fonteditor-core/lib/graphics/util.js

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

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.ceil = ceil;
exports.ceilPoint = ceilPoint;
exports.getPointHash = getPointHash;
exports.isPointInBound = isPointInBound;
exports.isPointOverlap = isPointOverlap;
/**
 * @file grahpics点相关工具箱
 * @author mengke01(kekee000@gmail.com)
 */

/**
 * 将点进行误差舍入
 *
 * @param {Object} p 点对象
 * @return {Object} 点
 */
function ceilPoint(p) {
  var t = p.x;

  // 处理形如 4.99999 = 5, 5.00001 = 5的情况
  if (Math.abs(Math.round(t) - t) < 0.00002) {
    p.x = Math.round(t);
  } else {
    p.x = Math.round(p.x * 100000) / 100000;
  }
  t = p.y;
  if (Math.abs(Math.round(t) - t) < 0.00005) {
    p.y = Math.round(t);
  } else {
    p.y = Math.round(p.y * 100000) / 100000;
  }
  return p;
}

/**
 * 将数值进行误差舍入
 *
 * @param {Object} x 数值
 * @return {number} 点
 */
function ceil(x) {
  if (Math.abs(Math.round(x) - x) < 0.00002) {
    return Math.round(x);
  }
  return Math.round(x * 100000) / 100000;
}

/**
 * 判断点是否在bounding box内部
 *
 * @param {Object} bound bounding box对象
 * @param {Object} p 点对象
 * @param {boolean=} fixed 是否四舍五入
 * @return {boolean} 是否
 */
function isPointInBound(bound, p, fixed) {
  if (fixed) {
    return ceil(p.x) <= ceil(bound.x + bound.width) && ceil(p.x) >= ceil(bound.x) && ceil(p.y) <= ceil(bound.y + bound.height) && ceil(p.y) >= ceil(bound.y);
  }
  return p.x <= bound.x + bound.width && p.x >= bound.x && p.y <= bound.y + bound.height && p.y >= bound.y;
}

/**
 * 判断点是否重合
 *
 * @param {Object} p0 p0
 * @param {Object} p1 p1
 * @return {boolean} 是否
 */
function isPointOverlap(p0, p1) {
  return ceil(p0.x) === ceil(p1.x) && ceil(p0.y) === ceil(p1.y);
}

/**
 * 获取点的hash值
 *
 * @param {Object} p p
 * @param {Object} p1 p1
 * @return {number}
 */
function getPointHash(p) {
  return Math.floor(7 * Math.floor(p.x * 10) + 131 * Math.floor(p.y * 100));
}