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webGLWorker.js
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/**
* @license
* Copyright 2014 The Emscripten Authors
* SPDX-License-Identifier: MIT
*/
// WebGLWorker worker code
function WebGLBuffer(id) {
this.what = 'buffer';
this.id = id;
}
function WebGLProgram(id) {
this.what = 'program';
this.id = id;
this.shaders = [];
this.attributes = {};
this.attributeVec = [];
this.nextAttributes = {};
this.nextAttributeVec = [];
}
function WebGLFramebuffer(id) {
this.what = 'frameBuffer';
this.id = id;
}
function WebGLRenderbuffer(id) {
this.what = 'renderBuffer';
this.id = id;
}
function WebGLTexture(id) {
this.what = 'texture';
this.id = id;
this.binding = 0;
}
function WebGLWorker() {
//===========
// Constants
//===========
/* ClearBufferMask */
this.DEPTH_BUFFER_BIT = 0x00000100;
this.STENCIL_BUFFER_BIT = 0x00000400;
this.COLOR_BUFFER_BIT = 0x00004000;
/* BeginMode */
this.POINTS = 0x0000;
this.LINES = 0x0001;
this.LINE_LOOP = 0x0002;
this.LINE_STRIP = 0x0003;
this.TRIANGLES = 0x0004;
this.TRIANGLE_STRIP = 0x0005;
this.TRIANGLE_FAN = 0x0006;
/* AlphaFunction (not supported in ES20) */
/* NEVER */
/* LESS */
/* EQUAL */
/* LEQUAL */
/* GREATER */
/* NOTEQUAL */
/* GEQUAL */
/* ALWAYS */
/* BlendingFactorDest */
this.ZERO = 0;
this.ONE = 1;
this.SRC_COLOR = 0x0300;
this.ONE_MINUS_SRC_COLOR = 0x0301;
this.SRC_ALPHA = 0x0302;
this.ONE_MINUS_SRC_ALPHA = 0x0303;
this.DST_ALPHA = 0x0304;
this.ONE_MINUS_DST_ALPHA = 0x0305;
/* BlendingFactorSrc */
/* ZERO */
/* ONE */
this.DST_COLOR = 0x0306;
this.ONE_MINUS_DST_COLOR = 0x0307;
this.SRC_ALPHA_SATURATE = 0x0308;
/* SRC_ALPHA */
/* ONE_MINUS_SRC_ALPHA */
/* DST_ALPHA */
/* ONE_MINUS_DST_ALPHA */
/* BlendEquationSeparate */
this.FUNC_ADD = 0x8006;
this.BLEND_EQUATION = 0x8009;
this.BLEND_EQUATION_RGB = 0x8009; /* same as BLEND_EQUATION */
this.BLEND_EQUATION_ALPHA = 0x883D;
/* BlendSubtract */
this.FUNC_SUBTRACT = 0x800A;
this.FUNC_REVERSE_SUBTRACT = 0x800B;
/* Separate Blend Functions */
this.BLEND_DST_RGB = 0x80C8;
this.BLEND_SRC_RGB = 0x80C9;
this.BLEND_DST_ALPHA = 0x80CA;
this.BLEND_SRC_ALPHA = 0x80CB;
this.CONSTANT_COLOR = 0x8001;
this.ONE_MINUS_CONSTANT_COLOR = 0x8002;
this.CONSTANT_ALPHA = 0x8003;
this.ONE_MINUS_CONSTANT_ALPHA = 0x8004;
this.BLEND_COLOR = 0x8005;
/* Buffer Objects */
this.ARRAY_BUFFER = 0x8892;
this.ELEMENT_ARRAY_BUFFER = 0x8893;
this.ARRAY_BUFFER_BINDING = 0x8894;
this.ELEMENT_ARRAY_BUFFER_BINDING = 0x8895;
this.STREAM_DRAW = 0x88E0;
this.STATIC_DRAW = 0x88E4;
this.DYNAMIC_DRAW = 0x88E8;
this.BUFFER_SIZE = 0x8764;
this.BUFFER_USAGE = 0x8765;
this.CURRENT_VERTEX_ATTRIB = 0x8626;
/* CullFaceMode */
this.FRONT = 0x0404;
this.BACK = 0x0405;
this.FRONT_AND_BACK = 0x0408;
/* DepthFunction */
/* NEVER */
/* LESS */
/* EQUAL */
/* LEQUAL */
/* GREATER */
/* NOTEQUAL */
/* GEQUAL */
/* ALWAYS */
/* EnableCap */
/* TEXTURE_2D */
this.CULL_FACE = 0x0B44;
this.BLEND = 0x0BE2;
this.DITHER = 0x0BD0;
this.STENCIL_TEST = 0x0B90;
this.DEPTH_TEST = 0x0B71;
this.SCISSOR_TEST = 0x0C11;
this.POLYGON_OFFSET_FILL = 0x8037;
this.SAMPLE_ALPHA_TO_COVERAGE = 0x809E;
this.SAMPLE_COVERAGE = 0x80A0;
/* ErrorCode */
this.NO_ERROR = 0;
this.INVALID_ENUM = 0x0500;
this.INVALID_VALUE = 0x0501;
this.INVALID_OPERATION = 0x0502;
this.OUT_OF_MEMORY = 0x0505;
/* FrontFaceDirection */
this.CW = 0x0900;
this.CCW = 0x0901;
/* GetPName */
this.LINE_WIDTH = 0x0B21;
this.ALIASED_POINT_SIZE_RANGE = 0x846D;
this.ALIASED_LINE_WIDTH_RANGE = 0x846E;
this.CULL_FACE_MODE = 0x0B45;
this.FRONT_FACE = 0x0B46;
this.DEPTH_RANGE = 0x0B70;
this.DEPTH_WRITEMASK = 0x0B72;
this.DEPTH_CLEAR_VALUE = 0x0B73;
this.DEPTH_FUNC = 0x0B74;
this.STENCIL_CLEAR_VALUE = 0x0B91;
this.STENCIL_FUNC = 0x0B92;
this.STENCIL_FAIL = 0x0B94;
this.STENCIL_PASS_DEPTH_FAIL = 0x0B95;
this.STENCIL_PASS_DEPTH_PASS = 0x0B96;
this.STENCIL_REF = 0x0B97;
this.STENCIL_VALUE_MASK = 0x0B93;
this.STENCIL_WRITEMASK = 0x0B98;
this.STENCIL_BACK_FUNC = 0x8800;
this.STENCIL_BACK_FAIL = 0x8801;
this.STENCIL_BACK_PASS_DEPTH_FAIL = 0x8802;
this.STENCIL_BACK_PASS_DEPTH_PASS = 0x8803;
this.STENCIL_BACK_REF = 0x8CA3;
this.STENCIL_BACK_VALUE_MASK = 0x8CA4;
this.STENCIL_BACK_WRITEMASK = 0x8CA5;
this.VIEWPORT = 0x0BA2;
this.SCISSOR_BOX = 0x0C10;
/* SCISSOR_TEST */
this.COLOR_CLEAR_VALUE = 0x0C22;
this.COLOR_WRITEMASK = 0x0C23;
this.UNPACK_ALIGNMENT = 0x0CF5;
this.PACK_ALIGNMENT = 0x0D05;
this.MAX_TEXTURE_SIZE = 0x0D33;
this.MAX_VIEWPORT_DIMS = 0x0D3A;
this.SUBPIXEL_BITS = 0x0D50;
this.RED_BITS = 0x0D52;
this.GREEN_BITS = 0x0D53;
this.BLUE_BITS = 0x0D54;
this.ALPHA_BITS = 0x0D55;
this.DEPTH_BITS = 0x0D56;
this.STENCIL_BITS = 0x0D57;
this.POLYGON_OFFSET_UNITS = 0x2A00;
/* POLYGON_OFFSET_FILL */
this.POLYGON_OFFSET_FACTOR = 0x8038;
this.TEXTURE_BINDING_2D = 0x8069;
this.SAMPLE_BUFFERS = 0x80A8;
this.SAMPLES = 0x80A9;
this.SAMPLE_COVERAGE_VALUE = 0x80AA;
this.SAMPLE_COVERAGE_INVERT = 0x80AB;
/* GetTextureParameter */
/* TEXTURE_MAG_FILTER */
/* TEXTURE_MIN_FILTER */
/* TEXTURE_WRAP_S */
/* TEXTURE_WRAP_T */
this.COMPRESSED_TEXTURE_FORMATS = 0x86A3;
/* HintMode */
this.DONT_CARE = 0x1100;
this.FASTEST = 0x1101;
this.NICEST = 0x1102;
/* HintTarget */
this.GENERATE_MIPMAP_HINT = 0x8192;
/* DataType */
this.BYTE = 0x1400;
this.UNSIGNED_BYTE = 0x1401;
this.SHORT = 0x1402;
this.UNSIGNED_SHORT = 0x1403;
this.INT = 0x1404;
this.UNSIGNED_INT = 0x1405;
this.FLOAT = 0x1406;
/* PixelFormat */
this.DEPTH_COMPONENT = 0x1902;
this.ALPHA = 0x1906;
this.RGB = 0x1907;
this.RGBA = 0x1908;
this.LUMINANCE = 0x1909;
this.LUMINANCE_ALPHA = 0x190A;
/* PixelType */
/* UNSIGNED_BYTE */
this.UNSIGNED_SHORT_4_4_4_4 = 0x8033;
this.UNSIGNED_SHORT_5_5_5_1 = 0x8034;
this.UNSIGNED_SHORT_5_6_5 = 0x8363;
/* Shaders */
this.FRAGMENT_SHADER = 0x8B30;
this.VERTEX_SHADER = 0x8B31;
this.MAX_VERTEX_ATTRIBS = 0x8869;
this.MAX_VERTEX_UNIFORM_VECTORS = 0x8DFB;
this.MAX_VARYING_VECTORS = 0x8DFC;
this.MAX_COMBINED_TEXTURE_IMAGE_UNITS = 0x8B4D;
this.MAX_VERTEX_TEXTURE_IMAGE_UNITS = 0x8B4C;
this.MAX_TEXTURE_IMAGE_UNITS = 0x8872;
this.MAX_FRAGMENT_UNIFORM_VECTORS = 0x8DFD;
this.SHADER_TYPE = 0x8B4F;
this.DELETE_STATUS = 0x8B80;
this.LINK_STATUS = 0x8B82;
this.VALIDATE_STATUS = 0x8B83;
this.ATTACHED_SHADERS = 0x8B85;
this.ACTIVE_UNIFORMS = 0x8B86;
this.ACTIVE_ATTRIBUTES = 0x8B89;
this.SHADING_LANGUAGE_VERSION = 0x8B8C;
this.CURRENT_PROGRAM = 0x8B8D;
/* StencilFunction */
this.NEVER = 0x0200;
this.LESS = 0x0201;
this.EQUAL = 0x0202;
this.LEQUAL = 0x0203;
this.GREATER = 0x0204;
this.NOTEQUAL = 0x0205;
this.GEQUAL = 0x0206;
this.ALWAYS = 0x0207;
/* StencilOp */
/* ZERO */
this.KEEP = 0x1E00;
this.REPLACE = 0x1E01;
this.INCR = 0x1E02;
this.DECR = 0x1E03;
this.INVERT = 0x150A;
this.INCR_WRAP = 0x8507;
this.DECR_WRAP = 0x8508;
/* StringName */
this.VENDOR = 0x1F00;
this.RENDERER = 0x1F01;
this.VERSION = 0x1F02;
/* TextureMagFilter */
this.NEAREST = 0x2600;
this.LINEAR = 0x2601;
/* TextureMinFilter */
/* NEAREST */
/* LINEAR */
this.NEAREST_MIPMAP_NEAREST = 0x2700;
this.LINEAR_MIPMAP_NEAREST = 0x2701;
this.NEAREST_MIPMAP_LINEAR = 0x2702;
this.LINEAR_MIPMAP_LINEAR = 0x2703;
/* TextureParameterName */
this.TEXTURE_MAG_FILTER = 0x2800;
this.TEXTURE_MIN_FILTER = 0x2801;
this.TEXTURE_WRAP_S = 0x2802;
this.TEXTURE_WRAP_T = 0x2803;
/* TextureTarget */
this.TEXTURE_2D = 0x0DE1;
this.TEXTURE = 0x1702;
this.TEXTURE_CUBE_MAP = 0x8513;
this.TEXTURE_BINDING_CUBE_MAP = 0x8514;
this.TEXTURE_CUBE_MAP_POSITIVE_X = 0x8515;
this.TEXTURE_CUBE_MAP_NEGATIVE_X = 0x8516;
this.TEXTURE_CUBE_MAP_POSITIVE_Y = 0x8517;
this.TEXTURE_CUBE_MAP_NEGATIVE_Y = 0x8518;
this.TEXTURE_CUBE_MAP_POSITIVE_Z = 0x8519;
this.TEXTURE_CUBE_MAP_NEGATIVE_Z = 0x851A;
this.MAX_CUBE_MAP_TEXTURE_SIZE = 0x851C;
/* TextureUnit */
this.TEXTURE0 = 0x84C0;
this.TEXTURE1 = 0x84C1;
this.TEXTURE2 = 0x84C2;
this.TEXTURE3 = 0x84C3;
this.TEXTURE4 = 0x84C4;
this.TEXTURE5 = 0x84C5;
this.TEXTURE6 = 0x84C6;
this.TEXTURE7 = 0x84C7;
this.TEXTURE8 = 0x84C8;
this.TEXTURE9 = 0x84C9;
this.TEXTURE10 = 0x84CA;
this.TEXTURE11 = 0x84CB;
this.TEXTURE12 = 0x84CC;
this.TEXTURE13 = 0x84CD;
this.TEXTURE14 = 0x84CE;
this.TEXTURE15 = 0x84CF;
this.TEXTURE16 = 0x84D0;
this.TEXTURE17 = 0x84D1;
this.TEXTURE18 = 0x84D2;
this.TEXTURE19 = 0x84D3;
this.TEXTURE20 = 0x84D4;
this.TEXTURE21 = 0x84D5;
this.TEXTURE22 = 0x84D6;
this.TEXTURE23 = 0x84D7;
this.TEXTURE24 = 0x84D8;
this.TEXTURE25 = 0x84D9;
this.TEXTURE26 = 0x84DA;
this.TEXTURE27 = 0x84DB;
this.TEXTURE28 = 0x84DC;
this.TEXTURE29 = 0x84DD;
this.TEXTURE30 = 0x84DE;
this.TEXTURE31 = 0x84DF;
this.ACTIVE_TEXTURE = 0x84E0;
/* TextureWrapMode */
this.REPEAT = 0x2901;
this.CLAMP_TO_EDGE = 0x812F;
this.MIRRORED_REPEAT = 0x8370;
/* Uniform Types */
this.FLOAT_VEC2 = 0x8B50;
this.FLOAT_VEC3 = 0x8B51;
this.FLOAT_VEC4 = 0x8B52;
this.INT_VEC2 = 0x8B53;
this.INT_VEC3 = 0x8B54;
this.INT_VEC4 = 0x8B55;
this.BOOL = 0x8B56;
this.BOOL_VEC2 = 0x8B57;
this.BOOL_VEC3 = 0x8B58;
this.BOOL_VEC4 = 0x8B59;
this.FLOAT_MAT2 = 0x8B5A;
this.FLOAT_MAT3 = 0x8B5B;
this.FLOAT_MAT4 = 0x8B5C;
this.SAMPLER_2D = 0x8B5E;
this.SAMPLER_3D = 0x8B5F;
this.SAMPLER_CUBE = 0x8B60;
/* Vertex Arrays */
this.VERTEX_ATTRIB_ARRAY_ENABLED = 0x8622;
this.VERTEX_ATTRIB_ARRAY_SIZE = 0x8623;
this.VERTEX_ATTRIB_ARRAY_STRIDE = 0x8624;
this.VERTEX_ATTRIB_ARRAY_TYPE = 0x8625;
this.VERTEX_ATTRIB_ARRAY_NORMALIZED = 0x886A;
this.VERTEX_ATTRIB_ARRAY_POINTER = 0x8645;
this.VERTEX_ATTRIB_ARRAY_BUFFER_BINDING = 0x889F;
/* Read Format */
this.IMPLEMENTATION_COLOR_READ_TYPE = 0x8B9A;
this.IMPLEMENTATION_COLOR_READ_FORMAT = 0x8B9B;
/* Shader Source */
this.COMPILE_STATUS = 0x8B81;
/* Shader Precision-Specified Types */
this.LOW_FLOAT = 0x8DF0;
this.MEDIUM_FLOAT = 0x8DF1;
this.HIGH_FLOAT = 0x8DF2;
this.LOW_INT = 0x8DF3;
this.MEDIUM_INT = 0x8DF4;
this.HIGH_INT = 0x8DF5;
/* Framebuffer Object. */
this.FRAMEBUFFER = 0x8D40;
this.RENDERBUFFER = 0x8D41;
this.RGBA4 = 0x8056;
this.RGB5_A1 = 0x8057;
this.RGB565 = 0x8D62;
this.DEPTH_COMPONENT16 = 0x81A5;
this.STENCIL_INDEX = 0x1901;
this.STENCIL_INDEX8 = 0x8D48;
this.DEPTH_STENCIL = 0x84F9;
this.RENDERBUFFER_WIDTH = 0x8D42;
this.RENDERBUFFER_HEIGHT = 0x8D43;
this.RENDERBUFFER_INTERNAL_FORMAT = 0x8D44;
this.RENDERBUFFER_RED_SIZE = 0x8D50;
this.RENDERBUFFER_GREEN_SIZE = 0x8D51;
this.RENDERBUFFER_BLUE_SIZE = 0x8D52;
this.RENDERBUFFER_ALPHA_SIZE = 0x8D53;
this.RENDERBUFFER_DEPTH_SIZE = 0x8D54;
this.RENDERBUFFER_STENCIL_SIZE = 0x8D55;
this.FRAMEBUFFER_ATTACHMENT_OBJECT_TYPE = 0x8CD0;
this.FRAMEBUFFER_ATTACHMENT_OBJECT_NAME = 0x8CD1;
this.FRAMEBUFFER_ATTACHMENT_TEXTURE_LEVEL = 0x8CD2;
this.FRAMEBUFFER_ATTACHMENT_TEXTURE_CUBE_MAP_FACE = 0x8CD3;
this.COLOR_ATTACHMENT0 = 0x8CE0;
this.DEPTH_ATTACHMENT = 0x8D00;
this.STENCIL_ATTACHMENT = 0x8D20;
this.DEPTH_STENCIL_ATTACHMENT = 0x821A;
this.NONE = 0;
this.FRAMEBUFFER_COMPLETE = 0x8CD5;
this.FRAMEBUFFER_INCOMPLETE_ATTACHMENT = 0x8CD6;
this.FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT = 0x8CD7;
this.FRAMEBUFFER_INCOMPLETE_DIMENSIONS = 0x8CD9;
this.FRAMEBUFFER_UNSUPPORTED = 0x8CDD;
this.ACTIVE_TEXTURE = 0x84E0;
this.FRAMEBUFFER_BINDING = 0x8CA6;
this.RENDERBUFFER_BINDING = 0x8CA7;
this.MAX_RENDERBUFFER_SIZE = 0x84E8;
this.INVALID_FRAMEBUFFER_OPERATION = 0x0506;
/* WebGL-specific enums */
this.UNPACK_FLIP_Y_WEBGL = 0x9240;
this.UNPACK_PREMULTIPLY_ALPHA_WEBGL = 0x9241;
this.CONTEXT_LOST_WEBGL = 0x9242;
this.UNPACK_COLORSPACE_CONVERSION_WEBGL = 0x9243;
this.BROWSER_DEFAULT_WEBGL = 0x9244;
//=======
// State
//=======
var commandBuffer = [];
var nextId = 1; // valid ids are > 0
var bindings = {
texture2D: null,
arrayBuffer: null,
elementArrayBuffer: null,
program: null,
framebuffer: null,
activeTexture: this.TEXTURE0,
generateMipmapHint: this.DONT_CARE,
blendSrcRGB: this.ONE,
blendSrcAlpha: this.ONE,
blendDstRGB: this.ZERO,
blendDstAlpha: this.ZERO,
blendEquationRGB: this.FUNC_ADD,
blendEquationAlpha: this.FUNC_ADD,
enabledState: {} // Stores whether various GL state via glEnable/glDisable/glIsEnabled/getParameter are enabled.
};
var stateDisabledByDefault = [this.BLEND, this.CULL_FACE, this.DEPTH_TEST, this.DITHER, this.POLYGON_OFFSET_FILL, this.SAMPLE_ALPHA_TO_COVERAGE, this.SAMPLE_COVERAGE, this.SCISSOR_TEST, this.STENCIL_TEST];
for (var i in stateDisabledByDefault) {
bindings.enabledState[stateDisabledByDefault[i]] = false; // It will be important to distinguish between false and undefined (undefined meaning the state cap enum is unknown/unsupported).
}
//==========
// Functions
//==========
var that = this;
// Helpers
this.onmessage = function(msg) {
//dump('worker GL got ' + JSON.stringify(msg) + '\n');
switch (msg.op) {
case 'setPrefetched': {
WebGLWorker.prototype.prefetchedParameters = msg.parameters;
WebGLWorker.prototype.prefetchedExtensions = msg.extensions;
WebGLWorker.prototype.prefetchedPrecisions = msg.precisions;
removeRunDependency('gl-prefetch');
break;
}
default: throw 'weird gl onmessage ' + JSON.stringify(msg);
}
};
function revname(name) {
for (var x in that) if (that[x] === name) return x;
return null;
}
// GL
this.getParameter = function(name) {
assert(name);
if (name in this.prefetchedParameters) return this.prefetchedParameters[name];
switch (name) {
case this.TEXTURE_BINDING_2D: {
return bindings.texture2D;
}
case this.ARRAY_BUFFER_BINDING: {
return bindings.arrayBuffer;
}
case this.ELEMENT_ARRAY_BUFFER_BINDING: {
return bindings.elementArrayBuffer;
}
case this.CURRENT_PROGRAM: {
return bindings.program;
}
case this.FRAMEBUFFER_BINDING: {
return bindings.framebuffer;
}
case this.ACTIVE_TEXTURE: {
return bindings.activeTexture;
}
case this.GENERATE_MIPMAP_HINT: {
return bindings.generateMipmapHint;
}
case this.BLEND_SRC_RGB: {
return bindings.blendSrcRGB;
}
case this.BLEND_SRC_ALPHA: {
return bindings.blendSrcAlpha;
}
case this.BLEND_DST_RGB: {
return bindings.blendDstRGB;
}
case this.BLEND_DST_ALPHA: {
return bindings.blendDstAlpha;
}
case this.BLEND_EQUATION_RGB: {
return bindings.blendEquationRGB;
}
case this.BLEND_EQUATION_ALPHA: {
return bindings.blendEquationAlpha;
}
default: {
if (bindings.enabledState[name] !== undefined) return bindings.enabledState[name];
throw 'TODO: get parameter ' + name + ' : ' + revname(name);
}
}
};
this.getExtension = function(name) {
var i = this.prefetchedExtensions.indexOf(name);
if (i < 0) return null;
commandBuffer.push(1, name);
switch (name) {
case 'EXT_texture_filter_anisotropic': {
return {
TEXTURE_MAX_ANISOTROPY_EXT: 0x84FE,
MAX_TEXTURE_MAX_ANISOTROPY_EXT: 0x84FF
};
}
case 'WEBGL_draw_buffers': {
return {
COLOR_ATTACHMENT0_WEBGL : 0x8CE0,
COLOR_ATTACHMENT1_WEBGL : 0x8CE1,
COLOR_ATTACHMENT2_WEBGL : 0x8CE2,
COLOR_ATTACHMENT3_WEBGL : 0x8CE3,
COLOR_ATTACHMENT4_WEBGL : 0x8CE4,
COLOR_ATTACHMENT5_WEBGL : 0x8CE5,
COLOR_ATTACHMENT6_WEBGL : 0x8CE6,
COLOR_ATTACHMENT7_WEBGL : 0x8CE7,
COLOR_ATTACHMENT8_WEBGL : 0x8CE8,
COLOR_ATTACHMENT9_WEBGL : 0x8CE9,
COLOR_ATTACHMENT10_WEBGL : 0x8CEA,
COLOR_ATTACHMENT11_WEBGL : 0x8CEB,
COLOR_ATTACHMENT12_WEBGL : 0x8CEC,
COLOR_ATTACHMENT13_WEBGL : 0x8CED,
COLOR_ATTACHMENT14_WEBGL : 0x8CEE,
COLOR_ATTACHMENT15_WEBGL : 0x8CEF,
DRAW_BUFFER0_WEBGL : 0x8825,
DRAW_BUFFER1_WEBGL : 0x8826,
DRAW_BUFFER2_WEBGL : 0x8827,
DRAW_BUFFER3_WEBGL : 0x8828,
DRAW_BUFFER4_WEBGL : 0x8829,
DRAW_BUFFER5_WEBGL : 0x882A,
DRAW_BUFFER6_WEBGL : 0x882B,
DRAW_BUFFER7_WEBGL : 0x882C,
DRAW_BUFFER8_WEBGL : 0x882D,
DRAW_BUFFER9_WEBGL : 0x882E,
DRAW_BUFFER10_WEBGL : 0x882F,
DRAW_BUFFER11_WEBGL : 0x8830,
DRAW_BUFFER12_WEBGL : 0x8831,
DRAW_BUFFER13_WEBGL : 0x8832,
DRAW_BUFFER14_WEBGL : 0x8833,
DRAW_BUFFER15_WEBGL : 0x8834,
MAX_COLOR_ATTACHMENTS_WEBGL : 0x8CDF,
MAX_DRAW_BUFFERS_WEBGL : 0x8824,
drawBuffersWEBGL: function(buffers) {
that.drawBuffersWEBGL(buffers);
}
};
}
case 'OES_standard_derivatives': {
return { FRAGMENT_SHADER_DERIVATIVE_HINT_OES: 0x8B8B };
}
};
return true; // TODO: return an object here
};
this.getSupportedExtensions = function() {
return this.prefetchedExtensions;
};
this.getShaderPrecisionFormat = function(shaderType, precisionType) {
return this.prefetchedPrecisions[shaderType][precisionType];
};
this.enable = function(cap) {
commandBuffer.push(2, cap);
bindings.enabledState[cap] = true;
};
this.isEnabled = function(cap) {
return bindings.enabledState[cap];
};
this.disable = function(cap) {
commandBuffer.push(3, cap);
bindings.enabledState[cap] = false;
};
this.clear = function(mask) {
commandBuffer.push(4, mask);
};
this.clearColor = function(r, g, b, a) {
commandBuffer.push(5, r, g, b, a);
};
this.createShader = function(type) {
var id = nextId++;
commandBuffer.push(6, type, id);
return { id: id, what: 'shader', type: type };
};
this.deleteShader = function(shader) {
if (!shader) return;
commandBuffer.push(7, shader.id);
};
this.shaderSource = function(shader, source) {
shader.source = source;
commandBuffer.push(8, shader.id, source);
};
this.compileShader = function(shader) {
commandBuffer.push(9, shader.id);
};
this.getShaderInfoLog = function(shader) {
return ''; // optimistic assumption of success; no proxying
};
this.createProgram = function() {
var id = nextId++;
commandBuffer.push(10, id);
return new WebGLProgram(id);
};
this.deleteProgram = function(program) {
if (!program) return;
commandBuffer.push(11, program.id);
};
this.attachShader = function(program, shader) {
program.shaders.push(shader);
commandBuffer.push(12, program.id, shader.id);
};
this.bindAttribLocation = function(program, index, name) {
program.nextAttributes[name] = { what: 'attribute', name: name, size: -1, location: index, type: '?' }; // fill in size, type later
program.nextAttributeVec[index] = name;
commandBuffer.push(13, program.id, index, name);
};
this.getAttribLocation = function(program, name) {
// all existing attribs are cached locally
if (name in program.attributes) return program.attributes[name].location;
return -1;
};
this.linkProgram = function(program) {
// parse shader sources
function getTypeId(text) {
switch (text) {
case 'bool': return that.BOOL;
case 'int': return that.INT;
case 'uint': return that.UNSIGNED_INT;
case 'float': return that.FLOAT;
case 'vec2': return that.FLOAT_VEC2;
case 'vec3': return that.FLOAT_VEC3;
case 'vec4': return that.FLOAT_VEC4;
case 'ivec2': return that.INT_VEC2;
case 'ivec3': return that.INT_VEC3;
case 'ivec4': return that.INT_VEC4;
case 'bvec2': return that.BOOL_VEC2;
case 'bvec3': return that.BOOL_VEC3;
case 'bvec4': return that.BOOL_VEC4;
case 'mat2': return that.FLOAT_MAT2;
case 'mat3': return that.FLOAT_MAT3;
case 'mat4': return that.FLOAT_MAT4;
case 'sampler2D': return that.SAMPLER_2D;
case 'sampler3D': return that.SAMPLER_3D;
case 'samplerCube': return that.SAMPLER_CUBE;
default: throw 'not yet recognized type text: ' + text;
}
}
function parseElementType(shader, type, obj, vec) {
var source = shader.source;
source = source.replace(/\n/g, '|\n'); // barrier between lines, to make regexing easier
var newItems = source.match(new RegExp(type + '\\s+\\w+\\s+[\\w,\\s\[\\]]+;', 'g'));
if (!newItems) return;
newItems.forEach(function(item) {
var m = new RegExp(type + '\\s+(\\w+)\\s+([\\w,\\s\[\\]]+);').exec(item);
assert(m);
m[2].split(',').map(function(name) { name = name.trim(); return name.search(/\s/) >= 0 ? '' : name }).filter(function(name) { return !!name }).forEach(function(name) {
var size = 1;
var open = name.indexOf('[');
var fullname = name;
if (open >= 0) {
var close = name.indexOf(']');
size = parseInt(name.substring(open+1, close));
name = name.substr(0, open);
fullname = name + '[0]';
}
if (!obj[name]) {
obj[name] = { what: type, name: fullname, size: size, location: -1, type: getTypeId(m[1]) };
if (vec) vec.push(name);
}
});
});
}
program.uniforms = {};
program.uniformVec = [];
program.attributes = program.nextAttributes;
program.attributeVec = program.nextAttributeVec;
program.nextAttributes = {};
program.nextAttributeVec = [];
var existingAttributes = {};
program.shaders.forEach(function(shader) {
parseElementType(shader, 'uniform', program.uniforms, program.uniformVec);
parseElementType(shader, 'attribute', existingAttributes, null);
});
// bind not-yet bound attributes
for (var attr in existingAttributes) {
if (!(attr in program.attributes)) {
var index = program.attributeVec.length;
program.attributes[attr] = { what: 'attribute', name: attr, size: -1, location: index, type: '?' }; // fill in size, type later
program.attributeVec[index] = attr;
commandBuffer.push(13, program.id, index, attr); // do a bindAttribLocation as well, so this takes effect in the link we are about to do
}
program.attributes[attr].size = existingAttributes[attr].size;
program.attributes[attr].type = existingAttributes[attr].type;
}
commandBuffer.push(14, program.id);
};
this.getProgramParameter = function(program, name) {
switch (name) {
case this.ACTIVE_UNIFORMS: return program.uniformVec.length;
case this.ACTIVE_ATTRIBUTES: return program.attributeVec.length;
case this.LINK_STATUS: {
// optimisticaly return success; client will abort on an actual error. we assume an error-free async workflow
commandBuffer.push(15, program.id, name);
return true;
}
default: throw 'bad getProgramParameter ' + revname(name);
}
};
this.getActiveAttrib = function(program, index) {
var name = program.attributeVec[index];
if (!name) return null;
return program.attributes[name];
};
this.getActiveUniform = function(program, index) {
var name = program.uniformVec[index];
if (!name) return null;
return program.uniforms[name];
};
this.getUniformLocation = function(program, name) {
var fullname = name;
var index = -1;
var open = name.indexOf('[');
if (open >= 0) {
var close = name.indexOf(']');
index = parseInt(name.substring(open+1, close));
name = name.substr(0, open);
}
if (!(name in program.uniforms)) return null;
var id = nextId++;
commandBuffer.push(16, program.id, fullname, id);
return { what: 'location', uniform: program.uniforms[name], id: id, index: index };
};
this.getProgramInfoLog = function(shader) {
return ''; // optimistic assumption of success; no proxying
};
this.useProgram = function(program) {
commandBuffer.push(17, program ? program.id : 0);
bindings.program = program;
};
this.uniform1i = function(location, data) {
if (!location) return;
commandBuffer.push(18, location.id, data);
};
this.uniform1f = function(location, data) {
if (!location) return;
commandBuffer.push(19, location.id, data);
};
this.uniform3fv = function(location, data) {
if (!location) return;
commandBuffer.push(20, location.id, new Float32Array(data));
};
this.uniform4f = function(location, x, y, z, w) {
if (!location) return;
commandBuffer.push(21, location.id, new Float32Array([x, y, z, w]));
};
this.uniform4fv = function(location, data) {
if (!location) return;
commandBuffer.push(21, location.id, new Float32Array(data));
};
this.uniformMatrix4fv = function(location, transpose, data) {
if (!location) return;
commandBuffer.push(22, location.id, transpose, new Float32Array(data));
};
this.vertexAttrib4fv = function(index, values) {
commandBuffer.push(23, index, new Float32Array(values));
};
this.createBuffer = function() {
var id = nextId++;
commandBuffer.push(24, id);
return new WebGLBuffer(id);
};
this.deleteBuffer = function(buffer) {
if (!buffer) return;
commandBuffer.push(25, buffer.id);
};
this.bindBuffer = function(target, buffer) {
commandBuffer.push(26, target, buffer ? buffer.id : 0);
switch (target) {
case this.ARRAY_BUFFER_BINDING: {
bindings.arrayBuffer = buffer;
break;
}
case this.ELEMENT_ARRAY_BUFFER_BINDING: {
bindings.elementArrayBuffer = buffer;
break;
}
}
};
function duplicate(something) {
// clone data properly: handles numbers, null, typed arrays, js arrays and array buffers
if (!something || typeof something == 'number') return something;
if (something.slice) return something.slice(0); // ArrayBuffer or js array
return new something.constructor(something); // typed array
}
this.bufferData = function(target, something, usage) {
commandBuffer.push(27, target, duplicate(something), usage);
};
this.bufferSubData = function(target, offset, something) {
commandBuffer.push(28, target, offset, duplicate(something));
};
this.viewport = function(x, y, w, h) {
commandBuffer.push(29, x, y, w, h);
};
this.vertexAttribPointer = function(index, size, type, normalized, stride, offset) {
commandBuffer.push(30, index, size, type, normalized, stride, offset);
};
this.enableVertexAttribArray = function(index) {
commandBuffer.push(31, index);
};
this.disableVertexAttribArray = function(index) {
commandBuffer.push(32, index);
};
this.drawArrays = function(mode, first, count) {
commandBuffer.push(33, mode, first, count);
};
this.drawElements = function(mode, count, type, offset) {
commandBuffer.push(34, mode, count, type, offset);
};
this.getError = function() {
// optimisticaly return success; client will abort on an actual error. we assume an error-free async workflow
commandBuffer.push(35);
return this.NO_ERROR;
};
this.createTexture = function() {
var id = nextId++;
commandBuffer.push(36, id);
return new WebGLTexture(id);
};
this.deleteTexture = function(texture) {
if (!texture) return;
commandBuffer.push(37, texture.id);
texture.id = 0;
};
this.isTexture = function(texture) {
return texture && texture.what === 'texture' && texture.id > 0 && texture.binding;
};
this.bindTexture = function(target, texture) {
switch (target) {
case that.TEXTURE_2D: {
bindings.texture2D = texture;
break;
}
}
if (texture) texture.binding = target;
commandBuffer.push(38, target, texture ? texture.id : 0);
};
this.texParameteri = function(target, pname, param) {
commandBuffer.push(39, target, pname, param);
};
this.texImage2D = function(target, level, internalformat, width, height, border, format, type, pixels) {
if (pixels === undefined) {
format = width; // width, height, border do not exist in the shorter overload
type = height;
pixels = border;
assert(pixels instanceof Image);
assert(internalformat === format && format === this.RGBA); // HTML Images are RGBA, 8-bit
assert(type === this.UNSIGNED_BYTE);
var data = pixels.data;
width = data.width;
height = data.height;
border = 0;
pixels = new Uint8Array(data.data); // XXX transform from clamped to normal, could have been done in duplicate
}
commandBuffer.push(40, target, level, internalformat, width, height, border, format, type, duplicate(pixels));
};
this.compressedTexImage2D = function(target, level, internalformat, width, height, border, pixels) {
commandBuffer.push(41, target, level, internalformat, width, height, border, duplicate(pixels));
};
this.activeTexture = function(texture) {
commandBuffer.push(42, texture);
bindings.activeTexture = texture;
};
this.getShaderParameter = function(shader, pname) {
switch (pname) {
case this.SHADER_TYPE: return shader.type;
case this.COMPILE_STATUS: {
// optimisticaly return success; client will abort on an actual error. we assume an error-free async workflow
commandBuffer.push(43, shader.id, pname);
return true;
}
default: throw 'unsupported getShaderParameter ' + pname;
}
};
this.clearDepth = function(depth) {
commandBuffer.push(44, depth);
};
this.depthFunc = function(depth) {
commandBuffer.push(45, depth);
};
this.frontFace = function(depth) {
commandBuffer.push(46, depth);
};
this.cullFace = function(depth) {
commandBuffer.push(47, depth);
};
this.readPixels = function(depth) {
abort('readPixels is impossible, we are async GL');
};
this.pixelStorei = function(pname, param) {
commandBuffer.push(48, pname, param);
};
this.depthMask = function(flag) {
commandBuffer.push(49, flag);
};
this.depthRange = function(near, far) {
commandBuffer.push(50, near, far);
};
this.blendFunc = function(sfactor, dfactor) {
commandBuffer.push(51, sfactor, dfactor);
bindings.blendSrcRGB = bindings.blendSrcAlpha = sfactor;
bindings.blendDstRGB = bindings.blendDstAlpha = dfactor;
};
this.scissor = function(x, y, width, height) {
commandBuffer.push(52, x, y, width, height);
};
this.colorMask = function(red, green, blue, alpha) {
commandBuffer.push(53, red, green, blue, alpha);
};
this.lineWidth = function(width) {
commandBuffer.push(54, width);
};