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gl.js
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// load wasm module and link with gl functions
//
// this file was made by tons of hacks from emscripten's parseTools and library_webgl
// https://github.com/emscripten-core/emscripten/blob/master/src/parseTools.js
// https://github.com/emscripten-core/emscripten/blob/master/src/library_webgl.js
//
// TODO: split to gl.js and loader.js
"use strict";
const version = 2;
const canvas = document.querySelector("#glcanvas");
var gl;
var clipboard = null;
var plugins = [];
var wasm_memory;
var animation_frame_timeout;
var high_dpi = false;
// if true, requestAnimationFrame will only be called from "schedule_update"
// if false, requestAnimationFrame will be called at the end of each frame
var blocking_event_loop = false;
function init_webgl(version) {
if (version == 1) {
gl = canvas.getContext("webgl");
function acquireVertexArrayObjectExtension(ctx) {
// Extension available in WebGL 1 from Firefox 25 and WebKit 536.28/desktop Safari 6.0.3 onwards. Core feature in WebGL 2.
var ext = ctx.getExtension('OES_vertex_array_object');
if (ext) {
ctx['createVertexArray'] = function () { return ext['createVertexArrayOES'](); };
ctx['deleteVertexArray'] = function (vao) { ext['deleteVertexArrayOES'](vao); };
ctx['bindVertexArray'] = function (vao) { ext['bindVertexArrayOES'](vao); };
ctx['isVertexArray'] = function (vao) { return ext['isVertexArrayOES'](vao); };
}
else {
alert("Unable to get OES_vertex_array_object extension");
}
}
function acquireInstancedArraysExtension(ctx) {
// Extension available in WebGL 1 from Firefox 26 and Google Chrome 30 onwards. Core feature in WebGL 2.
var ext = ctx.getExtension('ANGLE_instanced_arrays');
if (ext) {
ctx['vertexAttribDivisor'] = function (index, divisor) { ext['vertexAttribDivisorANGLE'](index, divisor); };
ctx['drawArraysInstanced'] = function (mode, first, count, primcount) { ext['drawArraysInstancedANGLE'](mode, first, count, primcount); };
ctx['drawElementsInstanced'] = function (mode, count, type, indices, primcount) { ext['drawElementsInstancedANGLE'](mode, count, type, indices, primcount); };
}
}
function acquireDisjointTimerQueryExtension(ctx) {
var ext = ctx.getExtension('EXT_disjoint_timer_query');
if (ext) {
ctx['createQuery'] = function () { return ext['createQueryEXT'](); };
ctx['beginQuery'] = function (target, query) { return ext['beginQueryEXT'](target, query); };
ctx['endQuery'] = function (target) { return ext['endQueryEXT'](target); };
ctx['deleteQuery'] = function (query) { ext['deleteQueryEXT'](query); };
ctx['getQueryObject'] = function (query, pname) { return ext['getQueryObjectEXT'](query, pname); };
}
}
function acquireDrawBuffers(ctx) {
var ext = ctx.getExtension('WEBGL_draw_buffers');
if (ext) {
ctx['drawBuffers'] = function (bufs) { return ext['drawBuffersWEBGL'](bufs); };
}
}
try {
gl.getExtension("EXT_shader_texture_lod");
gl.getExtension("OES_standard_derivatives");
} catch (e) {
console.warn(e);
}
acquireVertexArrayObjectExtension(gl);
acquireInstancedArraysExtension(gl);
acquireDisjointTimerQueryExtension(gl);
acquireDrawBuffers(gl);
// https://developer.mozilla.org/en-US/docs/Web/API/WEBGL_depth_texture
if (gl.getExtension('WEBGL_depth_texture') == null) {
alert("Cant initialize WEBGL_depth_texture extension");
}
} else {
gl = canvas.getContext("webgl2");
}
if (gl === null) {
alert("Unable to initialize WebGL. Your browser or machine may not support it.");
}
}
canvas.focus();
canvas.requestPointerLock = canvas.requestPointerLock ||
canvas.mozRequestPointerLock ||
// pointer lock in any form is not supported on iOS safari
// https://developer.mozilla.org/en-US/docs/Web/API/Pointer_Lock_API#browser_compatibility
(function () { });
document.exitPointerLock = document.exitPointerLock ||
document.mozExitPointerLock ||
// pointer lock in any form is not supported on iOS safari
(function () { });
function assert(flag, message) {
if (flag == false) {
alert(message)
}
}
function getArray(ptr, arr, n) {
return new arr(wasm_memory.buffer, ptr, n);
}
function UTF8ToString(ptr, maxBytesToRead) {
let u8Array = new Uint8Array(wasm_memory.buffer, ptr);
var idx = 0;
var endIdx = idx + maxBytesToRead;
var str = '';
while (!(idx >= endIdx)) {
// For UTF8 byte structure, see:
// http://en.wikipedia.org/wiki/UTF-8#Description
// https://www.ietf.org/rfc/rfc2279.txt
// https://tools.ietf.org/html/rfc3629
var u0 = u8Array[idx++];
// If not building with TextDecoder enabled, we don't know the string length, so scan for \0 byte.
// If building with TextDecoder, we know exactly at what byte index the string ends, so checking for nulls here would be redundant.
if (!u0) return str;
if (!(u0 & 0x80)) { str += String.fromCharCode(u0); continue; }
var u1 = u8Array[idx++] & 63;
if ((u0 & 0xE0) == 0xC0) { str += String.fromCharCode(((u0 & 31) << 6) | u1); continue; }
var u2 = u8Array[idx++] & 63;
if ((u0 & 0xF0) == 0xE0) {
u0 = ((u0 & 15) << 12) | (u1 << 6) | u2;
} else {
if ((u0 & 0xF8) != 0xF0) console.warn('Invalid UTF-8 leading byte 0x' + u0.toString(16) + ' encountered when deserializing a UTF-8 string on the asm.js/wasm heap to a JS string!');
u0 = ((u0 & 7) << 18) | (u1 << 12) | (u2 << 6) | (u8Array[idx++] & 63);
}
if (u0 < 0x10000) {
str += String.fromCharCode(u0);
} else {
var ch = u0 - 0x10000;
str += String.fromCharCode(0xD800 | (ch >> 10), 0xDC00 | (ch & 0x3FF));
}
}
return str;
}
function stringToUTF8(str, heap, outIdx, maxBytesToWrite) {
var startIdx = outIdx;
var endIdx = outIdx + maxBytesToWrite;
for (var i = 0; i < str.length; ++i) {
// Gotcha: charCodeAt returns a 16-bit word that is a UTF-16 encoded code unit, not a Unicode code point of the character! So decode UTF16->UTF32->UTF8.
// See http://unicode.org/faq/utf_bom.html#utf16-3
// For UTF8 byte structure, see http://en.wikipedia.org/wiki/UTF-8#Description and https://www.ietf.org/rfc/rfc2279.txt and https://tools.ietf.org/html/rfc3629
var u = str.charCodeAt(i); // possibly a lead surrogate
if (u >= 0xD800 && u <= 0xDFFF) {
var u1 = str.charCodeAt(++i);
u = 0x10000 + ((u & 0x3FF) << 10) | (u1 & 0x3FF);
}
if (u <= 0x7F) {
if (outIdx >= endIdx) break;
heap[outIdx++] = u;
} else if (u <= 0x7FF) {
if (outIdx + 1 >= endIdx) break;
heap[outIdx++] = 0xC0 | (u >> 6);
heap[outIdx++] = 0x80 | (u & 63);
} else if (u <= 0xFFFF) {
if (outIdx + 2 >= endIdx) break;
heap[outIdx++] = 0xE0 | (u >> 12);
heap[outIdx++] = 0x80 | ((u >> 6) & 63);
heap[outIdx++] = 0x80 | (u & 63);
} else {
if (outIdx + 3 >= endIdx) break;
if (u >= 0x200000) console.warn('Invalid Unicode code point 0x' + u.toString(16) + ' encountered when serializing a JS string to an UTF-8 string on the asm.js/wasm heap! (Valid unicode code points should be in range 0-0x1FFFFF).');
heap[outIdx++] = 0xF0 | (u >> 18);
heap[outIdx++] = 0x80 | ((u >> 12) & 63);
heap[outIdx++] = 0x80 | ((u >> 6) & 63);
heap[outIdx++] = 0x80 | (u & 63);
}
}
return outIdx - startIdx;
}
var FS = {
loaded_files: [],
unique_id: 0
};
var GL = {
counter: 1,
buffers: [],
mappedBuffers: {},
programs: [],
framebuffers: [],
renderbuffers: [],
textures: [],
uniforms: [],
shaders: [],
vaos: [],
timerQueries: [],
contexts: {},
programInfos: {},
getNewId: function (table) {
var ret = GL.counter++;
for (var i = table.length; i < ret; i++) {
table[i] = null;
}
return ret;
},
validateGLObjectID: function (objectHandleArray, objectID, callerFunctionName, objectReadableType) {
if (objectID != 0) {
if (objectHandleArray[objectID] === null) {
console.error(callerFunctionName + ' called with an already deleted ' + objectReadableType + ' ID ' + objectID + '!');
} else if (!objectHandleArray[objectID]) {
console.error(callerFunctionName + ' called with an invalid ' + objectReadableType + ' ID ' + objectID + '!');
}
}
},
getSource: function (shader, count, string, length) {
var source = '';
for (var i = 0; i < count; ++i) {
var len = length == 0 ? undefined : getArray(length + i * 4, Uint32Array, 1)[0];
source += UTF8ToString(getArray(string + i * 4, Uint32Array, 1)[0], len);
}
return source;
},
populateUniformTable: function (program) {
GL.validateGLObjectID(GL.programs, program, 'populateUniformTable', 'program');
var p = GL.programs[program];
var ptable = GL.programInfos[program] = {
uniforms: {},
maxUniformLength: 0, // This is eagerly computed below, since we already enumerate all uniforms anyway.
maxAttributeLength: -1, // This is lazily computed and cached, computed when/if first asked, "-1" meaning not computed yet.
maxUniformBlockNameLength: -1 // Lazily computed as well
};
var utable = ptable.uniforms;
// A program's uniform table maps the string name of an uniform to an integer location of that uniform.
// The global GL.uniforms map maps integer locations to WebGLUniformLocations.
var numUniforms = gl.getProgramParameter(p, 0x8B86/*GL_ACTIVE_UNIFORMS*/);
for (var i = 0; i < numUniforms; ++i) {
var u = gl.getActiveUniform(p, i);
var name = u.name;
ptable.maxUniformLength = Math.max(ptable.maxUniformLength, name.length + 1);
// If we are dealing with an array, e.g. vec4 foo[3], strip off the array index part to canonicalize that "foo", "foo[]",
// and "foo[0]" will mean the same. Loop below will populate foo[1] and foo[2].
if (name.slice(-1) == ']') {
name = name.slice(0, name.lastIndexOf('['));
}
// Optimize memory usage slightly: If we have an array of uniforms, e.g. 'vec3 colors[3];', then
// only store the string 'colors' in utable, and 'colors[0]', 'colors[1]' and 'colors[2]' will be parsed as 'colors'+i.
// Note that for the GL.uniforms table, we still need to fetch the all WebGLUniformLocations for all the indices.
var loc = gl.getUniformLocation(p, name);
if (loc) {
var id = GL.getNewId(GL.uniforms);
utable[name] = [u.size, id];
GL.uniforms[id] = loc;
for (var j = 1; j < u.size; ++j) {
var n = name + '[' + j + ']';
loc = gl.getUniformLocation(p, n);
id = GL.getNewId(GL.uniforms);
GL.uniforms[id] = loc;
}
}
}
}
}
function _glGenObject(n, buffers, createFunction, objectTable, functionName) {
for (var i = 0; i < n; i++) {
var buffer = gl[createFunction]();
var id = buffer && GL.getNewId(objectTable);
if (buffer) {
buffer.name = id;
objectTable[id] = buffer;
} else {
console.error("GL_INVALID_OPERATION");
GL.recordError(0x0502 /* GL_INVALID_OPERATION */);
alert('GL_INVALID_OPERATION in ' + functionName + ': GLctx.' + createFunction + ' returned null - most likely GL context is lost!');
}
getArray(buffers + i * 4, Int32Array, 1)[0] = id;
}
}
function _webglGet(name_, p, type) {
// Guard against user passing a null pointer.
// Note that GLES2 spec does not say anything about how passing a null pointer should be treated.
// Testing on desktop core GL 3, the application crashes on glGetIntegerv to a null pointer, but
// better to report an error instead of doing anything random.
if (!p) {
console.error('GL_INVALID_VALUE in glGet' + type + 'v(name=' + name_ + ': Function called with null out pointer!');
GL.recordError(0x501 /* GL_INVALID_VALUE */);
return;
}
var ret = undefined;
switch (name_) { // Handle a few trivial GLES values
case 0x8DFA: // GL_SHADER_COMPILER
ret = 1;
break;
case 0x8DF8: // GL_SHADER_BINARY_FORMATS
if (type != 'EM_FUNC_SIG_PARAM_I' && type != 'EM_FUNC_SIG_PARAM_I64') {
GL.recordError(0x500); // GL_INVALID_ENUM
err('GL_INVALID_ENUM in glGet' + type + 'v(GL_SHADER_BINARY_FORMATS): Invalid parameter type!');
}
return; // Do not write anything to the out pointer, since no binary formats are supported.
case 0x87FE: // GL_NUM_PROGRAM_BINARY_FORMATS
case 0x8DF9: // GL_NUM_SHADER_BINARY_FORMATS
ret = 0;
break;
case 0x86A2: // GL_NUM_COMPRESSED_TEXTURE_FORMATS
// WebGL doesn't have GL_NUM_COMPRESSED_TEXTURE_FORMATS (it's obsolete since GL_COMPRESSED_TEXTURE_FORMATS returns a JS array that can be queried for length),
// so implement it ourselves to allow C++ GLES2 code get the length.
var formats = gl.getParameter(0x86A3 /*GL_COMPRESSED_TEXTURE_FORMATS*/);
ret = formats ? formats.length : 0;
break;
case 0x821D: // GL_NUM_EXTENSIONS
assert(false, "unimplemented");
break;
case 0x821B: // GL_MAJOR_VERSION
case 0x821C: // GL_MINOR_VERSION
assert(false, "unimplemented");
break;
}
if (ret === undefined) {
var result = gl.getParameter(name_);
switch (typeof (result)) {
case "number":
ret = result;
break;
case "boolean":
ret = result ? 1 : 0;
break;
case "string":
GL.recordError(0x500); // GL_INVALID_ENUM
console.error('GL_INVALID_ENUM in glGet' + type + 'v(' + name_ + ') on a name which returns a string!');
return;
case "object":
if (result === null) {
// null is a valid result for some (e.g., which buffer is bound - perhaps nothing is bound), but otherwise
// can mean an invalid name_, which we need to report as an error
switch (name_) {
case 0x8894: // ARRAY_BUFFER_BINDING
case 0x8B8D: // CURRENT_PROGRAM
case 0x8895: // ELEMENT_ARRAY_BUFFER_BINDING
case 0x8CA6: // FRAMEBUFFER_BINDING
case 0x8CA7: // RENDERBUFFER_BINDING
case 0x8069: // TEXTURE_BINDING_2D
case 0x85B5: // WebGL 2 GL_VERTEX_ARRAY_BINDING, or WebGL 1 extension OES_vertex_array_object GL_VERTEX_ARRAY_BINDING_OES
case 0x8919: // GL_SAMPLER_BINDING
case 0x8E25: // GL_TRANSFORM_FEEDBACK_BINDING
case 0x8514: { // TEXTURE_BINDING_CUBE_MAP
ret = 0;
break;
}
default: {
GL.recordError(0x500); // GL_INVALID_ENUM
console.error('GL_INVALID_ENUM in glGet' + type + 'v(' + name_ + ') and it returns null!');
return;
}
}
} else if (result instanceof Float32Array ||
result instanceof Uint32Array ||
result instanceof Int32Array ||
result instanceof Array) {
for (var i = 0; i < result.length; ++i) {
assert(false, "unimplemented")
}
return;
} else {
try {
ret = result.name | 0;
} catch (e) {
GL.recordError(0x500); // GL_INVALID_ENUM
console.error('GL_INVALID_ENUM in glGet' + type + 'v: Unknown object returned from WebGL getParameter(' + name_ + ')! (error: ' + e + ')');
return;
}
}
break;
default:
GL.recordError(0x500); // GL_INVALID_ENUM
console.error('GL_INVALID_ENUM in glGet' + type + 'v: Native code calling glGet' + type + 'v(' + name_ + ') and it returns ' + result + ' of type ' + typeof (result) + '!');
return;
}
}
switch (type) {
case 'EM_FUNC_SIG_PARAM_I64': getArray(p, Int32Array, 1)[0] = ret;
case 'EM_FUNC_SIG_PARAM_I': getArray(p, Int32Array, 1)[0] = ret; break;
case 'EM_FUNC_SIG_PARAM_F': getArray(p, Float32Array, 1)[0] = ret; break;
case 'EM_FUNC_SIG_PARAM_B': getArray(p, Int8Array, 1)[0] = ret ? 1 : 0; break;
default: throw 'internal glGet error, bad type: ' + type;
}
}
var Module;
var wasm_exports;
function resize(canvas, on_resize) {
var dpr = dpi_scale();
var displayWidth = canvas.clientWidth * dpr;
var displayHeight = canvas.clientHeight * dpr;
if (canvas.width != displayWidth ||
canvas.height != displayHeight) {
canvas.width = displayWidth;
canvas.height = displayHeight;
if (on_resize != undefined)
on_resize(Math.floor(displayWidth), Math.floor(displayHeight))
}
}
function animation() {
wasm_exports.frame();
if (!window.blocking_event_loop) {
if (animation_frame_timeout) {
window.cancelAnimationFrame(animation_frame_timeout);
}
animation_frame_timeout = window.requestAnimationFrame(animation);
}
}
const SAPP_EVENTTYPE_TOUCHES_BEGAN = 10;
const SAPP_EVENTTYPE_TOUCHES_MOVED = 11;
const SAPP_EVENTTYPE_TOUCHES_ENDED = 12;
const SAPP_EVENTTYPE_TOUCHES_CANCELED = 13;
const SAPP_MODIFIER_SHIFT = 1;
const SAPP_MODIFIER_CTRL = 2;
const SAPP_MODIFIER_ALT = 4;
const SAPP_MODIFIER_SUPER = 8;
function into_sapp_mousebutton(btn) {
switch (btn) {
case 0: return 0;
case 1: return 2;
case 2: return 1;
default: return btn;
}
}
function into_sapp_keycode(key_code) {
switch (key_code) {
case "Space": return 32;
case "Quote": return 222;
case "Comma": return 44;
case "Minus": return 45;
case "Period": return 46;
case "Slash": return 189;
case "Digit0": return 48;
case "Digit1": return 49;
case "Digit2": return 50;
case "Digit3": return 51;
case "Digit4": return 52;
case "Digit5": return 53;
case "Digit6": return 54;
case "Digit7": return 55;
case "Digit8": return 56;
case "Digit9": return 57;
case "Semicolon": return 59;
case "Equal": return 61;
case "KeyA": return 65;
case "KeyB": return 66;
case "KeyC": return 67;
case "KeyD": return 68;
case "KeyE": return 69;
case "KeyF": return 70;
case "KeyG": return 71;
case "KeyH": return 72;
case "KeyI": return 73;
case "KeyJ": return 74;
case "KeyK": return 75;
case "KeyL": return 76;
case "KeyM": return 77;
case "KeyN": return 78;
case "KeyO": return 79;
case "KeyP": return 80;
case "KeyQ": return 81;
case "KeyR": return 82;
case "KeyS": return 83;
case "KeyT": return 84;
case "KeyU": return 85;
case "KeyV": return 86;
case "KeyW": return 87;
case "KeyX": return 88;
case "KeyY": return 89;
case "KeyZ": return 90;
case "BracketLeft": return 91;
case "Backslash": return 92;
case "BracketRight": return 93;
case "Backquote": return 96;
case "Escape": return 256;
case "Enter": return 257;
case "Tab": return 258;
case "Backspace": return 259;
case "Insert": return 260;
case "Delete": return 261;
case "ArrowRight": return 262;
case "ArrowLeft": return 263;
case "ArrowDown": return 264;
case "ArrowUp": return 265;
case "PageUp": return 266;
case "PageDown": return 267;
case "Home": return 268;
case "End": return 269;
case "CapsLock": return 280;
case "ScrollLock": return 281;
case "NumLock": return 282;
case "PrintScreen": return 283;
case "Pause": return 284;
case "F1": return 290;
case "F2": return 291;
case "F3": return 292;
case "F4": return 293;
case "F5": return 294;
case "F6": return 295;
case "F7": return 296;
case "F8": return 297;
case "F9": return 298;
case "F10": return 299;
case "F11": return 300;
case "F12": return 301;
case "F13": return 302;
case "F14": return 303;
case "F15": return 304;
case "F16": return 305;
case "F17": return 306;
case "F18": return 307;
case "F19": return 308;
case "F20": return 309;
case "F21": return 310;
case "F22": return 311;
case "F23": return 312;
case "F24": return 313;
case "Numpad0": return 320;
case "Numpad1": return 321;
case "Numpad2": return 322;
case "Numpad3": return 323;
case "Numpad4": return 324;
case "Numpad5": return 325;
case "Numpad6": return 326;
case "Numpad7": return 327;
case "Numpad8": return 328;
case "Numpad9": return 329;
case "NumpadDecimal": return 330;
case "NumpadDivide": return 331;
case "NumpadMultiply": return 332;
case "NumpadSubtract": return 333;
case "NumpadAdd": return 334;
case "NumpadEnter": return 335;
case "NumpadEqual": return 336;
case "ShiftLeft": return 340;
case "ControlLeft": return 341;
case "AltLeft": return 342;
case "OSLeft": return 343;
case "ShiftRight": return 344;
case "ControlRight": return 345;
case "AltRight": return 346;
case "OSRight": return 347;
case "ContextMenu": return 348;
}
console.log("Unsupported keyboard key: ", key_code)
}
function dpi_scale() {
if (high_dpi) {
return window.devicePixelRatio || 1.0;
} else {
return 1.0;
}
}
function texture_size(internalFormat, width, height) {
if (internalFormat == gl.ALPHA) {
return width * height;
}
else if (internalFormat == gl.RGB) {
return width * height * 3;
} else if (internalFormat == gl.RGBA) {
return width * height * 4;
} else { // TextureFormat::RGB565 | TextureFormat::RGBA4 | TextureFormat::RGBA5551
return width * height * 3;
}
}
function mouse_relative_position(clientX, clientY) {
var targetRect = canvas.getBoundingClientRect();
var x = (clientX - targetRect.left) * dpi_scale();
var y = (clientY - targetRect.top) * dpi_scale();
return { x, y };
}
var emscripten_shaders_hack = false;
var importObject = {
env: {
console_debug: function (ptr) {
console.debug(UTF8ToString(ptr));
},
console_log: function (ptr) {
console.log(UTF8ToString(ptr));
},
console_info: function (ptr) {
console.info(UTF8ToString(ptr));
},
console_warn: function (ptr) {
console.warn(UTF8ToString(ptr));
},
console_error: function (ptr) {
console.error(UTF8ToString(ptr));
},
set_emscripten_shader_hack: function (flag) {
emscripten_shaders_hack = flag;
},
sapp_set_clipboard: function (ptr, len) {
clipboard = UTF8ToString(ptr, len);
},
dpi_scale,
rand: function () {
return Math.floor(Math.random() * 2147483647);
},
now: function () {
return Date.now() / 1000.0;
},
canvas_width: function () {
return Math.floor(canvas.width);
},
canvas_height: function () {
return Math.floor(canvas.height);
},
glClearDepthf: function (depth) {
gl.clearDepth(depth);
},
glClearColor: function (r, g, b, a) {
gl.clearColor(r, g, b, a);
},
glClearStencil: function (s) {
gl.clearStencil(s);
},
glColorMask: function (red, green, blue, alpha) {
gl.colorMask(red, green, blue, alpha);
},
glScissor: function (x, y, w, h) {
gl.scissor(x, y, w, h);
},
glClear: function (mask) {
gl.clear(mask);
},
glGenTextures: function (n, textures) {
_glGenObject(n, textures, "createTexture", GL.textures, "glGenTextures")
},
glActiveTexture: function (texture) {
gl.activeTexture(texture)
},
glBindTexture: function (target, texture) {
GL.validateGLObjectID(GL.textures, texture, 'glBindTexture', 'texture');
gl.bindTexture(target, GL.textures[texture]);
},
glTexImage2D: function (target, level, internalFormat, width, height, border, format, type, pixels) {
gl.texImage2D(target, level, internalFormat, width, height, border, format, type,
pixels ? getArray(pixels, Uint8Array, texture_size(internalFormat, width, height)) : null);
},
glTexSubImage2D: function (target, level, xoffset, yoffset, width, height, format, type, pixels) {
gl.texSubImage2D(target, level, xoffset, yoffset, width, height, format, type,
pixels ? getArray(pixels, Uint8Array, texture_size(format, width, height)) : null);
},
glReadPixels: function (x, y, width, height, format, type, pixels) {
var pixelData = getArray(pixels, Uint8Array, texture_size(format, width, height));
gl.readPixels(x, y, width, height, format, type, pixelData);
},
glTexParameteri: function (target, pname, param) {
gl.texParameteri(target, pname, param);
},
glUniform1fv: function (location, count, value) {
GL.validateGLObjectID(GL.uniforms, location, 'glUniform1fv', 'location');
assert((value & 3) == 0, 'Pointer to float data passed to glUniform1fv must be aligned to four bytes!');
var view = getArray(value, Float32Array, 1 * count);
gl.uniform1fv(GL.uniforms[location], view);
},
glUniform2fv: function (location, count, value) {
GL.validateGLObjectID(GL.uniforms, location, 'glUniform2fv', 'location');
assert((value & 3) == 0, 'Pointer to float data passed to glUniform2fv must be aligned to four bytes!');
var view = getArray(value, Float32Array, 2 * count);
gl.uniform2fv(GL.uniforms[location], view);
},
glUniform3fv: function (location, count, value) {
GL.validateGLObjectID(GL.uniforms, location, 'glUniform3fv', 'location');
assert((value & 3) == 0, 'Pointer to float data passed to glUniform3fv must be aligned to four bytes!');
var view = getArray(value, Float32Array, 3 * count);
gl.uniform3fv(GL.uniforms[location], view);
},
glUniform4fv: function (location, count, value) {
GL.validateGLObjectID(GL.uniforms, location, 'glUniform4fv', 'location');
assert((value & 3) == 0, 'Pointer to float data passed to glUniform4fv must be aligned to four bytes!');
var view = getArray(value, Float32Array, 4 * count);
gl.uniform4fv(GL.uniforms[location], view);
},
glUniform1iv: function (location, count, value) {
GL.validateGLObjectID(GL.uniforms, location, 'glUniform1fv', 'location');
assert((value & 3) == 0, 'Pointer to i32 data passed to glUniform1iv must be aligned to four bytes!');
var view = getArray(value, Int32Array, 1 * count);
gl.uniform1iv(GL.uniforms[location], view);
},
glUniform2iv: function (location, count, value) {
GL.validateGLObjectID(GL.uniforms, location, 'glUniform2fv', 'location');
assert((value & 3) == 0, 'Pointer to i32 data passed to glUniform2iv must be aligned to four bytes!');
var view = getArray(value, Int32Array, 2 * count);
gl.uniform2iv(GL.uniforms[location], view);
},
glUniform3iv: function (location, count, value) {
GL.validateGLObjectID(GL.uniforms, location, 'glUniform3fv', 'location');
assert((value & 3) == 0, 'Pointer to i32 data passed to glUniform3iv must be aligned to four bytes!');
var view = getArray(value, Int32Array, 3 * count);
gl.uniform3iv(GL.uniforms[location], view);
},
glUniform4iv: function (location, count, value) {
GL.validateGLObjectID(GL.uniforms, location, 'glUniform4fv', 'location');
assert((value & 3) == 0, 'Pointer to i32 data passed to glUniform4iv must be aligned to four bytes!');
var view = getArray(value, Int32Array, 4 * count);
gl.uniform4iv(GL.uniforms[location], view);
},
glBlendFunc: function (sfactor, dfactor) {
gl.blendFunc(sfactor, dfactor);
},
glBlendEquationSeparate: function (modeRGB, modeAlpha) {
gl.blendEquationSeparate(modeRGB, modeAlpha);
},
glDisable: function (cap) {
gl.disable(cap);
},
glDrawElements: function (mode, count, type, indices) {
gl.drawElements(mode, count, type, indices);
},
glGetIntegerv: function (name_, p) {
_webglGet(name_, p, 'EM_FUNC_SIG_PARAM_I');
},
glUniform1f: function (location, v0) {
GL.validateGLObjectID(GL.uniforms, location, 'glUniform1f', 'location');
gl.uniform1f(GL.uniforms[location], v0);
},
glUniform1i: function (location, v0) {
GL.validateGLObjectID(GL.uniforms, location, 'glUniform1i', 'location');
gl.uniform1i(GL.uniforms[location], v0);
},
glGetAttribLocation: function (program, name) {
return gl.getAttribLocation(GL.programs[program], UTF8ToString(name));
},
glEnableVertexAttribArray: function (index) {
gl.enableVertexAttribArray(index);
},
glDisableVertexAttribArray: function (index) {
gl.disableVertexAttribArray(index);
},
glVertexAttribPointer: function (index, size, type, normalized, stride, ptr) {
gl.vertexAttribPointer(index, size, type, !!normalized, stride, ptr);
},
glVertexAttribIPointer: function (index, size, type, stride, ptr) {
gl.vertexAttribIPointer(index, size, type, stride, ptr);
},
glGetUniformLocation: function (program, name) {
GL.validateGLObjectID(GL.programs, program, 'glGetUniformLocation', 'program');
name = UTF8ToString(name);
var arrayIndex = 0;
// If user passed an array accessor "[index]", parse the array index off the accessor.
if (name[name.length - 1] == ']') {
var leftBrace = name.lastIndexOf('[');
arrayIndex = name[leftBrace + 1] != ']' ? parseInt(name.slice(leftBrace + 1)) : 0; // "index]", parseInt will ignore the ']' at the end; but treat "foo[]" as "foo[0]"
name = name.slice(0, leftBrace);
}
var uniformInfo = GL.programInfos[program] && GL.programInfos[program].uniforms[name]; // returns pair [ dimension_of_uniform_array, uniform_location ]
if (uniformInfo && arrayIndex >= 0 && arrayIndex < uniformInfo[0]) { // Check if user asked for an out-of-bounds element, i.e. for 'vec4 colors[3];' user could ask for 'colors[10]' which should return -1.
return uniformInfo[1] + arrayIndex;
} else {
return -1;
}
},
glUniformMatrix4fv: function (location, count, transpose, value) {
GL.validateGLObjectID(GL.uniforms, location, 'glUniformMatrix4fv', 'location');
assert((value & 3) == 0, 'Pointer to float data passed to glUniformMatrix4fv must be aligned to four bytes!');
var view = getArray(value, Float32Array, 16);
gl.uniformMatrix4fv(GL.uniforms[location], !!transpose, view);
},
glUseProgram: function (program) {
GL.validateGLObjectID(GL.programs, program, 'glUseProgram', 'program');
gl.useProgram(GL.programs[program]);
},
glGenVertexArrays: function (n, arrays) {
_glGenObject(n, arrays, 'createVertexArray', GL.vaos, 'glGenVertexArrays');
},
glGenFramebuffers: function (n, ids) {
_glGenObject(n, ids, 'createFramebuffer', GL.framebuffers, 'glGenFramebuffers');
},
glGenRenderbuffers: function (n, ids) {
_glGenObject(n, ids, 'createRenderbuffer', GL.renderbuffers, 'glGenRenderbuffers');
},
glBindVertexArray: function (vao) {
gl.bindVertexArray(GL.vaos[vao]);
},
glBindFramebuffer: function (target, framebuffer) {
GL.validateGLObjectID(GL.framebuffers, framebuffer, 'glBindFramebuffer', 'framebuffer');
gl.bindFramebuffer(target, GL.framebuffers[framebuffer]);
},
glBindRenderbuffer: function (target, renderbuffer) {
GL.validateGLObjectID(GL.renderbuffers, renderbuffer, 'glBindRenderbuffer', 'renderbuffer');
gl.bindRenderbuffer(target, GL.renderbuffers[renderbuffer]);
},
glGenBuffers: function (n, buffers) {
_glGenObject(n, buffers, 'createBuffer', GL.buffers, 'glGenBuffers');
},
glBindBuffer: function (target, buffer) {
GL.validateGLObjectID(GL.buffers, buffer, 'glBindBuffer', 'buffer');
gl.bindBuffer(target, GL.buffers[buffer]);
},
glBufferData: function (target, size, data, usage) {
gl.bufferData(target, data ? getArray(data, Uint8Array, size) : size, usage);
},
glBufferSubData: function (target, offset, size, data) {
gl.bufferSubData(target, offset, data ? getArray(data, Uint8Array, size) : size);
},
glEnable: function (cap) {
gl.enable(cap);
},
glFlush: function () {
gl.flush();
},
glFinish: function () {
gl.finish();
},
glDepthFunc: function (func) {
gl.depthFunc(func);
},
glBlendFuncSeparate: function (sfactorRGB, dfactorRGB, sfactorAlpha, dfactorAlpha) {
gl.blendFuncSeparate(sfactorRGB, dfactorRGB, sfactorAlpha, dfactorAlpha);
},
glViewport: function (x, y, width, height) {
gl.viewport(x, y, width, height);
},
glDrawArrays: function (mode, first, count) {
gl.drawArrays(mode, first, count);
},
glDrawBuffers: function (n, bufs) {
gl.drawBuffers(getArray(bufs, Int32Array, n));
},
glCreateProgram: function () {
var id = GL.getNewId(GL.programs);
var program = gl.createProgram();
program.name = id;
GL.programs[id] = program;
return id;
},
glAttachShader: function (program, shader) {
GL.validateGLObjectID(GL.programs, program, 'glAttachShader', 'program');
GL.validateGLObjectID(GL.shaders, shader, 'glAttachShader', 'shader');
gl.attachShader(GL.programs[program], GL.shaders[shader]);
},
glDetachShader: function (program, shader) {
GL.validateGLObjectID(GL.programs, program, 'glDetachShader', 'program');
GL.validateGLObjectID(GL.shaders, shader, 'glDetachShader', 'shader');
gl.detachShader(GL.programs[program], GL.shaders[shader]);
},
glLinkProgram: function (program) {
GL.validateGLObjectID(GL.programs, program, 'glLinkProgram', 'program');
gl.linkProgram(GL.programs[program]);
GL.populateUniformTable(program);
},
glPixelStorei: function (pname, param) {
gl.pixelStorei(pname, param);
},
glFramebufferTexture2D: function (target, attachment, textarget, texture, level) {
GL.validateGLObjectID(GL.textures, texture, 'glFramebufferTexture2D', 'texture');
gl.framebufferTexture2D(target, attachment, textarget, GL.textures[texture], level);
},
glGetProgramiv: function (program, pname, p) {
assert(p);
GL.validateGLObjectID(GL.programs, program, 'glGetProgramiv', 'program');
if (program >= GL.counter) {
console.error("GL_INVALID_VALUE in glGetProgramiv");
return;
}
var ptable = GL.programInfos[program];
if (!ptable) {
console.error('GL_INVALID_OPERATION in glGetProgramiv(program=' + program + ', pname=' + pname + ', p=0x' + p.toString(16) + '): The specified GL object name does not refer to a program object!');
return;
}
if (pname == 0x8B84) { // GL_INFO_LOG_LENGTH
var log = gl.getProgramInfoLog(GL.programs[program]);
assert(log !== null);
getArray(p, Int32Array, 1)[0] = log.length + 1;
} else if (pname == 0x8B87 /* GL_ACTIVE_UNIFORM_MAX_LENGTH */) {
console.error("unsupported operation");
return;
} else if (pname == 0x8B8A /* GL_ACTIVE_ATTRIBUTE_MAX_LENGTH */) {
console.error("unsupported operation");
return;
} else if (pname == 0x8A35 /* GL_ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH */) {
console.error("unsupported operation");
return;
} else {
getArray(p, Int32Array, 1)[0] = gl.getProgramParameter(GL.programs[program], pname);
}
},
glCreateShader: function (shaderType) {
var id = GL.getNewId(GL.shaders);
GL.shaders[id] = gl.createShader(shaderType);
return id;
},
glStencilFuncSeparate: function (face, func, ref_, mask) {
gl.stencilFuncSeparate(face, func, ref_, mask);
},
glStencilMaskSeparate: function (face, mask) {
gl.stencilMaskSeparate(face, mask);
},
glStencilOpSeparate: function (face, fail, zfail, zpass) {
gl.stencilOpSeparate(face, fail, zfail, zpass);
},
glFrontFace: function (mode) {
gl.frontFace(mode);
},
glCullFace: function (mode) {
gl.cullFace(mode);
},
glCopyTexImage2D: function (target, level, internalformat, x, y, width, height, border) {
gl.copyTexImage2D(target, level, internalformat, x, y, width, height, border);
},
glShaderSource: function (shader, count, string, length) {
GL.validateGLObjectID(GL.shaders, shader, 'glShaderSource', 'shader');
var source = GL.getSource(shader, count, string, length);
// https://github.com/emscripten-core/emscripten/blob/incoming/src/library_webgl.js#L2708
if (emscripten_shaders_hack) {
source = source.replace(/#extension GL_OES_standard_derivatives : enable/g, "");
source = source.replace(/#extension GL_EXT_shader_texture_lod : enable/g, '');
var prelude = '';
if (source.indexOf('gl_FragColor') != -1) {
prelude += 'out mediump vec4 GL_FragColor;\n';
source = source.replace(/gl_FragColor/g, 'GL_FragColor');
}
if (source.indexOf('attribute') != -1) {
source = source.replace(/attribute/g, 'in');
source = source.replace(/varying/g, 'out');
} else {
source = source.replace(/varying/g, 'in');
}
source = source.replace(/textureCubeLodEXT/g, 'textureCubeLod');
source = source.replace(/texture2DLodEXT/g, 'texture2DLod');
source = source.replace(/texture2DProjLodEXT/g, 'texture2DProjLod');
source = source.replace(/texture2DGradEXT/g, 'texture2DGrad');
source = source.replace(/texture2DProjGradEXT/g, 'texture2DProjGrad');
source = source.replace(/textureCubeGradEXT/g, 'textureCubeGrad');
source = source.replace(/textureCube/g, 'texture');
source = source.replace(/texture1D/g, 'texture');
source = source.replace(/texture2D/g, 'texture');
source = source.replace(/texture3D/g, 'texture');
source = source.replace(/#version 100/g, '#version 300 es\n' + prelude);
}
gl.shaderSource(GL.shaders[shader], source);
},
glGetProgramInfoLog: function (program, maxLength, length, infoLog) {
GL.validateGLObjectID(GL.programs, program, 'glGetProgramInfoLog', 'program');
var log = gl.getProgramInfoLog(GL.programs[program]);
assert(log !== null);
let array = getArray(infoLog, Uint8Array, maxLength);
for (var i = 0; i < maxLength; i++) {
array[i] = log.charCodeAt(i);
}