536 lines
18 KiB
JavaScript
536 lines
18 KiB
JavaScript
// Includes snippets from https://surma.dev/things/c-to-webassembly/ and https://developer.mozilla.org/en-US/docs/WebAssembly/Using_the_JavaScript_API -->
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let memory = null;
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let heapu8 = null;
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let heapu16 = null;
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let heapu32 = null;
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let heapi32 = null;
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let heapf32 = null;
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let mod = null;
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let instance = null;
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function create_thread(func) {
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console.log('Creating thread');
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const thread_starter = new Worker('thread_starter.js');
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const arr = new Uint8Array(memory.buffer, func, 256);
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let str = '';
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for (let i = 0; arr[i] != 0; ++i) {
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str += String.fromCharCode(arr[i]);
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}
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thread_starter.postMessage({ mod, memory, func: str });
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}
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async function start_audio_thread() {
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const audioContext = new AudioContext();
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await audioContext.audioWorklet.addModule('audio-thread.js');
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const audioThreadNode = new AudioWorkletNode(audioContext, 'audio-thread');
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audioThreadNode.port.postMessage({ mod, memory });
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audioThreadNode.connect(audioContext.destination);
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}
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function read_string(ptr) {
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let str = '';
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for (let i = 0; heapu8[ptr + i] != 0; ++i) {
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str += String.fromCharCode(heapu8[ptr + i]);
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}
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return str;
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}
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function write_string(ptr, str) {
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for (let i = 0; i < str.length; ++i) {
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heapu8[ptr + i] = str.charCodeAt(i);
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}
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heapu8[ptr + str.length] = 0;
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}
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async function init() {
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let wasm_bytes = null;
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await fetch("./ShaderTest.wasm").then(res => res.arrayBuffer()).then(buffer => wasm_bytes = new Uint8Array(buffer));
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// Read memory size from wasm file
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let memory_size = 0;
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let i = 8;
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while (i < wasm_bytes.length) {
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function read_leb() {
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let result = 0;
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let shift = 0;
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while (true) {
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let byte = wasm_bytes[i++];
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result |= (byte & 0x7f) << shift;
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if ((byte & 0x80) == 0) return result;
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shift += 7;
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}
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}
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let type = read_leb()
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let length = read_leb()
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if (type == 6) {
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read_leb(); // count
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i++; // gtype
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i++; // mutable
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read_leb(); // opcode
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memory_size = read_leb() / 65536 + 1;
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break;
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}
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i += length;
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}
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memory = new WebAssembly.Memory({ initial: memory_size, maximum: memory_size, shared: true });
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heapu8 = new Uint8Array(memory.buffer);
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heapu16 = new Uint16Array(memory.buffer);
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heapu32 = new Uint32Array(memory.buffer);
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heapi32 = new Int32Array(memory.buffer);
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heapf32 = new Float32Array(memory.buffer);
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const kanvas = document.getElementById('kanvas');
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const gl = kanvas.getContext('webgl2', { antialias: false, alpha: false });
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// gl.pixelStorei(gl.UNPACK_PREMULTIPLY_ALPHA_WEBGL, 1);
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gl.getExtension("EXT_color_buffer_float");
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gl.getExtension("OES_texture_float_linear");
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gl.getExtension("OES_texture_half_float_linear");
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gl.getExtension("EXT_texture_filter_anisotropic");
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let file_buffer = null;
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let file_buffer_pos = 0;
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let gl_programs = [null];
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let gl_shaders = [null];
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let gl_buffers = [null];
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let gl_framebuffers = [null];
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let gl_renderbuffers = [null];
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let gl_textures = [null];
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let gl_locations = [null];
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const result = await WebAssembly.instantiate(
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wasm_bytes, {
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env: { memory },
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imports: {
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create_thread,
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glViewport: function(x, y, width, height) {
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gl.viewport(x, y, width, height);
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},
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glScissor: function(x, y, width, height) {
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gl.scissor(x, y, width, height);
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},
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glGetIntegerv: function(pname, data) {
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if (pname == 2) { // GL_MAJOR_VERSION
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heapu32[data / 4] = 3;
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}
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else {
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heapu32[data / 4] = gl.getParameter(pname);
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}
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},
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glGetFloatv: function(pname, data) {
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heapf32[data / 4] = gl.getParameter(pname);
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},
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glGetString: function(name) {
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// return gl.getParameter(name);
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},
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glDrawElements: function(mode, count, type, offset) {
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gl.drawElements(mode, count, type, offset);
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},
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glDrawElementsInstanced: function(mode, count, type, indices, instancecount) {
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gl.drawElementsInstanced(mode, count, type, indices, instancecount);
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},
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glVertexAttribDivisor: function(index, divisor) {
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gl.vertexAttribDivisor(index, divisor);
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},
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glBindFramebuffer: function(target, framebuffer) {
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gl.bindFramebuffer(target, gl_framebuffers[framebuffer]);
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},
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glFramebufferTexture2D: function(target, attachment, textarget, texture, level) {
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gl.framebufferTexture2D(target, attachment, textarget, gl_textures[texture], level);
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if (gl.checkFramebufferStatus(gl.FRAMEBUFFER) != gl.FRAMEBUFFER_COMPLETE) {
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console.log("Incomplete framebuffer");
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}
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},
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glGenFramebuffers: function(n, framebuffers) {
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for (let i = 0; i < n; ++i) {
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gl_framebuffers.push(gl.createFramebuffer());
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heapu32[framebuffers / 4 + i] = gl_framebuffers.length - 1;
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}
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},
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glGenRenderbuffers: function(n, renderbuffers) {
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for (let i = 0; i < n; ++i) {
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gl_renderbuffers.push(gl.createRenderbuffer());
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heapu32[renderbuffers / 4 + i] = gl_renderbuffers.length - 1;
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}
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},
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glBindRenderbuffer: function(target, renderbuffer) {
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gl.bindRenderbuffer(target, gl_renderbuffers[renderbuffer]);
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},
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glRenderbufferStorage: function(target, internalformat, width, height) {
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gl.renderbufferStorage(target, internalformat, width, height)
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},
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glFramebufferRenderbuffer: function(target, attachment, renderbuffertarget, renderbuffer) {
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gl.framebufferRenderbuffer(target, attachment, renderbuffertarget, gl_renderbuffers[renderbuffer]);
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},
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glReadPixels: function(x, y, width, height, format, type, data) {
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let pixels = type == gl.FLOAT ? heapf32.subarray(data / 4) : heapu8.subarray(data);
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gl.readPixels(x, y, width, height, format, type, pixels);
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},
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glTexSubImage2D: function(target, level, xoffset, yoffset, width, height, format, type, pixels) {
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gl.texSubImage2D(target, level, xoffset, yoffset, width, height, format, type, heapu8.subarray(pixels));
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},
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glEnable: function(cap) {
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gl.enable(cap);
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},
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glDisable: function(cap) {
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gl.disable(cap);
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},
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glColorMask: function(red, green, blue, alpha) {
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gl.colorMask(red, green, blue, alpha);
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},
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glClearColor: function(red, green, blue, alpha) {
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gl.clearColor(red, green, blue, alpha);
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},
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glDepthMask: function(flag) {
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gl.depthMask(flag);
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},
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glClearDepthf: function(depth) {
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gl.clearDepth(depth);
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},
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glStencilMask: function(mask) {
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gl.stencilMask(mask);
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},
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glClearStencil: function(s) {
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gl.clearStencil(s);
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},
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glClear: function(mask) {
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gl.clear(mask);
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},
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glBindBuffer: function(target, buffer) {
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gl.bindBuffer(target, gl_buffers[buffer]);
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},
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glUseProgram: function(program) {
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gl.useProgram(gl_programs[program]);
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},
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glStencilMaskSeparate: function(face, mask) {
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gl.stencilMaskSeparate(face, mask);
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},
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glStencilOpSeparate: function(face, fail, zfail, zpass) {
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gl.stencilOpSeparate(face, fail, zfail, zpass);
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},
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glStencilFuncSeparate: function(face, func, ref, mask) {
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gl.stencilFuncSeparate(face, func, ref, mask);
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},
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glDepthFunc: function(func) {
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gl.depthFunc(func);
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},
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glCullFace: function(mode) {
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gl.cullFace(mode);
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},
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glBlendFuncSeparate: function(src_rgb, dst_rgb, src_alpha, dst_alpha) {
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gl.blendFuncSeparate(src_rgb, dst_rgb, src_alpha, dst_alpha);
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},
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glBlendEquationSeparate: function(mode_rgb, mode_alpha) {
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gl.blendEquationSeparate(mode_rgb, mode_alpha);
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},
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glGenBuffers: function(n, buffers) {
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for (let i = 0; i < n; ++i) {
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gl_buffers.push(gl.createBuffer());
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heapu32[buffers / 4 + i] = gl_buffers.length - 1;
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}
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},
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glBufferData: function(target, size, data, usage) {
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gl.bufferData(target, heapu8.subarray(data, data + Number(size)), usage);
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},
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glCreateProgram: function() {
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gl_programs.push(gl.createProgram());
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return gl_programs.length - 1;
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},
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glAttachShader: function(program, shader) {
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gl.attachShader(gl_programs[program], gl_shaders[shader]);
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},
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glBindAttribLocation: function(program, index, name) {
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gl.bindAttribLocation(gl_programs[program], index, read_string(name));
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},
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glLinkProgram: function(program) {
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gl.linkProgram(gl_programs[program]);
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},
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glGetProgramiv: function(program, pname, params) {
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heapu32[params / 4] = gl.getProgramParameter(gl_programs[program], pname);
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},
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glGetProgramInfoLog: function(program) {
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console.log(gl.getProgramInfoLog(gl_programs[program]));
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},
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glCreateShader: function(type) {
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gl_shaders.push(gl.createShader(type));
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return gl_shaders.length - 1;
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},
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glShaderSource: function(shader, count, source, length) {
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gl.shaderSource(gl_shaders[shader], read_string(heapu32[source / 4]));
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},
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glCompileShader: function(shader) {
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gl.compileShader(gl_shaders[shader]);
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},
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glGetShaderiv: function(shader, pname, params) {
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heapu32[params / 4] = gl.getShaderParameter(gl_shaders[shader], pname);
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},
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glGetShaderInfoLog: function(shader) {
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console.log(gl.getShaderInfoLog(gl_shaders[shader]));
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},
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glBufferSubData: function(target, offset, size, data) {
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gl.bufferSubData(target, Number(offset), heapu8.subarray(data, data + Number(size)), 0);
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},
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glEnableVertexAttribArray: function(index) {
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gl.enableVertexAttribArray(index);
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},
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glVertexAttribPointer: function(index, size, type, normalized, stride, offset) {
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gl.vertexAttribPointer(index, size, type, normalized, stride, offset);
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},
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glDisableVertexAttribArray: function(index) {
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gl.disableVertexAttribArray(index);
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},
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glGetUniformLocation: function(program, name) {
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gl_locations.push(gl.getUniformLocation(gl_programs[program], read_string(name)));
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return gl_locations.length - 1;
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},
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glUniform1i: function(location, v0) {
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gl.uniform1i(gl_locations[location], v0);
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},
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glUniform2i: function(location, v0, v1) {
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gl.uniform2i(gl_locations[location], v0, v1);
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},
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glUniform3i: function(location, v0, v1, v2) {
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gl.uniform3i(gl_locations[location], v0, v1, v2);
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},
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glUniform4i: function(location, v0, v1, v2, v3) {
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gl.uniform4i(gl_locations[location], v0, v1, v2, v3);
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},
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glUniform1iv: function(location, count, value) {
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gl.uniform1iv(gl_locations[location], count, heapi32.subarray(value / 4));
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},
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glUniform2iv: function(location, count, value) {
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gl.uniform2iv(gl_locations[location], count, heapi32.subarray(value / 4));
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},
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glUniform3iv: function(location, count, value) {
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gl.uniform3iv(gl_locations[location], count, heapi32.subarray(value / 4));
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},
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glUniform4iv: function(location, count, value) {
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gl.uniform4iv(gl_locations[location], count, heapi32.subarray(value / 4));
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},
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glUniform1f: function(location, v0) {
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gl.uniform1f(gl_locations[location], v0);
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},
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glUniform2f: function(location, v0, v1) {
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gl.uniform2f(gl_locations[location], v0, v1);
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},
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glUniform3f: function(location, v0, v1, v2) {
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gl.uniform3f(gl_locations[location], v0, v1, v2);
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},
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glUniform4f: function(location, v0, v1, v2, v3) {
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gl.uniform4f(gl_locations[location], v0, v1, v2, v3);
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},
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glUniform1fv: function(location, count, value) {
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var f32 = new Float32Array(memory.buffer, value, count);
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gl.uniform1fv(gl_locations[location], f32);
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},
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glUniform2fv: function(location, count, value) {
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var f32 = new Float32Array(memory.buffer, value, count * 2);
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gl.uniform2fv(gl_locations[location], f32);
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},
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glUniform3fv: function(location, count, value) {
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var f32 = new Float32Array(memory.buffer, value, count * 3);
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gl.uniform3fv(gl_locations[location], f32);
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},
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glUniform4fv: function(location, count, value) {
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var f32 = new Float32Array(memory.buffer, value, count * 4);
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gl.uniform4fv(gl_locations[location], f32);
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},
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glUniformMatrix3fv: function(location, count, transpose, value) {
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var f32 = new Float32Array(memory.buffer, value, 3 * 3);
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gl.uniformMatrix3fv(gl_locations[location], transpose, f32);
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},
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glUniformMatrix4fv: function(location, count, transpose, value) {
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var f32 = new Float32Array(memory.buffer, value, 4 * 4);
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gl.uniformMatrix4fv(gl_locations[location], transpose, f32);
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},
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glTexParameterf: function(target, pname, param) {
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gl.texParameterf(target, pname, param);
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},
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glActiveTexture: function(texture) {
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gl.activeTexture(texture);
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},
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glBindTexture: function(target, texture) {
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gl.bindTexture(target, gl_textures[texture]);
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},
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glTexParameteri: function(target, pname, param) {
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gl.texParameteri(target, pname, param);
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},
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glGetActiveUniform: function(program, index, bufSize, length, size, type, name) {
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let u = gl.getActiveUniform(gl_programs[program], index);
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heapu32[size / 4] = u.size;
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heapu32[type / 4] = u.type;
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write_string(name, u.name);
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},
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glGenTextures: function(n, textures) {
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for (let i = 0; i < n; ++i) {
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gl_textures.push(gl.createTexture());
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heapu32[textures / 4 + i] = gl_textures.length - 1;
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}
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},
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glTexImage2D: function(target, level, internalformat, width, height, border, format, type, data) {
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let pixels = type == gl.FLOAT ? heapf32.subarray(data / 4) :
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type == gl.UNSIGNED_INT ? heapu32.subarray(data / 4) :
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type == gl.UNSIGNED_SHORT ? heapu16.subarray(data / 2) :
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type == gl.HALF_FLOAT ? heapu16.subarray(data / 2) : heapu8.subarray(data);
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gl.texImage2D(target, level, internalformat, width, height, border, format, type, pixels);
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},
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glPixelStorei: function(pname, param) {
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gl.pixelStorei(pname, param);
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},
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glCompressedTexImage2D: function(target, level, internalformat, width, height, border, imageSize, data) {
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gl.compressedTexImage2D(target, level, internalformat, width, height, border, imageSize, heapu8.subarray(data));
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},
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glDrawBuffers: function(n, bufs) {
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let ar = [];
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for (let i = 0; i < n; ++i) {
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ar.push(gl.COLOR_ATTACHMENT0 + i);
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}
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gl.drawBuffers(ar);
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},
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glGenerateMipmap: function(target) {
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gl.generateMipmap(target);
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},
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glFlush: function() {
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gl.flush();
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},
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glDeleteBuffers: function(n, buffers) {
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for (let i = 0; i < n; ++i) {
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gl.deleteBuffer(gl_buffers[heapu32[buffers / 4 + i]]);
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}
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},
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glDeleteTextures: function(n, textures) {
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for (let i = 0; i < n; ++i) {
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gl.deleteTexture(gl_textures[heapu32[textures / 4 + i]]);
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}
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},
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glDeleteFramebuffers: function(n, framebuffers) {
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for (let i = 0; i < n; ++i) {
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gl.deleteFramebuffer(gl_framebuffers[heapu32[framebuffers / 4 + i]]);
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}
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},
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glDeleteProgram: function(program) {
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gl.deleteProgram(gl_programs[program]);
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},
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glDeleteShader: function(shader) {
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gl.deleteShader(gl_shaders[shader]);
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},
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js_fprintf: function(format) {
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console.log(read_string(format));
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},
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js_fopen: function(filename) {
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const req = new XMLHttpRequest();
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req.open("GET", read_string(filename), false);
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req.overrideMimeType("text/plain; charset=x-user-defined");
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req.send();
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let str = req.response;
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file_buffer_pos = 0;
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file_buffer = new ArrayBuffer(str.length);
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let buf_view = new Uint8Array(file_buffer);
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for (let i = 0; i < str.length; ++i) {
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buf_view[i] = str.charCodeAt(i);
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}
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return 1;
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},
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js_ftell: function(stream) {
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return file_buffer_pos;
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},
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js_fseek: function(stream, offset, origin) {
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file_buffer_pos = offset;
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if (origin == 1) file_buffer_pos += file_buffer.byteLength; // SEEK_END
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return 0;
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},
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js_fread: function(ptr, size, count, stream) {
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let buf_view = new Uint8Array(file_buffer);
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for (let i = 0; i < count; ++i) {
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heapu8[ptr + i] = buf_view[file_buffer_pos++];
|
|
}
|
|
return count;
|
|
},
|
|
js_time: function() {
|
|
return window.performance.now();
|
|
},
|
|
js_pow: function(x) {
|
|
return Math.pow(x);
|
|
},
|
|
js_floor: function(x) {
|
|
return Math.floor(x);
|
|
},
|
|
js_sin: function(x) {
|
|
return Math.sin(x);
|
|
},
|
|
js_cos: function(x) {
|
|
return Math.cos(x);
|
|
},
|
|
js_tan: function(x) {
|
|
return Math.tan(x);
|
|
},
|
|
js_log: function(base, exponent) {
|
|
return Math.log(base, exponent);
|
|
},
|
|
js_exp: function(x) {
|
|
return Math.exp(x);
|
|
},
|
|
js_sqrt: function(x) {
|
|
return Math.sqrt(x);
|
|
},
|
|
js_eval: function(str) {
|
|
(1, eval)(read_string(str));
|
|
}
|
|
}
|
|
}
|
|
);
|
|
|
|
mod = result.module;
|
|
instance = result.instance;
|
|
instance.exports._start();
|
|
|
|
function update() {
|
|
instance.exports._update();
|
|
window.requestAnimationFrame(update);
|
|
}
|
|
window.requestAnimationFrame(update);
|
|
|
|
kanvas.addEventListener('click', (event) => {
|
|
// start_audio_thread();
|
|
});
|
|
|
|
kanvas.addEventListener('contextmenu', (event) => {
|
|
event.preventDefault();
|
|
});
|
|
|
|
kanvas.addEventListener('mousedown', (event) => {
|
|
instance.exports._mousedown(event.button, event.clientX, event.clientY);
|
|
});
|
|
|
|
kanvas.addEventListener('mouseup', (event) => {
|
|
instance.exports._mouseup(event.button, event.clientX, event.clientY);
|
|
});
|
|
|
|
kanvas.addEventListener('mousemove', (event) => {
|
|
instance.exports._mousemove(event.clientX, event.clientY);
|
|
});
|
|
|
|
kanvas.addEventListener('wheel', (event) => {
|
|
instance.exports._wheel(event.deltaY);
|
|
});
|
|
|
|
kanvas.addEventListener('keydown', (event) => {
|
|
if (event.repeat) {
|
|
event.preventDefault();
|
|
return;
|
|
}
|
|
instance.exports._keydown(event.keyCode);
|
|
});
|
|
|
|
kanvas.addEventListener('keyup', (event) => {
|
|
if (event.repeat) {
|
|
event.preventDefault();
|
|
return;
|
|
}
|
|
instance.exports._keyup(event.keyCode);
|
|
});
|
|
}
|
|
|
|
init();
|