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102 lines
3.0 KiB
Plaintext
102 lines
3.0 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 _parse = _interopRequireDefault(require("./glyf/parse"));
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var _write = _interopRequireDefault(require("./glyf/write"));
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var _sizeof = _interopRequireDefault(require("./glyf/sizeof"));
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var _lang = require("../../common/lang");
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function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
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/**
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* @file glyf表
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* @author mengke01(kekee000@gmail.com)
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*
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* https://developer.apple.com/fonts/TrueType-Reference-Manual/RM06/Chap6glyf.html
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*/
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var _default = exports.default = _table.default.create('glyf', [], {
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read: function read(reader, ttf) {
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var startOffset = this.offset;
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var loca = ttf.loca;
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var numGlyphs = ttf.maxp.numGlyphs;
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var glyphs = [];
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reader.seek(startOffset);
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// subset
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var subset = ttf.readOptions.subset;
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if (subset && subset.length > 0) {
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var subsetMap = {
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0: true // 设置.notdef
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};
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subsetMap[0] = true;
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// subset map
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var cmap = ttf.cmap;
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// unicode to index
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Object.keys(cmap).forEach(function (c) {
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if (subset.indexOf(+c) > -1) {
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var _i = cmap[c];
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subsetMap[_i] = true;
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}
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});
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ttf.subsetMap = subsetMap;
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var parsedGlyfMap = {};
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// 循环解析subset相关的glyf，包括复合字形相关的字形
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var travelsParse = function travels(subsetMap) {
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var newSubsetMap = {};
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Object.keys(subsetMap).forEach(function (i) {
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var index = +i;
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parsedGlyfMap[index] = true;
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// 当前的和下一个一样，或者最后一个无轮廓
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if (loca[index] === loca[index + 1]) {
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glyphs[index] = {
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contours: []
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};
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} else {
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glyphs[index] = (0, _parse.default)(reader, ttf, startOffset + loca[index]);
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}
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if (glyphs[index].compound) {
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glyphs[index].glyfs.forEach(function (g) {
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if (!parsedGlyfMap[g.glyphIndex]) {
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newSubsetMap[g.glyphIndex] = true;
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}
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});
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}
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});
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if (!(0, _lang.isEmptyObject)(newSubsetMap)) {
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travels(newSubsetMap);
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}
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};
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travelsParse(subsetMap);
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return glyphs;
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}
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// 解析字体轮廓, 前n-1个
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var i;
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var l;
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for (i = 0, l = numGlyphs - 1; i < l; i++) {
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// 当前的和下一个一样，或者最后一个无轮廓
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if (loca[i] === loca[i + 1]) {
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glyphs[i] = {
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contours: []
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};
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} else {
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glyphs[i] = (0, _parse.default)(reader, ttf, startOffset + loca[i]);
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}
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}
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// 最后一个轮廓
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if (ttf.tables.glyf.length - loca[i] < 5) {
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glyphs[i] = {
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contours: []
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};
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} else {
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glyphs[i] = (0, _parse.default)(reader, ttf, startOffset + loca[i]);
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}
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return glyphs;
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},
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write: _write.default,
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size: _sizeof.default
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}); |