src/OpenGL/libGLES_CM/libGLES_CM.cpp

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

// libGLES_CM.cpp: Implements the exported OpenGL ES 1.1 functions.

#include "main.h"
#include "mathutil.h"
#include "utilities.h"
#include "Buffer.h"
#include "Context.h"
#include "Framebuffer.h"
#include "Renderbuffer.h"
#include "Texture.h"
#include "common/debug.h"
#include "Common/SharedLibrary.hpp"
#include "Common/Version.h"

#include <EGL/egl.h>
#include <EGL/eglext.h>

#include <GLES/gl.h>
#include <GLES/glext.h>

#include <algorithm>
#include <limits>

namespace es1
{

static bool validImageSize(GLint level, GLsizei width, GLsizei height)
{
	if(level < 0 || level >= es1::IMPLEMENTATION_MAX_TEXTURE_LEVELS || width < 0 || height < 0)
	{
		return false;
	}

	return true;
}

void GL_APIENTRY ActiveTexture(GLenum texture)
{
	TRACE("(GLenum texture = 0x%X)", texture);

	es1::Context *context = es1::getContext();

	if(context)
	{
		if(texture < GL_TEXTURE0 || texture > GL_TEXTURE0 + es1::MAX_TEXTURE_UNITS - 1)
		{
			return error(GL_INVALID_ENUM);
		}

		context->setActiveSampler(texture - GL_TEXTURE0);
	}
}

void GL_APIENTRY AlphaFunc(GLenum func, GLclampf ref)
{
	TRACE("(GLenum func = 0x%X, GLclampf ref = %f)", func, ref);

	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);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->setAlphaFunc(func, clamp01(ref));
	}
}

void GL_APIENTRY AlphaFuncx(GLenum func, GLclampx ref)
{
	AlphaFunc(func, (float)ref / 0x10000);
}

void GL_APIENTRY BindBuffer(GLenum target, GLuint buffer)
{
	TRACE("(GLenum target = 0x%X, GLuint buffer = %d)", target, buffer);

	es1::Context *context = es1::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 BindFramebuffer(GLenum target, GLuint framebuffer)
{
	TRACE("(GLenum target = 0x%X, GLuint framebuffer = %d)", target, framebuffer);

	if(target != GL_FRAMEBUFFER_OES)
	{
		return error(GL_INVALID_ENUM);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->bindFramebuffer(framebuffer);
	}
}

void GL_APIENTRY BindFramebufferOES(GLenum target, GLuint framebuffer)
{
	TRACE("(GLenum target = 0x%X, GLuint framebuffer = %d)", target, framebuffer);

	if(target != GL_FRAMEBUFFER_OES)
	{
		return error(GL_INVALID_ENUM);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->bindFramebuffer(framebuffer);
	}
}

void GL_APIENTRY BindRenderbufferOES(GLenum target, GLuint renderbuffer)
{
	TRACE("(GLenum target = 0x%X, GLuint renderbuffer = %d)", target, renderbuffer);

	if(target != GL_RENDERBUFFER_OES)
	{
		return error(GL_INVALID_ENUM);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		// [GL_EXT_framebuffer_object]
		// If <renderbuffer> is not zero, then the resulting renderbuffer object
		// is a new state vector, initialized with a zero-sized memory buffer
		context->bindRenderbuffer(renderbuffer);
	}
}

void GL_APIENTRY BindTexture(GLenum target, GLuint texture)
{
	TRACE("(GLenum target = 0x%X, GLuint texture = %d)", target, texture);

	es1::Context *context = es1::getContext();

	if(context)
	{
		es1::Texture *textureObject = context->getTexture(texture);

		if(textureObject && textureObject->getTarget() != target && texture != 0)
		{
			return error(GL_INVALID_OPERATION);
		}

		switch(target)
		{
		case GL_TEXTURE_2D:
			context->bindTexture(TEXTURE_2D, texture);
			break;
		case GL_TEXTURE_EXTERNAL_OES:
			context->bindTexture(TEXTURE_EXTERNAL, texture);
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY BlendEquationSeparateOES(GLenum modeRGB, GLenum modeAlpha);

void GL_APIENTRY BlendEquationOES(GLenum mode)
{
	BlendEquationSeparateOES(mode, mode);
}

void GL_APIENTRY BlendEquationSeparateOES(GLenum modeRGB, GLenum modeAlpha)
{
	TRACE("(GLenum modeRGB = 0x%X, GLenum modeAlpha = 0x%X)", modeRGB, modeAlpha);

	switch(modeRGB)
	{
	case GL_FUNC_ADD_OES:
	case GL_FUNC_SUBTRACT_OES:
	case GL_FUNC_REVERSE_SUBTRACT_OES:
	case GL_MIN_EXT:
	case GL_MAX_EXT:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	switch(modeAlpha)
	{
	case GL_FUNC_ADD_OES:
	case GL_FUNC_SUBTRACT_OES:
	case GL_FUNC_REVERSE_SUBTRACT_OES:
	case GL_MIN_EXT:
	case GL_MAX_EXT:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->setBlendEquation(modeRGB, modeAlpha);
	}
}

void GL_APIENTRY BlendFuncSeparateOES(GLenum srcRGB, GLenum dstRGB, GLenum srcAlpha, GLenum dstAlpha);

void GL_APIENTRY BlendFunc(GLenum sfactor, GLenum dfactor)
{
	BlendFuncSeparateOES(sfactor, dfactor, sfactor, dfactor);
}

void GL_APIENTRY BlendFuncSeparateOES(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_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:
		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_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:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->setBlendFactors(srcRGB, dstRGB, srcAlpha, dstAlpha);
	}
}

void GL_APIENTRY BufferData(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 = %p, GLenum usage = %d)",
	      target, size, data, usage);

	if(size < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	switch(usage)
	{
	case GL_STATIC_DRAW:
	case GL_DYNAMIC_DRAW:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		es1::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 BufferSubData(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 = %p)",
	      target, offset, size, data);

	if(size < 0 || offset < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	if(!data)
	{
		return;
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		es1::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 CheckFramebufferStatusOES(GLenum target)
{
	TRACE("(GLenum target = 0x%X)", target);

	if(target != GL_FRAMEBUFFER_OES)
	{
		return error(GL_INVALID_ENUM, 0);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		es1::Framebuffer *framebuffer = context->getFramebuffer();

		if(!framebuffer)
		{
			return GL_FRAMEBUFFER_UNDEFINED_OES;
		}

		return framebuffer->completeness();
	}

	return 0;
}

void GL_APIENTRY Clear(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);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->clear(mask);
	}
}

void GL_APIENTRY ClearColor(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);

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->setClearColor(red, green, blue, alpha);
	}
}

void GL_APIENTRY ClearColorx(GLclampx red, GLclampx green, GLclampx blue, GLclampx alpha)
{
	ClearColor((float)red / 0x10000, (float)green / 0x10000, (float)blue / 0x10000, (float)alpha / 0x10000);
}

void GL_APIENTRY ClearDepthf(GLclampf depth)
{
	TRACE("(GLclampf depth = %f)", depth);

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->setClearDepth(depth);
	}
}

void GL_APIENTRY ClearDepthx(GLclampx depth)
{
	ClearDepthf((float)depth / 0x10000);
}

void GL_APIENTRY ClearStencil(GLint s)
{
	TRACE("(GLint s = %d)", s);

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->setClearStencil(s);
	}
}

void GL_APIENTRY ClientActiveTexture(GLenum texture)
{
	TRACE("(GLenum texture = 0x%X)", texture);

	switch(texture)
	{
	case GL_TEXTURE0:
	case GL_TEXTURE1:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->clientActiveTexture(texture);
	}
}

void GL_APIENTRY ClipPlanef(GLenum plane, const GLfloat *equation)
{
	TRACE("(GLenum plane = 0x%X, const GLfloat *equation)", plane);

	int index = plane - GL_CLIP_PLANE0;

	if(index < 0 || index >= MAX_CLIP_PLANES)
	{
		return error(GL_INVALID_ENUM);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->setClipPlane(index, equation);
	}
}

void GL_APIENTRY ClipPlanex(GLenum plane, const GLfixed *equation)
{
	GLfloat equationf[4] =
	{
		(float)equation[0] / 0x10000,
		(float)equation[1] / 0x10000,
		(float)equation[2] / 0x10000,
		(float)equation[3] / 0x10000,
	};

	ClipPlanef(plane, equationf);
}

void GL_APIENTRY Color4f(GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha)
{
	TRACE("(GLfloat red = %f, GLfloat green = %f, GLfloat blue = %f, GLfloat alpha = %f)", red, green, blue, alpha);

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->setVertexAttrib(sw::Color0, red, green, blue, alpha);
	}
}

void GL_APIENTRY Color4ub(GLubyte red, GLubyte green, GLubyte blue, GLubyte alpha)
{
	Color4f((float)red / 0xFF, (float)green / 0xFF, (float)blue / 0xFF, (float)alpha / 0xFF);
}

void GL_APIENTRY Color4x(GLfixed red, GLfixed green, GLfixed blue, GLfixed alpha)
{
	Color4f((float)red / 0x10000, (float)green / 0x10000, (float)blue / 0x10000, (float)alpha / 0x10000);
}

void GL_APIENTRY ColorMask(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);

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->setColorMask(red != GL_FALSE, green != GL_FALSE, blue != GL_FALSE, alpha != GL_FALSE);
	}
}

void GL_APIENTRY VertexAttribPointer(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 = %p)",
	      index, size, type, normalized, stride, ptr);

	if(index >= es1::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);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->setVertexAttribState(index, context->getArrayBuffer(), size, type, (normalized != GL_FALSE), stride, ptr);
	}
}

void GL_APIENTRY ColorPointer(GLint size, GLenum type, GLsizei stride, const GLvoid *pointer)
{
	TRACE("(GLint size = %d, GLenum type = 0x%X, GLsizei stride = %d, const GLvoid *pointer = %p)", size, type, stride, pointer);

	if(size != 4)
	{
		return error(GL_INVALID_VALUE);
	}

	VertexAttribPointer(sw::Color0, size, type, true, stride, pointer);
}

void GL_APIENTRY CompressedTexImage2D(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 = %p)",
	      target, level, internalformat, width, height, border, imageSize, data);

	if(level < 0 || level >= es1::IMPLEMENTATION_MAX_TEXTURE_LEVELS)
	{
		return error(GL_INVALID_VALUE);
	}

	if(!validImageSize(level, width, height) || imageSize < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	switch(internalformat)
	{
	case GL_ETC1_RGB8_OES:
	case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
	case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
		break;
	case GL_DEPTH_COMPONENT16_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);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		switch(target)
		{
		case GL_TEXTURE_2D:
			if(width > (es1::IMPLEMENTATION_MAX_TEXTURE_SIZE >> level) ||
			   height > (es1::IMPLEMENTATION_MAX_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)
		{
			es1::Texture2D *texture = context->getTexture2D();

			if(!texture)
			{
				return error(GL_INVALID_OPERATION);
			}

			texture->setCompressedImage(level, internalformat, width, height, imageSize, data);
		}
		else UNREACHABLE(target);
	}
}

void GL_APIENTRY CompressedTexSubImage2D(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 = %p)",
	      target, level, xoffset, yoffset, width, height, format, imageSize, data);

	if(!es1::IsTextureTarget(target))
	{
		return error(GL_INVALID_ENUM);
	}

	if(level < 0 || level >= es1::IMPLEMENTATION_MAX_TEXTURE_LEVELS)
	{
		return error(GL_INVALID_VALUE);
	}

	if(xoffset < 0 || yoffset < 0 || !validImageSize(level, width, height) || imageSize < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	switch(format)
	{
	case GL_ETC1_RGB8_OES:
	case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
	case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	if(width == 0 || height == 0 || !data)
	{
		return;
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		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)
		{
			es1::Texture2D *texture = context->getTexture2D();

			GLenum validationError = ValidateSubImageParams(true, false, target, level, xoffset, yoffset, width, height, format, GL_NONE_OES, texture);
			if(validationError != GL_NO_ERROR)
			{
				return error(validationError);
			}

			texture->subImageCompressed(level, xoffset, yoffset, width, height, format, imageSize, data);
		}
		else UNREACHABLE(target);
	}
}

void GL_APIENTRY CopyTexImage2D(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);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		switch(target)
		{
		case GL_TEXTURE_2D:
			if(width > (es1::IMPLEMENTATION_MAX_TEXTURE_SIZE >> level) ||
			   height > (es1::IMPLEMENTATION_MAX_TEXTURE_SIZE >> level))
			{
				return error(GL_INVALID_VALUE);
			}
			break;
		default:
			return error(GL_INVALID_ENUM);
		}

		es1::Framebuffer *framebuffer = context->getFramebuffer();

		if(!framebuffer || (framebuffer->completeness() != GL_FRAMEBUFFER_COMPLETE_OES))
		{
			return error(GL_INVALID_FRAMEBUFFER_OPERATION_OES);
		}

		es1::Renderbuffer *source = framebuffer->getColorbuffer();

		if(!source || source->getSamples() > 1)
		{
			return error(GL_INVALID_OPERATION);
		}

		GLenum colorbufferFormat = source->getFormat();

		// [OpenGL ES 1.1.12] table 3.9
		switch(internalformat)
		{
		case GL_ALPHA:
			if(colorbufferFormat != GL_ALPHA &&
			   colorbufferFormat != GL_RGBA &&
			   colorbufferFormat != GL_RGBA4_OES &&
			   colorbufferFormat != GL_RGB5_A1_OES &&
			   colorbufferFormat != GL_RGBA8_OES)
			{
				return error(GL_INVALID_OPERATION);
			}
			break;
		case GL_LUMINANCE:
		case GL_RGB:
			if(colorbufferFormat != GL_RGB &&
			   colorbufferFormat != GL_RGB565_OES &&
			   colorbufferFormat != GL_RGB8_OES &&
			   colorbufferFormat != GL_RGBA &&
			   colorbufferFormat != GL_RGBA4_OES &&
			   colorbufferFormat != GL_RGB5_A1_OES &&
			   colorbufferFormat != GL_RGBA8_OES)
			{
				return error(GL_INVALID_OPERATION);
			}
			break;
		case GL_LUMINANCE_ALPHA:
		case GL_RGBA:
			if(colorbufferFormat != GL_RGBA &&
			   colorbufferFormat != GL_RGBA4_OES &&
			   colorbufferFormat != GL_RGB5_A1_OES &&
			   colorbufferFormat != GL_RGBA8_OES &&
			   colorbufferFormat != GL_BGRA_EXT &&  // GL_EXT_texture_format_BGRA8888
			   colorbufferFormat != GL_BGRA8_EXT)   // GL_EXT_texture_format_BGRA8888
			{
				return error(GL_INVALID_OPERATION);
			}
			break;
		case GL_ETC1_RGB8_OES:
		case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
		case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
			return error(GL_INVALID_OPERATION);
		case GL_BGRA_EXT:   // GL_EXT_texture_format_BGRA8888 doesn't mention the format to be accepted by glCopyTexImage2D.
		default:
			return error(GL_INVALID_ENUM);
		}

		// Determine the sized internal format.
		if(gl::GetBaseInternalFormat(colorbufferFormat) == internalformat)
		{
			internalformat = colorbufferFormat;
		}
		else if(GetRedSize(colorbufferFormat) <= 8)
		{
			internalformat = gl::GetSizedInternalFormat(internalformat, GL_UNSIGNED_BYTE);
		}
		else
		{
			UNIMPLEMENTED();

			return error(GL_INVALID_OPERATION);
		}

		if(target == GL_TEXTURE_2D)
		{
			es1::Texture2D *texture = context->getTexture2D();

			if(!texture)
			{
				return error(GL_INVALID_OPERATION);
			}

			texture->copyImage(level, internalformat, x, y, width, height, framebuffer);
		}
		else UNREACHABLE(target);
	}
}

void GL_APIENTRY CopyTexSubImage2D(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(!es1::IsTextureTarget(target))
	{
		return error(GL_INVALID_ENUM);
	}

	if(level < 0 || level >= es1::IMPLEMENTATION_MAX_TEXTURE_LEVELS)
	{
		return error(GL_INVALID_VALUE);
	}

	if(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;
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		es1::Framebuffer *framebuffer = context->getFramebuffer();

		if(!framebuffer || (framebuffer->completeness() != GL_FRAMEBUFFER_COMPLETE_OES))
		{
			return error(GL_INVALID_FRAMEBUFFER_OPERATION_OES);
		}

		es1::Renderbuffer *source = framebuffer->getColorbuffer();

		if(context->getFramebufferName() != 0 && (!source || source->getSamples() > 1))
		{
			return error(GL_INVALID_OPERATION);
		}

		es1::Texture *texture = nullptr;

		if(target == GL_TEXTURE_2D)
		{
			texture = context->getTexture2D();
		}
		else UNREACHABLE(target);

		GLenum validationError = ValidateSubImageParams(false, true, target, level, xoffset, yoffset, width, height, GL_NONE_OES, GL_NONE_OES, texture);
		if(validationError != GL_NO_ERROR)
		{
			return error(validationError);
		}

		texture->copySubImage(target, level, xoffset, yoffset, x, y, width, height, framebuffer);
	}
}

void GL_APIENTRY CullFace(GLenum mode)
{
	TRACE("(GLenum mode = 0x%X)", mode);

	switch(mode)
	{
	case GL_FRONT:
	case GL_BACK:
	case GL_FRONT_AND_BACK:
		{
			es1::Context *context = es1::getContext();

			if(context)
			{
				context->setCullMode(mode);
			}
		}
		break;
	default:
		return error(GL_INVALID_ENUM);
	}
}

void GL_APIENTRY DeleteBuffers(GLsizei n, const GLuint* buffers)
{
	TRACE("(GLsizei n = %d, const GLuint* buffers = %p)", n, buffers);

	if(n < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		for(int i = 0; i < n; i++)
		{
			context->deleteBuffer(buffers[i]);
		}
	}
}

void GL_APIENTRY DeleteFramebuffersOES(GLsizei n, const GLuint* framebuffers)
{
	TRACE("(GLsizei n = %d, const GLuint* framebuffers = %p)", n, framebuffers);

	if(n < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		for(int i = 0; i < n; i++)
		{
			if(framebuffers[i] != 0)
			{
				context->deleteFramebuffer(framebuffers[i]);
			}
		}
	}
}

void GL_APIENTRY DeleteRenderbuffersOES(GLsizei n, const GLuint* renderbuffers)
{
	TRACE("(GLsizei n = %d, const GLuint* renderbuffers = %p)", n, renderbuffers);

	if(n < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		for(int i = 0; i < n; i++)
		{
			context->deleteRenderbuffer(renderbuffers[i]);
		}
	}
}

void GL_APIENTRY DeleteTextures(GLsizei n, const GLuint* textures)
{
	TRACE("(GLsizei n = %d, const GLuint* textures = %p)", n, textures);

	if(n < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		for(int i = 0; i < n; i++)
		{
			if(textures[i] != 0)
			{
				context->deleteTexture(textures[i]);
			}
		}
	}
}

void GL_APIENTRY DepthFunc(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);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->setDepthFunc(func);
	}
}

void GL_APIENTRY DepthMask(GLboolean flag)
{
	TRACE("(GLboolean flag = %d)", flag);

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->setDepthMask(flag != GL_FALSE);
	}
}

void GL_APIENTRY DepthRangef(GLclampf zNear, GLclampf zFar)
{
	TRACE("(GLclampf zNear = %f, GLclampf zFar = %f)", zNear, zFar);

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->setDepthRange(zNear, zFar);
	}
}

void GL_APIENTRY DepthRangex(GLclampx zNear, GLclampx zFar)
{
	DepthRangef((float)zNear / 0x10000, (float)zFar / 0x10000);
}

void GL_APIENTRY Disable(GLenum cap)
{
	TRACE("(GLenum cap = 0x%X)", cap);

	es1::Context *context = es1::getContext();

	if(context)
	{
		switch(cap)
		{
		case GL_CULL_FACE:                context->setCullFaceEnabled(false);              break;
		case GL_POLYGON_OFFSET_FILL:      context->setPolygonOffsetFillEnabled(false);     break;
		case GL_SAMPLE_ALPHA_TO_COVERAGE: context->setSampleAlphaToCoverageEnabled(false); break;
		case GL_SAMPLE_COVERAGE:          context->setSampleCoverageEnabled(false);        break;
		case GL_SCISSOR_TEST:             context->setScissorTestEnabled(false);           break;
		case GL_STENCIL_TEST:             context->setStencilTestEnabled(false);           break;
		case GL_DEPTH_TEST:               context->setDepthTestEnabled(false);             break;
		case GL_BLEND:                    context->setBlendEnabled(false);                 break;
		case GL_DITHER:                   context->setDitherEnabled(false);                break;
		case GL_LIGHTING:                 context->setLightingEnabled(false);              break;
		case GL_LIGHT0:                   context->setLightEnabled(0, false);              break;
		case GL_LIGHT1:                   context->setLightEnabled(1, false);              break;
		case GL_LIGHT2:                   context->setLightEnabled(2, false);              break;
		case GL_LIGHT3:                   context->setLightEnabled(3, false);              break;
		case GL_LIGHT4:                   context->setLightEnabled(4, false);              break;
		case GL_LIGHT5:                   context->setLightEnabled(5, false);              break;
		case GL_LIGHT6:                   context->setLightEnabled(6, false);              break;
		case GL_LIGHT7:                   context->setLightEnabled(7, false);              break;
		case GL_FOG:                      context->setFogEnabled(false);                   break;
		case GL_TEXTURE_2D:               context->setTexture2Denabled(false);             break;
		case GL_TEXTURE_EXTERNAL_OES:     context->setTextureExternalEnabled(false);       break;
		case GL_ALPHA_TEST:               context->setAlphaTestEnabled(false);             break;
		case GL_COLOR_LOGIC_OP:           context->setColorLogicOpEnabled(false);          break;
		case GL_POINT_SMOOTH:             context->setPointSmoothEnabled(false);           break;
		case GL_LINE_SMOOTH:              context->setLineSmoothEnabled(false);            break;
		case GL_COLOR_MATERIAL:           context->setColorMaterialEnabled(false);         break;
		case GL_NORMALIZE:                context->setNormalizeEnabled(false);             break;
		case GL_RESCALE_NORMAL:           context->setRescaleNormalEnabled(false);         break;
		case GL_VERTEX_ARRAY:             context->setVertexArrayEnabled(false);           break;
		case GL_NORMAL_ARRAY:             context->setNormalArrayEnabled(false);           break;
		case GL_COLOR_ARRAY:              context->setColorArrayEnabled(false);            break;
		case GL_POINT_SIZE_ARRAY_OES:     context->setPointSizeArrayEnabled(false);        break;
		case GL_TEXTURE_COORD_ARRAY:      context->setTextureCoordArrayEnabled(false);     break;
		case GL_MULTISAMPLE:              context->setMultisampleEnabled(false);           break;
		case GL_SAMPLE_ALPHA_TO_ONE:      context->setSampleAlphaToOneEnabled(false);      break;
		case GL_CLIP_PLANE0:              context->setClipPlaneEnabled(0, false);          break;
		case GL_CLIP_PLANE1:              context->setClipPlaneEnabled(1, false);          break;
		case GL_CLIP_PLANE2:              context->setClipPlaneEnabled(2, false);          break;
		case GL_CLIP_PLANE3:              context->setClipPlaneEnabled(3, false);          break;
		case GL_CLIP_PLANE4:              context->setClipPlaneEnabled(4, false);          break;
		case GL_CLIP_PLANE5:              context->setClipPlaneEnabled(5, false);          break;
		case GL_POINT_SPRITE_OES:         context->setPointSpriteEnabled(false);           break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY DisableClientState(GLenum array)
{
	TRACE("(GLenum array = 0x%X)", array);

	switch(array)
	{
	case GL_VERTEX_ARRAY:
	case GL_NORMAL_ARRAY:
	case GL_COLOR_ARRAY:
	case GL_POINT_SIZE_ARRAY_OES:
	case GL_TEXTURE_COORD_ARRAY:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		GLenum texture = context->getClientActiveTexture();

		switch(array)
		{
		case GL_VERTEX_ARRAY:         context->setVertexAttribArrayEnabled(sw::Position, false);                            break;
		case GL_NORMAL_ARRAY:         context->setVertexAttribArrayEnabled(sw::Normal, false);                              break;
		case GL_COLOR_ARRAY:          context->setVertexAttribArrayEnabled(sw::Color0, false);                              break;
		case GL_POINT_SIZE_ARRAY_OES: context->setVertexAttribArrayEnabled(sw::PointSize, false);                           break;
		case GL_TEXTURE_COORD_ARRAY:  context->setVertexAttribArrayEnabled(sw::TexCoord0 + (texture - GL_TEXTURE0), false); break;
		default:                      UNREACHABLE(array);
		}
	}
}

void GL_APIENTRY DrawArrays(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);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->drawArrays(mode, first, count);
	}
}

void GL_APIENTRY DrawElements(GLenum mode, GLsizei count, GLenum type, const GLvoid* indices)
{
	TRACE("(GLenum mode = 0x%X, GLsizei count = %d, GLenum type = 0x%X, const GLvoid* indices = %p)",
	      mode, count, type, indices);

	if(count < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	es1::Context *context = es1::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 Enable(GLenum cap)
{
	TRACE("(GLenum cap = 0x%X)", cap);

	es1::Context *context = es1::getContext();

	if(context)
	{
		switch(cap)
		{
		case GL_CULL_FACE:                context->setCullFaceEnabled(true);              break;
		case GL_POLYGON_OFFSET_FILL:      context->setPolygonOffsetFillEnabled(true);     break;
		case GL_SAMPLE_ALPHA_TO_COVERAGE: context->setSampleAlphaToCoverageEnabled(true); break;
		case GL_SAMPLE_COVERAGE:          context->setSampleCoverageEnabled(true);        break;
		case GL_SCISSOR_TEST:             context->setScissorTestEnabled(true);           break;
		case GL_STENCIL_TEST:             context->setStencilTestEnabled(true);           break;
		case GL_DEPTH_TEST:               context->setDepthTestEnabled(true);             break;
		case GL_BLEND:                    context->setBlendEnabled(true);                 break;
		case GL_DITHER:                   context->setDitherEnabled(true);                break;
		case GL_LIGHTING:                 context->setLightingEnabled(true);              break;
		case GL_LIGHT0:                   context->setLightEnabled(0, true);              break;
		case GL_LIGHT1:                   context->setLightEnabled(1, true);              break;
		case GL_LIGHT2:                   context->setLightEnabled(2, true);              break;
		case GL_LIGHT3:                   context->setLightEnabled(3, true);              break;
		case GL_LIGHT4:                   context->setLightEnabled(4, true);              break;
		case GL_LIGHT5:                   context->setLightEnabled(5, true);              break;
		case GL_LIGHT6:                   context->setLightEnabled(6, true);              break;
		case GL_LIGHT7:                   context->setLightEnabled(7, true);              break;
		case GL_FOG:                      context->setFogEnabled(true);                   break;
		case GL_TEXTURE_2D:               context->setTexture2Denabled(true);             break;
		case GL_TEXTURE_EXTERNAL_OES:     context->setTextureExternalEnabled(true);       break;
		case GL_ALPHA_TEST:               context->setAlphaTestEnabled(true);             break;
		case GL_COLOR_LOGIC_OP:           context->setColorLogicOpEnabled(true);          break;
		case GL_POINT_SMOOTH:             context->setPointSmoothEnabled(true);           break;
		case GL_LINE_SMOOTH:              context->setLineSmoothEnabled(true);            break;
		case GL_COLOR_MATERIAL:           context->setColorMaterialEnabled(true);         break;
		case GL_NORMALIZE:                context->setNormalizeEnabled(true);             break;
		case GL_RESCALE_NORMAL:           context->setRescaleNormalEnabled(true);         break;
		case GL_VERTEX_ARRAY:             context->setVertexArrayEnabled(true);           break;
		case GL_NORMAL_ARRAY:             context->setNormalArrayEnabled(true);           break;
		case GL_COLOR_ARRAY:              context->setColorArrayEnabled(true);            break;
		case GL_POINT_SIZE_ARRAY_OES:     context->setPointSizeArrayEnabled(true);        break;
		case GL_TEXTURE_COORD_ARRAY:      context->setTextureCoordArrayEnabled(true);     break;
		case GL_MULTISAMPLE:              context->setMultisampleEnabled(true);           break;
		case GL_SAMPLE_ALPHA_TO_ONE:      context->setSampleAlphaToOneEnabled(true);      break;
		case GL_CLIP_PLANE0:              context->setClipPlaneEnabled(0, true);          break;
		case GL_CLIP_PLANE1:              context->setClipPlaneEnabled(1, true);          break;
		case GL_CLIP_PLANE2:              context->setClipPlaneEnabled(2, true);          break;
		case GL_CLIP_PLANE3:              context->setClipPlaneEnabled(3, true);          break;
		case GL_CLIP_PLANE4:              context->setClipPlaneEnabled(4, true);          break;
		case GL_CLIP_PLANE5:              context->setClipPlaneEnabled(5, true);          break;
		case GL_POINT_SPRITE_OES:         context->setPointSpriteEnabled(true);           break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY EnableClientState(GLenum array)
{
	TRACE("(GLenum array = 0x%X)", array);

	switch(array)
	{
	case GL_VERTEX_ARRAY:
	case GL_NORMAL_ARRAY:
	case GL_COLOR_ARRAY:
	case GL_POINT_SIZE_ARRAY_OES:
	case GL_TEXTURE_COORD_ARRAY:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		GLenum texture = context->getClientActiveTexture();

		switch(array)
		{
		case GL_VERTEX_ARRAY:         context->setVertexAttribArrayEnabled(sw::Position, true);                            break;
		case GL_NORMAL_ARRAY:         context->setVertexAttribArrayEnabled(sw::Normal, true);                              break;
		case GL_COLOR_ARRAY:          context->setVertexAttribArrayEnabled(sw::Color0, true);                              break;
		case GL_POINT_SIZE_ARRAY_OES: context->setVertexAttribArrayEnabled(sw::PointSize, true);                           break;
		case GL_TEXTURE_COORD_ARRAY:  context->setVertexAttribArrayEnabled(sw::TexCoord0 + (texture - GL_TEXTURE0), true); break;
		default:                      UNREACHABLE(array);
		}
	}
}

void GL_APIENTRY Finish(void)
{
	TRACE("()");

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->finish();
	}
}

void GL_APIENTRY Flush(void)
{
	TRACE("()");

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->flush();
	}
}

void GL_APIENTRY FramebufferRenderbufferOES(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_OES || (renderbuffertarget != GL_RENDERBUFFER_OES && renderbuffer != 0))
	{
		return error(GL_INVALID_ENUM);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		es1::Framebuffer *framebuffer = context->getFramebuffer();
		GLuint framebufferName = context->getFramebufferName();

		if(!framebuffer || (framebufferName == 0 && renderbuffer != 0))
		{
			return error(GL_INVALID_OPERATION);
		}

		switch(attachment)
		{
		case GL_COLOR_ATTACHMENT0_OES:
			framebuffer->setColorbuffer(GL_RENDERBUFFER_OES, renderbuffer);
			break;
		case GL_DEPTH_ATTACHMENT_OES:
			framebuffer->setDepthbuffer(GL_RENDERBUFFER_OES, renderbuffer);
			break;
		case GL_STENCIL_ATTACHMENT_OES:
			framebuffer->setStencilbuffer(GL_RENDERBUFFER_OES, renderbuffer);
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY FramebufferTexture2DOES(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_OES)
	{
		return error(GL_INVALID_ENUM);
	}

	switch(attachment)
	{
	case GL_COLOR_ATTACHMENT0_OES:
	case GL_DEPTH_ATTACHMENT_OES:
	case GL_STENCIL_ATTACHMENT_OES:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		if(texture == 0)
		{
			textarget = GL_NONE_OES;
		}
		else
		{
			es1::Texture *tex = context->getTexture(texture);

			if(!tex)
			{
				return error(GL_INVALID_OPERATION);
			}

			switch(textarget)
			{
			case GL_TEXTURE_2D:
				if(tex->getTarget() != GL_TEXTURE_2D)
				{
					return error(GL_INVALID_OPERATION);
				}
				break;
			default:
				return error(GL_INVALID_ENUM);
			}

			if((level < 0) || (level >= es1::IMPLEMENTATION_MAX_TEXTURE_LEVELS))
			{
				return error(GL_INVALID_VALUE);
			}

			if(tex->isCompressed(textarget, level))
			{
				return error(GL_INVALID_OPERATION);
			}
		}

		es1::Framebuffer *framebuffer = context->getFramebuffer();
		GLuint framebufferName = context->getFramebufferName();

		if(framebufferName == 0 || !framebuffer)
		{
			return error(GL_INVALID_OPERATION);
		}

		switch(attachment)
		{
		case GL_COLOR_ATTACHMENT0_OES:  framebuffer->setColorbuffer(textarget, texture, level);   break;
		case GL_DEPTH_ATTACHMENT_OES:   framebuffer->setDepthbuffer(textarget, texture, level);   break;
		case GL_STENCIL_ATTACHMENT_OES: framebuffer->setStencilbuffer(textarget, texture, level); break;
		}
	}
}

void GL_APIENTRY Fogf(GLenum pname, GLfloat param)
{
	TRACE("(GLenum pname = 0x%X, GLfloat param = %f)", pname, param);

	es1::Context *context = es1::getContext();

	if(context)
	{
		switch(pname)
		{
		case GL_FOG_MODE:
			switch((GLenum)param)
			{
			case GL_LINEAR:
			case GL_EXP:
			case GL_EXP2:
				context->setFogMode((GLenum)param);
				break;
			default:
				return error(GL_INVALID_ENUM);
			}
			break;
		case GL_FOG_DENSITY:
			if(param < 0)
			{
				return error(GL_INVALID_VALUE);
			}
			context->setFogDensity(param);
			break;
		case GL_FOG_START:
			context->setFogStart(param);
			break;
		case GL_FOG_END:
			context->setFogEnd(param);
			break;
		case GL_FOG_COLOR:
			return error(GL_INVALID_ENUM);   // Need four values, should call glFogfv() instead
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY Fogfv(GLenum pname, const GLfloat *params)
{
	TRACE("(GLenum pname = 0x%X, const GLfloat *params)", pname);

	es1::Context *context = es1::getContext();

	if(context)
	{
		switch(pname)
		{
		case GL_FOG_MODE:
			switch((GLenum)params[0])
			{
			case GL_LINEAR:
			case GL_EXP:
			case GL_EXP2:
				context->setFogMode((GLenum)params[0]);
				break;
			default:
				return error(GL_INVALID_ENUM);
			}
			break;
		case GL_FOG_DENSITY:
			if(params[0] < 0)
			{
				return error(GL_INVALID_VALUE);
			}
			context->setFogDensity(params[0]);
			break;
		case GL_FOG_START:
			context->setFogStart(params[0]);
			break;
		case GL_FOG_END:
			context->setFogEnd(params[0]);
			break;
		case GL_FOG_COLOR:
			context->setFogColor(params[0], params[1], params[2], params[3]);
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY Fogx(GLenum pname, GLfixed param)
{
	TRACE("(GLenum pname = 0x%X, GLfixed param = %d)", pname, param);

	es1::Context *context = es1::getContext();

	if(context)
	{
		switch(pname)
		{
		case GL_FOG_MODE:
			switch((GLenum)param)
			{
			case GL_LINEAR:
			case GL_EXP:
			case GL_EXP2:
				context->setFogMode((GLenum)param);
				break;
			default:
				return error(GL_INVALID_ENUM);
			}
			break;
		case GL_FOG_DENSITY:
			if(param < 0)
			{
				return error(GL_INVALID_VALUE);
			}
			context->setFogDensity((float)param / 0x10000);
			break;
		case GL_FOG_START:
			context->setFogStart((float)param / 0x10000);
			break;
		case GL_FOG_END:
			context->setFogEnd((float)param / 0x10000);
			break;
		case GL_FOG_COLOR:
			return error(GL_INVALID_ENUM);   // Need four values, should call glFogxv() instead
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY Fogxv(GLenum pname, const GLfixed *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY FrontFace(GLenum mode)
{
	TRACE("(GLenum mode = 0x%X)", mode);

	switch(mode)
	{
	case GL_CW:
	case GL_CCW:
		{
			es1::Context *context = es1::getContext();

			if(context)
			{
				context->setFrontFace(mode);
			}
		}
		break;
	default:
		return error(GL_INVALID_ENUM);
	}
}

void GL_APIENTRY Frustumf(GLfloat left, GLfloat right, GLfloat bottom, GLfloat top, GLfloat zNear, GLfloat zFar)
{
	TRACE("(GLfloat left = %f, GLfloat right = %f, GLfloat bottom = %f, GLfloat top = %f, GLfloat zNear = %f, GLfloat zFar = %f)", left, right, bottom, top, zNear, zFar);

	if(zNear <= 0.0f || zFar <= 0.0f || left == right || bottom == top || zNear == zFar)
	{
		return error(GL_INVALID_VALUE);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->frustum(left, right, bottom, top, zNear, zFar);
	}
}

void GL_APIENTRY Frustumx(GLfixed left, GLfixed right, GLfixed bottom, GLfixed top, GLfixed zNear, GLfixed zFar)
{
	Frustumf((float)left / 0x10000, (float)right / 0x10000, (float)bottom / 0x10000, (float)top / 0x10000, (float)zNear / 0x10000, (float)zFar / 0x10000);
}

void GL_APIENTRY GenerateMipmapOES(GLenum target)
{
	TRACE("(GLenum target = 0x%X)", target);

	es1::Context *context = es1::getContext();

	if(context)
	{
		es1::Texture *texture;

		switch(target)
		{
		case GL_TEXTURE_2D:
			texture = context->getTexture2D();
			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 GenBuffers(GLsizei n, GLuint* buffers)
{
	TRACE("(GLsizei n = %d, GLuint* buffers = %p)", n, buffers);

	if(n < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		for(int i = 0; i < n; i++)
		{
			buffers[i] = context->createBuffer();
		}
	}
}

void GL_APIENTRY GenFramebuffersOES(GLsizei n, GLuint* framebuffers)
{
	TRACE("(GLsizei n = %d, GLuint* framebuffers = %p)", n, framebuffers);

	if(n < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		for(int i = 0; i < n; i++)
		{
			framebuffers[i] = context->createFramebuffer();
		}
	}
}

void GL_APIENTRY GenRenderbuffersOES(GLsizei n, GLuint* renderbuffers)
{
	TRACE("(GLsizei n = %d, GLuint* renderbuffers = %p)", n, renderbuffers);

	if(n < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		for(int i = 0; i < n; i++)
		{
			renderbuffers[i] = context->createRenderbuffer();
		}
	}
}

void GL_APIENTRY GenTextures(GLsizei n, GLuint* textures)
{
	TRACE("(GLsizei n = %d, GLuint* textures =  %p)", n, textures);

	if(n < 0)
	{
		return error(GL_INVALID_VALUE);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		for(int i = 0; i < n; i++)
		{
			textures[i] = context->createTexture();
		}
	}
}

void GL_APIENTRY GetRenderbufferParameterivOES(GLenum target, GLenum pname, GLint* params)
{
	TRACE("(GLenum target = 0x%X, GLenum pname = 0x%X, GLint* params = %p)", target, pname, params);

	es1::Context *context = es1::getContext();

	if(context)
	{
		if(target != GL_RENDERBUFFER_OES)
		{
			return error(GL_INVALID_ENUM);
		}

		if(context->getRenderbufferName() == 0)
		{
			return error(GL_INVALID_OPERATION);
		}

		es1::Renderbuffer *renderbuffer = context->getRenderbuffer(context->getRenderbufferName());

		switch(pname)
		{
		case GL_RENDERBUFFER_WIDTH_OES:           *params = renderbuffer->getWidth();       break;
		case GL_RENDERBUFFER_HEIGHT_OES:          *params = renderbuffer->getHeight();      break;
		case GL_RENDERBUFFER_INTERNAL_FORMAT_OES:
			{
				GLint internalformat = renderbuffer->getFormat();
				*params = (internalformat == GL_NONE_OES) ? GL_RGBA4_OES : internalformat;
			}
			break;
		case GL_RENDERBUFFER_RED_SIZE_OES:        *params = renderbuffer->getRedSize();     break;
		case GL_RENDERBUFFER_GREEN_SIZE_OES:      *params = renderbuffer->getGreenSize();   break;
		case GL_RENDERBUFFER_BLUE_SIZE_OES:       *params = renderbuffer->getBlueSize();    break;
		case GL_RENDERBUFFER_ALPHA_SIZE_OES:      *params = renderbuffer->getAlphaSize();   break;
		case GL_RENDERBUFFER_DEPTH_SIZE_OES:      *params = renderbuffer->getDepthSize();   break;
		case GL_RENDERBUFFER_STENCIL_SIZE_OES:    *params = renderbuffer->getStencilSize(); break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY GetBooleanv(GLenum pname, GLboolean* params)
{
	TRACE("(GLenum pname = 0x%X, GLboolean* params = %p)",  pname, params);

	es1::Context *context = es1::getContext();

	if(context)
	{
		if(!(context->getBooleanv(pname, params)))
		{
			int numParams = context->getQueryParameterNum(pname);

			if(numParams < 0)
			{
				return error(GL_INVALID_ENUM);
			}

			if(numParams == 0)
			{
				return;
			}

			if(context->isQueryParameterFloat(pname))
			{
				GLfloat *floatParams = nullptr;
				floatParams = new GLfloat[numParams];

				context->getFloatv(pname, floatParams);

				for(int i = 0; i < numParams; ++i)
				{
					if(floatParams[i] == 0.0f)
						params[i] = GL_FALSE;
					else
						params[i] = GL_TRUE;
				}

				delete [] floatParams;
			}
			else if(context->isQueryParameterInt(pname))
			{
				GLint *intParams = nullptr;
				intParams = new GLint[numParams];

				context->getIntegerv(pname, intParams);

				for(int i = 0; i < numParams; ++i)
				{
					if(intParams[i] == 0)
						params[i] = GL_FALSE;
					else
						params[i] = GL_TRUE;
				}

				delete [] intParams;
			}
			else UNREACHABLE(pname);
		}
	}
}

void GL_APIENTRY GetBufferParameteriv(GLenum target, GLenum pname, GLint* params)
{
	TRACE("(GLenum target = 0x%X, GLenum pname = 0x%X, GLint* params = %p)", target, pname, params);

	es1::Context *context = es1::getContext();

	if(context)
	{
		es1::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 = (GLint)buffer->size();
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY GetClipPlanef(GLenum pname, GLfloat eqn[4])
{
	UNIMPLEMENTED();
}

void GL_APIENTRY GetClipPlanex(GLenum pname, GLfixed eqn[4])
{
	UNIMPLEMENTED();
}

GLenum GL_APIENTRY GetError(void)
{
	TRACE("()");

	es1::Context *context = es1::getContext();

	if(context)
	{
		return context->getError();
	}

	return GL_NO_ERROR;
}

void GL_APIENTRY GetFixedv(GLenum pname, GLfixed *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY GetFloatv(GLenum pname, GLfloat* params)
{
	TRACE("(GLenum pname = 0x%X, GLfloat* params = %p)", pname, params);

	es1::Context *context = es1::getContext();

	if(context)
	{
		if(!(context->getFloatv(pname, params)))
		{
			int numParams = context->getQueryParameterNum(pname);

			if(numParams < 0)
			{
				return error(GL_INVALID_ENUM);
			}

			if(numParams == 0)
			{
				return;
			}

			if(context->isQueryParameterBool(pname))
			{
				GLboolean *boolParams = nullptr;
				boolParams = new GLboolean[numParams];

				context->getBooleanv(pname, boolParams);

				for(int i = 0; i < numParams; ++i)
				{
					if(boolParams[i] == GL_FALSE)
						params[i] = 0.0f;
					else
						params[i] = 1.0f;
				}

				delete [] boolParams;
			}
			else if(context->isQueryParameterInt(pname))
			{
				GLint *intParams = nullptr;
				intParams = new GLint[numParams];

				context->getIntegerv(pname, intParams);

				for(int i = 0; i < numParams; ++i)
				{
					params[i] = (GLfloat)intParams[i];
				}

				delete [] intParams;
			}
			else UNREACHABLE(pname);
		}
	}
}

void GL_APIENTRY GetFramebufferAttachmentParameterivOES(GLenum target, GLenum attachment, GLenum pname, GLint* params)
{
	TRACE("(GLenum target = 0x%X, GLenum attachment = 0x%X, GLenum pname = 0x%X, GLint* params = %p)",
	      target, attachment, pname, params);

	es1::Context *context = es1::getContext();

	if(context)
	{
		if(target != GL_FRAMEBUFFER_OES)
		{
			return error(GL_INVALID_ENUM);
		}

		if(context->getFramebufferName() == 0)
		{
			return error(GL_INVALID_OPERATION);
		}

		es1::Framebuffer *framebuffer = context->getFramebuffer();

		if(!framebuffer)
		{
			return error(GL_INVALID_OPERATION);
		}

		GLenum attachmentType;
		GLuint attachmentHandle;
		Renderbuffer *renderbuffer = nullptr;
		switch(attachment)
		{
		case GL_COLOR_ATTACHMENT0_OES:
			attachmentType = framebuffer->getColorbufferType();
			attachmentHandle = framebuffer->getColorbufferName();
			renderbuffer = framebuffer->getColorbuffer();
			break;
		case GL_DEPTH_ATTACHMENT_OES:
			attachmentType = framebuffer->getDepthbufferType();
			attachmentHandle = framebuffer->getDepthbufferName();
			renderbuffer = framebuffer->getDepthbuffer();
			break;
		case GL_STENCIL_ATTACHMENT_OES:
			attachmentType = framebuffer->getStencilbufferType();
			attachmentHandle = framebuffer->getStencilbufferName();
			renderbuffer = framebuffer->getStencilbuffer();
			break;
		default:
			return error(GL_INVALID_ENUM);
		}

		GLenum attachmentObjectType = GL_NONE;   // Type category
		if(attachmentType == GL_NONE_OES || attachmentType == GL_RENDERBUFFER_OES)
		{
			attachmentObjectType = attachmentType;
		}
		else if(es1::IsTextureTarget(attachmentType))
		{
			attachmentObjectType = GL_TEXTURE;
		}
		else UNREACHABLE(attachmentType);

		switch(pname)
		{
		case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE_OES:
			*params = attachmentObjectType;
			break;
		case GL_FRAMEBUFFER_ATTACHMENT_OBJECT_NAME_OES:
			if(attachmentObjectType == GL_RENDERBUFFER_OES || attachmentObjectType == GL_TEXTURE)
			{
				*params = attachmentHandle;
			}
			else
			{
				return error(GL_INVALID_ENUM);
			}
			break;
		case GL_FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL_OES:
			if(attachmentObjectType == GL_TEXTURE)
			{
				*params = renderbuffer->getLevel();
			}
			else
			{
				return error(GL_INVALID_ENUM);
			}
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY GetIntegerv(GLenum pname, GLint* params)
{
	TRACE("(GLenum pname = 0x%X, GLint* params = %p)", pname, params);

	es1::Context *context = es1::getContext();

	if(context)
	{
		if(!(context->getIntegerv(pname, params)))
		{
			int numParams = context->getQueryParameterNum(pname);

			if(numParams < 0)
			{
				return error(GL_INVALID_ENUM);
			}

			if(numParams == 0)
			{
				return;
			}

			if(context->isQueryParameterBool(pname))
			{
				GLboolean *boolParams = nullptr;
				boolParams = new GLboolean[numParams];

				context->getBooleanv(pname, boolParams);

				for(int i = 0; i < numParams; ++i)
				{
					if(boolParams[i] == GL_FALSE)
						params[i] = 0;
					else
						params[i] = 1;
				}

				delete [] boolParams;
			}
			else if(context->isQueryParameterFloat(pname))
			{
				GLfloat *floatParams = nullptr;
				floatParams = new GLfloat[numParams];

				context->getFloatv(pname, floatParams);

				for(int i = 0; i < numParams; ++i)
				{
					if(pname == GL_DEPTH_RANGE || pname == GL_COLOR_CLEAR_VALUE || pname == GL_DEPTH_CLEAR_VALUE)
					{
						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;
			}
			else UNREACHABLE(pname);
		}
	}
}

void GL_APIENTRY GetLightfv(GLenum light, GLenum pname, GLfloat *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY GetLightxv(GLenum light, GLenum pname, GLfixed *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY GetMaterialfv(GLenum face, GLenum pname, GLfloat *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY GetMaterialxv(GLenum face, GLenum pname, GLfixed *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY GetPointerv(GLenum pname, GLvoid **params)
{
	TRACE("(GLenum pname = 0x%X, GLvoid **params = %p)", pname, params);

	es1::Context *context = es1::getContext();

	if(context)
	{
		if(!(context->getPointerv(pname, const_cast<const GLvoid**>(params))))
		{
			return error(GL_INVALID_ENUM);
		}
	}
}

const GLubyte* GL_APIENTRY GetString(GLenum name)
{
	TRACE("(GLenum name = 0x%X)", name);

	switch(name)
	{
	case GL_VENDOR:
		return (GLubyte*)"Google Inc.";
	case GL_RENDERER:
		return (GLubyte*)"Google SwiftShader " VERSION_STRING;
	case GL_VERSION:
		return (GLubyte*)"OpenGL ES-CM 1.1";
	case GL_EXTENSIONS:
		// Keep list sorted in following order:
		// OES extensions
		// EXT extensions
		// Vendor extensions
		return (GLubyte*)
			"GL_OES_blend_equation_separate "
			"GL_OES_blend_func_separate "
			"GL_OES_blend_subtract "
			"GL_OES_compressed_ETC1_RGB8_texture "
			"GL_OES_EGL_image "
			"GL_OES_EGL_image_external "
			"GL_OES_EGL_sync "
			"GL_OES_element_index_uint "
			"GL_OES_fbo_render_mipmap "
			"GL_OES_framebuffer_object "
			"GL_OES_packed_depth_stencil "
			"GL_OES_read_format "
			"GL_OES_rgb8_rgba8 "
			"GL_OES_stencil8 "
			"GL_OES_stencil_wrap "
			"GL_OES_surfaceless_context "
			"GL_OES_texture_mirrored_repeat "
			"GL_OES_texture_npot "
			"GL_EXT_blend_minmax "
			"GL_EXT_read_format_bgra "
			"GL_EXT_texture_compression_dxt1 "
			"GL_ANGLE_texture_compression_dxt3 "
			"GL_ANGLE_texture_compression_dxt5 "
			"GL_EXT_texture_filter_anisotropic "
			"GL_EXT_texture_format_BGRA8888";
	default:
		return error(GL_INVALID_ENUM, (GLubyte*)nullptr);
	}
}

void GL_APIENTRY GetTexParameterfv(GLenum target, GLenum pname, GLfloat* params)
{
	TRACE("(GLenum target = 0x%X, GLenum pname = 0x%X, GLfloat* params = %p)", target, pname, params);

	es1::Context *context = es1::getContext();

	if(context)
	{
		es1::Texture *texture;

		switch(target)
		{
		case GL_TEXTURE_2D:
			texture = context->getTexture2D();
			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_GENERATE_MIPMAP:
			*params = (GLfloat)texture->getGenerateMipmap();
			break;
		case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
			*params = (GLfloat)1;
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY GetTexParameteriv(GLenum target, GLenum pname, GLint* params)
{
	TRACE("(GLenum target = 0x%X, GLenum pname = 0x%X, GLint* params = %p)", target, pname, params);

	es1::Context *context = es1::getContext();

	if(context)
	{
		es1::Texture *texture;

		switch(target)
		{
		case GL_TEXTURE_2D:
			texture = context->getTexture2D();
			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_GENERATE_MIPMAP:
			*params = (GLint)texture->getGenerateMipmap();
			break;
		case GL_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
			*params = 1;
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY GetTexEnvfv(GLenum env, GLenum pname, GLfloat *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY GetTexEnviv(GLenum env, GLenum pname, GLint *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY GetTexEnvxv(GLenum env, GLenum pname, GLfixed *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY GetTexParameterxv(GLenum target, GLenum pname, GLfixed *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY Hint(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);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		switch(target)
		{
		case GL_GENERATE_MIPMAP_HINT:
			context->setGenerateMipmapHint(mode);
			break;
		case GL_PERSPECTIVE_CORRECTION_HINT:
			context->setPerspectiveCorrectionHint(mode);
			break;
		case GL_FOG_HINT:
			context->setFogHint(mode);
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

GLboolean GL_APIENTRY IsBuffer(GLuint buffer)
{
	TRACE("(GLuint buffer = %d)", buffer);

	es1::Context *context = es1::getContext();

	if(context && buffer)
	{
		es1::Buffer *bufferObject = context->getBuffer(buffer);

		if(bufferObject)
		{
			return GL_TRUE;
		}
	}

	return GL_FALSE;
}

GLboolean GL_APIENTRY IsEnabled(GLenum cap)
{
	TRACE("(GLenum cap = 0x%X)", cap);

	es1::Context *context = es1::getContext();

	if(context)
	{
		switch(cap)
		{
		case GL_CULL_FACE:                return context->isCullFaceEnabled();              break;
		case GL_POLYGON_OFFSET_FILL:      return context->isPolygonOffsetFillEnabled();     break;
		case GL_SAMPLE_ALPHA_TO_COVERAGE: return context->isSampleAlphaToCoverageEnabled(); break;
		case GL_SAMPLE_COVERAGE:          return context->isSampleCoverageEnabled();        break;
		case GL_SCISSOR_TEST:             return context->isScissorTestEnabled();           break;
		case GL_STENCIL_TEST:             return context->isStencilTestEnabled();           break;
		case GL_DEPTH_TEST:               return context->isDepthTestEnabled();             break;
		case GL_BLEND:                    return context->isBlendEnabled();                 break;
		case GL_DITHER:                   return context->isDitherEnabled();                break;
		case GL_LIGHTING:                 return context->isLightingEnabled();              break;
		case GL_LIGHT0:                   return context->isLightEnabled(0);                break;
		case GL_LIGHT1:                   return context->isLightEnabled(1);                break;
		case GL_LIGHT2:                   return context->isLightEnabled(2);                break;
		case GL_LIGHT3:                   return context->isLightEnabled(3);                break;
		case GL_LIGHT4:                   return context->isLightEnabled(4);                break;
		case GL_LIGHT5:                   return context->isLightEnabled(5);                break;
		case GL_LIGHT6:                   return context->isLightEnabled(6);                break;
		case GL_LIGHT7:                   return context->isLightEnabled(7);                break;
		case GL_FOG:                      return context->isFogEnabled();                   break;
		case GL_TEXTURE_2D:               return context->isTexture2Denabled();             break;
		case GL_TEXTURE_EXTERNAL_OES:     return context->isTextureExternalEnabled();       break;
		case GL_ALPHA_TEST:               return context->isAlphaTestEnabled();             break;
		case GL_COLOR_LOGIC_OP:           return context->isColorLogicOpEnabled();          break;
		case GL_POINT_SMOOTH:             return context->isPointSmoothEnabled();           break;
		case GL_LINE_SMOOTH:              return context->isLineSmoothEnabled();            break;
		case GL_COLOR_MATERIAL:           return context->isColorMaterialEnabled();         break;
		case GL_NORMALIZE:                return context->isNormalizeEnabled();             break;
		case GL_RESCALE_NORMAL:           return context->isRescaleNormalEnabled();         break;
		case GL_VERTEX_ARRAY:             return context->isVertexArrayEnabled();           break;
		case GL_NORMAL_ARRAY:             return context->isNormalArrayEnabled();           break;
		case GL_COLOR_ARRAY:              return context->isColorArrayEnabled();            break;
		case GL_POINT_SIZE_ARRAY_OES:     return context->isPointSizeArrayEnabled();        break;
		case GL_TEXTURE_COORD_ARRAY:      return context->isTextureCoordArrayEnabled();     break;
		case GL_MULTISAMPLE:              return context->isMultisampleEnabled();           break;
		case GL_SAMPLE_ALPHA_TO_ONE:      return context->isSampleAlphaToOneEnabled();      break;
		case GL_CLIP_PLANE0:              return context->isClipPlaneEnabled(0);            break;
		case GL_CLIP_PLANE1:              return context->isClipPlaneEnabled(1);            break;
		case GL_CLIP_PLANE2:              return context->isClipPlaneEnabled(2);            break;
		case GL_CLIP_PLANE3:              return context->isClipPlaneEnabled(3);            break;
		case GL_CLIP_PLANE4:              return context->isClipPlaneEnabled(4);            break;
		case GL_CLIP_PLANE5:              return context->isClipPlaneEnabled(5);            break;
		case GL_POINT_SPRITE_OES:         return context->isPointSpriteEnabled();           break;
		default:
			return error(GL_INVALID_ENUM, GL_FALSE);
		}
	}

	return GL_FALSE;
}

GLboolean GL_APIENTRY IsFramebufferOES(GLuint framebuffer)
{
	TRACE("(GLuint framebuffer = %d)", framebuffer);

	es1::Context *context = es1::getContext();

	if(context && framebuffer)
	{
		es1::Framebuffer *framebufferObject = context->getFramebuffer(framebuffer);

		if(framebufferObject)
		{
			return GL_TRUE;
		}
	}

	return GL_FALSE;
}

GLboolean GL_APIENTRY IsTexture(GLuint texture)
{
	TRACE("(GLuint texture = %d)", texture);

	es1::Context *context = es1::getContext();

	if(context && texture)
	{
		es1::Texture *textureObject = context->getTexture(texture);

		if(textureObject)
		{
			return GL_TRUE;
		}
	}

	return GL_FALSE;
}

GLboolean GL_APIENTRY IsRenderbufferOES(GLuint renderbuffer)
{
	TRACE("(GLuint renderbuffer = %d)", renderbuffer);

	es1::Context *context = es1::getContext();

	if(context && renderbuffer)
	{
		es1::Renderbuffer *renderbufferObject = context->getRenderbuffer(renderbuffer);

		if(renderbufferObject)
		{
			return GL_TRUE;
		}
	}

	return GL_FALSE;
}

void GL_APIENTRY LightModelf(GLenum pname, GLfloat param)
{
	TRACE("(GLenum pname = 0x%X, GLfloat param = %f)", pname, param);

	es1::Context *context = es1::getContext();

	if(context)
	{
		switch(pname)
		{
		case GL_LIGHT_MODEL_TWO_SIDE:
			context->setLightModelTwoSide(param != 0.0f);
			break;
		case GL_LIGHT_MODEL_AMBIENT:
			return error(GL_INVALID_ENUM);   // Need four values, should call glLightModelfv() instead
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY LightModelfv(GLenum pname, const GLfloat *params)
{
	TRACE("(GLenum pname = 0x%X, const GLfloat *params)", pname);

	es1::Context *context = es1::getContext();

	if(context)
	{
		switch(pname)
		{
		case GL_LIGHT_MODEL_AMBIENT:
			context->setGlobalAmbient(params[0], params[1], params[2], params[3]);
			break;
		case GL_LIGHT_MODEL_TWO_SIDE:
			context->setLightModelTwoSide(params[0] != 0.0f);
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY LightModelx(GLenum pname, GLfixed param)
{
	TRACE("(GLenum pname = 0x%X, GLfixed param = %d)", pname, param);

	es1::Context *context = es1::getContext();

	if(context)
	{
		switch(pname)
		{
		case GL_LIGHT_MODEL_TWO_SIDE:
			context->setLightModelTwoSide(param != 0);
			break;
		case GL_LIGHT_MODEL_AMBIENT:
			return error(GL_INVALID_ENUM);   // Need four values, should call glLightModelxv() instead
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY LightModelxv(GLenum pname, const GLfixed *params)
{
	TRACE("(GLenum pname = 0x%X, const GLfixed *params)", pname);

	es1::Context *context = es1::getContext();

	if(context)
	{
		switch(pname)
		{
		case GL_LIGHT_MODEL_AMBIENT:
			context->setGlobalAmbient((float)params[0] / 0x10000, (float)params[1] / 0x10000, (float)params[2] / 0x10000, (float)params[3] / 0x10000);
			break;
		case GL_LIGHT_MODEL_TWO_SIDE:
			context->setLightModelTwoSide(params[0] != 0);
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY Lightf(GLenum light, GLenum pname, GLfloat param)
{
	TRACE("(GLenum light = 0x%X, GLenum pname = 0x%X, GLfloat param = %f)", light, pname, param);

	int index = light - GL_LIGHT0;

	if(index < 0 || index >= es1::MAX_LIGHTS)
	{
		return error(GL_INVALID_ENUM);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		switch(pname)
		{
		case GL_SPOT_EXPONENT:
			if(param < 0.0f || param > 128.0f)
			{
				return error(GL_INVALID_VALUE);
			}
			context->setSpotLightExponent(index, param);
			break;
		case GL_SPOT_CUTOFF:
			if((param < 0.0f || param > 90.0f) && param != 180.0f)
			{
				return error(GL_INVALID_VALUE);
			}
			context->setSpotLightCutoff(index, param);
			break;
		case GL_CONSTANT_ATTENUATION:
			if(param < 0.0f)
			{
				return error(GL_INVALID_VALUE);
			}
			context->setLightAttenuationConstant(index, param);
			break;
		case GL_LINEAR_ATTENUATION:
			if(param < 0.0f)
			{
				return error(GL_INVALID_VALUE);
			}
			context->setLightAttenuationLinear(index, param);
			break;
		case GL_QUADRATIC_ATTENUATION:
			if(param < 0.0f)
			{
				return error(GL_INVALID_VALUE);
			}
			context->setLightAttenuationQuadratic(index, param);
			break;
		case GL_AMBIENT:
		case GL_DIFFUSE:
		case GL_SPECULAR:
		case GL_POSITION:
		case GL_SPOT_DIRECTION:
			return error(GL_INVALID_ENUM);   // Need four values, should call glLightfv() instead
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY Lightfv(GLenum light, GLenum pname, const GLfloat *params)
{
	TRACE("(GLenum light = 0x%X, GLenum pname = 0x%X, const GLint *params)", light, pname);

	es1::Context *context = es1::getContext();

	if(context)
	{
		int index = light - GL_LIGHT0;

		if(index < 0 || index > es1::MAX_LIGHTS)
		{
			return error(GL_INVALID_ENUM);
		}

		switch(pname)
		{
		case GL_AMBIENT:               context->setLightAmbient(index, params[0], params[1], params[2], params[3]);  break;
		case GL_DIFFUSE:               context->setLightDiffuse(index, params[0], params[1], params[2], params[3]);  break;
		case GL_SPECULAR:              context->setLightSpecular(index, params[0], params[1], params[2], params[3]); break;
		case GL_POSITION:              context->setLightPosition(index, params[0], params[1], params[2], params[3]); break;
		case GL_SPOT_DIRECTION:        context->setLightDirection(index, params[0], params[1], params[2]);           break;
		case GL_SPOT_EXPONENT:
			if(params[0] < 0.0f || params[0] > 128.0f)
			{
				return error(GL_INVALID_VALUE);
			}
			context->setSpotLightExponent(index, params[0]);
			break;
		case GL_SPOT_CUTOFF:
			if((params[0] < 0.0f || params[0] > 90.0f) && params[0] != 180.0f)
			{
				return error(GL_INVALID_VALUE);
			}
			context->setSpotLightCutoff(index, params[0]);
			break;
		case GL_CONSTANT_ATTENUATION:
			if(params[0] < 0.0f)
			{
				return error(GL_INVALID_VALUE);
			}
			context->setLightAttenuationConstant(index, params[0]);
			break;
		case GL_LINEAR_ATTENUATION:
			if(params[0] < 0.0f)
			{
				return error(GL_INVALID_VALUE);
			}
			context->setLightAttenuationLinear(index, params[0]);
			break;
		case GL_QUADRATIC_ATTENUATION:
			if(params[0] < 0.0f)
			{
				return error(GL_INVALID_VALUE);
			}
			context->setLightAttenuationQuadratic(index, params[0]);
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY Lightx(GLenum light, GLenum pname, GLfixed param)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY Lightxv(GLenum light, GLenum pname, const GLfixed *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY LineWidth(GLfloat width)
{
	TRACE("(GLfloat width = %f)", width);

	if(width <= 0.0f)
	{
		return error(GL_INVALID_VALUE);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->setLineWidth(width);
	}
}

void GL_APIENTRY LineWidthx(GLfixed width)
{
	LineWidth((float)width / 0x10000);
}

void GL_APIENTRY LoadIdentity(void)
{
	TRACE("()");

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->loadIdentity();
	}
}

void GL_APIENTRY LoadMatrixf(const GLfloat *m)
{
	TRACE("(const GLfloat *m)");

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->load(m);
	}
}

void GL_APIENTRY LoadMatrixx(const GLfixed *m)
{
	GLfloat matrix[16] =
	{
		(float)m[0] / 0x10000,  (float)m[1] / 0x10000,  (float)m[2] / 0x10000,  (float)m[3] / 0x10000,
		(float)m[4] / 0x10000,  (float)m[5] / 0x10000,  (float)m[6] / 0x10000,  (float)m[7] / 0x10000,
		(float)m[8] / 0x10000,  (float)m[9] / 0x10000,  (float)m[10] / 0x10000, (float)m[11] / 0x10000,
		(float)m[12] / 0x10000, (float)m[13] / 0x10000, (float)m[14] / 0x10000, (float)m[15] / 0x10000
	};

	LoadMatrixf(matrix);
}

void GL_APIENTRY LogicOp(GLenum opcode)
{
	TRACE("(GLenum opcode = 0x%X)", opcode);

	switch(opcode)
	{
	case GL_CLEAR:
	case GL_SET:
	case GL_COPY:
	case GL_COPY_INVERTED:
	case GL_NOOP:
	case GL_INVERT:
	case GL_AND:
	case GL_NAND:
	case GL_OR:
	case GL_NOR:
	case GL_XOR:
	case GL_EQUIV:
	case GL_AND_REVERSE:
	case GL_AND_INVERTED:
	case GL_OR_REVERSE:
	case GL_OR_INVERTED:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->setLogicalOperation(opcode);
	}
}

void GL_APIENTRY Materialf(GLenum face, GLenum pname, GLfloat param)
{
	TRACE("(GLenum face = 0x%X, GLenum pname = 0x%X, GLfloat param = %f)", face, pname, param);

	if(face != GL_FRONT_AND_BACK)
	{
		return error(GL_INVALID_ENUM);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		switch(pname)
		{
		case GL_SHININESS:
			if(param < 0.0f || param > 128.0f)
			{
				return error(GL_INVALID_VALUE);
			}
			context->setMaterialShininess(param);
			break;
		case GL_AMBIENT:
		case GL_DIFFUSE:
		case GL_AMBIENT_AND_DIFFUSE:
		case GL_SPECULAR:
		case GL_EMISSION:
			return error(GL_INVALID_ENUM);   // Need four values, should call glMaterialfv() instead
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY Materialfv(GLenum face, GLenum pname, const GLfloat *params)
{
	TRACE("(GLenum face = 0x%X, GLenum pname = 0x%X, GLfloat params)", face, pname);

	if(face != GL_FRONT_AND_BACK)
	{
		return error(GL_INVALID_ENUM);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		switch(pname)
		{
		case GL_AMBIENT:
			context->setMaterialAmbient(params[0], params[1], params[2], params[3]);
			break;
		case GL_DIFFUSE:
			context->setMaterialDiffuse(params[0], params[1], params[2], params[3]);
			break;
		case GL_AMBIENT_AND_DIFFUSE:
			context->setMaterialAmbient(params[0], params[1], params[2], params[3]);
			context->setMaterialDiffuse(params[0], params[1], params[2], params[3]);
			break;
		case GL_SPECULAR:
			context->setMaterialSpecular(params[0], params[1], params[2], params[3]);
			break;
		case GL_EMISSION:
			context->setMaterialEmission(params[0], params[1], params[2], params[3]);
			break;
		case GL_SHININESS:
			context->setMaterialShininess(params[0]);
			break;
		default:
			return error(GL_INVALID_ENUM);
		}
	}
}

void GL_APIENTRY Materialx(GLenum face, GLenum pname, GLfixed param)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY Materialxv(GLenum face, GLenum pname, const GLfixed *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY MatrixMode(GLenum mode)
{
	TRACE("(GLenum mode = 0x%X)", mode);

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->setMatrixMode(mode);
	}
}

void GL_APIENTRY MultMatrixf(const GLfloat *m)
{
	TRACE("(const GLfloat *m)");

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->multiply(m);
	}
}

void GL_APIENTRY MultMatrixx(const GLfixed *m)
{
	GLfloat matrix[16] =
	{
		(float)m[0] / 0x10000,  (float)m[1] / 0x10000,  (float)m[2] / 0x10000,  (float)m[3] / 0x10000,
		(float)m[4] / 0x10000,  (float)m[5] / 0x10000,  (float)m[6] / 0x10000,  (float)m[7] / 0x10000,
		(float)m[8] / 0x10000,  (float)m[9] / 0x10000,  (float)m[10] / 0x10000, (float)m[11] / 0x10000,
		(float)m[12] / 0x10000, (float)m[13] / 0x10000, (float)m[14] / 0x10000, (float)m[15] / 0x10000
	};

	MultMatrixf(matrix);
}

void GL_APIENTRY MultiTexCoord4f(GLenum target, GLfloat s, GLfloat t, GLfloat r, GLfloat q)
{
	TRACE("(GLenum target = 0x%X, GLfloat s = %f, GLfloat t = %f, GLfloat r = %f, GLfloat q = %f)", target, s, t, r, q);

	switch(target)
	{
	case GL_TEXTURE0:
	case GL_TEXTURE1:
		break;
	default:
		return error(GL_INVALID_ENUM);
	}

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->setVertexAttrib(sw::TexCoord0 + (target - GL_TEXTURE0), s, t, r, q);
	}
}

void GL_APIENTRY MultiTexCoord4x(GLenum target, GLfixed s, GLfixed t, GLfixed r, GLfixed q)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY Normal3f(GLfloat nx, GLfloat ny, GLfloat nz)
{
	TRACE("(GLfloat nx, GLfloat ny, GLfloat nz)", nx, ny, nz);

	es1::Context *context = es1::getContext();

	if(context)
	{
		context->setVertexAttrib(sw::Normal, nx, ny, nz, 0);
	}
}

void GL_APIENTRY Normal3x(GLfixed nx, GLfixed ny, GLfixed nz)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY NormalPointer(GLenum type, GLsizei stride, const GLvoid *pointer)
{
	TRACE("(GLenum type = 0x%X, GLsizei stride = %d, const GLvoid *pointer = %p)", type, stride, pointer);

	VertexAttribPointer(sw::Normal, 3, type, true, stride, pointer);
}