// 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.
//
// 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 "Query.h"
#include "common/debug.h"
#include "Common/SharedLibrary.hpp"
#include "Common/Version.h"
#include "Main/Register.hpp"

#define EGLAPI
#include <EGL/egl.h>
#include <EGL/eglext.h>

#define GL_API
#include <GLES/gl.h>
#define GL_GLEXT_PROTOTYPES
#include <GLES/glext.h>

#include <exception>
#include <limits>

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;
}

static bool validateSubImageParams(bool compressed, GLsizei width, GLsizei height, GLint xoffset, GLint yoffset, GLenum target, GLint level, GLenum format, es1::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_OES && 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 es1::IMPLEMENTATION_COLOR_READ_FORMAT:
        switch (type)
        {
        case es1::IMPLEMENTATION_COLOR_READ_TYPE:
            break;
        default:
            return false;
        }
        break;
    default:
        return false;
    }

    return true;
}

extern "C"
{

EGLint EGLAPIENTRY eglGetError(void)
{
	static auto eglGetError = (EGLint (EGLAPIENTRY*)(void))getProcAddress(libEGL, "eglGetError");
	return eglGetError();
}

EGLDisplay EGLAPIENTRY eglGetDisplay(EGLNativeDisplayType display_id)
{
    static auto eglGetDisplay = (EGLDisplay (EGLAPIENTRY*)(EGLNativeDisplayType display_id))getProcAddress(libEGL, "eglGetDisplay");
	return eglGetDisplay(display_id);
}

EGLBoolean EGLAPIENTRY eglInitialize(EGLDisplay dpy, EGLint *major, EGLint *minor)
{
    static auto eglInitialize = (EGLBoolean (EGLAPIENTRY*)(EGLDisplay dpy, EGLint *major, EGLint *minor))getProcAddress(libEGL, "eglInitialize");
	return eglInitialize(dpy, major, minor);
}

EGLBoolean EGLAPIENTRY eglTerminate(EGLDisplay dpy)
{
    static auto eglTerminate = (EGLBoolean (EGLAPIENTRY*)(EGLDisplay dpy))getProcAddress(libEGL, "eglTerminate");
	return eglTerminate(dpy);
}

const char *EGLAPIENTRY eglQueryString(EGLDisplay dpy, EGLint name)
{
    static auto eglQueryString = (const char *(EGLAPIENTRY*)(EGLDisplay dpy, EGLint name))getProcAddress(libEGL, "eglQueryString");
	return eglQueryString(dpy, name);
}

EGLBoolean EGLAPIENTRY eglGetConfigs(EGLDisplay dpy, EGLConfig *configs, EGLint config_size, EGLint *num_config)
{
    static auto eglGetConfigs = (EGLBoolean (EGLAPIENTRY*)(EGLDisplay dpy, EGLConfig *configs, EGLint config_size, EGLint *num_config))getProcAddress(libEGL, "eglGetConfigs");
	return eglGetConfigs(dpy, configs, config_size, num_config);
}

EGLBoolean EGLAPIENTRY eglChooseConfig(EGLDisplay dpy, const EGLint *attrib_list, EGLConfig *configs, EGLint config_size, EGLint *num_config)
{
    static auto eglChooseConfig = (EGLBoolean (EGLAPIENTRY*)(EGLDisplay dpy, const EGLint *attrib_list, EGLConfig *configs, EGLint config_size, EGLint *num_config))getProcAddress(libEGL, "eglChooseConfig");
	return eglChooseConfig(dpy, attrib_list, configs, config_size, num_config);
}

EGLBoolean EGLAPIENTRY eglGetConfigAttrib(EGLDisplay dpy, EGLConfig config, EGLint attribute, EGLint *value)
{
    static auto eglGetConfigAttrib = (EGLBoolean (EGLAPIENTRY*)(EGLDisplay dpy, EGLConfig config, EGLint attribute, EGLint *value))getProcAddress(libEGL, "eglGetConfigAttrib");
	return eglGetConfigAttrib(dpy, config, attribute, value);
}

EGLSurface EGLAPIENTRY eglCreateWindowSurface(EGLDisplay dpy, EGLConfig config, EGLNativeWindowType window, const EGLint *attrib_list)
{
    static auto eglCreateWindowSurface = (EGLSurface (EGLAPIENTRY*)(EGLDisplay dpy, EGLConfig config, EGLNativeWindowType window, const EGLint *attrib_list))getProcAddress(libEGL, "eglCreateWindowSurface");
	return eglCreateWindowSurface(dpy, config, window, attrib_list);
}

EGLSurface EGLAPIENTRY eglCreatePbufferSurface(EGLDisplay dpy, EGLConfig config, const EGLint *attrib_list)
{
    static auto eglCreatePbufferSurface = (EGLSurface (EGLAPIENTRY*)(EGLDisplay dpy, EGLConfig config, const EGLint *attrib_list))getProcAddress(libEGL, "eglCreatePbufferSurface");
	return eglCreatePbufferSurface(dpy, config, attrib_list);
}

EGLSurface EGLAPIENTRY eglCreatePixmapSurface(EGLDisplay dpy, EGLConfig config, EGLNativePixmapType pixmap, const EGLint *attrib_list)
{
    static auto eglCreatePixmapSurface = (EGLSurface (EGLAPIENTRY*)(EGLDisplay dpy, EGLConfig config, EGLNativePixmapType pixmap, const EGLint *attrib_list))getProcAddress(libEGL, "eglCreatePixmapSurface");
	return eglCreatePixmapSurface(dpy, config, pixmap, attrib_list);
}

EGLBoolean EGLAPIENTRY eglDestroySurface(EGLDisplay dpy, EGLSurface surface)
{
    static auto eglDestroySurface = (EGLBoolean (EGLAPIENTRY*)(EGLDisplay dpy, EGLSurface surface))getProcAddress(libEGL, "eglDestroySurface");
	return eglDestroySurface(dpy, surface);
}

EGLBoolean EGLAPIENTRY eglQuerySurface(EGLDisplay dpy, EGLSurface surface, EGLint attribute, EGLint *value)
{
    static auto eglQuerySurface = (EGLBoolean (EGLAPIENTRY*)(EGLDisplay dpy, EGLSurface surface, EGLint attribute, EGLint *value))getProcAddress(libEGL, "eglQuerySurface");
	return eglQuerySurface(dpy, surface, attribute, value);
}

EGLBoolean EGLAPIENTRY eglBindAPI(EGLenum api)
{
    static auto eglBindAPI = (EGLBoolean (EGLAPIENTRY*)(EGLenum api))getProcAddress(libEGL, "eglBindAPI");
	return eglBindAPI(api);
}

EGLenum EGLAPIENTRY eglQueryAPI(void)
{
    static auto eglQueryAPI = (EGLenum (EGLAPIENTRY*)(void))getProcAddress(libEGL, "eglQueryAPI");
	return eglQueryAPI();
}

EGLBoolean EGLAPIENTRY eglWaitClient(void)
{
	static auto eglWaitClient = (EGLBoolean (EGLAPIENTRY*)(void))getProcAddress(libEGL, "eglWaitClient");
	return eglWaitClient();
}

EGLBoolean EGLAPIENTRY eglReleaseThread(void)
{
    static auto eglReleaseThread = (EGLBoolean (EGLAPIENTRY*)(void))getProcAddress(libEGL, "eglReleaseThread");
	return eglReleaseThread();
}

EGLSurface EGLAPIENTRY eglCreatePbufferFromClientBuffer(EGLDisplay dpy, EGLenum buftype, EGLClientBuffer buffer, EGLConfig config, const EGLint *attrib_list)
{
    static auto eglCreatePbufferFromClientBuffer = (EGLSurface (EGLAPIENTRY*)(EGLDisplay dpy, EGLenum buftype, EGLClientBuffer buffer, EGLConfig config, const EGLint *attrib_list))getProcAddress(libEGL, "eglCreatePbufferFromClientBuffer");
	return eglCreatePbufferFromClientBuffer(dpy, buftype, buffer, config, attrib_list);
}

EGLBoolean EGLAPIENTRY eglSurfaceAttrib(EGLDisplay dpy, EGLSurface surface, EGLint attribute, EGLint value)
{
    static auto eglSurfaceAttrib = (EGLBoolean (EGLAPIENTRY*)(EGLDisplay dpy, EGLSurface surface, EGLint attribute, EGLint value))getProcAddress(libEGL, "eglSurfaceAttrib");
	return eglSurfaceAttrib(dpy, surface, attribute, value);
}

EGLBoolean EGLAPIENTRY eglBindTexImage(EGLDisplay dpy, EGLSurface surface, EGLint buffer)
{
    static auto eglBindTexImage = (EGLBoolean (EGLAPIENTRY*)(EGLDisplay dpy, EGLSurface surface, EGLint buffer))getProcAddress(libEGL, "eglBindTexImage");
	return eglBindTexImage(dpy, surface, buffer);
}

EGLBoolean EGLAPIENTRY eglReleaseTexImage(EGLDisplay dpy, EGLSurface surface, EGLint buffer)
{
    static auto eglReleaseTexImage = (EGLBoolean (EGLAPIENTRY*)(EGLDisplay dpy, EGLSurface surface, EGLint buffer))getProcAddress(libEGL, "eglReleaseTexImage");
	return eglReleaseTexImage(dpy, surface, buffer);
}

EGLBoolean EGLAPIENTRY eglSwapInterval(EGLDisplay dpy, EGLint interval)
{
    static auto eglSwapInterval = (EGLBoolean (EGLAPIENTRY*)(EGLDisplay dpy, EGLint interval))getProcAddress(libEGL, "eglSwapInterval");
	return eglSwapInterval(dpy, interval);
}

EGLContext EGLAPIENTRY eglCreateContext(EGLDisplay dpy, EGLConfig config, EGLContext share_context, const EGLint *attrib_list)
{
    static auto eglCreateContext = (EGLContext (EGLAPIENTRY*)(EGLDisplay dpy, EGLConfig config, EGLContext share_context, const EGLint *attrib_list))getProcAddress(libEGL, "eglCreateContext");
	return eglCreateContext(dpy, config, share_context, attrib_list);
}

EGLBoolean EGLAPIENTRY eglDestroyContext(EGLDisplay dpy, EGLContext ctx)
{
    static auto eglDestroyContext = (EGLBoolean (EGLAPIENTRY*)(EGLDisplay dpy, EGLContext ctx))getProcAddress(libEGL, "eglDestroyContext");
	return eglDestroyContext(dpy, ctx);
}

EGLBoolean EGLAPIENTRY eglMakeCurrent(EGLDisplay dpy, EGLSurface draw, EGLSurface read, EGLContext ctx)
{
    static auto eglMakeCurrent = (EGLBoolean (EGLAPIENTRY*)(EGLDisplay dpy, EGLSurface draw, EGLSurface read, EGLContext ctx))getProcAddress(libEGL, "eglMakeCurrent");
	return eglMakeCurrent(dpy, draw, read, ctx);
}

EGLContext EGLAPIENTRY eglGetCurrentContext(void)
{
    static auto eglGetCurrentContext = (EGLContext (EGLAPIENTRY*)(void))getProcAddress(libEGL, "eglGetCurrentContext");
	return eglGetCurrentContext();
}

EGLSurface EGLAPIENTRY eglGetCurrentSurface(EGLint readdraw)
{
    static auto eglGetCurrentSurface = (EGLSurface (EGLAPIENTRY*)(EGLint readdraw))getProcAddress(libEGL, "eglGetCurrentSurface");
	return eglGetCurrentSurface(readdraw);
}

EGLDisplay EGLAPIENTRY eglGetCurrentDisplay(void)
{
    static auto eglGetCurrentDisplay = (EGLDisplay (EGLAPIENTRY*)(void))getProcAddress(libEGL, "eglGetCurrentDisplay");
	return eglGetCurrentDisplay();
}

EGLBoolean EGLAPIENTRY eglQueryContext(EGLDisplay dpy, EGLContext ctx, EGLint attribute, EGLint *value)
{
    static auto eglQueryContext = (EGLBoolean (EGLAPIENTRY*)(EGLDisplay dpy, EGLContext ctx, EGLint attribute, EGLint *value))getProcAddress(libEGL, "eglQueryContext");
	return eglQueryContext(dpy, ctx, attribute, value);
}

EGLBoolean EGLAPIENTRY eglWaitGL(void)
{
    static auto eglWaitGL = (EGLBoolean (EGLAPIENTRY*)(void))getProcAddress(libEGL, "eglWaitGL");
	return eglWaitGL();
}

EGLBoolean EGLAPIENTRY eglWaitNative(EGLint engine)
{
    static auto eglWaitNative = (EGLBoolean (EGLAPIENTRY*)(EGLint engine))getProcAddress(libEGL, "eglWaitNative");
	return eglWaitNative(engine);
}

EGLBoolean EGLAPIENTRY eglSwapBuffers(EGLDisplay dpy, EGLSurface surface)
{
    static auto eglSwapBuffers = (EGLBoolean (EGLAPIENTRY*)(EGLDisplay dpy, EGLSurface surface))getProcAddress(libEGL, "eglSwapBuffers");
	return eglSwapBuffers(dpy, surface);
}

EGLBoolean EGLAPIENTRY eglCopyBuffers(EGLDisplay dpy, EGLSurface surface, EGLNativePixmapType target)
{
    static auto eglCopyBuffers = (EGLBoolean (EGLAPIENTRY*)(EGLDisplay dpy, EGLSurface surface, EGLNativePixmapType target))getProcAddress(libEGL, "eglCopyBuffers");
	return eglCopyBuffers(dpy, surface, target);
}

EGLImageKHR EGLAPIENTRY eglCreateImageKHR(EGLDisplay dpy, EGLContext ctx, EGLenum target, EGLClientBuffer buffer, const EGLint *attrib_list)
{
    static auto eglCreateImageKHR = (EGLImageKHR (EGLAPIENTRY*)(EGLDisplay dpy, EGLContext ctx, EGLenum target, EGLClientBuffer buffer, const EGLint *attrib_list))getProcAddress(libEGL, "eglCreateImageKHR");
	return eglCreateImageKHR(dpy, ctx, target, buffer, attrib_list);
}

EGLBoolean EGLAPIENTRY eglDestroyImageKHR(EGLDisplay dpy, EGLImageKHR image)
{
    static auto eglDestroyImageKHR = (EGLBoolean (EGLAPIENTRY*)(EGLDisplay dpy, EGLImageKHR image))getProcAddress(libEGL, "eglDestroyImageKHR");
	return eglDestroyImageKHR(dpy, image);
}

__eglMustCastToProperFunctionPointerType EGLAPIENTRY eglGetProcAddress(const char *procname)
{
    static auto eglGetProcAddress = (__eglMustCastToProperFunctionPointerType (EGLAPIENTRY*)(const char*))getProcAddress(libEGL, "eglGetProcAddress");
	return eglGetProcAddress(procname);
}

void GL_APIENTRY glActiveTexture(GLenum texture)
{
    TRACE("(GLenum texture = 0x%X)", texture);

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            if(texture < GL_TEXTURE0 || texture > GL_TEXTURE0 + es1::MAX_TEXTURE_IMAGE_UNITS - 1)
            {
                return error(GL_INVALID_ENUM);
            }

            context->setActiveSampler(texture - GL_TEXTURE0);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glAlphaFunc(GLenum func, GLclampf ref)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glAlphaFuncx(GLenum func, GLclampx ref)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glBindBuffer(GLenum target, GLuint buffer)
{
    TRACE("(GLenum target = 0x%X, GLuint buffer = %d)", target, buffer);

    try
    {
        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);
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glBindFramebuffer(GLenum target, GLuint framebuffer)
{
    TRACE("(GLenum target = 0x%X, GLuint framebuffer = %d)", target, framebuffer);

    try
    {
        if(target != GL_FRAMEBUFFER_OES)
        {
            return error(GL_INVALID_ENUM);
        }

        es1::Context *context = es1::getContext();

        if(context)
        {
            context->bindFramebuffer(framebuffer);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glBindFramebufferOES(GLenum target, GLuint framebuffer)
{
    TRACE("(GLenum target = 0x%X, GLuint framebuffer = %d)", target, framebuffer);

    try
    {
        if(target != GL_FRAMEBUFFER_OES)
        {
            return error(GL_INVALID_ENUM);
        }

        es1::Context *context = es1::getContext();

        if(context)
        {
            context->bindFramebuffer(framebuffer);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glBindRenderbufferOES(GLenum target, GLuint renderbuffer)
{
    TRACE("(GLenum target = 0x%X, GLuint renderbuffer = %d)", target, renderbuffer);

    try
    {
        if(target != GL_RENDERBUFFER_OES)
        {
            return error(GL_INVALID_ENUM);
        }

        es1::Context *context = es1::getContext();

        if(context)
        {
            context->bindRenderbuffer(renderbuffer);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}


void GL_APIENTRY glBindTexture(GLenum target, GLuint texture)
{
    TRACE("(GLenum target = 0x%X, GLuint texture = %d)", target, texture);

    try
    {
        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->bindTexture2D(texture);
                return;
            case GL_TEXTURE_EXTERNAL_OES:
                context->bindTextureExternal(texture);
                return;
            default:
                return error(GL_INVALID_ENUM);
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glBlendEquationSeparateOES(GLenum modeRGB, GLenum modeAlpha)
{
    TRACE("(GLenum modeRGB = 0x%X, GLenum modeAlpha = 0x%X)", modeRGB, modeAlpha);

    try
    {
        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);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glBlendFunc(GLenum sfactor, GLenum dfactor)
{
    glBlendFuncSeparateOES(sfactor, dfactor, sfactor, dfactor);
}

void GL_APIENTRY glBlendFuncSeparateOES(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);

    try
    {
        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);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glBufferData(GLenum target, GLsizeiptr size, const GLvoid* data, GLenum usage)
{
    TRACE("(GLenum target = 0x%X, GLsizeiptr size = %d, const GLvoid* data = 0x%0.8p, GLenum usage = %d)",
          target, size, data, usage);

    try
    {
        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);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glBufferSubData(GLenum target, GLintptr offset, GLsizeiptr size, const GLvoid* data)
{
    TRACE("(GLenum target = 0x%X, GLintptr offset = %d, GLsizeiptr size = %d, const GLvoid* data = 0x%0.8p)",
          target, offset, size, data);

    try
    {
        if(size < 0 || offset < 0)
        {
            return error(GL_INVALID_VALUE);
        }

        if(data == NULL)
        {
            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);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

GLenum GL_APIENTRY glCheckFramebufferStatusOES(GLenum target)
{
    TRACE("(GLenum target = 0x%X)", target);

    try
    {
        if(target != GL_FRAMEBUFFER_OES)
        {
            return error(GL_INVALID_ENUM, 0);
        }

        es1::Context *context = es1::getContext();

        if(context)
        {
            es1::Framebuffer *framebuffer = context->getFramebuffer();

            return framebuffer->completeness();
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY, 0);
    }

    return 0;
}

void GL_APIENTRY glClear(GLbitfield mask)
{
    TRACE("(GLbitfield mask = %X)", mask);

    try
    {
		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);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

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);

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            context->setClearColor(red, green, blue, alpha);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glClearColorx(GLclampx red, GLclampx green, GLclampx blue, GLclampx alpha)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glClearDepthf(GLclampf depth)
{
    TRACE("(GLclampf depth = %f)", depth);

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            context->setClearDepth(depth);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glClearDepthx(GLclampx depth)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glClearStencil(GLint s)
{
    TRACE("(GLint s = %d)", s);

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            context->setClearStencil(s);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glClientActiveTexture(GLenum texture)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glClipPlanef(GLenum plane, const GLfloat *equation)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glClipPlanex(GLenum plane, const GLfixed *equation)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glColor4f(GLfloat red, GLfloat green, GLfloat blue, GLfloat alpha)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glColor4ub(GLubyte red, GLubyte green, GLubyte blue, GLubyte alpha)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glColor4x(GLfixed red, GLfixed green, GLfixed blue, GLfixed alpha)
{
	UNIMPLEMENTED();
}

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);

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            context->setColorMask(red == GL_TRUE, green == GL_TRUE, blue == GL_TRUE, alpha == GL_TRUE);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glColorPointer(GLint size, GLenum type, GLsizei stride, const GLvoid *pointer)
{
	UNIMPLEMENTED();
}

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);

    try
    {
        if(!validImageSize(level, width, height) || border != 0 || imageSize < 0)
        {
            return error(GL_INVALID_VALUE);
        }

        switch(internalformat)
        {
        case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
        case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
			if(!S3TC_SUPPORT)
            {
                return error(GL_INVALID_ENUM);
            }
            break;
		case GL_DEPTH_COMPONENT16_OES:
		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);
        }

        es1::Context *context = es1::getContext();

        if(context)
        {
			if(level > es1::IMPLEMENTATION_MAX_TEXTURE_LEVELS)
            {
                return error(GL_INVALID_VALUE);
            }

            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 != es1::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();
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

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);

    try
    {
        if(!es1::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_COMPRESSED_RGB_S3TC_DXT1_EXT:
        case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
			if(!S3TC_SUPPORT)
            {
                return error(GL_INVALID_ENUM);
            }
            break;
        default:
            return error(GL_INVALID_ENUM);
        }

        if(width == 0 || height == 0 || data == NULL)
        {
            return;
        }

        es1::Context *context = es1::getContext();

        if(context)
        {
            if(level > es1::IMPLEMENTATION_MAX_TEXTURE_LEVELS)
            {
                return error(GL_INVALID_VALUE);
            }

            if(imageSize != es1::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();

                if(validateSubImageParams(true, width, height, xoffset, yoffset, target, level, format, texture))
				{
					texture->subImageCompressed(level, xoffset, yoffset, width, height, format, imageSize, data);
				}
            }
            else UNREACHABLE();
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

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);

    try
    {
        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->completeness() != GL_FRAMEBUFFER_COMPLETE_OES)
            {
                return error(GL_INVALID_FRAMEBUFFER_OPERATION_OES);
            }

            if(context->getFramebufferHandle() != 0 && framebuffer->getColorbuffer()->getSamples() > 1)
            {
                return error(GL_INVALID_OPERATION);
            }

            es1::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_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)
                 {
                     return error(GL_INVALID_OPERATION);
                 }
                 break;
            case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
            case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
                if(S3TC_SUPPORT)
                {
                    return error(GL_INVALID_OPERATION);
                }
                else
                {
                    return error(GL_INVALID_ENUM);
                }
                break;
            default:
                return error(GL_INVALID_ENUM);
            }

            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();
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

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);

    try
    {
        if(!es1::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;
        }

        es1::Context *context = es1::getContext();

        if(context)
        {
            if(level > es1::IMPLEMENTATION_MAX_TEXTURE_LEVELS)
            {
                return error(GL_INVALID_VALUE);
            }

            es1::Framebuffer *framebuffer = context->getFramebuffer();

            if(framebuffer->completeness() != GL_FRAMEBUFFER_COMPLETE_OES)
            {
                return error(GL_INVALID_FRAMEBUFFER_OPERATION_OES);
            }

            if(context->getFramebufferHandle() != 0 && framebuffer->getColorbuffer()->getSamples() > 1)
            {
                return error(GL_INVALID_OPERATION);
            }

            es1::Renderbuffer *source = framebuffer->getColorbuffer();
            GLenum colorbufferFormat = source->getFormat();
            es1::Texture *texture = NULL;

            if(target == GL_TEXTURE_2D)
            {
                texture = context->getTexture2D();
            }
            else UNREACHABLE();

            if(!validateSubImageParams(false, width, height, xoffset, yoffset, target, level, GL_NONE_OES, 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_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)
                {
                    return error(GL_INVALID_OPERATION);
                }
                break;
            case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
            case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
                return error(GL_INVALID_OPERATION);
			case GL_DEPTH_STENCIL_OES:
				return error(GL_INVALID_OPERATION);
            default:
                return error(GL_INVALID_OPERATION);
            }

            texture->copySubImage(target, level, xoffset, yoffset, x, y, width, height, framebuffer);
        }
    }

    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glCullFace(GLenum mode)
{
    TRACE("(GLenum mode = 0x%X)", mode);

    try
    {
        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);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glDeleteBuffers(GLsizei n, const GLuint* buffers)
{
    TRACE("(GLsizei n = %d, const GLuint* buffers = 0x%0.8p)", n, buffers);

    try
    {
        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]);
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glDeleteFramebuffersOES(GLsizei n, const GLuint* framebuffers)
{
    TRACE("(GLsizei n = %d, const GLuint* framebuffers = 0x%0.8p)", n, framebuffers);

    try
    {
        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]);
                }
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glDeleteRenderbuffersOES(GLsizei n, const GLuint* renderbuffers)
{
    TRACE("(GLsizei n = %d, const GLuint* renderbuffers = 0x%0.8p)", n, renderbuffers);

    try
    {
        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]);
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glDeleteTextures(GLsizei n, const GLuint* textures)
{
    TRACE("(GLsizei n = %d, const GLuint* textures = 0x%0.8p)", n, textures);

    try
    {
        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]);
                }
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glDepthFunc(GLenum func)
{
    TRACE("(GLenum func = 0x%X)", func);

    try
    {
        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);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glDepthMask(GLboolean flag)
{
    TRACE("(GLboolean flag = %d)", flag);

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            context->setDepthMask(flag != GL_FALSE);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glDepthRangex(GLclampx zNear, GLclampx zFar)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glDepthRangef(GLclampf zNear, GLclampf zFar)
{
    TRACE("(GLclampf zNear = %f, GLclampf zFar = %f)", zNear, zFar);

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            context->setDepthRange(zNear, zFar);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glDisable(GLenum cap)
{
    TRACE("(GLenum cap = 0x%X)", cap);

    try
    {
        es1::Context *context = es1::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;
			case GL_LIGHTING:                 context->setLighting(false);              break;
			case GL_LIGHT0:                   context->setLight(0, false);              break;
			case GL_LIGHT1:                   context->setLight(1, false);              break;
		    case GL_LIGHT2:                   context->setLight(2, false);              break;
			case GL_LIGHT3:                   context->setLight(3, false);              break;
			case GL_LIGHT4:                   context->setLight(4, false);              break;
			case GL_LIGHT5:                   context->setLight(5, false);              break;
			case GL_LIGHT6:                   context->setLight(6, false);              break;
			case GL_LIGHT7:                   context->setLight(7, false);              break;
			case GL_FOG:                      UNIMPLEMENTED(); break;
			case GL_TEXTURE_2D:               UNIMPLEMENTED(); break;
			case GL_ALPHA_TEST:               UNIMPLEMENTED(); break;
			case GL_COLOR_LOGIC_OP:           UNIMPLEMENTED(); break;
			case GL_POINT_SMOOTH:             UNIMPLEMENTED(); break;
			case GL_LINE_SMOOTH:              UNIMPLEMENTED(); break;
			case GL_COLOR_MATERIAL:           UNIMPLEMENTED(); break;
			case GL_NORMALIZE:                UNIMPLEMENTED(); break;
			case GL_RESCALE_NORMAL:           UNIMPLEMENTED(); break;
			case GL_VERTEX_ARRAY:             UNIMPLEMENTED(); break;
			case GL_NORMAL_ARRAY:             UNIMPLEMENTED(); break;
			case GL_COLOR_ARRAY:              UNIMPLEMENTED(); break;
			case GL_TEXTURE_COORD_ARRAY:      UNIMPLEMENTED(); break;
			case GL_MULTISAMPLE:              UNIMPLEMENTED(); break;
			case GL_SAMPLE_ALPHA_TO_ONE:      UNIMPLEMENTED(); break;
            default:
                return error(GL_INVALID_ENUM);
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glDisableClientState(GLenum array)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glDrawArrays(GLenum mode, GLint first, GLsizei count)
{
    TRACE("(GLenum mode = 0x%X, GLint first = %d, GLsizei count = %d)", mode, first, count);

    try
    {
        if(count < 0 || first < 0)
        {
            return error(GL_INVALID_VALUE);
        }

        es1::Context *context = es1::getContext();

        if(context)
        {
            context->drawArrays(mode, first, count);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

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);

    try
    {
        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);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glEnable(GLenum cap)
{
    TRACE("(GLenum cap = 0x%X)", cap);

    try
    {
        es1::Context *context = es1::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;
			case GL_LIGHTING:                 context->setLighting(true);              break;
			case GL_LIGHT0:                   context->setLight(0, true);              break;
			case GL_LIGHT1:                   context->setLight(1, true);              break;
		    case GL_LIGHT2:                   context->setLight(2, true);              break;
			case GL_LIGHT3:                   context->setLight(3, true);              break;
			case GL_LIGHT4:                   context->setLight(4, true);              break;
			case GL_LIGHT5:                   context->setLight(5, true);              break;
			case GL_LIGHT6:                   context->setLight(6, true);              break;
			case GL_LIGHT7:                   context->setLight(7, true);              break;
			case GL_FOG:                      UNIMPLEMENTED(); break;
			case GL_TEXTURE_2D:               UNIMPLEMENTED(); break;
			case GL_ALPHA_TEST:               UNIMPLEMENTED(); break;
			case GL_COLOR_LOGIC_OP:           UNIMPLEMENTED(); break;
			case GL_POINT_SMOOTH:             UNIMPLEMENTED(); break;
			case GL_LINE_SMOOTH:              UNIMPLEMENTED(); break;
			case GL_COLOR_MATERIAL:           UNIMPLEMENTED(); break;
			case GL_NORMALIZE:                UNIMPLEMENTED(); break;
			case GL_RESCALE_NORMAL:           UNIMPLEMENTED(); break;
			case GL_VERTEX_ARRAY:             UNIMPLEMENTED(); break;
			case GL_NORMAL_ARRAY:             UNIMPLEMENTED(); break;
			case GL_COLOR_ARRAY:              UNIMPLEMENTED(); break;
			case GL_TEXTURE_COORD_ARRAY:      UNIMPLEMENTED(); break;
			case GL_MULTISAMPLE:              UNIMPLEMENTED(); break;
			case GL_SAMPLE_ALPHA_TO_ONE:      UNIMPLEMENTED(); break;
			default:
                return error(GL_INVALID_ENUM);
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glEnableClientState(GLenum array)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glFinish(void)
{
    TRACE("()");

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            context->finish();
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glFlush(void)
{
    TRACE("()");

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            context->flush();
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glFramebufferRenderbufferOES(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);

    try
    {
        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 framebufferHandle = context->getFramebufferHandle();
            
            if(!framebuffer || (framebufferHandle == 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);
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glFramebufferTexture2DOES(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);

    try
    {
        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 == 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;
                  default:
                    return error(GL_INVALID_ENUM);
                }

                if(level != 0)
                {
                    return error(GL_INVALID_VALUE);
                }
            }

            es1::Framebuffer *framebuffer = context->getFramebuffer();
            GLuint framebufferHandle = context->getFramebufferHandle();

            if(framebufferHandle == 0 || !framebuffer)
            {
                return error(GL_INVALID_OPERATION);
            }

            switch(attachment)
            {
            case GL_COLOR_ATTACHMENT0_OES:  framebuffer->setColorbuffer(textarget, texture);   break;
            case GL_DEPTH_ATTACHMENT_OES:   framebuffer->setDepthbuffer(textarget, texture);   break;
            case GL_STENCIL_ATTACHMENT_OES: framebuffer->setStencilbuffer(textarget, texture); break;
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glFogf(GLenum pname, GLfloat param)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glFogfv(GLenum pname, const GLfloat *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glFogx(GLenum pname, GLfixed param)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glFogxv(GLenum pname, const GLfixed *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glFrontFace(GLenum mode)
{
    TRACE("(GLenum mode = 0x%X)", mode);

    try
    {
        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);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glFrustumf(GLfloat left, GLfloat right, GLfloat bottom, GLfloat top, GLfloat zNear, GLfloat zFar)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glFrustumx(GLfixed left, GLfixed right, GLfixed bottom, GLfixed top, GLfixed zNear, GLfixed zFar)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glGenerateMipmapOES(GLenum target)
{
    TRACE("(GLenum target = 0x%X)", target);

    try
    {
        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();
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glGenBuffers(GLsizei n, GLuint* buffers)
{
    TRACE("(GLsizei n = %d, GLuint* buffers = 0x%0.8p)", n, buffers);

    try
    {
        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();
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glGenFramebuffersOES(GLsizei n, GLuint* framebuffers)
{
    TRACE("(GLsizei n = %d, GLuint* framebuffers = 0x%0.8p)", n, framebuffers);

    try
    {
        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();
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glGenRenderbuffersOES(GLsizei n, GLuint* renderbuffers)
{
    TRACE("(GLsizei n = %d, GLuint* renderbuffers = 0x%0.8p)", n, renderbuffers);

    try
    {
        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();
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glGenTextures(GLsizei n, GLuint* textures)
{
    TRACE("(GLsizei n = %d, GLuint* textures =  0x%0.8p)", n, textures);

    try
    {
        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();
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glGetRenderbufferParameterivOES(GLenum target, GLenum pname, GLint* params)
{
    TRACE("(GLenum target = 0x%X, GLenum pname = 0x%X, GLint* params = 0x%0.8p)", target, pname, params);

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            if(target != GL_RENDERBUFFER_OES)
            {
                return error(GL_INVALID_ENUM);
            }

            if(context->getRenderbufferHandle() == 0)
            {
                return error(GL_INVALID_OPERATION);
            }

            es1::Renderbuffer *renderbuffer = context->getRenderbuffer(context->getRenderbufferHandle());

            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: *params = renderbuffer->getFormat();      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);
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glGetBooleanv(GLenum pname, GLboolean* params)
{
    TRACE("(GLenum pname = 0x%X, GLboolean* params = 0x%0.8p)",  pname, params);

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            if(!(context->getBooleanv(pname, params)))
            {
                unsigned int numParams = context->getQueryParameterNum(pname);
				
				if(numParams < 0)
				{
					return error(GL_INVALID_ENUM);
				}

				if(numParams == 0)
				{
					return;
				}

                if(context->isQueryParameterFloat(pname))
                {
                    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(context->isQueryParameterInt(pname))
                {
                    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;
                }
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

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);

    try
    {
        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 = buffer->size();
                break;
              default: return error(GL_INVALID_ENUM);
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glGetClipPlanef(GLenum pname, GLfloat eqn[4])
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glGetClipPlanex(GLenum pname, GLfixed eqn[4])
{
	UNIMPLEMENTED();
}

GLenum GL_APIENTRY glGetError(void)
{
    TRACE("()");

    es1::Context *context = es1::getContext();

    if(context)
    {
        return context->getError();
    }

    return GL_NO_ERROR;
}

void GL_APIENTRY glGetFixedv(GLenum pname, GLfixed *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glGetFloatv(GLenum pname, GLfloat* params)
{
    TRACE("(GLenum pname = 0x%X, GLfloat* params = 0x%0.8p)", pname, params);

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            if(!(context->getFloatv(pname, params)))
            {
                unsigned int numParams = context->getQueryParameterNum(pname);
				
				if(numParams < 0)
				{
					return error(GL_INVALID_ENUM);
				}

				if(numParams == 0)
				{
					return;
				}

                if(context->isQueryParameterBool(pname))
                {
                    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(context->isQueryParameterInt(pname))
                {
                    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;
                }
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glGetFramebufferAttachmentParameterivOES(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);

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            if(target != GL_FRAMEBUFFER_OES)
            {
                return error(GL_INVALID_ENUM);
            }
            
            if(context->getFramebufferHandle() == 0)
            {
                return error(GL_INVALID_OPERATION);
            }

            es1::Framebuffer *framebuffer = context->getFramebuffer();
            
            GLenum attachmentType;
            GLuint attachmentHandle;
            switch(attachment)
            {
            case GL_COLOR_ATTACHMENT0_OES:    
                attachmentType = framebuffer->getColorbufferType();
                attachmentHandle = framebuffer->getColorbufferHandle(); 
                break;
            case GL_DEPTH_ATTACHMENT_OES:
                attachmentType = framebuffer->getDepthbufferType();
                attachmentHandle = framebuffer->getDepthbufferHandle();
                break;
            case GL_STENCIL_ATTACHMENT_OES:
                attachmentType = framebuffer->getStencilbufferType();
                attachmentHandle = framebuffer->getStencilbufferHandle();
                break;
            default:
				return error(GL_INVALID_ENUM);
            }

            GLenum attachmentObjectType;   // Type category
            if(attachmentType == GL_NONE_OES || attachmentType == GL_RENDERBUFFER_OES)
            {
                attachmentObjectType = attachmentType;
            }
            else if(es1::IsTextureTarget(attachmentType))
            {
                attachmentObjectType = GL_TEXTURE;
            }
            else UNREACHABLE();

            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 = 0; // FramebufferTexture2D will not allow level to be set to anything else in GL ES 2.0
                }
                else
                {
                    return error(GL_INVALID_ENUM);
                }
                break;
            default:
                return error(GL_INVALID_ENUM);
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glGetIntegerv(GLenum pname, GLint* params)
{
    TRACE("(GLenum pname = 0x%X, GLint* params = 0x%0.8p)", pname, params);

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            if(!(context->getIntegerv(pname, params)))
            {
                unsigned int numParams = context->getQueryParameterNum(pname);
				
				if(numParams < 0)
				{
					return error(GL_INVALID_ENUM);
				}

				if(numParams == 0)
				{
					return;
				}

                if(context->isQueryParameterBool(pname))
                {
                    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(context->isQueryParameterFloat(pname))
                {
                    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)
                        {
                            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;
                }
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glGetLightfv(GLenum light, GLenum pname, GLfloat *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glGetLightxv(GLenum light, GLenum pname, GLfixed *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glGetMaterialfv(GLenum face, GLenum pname, GLfloat *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glGetMaterialxv(GLenum face, GLenum pname, GLfixed *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glGetPointerv(GLenum pname, GLvoid **params)
{
	UNIMPLEMENTED();
}

const GLubyte* GL_APIENTRY glGetString(GLenum name)
{
    TRACE("(GLenum name = 0x%X)", name);

    try
    {
        es1::Context *context = es1::getContext();

        switch(name)
        {
        case GL_VENDOR:
            return (GLubyte*)"TransGaming Inc.";
        case GL_RENDERER:
            return (GLubyte*)"SwiftShader";
        case GL_VERSION:
            return (GLubyte*)"OpenGL ES 1.1 SwiftShader "VERSION_STRING;
        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_depth_texture "
				"GL_OES_EGL_image "
                "GL_OES_EGL_image_external "
                "GL_OES_element_index_uint "
				"GL_OES_framebuffer_object "
                "GL_OES_packed_depth_stencil "
                "GL_OES_rgb8_rgba8 "
				"GL_OES_stencil8 "
				"GL_OES_stencil_wrap "
                "GL_OES_texture_float "
                "GL_OES_texture_float_linear "
                "GL_OES_texture_half_float "
                "GL_OES_texture_half_float_linear "
				"GL_OES_texture_mirrored_repeat "
                "GL_OES_texture_npot "
                "GL_EXT_blend_minmax "
                "GL_EXT_read_format_bgra "
                #if (S3TC_SUPPORT)
                "GL_EXT_texture_compression_dxt1 "
                "GL_ANGLE_texture_compression_dxt3 "
                "GL_ANGLE_texture_compression_dxt5 "
                #endif
                "GL_EXT_texture_filter_anisotropic "
                "GL_EXT_texture_format_BGRA8888";
        default:
            return error(GL_INVALID_ENUM, (GLubyte*)NULL);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY, (GLubyte*)NULL);
    }

    return 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);

    try
    {
        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_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
                *params = (GLfloat)1;
                break;
            default:
                return error(GL_INVALID_ENUM);
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

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);

    try
    {
        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_REQUIRED_TEXTURE_IMAGE_UNITS_OES:
                *params = 1;
                break;
            default:
                return error(GL_INVALID_ENUM);
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glGetTexEnvfv(GLenum env, GLenum pname, GLfloat *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glGetTexEnviv(GLenum env, GLenum pname, GLint *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glGetTexEnvxv(GLenum env, GLenum pname, GLfixed *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glGetTexParameterxv(GLenum target, GLenum pname, GLfixed *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glHint(GLenum target, GLenum mode)
{
    TRACE("(GLenum target = 0x%X, GLenum mode = 0x%X)", target, mode);

    try
    {
        switch(mode)
        {
          case GL_FASTEST:
          case GL_NICEST:
          case GL_DONT_CARE:
            break;
          default:
            return error(GL_INVALID_ENUM); 
        }

        es1::Context *context = es1::getContext();
        switch(target)
        {
          case GL_GENERATE_MIPMAP_HINT:
            if(context) context->setGenerateMipmapHint(mode);
            break;
          default:
            return error(GL_INVALID_ENUM);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

GLboolean GL_APIENTRY glIsBuffer(GLuint buffer)
{
    TRACE("(GLuint buffer = %d)", buffer);

    try
    {
        es1::Context *context = es1::getContext();

        if(context && buffer)
        {
            es1::Buffer *bufferObject = context->getBuffer(buffer);

            if(bufferObject)
            {
                return GL_TRUE;
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY, GL_FALSE);
    }

    return GL_FALSE;
}

GLboolean GL_APIENTRY glIsEnabled(GLenum cap)
{
    TRACE("(GLenum cap = 0x%X)", cap);

    try
    {
        es1::Context *context = es1::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);
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY, false);
    }

    return false;
}

GLboolean GL_APIENTRY glIsFramebufferOES(GLuint framebuffer)
{
    TRACE("(GLuint framebuffer = %d)", framebuffer);

    try
    {
        es1::Context *context = es1::getContext();

        if(context && framebuffer)
        {
            es1::Framebuffer *framebufferObject = context->getFramebuffer(framebuffer);

            if(framebufferObject)
            {
                return GL_TRUE;
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY, GL_FALSE);
    }

    return GL_FALSE;
}

GLboolean GL_APIENTRY glIsTexture(GLuint texture)
{
    TRACE("(GLuint texture = %d)", texture);

    try
    {
        es1::Context *context = es1::getContext();

        if(context && texture)
        {
            es1::Texture *textureObject = context->getTexture(texture);

            if(textureObject)
            {
                return GL_TRUE;
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY, GL_FALSE);
    }

    return GL_FALSE;
}

GLboolean GL_APIENTRY glIsRenderbufferOES(GLuint renderbuffer)
{
    TRACE("(GLuint renderbuffer = %d)", renderbuffer);

    try
    {
        es1::Context *context = es1::getContext();

        if(context && renderbuffer)
        {
            es1::Renderbuffer *renderbufferObject = context->getRenderbuffer(renderbuffer);

            if(renderbufferObject)
            {
                return GL_TRUE;
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY, GL_FALSE);
    }

    return GL_FALSE;
}

void GL_APIENTRY glLightModelf(GLenum pname, GLfloat param)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glLightModelfv(GLenum pname, const GLfloat *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glLightModelx(GLenum pname, GLfixed param)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glLightModelxv(GLenum pname, const GLfixed *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glLightf(GLenum light, GLenum pname, GLfloat param)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glLightfv(GLenum light, GLenum pname, const GLfloat *params)
{
	TRACE("(GLenum light = 0x%X, GLenum pname = 0x%X, const GLint *params)", light, pname);
    
	try
    {
        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:         UNIMPLEMENTED(); break;
			case GL_SPOT_CUTOFF:           UNIMPLEMENTED(); break;
			case GL_CONSTANT_ATTENUATION:  context->setLightAttenuationConstant(index, params[0]);                       break;
			case GL_LINEAR_ATTENUATION:    context->setLightAttenuationLinear(index, params[0]);                         break;
			case GL_QUADRATIC_ATTENUATION: context->setLightAttenuationQuadratic(index, params[0]);                      break;
			default:
				return error(GL_INVALID_ENUM);
			}
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glLightx(GLenum light, GLenum pname, GLfixed param)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glLightxv(GLenum light, GLenum pname, const GLfixed *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glLineWidth(GLfloat width)
{
    TRACE("(GLfloat width = %f)", width);

    try
    {
        if(width <= 0.0f)
        {
            return error(GL_INVALID_VALUE);
        }

        es1::Context *context = es1::getContext();

        if(context)
        {
            context->setLineWidth(width);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glLineWidthx(GLfixed width)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glLoadIdentity(void)
{
	TRACE("()");

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            context->loadIdentity();
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glLoadMatrixf(const GLfloat *m)
{
	TRACE("(const GLfloat *m)");

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            context->load(m);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glLoadMatrixx(const GLfixed *m)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glLogicOp(GLenum opcode)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glMaterialf(GLenum face, GLenum pname, GLfloat param)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glMaterialfv(GLenum face, GLenum pname, const GLfloat *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glMaterialx(GLenum face, GLenum pname, GLfixed param)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glMaterialxv(GLenum face, GLenum pname, const GLfixed *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glMatrixMode(GLenum mode)
{
	TRACE("(GLenum mode = 0x%X)", mode);

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            context->setMatrixMode(mode);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glMultMatrixf(const GLfloat *m)
{
	TRACE("(const GLfloat *m)");

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            context->multiply(m);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glMultMatrixx(const GLfixed *m)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glMultiTexCoord4f(GLenum target, GLfloat s, GLfloat t, GLfloat r, GLfloat q)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glMultiTexCoord4x(GLenum target, GLfixed s, GLfixed t, GLfixed r, GLfixed q)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glNormal3f(GLfloat nx, GLfloat ny, GLfloat nz)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glNormal3x(GLfixed nx, GLfixed ny, GLfixed nz)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glNormalPointer(GLenum type, GLsizei stride, const GLvoid *pointer)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glOrthof(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);

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            context->ortho(left, right, bottom, top, zNear, zFar);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glOrthox(GLfixed left, GLfixed right, GLfixed bottom, GLfixed top, GLfixed zNear, GLfixed zFar)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glPixelStorei(GLenum pname, GLint param)
{
    TRACE("(GLenum pname = 0x%X, GLint param = %d)", pname, param);

    try
    {
        es1::Context *context = es1::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);
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glPointParameterf(GLenum pname, GLfloat param)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glPointParameterfv(GLenum pname, const GLfloat *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glPointParameterx(GLenum pname, GLfixed param)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glPointParameterxv(GLenum pname, const GLfixed *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glPointSize(GLfloat size)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glPointSizePointerOES(GLenum type, GLsizei stride, const GLvoid *pointer)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glPointSizex(GLfixed size)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glPolygonOffset(GLfloat factor, GLfloat units)
{
    TRACE("(GLfloat factor = %f, GLfloat units = %f)", factor, units);

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            context->setPolygonOffsetParams(factor, units);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glPolygonOffsetx(GLfixed factor, GLfixed units)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glPopMatrix(void)
{
	TRACE("()");
    
    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            context->popMatrix();
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glPushMatrix(void)
{
	TRACE("()");
    
    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            context->pushMatrix();
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

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);

    try
    {
        if(width < 0 || height < 0)
        {
            return error(GL_INVALID_VALUE);
        }

        if(!validReadFormatType(format, type))
        {
            return error(GL_INVALID_OPERATION);
        }

        es1::Context *context = es1::getContext();

        if(context)
        {
            context->readPixels(x, y, width, height, format, type, NULL, pixels);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glRenderbufferStorageOES(GLenum target, GLenum internalformat, GLsizei width, GLsizei height)
{
    TRACE("(GLenum target = 0x%X, GLenum internalformat = 0x%X, GLsizei width = %d, GLsizei height = %d)",
          target, internalformat, width, height);

    try
    {
        switch(target)
        {
        case GL_RENDERBUFFER_OES:
            break;
        default:
            return error(GL_INVALID_ENUM);
        }

        if(!es1::IsColorRenderable(internalformat) && !es1::IsDepthRenderable(internalformat) && !es1::IsStencilRenderable(internalformat))
        {
            return error(GL_INVALID_ENUM);
        }

        if(width < 0 || height < 0)
        {
            return error(GL_INVALID_VALUE);
        }

        es1::Context *context = es1::getContext();

        if(context)
        {
            if(width > es1::IMPLEMENTATION_MAX_RENDERBUFFER_SIZE || 
               height > es1::IMPLEMENTATION_MAX_RENDERBUFFER_SIZE)
            {
                return error(GL_INVALID_VALUE);
            }

            GLuint handle = context->getRenderbufferHandle();
            if(handle == 0)
            {
                return error(GL_INVALID_OPERATION);
            }

            switch(internalformat)
            {
            case GL_DEPTH_COMPONENT16_OES:
                context->setRenderbufferStorage(new es1::Depthbuffer(width, height, 0));
                break;
            case GL_RGBA4_OES:
            case GL_RGB5_A1_OES:
            case GL_RGB565_OES:
            case GL_RGB8_OES:
            case GL_RGBA8_OES:
                context->setRenderbufferStorage(new es1::Colorbuffer(width, height, internalformat, 0));
                break;
            case GL_STENCIL_INDEX8_OES:
                context->setRenderbufferStorage(new es1::Stencilbuffer(width, height, 0));
                break;
            case GL_DEPTH24_STENCIL8_OES:
                context->setRenderbufferStorage(new es1::DepthStencilbuffer(width, height, 0));
                break;
            default:
                return error(GL_INVALID_ENUM);
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glRotatef(GLfloat angle, GLfloat x, GLfloat y, GLfloat z)
{
	TRACE("(GLfloat angle = %f, GLfloat x = %f, GLfloat y = %f, GLfloat z = %f)", angle, x, y, z);
    
    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            context->rotate(angle, x, y, z);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glRotatex(GLfixed angle, GLfixed x, GLfixed y, GLfixed z)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glSampleCoverage(GLclampf value, GLboolean invert)
{
    TRACE("(GLclampf value = %f, GLboolean invert = %d)", value, invert);

    try
    {
        es1::Context* context = es1::getContext();

        if(context)
        {
            context->setSampleCoverageParams(es1::clamp01(value), invert == GL_TRUE);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glSampleCoveragex(GLclampx value, GLboolean invert)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glScalef(GLfloat x, GLfloat y, GLfloat z)
{
	TRACE("(GLfloat x = %f, GLfloat y = %f, GLfloat z = %f)", x, y, z);
    
    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            context->scale(x, y, z);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glScalex(GLfixed x, GLfixed y, GLfixed z)
{
	UNIMPLEMENTED();
}

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);

    try
    {
        if(width < 0 || height < 0)
        {
            return error(GL_INVALID_VALUE);
        }

        es1::Context* context = es1::getContext();

        if(context)
        {
            context->setScissorParams(x, y, width, height);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glShadeModel(GLenum mode)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glStencilFunc(GLenum func, GLint ref, GLuint mask)
{
    TRACE("(GLenum func = 0x%X, GLint ref = %d, GLuint mask = %d)",  func, ref, mask);

    try
    {
        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->setStencilParams(func, ref, mask);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glStencilMask(GLuint mask)
{
    TRACE("(GLuint mask = %d)", mask);

    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            context->setStencilWritemask(mask);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glStencilOp(GLenum fail, GLenum zfail, GLenum zpass)
{
    TRACE("(GLenum fail = 0x%X, GLenum zfail = 0x%X, GLenum zpas = 0x%Xs)", fail, zfail, zpass);

    try
    {
        switch(fail)
        {
          case GL_ZERO:
          case GL_KEEP:
          case GL_REPLACE:
          case GL_INCR:
          case GL_DECR:
          case GL_INVERT:
          case GL_INCR_WRAP_OES:
          case GL_DECR_WRAP_OES:
            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_OES:
          case GL_DECR_WRAP_OES:
            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_OES:
          case GL_DECR_WRAP_OES:
            break;
          default:
            return error(GL_INVALID_ENUM);
        }

        es1::Context *context = es1::getContext();

        if(context)
        {
            context->setStencilOperations(fail, zfail, zpass);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glTexCoordPointer(GLint size, GLenum type, GLsizei stride, const GLvoid *pointer)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glTexEnvf(GLenum target, GLenum pname, GLfloat param)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glTexEnvfv(GLenum target, GLenum pname, const GLfloat *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glTexEnvi(GLenum target, GLenum pname, GLint param)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glTexEnvx(GLenum target, GLenum pname, GLfixed param)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glTexEnviv(GLenum target, GLenum pname, const GLint *params)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glTexEnvxv(GLenum target, GLenum pname, const GLfixed *params)
{
	UNIMPLEMENTED();
}

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);

    try
    {
        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:
                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:
                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:
                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_COMPRESSED_RGB_S3TC_DXT1_EXT:  // error cases for compressed textures are handled below
        case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
            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);
        }

        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(format == GL_COMPRESSED_RGB_S3TC_DXT1_EXT ||
               format == GL_COMPRESSED_RGBA_S3TC_DXT1_EXT)
            {
                if(S3TC_SUPPORT)
                {
                    return error(GL_INVALID_OPERATION);
                }
                else
                {
                    return error(GL_INVALID_ENUM);
                }
            }
			
            if(target == GL_TEXTURE_2D)
            {
                es1::Texture2D *texture = context->getTexture2D();

                if(!texture)
                {
                    return error(GL_INVALID_OPERATION);
                }

                texture->setImage(level, width, height, format, type, context->getUnpackAlignment(), pixels);
            }
            else UNREACHABLE();
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

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);

    try
    {
        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_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);
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

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);

    try
    {
        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_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);
            }
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glTexParameteriv(GLenum target, GLenum pname, const GLint* params)
{
    glTexParameteri(target, pname, *params);
}

void GL_APIENTRY glTexParameterx(GLenum target, GLenum pname, GLfixed param)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glTexParameterxv(GLenum target, GLenum pname, const GLfixed *params)
{
	UNIMPLEMENTED();
}

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);

    try
    {
        if(!es1::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(!es1::CheckTextureFormatType(format, type))
        {
            return error(GL_INVALID_ENUM);
        }

        if(width == 0 || height == 0 || pixels == NULL)
        {
            return;
        }

        es1::Context *context = es1::getContext();

        if(context)
        {
            if(level > es1::IMPLEMENTATION_MAX_TEXTURE_LEVELS)
            {
                return error(GL_INVALID_VALUE);
            }

            if(target == GL_TEXTURE_2D)
            {
                es1::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 UNREACHABLE();
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glTranslatef(GLfloat x, GLfloat y, GLfloat z)
{
	TRACE("(GLfloat x = %f, GLfloat y = %f, GLfloat z = %f)", x, y, z);
    
    try
    {
        es1::Context *context = es1::getContext();

        if(context)
        {
            context->translate(x, y, z);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glTranslatex(GLfixed x, GLfixed y, GLfixed z)
{
	UNIMPLEMENTED();
}

void GL_APIENTRY glVertexPointer(GLint size, GLenum type, GLsizei stride, const GLvoid *pointer)
{
	UNIMPLEMENTED();
}

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);

    try
    {
        if(width < 0 || height < 0)
        {
            return error(GL_INVALID_VALUE);
        }

        es1::Context *context = es1::getContext();

        if(context)
        {
            context->setViewportParams(x, y, width, height);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

void GL_APIENTRY glEGLImageTargetTexture2DOES(GLenum target, GLeglImageOES image)
{
    TRACE("(GLenum target = 0x%X, GLeglImageOES image = 0x%0.8p)", target, image);

    try
    {
        switch(target)
        {
        case GL_TEXTURE_EXTERNAL_OES:
            break;
        default:
            return error(GL_INVALID_ENUM);
        }

        if(!image)
        {
            return error(GL_INVALID_OPERATION);
        }

        es1::Context *context = es1::getContext();

        if(context)
        {
            es1::TextureExternal *texture = context->getTextureExternal();

            if(!texture)
            {
                return error(GL_INVALID_OPERATION);
            }

            es1::Image *glImage = static_cast<es1::Image*>(image);

            texture->setImage(glImage);
        }
    }
    catch(std::bad_alloc&)
    {
        return error(GL_OUT_OF_MEMORY);
    }
}

__eglMustCastToProperFunctionPointerType glGetProcAddress(const char *procname)
{
    struct Extension
    {
        const char *name;
        __eglMustCastToProperFunctionPointerType address;
    };

    static const Extension glExtensions[] =
    {
        {"glEGLImageTargetTexture2DOES", (__eglMustCastToProperFunctionPointerType)glEGLImageTargetTexture2DOES},
		{"glIsRenderbufferOES", (__eglMustCastToProperFunctionPointerType)glIsRenderbufferOES},
		{"glBindRenderbufferOES", (__eglMustCastToProperFunctionPointerType)glBindRenderbufferOES},
		{"glDeleteRenderbuffersOES", (__eglMustCastToProperFunctionPointerType)glDeleteRenderbuffersOES},
		{"glGenRenderbuffersOES", (__eglMustCastToProperFunctionPointerType)glGenRenderbuffersOES},
		{"glRenderbufferStorageOES", (__eglMustCastToProperFunctionPointerType)glRenderbufferStorageOES},
		{"glGetRenderbufferParameterivOES", (__eglMustCastToProperFunctionPointerType)glGetRenderbufferParameterivOES},
		{"glIsFramebufferOES", (__eglMustCastToProperFunctionPointerType)glIsFramebufferOES},
		{"glBindFramebufferOES", (__eglMustCastToProperFunctionPointerType)glBindFramebufferOES},
		{"glDeleteFramebuffersOES", (__eglMustCastToProperFunctionPointerType)glDeleteFramebuffersOES},
		{"glGenFramebuffersOES", (__eglMustCastToProperFunctionPointerType)glGenFramebuffersOES},
		{"glCheckFramebufferStatusOES", (__eglMustCastToProperFunctionPointerType)glCheckFramebufferStatusOES},
		{"glFramebufferRenderbufferOES", (__eglMustCastToProperFunctionPointerType)glFramebufferRenderbufferOES},
		{"glFramebufferTexture2DOES", (__eglMustCastToProperFunctionPointerType)glFramebufferTexture2DOES},
		{"glGetFramebufferAttachmentParameterivOES", (__eglMustCastToProperFunctionPointerType)glGetFramebufferAttachmentParameterivOES},
		{"glGenerateMipmapOES", (__eglMustCastToProperFunctionPointerType)glGenerateMipmapOES},
		{"glBlendEquationSeparateOES", (__eglMustCastToProperFunctionPointerType)glBlendEquationSeparateOES},
		{"glBlendFuncSeparateOES", (__eglMustCastToProperFunctionPointerType)glBlendFuncSeparateOES},
		{"glPointSizePointerOES", (__eglMustCastToProperFunctionPointerType)glPointSizePointerOES}
    };

    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);
}

}