fonteditor-core/lib/ttf/util/transformGlyfContours.js

fonts (ttf, woff, woff2, eot, svg, otf) parse, write, transform, glyph adjust.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = transformGlyfContours;
var _pathCeil = _interopRequireDefault(require("../../graphics/pathCeil"));
var _pathTransform = _interopRequireDefault(require("../../graphics/pathTransform"));
var _lang = require("../../common/lang");
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
/**
 * @file 转换复合字形的contours，以便于显示
 * @author mengke01(kekee000@gmail.com)
 */

/**
 * 转换复合字形轮廓，结果保存在contoursList中，并返回当前glyf的轮廓
 *
 * @param  {Object} glyf glyf对象
 * @param  {Object} ttf ttfObject对象
 * @param  {Object=} contoursList 保存转换中间生成的contours
 * @param  {number} glyfIndex glyf对象当前的index
 * @return {Array} 转换后的轮廓
 */
function transformGlyfContours(glyf, ttf) {
  var contoursList = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : {};
  var glyfIndex = arguments.length > 3 ? arguments[3] : undefined;
  if (!glyf.glyfs) {
    return glyf;
  }
  var compoundContours = [];
  glyf.glyfs.forEach(function (g) {
    var glyph = ttf.glyf[g.glyphIndex];
    if (!glyph || glyph === glyf) {
      return;
    }

    // 递归转换contours
    if (glyph.compound && !contoursList[g.glyphIndex]) {
      transformGlyfContours(glyph, ttf, contoursList, g.glyphIndex);
    }

    // 这里需要进行matrix变换，需要复制一份
    var contours = (0, _lang.clone)(glyph.compound ? contoursList[g.glyphIndex] || [] : glyph.contours);
    var transform = g.transform;
    for (var i = 0, l = contours.length; i < l; i++) {
      (0, _pathTransform.default)(contours[i], transform.a, transform.b, transform.c, transform.d, transform.e, transform.f);
      compoundContours.push((0, _pathCeil.default)(contours[i]));
    }
  });

  // eslint-disable-next-line eqeqeq
  if (null != glyfIndex) {
    contoursList[glyfIndex] = compoundContours;
  }
  return compoundContours;
}