75 lines
1.7 KiB
JavaScript
75 lines
1.7 KiB
JavaScript
/**
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* @file ttfreader.js
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* @author mengke01
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* @date
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* @description
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* ttf定义
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*
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* thanks to：
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* ynakajima/ttf.js
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* https://github.com/ynakajima/ttf.js
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*/
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define(
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function(require) {
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var directory = require('./table/directory');
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var supportTables = require('./table/support');
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var reader = require('./reader');
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/**
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* 初始化
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*/
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function init() {
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var reader = this.reader;
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var ttf = this.ttf;
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// version
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ttf.version = reader.readFixed(0);
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// num tables
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ttf.numTables = reader.readUint16();
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// searchRenge
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ttf.searchRenge = reader.readUint16();
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// entrySelector
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ttf.entrySelector = reader.readUint16();
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// rengeShift
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ttf.rengeShift = reader.readUint16();
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ttf.tables = new directory(reader.offset).read(reader, ttf);
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// 读取支持的表数据
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Object.keys(supportTables).forEach(function(tableName) {
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// console.log(tableName);
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var offset = ttf.tables[tableName].offset;
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ttf[tableName] = new supportTables[tableName](offset).read(reader, ttf);
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});
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}
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/**
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* TTF的构造函数
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*
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* @constructor
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*/
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function TTFReader() {
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}
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/**
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* 获取解析后的ttf文档
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*
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* @return {Object} ttf文档
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*/
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TTFReader.prototype.read = function(buffer) {
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this.reader = new reader(buffer, 0, buffer.byteLength, false);
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this.ttf = {};
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init.call(this);
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return this.ttf;
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};
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return TTFReader;
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}
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);
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