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WebAssembly from 'webassembly';\n\n//\n// Canvas\n//\nconst createCanvas = (x, y, width, height) => {\n // Create canvas\n const canvas = document.createElement('canvas');\n canvas.width = width;\n canvas.height = height;\n\n // Set css-based location\n canvas.style.position = 'absolute';\n canvas.style.left = String(x);\n canvas.style.top = String(y);\n canvas.style.zIndex = '-1';\n\n // Append canvas to dom and return canvas\n document.body.appendChild(canvas);\n return canvas;\n};\n\n//\n// Drawing function\n// Generally (maybe always?) these will map 1:1 to the WASM-C imports\n//\nconst clearCanvas = (ctx) => {\n const x = 0;\n const y = 0;\n ctx.clearRect(x, y, ctx.canvas.width, ctx.canvas.height);\n};\n\nconst drawVertex = (ctx, id, x, y, color) => {\n ctx.strokeStyle = `rgba(${color.r}, ${color.g}, ${color.b}, ${color.a})`;\n ctx.fillStyle = `rgba(${color.r}, ${color.g}, ${color.b}, ${color.a / 2})`;\n\n const r = 12;\n const startAngle = 0;\n const endAngle = 2 * Math.PI;\n\n ctx.beginPath();\n ctx.arc(x, y, r, startAngle, endAngle, false);\n ctx.stroke();\n ctx.fill();\n\n // ctx.font = '12px Arial black';\n // ctx.fillStyle = 'black';\n // ctx.textAlign = 'center';\n // ctx.fillText(id, x, y);\n};\n\nconst drawEdge = (ctx, x1, y1, x2, y2, color) => {\n ctx.strokeStyle = `rgba(${color.r}, ${color.g}, ${color.b}, ${color.a})`;\n\n ctx.beginPath();\n ctx.moveTo(x1, y1);\n ctx.lineTo(x2, y2);\n ctx.stroke();\n};\n\nconst drawTriangle = (ctx, x1, y1, x2, y2, x3, y3, color) => {\n ctx.fillStyle = `rgba(${color.r}, ${color.g}, ${color.b}, ${color.a})`;\n\n ctx.beginPath();\n ctx.moveTo(x1, y1);\n ctx.lineTo(x2, y2);\n ctx.lineTo(x3, y3);\n // ctx.closePath();\n ctx.fill();\n};\n\n//\n// Wasm\n//\nconst loadWasm = async (wasmPath, ctx, vertexColor, edgeColor, triangleColor) => {\n const wasmModule = await WebAssembly.load(wasmPath, {\n imports: {\n jsSetInterval: (f, n) => {\n // setInterval is a JS function that calls the provided function every n milliseconds\n setInterval(() => wasmModule.exports.runCallback(f), n);\n },\n jsClearCanvas: () => clearCanvas(ctx),\n jsDrawVertex: (id, x, y) => drawVertex(ctx, id, x, y, vertexColor),\n jsDrawEdge: (x1, y1, x2, y2) => drawEdge(ctx, x1, y1, x2, y2, edgeColor),\n jsDrawTriangle: (x1, y1, x2, y2, x3, y3) => drawTriangle(ctx, x1, y1, x2, y2, x3, y3, triangleColor),\n },\n });\n\n return wasmModule;\n};\n\n//\n// Start\n//\nexport const start = async (options, version) => {\n // Create the canvas\n const canvas = createCanvas(options.x, options.y, options.width, options.height);\n const ctx = canvas.getContext('2d');\n\n // Start the wasm module\n const wasmPath = `https://unpkg.com/@benwiz/boba.wasm@${version}/dist/boba.wasm`;\n const wasmModule = await loadWasm(\n wasmPath,\n ctx,\n options.vertexColor,\n options.edgeColor,\n options.triangleColor,\n );\n wasmModule.exports.start(\n options.width,\n options.height,\n options.vertexMinRadius,\n options.vertexMaxRadius,\n options.vertexMinSpeed,\n options.vertexMaxSpeed,\n options.drawVertices,\n options.drawEdges,\n options.drawTriangles,\n );\n};\n\n// const options = {\n// // Canvas\n// x: 0,\n// y: 0,\n// width: document.documentElement.scrollWidth,\n// height: document.documentElement.scrollHeight,\n// // Vertices\n// drawVertices: true,\n// vertexMinRadius: 8,\n// vertexMaxRadius: 16,\n// vertexMinSpeed: 0.5,\n// vertexMaxSpeed: 0.8,\n// vertexColor: {\n// r: 30,\n// g: 144,\n// b: 255,\n// a: 0.2,\n// },\n// // Edges\n// drawEdges: true,\n// edgeColor: {\n// r: 30,\n// g: 144,\n// b: 255,\n// a: 0.2,\n// },\n// // Triangles\n// drawTriangles: true,\n// triangleColor: {\n// r: 30,\n// g: 144,\n// b: 255,\n// a: 0.2,\n// },\n// };\n// start(options, version);\n\n\n\n// WEBPACK FOOTER //\n// ./src/index.js","module.exports = require(\"./src\");\r\n\n\n\n// WEBPACK FOOTER //\n// ./node_modules/webassembly/index.js","\"use strict\";\r\n\r\nif (typeof window !== \"undefined\" && window)\r\n window.webassembly = exports;\r\n\r\n// Common aliases\r\nvar getOwnPropertyNames = Object.getOwnPropertyNames;\r\n\r\n/**\r\n * Describes a module instance as returned by {@link load}.\r\n * @interface IModule\r\n * @property {Object.<string,*>} exports Exports\r\n * @property {Object.<string,*>} imports Imports\r\n * @property {IMemory} memory Memory\r\n * @property {Object.<string,*>} env Environment\r\n */\r\n\r\n/**\r\n * Describes a module memory instance.\r\n * @interface IMemory\r\n * @property {ArrayBuffer} buffer Underlying buffer\r\n * @property {number} initial=1 Specified initial amount of memory in 64k pages\r\n * @property {number} [maximum] If specified, maximum amount of memory in 64k pages\r\n * @property {Uint8Array} U8 Byte-level view\r\n * @property {Uint32Array} U32 Aligned unsigned 32-bit integer view\r\n * @property {Int32Array} S32 Aligned signed 32-bit integer view\r\n * @property {Float32Array} F32 Aligned 32-bit float view\r\n * @property {Float64Array} F64 Aligned 64-bit double view\r\n * @property {GetInt} getInt Reads a 32-bit signed integer starting at the specified memory offset (aligned to 4 bytes)\r\n * @property {GetUint} getUint Reads a 32-bit unsigned integer starting at the specified memory offset (aligned to 4 bytes)\r\n * @property {GetFloat} getFloat Reads a 32-bit float starting at the specified memory offset (aligned to 4 bytes)\r\n * @property {GetDouble} getDouble Reads a 64-bit double starting at the specified memory offset (aligned to 8 bytes)\r\n * @property {GetString} getString Reads the (zero-terminated, exclusive) string starting at the specified memory offset (aligned to 4 bytes)\r\n */\r\n\r\n/**\r\n * Loads a WebAssembly.\r\n * @param {string} file File name\r\n * @param {LoadOptions} [options] Options\r\n * @returns {Promise.<IModule>} Promise resolving to the instantiated module\r\n */\r\nfunction load(file, options) {\r\n\r\n /**\r\n * Options as used by {@link load}.\r\n * @interface LoadOptions\r\n * @property {number} [initialMemory=1] Initial memory in pages of 64k\r\n * @property {number} [maximumMemory] Maximum memory in pages of 64k\r\n * @property {Object.<string,*>} [imports] Imports\r\n */\r\n\r\n options || (options = {});\r\n\r\n var imports = options.imports || {};\r\n\r\n // Initialize memory\r\n\r\n var memory = imports.memory;\r\n if (!memory) {\r\n var opts = { initial: options.initialMemory || 1 };\r\n if (options.maximumMemory)\r\n opts.maximum = options.maximumMemory;\r\n memory = new WebAssembly.Memory(opts);\r\n memory.initial = options.initialMemory || 1;\r\n memory.maximum = options.maximumMemory;\r\n }\r\n\r\n var table = imports.table;\r\n if (!table)\r\n table = new WebAssembly.Table({ initial: 0, element: \"anyfunc\" });\r\n\r\n function grow() {\r\n var buf = memory.buffer;\r\n memory.U8 = new Uint8Array (buf);\r\n memory.S32 = new Int32Array (buf);\r\n memory.U32 = new Uint32Array (buf);\r\n memory.F32 = new Float32Array(buf);\r\n memory.F64 = new Float64Array(buf);\r\n }\r\n\r\n grow();\r\n\r\n // Add utilty to memory\r\n\r\n /**\r\n * Reads a 32-bit signed integer starting at the specified memory offset.\r\n * @typedef GetInt\r\n * @function\r\n * @param {number} ptr Memory offset\r\n * @returns {number} Signed 32-bit integer value\r\n */\r\n function getInt(ptr) {\r\n return memory.S32[ptr >> 2];\r\n }\r\n\r\n memory.getInt = getInt;\r\n\r\n /**\r\n * Reads a 32-bit unsigned integer starting at the specified memory offset.\r\n * @typedef GetUint\r\n * @function\r\n * @param {number} ptr Memory offset\r\n * @returns {number} Unsigned 32-bit integer value\r\n */\r\n function getUint(ptr) {\r\n return memory.U32[ptr >> 2];\r\n }\r\n\r\n memory.getUint = getUint;\r\n\r\n /**\r\n * Reads a 32-bit float starting at the specified memory offset.\r\n * @typedef GetFloat\r\n * @function\r\n * @param {number} ptr Memory offset\r\n * @returns {number} 32-bit float value\r\n */\r\n function getFloat(ptr) {\r\n return memory.F32[ptr >> 2];\r\n }\r\n\r\n memory.getFloat = getFloat;\r\n\r\n /**\r\n * Reads a 64-bit double starting at the specified memory offset.\r\n * @typedef GetDouble\r\n * @function\r\n * @param {number} ptr Memory offset\r\n * @returns {number} 64-bit float value\r\n */\r\n function getDouble(ptr) {\r\n return memory.F64[ptr >> 3];\r\n }\r\n\r\n memory.getDouble = getDouble;\r\n\r\n /**\r\n * Reads a (zero-terminated, exclusive) string starting at the specified memory offset.\r\n * @typedef GetString\r\n * @function\r\n * @param {number} ptr Memory offset\r\n * @returns {string} String value\r\n */\r\n function getString(ptr) {\r\n var start = (ptr >>>= 0);\r\n while (memory.U8[ptr++]);\r\n getString.bytes = ptr - start;\r\n return String.fromCharCode.apply(null, memory.U8.subarray(start, ptr - 1));\r\n }\r\n\r\n memory.getString = getString;\r\n\r\n // Initialize environment\r\n\r\n var env = {};\r\n\r\n env.memoryBase = imports.memoryBase || 0;\r\n env.memory = memory;\r\n env.tableBase = imports.tableBase || 0;\r\n env.table = table;\r\n\r\n // Add console to environment\r\n\r\n function sprintf(ptr, base) {\r\n var s = getString(ptr);\r\n return base\r\n ? s.replace(/%([dfisu]|lf)/g, ($0, $1) => {\r\n var val;\r\n return base +=\r\n $1 === \"u\" ? (val = getUint(base), 4)\r\n : $1 === \"f\" ? (val = getFloat(base), 4)\r\n : $1 === \"s\" ? (val = getString(getUint(base)), 4)\r\n : $1 === \"lf\" ? (val = getDouble(base), 8)\r\n : (val = getInt(base), 4)\r\n , val;\r\n })\r\n : s;\r\n }\r\n\r\n getOwnPropertyNames(console).forEach(key => {\r\n if (typeof console[key] === \"function\") // eslint-disable-line no-console\r\n env[\"console_\" + key] = (ptr, base) => {\r\n console[key](sprintf(ptr, base)); // eslint-disable-line no-console\r\n };\r\n });\r\n\r\n // Add Math to environment\r\n\r\n getOwnPropertyNames(Math).forEach(key => {\r\n if (typeof Math[key] === \"function\")\r\n env[\"Math_\" + key] = Math[key];\r\n });\r\n\r\n // Add imports to environment\r\n\r\n Object.keys(imports).forEach(key => env[key] = imports[key]);\r\n\r\n // Add default exit listeners if not explicitly imported\r\n\r\n if (!env._abort)\r\n env._abort = errno => { throw Error(\"abnormal abort in \" + file + \": \" + errno); };\r\n if (!env._exit)\r\n env._exit = code => { if (code) throw Error(\"abnormal exit in \" + file + \": \" + code); }\r\n\r\n // Finally, fetch the assembly and instantiate it\r\n\r\n env._grow = grow;\r\n\r\n return (typeof fetch === \"function\" && fetch || fetch_node)(file)\r\n .then(result => result.arrayBuffer())\r\n .then(buffer => WebAssembly.instantiate(buffer, { env: env }))\r\n .then(module => {\r\n var instance = module.instance;\r\n instance.imports = imports;\r\n instance.memory = memory;\r\n instance.env = env;\r\n return instance;\r\n });\r\n}\r\n\r\nexports.load = load;\r\n\r\n// Internal fetch API polyfill for node that doesn't trigger webpack\r\nvar fs;\r\nfunction fetch_node(file) {\r\n return new Promise((resolve, reject) => (fs || (fs = eval(\"equire\".replace(/^/, \"r\"))(\"fs\"))).readFile(file, (err, data) => err ? reject(err) : resolve({ arrayBuffer: () => data })));\r\n}\r\n\n\n\n// WEBPACK FOOTER //\n// ./node_modules/webassembly/src/index.js"],"sourceRoot":""} |