizei n = %d, GLuint* ids = 0x%0.8p)", n, ids);

	if(n < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		for(int i = 0; i < n; i++)
		{
			ids[i] = context->createQuery();
		}
	}
}

void GL_APIENTRY glGenRenderbuffers(GLsizei n, GLuint* renderbuffers)
{
	TRACE("(GLsizei n = %d, GLuint* renderbuffers = 0x%0.8p)", n, renderbuffers);

	if(n < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		for(int i = 0; i < n; i++)
		{
			renderbuffers[i] = context->createRenderbuffer();
		}
	}
}

void GL_APIENTRY glGenTextures(GLsizei n, GLuint* textures)
{
	TRACE("(GLsizei n = %d, GLuint* textures = 0x%0.8p)", n, textures);

	if(n < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		for(int i = 0; i < n; i++)
		{
			textures[i] = context->createTexture();
		}
	}
}

void GL_APIENTRY glGetActiveAttrib(GLuint program, GLuint index, GLsizei bufsize, GLsizei *length, GLint *size, GLenum *type, GLchar *name)
{
	TRACE("(GLuint program = %d, GLuint index = %d, GLsizei bufsize = %d, GLsizei *length = 0x%0.8p, "
	      "GLint *size = 0x%0.8p, GLenum *type = %0.8p, GLchar *name = %0.8p)",
	      program, index, bufsize, length, size, type, name);

	if(bufsize < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *programObject = context->getProgram(program);

		if(!programObject)
		{
			if(context->getShader(program))
			{
				return error(GL_INVALID_OPERATION);
			}
			else
			{
				return error(GL_INVALID_VALUE);
			}
		}

		if(index >= (GLuint)programObject->getActiveAttributeCount())
		{
			return error(GL_INVALID_VALUE);
		}

		programObject->getActiveAttribute(index, bufsize, length, size, type, name);
	}
}

void GL_APIENTRY glGetActiveUniform(GLuint program, GLuint index, GLsizei bufsize, GLsizei* length, GLint* size, GLenum* type, GLchar* name)
{
	TRACE("(GLuint program = %d, GLuint index = %d, GLsizei bufsize = %d, "
	      "GLsizei* length = 0x%0.8p, GLint* size = 0x%0.8p, GLenum* type = 0x%0.8p, GLchar* name = %s)",
	      program, index, bufsize, length, size, type, name);

	if(bufsize < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *programObject = context->getProgram(program);

		if(!programObject)
		{
			if(context->getShader(program))
			{
				return error(GL_INVALID_OPERATION);
			}
			else
			{
				return error(GL_INVALID_VALUE);
			}
		}

		if(index >= (GLuint)programObject->getActiveUniformCount())
		{
			return error(GL_INVALID_VALUE);
		}

		programObject->getActiveUniform(index, bufsize, length, size, type, name);
	}
}

void GL_APIENTRY glGetAttachedShaders(GLuint program, GLsizei maxcount, GLsizei* count, GLuint* shaders)
{
	TRACE("(GLuint program = %d, GLsizei maxcount = %d, GLsizei* count = 0x%0.8p, GLuint* shaders = 0x%0.8p)",
	      program, maxcount, count, shaders);

	if(maxcount < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *programObject = context->getProgram(program);

		if(!programObject)
		{
			if(context->getShader(program))
			{
				return error(GL_INVALID_OPERATION);
			}
			else
			{
				return error(GL_INVALID_VALUE);
			}
		}

		return programObject->getAttachedShaders(maxcount, count, shaders);
	}
}

int GL_APIENTRY glGetAttribLocation(GLuint program, const GLchar* name)
{
	TRACE("(GLuint program = %d, const GLchar* name = %s)", program, name);

	gl::Context *context = gl::getContext();

	if(context)
	{

		gl::Program *programObject = context->getProgram(program);

		if(!programObject)
		{
			if(context->getShader(program))
			{
				return error(GL_INVALID_OPERATION, -1);
			}
			else
			{
				return error(GL_INVALID_VALUE, -1);
			}
		}

		if(!programObject->isLinked())
		{
			return error(GL_INVALID_OPERATION, -1);
		}

		return programObject->getAttributeLocation(name);
	}

	return -1;
}

void GL_APIENTRY glGetBooleanv(GLenum pname, GLboolean* params)
{
	TRACE("(GLenum pname = 0x%X, GLboolean* params = 0x%0.8p)",  pname, params);

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(!(context->getBooleanv(pname, params)))
		{
			GLenum nativeType;
			unsigned int numParams = 0;
			if(!context->getQueryParameterInfo(pname, &nativeType, &numParams))
				return error(GL_INVALID_ENUM);

			if(numParams == 0)
				return; // it is known that the pname is valid, but there are no parameters to return

			if(nativeType == GL_FLOAT)
			{
				GLfloat *floatParams = NULL;
				floatParams = new GLfloat[numParams];

				context->getFloatv(pname, floatParams);

				for(unsigned int i = 0; i < numParams; ++i)
				{
					if(floatParams[i] == 0.0f)
						params[i] = GL_FALSE;
					else
						params[i] = GL_TRUE;
				}

				delete [] floatParams;
			}
			else if(nativeType == GL_INT)
			{
				GLint *intParams = NULL;
				intParams = new GLint[numParams];

				context->getIntegerv(pname, intParams);

				for(unsigned int i = 0; i < numParams; ++i)
				{
					if(intParams[i] == 0)
						params[i] = GL_FALSE;
					else
						params[i] = GL_TRUE;
				}

				delete [] intParams;
			}
		}
	}
}

void GL_APIENTRY glGetBufferParameteriv(GLenum target, GLenum pname, GLint* params)
{
	TRACE("(GLenum target = 0x%X, GLenum pname = 0x%X, GLint* params = 0x%0.8p)", target, pname, params);

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Buffer *buffer;

		switch(target)
		{
		case GL_ARRAY_BUFFER:
			buffer = context->getArrayBuffer();
			break;
		case GL_ELEMENT_ARRAY_BUFFER:
			buffer = context->getElementArrayBuffer();
			break;
		default:
			return error(GL_INVALID_ENUM);
		}

		if(!buffer)
		{
			// A null buffer means that "0" is bound to the requested buffer target
			return error(GL_INVALID_OPERATION);
		}

		switch(pname)
		{
		case GL_BUFFER_USAGE:
			*params = buffer->usage();
			break;
		case GL_BUFFER_SIZE:
			*params = buffer->size();
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

GLenum GL_APIENTRY glGetError(void)
{
	TRACE("()");

	gl::Context *context = gl::getContext();

	if(context)
	{
		return context->getError();
	}

	return GL_NO_ERROR;
}

void GL_APIENTRY glGetFenceivNV(GLuint fence, GLenum pname, GLint *params)
{
	TRACE("(GLuint fence = %d, GLenum pname = 0x%X, GLint *params = 0x%0.8p)", fence, pname, params);

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Fence *fenceObject = context->getFence(fence);

		if(fenceObject == NULL)
		{
			return error(GL_INVALID_OPERATION);
		}

		fenceObject->getFenceiv(pname, params);
	}
}

void GL_APIENTRY glGetFloatv(GLenum pname, GLfloat* params)
{
	TRACE("(GLenum pname = 0x%X, GLfloat* params = 0x%0.8p)", pname, params);

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(!(context->getFloatv(pname, params)))
		{
			GLenum nativeType;
			unsigned int numParams = 0;
			if(!context->getQueryParameterInfo(pname, &nativeType, &numParams))
				return error(GL_INVALID_ENUM);

			if(numParams == 0)
				return; // it is known that the pname is valid, but that there are no parameters to return.

			if(nativeType == GL_BOOL)
			{
				GLboolean *boolParams = NULL;
				boolParams = new GLboolean[numParams];

				context->getBooleanv(pname, boolParams);

				for(unsigned int i = 0; i < numParams; ++i)
				{
					if(boolParams[i] == GL_FALSE)
						params[i] = 0.0f;
					else
						params[i] = 1.0f;
				}

				delete [] boolParams;
			}
			else if(nativeType == GL_INT)
			{
				GLint *intParams = NULL;
				intParams = new GLint[numParams];

				context->getIntegerv(pname, intParams);

				for(unsigned int i = 0; i < numParams; ++i)
				{
					params[i] = (GLfloat)intParams[i];
				}

				delete [] intParams;
			}
		}
	}
}

void GL_APIENTRY glGetFramebufferAttachmentParameteriv(GLenum target, GLenum attachment, GLenum pname, GLint* params)
{
	TRACE("(GLenum target = 0x%X, GLenum attachment = 0x%X, GLenum pname = 0x%X, GLint* params = 0x%0.8p)",
	      target, attachment, pname, params);

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(target != GL_FRAMEBUFFER && target != GL_DRAW_FRAMEBUFFER_ANGLE && target != GL_READ_FRAMEBUFFER_ANGLE)
		{
			return error(GL_INVALID_ENUM);
		}

		gl::Framebuffer *framebuffer = NULL;
		if(target == GL_READ_FRAMEBUFFER_ANGLE)
		{
			if(context->getReadFramebufferName() == 0)
			{
				return error(GL_INVALID_OPERATION);
			}

			framebuffer = context->getReadFramebuffer();
		}
		else
		{
			if(context->getDrawFramebufferName() == 0)
			{
				return error(GL_INVALID_OPERATION);
			}

			framebuffer = context->getDrawFramebuffer();
		}

		GLenum attachmentType;
		GLuint attachmentHandle;
		switch(attachment)
		{
		case GL_COLOR_ATTACHMENT0:
			attachmentType = framebuffer->getColorbufferType();
			attachmentHandle = framebuffer->getColorbufferName();
			break;
		case GL_DEPTH_ATTACHMENT:
			attachmentType = framebuffer->getDepthbufferType();
			attachmentHandle = framebuffer->getDepthbufferName();
			break;
		case GL_STENCIL_ATTACHMENT:
			attachmentType = framebuffer->getStencilbufferType();
			attachmentHandle = framebuffer->getStencilbufferName();
			break;
		default:
			return error(GL_INVALID_ENUM);
		}

		GLenum attachmentObjectType;   // Type category
		if(attachmentType == GL_NONE || attachmentType == GL_RENDERBUFFER)
		{
			attachmentObjectType = attachmentType;
		}
		else if(gl::IsTextureTarget(attachmentType))
		{
			attachmentObjectType = GL_TEXTURE;
		}
		else UNREACHABLE();

		switch(pname)
		{
		case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE:
			*params = attachmentObjectType;
			break;
		case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME:
			if(attachmentObjectType == GL_RENDERBUFFER || attachmentObjectType == GL_TEXTURE)
			{
				*params = attachmentHandle;
			}
			else
			{
				return error(GL_INVALID_ENUM);
			}
			break;
		case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL:
			if(attachmentObjectType == GL_TEXTURE)
			{
				*params = 0; // FramebufferTexture2D will not allow level to be set to anything else in GL ES 2.0
			}
			else
			{
				return error(GL_INVALID_ENUM);
			}
			break;
		case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE:
			if(attachmentObjectType == GL_TEXTURE)
			{
				if(gl::IsCubemapTextureTarget(attachmentType))
				{
					*params = attachmentType;
				}
				else
				{
					*params = 0;
				}
			}
			else
			{
				return error(GL_INVALID_ENUM);
			}
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

GLenum GL_APIENTRY glGetGraphicsResetStatusEXT(void)
{
	TRACE("()");

	return GL_NO_ERROR;
}

void GL_APIENTRY glGetIntegerv(GLenum pname, GLint* params)
{
	TRACE("(GLenum pname = 0x%X, GLint* params = 0x%0.8p)", pname, params);

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(!(context->getIntegerv(pname, params)))
		{
			GLenum nativeType;
			unsigned int numParams = 0;
			if(!context->getQueryParameterInfo(pname, &nativeType, &numParams))
				return error(GL_INVALID_ENUM);

			if(numParams == 0)
				return; // it is known that pname is valid, but there are no parameters to return

			if(nativeType == GL_BOOL)
			{
				GLboolean *boolParams = NULL;
				boolParams = new GLboolean[numParams];

				context->getBooleanv(pname, boolParams);

				for(unsigned int i = 0; i < numParams; ++i)
				{
					if(boolParams[i] == GL_FALSE)
						params[i] = 0;
					else
						params[i] = 1;
				}

				delete [] boolParams;
			}
			else if(nativeType == GL_FLOAT)
			{
				GLfloat *floatParams = NULL;
				floatParams = new GLfloat[numParams];

				context->getFloatv(pname, floatParams);

				for(unsigned int i = 0; i < numParams; ++i)
				{
					if(pname == GL_DEPTH_RANGE || pname == GL_COLOR_CLEAR_VALUE || pname == GL_DEPTH_CLEAR_VALUE || pname == GL_BLEND_COLOR)
					{
						params[i] = (GLint)(((GLfloat)(0xFFFFFFFF) * floatParams[i] - 1.0f) / 2.0f);
					}
					else
					{
						params[i] = (GLint)(floatParams[i] > 0.0f ? floor(floatParams[i] + 0.5) : ceil(floatParams[i] - 0.5));
					}
				}

				delete [] floatParams;
			}
		}
	}
}

void GL_APIENTRY glGetProgramiv(GLuint program, GLenum pname, GLint* params)
{
	TRACE("(GLuint program = %d, GLenum pname = 0x%X, GLint* params = 0x%0.8p)", program, pname, params);

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *programObject = context->getProgram(program);

		if(!programObject)
		{
			return error(GL_INVALID_VALUE);
		}

		switch(pname)
		{
		case GL_DELETE_STATUS:
			*params = programObject->isFlaggedForDeletion();
			return;
		case GL_LINK_STATUS:
			*params = programObject->isLinked();
			return;
		case GL_VALIDATE_STATUS:
			*params = programObject->isValidated();
			return;
		case GL_INFO_LOG_LENGTH:
			*params = programObject->getInfoLogLength();
			return;
		case GL_ATTACHED_SHADERS:
			*params = programObject->getAttachedShadersCount();
			return;
		case GL_ACTIVE_ATTRIBUTES:
			*params = programObject->getActiveAttributeCount();
			return;
		case GL_ACTIVE_ATTRIBUTE_MAX_LENGTH:
			*params = programObject->getActiveAttributeMaxLength();
			return;
		case GL_ACTIVE_UNIFORMS:
			*params = programObject->getActiveUniformCount();
			return;
		case GL_ACTIVE_UNIFORM_MAX_LENGTH:
			*params = programObject->getActiveUniformMaxLength();
			return;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY glGetProgramInfoLog(GLuint program, GLsizei bufsize, GLsizei* length, GLchar* infolog)
{
	TRACE("(GLuint program = %d, GLsizei bufsize = %d, GLsizei* length = 0x%0.8p, GLchar* infolog = 0x%0.8p)",
	      program, bufsize, length, infolog);

	if(bufsize < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *programObject = context->getProgram(program);

		if(!programObject)
		{
			return error(GL_INVALID_VALUE);
		}

		programObject->getInfoLog(bufsize, length, infolog);
	}
}

void GL_APIENTRY glGetQueryivEXT(GLenum target, GLenum pname, GLint *params)
{
	TRACE("GLenum target = 0x%X, GLenum pname = 0x%X, GLint *params = 0x%0.8p)", target, pname, params);

	switch(pname)
	{
	case GL_CURRENT_QUERY_EXT:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		params[0] = context->getActiveQuery(target);
	}
}

void GL_APIENTRY glGetQueryObjectuivEXT(GLuint name, GLenum pname, GLuint *params)
{
	TRACE("(GLuint name = %d, GLenum pname = 0x%X, GLuint *params = 0x%0.8p)", name, pname, params);

	switch(pname)
	{
	case GL_QUERY_RESULT_EXT:
	case GL_QUERY_RESULT_AVAILABLE_EXT:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Query *queryObject = context->getQuery(name, false, GL_NONE);

		if(!queryObject)
		{
			return error(GL_INVALID_OPERATION);
		}

		if(context->getActiveQuery(queryObject->getType()) == name)
		{
			return error(GL_INVALID_OPERATION);
		}

		switch(pname)
		{
		case GL_QUERY_RESULT_EXT:
			params[0] = queryObject->getResult();
			break;
		case GL_QUERY_RESULT_AVAILABLE_EXT:
			params[0] = queryObject->isResultAvailable();
			break;
		default:
			ASSERT(false);
		}
	}
}

void GL_APIENTRY glGetRenderbufferParameteriv(GLenum target, GLenum pname, GLint* params)
{
	TRACE("(GLenum target = 0x%X, GLenum pname = 0x%X, GLint* params = 0x%0.8p)", target, pname, params);

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(target != GL_RENDERBUFFER)
		{
			return error(GL_INVALID_ENUM);
		}

		if(context->getRenderbufferName() == 0)
		{
			return error(GL_INVALID_OPERATION);
		}

		gl::Renderbuffer *renderbuffer = context->getRenderbuffer(context->getRenderbufferName());

		switch(pname)
		{
		case GL_RENDERBUFFER_WIDTH:           *params = renderbuffer->getWidth();       break;
		case GL_RENDERBUFFER_HEIGHT:          *params = renderbuffer->getHeight();      break;
		case GL_RENDERBUFFER_INTERNAL_FORMAT: *params = renderbuffer->getFormat();      break;
		case GL_RENDERBUFFER_RED_SIZE:        *params = renderbuffer->getRedSize();     break;
		case GL_RENDERBUFFER_GREEN_SIZE:      *params = renderbuffer->getGreenSize();   break;
		case GL_RENDERBUFFER_BLUE_SIZE:       *params = renderbuffer->getBlueSize();    break;
		case GL_RENDERBUFFER_ALPHA_SIZE:      *params = renderbuffer->getAlphaSize();   break;
		case GL_RENDERBUFFER_DEPTH_SIZE:      *params = renderbuffer->getDepthSize();   break;
		case GL_RENDERBUFFER_STENCIL_SIZE:    *params = renderbuffer->getStencilSize(); break;
		case GL_RENDERBUFFER_SAMPLES_ANGLE:   *params = renderbuffer->getSamples();     break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY glGetShaderiv(GLuint shader, GLenum pname, GLint* params)
{
	TRACE("(GLuint shader = %d, GLenum pname = %d, GLint* params = 0x%0.8p)", shader, pname, params);

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Shader *shaderObject = context->getShader(shader);

		if(!shaderObject)
		{
			return error(GL_INVALID_VALUE);
		}

		switch(pname)
		{
		case GL_SHADER_TYPE:
			*params = shaderObject->getType();
			return;
		case GL_DELETE_STATUS:
			*params = shaderObject->isFlaggedForDeletion();
			return;
		case GL_COMPILE_STATUS:
			*params = shaderObject->isCompiled() ? GL_TRUE : GL_FALSE;
			return;
		case GL_INFO_LOG_LENGTH:
			*params = shaderObject->getInfoLogLength();
			return;
		case GL_SHADER_SOURCE_LENGTH:
			*params = shaderObject->getSourceLength();
			return;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY glGetShaderInfoLog(GLuint shader, GLsizei bufsize, GLsizei* length, GLchar* infolog)
{
	TRACE("(GLuint shader = %d, GLsizei bufsize = %d, GLsizei* length = 0x%0.8p, GLchar* infolog = 0x%0.8p)",
	      shader, bufsize, length, infolog);

	if(bufsize < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Shader *shaderObject = context->getShader(shader);

		if(!shaderObject)
		{
			return error(GL_INVALID_VALUE);
		}

		shaderObject->getInfoLog(bufsize, length, infolog);
	}
}

void GL_APIENTRY glGetShaderPrecisionFormat(GLenum shadertype, GLenum precisiontype, GLint* range, GLint* precision)
{
	TRACE("(GLenum shadertype = 0x%X, GLenum precisiontype = 0x%X, GLint* range = 0x%0.8p, GLint* precision = 0x%0.8p)",
	      shadertype, precisiontype, range, precision);

	switch(shadertype)
	{
	case GL_VERTEX_SHADER:
	case GL_FRAGMENT_SHADER:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	switch(precisiontype)
	{
	case GL_LOW_FLOAT:
	case GL_MEDIUM_FLOAT:
	case GL_HIGH_FLOAT:
		// IEEE 754 single-precision
		range[0] = 127;
		range[1] = 127;
		*precision = 23;
		break;
	case GL_LOW_INT:
	case GL_MEDIUM_INT:
	case GL_HIGH_INT:
		// Single-precision floating-point numbers can accurately represent integers up to +/-16777216
		range[0] = 24;
		range[1] = 24;
		*precision = 0;
		break;
	default:
		return error(GL_INVALID_ENUM);
	}
}

void GL_APIENTRY glGetShaderSource(GLuint shader, GLsizei bufsize, GLsizei* length, GLchar* source)
{
	TRACE("(GLuint shader = %d, GLsizei bufsize = %d, GLsizei* length = 0x%0.8p, GLchar* source = 0x%0.8p)",
	      shader, bufsize, length, source);

	if(bufsize < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Shader *shaderObject = context->getShader(shader);

		if(!shaderObject)
		{
			return error(GL_INVALID_OPERATION);
		}

		shaderObject->getSource(bufsize, length, source);
	}
}

const GLubyte* GL_APIENTRY glGetString(GLenum name)
{
	TRACE("(GLenum name = 0x%X)", name);

	gl::Context *context = gl::getContext();

	switch(name)
	{
	case GL_VENDOR:
		return (GLubyte*)"TransGaming Inc.";
	case GL_RENDERER:
		return (GLubyte*)"SwiftShader";
	case GL_VERSION:
		return (GLubyte*)"OpenGL ES 2.0 SwiftShader " VERSION_STRING;
	case GL_SHADING_LANGUAGE_VERSION:
		return (GLubyte*)"OpenGL ES GLSL ES 1.00 SwiftShader " VERSION_STRING;
	case GL_EXTENSIONS:
		// Keep list sorted in following order:
		// OES extensions
		// EXT extensions
		// Vendor extensions
		return (GLubyte*)
			"GL_OES_compressed_ETC1_RGB8_texture "
			"GL_OES_depth_texture "
			"GL_OES_depth_texture_cube_map "
			"GL_OES_EGL_image "
			"GL_OES_EGL_image_external "
			"GL_OES_element_index_uint "
			"GL_OES_packed_depth_stencil "
			"GL_OES_rgb8_rgba8 "
			"GL_OES_standard_derivatives "
			"GL_OES_texture_float "
			"GL_OES_texture_float_linear "
			"GL_OES_texture_half_float "
			"GL_OES_texture_half_float_linear "
			"GL_OES_texture_npot "
			"GL_EXT_blend_minmax "
			"GL_EXT_occlusion_query_boolean "
			"GL_EXT_read_format_bgra "
			#if (S3TC_SUPPORT)
			"GL_EXT_texture_compression_dxt1 "
			#endif
			"GL_EXT_texture_filter_anisotropic "
			"GL_EXT_texture_format_BGRA8888 "
			"GL_ANGLE_framebuffer_blit "
			"GL_ANGLE_framebuffer_multisample "
			#if (S3TC_SUPPORT)
			"GL_ANGLE_texture_compression_dxt3 "
			"GL_ANGLE_texture_compression_dxt5 "
			#endif
			"GL_NV_fence";
	default:
		return error(GL_INVALID_ENUM, (GLubyte*)NULL);
	}
}

void GL_APIENTRY glGetTexParameterfv(GLenum target, GLenum pname, GLfloat* params)
{
	TRACE("(GLenum target = 0x%X, GLenum pname = 0x%X, GLfloat* params = 0x%0.8p)", target, pname, params);

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Texture *texture;

		switch(target)
		{
		case GL_TEXTURE_2D:
			texture = context->getTexture2D();
			break;
		case GL_TEXTURE_CUBE_MAP:
			texture = context->getTextureCubeMap();
			break;
		case GL_TEXTURE_EXTERNAL_OES:
			texture = context->getTextureExternal();
			break;
		default:
			return error(GL_INVALID_ENUM);
		}

		switch(pname)
		{
		case GL_TEXTURE_MAG_FILTER:
			*params = (GLfloat)texture->getMagFilter();
			break;
		case GL_TEXTURE_MIN_FILTER:
			*params = (GLfloat)texture->getMinFilter();
			break;
		case GL_TEXTURE_WRAP_S:
			*params = (GLfloat)texture->getWrapS();
			break;
		case GL_TEXTURE_WRAP_T:
			*params = (GLfloat)texture->getWrapT();
			break;
		case GL_TEXTURE_MAX_ANISOTROPY_EXT:
			*params = texture->getMaxAnisotropy();
			break;
		case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
			*params = (GLfloat)1;
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY glGetTexParameteriv(GLenum target, GLenum pname, GLint* params)
{
	TRACE("(GLenum target = 0x%X, GLenum pname = 0x%X, GLint* params = 0x%0.8p)", target, pname, params);

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Texture *texture;

		switch(target)
		{
		case GL_TEXTURE_2D:
			texture = context->getTexture2D();
			break;
		case GL_TEXTURE_CUBE_MAP:
			texture = context->getTextureCubeMap();
			break;
		case GL_TEXTURE_EXTERNAL_OES:
			texture = context->getTextureExternal();
			break;
		default:
			return error(GL_INVALID_ENUM);
		}

		switch(pname)
		{
		case GL_TEXTURE_MAG_FILTER:
			*params = texture->getMagFilter();
			break;
		case GL_TEXTURE_MIN_FILTER:
			*params = texture->getMinFilter();
			break;
		case GL_TEXTURE_WRAP_S:
			*params = texture->getWrapS();
			break;
		case GL_TEXTURE_WRAP_T:
			*params = texture->getWrapT();
			break;
		case GL_TEXTURE_MAX_ANISOTROPY_EXT:
			*params = (GLint)texture->getMaxAnisotropy();
			break;
		case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
			*params = 1;
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY glGetnUniformfvEXT(GLuint program, GLint location, GLsizei bufSize, GLfloat* params)
{
	TRACE("(GLuint program = %d, GLint location = %d, GLsizei bufSize = %d, GLfloat* params = 0x%0.8p)",
	      program, location, bufSize, params);

	if(bufSize < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(program == 0)
		{
			return error(GL_INVALID_VALUE);
		}

		gl::Program *programObject = context->getProgram(program);

		if(!programObject || !programObject->isLinked())
		{
			return error(GL_INVALID_OPERATION);
		}

		if(!programObject->getUniformfv(location, &bufSize, params))
		{
			return error(GL_INVALID_OPERATION);
		}
	}
}

void GL_APIENTRY glGetUniformfv(GLuint program, GLint location, GLfloat* params)
{
	TRACE("(GLuint program = %d, GLint location = %d, GLfloat* params = 0x%0.8p)", program, location, params);

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(program == 0)
		{
			return error(GL_INVALID_VALUE);
		}

		gl::Program *programObject = context->getProgram(program);

		if(!programObject || !programObject->isLinked())
		{
			return error(GL_INVALID_OPERATION);
		}

		if(!programObject->getUniformfv(location, NULL, params))
		{
			return error(GL_INVALID_OPERATION);
		}
	}
}

void GL_APIENTRY glGetnUniformivEXT(GLuint program, GLint location, GLsizei bufSize, GLint* params)
{
	TRACE("(GLuint program = %d, GLint location = %d, GLsizei bufSize = %d, GLint* params = 0x%0.8p)",
	      program, location, bufSize, params);

	if(bufSize < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(program == 0)
		{
			return error(GL_INVALID_VALUE);
		}

		gl::Program *programObject = context->getProgram(program);

		if(!programObject || !programObject->isLinked())
		{
			return error(GL_INVALID_OPERATION);
		}

		if(!programObject)
		{
			return error(GL_INVALID_OPERATION);
		}

		if(!programObject->getUniformiv(location, &bufSize, params))
		{
			return error(GL_INVALID_OPERATION);
		}
	}
}

void GL_APIENTRY glGetUniformiv(GLuint program, GLint location, GLint* params)
{
	TRACE("(GLuint program = %d, GLint location = %d, GLint* params = 0x%0.8p)", program, location, params);

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(program == 0)
		{
			return error(GL_INVALID_VALUE);
		}

		gl::Program *programObject = context->getProgram(program);

		if(!programObject || !programObject->isLinked())
		{
			return error(GL_INVALID_OPERATION);
		}

		if(!programObject)
		{
			return error(GL_INVALID_OPERATION);
		}

		if(!programObject->getUniformiv(location, NULL, params))
		{
			return error(GL_INVALID_OPERATION);
		}
	}
}

int GL_APIENTRY glGetUniformLocation(GLuint program, const GLchar* name)
{
	TRACE("(GLuint program = %d, const GLchar* name = %s)", program, name);

	gl::Context *context = gl::getContext();

	if(strstr(name, "gl_") == name)
	{
		return -1;
	}

	if(context)
	{
		gl::Program *programObject = context->getProgram(program);

		if(!programObject)
		{
			if(context->getShader(program))
			{
				return error(GL_INVALID_OPERATION, -1);
			}
			else
			{
				return error(GL_INVALID_VALUE, -1);
			}
		}

		if(!programObject->isLinked())
		{
			return error(GL_INVALID_OPERATION, -1);
		}

		return programObject->getUniformLocation(name);
	}

	return -1;
}

void GL_APIENTRY glGetVertexAttribfv(GLuint index, GLenum pname, GLfloat* params)
{
	TRACE("(GLuint index = %d, GLenum pname = 0x%X, GLfloat* params = 0x%0.8p)", index, pname, params);

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(index >= gl::MAX_VERTEX_ATTRIBS)
		{
			return error(GL_INVALID_VALUE);
		}

		const gl::VertexAttribute &attribState = context->getVertexAttribState(index);

		switch(pname)
		{
		case GL_VERTEX_ATTRIB_ARRAY_ENABLED:
			*params = (GLfloat)(attribState.mArrayEnabled ? GL_TRUE : GL_FALSE);
			break;
		case GL_VERTEX_ATTRIB_ARRAY_SIZE:
			*params = (GLfloat)attribState.mSize;
			break;
		case GL_VERTEX_ATTRIB_ARRAY_STRIDE:
			*params = (GLfloat)attribState.mStride;
			break;
		case GL_VERTEX_ATTRIB_ARRAY_TYPE:
			*params = (GLfloat)attribState.mType;
			break;
		case GL_VERTEX_ATTRIB_ARRAY_NORMALIZED:
			*params = (GLfloat)(attribState.mNormalized ? GL_TRUE : GL_FALSE);
			break;
		case GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING:
			*params = (GLfloat)attribState.mBoundBuffer.name();
			break;
		case GL_CURRENT_VERTEX_ATTRIB:
			for(int i = 0; i < 4; ++i)
			{
				params[i] = attribState.mCurrentValue[i];
			}
			break;
		default: return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY glGetVertexAttribiv(GLuint index, GLenum pname, GLint* params)
{
	TRACE("(GLuint index = %d, GLenum pname = 0x%X, GLint* params = 0x%0.8p)", index, pname, params);

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(index >= gl::MAX_VERTEX_ATTRIBS)
		{
			return error(GL_INVALID_VALUE);
		}

		const gl::VertexAttribute &attribState = context->getVertexAttribState(index);

		switch(pname)
		{
		case GL_VERTEX_ATTRIB_ARRAY_ENABLED:
			*params = (attribState.mArrayEnabled ? GL_TRUE : GL_FALSE);
			break;
		case GL_VERTEX_ATTRIB_ARRAY_SIZE:
			*params = attribState.mSize;
			break;
		case GL_VERTEX_ATTRIB_ARRAY_STRIDE:
			*params = attribState.mStride;
			break;
		case GL_VERTEX_ATTRIB_ARRAY_TYPE:
			*params = attribState.mType;
			break;
		case GL_VERTEX_ATTRIB_ARRAY_NORMALIZED:
			*params = (attribState.mNormalized ? GL_TRUE : GL_FALSE);
			break;
		case GL_VERTEX_ATTRIB_ARRAY_BUFFER_BINDING:
			*params = attribState.mBoundBuffer.name();
			break;
		case GL_CURRENT_VERTEX_ATTRIB:
			for(int i = 0; i < 4; ++i)
			{
				float currentValue = attribState.mCurrentValue[i];
				params[i] = (GLint)(currentValue > 0.0f ? floor(currentValue + 0.5f) : ceil(currentValue - 0.5f));
			}
			break;
		default: return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY glGetVertexAttribPointerv(GLuint index, GLenum pname, GLvoid** pointer)
{
	TRACE("(GLuint index = %d, GLenum pname = 0x%X, GLvoid** pointer = 0x%0.8p)", index, pname, pointer);

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(index >= gl::MAX_VERTEX_ATTRIBS)
		{
			return error(GL_INVALID_VALUE);
		}

		if(pname != GL_VERTEX_ATTRIB_ARRAY_POINTER)
		{
			return error(GL_INVALID_ENUM);
		}

		*pointer = const_cast<GLvoid*>(context->getVertexAttribPointer(index));
	}
}

void GL_APIENTRY glHint(GLenum target, GLenum mode)
{
	TRACE("(GLenum target = 0x%X, GLenum mode = 0x%X)", target, mode);

	switch(mode)
	{
	case GL_FASTEST:
	case GL_NICEST:
	case GL_DONT_CARE:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	gl::Context *context = gl::getContext();
	switch(target)
	{
	case GL_GENERATE_MIPMAP_HINT:
		if(context) context->setGenerateMipmapHint(mode);
		break;
	case GL_FRAGMENT_SHADER_DERIVATIVE_HINT_OES:
		if(context) context->setFragmentShaderDerivativeHint(mode);
		break;
	default:
		return error(GL_INVALID_ENUM);
	}
}

GLboolean GL_APIENTRY glIsBuffer(GLuint buffer)
{
	TRACE("(GLuint buffer = %d)", buffer);

	gl::Context *context = gl::getContext();

	if(context && buffer)
	{
		gl::Buffer *bufferObject = context->getBuffer(buffer);

		if(bufferObject)
		{
			return GL_TRUE;
		}
	}

	return GL_FALSE;
}

GLboolean GL_APIENTRY glIsEnabled(GLenum cap)
{
	TRACE("(GLenum cap = 0x%X)", cap);

	gl::Context *context = gl::getContext();

	if(context)
	{
		switch(cap)
		{
		case GL_CULL_FACE:                return context->isCullFaceEnabled();
		case GL_POLYGON_OFFSET_FILL:      return context->isPolygonOffsetFillEnabled();
		case GL_SAMPLE_ALPHA_TO_COVERAGE: return context->isSampleAlphaToCoverageEnabled();
		case GL_SAMPLE_COVERAGE:          return context->isSampleCoverageEnabled();
		case GL_SCISSOR_TEST:             return context->isScissorTestEnabled();
		case GL_STENCIL_TEST:             return context->isStencilTestEnabled();
		case GL_DEPTH_TEST:               return context->isDepthTestEnabled();
		case GL_BLEND:                    return context->isBlendEnabled();
		case GL_DITHER:                   return context->isDitherEnabled();
		default:
			return error(GL_INVALID_ENUM, false);
		}
	}

	return false;
}

GLboolean GL_APIENTRY glIsFenceNV(GLuint fence)
{
	TRACE("(GLuint fence = %d)", fence);

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Fence *fenceObject = context->getFence(fence);

		if(fenceObject == NULL)
		{
			return GL_FALSE;
		}

		return fenceObject->isFence();
	}

	return GL_FALSE;
}

GLboolean GL_APIENTRY glIsFramebuffer(GLuint framebuffer)
{
	TRACE("(GLuint framebuffer = %d)", framebuffer);

	gl::Context *context = gl::getContext();

	if(context && framebuffer)
	{
		gl::Framebuffer *framebufferObject = context->getFramebuffer(framebuffer);

		if(framebufferObject)
		{
			return GL_TRUE;
		}
	}

	return GL_FALSE;
}

GLboolean GL_APIENTRY glIsProgram(GLuint program)
{
	TRACE("(GLuint program = %d)", program);

	gl::Context *context = gl::getContext();

	if(context && program)
	{
		gl::Program *programObject = context->getProgram(program);

		if(programObject)
		{
			return GL_TRUE;
		}
	}

	return GL_FALSE;
}

GLboolean GL_APIENTRY glIsQueryEXT(GLuint name)
{
	TRACE("(GLuint name = %d)", name);

	if(name == 0)
	{
		return GL_FALSE;
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Query *queryObject = context->getQuery(name, false, GL_NONE);

		if(queryObject)
		{
			return GL_TRUE;
		}
	}

	return GL_FALSE;
}

GLboolean GL_APIENTRY glIsRenderbuffer(GLuint renderbuffer)
{
	TRACE("(GLuint renderbuffer = %d)", renderbuffer);

	gl::Context *context = gl::getContext();

	if(context && renderbuffer)
	{
		gl::Renderbuffer *renderbufferObject = context->getRenderbuffer(renderbuffer);

		if(renderbufferObject)
		{
			return GL_TRUE;
		}
	}

	return GL_FALSE;
}

GLboolean GL_APIENTRY glIsShader(GLuint shader)
{
	TRACE("(GLuint shader = %d)", shader);

	gl::Context *context = gl::getContext();

	if(context && shader)
	{
		gl::Shader *shaderObject = context->getShader(shader);

		if(shaderObject)
		{
			return GL_TRUE;
		}
	}

	return GL_FALSE;
}

GLboolean GL_APIENTRY glIsTexture(GLuint texture)
{
	TRACE("(GLuint texture = %d)", texture);

	gl::Context *context = gl::getContext();

	if(context && texture)
	{
		gl::Texture *textureObject = context->getTexture(texture);

		if(textureObject)
		{
			return GL_TRUE;
		}
	}

	return GL_FALSE;
}

void GL_APIENTRY glLineWidth(GLfloat width)
{
	TRACE("(GLfloat width = %f)", width);

	if(width <= 0.0f)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->setLineWidth(width);
	}
}

void GL_APIENTRY glLinkProgram(GLuint program)
{
	TRACE("(GLuint program = %d)", program);

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *programObject = context->getProgram(program);

		if(!programObject)
		{
			if(context->getShader(program))
			{
				return error(GL_INVALID_OPERATION);
			}
			else
			{
				return error(GL_INVALID_VALUE);
			}
		}

		programObject->link();
	}
}

void GL_APIENTRY glPixelStorei(GLenum pname, GLint param)
{
	TRACE("(GLenum pname = 0x%X, GLint param = %d)", pname, param);

	gl::Context *context = gl::getContext();

	if(context)
	{
		switch(pname)
		{
		case GL_UNPACK_ALIGNMENT:
			if(param != 1 && param != 2 && param != 4 && param != 8)
			{
				return error(GL_INVALID_VALUE);
			}
			context->setUnpackAlignment(param);
			break;
		case GL_PACK_ALIGNMENT:
			if(param != 1 && param != 2 && param != 4 && param != 8)
			{
				return error(GL_INVALID_VALUE);
			}
			context->setPackAlignment(param);
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY glPolygonOffset(GLfloat factor, GLfloat units)
{
	TRACE("(GLfloat factor = %f, GLfloat units = %f)", factor, units);

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->setPolygonOffsetParams(factor, units);
	}
}

void GL_APIENTRY glReadnPixelsEXT(GLint x, GLint y, GLsizei width, GLsizei height,
                                  GLenum format, GLenum type, GLsizei bufSize, GLvoid *data)
{
	TRACE("(GLint x = %d, GLint y = %d, GLsizei width = %d, GLsizei height = %d, "
	      "GLenum format = 0x%X, GLenum type = 0x%X, GLsizei bufSize = 0x%d, GLvoid *data = 0x%0.8p)",
	      x, y, width, height, format, type, bufSize, data);

	if(width < 0 || height < 0 || bufSize < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	if(!validReadFormatType(format, type))
	{
		return error(GL_INVALID_OPERATION);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->readPixels(x, y, width, height, format, type, &bufSize, data);
	}
}

void GL_APIENTRY glReadPixels(GLint x, GLint y, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid* pixels)
{
	TRACE("(GLint x = %d, GLint y = %d, GLsizei width = %d, GLsizei height = %d, "
	      "GLenum format = 0x%X, GLenum type = 0x%X, GLvoid* pixels = 0x%0.8p)",
	      x, y, width, height, format, type,  pixels);

	if(width < 0 || height < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	if(!validReadFormatType(format, type))
	{
		return error(GL_INVALID_OPERATION);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->readPixels(x, y, width, height, format, type, NULL, pixels);
	}
}

void GL_APIENTRY glReleaseShaderCompiler(void)
{
	TRACE("()");

	gl::Shader::releaseCompiler();
}

void GL_APIENTRY glRenderbufferStorageMultisampleANGLE(GLenum target, GLsizei samples, GLenum internalformat, GLsizei width, GLsizei height)
{
	TRACE("(GLenum target = 0x%X, GLsizei samples = %d, GLenum internalformat = 0x%X, GLsizei width = %d, GLsizei height = %d)",
	      target, samples, internalformat, width, height);

	switch(target)
	{
	case GL_RENDERBUFFER:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	if(!gl::IsColorRenderable(internalformat) && !gl::IsDepthRenderable(internalformat) && !gl::IsStencilRenderable(internalformat))
	{
		return error(GL_INVALID_ENUM);
	}

	if(width < 0 || height < 0 || samples < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(width > gl::IMPLEMENTATION_MAX_RENDERBUFFER_SIZE ||
		   height > gl::IMPLEMENTATION_MAX_RENDERBUFFER_SIZE ||
		   samples > gl::IMPLEMENTATION_MAX_SAMPLES)
		{
			return error(GL_INVALID_VALUE);
		}

		GLuint handle = context->getRenderbufferName();
		if(handle == 0)
		{
			return error(GL_INVALID_OPERATION);
		}

		switch(internalformat)
		{
		case GL_DEPTH_COMPONENT16:
			context->setRenderbufferStorage(new gl::Depthbuffer(width, height, samples));
			break;
		case GL_RGBA4:
		case GL_RGB5_A1:
		case GL_RGB565:
		case GL_RGB8_OES:
		case GL_RGBA8_OES:
			context->setRenderbufferStorage(new gl::Colorbuffer(width, height, internalformat, samples));
			break;
		case GL_STENCIL_INDEX8:
			context->setRenderbufferStorage(new gl::Stencilbuffer(width, height, samples));
			break;
		case GL_DEPTH24_STENCIL8_OES:
			context->setRenderbufferStorage(new gl::DepthStencilbuffer(width, height, samples));
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY glRenderbufferStorage(GLenum target, GLenum internalformat, GLsizei width, GLsizei height)
{
	glRenderbufferStorageMultisampleANGLE(target, 0, internalformat, width, height);
}

void GL_APIENTRY glSampleCoverage(GLclampf value, GLboolean invert)
{
	TRACE("(GLclampf value = %f, GLboolean invert = %d)", value, invert);

	gl::Context* context = gl::getContext();

	if(context)
	{
		context->setSampleCoverageParams(gl::clamp01(value), invert == GL_TRUE);
	}
}

void GL_APIENTRY glSetFenceNV(GLuint fence, GLenum condition)
{
	TRACE("(GLuint fence = %d, GLenum condition = 0x%X)", fence, condition);

	if(condition != GL_ALL_COMPLETED_NV)
	{
		return error(GL_INVALID_ENUM);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Fence *fenceObject = context->getFence(fence);

		if(fenceObject == NULL)
		{
			return error(GL_INVALID_OPERATION);
		}

		fenceObject->setFence(condition);
	}
}

void GL_APIENTRY glScissor(GLint x, GLint y, GLsizei width, GLsizei height)
{
	TRACE("(GLint x = %d, GLint y = %d, GLsizei width = %d, GLsizei height = %d)", x, y, width, height);

	if(width < 0 || height < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context* context = gl::getContext();

	if(context)
	{
		context->setScissorParams(x, y, width, height);
	}
}

void GL_APIENTRY glShaderBinary(GLsizei n, const GLuint* shaders, GLenum binaryformat, const GLvoid* binary, GLsizei length)
{
	TRACE("(GLsizei n = %d, const GLuint* shaders = 0x%0.8p, GLenum binaryformat = 0x%X, "
	      "const GLvoid* binary = 0x%0.8p, GLsizei length = %d)",
	      n, shaders, binaryformat, binary, length);

	// No binary shader formats are supported.
	return error(GL_INVALID_ENUM);
}

void GL_APIENTRY glShaderSource(GLuint shader, GLsizei count, const GLchar *const *string, const GLint *length)
{
	TRACE("(GLuint shader = %d, GLsizei count = %d, const GLchar** string = 0x%0.8p, const GLint* length = 0x%0.8p)",
	      shader, count, string, length);

	if(count < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Shader *shaderObject = context->getShader(shader);

		if(!shaderObject)
		{
			if(context->getProgram(shader))
			{
				return error(GL_INVALID_OPERATION);
			}
			else
			{
				return error(GL_INVALID_VALUE);
			}
		}

		shaderObject->setSource(count, string, length);
	}
}

void GL_APIENTRY glStencilFunc(GLenum func, GLint ref, GLuint mask)
{
	glStencilFuncSeparate(GL_FRONT_AND_BACK, func, ref, mask);
}

void GL_APIENTRY glStencilFuncSeparate(GLenum face, GLenum func, GLint ref, GLuint mask)
{
	TRACE("(GLenum face = 0x%X, GLenum func = 0x%X, GLint ref = %d, GLuint mask = %d)", face, func, ref, mask);

	switch(face)
	{
	case GL_FRONT:
	case GL_BACK:
	case GL_FRONT_AND_BACK:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	switch(func)
	{
	case GL_NEVER:
	case GL_ALWAYS:
	case GL_LESS:
	case GL_LEQUAL:
	case GL_EQUAL:
	case GL_GEQUAL:
	case GL_GREATER:
	case GL_NOTEQUAL:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(face == GL_FRONT || face == GL_FRONT_AND_BACK)
		{
			context->setStencilParams(func, ref, mask);
		}

		if(face == GL_BACK || face == GL_FRONT_AND_BACK)
		{
			context->setStencilBackParams(func, ref, mask);
		}
	}
}

void GL_APIENTRY glStencilMask(GLuint mask)
{
	glStencilMaskSeparate(GL_FRONT_AND_BACK, mask);
}

void GL_APIENTRY glStencilMaskSeparate(GLenum face, GLuint mask)
{
	TRACE("(GLenum face = 0x%X, GLuint mask = %d)", face, mask);

	switch(face)
	{
	case GL_FRONT:
	case GL_BACK:
	case GL_FRONT_AND_BACK:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(face == GL_FRONT || face == GL_FRONT_AND_BACK)
		{
			context->setStencilWritemask(mask);
		}

		if(face == GL_BACK || face == GL_FRONT_AND_BACK)
		{
			context->setStencilBackWritemask(mask);
		}
	}
}

void GL_APIENTRY glStencilOp(GLenum fail, GLenum zfail, GLenum zpass)
{
	glStencilOpSeparate(GL_FRONT_AND_BACK, fail, zfail, zpass);
}

void GL_APIENTRY glStencilOpSeparate(GLenum face, GLenum fail, GLenum zfail, GLenum zpass)
{
	TRACE("(GLenum face = 0x%X, GLenum fail = 0x%X, GLenum zfail = 0x%X, GLenum zpas = 0x%Xs)",
	      face, fail, zfail, zpass);

	switch(face)
	{
	case GL_FRONT:
	case GL_BACK:
	case GL_FRONT_AND_BACK:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	switch(fail)
	{
	case GL_ZERO:
	case GL_KEEP:
	case GL_REPLACE:
	case GL_INCR:
	case GL_DECR:
	case GL_INVERT:
	case GL_INCR_WRAP:
	case GL_DECR_WRAP:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	switch(zfail)
	{
	case GL_ZERO:
	case GL_KEEP:
	case GL_REPLACE:
	case GL_INCR:
	case GL_DECR:
	case GL_INVERT:
	case GL_INCR_WRAP:
	case GL_DECR_WRAP:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	switch(zpass)
	{
	case GL_ZERO:
	case GL_KEEP:
	case GL_REPLACE:
	case GL_INCR:
	case GL_DECR:
	case GL_INVERT:
	case GL_INCR_WRAP:
	case GL_DECR_WRAP:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(face == GL_FRONT || face == GL_FRONT_AND_BACK)
		{
			context->setStencilOperations(fail, zfail, zpass);
		}

		if(face == GL_BACK || face == GL_FRONT_AND_BACK)
		{
			context->setStencilBackOperations(fail, zfail, zpass);
		}
	}
}

GLboolean GL_APIENTRY glTestFenceNV(GLuint fence)
{
	TRACE("(GLuint fence = %d)", fence);

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Fence *fenceObject = context->getFence(fence);

		if(fenceObject == NULL)
		{
			return error(GL_INVALID_OPERATION, GL_TRUE);
		}

		return fenceObject->testFence();
	}

	return GL_TRUE;
}

void GL_APIENTRY glTexImage2D(GLenum target, GLint level, GLint internalformat, GLsizei width, GLsizei height,
                              GLint border, GLenum format, GLenum type, const GLvoid* pixels)
{
	TRACE("(GLenum target = 0x%X, GLint level = %d, GLint internalformat = %d, GLsizei width = %d, GLsizei height = %d, "
	      "GLint border = %d, GLenum format = 0x%X, GLenum type = 0x%X, const GLvoid* pixels =  0x%0.8p)",
	      target, level, internalformat, width, height, border, format, type, pixels);

	if(!validImageSize(level, width, height))
	{
		return error(GL_INVALID_VALUE);
	}

	if(internalformat != format)
	{
		return error(GL_INVALID_OPERATION);
	}

	switch(format)
	{
	case GL_ALPHA:
	case GL_LUMINANCE:
	case GL_LUMINANCE_ALPHA:
		switch(type)
		{
		case GL_UNSIGNED_BYTE:
		case GL_FLOAT:
		case GL_HALF_FLOAT_OES:
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
		break;
	case GL_RGB:
		switch(type)
		{
		case GL_UNSIGNED_BYTE:
		case GL_UNSIGNED_SHORT_5_6_5:
		case GL_FLOAT:
		case GL_HALF_FLOAT_OES:
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
		break;
	case GL_RGBA:
		switch(type)
		{
		case GL_UNSIGNED_BYTE:
		case GL_UNSIGNED_SHORT_4_4_4_4:
		case GL_UNSIGNED_SHORT_5_5_5_1:
		case GL_FLOAT:
		case GL_HALF_FLOAT_OES:
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
		break;
	case GL_BGRA_EXT:
		switch(type)
		{
		case GL_UNSIGNED_BYTE:
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
		break;
	case GL_ETC1_RGB8_OES:
		return error(GL_INVALID_OPERATION);
	case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
	case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
	case GL_COMPRESSED_RGBA_S3TC_DXT3_ANGLE:
	case GL_COMPRESSED_RGBA_S3TC_DXT5_ANGLE:
		if(S3TC_SUPPORT)
		{
			return error(GL_INVALID_OPERATION);
		}
		else
		{
			return error(GL_INVALID_ENUM);
		}
	case GL_DEPTH_COMPONENT:
		switch(type)
		{
		case GL_UNSIGNED_SHORT:
		case GL_UNSIGNED_INT:
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
		break;
	case GL_DEPTH_STENCIL_OES:
		switch(type)
		{
		case GL_UNSIGNED_INT_24_8_OES:
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
		break;
	default:
		return error(GL_INVALID_VALUE);
	}

	if(border != 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		switch(target)
		{
		case GL_TEXTURE_2D:
			if(width > (gl::IMPLEMENTATION_MAX_TEXTURE_SIZE >> level) ||
			   height > (gl::IMPLEMENTATION_MAX_TEXTURE_SIZE >> level))
			{
				return error(GL_INVALID_VALUE);
			}
			break;
		case GL_TEXTURE_CUBE_MAP_POSITIVE_X:
		case GL_TEXTURE_CUBE_MAP_NEGATIVE_X:
		case GL_TEXTURE_CUBE_MAP_POSITIVE_Y:
		case GL_TEXTURE_CUBE_MAP_NEGATIVE_Y:
		case GL_TEXTURE_CUBE_MAP_POSITIVE_Z:
		case GL_TEXTURE_CUBE_MAP_NEGATIVE_Z:
			if(width != height)
			{
				return error(GL_INVALID_VALUE);
			}

			if(width > (gl::IMPLEMENTATION_MAX_CUBE_MAP_TEXTURE_SIZE >> level) ||
			   height > (gl::IMPLEMENTATION_MAX_CUBE_MAP_TEXTURE_SIZE >> level))
			{
				return error(GL_INVALID_VALUE);
			}
			break;
		default:
			return error(GL_INVALID_ENUM);
		}

		if(target == GL_TEXTURE_2D)
		{
			gl::Texture2D *texture = context->getTexture2D();

			if(!texture)
			{
				return error(GL_INVALID_OPERATION);
			}

			texture->setImage(level, width, height, format, type, context->getUnpackAlignment(), pixels);
		}
		else
		{
			gl::TextureCubeMap *texture = context->getTextureCubeMap();

			if(!texture)
			{
				return error(GL_INVALID_OPERATION);
			}

			texture->setImage(target, level, width, height, format, type, context->getUnpackAlignment(), pixels);
		}
	}
}

void GL_APIENTRY glTexParameterf(GLenum target, GLenum pname, GLfloat param)
{
	TRACE("(GLenum target = 0x%X, GLenum pname = 0x%X, GLfloat param = %f)", target, pname, param);

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Texture *texture;

		switch(target)
		{
		case GL_TEXTURE_2D:
			texture = context->getTexture2D();
			break;
		case GL_TEXTURE_CUBE_MAP:
			texture = context->getTextureCubeMap();
			break;
		case GL_TEXTURE_EXTERNAL_OES:
			texture = context->getTextureExternal();
			break;
		default:
			return error(GL_INVALID_ENUM);
		}

		switch(pname)
		{
		case GL_TEXTURE_WRAP_S:
			if(!texture->setWrapS((GLenum)param))
			{
				return error(GL_INVALID_ENUM);
			}
			break;
		case GL_TEXTURE_WRAP_T:
			if(!texture->setWrapT((GLenum)param))
			{
				return error(GL_INVALID_ENUM);
			}
			break;
		case GL_TEXTURE_MIN_FILTER:
			if(!texture->setMinFilter((GLenum)param))
			{
				return error(GL_INVALID_ENUM);
			}
			break;
		case GL_TEXTURE_MAG_FILTER:
			if(!texture->setMagFilter((GLenum)param))
			{
				return error(GL_INVALID_ENUM);
			}
			break;
		case GL_TEXTURE_MAX_ANISOTROPY_EXT:
			if(!texture->setMaxAnisotropy(param))
			{
				return error(GL_INVALID_VALUE);
			}
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY glTexParameterfv(GLenum target, GLenum pname, const GLfloat* params)
{
	glTexParameterf(target, pname, *params);
}

void GL_APIENTRY glTexParameteri(GLenum target, GLenum pname, GLint param)
{
	TRACE("(GLenum target = 0x%X, GLenum pname = 0x%X, GLint param = %d)", target, pname, param);

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Texture *texture;

		switch(target)
		{
		case GL_TEXTURE_2D:
			texture = context->getTexture2D();
			break;
		case GL_TEXTURE_CUBE_MAP:
			texture = context->getTextureCubeMap();
			break;
		case GL_TEXTURE_EXTERNAL_OES:
				texture = context->getTextureExternal();
				break;
		default:
			return error(GL_INVALID_ENUM);
		}

		switch(pname)
		{
		case GL_TEXTURE_WRAP_S:
			if(!texture->setWrapS((GLenum)param))
			{
				return error(GL_INVALID_ENUM);
			}
			break;
		case GL_TEXTURE_WRAP_T:
			if(!texture->setWrapT((GLenum)param))
			{
				return error(GL_INVALID_ENUM);
			}
			break;
		case GL_TEXTURE_MIN_FILTER:
			if(!texture->setMinFilter((GLenum)param))
			{
				return error(GL_INVALID_ENUM);
			}
			break;
		case GL_TEXTURE_MAG_FILTER:
			if(!texture->setMagFilter((GLenum)param))
			{
				return error(GL_INVALID_ENUM);
			}
			break;
		case GL_TEXTURE_MAX_ANISOTROPY_EXT:
			if(!texture->setMaxAnisotropy((GLfloat)param))
			{
				return error(GL_INVALID_VALUE);
			}
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY glTexParameteriv(GLenum target, GLenum pname, const GLint* params)
{
	glTexParameteri(target, pname, *params);
}

void GL_APIENTRY glTexSubImage2D(GLenum target, GLint level, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height,
                                 GLenum format, GLenum type, const GLvoid* pixels)
{
	TRACE("(GLenum target = 0x%X, GLint level = %d, GLint xoffset = %d, GLint yoffset = %d, "
	      "GLsizei width = %d, GLsizei height = %d, GLenum format = 0x%X, GLenum type = 0x%X, "
	      "const GLvoid* pixels = 0x%0.8p)",
	      target, level, xoffset, yoffset, width, height, format, type, pixels);

	if(!gl::IsTextureTarget(target))
	{
		return error(GL_INVALID_ENUM);
	}

	if(level < 0 || xoffset < 0 || yoffset < 0 || width < 0 || height < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	if(std::numeric_limits<GLsizei>::max() - xoffset < width || std::numeric_limits<GLsizei>::max() - yoffset < height)
	{
		return error(GL_INVALID_VALUE);
	}

	if(!gl::CheckTextureFormatType(format, type))
	{
		return error(GL_INVALID_ENUM);
	}

	if(width == 0 || height == 0 || pixels == NULL)
	{
		return;
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(level > gl::IMPLEMENTATION_MAX_TEXTURE_LEVELS)
		{
			return error(GL_INVALID_VALUE);
		}

		if(target == GL_TEXTURE_2D)
		{
			gl::Texture2D *texture = context->getTexture2D();

			if(validateSubImageParams(false, width, height, xoffset, yoffset, target, level, format, texture))
			{
				texture->subImage(level, xoffset, yoffset, width, height, format, type, context->getUnpackAlignment(), pixels);
			}
		}
		else if(gl::IsCubemapTextureTarget(target))
		{
			gl::TextureCubeMap *texture = context->getTextureCubeMap();

			if(validateSubImageParams(false, width, height, xoffset, yoffset, target, level, format, texture))
			{
				texture->subImage(target, level, xoffset, yoffset, width, height, format, type, context->getUnpackAlignment(), pixels);
			}
		}
		else
		{
			UNREACHABLE();
		}
	}
}

void GL_APIENTRY glUniform1f(GLint location, GLfloat x)
{
	glUniform1fv(location, 1, &x);
}

void GL_APIENTRY glUniform1fv(GLint location, GLsizei count, const GLfloat* v)
{
	TRACE("(GLint location = %d, GLsizei count = %d, const GLfloat* v = 0x%0.8p)", location, count, v);

	if(count < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	if(location == -1)
	{
		return;
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *program = context->getCurrentProgram();

		if(!program)
		{
			return error(GL_INVALID_OPERATION);
		}

		if(!program->setUniform1fv(location, count, v))
		{
			return error(GL_INVALID_OPERATION);
		}
	}
}

void GL_APIENTRY glUniform1i(GLint location, GLint x)
{
	glUniform1iv(location, 1, &x);
}

void GL_APIENTRY glUniform1iv(GLint location, GLsizei count, const GLint* v)
{
	TRACE("(GLint location = %d, GLsizei count = %d, const GLint* v = 0x%0.8p)", location, count, v);

	if(count < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	if(location == -1)
	{
		return;
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *program = context->getCurrentProgram();

		if(!program)
		{
			return error(GL_INVALID_OPERATION);
		}

		if(!program->setUniform1iv(location, count, v))
		{
			return error(GL_INVALID_OPERATION);
		}
	}
}

void GL_APIENTRY glUniform2f(GLint location, GLfloat x, GLfloat y)
{
	GLfloat xy[2] = {x, y};

	glUniform2fv(location, 1, (GLfloat*)&xy);
}

void GL_APIENTRY glUniform2fv(GLint location, GLsizei count, const GLfloat* v)
{
	TRACE("(GLint location = %d, GLsizei count = %d, const GLfloat* v = 0x%0.8p)", location, count, v);

	if(count < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	if(location == -1)
	{
		return;
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *program = context->getCurrentProgram();

		if(!program)
		{
			return error(GL_INVALID_OPERATION);
		}

		if(!program->setUniform2fv(location, count, v))
		{
			return error(GL_INVALID_OPERATION);
		}
	}
}

void GL_APIENTRY glUniform2i(GLint location, GLint x, GLint y)
{
	GLint xy[4] = {x, y};

	glUniform2iv(location, 1, (GLint*)&xy);
}

void GL_APIENTRY glUniform2iv(GLint location, GLsizei count, const GLint* v)
{
	TRACE("(GLint location = %d, GLsizei count = %d, const GLint* v = 0x%0.8p)", location, count, v);

	if(count < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	if(location == -1)
	{
		return;
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *program = context->getCurrentProgram();

		if(!program)
		{
			return error(GL_INVALID_OPERATION);
		}

		if(!program->setUniform2iv(location, count, v))
		{
			return error(GL_INVALID_OPERATION);
		}
	}
}

void GL_APIENTRY glUniform3f(GLint location, GLfloat x, GLfloat y, GLfloat z)
{
	GLfloat xyz[3] = {x, y, z};

	glUniform3fv(location, 1, (GLfloat*)&xyz);
}

void GL_APIENTRY glUniform3fv(GLint location, GLsizei count, const GLfloat* v)
{
	TRACE("(GLint location = %d, GLsizei count = %d, const GLfloat* v = 0x%0.8p)", location, count, v);

	if(count < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	if(location == -1)
	{
		return;
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *program = context->getCurrentProgram();

		if(!program)
		{
			return error(GL_INVALID_OPERATION);
		}

		if(!program->setUniform3fv(location, count, v))
		{
			return error(GL_INVALID_OPERATION);
		}
	}
}

void GL_APIENTRY glUniform3i(GLint location, GLint x, GLint y, GLint z)
{
	GLint xyz[3] = {x, y, z};

	glUniform3iv(location, 1, (GLint*)&xyz);
}

void GL_APIENTRY glUniform3iv(GLint location, GLsizei count, const GLint* v)
{
	TRACE("(GLint location = %d, GLsizei count = %d, const GLint* v = 0x%0.8p)", location, count, v);

	if(count < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	if(location == -1)
	{
		return;
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *program = context->getCurrentProgram();

		if(!program)
		{
			return error(GL_INVALID_OPERATION);
		}

		if(!program->setUniform3iv(location, count, v))
		{
			return error(GL_INVALID_OPERATION);
		}
	}
}

void GL_APIENTRY glUniform4f(GLint location, GLfloat x, GLfloat y, GLfloat z, GLfloat w)
{
	GLfloat xyzw[4] = {x, y, z, w};

	glUniform4fv(location, 1, (GLfloat*)&xyzw);
}

void GL_APIENTRY glUniform4fv(GLint location, GLsizei count, const GLfloat* v)
{
	TRACE("(GLint location = %d, GLsizei count = %d, const GLfloat* v = 0x%0.8p)", location, count, v);

	if(count < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	if(location == -1)
	{
		return;
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *program = context->getCurrentProgram();

		if(!program)
		{
			return error(GL_INVALID_OPERATION);
		}

		if(!program->setUniform4fv(location, count, v))
		{
			return error(GL_INVALID_OPERATION);
		}
	}
}

void GL_APIENTRY glUniform4i(GLint location, GLint x, GLint y, GLint z, GLint w)
{
	GLint xyzw[4] = {x, y, z, w};

	glUniform4iv(location, 1, (GLint*)&xyzw);
}

void GL_APIENTRY glUniform4iv(GLint location, GLsizei count, const GLint* v)
{
	TRACE("(GLint location = %d, GLsizei count = %d, const GLint* v = 0x%0.8p)", location, count, v);

	if(count < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	if(location == -1)
	{
		return;
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *program = context->getCurrentProgram();

		if(!program)
		{
			return error(GL_INVALID_OPERATION);
		}

		if(!program->setUniform4iv(location, count, v))
		{
			return error(GL_INVALID_OPERATION);
		}
	}
}

void GL_APIENTRY glUniformMatrix2fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value)
{
	TRACE("(GLint location = %d, GLsizei count = %d, GLboolean transpose = %d, const GLfloat* value = 0x%0.8p)",
	      location, count, transpose, value);

	if(count < 0 || transpose != GL_FALSE)
	{
		return error(GL_INVALID_VALUE);
	}

	if(location == -1)
	{
		return;
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *program = context->getCurrentProgram();

		if(!program)
		{
			return error(GL_INVALID_OPERATION);
		}

		if(!program->setUniformMatrix2fv(location, count, value))
		{
			return error(GL_INVALID_OPERATION);
		}
	}
}

void GL_APIENTRY glUniformMatrix3fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value)
{
	TRACE("(GLint location = %d, GLsizei count = %d, GLboolean transpose = %d, const GLfloat* value = 0x%0.8p)",
	      location, count, transpose, value);

	if(count < 0 || transpose != GL_FALSE)
	{
		return error(GL_INVALID_VALUE);
	}

	if(location == -1)
	{
		return;
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *program = context->getCurrentProgram();

		if(!program)
		{
			return error(GL_INVALID_OPERATION);
		}

		if(!program->setUniformMatrix3fv(location, count, value))
		{
			return error(GL_INVALID_OPERATION);
		}
	}
}

void GL_APIENTRY glUniformMatrix4fv(GLint location, GLsizei count, GLboolean transpose, const GLfloat* value)
{
	TRACE("(GLint location = %d, GLsizei count = %d, GLboolean transpose = %d, const GLfloat* value = 0x%0.8p)",
	      location, count, transpose, value);

	if(count < 0 || transpose != GL_FALSE)
	{
		return error(GL_INVALID_VALUE);
	}

	if(location == -1)
	{
		return;
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *program = context->getCurrentProgram();

		if(!program)
		{
			return error(GL_INVALID_OPERATION);
		}

		if(!program->setUniformMatrix4fv(location, count, value))
		{
			return error(GL_INVALID_OPERATION);
		}
	}
}

void GL_APIENTRY glUseProgram(GLuint program)
{
	TRACE("(GLuint program = %d)", program);

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *programObject = context->getProgram(program);

		if(!programObject && program != 0)
		{
			if(context->getShader(program))
			{
				return error(GL_INVALID_OPERATION);
			}
			else
			{
				return error(GL_INVALID_VALUE);
			}
		}

		if(program != 0 && !programObject->isLinked())
		{
			return error(GL_INVALID_OPERATION);
		}

		context->useProgram(program);
	}
}

void GL_APIENTRY glValidateProgram(GLuint program)
{
	TRACE("(GLuint program = %d)", program);

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Program *programObject = context->getProgram(program);

		if(!programObject)
		{
			if(context->getShader(program))
			{
				return error(GL_INVALID_OPERATION);
			}
			else
			{
				return error(GL_INVALID_VALUE);
			}
		}

		programObject->validate();
	}
}

void GL_APIENTRY glVertexAttrib1f(GLuint index, GLfloat x)
{
	TRACE("(GLuint index = %d, GLfloat x = %f)", index, x);

	if(index >= gl::MAX_VERTEX_ATTRIBS)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		GLfloat vals[4] = { x, 0, 0, 1 };
		context->setVertexAttrib(index, vals);
	}
}

void GL_APIENTRY glVertexAttrib1fv(GLuint index, const GLfloat* values)
{
	TRACE("(GLuint index = %d, const GLfloat* values = 0x%0.8p)", index, values);

	if(index >= gl::MAX_VERTEX_ATTRIBS)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		GLfloat vals[4] = { values[0], 0, 0, 1 };
		context->setVertexAttrib(index, vals);
	}
}

void GL_APIENTRY glVertexAttrib2f(GLuint index, GLfloat x, GLfloat y)
{
	TRACE("(GLuint index = %d, GLfloat x = %f, GLfloat y = %f)", index, x, y);

	if(index >= gl::MAX_VERTEX_ATTRIBS)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		GLfloat vals[4] = { x, y, 0, 1 };
		context->setVertexAttrib(index, vals);
	}
}

void GL_APIENTRY glVertexAttrib2fv(GLuint index, const GLfloat* values)
{
	TRACE("(GLuint index = %d, const GLfloat* values = 0x%0.8p)", index, values);

	if(index >= gl::MAX_VERTEX_ATTRIBS)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		GLfloat vals[4] = { values[0], values[1], 0, 1 };
		context->setVertexAttrib(index, vals);
	}
}

void GL_APIENTRY glVertexAttrib3f(GLuint index, GLfloat x, GLfloat y, GLfloat z)
{
	TRACE("(GLuint index = %d, GLfloat x = %f, GLfloat y = %f, GLfloat z = %f)", index, x, y, z);

	if(index >= gl::MAX_VERTEX_ATTRIBS)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		GLfloat vals[4] = { x, y, z, 1 };
		context->setVertexAttrib(index, vals);
	}
}

void GL_APIENTRY glVertexAttrib3fv(GLuint index, const GLfloat* values)
{
	TRACE("(GLuint index = %d, const GLfloat* values = 0x%0.8p)", index, values);

	if(index >= gl::MAX_VERTEX_ATTRIBS)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		GLfloat vals[4] = { values[0], values[1], values[2], 1 };
		context->setVertexAttrib(index, vals);
	}
}

void GL_APIENTRY glVertexAttrib4f(GLuint index, GLfloat x, GLfloat y, GLfloat z, GLfloat w)
{
	TRACE("(GLuint index = %d, GLfloat x = %f, GLfloat y = %f, GLfloat z = %f, GLfloat w = %f)", index, x, y, z, w);

	if(index >= gl::MAX_VERTEX_ATTRIBS)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		GLfloat vals[4] = { x, y, z, w };
		context->setVertexAttrib(index, vals);
	}
}

void GL_APIENTRY glVertexAttrib4fv(GLuint index, const GLfloat* values)
{
	TRACE("(GLuint index = %d, const GLfloat* values = 0x%0.8p)", index, values);

	if(index >= gl::MAX_VERTEX_ATTRIBS)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->setVertexAttrib(index, values);
	}
}

void GL_APIENTRY glVertexAttribPointer(GLuint index, GLint size, GLenum type, GLboolean normalized, GLsizei stride, const GLvoid* ptr)
{
	TRACE("(GLuint index = %d, GLint size = %d, GLenum type = 0x%X, "
	      "GLboolean normalized = %d, GLsizei stride = %d, const GLvoid* ptr = 0x%0.8p)",
	      index, size, type, normalized, stride, ptr);

	if(index >= gl::MAX_VERTEX_ATTRIBS)
	{
		return error(GL_INVALID_VALUE);
	}

	if(size < 1 || size > 4)
	{
		return error(GL_INVALID_VALUE);
	}

	switch(type)
	{
	case GL_BYTE:
	case GL_UNSIGNED_BYTE:
	case GL_SHORT:
	case GL_UNSIGNED_SHORT:
	case GL_FIXED:
	case GL_FLOAT:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	if(stride < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->setVertexAttribState(index, context->getArrayBuffer(), size, type, (normalized == GL_TRUE), stride, ptr);
	}
}

void GL_APIENTRY glViewport(GLint x, GLint y, GLsizei width, GLsizei height)
{
	TRACE("(GLint x = %d, GLint y = %d, GLsizei width = %d, GLsizei height = %d)", x, y, width, height);

	if(width < 0 || height < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		context->setViewportParams(x, y, width, height);
	}
}

void GL_APIENTRY glBlitFramebufferANGLE(GLint srcX0, GLint srcY0, GLint srcX1, GLint srcY1, GLint dstX0, GLint dstY0, GLint dstX1, GLint dstY1,
                                        GLbitfield mask, GLenum filter)
{
	TRACE("(GLint srcX0 = %d, GLint srcY0 = %d, GLint srcX1 = %d, GLint srcY1 = %d, "
	      "GLint dstX0 = %d, GLint dstY0 = %d, GLint dstX1 = %d, GLint dstY1 = %d, "
	      "GLbitfield mask = 0x%X, GLenum filter = 0x%X)",
	      srcX0, srcY0, srcX1, srcX1, dstX0, dstY0, dstX1, dstY1, mask, filter);

	switch(filter)
	{
	case GL_NEAREST:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	if((mask & ~(GL_COLOR_BUFFER_BIT | GL_STENCIL_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)) != 0)
	{
		return error(GL_INVALID_VALUE);
	}

	if(srcX1 - srcX0 != dstX1 - dstX0 || srcY1 - srcY0 != dstY1 - dstY0)
	{
		ERR("Scaling and flipping in BlitFramebufferANGLE not supported by this implementation");
		return error(GL_INVALID_OPERATION);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		if(context->getReadFramebufferName() == context->getDrawFramebufferName())
		{
			ERR("Blits with the same source and destination framebuffer are not supported by this implementation.");
			return error(GL_INVALID_OPERATION);
		}

		context->blitFramebuffer(srcX0, srcY0, srcX1, srcY1, dstX0, dstY0, dstX1, dstY1, mask);
	}
}

void GL_APIENTRY glTexImage3DOES(GLenum target, GLint level, GLenum internalformat, GLsizei width, GLsizei height, GLsizei depth,
                                 GLint border, GLenum format, GLenum type, const GLvoid* pixels)
{
	TRACE("(GLenum target = 0x%X, GLint level = %d, GLenum internalformat = 0x%X, "
	      "GLsizei width = %d, GLsizei height = %d, GLsizei depth = %d, GLint border = %d, "
	      "GLenum format = 0x%X, GLenum type = 0x%x, const GLvoid* pixels = 0x%0.8p)",
	      target, level, internalformat, width, height, depth, border, format, type, pixels);

	UNIMPLEMENTED();   // FIXME
}

void GL_APIENTRY glEGLImageTargetTexture2DOES(GLenum target, GLeglImageOES image)
{
	if(egl::getClientVersion() == 1)
	{
		static auto glEGLImageTargetTexture2DOES = (PFNGLEGLIMAGETARGETTEXTURE2DOESPROC)es1::getProcAddress("glEGLImageTargetTexture2DOES");
		return glEGLImageTargetTexture2DOES(target, image);
	}

	TRACE("(GLenum target = 0x%X, GLeglImageOES image = 0x%0.8p)", target, image);

	switch(target)
	{
	case GL_TEXTURE_2D:
	case GL_TEXTURE_EXTERNAL_OES:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	if(!image)
	{
		return error(GL_INVALID_OPERATION);
	}

	gl::Context *context = gl::getContext();

	if(context)
	{
		gl::Texture2D *texture = 0;

		switch(target)
		{
		case GL_TEXTURE_2D:           texture = context->getTexture2D();       break;
		case GL_TEXTURE_EXTERNAL_OES: texture = context->getTextureExternal(); break;
		default:                      UNREACHABLE();
		}

		if(!texture)
		{
			return error(GL_INVALID_OPERATION);
		}

		egl::Image *glImage = static_cast<egl::Image*>(image);

		texture->setImage(glImage);
	}
}

void GL_APIENTRY glEGLImageTargetRenderbufferStorageOES(GLenum target, GLeglImageOES image)
{
	TRACE("(GLenum target = 0x%X, GLeglImageOES image = 0x%0.8p)", target, image);

	UNIMPLEMENTED();
}

__eglMustCastToProperFunctionPointerType glGetProcAddress(const char *procname)
{
	struct Extension
	{
		const char *name;
		__eglMustCastToProperFunctionPointerType address;
	};

	static const Extension glExtensions[] =
	{
		#define EXTENSION(name) {#name, (__eglMustCastToProperFunctionPointerType)name}

		EXTENSION(glTexImage3DOES),
		EXTENSION(glBlitFramebufferANGLE),
		EXTENSION(glRenderbufferStorageMultisampleANGLE),
		EXTENSION(glDeleteFencesNV),
		EXTENSION(glGenFencesNV),
		EXTENSION(glIsFenceNV),
		EXTENSION(glTestFenceNV),
		EXTENSION(glGetFenceivNV),
		EXTENSION(glFinishFenceNV),
		EXTENSION(glSetFenceNV),
		EXTENSION(glGetGraphicsResetStatusEXT),
		EXTENSION(glReadnPixelsEXT),
		EXTENSION(glGetnUniformfvEXT),
		EXTENSION(glGetnUniformivEXT),
		EXTENSION(glGenQueriesEXT),
		EXTENSION(glDeleteQueriesEXT),
		EXTENSION(glIsQueryEXT),
		EXTENSION(glBeginQueryEXT),
		EXTENSION(glEndQueryEXT),
		EXTENSION(glGetQueryivEXT),
		EXTENSION(glGetQueryObjectuivEXT),
		EXTENSION(glEGLImageTargetTexture2DOES),
		EXTENSION(glEGLImageTargetRenderbufferStorageOES),

		#undef EXTENSION
	};

	for(int ext = 0; ext < sizeof(glExtensions) / sizeof(Extension); ext++)
	{
		if(strcmp(procname, glExtensions[ext].name) == 0)
		{
			return (__eglMustCastToProperFunctionPointerType)glExtensions[ext].address;
		}
	}

	return NULL;
}

void GL_APIENTRY Register(const char *licenseKey)
{
	RegisterLicenseKey(licenseKey);
}

}