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58 lines
1.9 KiB
Plaintext
58 lines
1.9 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 = void 0;
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var _table = _interopRequireDefault(require("./table"));
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var _struct = _interopRequireDefault(require("./struct"));
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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/**
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* @file loca表
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* @author mengke01(kekee000@gmail.com)
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*/
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var _default = exports.default = _table.default.create('loca', [], {
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read: function read(reader, ttf) {
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var offset = this.offset;
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var indexToLocFormat = ttf.head.indexToLocFormat;
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// indexToLocFormat有2字节和4字节的区别
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var type = _struct.default.names[indexToLocFormat === 0 ? _struct.default.Uint16 : _struct.default.Uint32];
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var size = indexToLocFormat === 0 ? 2 : 4; // 字节大小
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var sizeRatio = indexToLocFormat === 0 ? 2 : 1; // 真实地址偏移
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var wordOffset = [];
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reader.seek(offset);
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var numGlyphs = ttf.maxp.numGlyphs;
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for (var i = 0; i < numGlyphs; ++i) {
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wordOffset.push(reader.read(type, offset, false) * sizeRatio);
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offset += size;
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}
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return wordOffset;
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},
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write: function write(writer, ttf) {
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var glyfSupport = ttf.support.glyf;
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var offset = ttf.support.glyf.offset || 0;
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var indexToLocFormat = ttf.head.indexToLocFormat;
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var sizeRatio = indexToLocFormat === 0 ? 0.5 : 1;
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var numGlyphs = ttf.glyf.length;
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for (var i = 0; i < numGlyphs; ++i) {
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if (indexToLocFormat) {
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writer.writeUint32(offset);
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} else {
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writer.writeUint16(offset);
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}
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offset += glyfSupport[i].size * sizeRatio;
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}
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// write extra
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if (indexToLocFormat) {
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writer.writeUint32(offset);
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} else {
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writer.writeUint16(offset);
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}
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return writer;
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},
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size: function size(ttf) {
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var locaCount = ttf.glyf.length + 1;
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return ttf.head.indexToLocFormat ? locaCount * 4 : locaCount * 2;
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}
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}); |