124 lines
5.1 KiB
Plaintext
124 lines
5.1 KiB
Plaintext
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.default = ttf2eot;
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var _reader = _interopRequireDefault(require("./reader"));
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var _writer = _interopRequireDefault(require("./writer"));
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var _string = _interopRequireDefault(require("./util/string"));
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var _error = _interopRequireDefault(require("./error"));
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var _table = _interopRequireDefault(require("./table/table"));
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var _struct = _interopRequireDefault(require("./table/struct"));
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var _name = _interopRequireDefault(require("./table/name"));
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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/**
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* @file ttf转eot
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* @author mengke01(kekee000@gmail.com)
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*
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* reference:
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* http://www.w3.org/Submission/EOT/
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* https://github.com/fontello/ttf2eot/blob/master/index.js
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*/
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var EotHead = _table.default.create('head', [['EOTSize', _struct.default.Uint32], ['FontDataSize', _struct.default.Uint32], ['Version', _struct.default.Uint32], ['Flags', _struct.default.Uint32], ['PANOSE', _struct.default.Bytes, 10], ['Charset', _struct.default.Uint8], ['Italic', _struct.default.Uint8], ['Weight', _struct.default.Uint32], ['fsType', _struct.default.Uint16], ['MagicNumber', _struct.default.Uint16], ['UnicodeRange', _struct.default.Bytes, 16], ['CodePageRange', _struct.default.Bytes, 8], ['CheckSumAdjustment', _struct.default.Uint32], ['Reserved', _struct.default.Bytes, 16], ['Padding1', _struct.default.Uint16]]);
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/**
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* ttf格式转换成eot字体格式
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*
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* @param {ArrayBuffer} ttfBuffer ttf缓冲数组
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* @param {Object} options 选项
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* @return {ArrayBuffer} eot格式byte流
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*/
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// eslint-disable-next-line no-unused-vars
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function ttf2eot(ttfBuffer) {
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var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
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// 构造eot头部
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var eotHead = new EotHead();
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var eotHeaderSize = eotHead.size();
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var eot = {};
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eot.head = eotHead.read(new _reader.default(new ArrayBuffer(eotHeaderSize)));
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// set fields
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eot.head.FontDataSize = ttfBuffer.byteLength || ttfBuffer.length;
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eot.head.Version = 0x20001;
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eot.head.Flags = 0;
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eot.head.Charset = 0x1;
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eot.head.MagicNumber = 0x504C;
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eot.head.Padding1 = 0;
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var ttfReader = new _reader.default(ttfBuffer);
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// 读取ttf表个数
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var numTables = ttfReader.readUint16(4);
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if (numTables <= 0 || numTables > 100) {
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_error.default.raise(10101);
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}
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// 读取ttf表索引信息
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ttfReader.seek(12);
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// 需要读取3个表内容，设置3个byte
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var tblReaded = 0;
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for (var i = 0; i < numTables && tblReaded !== 0x7; ++i) {
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var tableEntry = {
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tag: ttfReader.readString(ttfReader.offset, 4),
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checkSum: ttfReader.readUint32(),
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offset: ttfReader.readUint32(),
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length: ttfReader.readUint32()
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};
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var entryOffset = ttfReader.offset;
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if (tableEntry.tag === 'head') {
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eot.head.CheckSumAdjustment = ttfReader.readUint32(tableEntry.offset + 8);
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tblReaded += 0x1;
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} else if (tableEntry.tag === 'OS/2') {
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eot.head.PANOSE = ttfReader.readBytes(tableEntry.offset + 32, 10);
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eot.head.Italic = ttfReader.readUint16(tableEntry.offset + 62);
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eot.head.Weight = ttfReader.readUint16(tableEntry.offset + 4);
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eot.head.fsType = ttfReader.readUint16(tableEntry.offset + 8);
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eot.head.UnicodeRange = ttfReader.readBytes(tableEntry.offset + 42, 16);
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eot.head.CodePageRange = ttfReader.readBytes(tableEntry.offset + 78, 8);
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tblReaded += 0x2;
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}
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// 设置名字信息
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else if (tableEntry.tag === 'name') {
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var names = new _name.default(tableEntry.offset).read(ttfReader);
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eot.FamilyName = _string.default.toUCS2Bytes(names.fontFamily || '');
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eot.FamilyNameSize = eot.FamilyName.length;
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eot.StyleName = _string.default.toUCS2Bytes(names.fontStyle || '');
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eot.StyleNameSize = eot.StyleName.length;
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eot.VersionName = _string.default.toUCS2Bytes(names.version || '');
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eot.VersionNameSize = eot.VersionName.length;
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eot.FullName = _string.default.toUCS2Bytes(names.fullName || '');
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eot.FullNameSize = eot.FullName.length;
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tblReaded += 0x3;
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}
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ttfReader.seek(entryOffset);
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}
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// 计算size
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eot.head.EOTSize = eotHeaderSize + 4 + eot.FamilyNameSize + 4 + eot.StyleNameSize + 4 + eot.VersionNameSize + 4 + eot.FullNameSize + 2 + eot.head.FontDataSize;
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// 这里用小尾方式写入
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var eotWriter = new _writer.default(new ArrayBuffer(eot.head.EOTSize), 0, eot.head.EOTSize, true);
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// write head
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eotHead.write(eotWriter, eot);
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// write names
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eotWriter.writeUint16(eot.FamilyNameSize);
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eotWriter.writeBytes(eot.FamilyName, eot.FamilyNameSize);
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eotWriter.writeUint16(0);
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eotWriter.writeUint16(eot.StyleNameSize);
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eotWriter.writeBytes(eot.StyleName, eot.StyleNameSize);
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eotWriter.writeUint16(0);
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eotWriter.writeUint16(eot.VersionNameSize);
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eotWriter.writeBytes(eot.VersionName, eot.VersionNameSize);
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eotWriter.writeUint16(0);
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eotWriter.writeUint16(eot.FullNameSize);
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eotWriter.writeBytes(eot.FullName, eot.FullNameSize);
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eotWriter.writeUint16(0);
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// write rootstring
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eotWriter.writeUint16(0);
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eotWriter.writeBytes(ttfBuffer, eot.head.FontDataSize);
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return eotWriter.getBuffer();
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} |