/*
 * Copyright (C) 2009 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

typedef unsigned long  GLenum;
typedef boolean        GLboolean;
typedef unsigned long  GLbitfield;
typedef byte           GLbyte;         /* 'byte' should be a signed 8 bit type. */
typedef short          GLshort;
typedef long           GLint;
typedef long           GLsizei;
typedef long long      GLintptr;
typedef long long      GLsizeiptr;
typedef octet          GLubyte;        /* 'octet' should be an unsigned 8 bit type. */
typedef unsigned short GLushort;
typedef unsigned long  GLuint;
typedef /*unrestricted*/ float GLfloat;
typedef /*unrestricted*/ float GLclampf;

[
    Conditional=WEBGL,
    DoNotCheckConstants
] interface WebGLRenderingContext : CanvasRenderingContext {

    /* ClearBufferMask */
    const GLenum DEPTH_BUFFER_BIT               = 0x00000100;
    const GLenum STENCIL_BUFFER_BIT             = 0x00000400;
    const GLenum COLOR_BUFFER_BIT               = 0x00004000;

    /* BeginMode */
    const GLenum POINTS                         = 0x0000;
    const GLenum LINES                          = 0x0001;
    const GLenum LINE_LOOP                      = 0x0002;
    const GLenum LINE_STRIP                     = 0x0003;
    const GLenum TRIANGLES                      = 0x0004;
    const GLenum TRIANGLE_STRIP                 = 0x0005;
    const GLenum TRIANGLE_FAN                   = 0x0006;

    /* AlphaFunction (not supported in ES20) */
    /*      NEVER */
    /*      LESS */
    /*      EQUAL */
    /*      LEQUAL */
    /*      GREATER */
    /*      NOTEQUAL */
    /*      GEQUAL */
    /*      ALWAYS */

    /* BlendingFactorDest */
    const GLenum ZERO                           = 0;
    const GLenum ONE                            = 1;
    const GLenum SRC_COLOR                      = 0x0300;
    const GLenum ONE_MINUS_SRC_COLOR            = 0x0301;
    const GLenum SRC_ALPHA                      = 0x0302;
    const GLenum ONE_MINUS_SRC_ALPHA            = 0x0303;
    const GLenum DST_ALPHA                      = 0x0304;
    const GLenum ONE_MINUS_DST_ALPHA            = 0x0305;

    /* BlendingFactorSrc */
    /*      ZERO */
    /*      ONE */
    const GLenum DST_COLOR                      = 0x0306;
    const GLenum ONE_MINUS_DST_COLOR            = 0x0307;
    const GLenum SRC_ALPHA_SATURATE             = 0x0308;
    /*      SRC_ALPHA */
    /*      ONE_MINUS_SRC_ALPHA */
    /*      DST_ALPHA */
    /*      ONE_MINUS_DST_ALPHA */

    /* BlendEquationSeparate */
    const GLenum FUNC_ADD                       = 0x8006;
    const GLenum BLEND_EQUATION                 = 0x8009;
    const GLenum BLEND_EQUATION_RGB             = 0x8009;   /* same as BLEND_EQUATION */
    const GLenum BLEND_EQUATION_ALPHA           = 0x883D;

    /* BlendSubtract */
    const GLenum FUNC_SUBTRACT                  = 0x800A;
    const GLenum FUNC_REVERSE_SUBTRACT          = 0x800B;

    /* Separate Blend Functions */
    const GLenum BLEND_DST_RGB                  = 0x80C8;
    const GLenum BLEND_SRC_RGB                  = 0x80C9;
    const GLenum BLEND_DST_ALPHA                = 0x80CA;
    const GLenum BLEND_SRC_ALPHA                = 0x80CB;
    const GLenum CONSTANT_COLOR                 = 0x8001;
    const GLenum ONE_MINUS_CONSTANT_COLOR       = 0x8002;
    const GLenum CONSTANT_ALPHA                 = 0x8003;
    const GLenum ONE_MINUS_CONSTANT_ALPHA       = 0x8004;
    const GLenum BLEND_COLOR                    = 0x8005;

    /* Buffer Objects */
    const GLenum ARRAY_BUFFER                   = 0x8892;
    const GLenum ELEMENT_ARRAY_BUFFER           = 0x8893;
    const GLenum ARRAY_BUFFER_BINDING           = 0x8894;
    const GLenum ELEMENT_ARRAY_BUFFER_BINDING   = 0x8895;

    const GLenum STREAM_DRAW                    = 0x88E0;
    const GLenum STATIC_DRAW                    = 0x88E4;
    const GLenum DYNAMIC_DRAW                   = 0x88E8;

    const GLenum BUFFER_SIZE                    = 0x8764;
    const GLenum BUFFER_USAGE                   = 0x8765;

    const GLenum CURRENT_VERTEX_ATTRIB          = 0x8626;

    /* CullFaceMode */
    const GLenum FRONT                          = 0x0404;
    const GLenum BACK                           = 0x0405;
    const GLenum FRONT_AND_BACK                 = 0x0408;

    /* DepthFunction */
    /*      NEVER */
    /*      LESS */
    /*      EQUAL */
    /*      LEQUAL */
    /*      GREATER */
    /*      NOTEQUAL */
    /*      GEQUAL */
    /*      ALWAYS */

    /* EnableCap */
    const GLenum TEXTURE_2D                     = 0x0DE1;
    const GLenum CULL_FACE                      = 0x0B44;
    const GLenum BLEND                          = 0x0BE2;
    const GLenum DITHER                         = 0x0BD0;
    const GLenum STENCIL_TEST                   = 0x0B90;
    const GLenum DEPTH_TEST                     = 0x0B71;
    const GLenum SCISSOR_TEST                   = 0x0C11;
    const GLenum POLYGON_OFFSET_FILL            = 0x8037;
    const GLenum SAMPLE_ALPHA_TO_COVERAGE       = 0x809E;
    const GLenum SAMPLE_COVERAGE                = 0x80A0;

    /* ErrorCode */
    const GLenum NO_ERROR                       = 0;
    const GLenum INVALID_ENUM                   = 0x0500;
    const GLenum INVALID_VALUE                  = 0x0501;
    const GLenum INVALID_OPERATION              = 0x0502;
    const GLenum OUT_OF_MEMORY                  = 0x0505;

    /* FrontFaceDirection */
    const GLenum CW                             = 0x0900;
    const GLenum CCW                            = 0x0901;

    /* GetPName */
    const GLenum LINE_WIDTH                     = 0x0B21;
    const GLenum ALIASED_POINT_SIZE_RANGE       = 0x846D;
    const GLenum ALIASED_LINE_WIDTH_RANGE       = 0x846E;
    const GLenum CULL_FACE_MODE                 = 0x0B45;
    const GLenum FRONT_FACE                     = 0x0B46;
    const GLenum DEPTH_RANGE                    = 0x0B70;
    const GLenum DEPTH_WRITEMASK                = 0x0B72;
    const GLenum DEPTH_CLEAR_VALUE              = 0x0B73;
    const GLenum DEPTH_FUNC                     = 0x0B74;
    const GLenum STENCIL_CLEAR_VALUE            = 0x0B91;
    const GLenum STENCIL_FUNC                   = 0x0B92;
    const GLenum STENCIL_FAIL                   = 0x0B94;
    const GLenum STENCIL_PASS_DEPTH_FAIL        = 0x0B95;
    const GLenum STENCIL_PASS_DEPTH_PASS        = 0x0B96;
    const GLenum STENCIL_REF                    = 0x0B97;
    const GLenum STENCIL_VALUE_MASK             = 0x0B93;
    const GLenum STENCIL_WRITEMASK              = 0x0B98;
    const GLenum STENCIL_BACK_FUNC              = 0x8800;
    const GLenum STENCIL_BACK_FAIL              = 0x8801;
    const GLenum STENCIL_BACK_PASS_DEPTH_FAIL   = 0x8802;
    const GLenum STENCIL_BACK_PASS_DEPTH_PASS   = 0x8803;
    const GLenum STENCIL_BACK_REF               = 0x8CA3;
    const GLenum STENCIL_BACK_VALUE_MASK        = 0x8CA4;
    const GLenum STENCIL_BACK_WRITEMASK         = 0x8CA5;
    const GLenum VIEWPORT                       = 0x0BA2;
    const GLenum SCISSOR_BOX                    = 0x0C10;
    /*      SCISSOR_TEST */
    const GLenum COLOR_CLEAR_VALUE              = 0x0C22;
    const GLenum COLOR_WRITEMASK                = 0x0C23;
    const GLenum UNPACK_ALIGNMENT               = 0x0CF5;
    const GLenum PACK_ALIGNMENT                 = 0x0D05;
    const GLenum MAX_TEXTURE_SIZE               = 0x0D33;
    const GLenum MAX_VIEWPORT_DIMS              = 0x0D3A;
    const GLenum SUBPIXEL_BITS                  = 0x0D50;
    const GLenum RED_BITS                       = 0x0D52;
    const GLenum GREEN_BITS                     = 0x0D53;
    const GLenum BLUE_BITS                      = 0x0D54;
    const GLenum ALPHA_BITS                     = 0x0D55;
    const GLenum DEPTH_BITS                     = 0x0D56;
    const GLenum STENCIL_BITS                   = 0x0D57;
    const GLenum POLYGON_OFFSET_UNITS           = 0x2A00;
    /*      POLYGON_OFFSET_FILL */
    const GLenum POLYGON_OFFSET_FACTOR          = 0x8038;
    const GLenum TEXTURE_BINDING_2D             = 0x8069;
    const GLenum SAMPLE_BUFFERS                 = 0x80A8;
    const GLenum SAMPLES                        = 0x80A9;
    const GLenum SAMPLE_COVERAGE_VALUE          = 0x80AA;
    const GLenum SAMPLE_COVERAGE_INVERT         = 0x80AB;

    /* GetTextureParameter */
    /*      TEXTURE_MAG_FILTER */
    /*      TEXTURE_MIN_FILTER */
    /*      TEXTURE_WRAP_S */
    /*      TEXTURE_WRAP_T */

    const GLenum COMPRESSED_TEXTURE_FORMATS     = 0x86A3;

    /* HintMode */
    const GLenum DONT_CARE                      = 0x1100;
    const GLenum FASTEST                        = 0x1101;
    const GLenum NICEST                         = 0x1102;

    /* HintTarget */
    const GLenum GENERATE_MIPMAP_HINT            = 0x8192;

    /* DataType */
    const GLenum BYTE                           = 0x1400;
    const GLenum UNSIGNED_BYTE                  = 0x1401;
    const GLenum SHORT                          = 0x1402;
    const GLenum UNSIGNED_SHORT                 = 0x1403;
    const GLenum INT                            = 0x1404;
    const GLenum UNSIGNED_INT                   = 0x1405;
    const GLenum FLOAT                          = 0x1406;
    const GLenum HALF_FLOAT_OES                 = 0x8D61;

    /* PixelFormat */
    const GLenum DEPTH_COMPONENT                = 0x1902;
    const GLenum ALPHA                          = 0x1906;
    const GLenum RGB                            = 0x1907;
    const GLenum RGBA                           = 0x1908;
    const GLenum LUMINANCE                      = 0x1909;
    const GLenum LUMINANCE_ALPHA                = 0x190A;

    /* PixelType */
    /*      UNSIGNED_BYTE */
    const GLenum UNSIGNED_SHORT_4_4_4_4         = 0x8033;
    const GLenum UNSIGNED_SHORT_5_5_5_1         = 0x8034;
    const GLenum UNSIGNED_SHORT_5_6_5           = 0x8363;

    /* Shaders */
    const GLenum FRAGMENT_SHADER                  = 0x8B30;
    const GLenum VERTEX_SHADER                    = 0x8B31;
    const GLenum MAX_VERTEX_ATTRIBS               = 0x8869;
    const GLenum MAX_VERTEX_UNIFORM_VECTORS       = 0x8DFB;
    const GLenum MAX_VARYING_VECTORS              = 0x8DFC;
    const GLenum MAX_COMBINED_TEXTURE_IMAGE_UNITS = 0x8B4D;
    const GLenum MAX_VERTEX_TEXTURE_IMAGE_UNITS   = 0x8B4C;
    const GLenum MAX_TEXTURE_IMAGE_UNITS          = 0x8872;
    const GLenum MAX_FRAGMENT_UNIFORM_VECTORS     = 0x8DFD;
    const GLenum SHADER_TYPE                      = 0x8B4F;
    const GLenum DELETE_STATUS                    = 0x8B80;
    const GLenum LINK_STATUS                      = 0x8B82;
    const GLenum VALIDATE_STATUS                  = 0x8B83;
    const GLenum ATTACHED_SHADERS                 = 0x8B85;
    const GLenum ACTIVE_UNIFORMS                  = 0x8B86;
    const GLenum ACTIVE_ATTRIBUTES                = 0x8B89;
    const GLenum SHADING_LANGUAGE_VERSION         = 0x8B8C;
    const GLenum CURRENT_PROGRAM                  = 0x8B8D;

    /* StencilFunction */
    const GLenum NEVER                          = 0x0200;
    const GLenum LESS                           = 0x0201;
    const GLenum EQUAL                          = 0x0202;
    const GLenum LEQUAL                         = 0x0203;
    const GLenum GREATER                        = 0x0204;
    const GLenum NOTEQUAL                       = 0x0205;
    const GLenum GEQUAL                         = 0x0206;
    const GLenum ALWAYS                         = 0x0207;

    /* StencilOp */
    /*      ZERO */
    const GLenum KEEP                           = 0x1E00;
    const GLenum REPLACE                        = 0x1E01;
    const GLenum INCR                           = 0x1E02;
    const GLenum DECR                           = 0x1E03;
    const GLenum INVERT                         = 0x150A;
    const GLenum INCR_WRAP                      = 0x8507;
    const GLenum DECR_WRAP                      = 0x8508;

    /* StringName */
    const GLenum VENDOR                         = 0x1F00;
    const GLenum RENDERER                       = 0x1F01;
    const GLenum VERSION                        = 0x1F02;

    /* TextureMagFilter */
    const GLenum NEAREST                        = 0x2600;
    const GLenum LINEAR                         = 0x2601;

    /* TextureMinFilter */
    /*      NEAREST */
    /*      LINEAR */
    const GLenum NEAREST_MIPMAP_NEAREST         = 0x2700;
    const GLenum LINEAR_MIPMAP_NEAREST          = 0x2701;
    const GLenum NEAREST_MIPMAP_LINEAR          = 0x2702;
    const GLenum LINEAR_MIPMAP_LINEAR           = 0x2703;

    /* TextureParameterName */
    const GLenum TEXTURE_MAG_FILTER             = 0x2800;
    const GLenum TEXTURE_MIN_FILTER             = 0x2801;
    const GLenum TEXTURE_WRAP_S                 = 0x2802;
    const GLenum TEXTURE_WRAP_T                 = 0x2803;

    /* TextureTarget */
    /*      TEXTURE_2D */
    const GLenum TEXTURE                        = 0x1702;

    const GLenum TEXTURE_CUBE_MAP               = 0x8513;
    const GLenum TEXTURE_BINDING_CUBE_MAP       = 0x8514;
    const GLenum TEXTURE_CUBE_MAP_POSITIVE_X    = 0x8515;
    const GLenum TEXTURE_CUBE_MAP_NEGATIVE_X    = 0x8516;
    const GLenum TEXTURE_CUBE_MAP_POSITIVE_Y    = 0x8517;
    const GLenum TEXTURE_CUBE_MAP_NEGATIVE_Y    = 0x8518;
    const GLenum TEXTURE_CUBE_MAP_POSITIVE_Z    = 0x8519;
    const GLenum TEXTURE_CUBE_MAP_NEGATIVE_Z    = 0x851A;
    const GLenum MAX_CUBE_MAP_TEXTURE_SIZE      = 0x851C;

    /* TextureUnit */
    const GLenum TEXTURE0                       = 0x84C0;
    const GLenum TEXTURE1                       = 0x84C1;
    const GLenum TEXTURE2                       = 0x84C2;
    const GLenum TEXTURE3                       = 0x84C3;
    const GLenum TEXTURE4                       = 0x84C4;
    const GLenum TEXTURE5                       = 0x84C5;
    const GLenum TEXTURE6                       = 0x84C6;
    const GLenum TEXTURE7                       = 0x84C7;
    const GLenum TEXTURE8                       = 0x84C8;
    const GLenum TEXTURE9                       = 0x84C9;
    const GLenum TEXTURE10                      = 0x84CA;
    const GLenum TEXTURE11                      = 0x84CB;
    const GLenum TEXTURE12                      = 0x84CC;
    const GLenum TEXTURE13                      = 0x84CD;
    const GLenum TEXTURE14                      = 0x84CE;
    const GLenum TEXTURE15                      = 0x84CF;
    const GLenum TEXTURE16                      = 0x84D0;
    const GLenum TEXTURE17                      = 0x84D1;
    const GLenum TEXTURE18                      = 0x84D2;
    const GLenum TEXTURE19                      = 0x84D3;
    const GLenum TEXTURE20                      = 0x84D4;
    const GLenum TEXTURE21                      = 0x84D5;
    const GLenum TEXTURE22                      = 0x84D6;
    const GLenum TEXTURE23                      = 0x84D7;
    const GLenum TEXTURE24                      = 0x84D8;
    const GLenum TEXTURE25                      = 0x84D9;
    const GLenum TEXTURE26                      = 0x84DA;
    const GLenum TEXTURE27                      = 0x84DB;
    const GLenum TEXTURE28                      = 0x84DC;
    const GLenum TEXTURE29                      = 0x84DD;
    const GLenum TEXTURE30                      = 0x84DE;
    const GLenum TEXTURE31                      = 0x84DF;
    const GLenum ACTIVE_TEXTURE                 = 0x84E0;

    /* TextureWrapMode */
    const GLenum REPEAT                         = 0x2901;
    const GLenum CLAMP_TO_EDGE                  = 0x812F;
    const GLenum MIRRORED_REPEAT                = 0x8370;

    /* Uniform Types */
    const GLenum FLOAT_VEC2                     = 0x8B50;
    const GLenum FLOAT_VEC3                     = 0x8B51;
    const GLenum FLOAT_VEC4                     = 0x8B52;
    const GLenum INT_VEC2                       = 0x8B53;
    const GLenum INT_VEC3                       = 0x8B54;
    const GLenum INT_VEC4                       = 0x8B55;
    const GLenum BOOL                           = 0x8B56;
    const GLenum BOOL_VEC2                      = 0x8B57;
    const GLenum BOOL_VEC3                      = 0x8B58;
    const GLenum BOOL_VEC4                      = 0x8B59;
    const GLenum FLOAT_MAT2                     = 0x8B5A;
    const GLenum FLOAT_MAT3                     = 0x8B5B;
    const GLenum FLOAT_MAT4                     = 0x8B5C;
    const GLenum SAMPLER_2D                     = 0x8B5E;
    const GLenum SAMPLER_CUBE                   = 0x8B60;

    /* Vertex Arrays */
    const GLenum VERTEX_ATTRIB_ARRAY_ENABLED        = 0x8622;
    const GLenum VERTEX_ATTRIB_ARRAY_SIZE           = 0x8623;
    const GLenum VERTEX_ATTRIB_ARRAY_STRIDE         = 0x8624;
    const GLenum VERTEX_ATTRIB_ARRAY_TYPE           = 0x8625;
    const GLenum VERTEX_ATTRIB_ARRAY_NORMALIZED     = 0x886A;
    const GLenum VERTEX_ATTRIB_ARRAY_POINTER        = 0x8645;
    const GLenum VERTEX_ATTRIB_ARRAY_BUFFER_BINDING = 0x889F;

    /* Shader Source */
    const GLenum COMPILE_STATUS                 = 0x8B81;

    /* Shader Precision-Specified Types */
    const GLenum LOW_FLOAT                      = 0x8DF0;
    const GLenum MEDIUM_FLOAT                   = 0x8DF1;
    const GLenum HIGH_FLOAT                     = 0x8DF2;
    const GLenum LOW_INT                        = 0x8DF3;
    const GLenum MEDIUM_INT                     = 0x8DF4;
    const GLenum HIGH_INT                       = 0x8DF5;

    /* Framebuffer Object. */
    const GLenum FRAMEBUFFER                    = 0x8D40;
    const GLenum RENDERBUFFER                   = 0x8D41;

    const GLenum RGBA4                          = 0x8056;
    const GLenum RGB5_A1                        = 0x8057;
    const GLenum RGB565                         = 0x8D62;
    const GLenum DEPTH_COMPONENT16              = 0x81A5;
    const GLenum STENCIL_INDEX                  = 0x1901;
    const GLenum STENCIL_INDEX8                 = 0x8D48;
    const GLenum DEPTH_STENCIL                  = 0x84F9;

    const GLenum RENDERBUFFER_WIDTH             = 0x8D42;
    const GLenum RENDERBUFFER_HEIGHT            = 0x8D43;
    const GLenum RENDERBUFFER_INTERNAL_FORMAT   = 0x8D44;
    const GLenum RENDERBUFFER_RED_SIZE          = 0x8D50;
    const GLenum RENDERBUFFER_GREEN_SIZE        = 0x8D51;
    const GLenum RENDERBUFFER_BLUE_SIZE         = 0x8D52;
    const GLenum RENDERBUFFER_ALPHA_SIZE        = 0x8D53;
    const GLenum RENDERBUFFER_DEPTH_SIZE        = 0x8D54;
    const GLenum RENDERBUFFER_STENCIL_SIZE      = 0x8D55;

    const GLenum FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE           = 0x8CD0;
    const GLenum FRAMEBUFFER_ATTACHMENT_OBJECT_NAME           = 0x8CD1;
    const GLenum FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL         = 0x8CD2;
    const GLenum FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE = 0x8CD3;

    const GLenum COLOR_ATTACHMENT0              = 0x8CE0;
    const GLenum DEPTH_ATTACHMENT               = 0x8D00;
    const GLenum STENCIL_ATTACHMENT             = 0x8D20;
    const GLenum DEPTH_STENCIL_ATTACHMENT       = 0x821A;

    const GLenum NONE                           = 0;

    const GLenum FRAMEBUFFER_COMPLETE                      = 0x8CD5;
    const GLenum FRAMEBUFFER_INCOMPLETE_ATTACHMENT         = 0x8CD6;
    const GLenum FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT = 0x8CD7;
    const GLenum FRAMEBUFFER_INCOMPLETE_DIMENSIONS         = 0x8CD9;
    const GLenum FRAMEBUFFER_UNSUPPORTED                   = 0x8CDD;

    const GLenum FRAMEBUFFER_BINDING            = 0x8CA6;
    const GLenum RENDERBUFFER_BINDING           = 0x8CA7;
    const GLenum MAX_RENDERBUFFER_SIZE          = 0x84E8;

    const GLenum INVALID_FRAMEBUFFER_OPERATION  = 0x0506;

    /* WebGL-specific enums */
    const GLenum UNPACK_FLIP_Y_WEBGL                = 0x9240;
    const GLenum UNPACK_PREMULTIPLY_ALPHA_WEBGL     = 0x9241;
    const GLenum CONTEXT_LOST_WEBGL                 = 0x9242;
    const GLenum UNPACK_COLORSPACE_CONVERSION_WEBGL = 0x9243;
    const GLenum BROWSER_DEFAULT_WEBGL              = 0x9244;

    readonly attribute GLsizei drawingBufferWidth;
    readonly attribute GLsizei drawingBufferHeight;

    [StrictTypeChecking] void         activeTexture(in GLenum texture) raises(DOMException);
    [StrictTypeChecking] void         attachShader(in WebGLProgram program, in WebGLShader shader) raises(DOMException);
    [StrictTypeChecking] void         bindAttribLocation(in WebGLProgram program, in GLuint index, in DOMString name) raises(DOMException);
    [StrictTypeChecking] void         bindBuffer(in GLenum target, in WebGLBuffer buffer) raises(DOMException);
    [StrictTypeChecking] void         bindFramebuffer(in GLenum target, in WebGLFramebuffer framebuffer) raises(DOMException);
    [StrictTypeChecking] void         bindRenderbuffer(in GLenum target, in WebGLRenderbuffer renderbuffer) raises(DOMException);
    [StrictTypeChecking] void         bindTexture(in GLenum target, in WebGLTexture texture) raises(DOMException);
    [StrictTypeChecking] void         blendColor(in GLclampf red, in GLclampf green, in GLclampf blue, in GLclampf alpha);
    [StrictTypeChecking] void         blendEquation(in GLenum mode);
    [StrictTypeChecking] void         blendEquationSeparate(in GLenum modeRGB, in GLenum modeAlpha);
    [StrictTypeChecking] void         blendFunc(in GLenum sfactor, in GLenum dfactor);
    [StrictTypeChecking] void         blendFuncSeparate(in GLenum srcRGB, in GLenum dstRGB, in GLenum srcAlpha, in GLenum dstAlpha);
    [StrictTypeChecking] void         bufferData(in GLenum target, in ArrayBuffer? data, in GLenum usage) raises (DOMException);
    [StrictTypeChecking] void         bufferData(in GLenum target, in ArrayBufferView? data, in GLenum usage) raises (DOMException);
    [StrictTypeChecking] void         bufferData(in GLenum target, in GLsizeiptr size, in GLenum usage) raises (DOMException);
    [StrictTypeChecking] void         bufferSubData(in GLenum target, in GLintptr offset, in ArrayBuffer? data) raises (DOMException);
    [StrictTypeChecking] void         bufferSubData(in GLenum target, in GLintptr offset, in ArrayBufferView? data) raises (DOMException);

    [StrictTypeChecking] GLenum       checkFramebufferStatus(in GLenum target);
    [StrictTypeChecking] void         clear(in GLbitfield mask);
    [StrictTypeChecking] void         clearColor(in GLclampf red, in GLclampf green, in GLclampf blue, in GLclampf alpha);
    [StrictTypeChecking] void         clearDepth(in GLclampf depth);
    [StrictTypeChecking] void         clearStencil(in GLint s);
    [StrictTypeChecking] void         colorMask(in GLboolean red, in GLboolean green, in GLboolean blue, in GLboolean alpha);
    [StrictTypeChecking] void         compileShader(in WebGLShader shader) raises(DOMException);

    [StrictTypeChecking] void         compressedTexImage2D(in GLenum target, in GLint level, in GLenum internalformat,
                                                           in GLsizei width, in GLsizei height, in GLint border, in ArrayBufferView data);
    [StrictTypeChecking] void         compressedTexSubImage2D(in GLenum target, in GLint level, in GLint xoffset, in GLint yoffset,
                                                              in GLsizei width, in GLsizei height, in GLenum format, in ArrayBufferView data);
    
    [StrictTypeChecking] void         copyTexImage2D(in GLenum target, in GLint level, in GLenum internalformat, in GLint x, in GLint y, in GLsizei width, in GLsizei height, in GLint border);
    [StrictTypeChecking] void         copyTexSubImage2D(in GLenum target, in GLint level, in GLint xoffset, in GLint yoffset, in GLint x, in GLint y, in GLsizei width, in GLsizei height);

    [StrictTypeChecking] WebGLBuffer createBuffer();
    [StrictTypeChecking] WebGLFramebuffer createFramebuffer();
    [StrictTypeChecking] WebGLProgram createProgram();
    [StrictTypeChecking] WebGLRenderbuffer createRenderbuffer();
    [StrictTypeChecking] WebGLShader createShader(in GLenum type) raises(DOMException);
    [StrictTypeChecking] WebGLTexture createTexture();

    [StrictTypeChecking] void         cullFace(in GLenum mode);

    [StrictTypeChecking] void         deleteBuffer(in WebGLBuffer buffer);
    [StrictTypeChecking] void         deleteFramebuffer(in WebGLFramebuffer framebuffer);
    [StrictTypeChecking] void         deleteProgram(in WebGLProgram program);
    [StrictTypeChecking] void         deleteRenderbuffer(in WebGLRenderbuffer renderbuffer);
    [StrictTypeChecking] void         deleteShader(in WebGLShader shader);
    [StrictTypeChecking] void         deleteTexture(in WebGLTexture texture);

    [StrictTypeChecking] void         depthFunc(in GLenum func);
    [StrictTypeChecking] void         depthMask(in GLboolean flag);
    [StrictTypeChecking] void         depthRange(in GLclampf zNear, in GLclampf zFar);
    [StrictTypeChecking] void         detachShader(in WebGLProgram program, in WebGLShader shader) raises(DOMException);
    [StrictTypeChecking] void         disable(in GLenum cap);
    [StrictTypeChecking] void         disableVertexAttribArray(in GLuint index) raises(DOMException);
    [StrictTypeChecking] void         drawArrays(in GLenum mode, in GLint first, in GLsizei count) raises(DOMException);
    [StrictTypeChecking] void         drawElements(in GLenum mode, in GLsizei count, in GLenum type, in GLintptr offset) raises(DOMException);

    [StrictTypeChecking] void         enable(in GLenum cap);
    [StrictTypeChecking] void         enableVertexAttribArray(in GLuint index) raises(DOMException);
    [StrictTypeChecking] void         finish();
    [StrictTypeChecking] void         flush();
    [StrictTypeChecking] void         framebufferRenderbuffer(in GLenum target, in GLenum attachment, in GLenum renderbuffertarget, in WebGLRenderbuffer renderbuffer) raises(DOMException);
    [StrictTypeChecking] void         framebufferTexture2D(in GLenum target, in GLenum attachment, in GLenum textarget, in WebGLTexture texture, in GLint level) raises(DOMException);
    [StrictTypeChecking] void         frontFace(in GLenum mode);
    [StrictTypeChecking] void         generateMipmap(in GLenum target);
    
    [StrictTypeChecking] WebGLActiveInfo getActiveAttrib(in WebGLProgram program, in GLuint index) raises (DOMException);
    [StrictTypeChecking] WebGLActiveInfo getActiveUniform(in WebGLProgram program, in GLuint index) raises (DOMException);

    [StrictTypeChecking, Custom] void getAttachedShaders(in WebGLProgram program) raises (DOMException);

    [StrictTypeChecking] GLint        getAttribLocation(in WebGLProgram program, in DOMString name);

    [StrictTypeChecking, Custom] any getBufferParameter(in GLenum target, in GLenum pname);

    [StrictTypeChecking] WebGLContextAttributes getContextAttributes();

    [StrictTypeChecking] GLenum getError();

    // object getExtension(in DOMString name);
    [StrictTypeChecking, Custom] any getExtension(in DOMString name);

    [StrictTypeChecking, Custom] any getFramebufferAttachmentParameter(in GLenum target, in GLenum attachment, in GLenum pname) raises(DOMException);
    [StrictTypeChecking, Custom] any getParameter(in GLenum pname) raises(DOMException);
    [StrictTypeChecking, Custom] any getProgramParameter(in WebGLProgram program, in GLenum pname) raises(DOMException);
    [StrictTypeChecking, TreatReturnedNullStringAs=Null] DOMString getProgramInfoLog(in WebGLProgram program) raises(DOMException);
    [StrictTypeChecking, Custom] any getRenderbufferParameter(in GLenum target, in GLenum pname) raises(DOMException);
    [StrictTypeChecking, Custom] any getShaderParameter(in WebGLShader shader, in GLenum pname) raises(DOMException);

    [StrictTypeChecking, TreatReturnedNullStringAs=Null] DOMString    getShaderInfoLog(in WebGLShader shader) raises(DOMException);

    [StrictTypeChecking] WebGLShaderPrecisionFormat getShaderPrecisionFormat(in GLenum shadertype, in GLenum precisiontype) raises(DOMException);

    [StrictTypeChecking, TreatReturnedNullStringAs=Null] DOMString    getShaderSource(in WebGLShader shader) raises(DOMException);

    [StrictTypeChecking, Custom] sequence<DOMString> getSupportedExtensions();

    [StrictTypeChecking, Custom] any getTexParameter(in GLenum target, in GLenum pname) raises(DOMException);

    [StrictTypeChecking, Custom] any getUniform(in WebGLProgram program, in WebGLUniformLocation location) raises(DOMException);

    [StrictTypeChecking] WebGLUniformLocation getUniformLocation(in WebGLProgram program, in DOMString name) raises(DOMException);

    [StrictTypeChecking, Custom] any getVertexAttrib(in GLuint index, in GLenum pname) raises(DOMException);

    [StrictTypeChecking] GLsizeiptr getVertexAttribOffset(in GLuint index, in GLenum pname);

    [StrictTypeChecking] void         hint(in GLenum target, in GLenum mode);
    [StrictTypeChecking] GLboolean    isBuffer(in WebGLBuffer buffer);
    [StrictTypeChecking] GLboolean    isContextLost();
    [StrictTypeChecking] GLboolean    isEnabled(in GLenum cap);
    [StrictTypeChecking] GLboolean    isFramebuffer(in WebGLFramebuffer framebuffer);
    [StrictTypeChecking] GLboolean    isProgram(in WebGLProgram program);
    [StrictTypeChecking] GLboolean    isRenderbuffer(in WebGLRenderbuffer renderbuffer);
    [StrictTypeChecking] GLboolean    isShader(in WebGLShader shader);
    [StrictTypeChecking] GLboolean    isTexture(in WebGLTexture texture);
    [StrictTypeChecking] void         lineWidth(in GLfloat width);
    [StrictTypeChecking] void         linkProgram(in WebGLProgram program) raises(DOMException);
    [StrictTypeChecking] void         pixelStorei(in GLenum pname, in GLint param);
    [StrictTypeChecking] void         polygonOffset(in GLfloat factor, in GLfloat units);

    [StrictTypeChecking] void         readPixels(in GLint x, in GLint y, in GLsizei width, in GLsizei height, in GLenum format, in GLenum type, in ArrayBufferView pixels) raises(DOMException);
    
    [StrictTypeChecking] void         releaseShaderCompiler();
    [StrictTypeChecking] void         renderbufferStorage(in GLenum target, in GLenum internalformat, in GLsizei width, in GLsizei height);
    [StrictTypeChecking] void         sampleCoverage(in GLclampf value, in GLboolean invert);
    [StrictTypeChecking] void         scissor(in GLint x, in GLint y, in GLsizei width, in GLsizei height);
    [StrictTypeChecking] void         shaderSource(in WebGLShader shader, in DOMString string) raises(DOMException);
    [StrictTypeChecking] void         stencilFunc(in GLenum func, in GLint ref, in GLuint mask);
    [StrictTypeChecking] void         stencilFuncSeparate(in GLenum face, in GLenum func, in GLint ref, in GLuint mask);
    [StrictTypeChecking] void         stencilMask(in GLuint mask);
    [StrictTypeChecking] void         stencilMaskSeparate(in GLenum face, in GLuint mask);
    [StrictTypeChecking] void         stencilOp(in GLenum fail, in GLenum zfail, in GLenum zpass);
    [StrictTypeChecking] void         stencilOpSeparate(in GLenum face, in GLenum fail, in GLenum zfail, in GLenum zpass);

    [StrictTypeChecking] void         texParameterf(in GLenum target, in GLenum pname, in GLfloat param);
    [StrictTypeChecking] void         texParameteri(in GLenum target, in GLenum pname, in GLint param);

    // Supported forms:
    [StrictTypeChecking] void         texImage2D(in GLenum target, in GLint level, in GLenum internalformat, in GLsizei width, in GLsizei height, 
                                                 in GLint border, in GLenum format, in GLenum type, in ArrayBufferView? pixels) raises (DOMException);
    [StrictTypeChecking] void         texImage2D(in GLenum target, in GLint level, in GLenum internalformat,
                                                 in GLenum format, in GLenum type, in ImageData? pixels) raises (DOMException);
    [StrictTypeChecking] void         texImage2D(in GLenum target, in GLint level, in GLenum internalformat,
                                                 in GLenum format, in GLenum type, in HTMLImageElement? image) raises (DOMException);
    [StrictTypeChecking] void         texImage2D(in GLenum target, in GLint level, in GLenum internalformat,
                                                 in GLenum format, in GLenum type, in HTMLCanvasElement? canvas) raises (DOMException);
#if defined(ENABLE_VIDEO) && ENABLE_VIDEO
    [StrictTypeChecking] void         texImage2D(in GLenum target, in GLint level, in GLenum internalformat,
                                                 in GLenum format, in GLenum type, in HTMLVideoElement? video) raises (DOMException);
#endif

    [StrictTypeChecking] void         texSubImage2D(in GLenum target, in GLint level, in GLint xoffset, in GLint yoffset, 
                                                    in GLsizei width, in GLsizei height, 
                                                    in GLenum format, in GLenum type, in ArrayBufferView? pixels) raises (DOMException);
    [StrictTypeChecking] void         texSubImage2D(in GLenum target, in GLint level, in GLint xoffset, in GLint yoffset,
                                                    in GLenum format, in GLenum type, in ImageData? pixels) raises (DOMException);
    [StrictTypeChecking] void         texSubImage2D(in GLenum target, in GLint level, in GLint xoffset, in GLint yoffset,
                                                    in GLenum format, in GLenum type, in HTMLImageElement? image) raises (DOMException);
    [StrictTypeChecking] void         texSubImage2D(in GLenum target, in GLint level, in GLint xoffset, in GLint yoffset,
                                                    in GLenum format, in GLenum type, in HTMLCanvasElement? canvas) raises (DOMException);
#if defined(ENABLE_VIDEO) && ENABLE_VIDEO
    [StrictTypeChecking] void         texSubImage2D(in GLenum target, in GLint level, in GLint xoffset, in GLint yoffset,
                                                    in GLenum format, in GLenum type, in HTMLVideoElement? video) raises (DOMException);
#endif

    [StrictTypeChecking] void uniform1f(in WebGLUniformLocation location, in GLfloat x) raises(DOMException);
    [StrictTypeChecking, Custom] void uniform1fv(in WebGLUniformLocation location, in Float32Array v) raises(DOMException);
    [StrictTypeChecking] void uniform1i(in WebGLUniformLocation location, in GLint x) raises(DOMException);
    [StrictTypeChecking, Custom] void uniform1iv(in WebGLUniformLocation location, in Int32Array v) raises(DOMException);
    [StrictTypeChecking] void uniform2f(in WebGLUniformLocation location, in GLfloat x, in GLfloat y) raises(DOMException);
    [StrictTypeChecking, Custom] void uniform2fv(in WebGLUniformLocation location, in Float32Array v) raises(DOMException);
    [StrictTypeChecking] void uniform2i(in WebGLUniformLocation location, in GLint x, in GLint y) raises(DOMException);
    [StrictTypeChecking, Custom] void uniform2iv(in WebGLUniformLocation location, in Int32Array v) raises(DOMException);
    [StrictTypeChecking] void uniform3f(in WebGLUniformLocation location, in GLfloat x, in GLfloat y, in GLfloat z) raises(DOMException);
    [StrictTypeChecking, Custom] void uniform3fv(in WebGLUniformLocation location, in Float32Array v) raises(DOMException);
    [StrictTypeChecking] void uniform3i(in WebGLUniformLocation location, in GLint x, in GLint y, in GLint z) raises(DOMException);
    [StrictTypeChecking, Custom] void uniform3iv(in WebGLUniformLocation location, in Int32Array v) raises(DOMException);
    [StrictTypeChecking] void uniform4f(in WebGLUniformLocation location, in GLfloat x, in GLfloat y, in GLfloat z, in GLfloat w) raises(DOMException);
    [StrictTypeChecking, Custom] void uniform4fv(in WebGLUniformLocation location, in Float32Array v) raises(DOMException);
    [StrictTypeChecking] void uniform4i(in WebGLUniformLocation location, in GLint x, in GLint y, in GLint z, in GLint w) raises(DOMException);
    [StrictTypeChecking, Custom] void uniform4iv(in WebGLUniformLocation location, in Int32Array v) raises(DOMException);

    [StrictTypeChecking, Custom] void uniformMatrix2fv(in WebGLUniformLocation location, in GLboolean transpose, in Float32Array array) raises(DOMException);
    [StrictTypeChecking, Custom] void uniformMatrix3fv(in WebGLUniformLocation location, in GLboolean transpose, in Float32Array array) raises(DOMException);
    [StrictTypeChecking, Custom] void uniformMatrix4fv(in WebGLUniformLocation location, in GLboolean transpose, in Float32Array array) raises(DOMException);

    [StrictTypeChecking] void         useProgram(in WebGLProgram program) raises(DOMException);
    [StrictTypeChecking] void         validateProgram(in WebGLProgram program) raises(DOMException);

    [StrictTypeChecking] void         vertexAttrib1f(in GLuint indx, in GLfloat x);
    [StrictTypeChecking, Custom] void vertexAttrib1fv(in GLuint indx, in Float32Array values);
    [StrictTypeChecking] void         vertexAttrib2f(in GLuint indx, in GLfloat x, in GLfloat y);
    [StrictTypeChecking, Custom] void vertexAttrib2fv(in GLuint indx, in Float32Array values);
    [StrictTypeChecking] void         vertexAttrib3f(in GLuint indx, in GLfloat x, in GLfloat y, in GLfloat z);
    [StrictTypeChecking, Custom] void vertexAttrib3fv(in GLuint indx, in Float32Array values);
    [StrictTypeChecking] void         vertexAttrib4f(in GLuint indx, in GLfloat x, in GLfloat y, in GLfloat z, in GLfloat w);
    [StrictTypeChecking, Custom] void vertexAttrib4fv(in GLuint indx, in Float32Array values);
    [StrictTypeChecking] void         vertexAttribPointer(in GLuint indx, in GLint size, in GLenum type, in GLboolean normalized, 
                                                          in GLsizei stride, in GLintptr offset) raises(DOMException);

    [StrictTypeChecking] void         viewport(in GLint x, in GLint y, in GLsizei width, in GLsizei height);
};