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HEADER.js 6.33 KiB
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/*! Fabric.js Copyright 2008-2015, Printio (Juriy Zaytsev, Maxim Chernyak) */
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var fabric = fabric || { version: '5.2.4' };
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if (typeof exports !== 'undefined') {
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  exports.fabric = fabric;
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}
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/* _AMD_START_ */
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else if (typeof define === 'function' && define.amd) {
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  define([], function() { return fabric; });
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}
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/* _AMD_END_ */
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if (typeof document !== 'undefined' && typeof window !== 'undefined') {
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  if (document instanceof (typeof HTMLDocument !== 'undefined' ? HTMLDocument : Document)) {
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    fabric.document = document;
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  }
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  else {
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    fabric.document = document.implementation.createHTMLDocument('');
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  }
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  fabric.window = window;
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}
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else {
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  // assume we're running under node.js when document/window are not present
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  var jsdom = require('jsdom');
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  var virtualWindow = new jsdom.JSDOM(
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    decodeURIComponent('%3C!DOCTYPE%20html%3E%3Chtml%3E%3Chead%3E%3C%2Fhead%3E%3Cbody%3E%3C%2Fbody%3E%3C%2Fhtml%3E'),
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    {
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      features: {
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        FetchExternalResources: ['img']
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      },
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      resources: 'usable'
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    }).window;
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  fabric.document = virtualWindow.document;
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  fabric.jsdomImplForWrapper = require('jsdom/lib/jsdom/living/generated/utils').implForWrapper;
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  fabric.nodeCanvas = require('jsdom/lib/jsdom/utils').Canvas;
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  fabric.window = virtualWindow;
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  DOMParser = fabric.window.DOMParser;
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}
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/**
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 * True when in environment that supports touch events
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 * @type boolean
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 */
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fabric.isTouchSupported = 'ontouchstart' in fabric.window || 'ontouchstart' in fabric.document ||
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  (fabric.window && fabric.window.navigator && fabric.window.navigator.maxTouchPoints > 0);
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/**
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 * True when in environment that's probably Node.js
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 * @type boolean
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 */
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fabric.isLikelyNode = typeof Buffer !== 'undefined' &&
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                      typeof window === 'undefined';
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/* _FROM_SVG_START_ */
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/**
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 * Attributes parsed from all SVG elements
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 * @type array
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 */
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fabric.SHARED_ATTRIBUTES = [
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  'display',
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  'transform',
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  'fill', 'fill-opacity', 'fill-rule',
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  'opacity',
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  'stroke', 'stroke-dasharray', 'stroke-linecap', 'stroke-dashoffset',
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  'stroke-linejoin', 'stroke-miterlimit',
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  'stroke-opacity', 'stroke-width',
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  'id', 'paint-order', 'vector-effect',
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  'instantiated_by_use', 'clip-path',
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];
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/* _FROM_SVG_END_ */
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/** * Pixel per Inch as a default value set to 96. Can be changed for more realistic conversion. */ fabric.DPI = 96; fabric.reNum = '(?:[-+]?(?:\\d+|\\d*\\.\\d+)(?:[eE][-+]?\\d+)?)'; fabric.commaWsp = '(?:\\s+,?\\s*|,\\s*)'; fabric.rePathCommand = /([-+]?((\d+\.\d+)|((\d+)|(\.\d+)))(?:[eE][-+]?\d+)?)/ig; fabric.reNonWord = /[ \n\.,;!\?\-]/; fabric.fontPaths = { }; fabric.iMatrix = [1, 0, 0, 1, 0, 0]; fabric.svgNS = 'http://www.w3.org/2000/svg'; /** * Pixel limit for cache canvases. 1Mpx , 4Mpx should be fine. * @since 1.7.14 * @type Number * @default */ fabric.perfLimitSizeTotal = 2097152; /** * Pixel limit for cache canvases width or height. IE fixes the maximum at 5000 * @since 1.7.14 * @type Number * @default */ fabric.maxCacheSideLimit = 4096; /** * Lowest pixel limit for cache canvases, set at 256PX * @since 1.7.14 * @type Number * @default */ fabric.minCacheSideLimit = 256; /** * Cache Object for widths of chars in text rendering. */ fabric.charWidthsCache = { }; /** * if webgl is enabled and available, textureSize will determine the size * of the canvas backend * @since 2.0.0 * @type Number * @default */ fabric.textureSize = 2048; /** * When 'true', style information is not retained when copy/pasting text, making * pasted text use destination style. * Defaults to 'false'. * @type Boolean * @default */ fabric.disableStyleCopyPaste = false; /** * Enable webgl for filtering picture is available * A filtering backend will be initialized, this will both take memory and * time since a default 2048x2048 canvas will be created for the gl context * @since 2.0.0 * @type Boolean * @default */ fabric.enableGLFiltering = true; /**
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* Device Pixel Ratio * @see https://developer.apple.com/library/safari/documentation/AudioVideo/Conceptual/HTML-canvas-guide/SettingUptheCanvas/SettingUptheCanvas.html */ fabric.devicePixelRatio = fabric.window.devicePixelRatio || fabric.window.webkitDevicePixelRatio || fabric.window.mozDevicePixelRatio || 1; /** * Browser-specific constant to adjust CanvasRenderingContext2D.shadowBlur value, * which is unitless and not rendered equally across browsers. * * Values that work quite well (as of October 2017) are: * - Chrome: 1.5 * - Edge: 1.75 * - Firefox: 0.9 * - Safari: 0.95 * * @since 2.0.0 * @type Number * @default 1 */ fabric.browserShadowBlurConstant = 1; /** * This object contains the result of arc to bezier conversion for faster retrieving if the same arc needs to be converted again. * It was an internal variable, is accessible since version 2.3.4 */ fabric.arcToSegmentsCache = { }; /** * This object keeps the results of the boundsOfCurve calculation mapped by the joined arguments necessary to calculate it. * It does speed up calculation, if you parse and add always the same paths, but in case of heavy usage of freedrawing * you do not get any speed benefit and you get a big object in memory. * The object was a private variable before, while now is appended to the lib so that you have access to it and you * can eventually clear it. * It was an internal variable, is accessible since version 2.3.4 */ fabric.boundsOfCurveCache = { }; /** * If disabled boundsOfCurveCache is not used. For apps that make heavy usage of pencil drawing probably disabling it is better * @default true */ fabric.cachesBoundsOfCurve = true; /** * Skip performance testing of setupGLContext and force the use of putImageData that seems to be the one that works best on * Chrome + old hardware. if your users are experiencing empty images after filtering you may try to force this to true * this has to be set before instantiating the filtering backend ( before filtering the first image ) * @type Boolean * @default false */ fabric.forceGLPutImageData = false; fabric.initFilterBackend = function() { if (fabric.enableGLFiltering && fabric.isWebglSupported && fabric.isWebglSupported(fabric.textureSize)) { console.log('max texture size: ' + fabric.maxTextureSize); return (new fabric.WebglFilterBackend({ tileSize: fabric.textureSize })); } else if (fabric.Canvas2dFilterBackend) { return (new fabric.Canvas2dFilterBackend()); } };