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@@ -1,1427 +0,0 @@
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-// Copyright 2006 Google Inc.
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-//
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-// Licensed under the Apache License, Version 2.0 (the "License");
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-// you may not use this file except in compliance with the License.
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-// You may obtain a copy of the License at
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-//
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-// http://www.apache.org/licenses/LICENSE-2.0
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-//
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-// Unless required by applicable law or agreed to in writing, software
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-// distributed under the License is distributed on an "AS IS" BASIS,
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-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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-// See the License for the specific language governing permissions and
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-// limitations under the License.
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-
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-
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-// Known Issues:
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-//
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-// * Patterns only support repeat.
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-// * Radial gradient are not implemented. The VML version of these look very
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-// different from the canvas one.
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-// * Clipping paths are not implemented.
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-// * Coordsize. The width and height attribute have higher priority than the
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-// width and height style values which isn't correct.
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-// * Painting mode isn't implemented.
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-// * Canvas width/height should is using content-box by default. IE in
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-// Quirks mode will draw the canvas using border-box. Either change your
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-// doctype to HTML5
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-// (http://www.whatwg.org/specs/web-apps/current-work/#the-doctype)
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-// or use Box Sizing Behavior from WebFX
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-// (http://webfx.eae.net/dhtml/boxsizing/boxsizing.html)
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-// * Non uniform scaling does not correctly scale strokes.
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-// * Filling very large shapes (above 5000 points) is buggy.
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-// * Optimize. There is always room for speed improvements.
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-
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-// Only add this code if we do not already have a canvas implementation
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-if (!document.createElement('canvas').getContext) {
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-
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-(function() {
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-
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- // alias some functions to make (compiled) code shorter
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- var m = Math;
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- var mr = m.round;
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- var ms = m.sin;
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- var mc = m.cos;
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- var abs = m.abs;
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- var sqrt = m.sqrt;
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-
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- // this is used for sub pixel precision
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- var Z = 10;
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- var Z2 = Z / 2;
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-
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- /**
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- * This funtion is assigned to the <canvas> elements as element.getContext().
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- * @this {HTMLElement}
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- * @return {CanvasRenderingContext2D_}
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- */
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- function getContext() {
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- return this.context_ ||
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- (this.context_ = new CanvasRenderingContext2D_(this));
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- }
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-
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- var slice = Array.prototype.slice;
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-
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- /**
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- * Binds a function to an object. The returned function will always use the
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- * passed in {@code obj} as {@code this}.
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- *
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- * Example:
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- *
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- * g = bind(f, obj, a, b)
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- * g(c, d) // will do f.call(obj, a, b, c, d)
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- *
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- * @param {Function} f The function to bind the object to
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- * @param {Object} obj The object that should act as this when the function
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- * is called
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- * @param {*} var_args Rest arguments that will be used as the initial
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- * arguments when the function is called
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- * @return {Function} A new function that has bound this
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- */
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- function bind(f, obj, var_args) {
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- var a = slice.call(arguments, 2);
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- return function() {
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- return f.apply(obj, a.concat(slice.call(arguments)));
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- };
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- }
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-
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- function encodeHtmlAttribute(s) {
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- return String(s).replace(/&/g, '&').replace(/"/g, '"');
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- }
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-
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- function addNamespacesAndStylesheet(doc) {
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- // create xmlns
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- if (!doc.namespaces['g_vml_']) {
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- doc.namespaces.add('g_vml_', 'urn:schemas-microsoft-com:vml',
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- '#default#VML');
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-
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- }
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- if (!doc.namespaces['g_o_']) {
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- doc.namespaces.add('g_o_', 'urn:schemas-microsoft-com:office:office',
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- '#default#VML');
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- }
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-
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- // Setup default CSS. Only add one style sheet per document
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- if (!doc.styleSheets['ex_canvas_']) {
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- var ss = doc.createStyleSheet();
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- ss.owningElement.id = 'ex_canvas_';
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- ss.cssText = 'canvas{display:inline-block;overflow:hidden;' +
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- // default size is 300x150 in Gecko and Opera
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- 'text-align:left;width:300px;height:150px}';
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- }
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- }
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-
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- // Add namespaces and stylesheet at startup.
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- addNamespacesAndStylesheet(document);
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-
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- var G_vmlCanvasManager_ = {
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- init: function(opt_doc) {
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- if (/MSIE/.test(navigator.userAgent) && !window.opera) {
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- var doc = opt_doc || document;
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- // Create a dummy element so that IE will allow canvas elements to be
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- // recognized.
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- doc.createElement('canvas');
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- doc.attachEvent('onreadystatechange', bind(this.init_, this, doc));
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- }
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- },
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-
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- init_: function(doc) {
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- // find all canvas elements
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- var els = doc.getElementsByTagName('canvas');
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- for (var i = 0; i < els.length; i++) {
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- this.initElement(els[i]);
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- }
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- },
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-
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- /**
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- * Public initializes a canvas element so that it can be used as canvas
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- * element from now on. This is called automatically before the page is
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- * loaded but if you are creating elements using createElement you need to
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- * make sure this is called on the element.
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- * @param {HTMLElement} el The canvas element to initialize.
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- * @return {HTMLElement} the element that was created.
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- */
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- initElement: function(el) {
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- if (!el.getContext) {
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- el.getContext = getContext;
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-
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- // Add namespaces and stylesheet to document of the element.
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- addNamespacesAndStylesheet(el.ownerDocument);
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-
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- // Remove fallback content. There is no way to hide text nodes so we
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- // just remove all childNodes. We could hide all elements and remove
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- // text nodes but who really cares about the fallback content.
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- el.innerHTML = '';
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-
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- // do not use inline function because that will leak memory
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- el.attachEvent('onpropertychange', onPropertyChange);
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- el.attachEvent('onresize', onResize);
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-
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- var attrs = el.attributes;
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- if (attrs.width && attrs.width.specified) {
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- // TODO: use runtimeStyle and coordsize
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- // el.getContext().setWidth_(attrs.width.nodeValue);
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- el.style.width = attrs.width.nodeValue + 'px';
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- } else {
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- el.width = el.clientWidth;
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- }
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- if (attrs.height && attrs.height.specified) {
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- // TODO: use runtimeStyle and coordsize
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- // el.getContext().setHeight_(attrs.height.nodeValue);
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- el.style.height = attrs.height.nodeValue + 'px';
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- } else {
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- el.height = el.clientHeight;
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- }
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- //el.getContext().setCoordsize_()
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- }
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- return el;
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- }
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- };
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-
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- function onPropertyChange(e) {
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- var el = e.srcElement;
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-
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- switch (e.propertyName) {
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- case 'width':
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- el.getContext().clearRect();
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- el.style.width = el.attributes.width.nodeValue + 'px';
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- // In IE8 this does not trigger onresize.
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- el.firstChild.style.width = el.clientWidth + 'px';
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- break;
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- case 'height':
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- el.getContext().clearRect();
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- el.style.height = el.attributes.height.nodeValue + 'px';
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- el.firstChild.style.height = el.clientHeight + 'px';
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- break;
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- }
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- }
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-
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- function onResize(e) {
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- var el = e.srcElement;
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- if (el.firstChild) {
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- el.firstChild.style.width = el.clientWidth + 'px';
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- el.firstChild.style.height = el.clientHeight + 'px';
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- }
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- }
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-
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- G_vmlCanvasManager_.init();
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-
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- // precompute "00" to "FF"
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- var decToHex = [];
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- for (var i = 0; i < 16; i++) {
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- for (var j = 0; j < 16; j++) {
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- decToHex[i * 16 + j] = i.toString(16) + j.toString(16);
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- }
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- }
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-
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- function createMatrixIdentity() {
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- return [
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- [1, 0, 0],
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- [0, 1, 0],
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- [0, 0, 1]
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- ];
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- }
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-
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- function matrixMultiply(m1, m2) {
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- var result = createMatrixIdentity();
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-
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- for (var x = 0; x < 3; x++) {
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- for (var y = 0; y < 3; y++) {
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- var sum = 0;
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-
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- for (var z = 0; z < 3; z++) {
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- sum += m1[x][z] * m2[z][y];
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- }
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-
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- result[x][y] = sum;
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- }
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- }
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- return result;
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- }
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-
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- function copyState(o1, o2) {
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- o2.fillStyle = o1.fillStyle;
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- o2.lineCap = o1.lineCap;
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- o2.lineJoin = o1.lineJoin;
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- o2.lineWidth = o1.lineWidth;
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- o2.miterLimit = o1.miterLimit;
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- o2.shadowBlur = o1.shadowBlur;
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- o2.shadowColor = o1.shadowColor;
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- o2.shadowOffsetX = o1.shadowOffsetX;
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- o2.shadowOffsetY = o1.shadowOffsetY;
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- o2.strokeStyle = o1.strokeStyle;
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- o2.globalAlpha = o1.globalAlpha;
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- o2.font = o1.font;
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- o2.textAlign = o1.textAlign;
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- o2.textBaseline = o1.textBaseline;
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- o2.arcScaleX_ = o1.arcScaleX_;
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- o2.arcScaleY_ = o1.arcScaleY_;
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- o2.lineScale_ = o1.lineScale_;
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- }
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-
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- var colorData = {
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- aliceblue: '#F0F8FF',
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- antiquewhite: '#FAEBD7',
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- aquamarine: '#7FFFD4',
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- azure: '#F0FFFF',
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- beige: '#F5F5DC',
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- bisque: '#FFE4C4',
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- black: '#000000',
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- blanchedalmond: '#FFEBCD',
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- blueviolet: '#8A2BE2',
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- brown: '#A52A2A',
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- burlywood: '#DEB887',
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- cadetblue: '#5F9EA0',
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- chartreuse: '#7FFF00',
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- chocolate: '#D2691E',
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- coral: '#FF7F50',
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- cornflowerblue: '#6495ED',
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- cornsilk: '#FFF8DC',
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- crimson: '#DC143C',
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- cyan: '#00FFFF',
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- darkblue: '#00008B',
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- darkcyan: '#008B8B',
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- darkgoldenrod: '#B8860B',
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- darkgray: '#A9A9A9',
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- darkgreen: '#006400',
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- darkgrey: '#A9A9A9',
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- darkkhaki: '#BDB76B',
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- darkmagenta: '#8B008B',
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- darkolivegreen: '#556B2F',
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- darkorange: '#FF8C00',
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- darkorchid: '#9932CC',
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- darkred: '#8B0000',
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- darksalmon: '#E9967A',
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- darkseagreen: '#8FBC8F',
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- darkslateblue: '#483D8B',
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- darkslategray: '#2F4F4F',
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- darkslategrey: '#2F4F4F',
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- darkturquoise: '#00CED1',
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- darkviolet: '#9400D3',
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- deeppink: '#FF1493',
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- deepskyblue: '#00BFFF',
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- dimgray: '#696969',
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- dimgrey: '#696969',
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- dodgerblue: '#1E90FF',
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- firebrick: '#B22222',
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- floralwhite: '#FFFAF0',
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- forestgreen: '#228B22',
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- gainsboro: '#DCDCDC',
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- ghostwhite: '#F8F8FF',
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- gold: '#FFD700',
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- goldenrod: '#DAA520',
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- grey: '#808080',
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- greenyellow: '#ADFF2F',
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- honeydew: '#F0FFF0',
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- hotpink: '#FF69B4',
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- indianred: '#CD5C5C',
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- indigo: '#4B0082',
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- ivory: '#FFFFF0',
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- khaki: '#F0E68C',
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- lavender: '#E6E6FA',
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- lavenderblush: '#FFF0F5',
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- lawngreen: '#7CFC00',
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- lemonchiffon: '#FFFACD',
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- lightblue: '#ADD8E6',
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- lightcoral: '#F08080',
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- lightcyan: '#E0FFFF',
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- lightgoldenrodyellow: '#FAFAD2',
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- lightgreen: '#90EE90',
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- lightgrey: '#D3D3D3',
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- lightpink: '#FFB6C1',
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- lightsalmon: '#FFA07A',
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- lightseagreen: '#20B2AA',
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- lightskyblue: '#87CEFA',
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- lightslategray: '#778899',
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- lightslategrey: '#778899',
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- lightsteelblue: '#B0C4DE',
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- lightyellow: '#FFFFE0',
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- limegreen: '#32CD32',
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- linen: '#FAF0E6',
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- magenta: '#FF00FF',
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- mediumaquamarine: '#66CDAA',
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- mediumblue: '#0000CD',
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- mediumorchid: '#BA55D3',
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- mediumpurple: '#9370DB',
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- mediumseagreen: '#3CB371',
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- mediumslateblue: '#7B68EE',
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- mediumspringgreen: '#00FA9A',
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- mediumturquoise: '#48D1CC',
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- mediumvioletred: '#C71585',
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- midnightblue: '#191970',
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- mintcream: '#F5FFFA',
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- mistyrose: '#FFE4E1',
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- moccasin: '#FFE4B5',
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- navajowhite: '#FFDEAD',
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- oldlace: '#FDF5E6',
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- olivedrab: '#6B8E23',
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- orange: '#FFA500',
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- orangered: '#FF4500',
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- orchid: '#DA70D6',
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- palegoldenrod: '#EEE8AA',
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- palegreen: '#98FB98',
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- paleturquoise: '#AFEEEE',
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- palevioletred: '#DB7093',
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- papayawhip: '#FFEFD5',
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- peachpuff: '#FFDAB9',
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- peru: '#CD853F',
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- pink: '#FFC0CB',
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- plum: '#DDA0DD',
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- powderblue: '#B0E0E6',
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- rosybrown: '#BC8F8F',
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- royalblue: '#4169E1',
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- saddlebrown: '#8B4513',
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- salmon: '#FA8072',
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- sandybrown: '#F4A460',
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- seagreen: '#2E8B57',
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- seashell: '#FFF5EE',
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- sienna: '#A0522D',
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- skyblue: '#87CEEB',
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- slateblue: '#6A5ACD',
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- slategray: '#708090',
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- slategrey: '#708090',
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- snow: '#FFFAFA',
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- springgreen: '#00FF7F',
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- steelblue: '#4682B4',
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- tan: '#D2B48C',
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- thistle: '#D8BFD8',
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- tomato: '#FF6347',
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- turquoise: '#40E0D0',
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- violet: '#EE82EE',
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- wheat: '#F5DEB3',
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- whitesmoke: '#F5F5F5',
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- yellowgreen: '#9ACD32'
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- };
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-
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-
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- function getRgbHslContent(styleString) {
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|
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- var start = styleString.indexOf('(', 3);
|
|
|
- var end = styleString.indexOf(')', start + 1);
|
|
|
- var parts = styleString.substring(start + 1, end).split(',');
|
|
|
- // add alpha if needed
|
|
|
- if (parts.length == 4 && styleString.substr(3, 1) == 'a') {
|
|
|
- alpha = Number(parts[3]);
|
|
|
- } else {
|
|
|
- parts[3] = 1;
|
|
|
- }
|
|
|
- return parts;
|
|
|
- }
|
|
|
-
|
|
|
- function percent(s) {
|
|
|
- return parseFloat(s) / 100;
|
|
|
- }
|
|
|
-
|
|
|
- function clamp(v, min, max) {
|
|
|
- return Math.min(max, Math.max(min, v));
|
|
|
- }
|
|
|
-
|
|
|
- function hslToRgb(parts){
|
|
|
- var r, g, b;
|
|
|
- h = parseFloat(parts[0]) / 360 % 360;
|
|
|
- if (h < 0)
|
|
|
- h++;
|
|
|
- s = clamp(percent(parts[1]), 0, 1);
|
|
|
- l = clamp(percent(parts[2]), 0, 1);
|
|
|
- if (s == 0) {
|
|
|
- r = g = b = l; // achromatic
|
|
|
- } else {
|
|
|
- var q = l < 0.5 ? l * (1 + s) : l + s - l * s;
|
|
|
- var p = 2 * l - q;
|
|
|
- r = hueToRgb(p, q, h + 1 / 3);
|
|
|
- g = hueToRgb(p, q, h);
|
|
|
- b = hueToRgb(p, q, h - 1 / 3);
|
|
|
- }
|
|
|
-
|
|
|
- return '#' + decToHex[Math.floor(r * 255)] +
|
|
|
- decToHex[Math.floor(g * 255)] +
|
|
|
- decToHex[Math.floor(b * 255)];
|
|
|
- }
|
|
|
-
|
|
|
- function hueToRgb(m1, m2, h) {
|
|
|
- if (h < 0)
|
|
|
- h++;
|
|
|
- if (h > 1)
|
|
|
- h--;
|
|
|
-
|
|
|
- if (6 * h < 1)
|
|
|
- return m1 + (m2 - m1) * 6 * h;
|
|
|
- else if (2 * h < 1)
|
|
|
- return m2;
|
|
|
- else if (3 * h < 2)
|
|
|
- return m1 + (m2 - m1) * (2 / 3 - h) * 6;
|
|
|
- else
|
|
|
- return m1;
|
|
|
- }
|
|
|
-
|
|
|
- function processStyle(styleString) {
|
|
|
- var str, alpha = 1;
|
|
|
-
|
|
|
- styleString = String(styleString);
|
|
|
- if (styleString.charAt(0) == '#') {
|
|
|
- str = styleString;
|
|
|
- } else if (/^rgb/.test(styleString)) {
|
|
|
- var parts = getRgbHslContent(styleString);
|
|
|
- var str = '#', n;
|
|
|
- for (var i = 0; i < 3; i++) {
|
|
|
- if (parts[i].indexOf('%') != -1) {
|
|
|
- n = Math.floor(percent(parts[i]) * 255);
|
|
|
- } else {
|
|
|
- n = Number(parts[i]);
|
|
|
- }
|
|
|
- str += decToHex[clamp(n, 0, 255)];
|
|
|
- }
|
|
|
- alpha = parts[3];
|
|
|
- } else if (/^hsl/.test(styleString)) {
|
|
|
- var parts = getRgbHslContent(styleString);
|
|
|
- str = hslToRgb(parts);
|
|
|
- alpha = parts[3];
|
|
|
- } else {
|
|
|
- str = colorData[styleString] || styleString;
|
|
|
- }
|
|
|
- return {color: str, alpha: alpha};
|
|
|
- }
|
|
|
-
|
|
|
- var DEFAULT_STYLE = {
|
|
|
- style: 'normal',
|
|
|
- variant: 'normal',
|
|
|
- weight: 'normal',
|
|
|
- size: 10,
|
|
|
- family: 'sans-serif'
|
|
|
- };
|
|
|
-
|
|
|
- // Internal text style cache
|
|
|
- var fontStyleCache = {};
|
|
|
-
|
|
|
- function processFontStyle(styleString) {
|
|
|
- if (fontStyleCache[styleString]) {
|
|
|
- return fontStyleCache[styleString];
|
|
|
- }
|
|
|
-
|
|
|
- var el = document.createElement('div');
|
|
|
- var style = el.style;
|
|
|
- try {
|
|
|
- style.font = styleString;
|
|
|
- } catch (ex) {
|
|
|
- // Ignore failures to set to invalid font.
|
|
|
- }
|
|
|
-
|
|
|
- return fontStyleCache[styleString] = {
|
|
|
- style: style.fontStyle || DEFAULT_STYLE.style,
|
|
|
- variant: style.fontVariant || DEFAULT_STYLE.variant,
|
|
|
- weight: style.fontWeight || DEFAULT_STYLE.weight,
|
|
|
- size: style.fontSize || DEFAULT_STYLE.size,
|
|
|
- family: style.fontFamily || DEFAULT_STYLE.family
|
|
|
- };
|
|
|
- }
|
|
|
-
|
|
|
- function getComputedStyle(style, element) {
|
|
|
- var computedStyle = {};
|
|
|
-
|
|
|
- for (var p in style) {
|
|
|
- computedStyle[p] = style[p];
|
|
|
- }
|
|
|
-
|
|
|
- // Compute the size
|
|
|
- var canvasFontSize = parseFloat(element.currentStyle.fontSize),
|
|
|
- fontSize = parseFloat(style.size);
|
|
|
-
|
|
|
- if (typeof style.size == 'number') {
|
|
|
- computedStyle.size = style.size;
|
|
|
- } else if (style.size.indexOf('px') != -1) {
|
|
|
- computedStyle.size = fontSize;
|
|
|
- } else if (style.size.indexOf('em') != -1) {
|
|
|
- computedStyle.size = canvasFontSize * fontSize;
|
|
|
- } else if(style.size.indexOf('%') != -1) {
|
|
|
- computedStyle.size = (canvasFontSize / 100) * fontSize;
|
|
|
- } else if (style.size.indexOf('pt') != -1) {
|
|
|
- computedStyle.size = fontSize / .75;
|
|
|
- } else {
|
|
|
- computedStyle.size = canvasFontSize;
|
|
|
- }
|
|
|
-
|
|
|
- // Different scaling between normal text and VML text. This was found using
|
|
|
- // trial and error to get the same size as non VML text.
|
|
|
- computedStyle.size *= 0.981;
|
|
|
-
|
|
|
- return computedStyle;
|
|
|
- }
|
|
|
-
|
|
|
- function buildStyle(style) {
|
|
|
- return style.style + ' ' + style.variant + ' ' + style.weight + ' ' +
|
|
|
- style.size + 'px ' + style.family;
|
|
|
- }
|
|
|
-
|
|
|
- function processLineCap(lineCap) {
|
|
|
- switch (lineCap) {
|
|
|
- case 'butt':
|
|
|
- return 'flat';
|
|
|
- case 'round':
|
|
|
- return 'round';
|
|
|
- case 'square':
|
|
|
- default:
|
|
|
- return 'square';
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- /**
|
|
|
- * This class implements CanvasRenderingContext2D interface as described by
|
|
|
- * the WHATWG.
|
|
|
- * @param {HTMLElement} surfaceElement The element that the 2D context should
|
|
|
- * be associated with
|
|
|
- */
|
|
|
- function CanvasRenderingContext2D_(surfaceElement) {
|
|
|
- this.m_ = createMatrixIdentity();
|
|
|
-
|
|
|
- this.mStack_ = [];
|
|
|
- this.aStack_ = [];
|
|
|
- this.currentPath_ = [];
|
|
|
-
|
|
|
- // Canvas context properties
|
|
|
- this.strokeStyle = '#000';
|
|
|
- this.fillStyle = '#000';
|
|
|
-
|
|
|
- this.lineWidth = 1;
|
|
|
- this.lineJoin = 'miter';
|
|
|
- this.lineCap = 'butt';
|
|
|
- this.miterLimit = Z * 1;
|
|
|
- this.globalAlpha = 1;
|
|
|
- this.font = '10px sans-serif';
|
|
|
- this.textAlign = 'left';
|
|
|
- this.textBaseline = 'alphabetic';
|
|
|
- this.canvas = surfaceElement;
|
|
|
-
|
|
|
- var el = surfaceElement.ownerDocument.createElement('div');
|
|
|
- el.style.width = surfaceElement.clientWidth + 'px';
|
|
|
- el.style.height = surfaceElement.clientHeight + 'px';
|
|
|
- el.style.overflow = 'hidden';
|
|
|
- el.style.position = 'absolute';
|
|
|
- surfaceElement.appendChild(el);
|
|
|
-
|
|
|
- this.element_ = el;
|
|
|
- this.arcScaleX_ = 1;
|
|
|
- this.arcScaleY_ = 1;
|
|
|
- this.lineScale_ = 1;
|
|
|
- }
|
|
|
-
|
|
|
- var contextPrototype = CanvasRenderingContext2D_.prototype;
|
|
|
- contextPrototype.clearRect = function() {
|
|
|
- if (this.textMeasureEl_) {
|
|
|
- this.textMeasureEl_.removeNode(true);
|
|
|
- this.textMeasureEl_ = null;
|
|
|
- }
|
|
|
- this.element_.innerHTML = '';
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.beginPath = function() {
|
|
|
- // TODO: Branch current matrix so that save/restore has no effect
|
|
|
- // as per safari docs.
|
|
|
- this.currentPath_ = [];
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.moveTo = function(aX, aY) {
|
|
|
- var p = this.getCoords_(aX, aY);
|
|
|
- this.currentPath_.push({type: 'moveTo', x: p.x, y: p.y});
|
|
|
- this.currentX_ = p.x;
|
|
|
- this.currentY_ = p.y;
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.lineTo = function(aX, aY) {
|
|
|
- var p = this.getCoords_(aX, aY);
|
|
|
- this.currentPath_.push({type: 'lineTo', x: p.x, y: p.y});
|
|
|
-
|
|
|
- this.currentX_ = p.x;
|
|
|
- this.currentY_ = p.y;
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.bezierCurveTo = function(aCP1x, aCP1y,
|
|
|
- aCP2x, aCP2y,
|
|
|
- aX, aY) {
|
|
|
- var p = this.getCoords_(aX, aY);
|
|
|
- var cp1 = this.getCoords_(aCP1x, aCP1y);
|
|
|
- var cp2 = this.getCoords_(aCP2x, aCP2y);
|
|
|
- bezierCurveTo(this, cp1, cp2, p);
|
|
|
- };
|
|
|
-
|
|
|
- // Helper function that takes the already fixed cordinates.
|
|
|
- function bezierCurveTo(self, cp1, cp2, p) {
|
|
|
- self.currentPath_.push({
|
|
|
- type: 'bezierCurveTo',
|
|
|
- cp1x: cp1.x,
|
|
|
- cp1y: cp1.y,
|
|
|
- cp2x: cp2.x,
|
|
|
- cp2y: cp2.y,
|
|
|
- x: p.x,
|
|
|
- y: p.y
|
|
|
- });
|
|
|
- self.currentX_ = p.x;
|
|
|
- self.currentY_ = p.y;
|
|
|
- }
|
|
|
-
|
|
|
- contextPrototype.quadraticCurveTo = function(aCPx, aCPy, aX, aY) {
|
|
|
- // the following is lifted almost directly from
|
|
|
- // http://developer.mozilla.org/en/docs/Canvas_tutorial:Drawing_shapes
|
|
|
-
|
|
|
- var cp = this.getCoords_(aCPx, aCPy);
|
|
|
- var p = this.getCoords_(aX, aY);
|
|
|
-
|
|
|
- var cp1 = {
|
|
|
- x: this.currentX_ + 2.0 / 3.0 * (cp.x - this.currentX_),
|
|
|
- y: this.currentY_ + 2.0 / 3.0 * (cp.y - this.currentY_)
|
|
|
- };
|
|
|
- var cp2 = {
|
|
|
- x: cp1.x + (p.x - this.currentX_) / 3.0,
|
|
|
- y: cp1.y + (p.y - this.currentY_) / 3.0
|
|
|
- };
|
|
|
-
|
|
|
- bezierCurveTo(this, cp1, cp2, p);
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.arc = function(aX, aY, aRadius,
|
|
|
- aStartAngle, aEndAngle, aClockwise) {
|
|
|
- aRadius *= Z;
|
|
|
- var arcType = aClockwise ? 'at' : 'wa';
|
|
|
-
|
|
|
- var xStart = aX + mc(aStartAngle) * aRadius - Z2;
|
|
|
- var yStart = aY + ms(aStartAngle) * aRadius - Z2;
|
|
|
-
|
|
|
- var xEnd = aX + mc(aEndAngle) * aRadius - Z2;
|
|
|
- var yEnd = aY + ms(aEndAngle) * aRadius - Z2;
|
|
|
-
|
|
|
- // IE won't render arches drawn counter clockwise if xStart == xEnd.
|
|
|
- if (xStart == xEnd && !aClockwise) {
|
|
|
- xStart += 0.125; // Offset xStart by 1/80 of a pixel. Use something
|
|
|
- // that can be represented in binary
|
|
|
- }
|
|
|
-
|
|
|
- var p = this.getCoords_(aX, aY);
|
|
|
- var pStart = this.getCoords_(xStart, yStart);
|
|
|
- var pEnd = this.getCoords_(xEnd, yEnd);
|
|
|
-
|
|
|
- this.currentPath_.push({type: arcType,
|
|
|
- x: p.x,
|
|
|
- y: p.y,
|
|
|
- radius: aRadius,
|
|
|
- xStart: pStart.x,
|
|
|
- yStart: pStart.y,
|
|
|
- xEnd: pEnd.x,
|
|
|
- yEnd: pEnd.y});
|
|
|
-
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.rect = function(aX, aY, aWidth, aHeight) {
|
|
|
- this.moveTo(aX, aY);
|
|
|
- this.lineTo(aX + aWidth, aY);
|
|
|
- this.lineTo(aX + aWidth, aY + aHeight);
|
|
|
- this.lineTo(aX, aY + aHeight);
|
|
|
- this.closePath();
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.strokeRect = function(aX, aY, aWidth, aHeight) {
|
|
|
- var oldPath = this.currentPath_;
|
|
|
- this.beginPath();
|
|
|
-
|
|
|
- this.moveTo(aX, aY);
|
|
|
- this.lineTo(aX + aWidth, aY);
|
|
|
- this.lineTo(aX + aWidth, aY + aHeight);
|
|
|
- this.lineTo(aX, aY + aHeight);
|
|
|
- this.closePath();
|
|
|
- this.stroke();
|
|
|
-
|
|
|
- this.currentPath_ = oldPath;
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.fillRect = function(aX, aY, aWidth, aHeight) {
|
|
|
- var oldPath = this.currentPath_;
|
|
|
- this.beginPath();
|
|
|
-
|
|
|
- this.moveTo(aX, aY);
|
|
|
- this.lineTo(aX + aWidth, aY);
|
|
|
- this.lineTo(aX + aWidth, aY + aHeight);
|
|
|
- this.lineTo(aX, aY + aHeight);
|
|
|
- this.closePath();
|
|
|
- this.fill();
|
|
|
-
|
|
|
- this.currentPath_ = oldPath;
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.createLinearGradient = function(aX0, aY0, aX1, aY1) {
|
|
|
- var gradient = new CanvasGradient_('gradient');
|
|
|
- gradient.x0_ = aX0;
|
|
|
- gradient.y0_ = aY0;
|
|
|
- gradient.x1_ = aX1;
|
|
|
- gradient.y1_ = aY1;
|
|
|
- return gradient;
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.createRadialGradient = function(aX0, aY0, aR0,
|
|
|
- aX1, aY1, aR1) {
|
|
|
- var gradient = new CanvasGradient_('gradientradial');
|
|
|
- gradient.x0_ = aX0;
|
|
|
- gradient.y0_ = aY0;
|
|
|
- gradient.r0_ = aR0;
|
|
|
- gradient.x1_ = aX1;
|
|
|
- gradient.y1_ = aY1;
|
|
|
- gradient.r1_ = aR1;
|
|
|
- return gradient;
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.drawImage = function(image, var_args) {
|
|
|
- var dx, dy, dw, dh, sx, sy, sw, sh;
|
|
|
-
|
|
|
- // to find the original width we overide the width and height
|
|
|
- var oldRuntimeWidth = image.runtimeStyle.width;
|
|
|
- var oldRuntimeHeight = image.runtimeStyle.height;
|
|
|
- image.runtimeStyle.width = 'auto';
|
|
|
- image.runtimeStyle.height = 'auto';
|
|
|
-
|
|
|
- // get the original size
|
|
|
- var w = image.width;
|
|
|
- var h = image.height;
|
|
|
-
|
|
|
- // and remove overides
|
|
|
- image.runtimeStyle.width = oldRuntimeWidth;
|
|
|
- image.runtimeStyle.height = oldRuntimeHeight;
|
|
|
-
|
|
|
- if (arguments.length == 3) {
|
|
|
- dx = arguments[1];
|
|
|
- dy = arguments[2];
|
|
|
- sx = sy = 0;
|
|
|
- sw = dw = w;
|
|
|
- sh = dh = h;
|
|
|
- } else if (arguments.length == 5) {
|
|
|
- dx = arguments[1];
|
|
|
- dy = arguments[2];
|
|
|
- dw = arguments[3];
|
|
|
- dh = arguments[4];
|
|
|
- sx = sy = 0;
|
|
|
- sw = w;
|
|
|
- sh = h;
|
|
|
- } else if (arguments.length == 9) {
|
|
|
- sx = arguments[1];
|
|
|
- sy = arguments[2];
|
|
|
- sw = arguments[3];
|
|
|
- sh = arguments[4];
|
|
|
- dx = arguments[5];
|
|
|
- dy = arguments[6];
|
|
|
- dw = arguments[7];
|
|
|
- dh = arguments[8];
|
|
|
- } else {
|
|
|
- throw Error('Invalid number of arguments');
|
|
|
- }
|
|
|
-
|
|
|
- var d = this.getCoords_(dx, dy);
|
|
|
-
|
|
|
- var w2 = sw / 2;
|
|
|
- var h2 = sh / 2;
|
|
|
-
|
|
|
- var vmlStr = [];
|
|
|
-
|
|
|
- var W = 10;
|
|
|
- var H = 10;
|
|
|
-
|
|
|
- // For some reason that I've now forgotten, using divs didn't work
|
|
|
- vmlStr.push(' <g_vml_:group',
|
|
|
- ' coordsize="', Z * W, ',', Z * H, '"',
|
|
|
- ' coordorigin="0,0"' ,
|
|
|
- ' style="width:', W, 'px;height:', H, 'px;position:absolute;');
|
|
|
-
|
|
|
- // If filters are necessary (rotation exists), create them
|
|
|
- // filters are bog-slow, so only create them if abbsolutely necessary
|
|
|
- // The following check doesn't account for skews (which don't exist
|
|
|
- // in the canvas spec (yet) anyway.
|
|
|
-
|
|
|
- if (this.m_[0][0] != 1 || this.m_[0][1] ||
|
|
|
- this.m_[1][1] != 1 || this.m_[1][0]) {
|
|
|
- var filter = [];
|
|
|
-
|
|
|
- // Note the 12/21 reversal
|
|
|
- filter.push('M11=', this.m_[0][0], ',',
|
|
|
- 'M12=', this.m_[1][0], ',',
|
|
|
- 'M21=', this.m_[0][1], ',',
|
|
|
- 'M22=', this.m_[1][1], ',',
|
|
|
- 'Dx=', mr(d.x / Z), ',',
|
|
|
- 'Dy=', mr(d.y / Z), '');
|
|
|
-
|
|
|
- // Bounding box calculation (need to minimize displayed area so that
|
|
|
- // filters don't waste time on unused pixels.
|
|
|
- var max = d;
|
|
|
- var c2 = this.getCoords_(dx + dw, dy);
|
|
|
- var c3 = this.getCoords_(dx, dy + dh);
|
|
|
- var c4 = this.getCoords_(dx + dw, dy + dh);
|
|
|
-
|
|
|
- max.x = m.max(max.x, c2.x, c3.x, c4.x);
|
|
|
- max.y = m.max(max.y, c2.y, c3.y, c4.y);
|
|
|
-
|
|
|
- vmlStr.push('padding:0 ', mr(max.x / Z), 'px ', mr(max.y / Z),
|
|
|
- 'px 0;filter:progid:DXImageTransform.Microsoft.Matrix(',
|
|
|
- filter.join(''), ", sizingmethod='clip');");
|
|
|
-
|
|
|
- } else {
|
|
|
- vmlStr.push('top:', mr(d.y / Z), 'px;left:', mr(d.x / Z), 'px;');
|
|
|
- }
|
|
|
-
|
|
|
- vmlStr.push(' ">' ,
|
|
|
- '<g_vml_:image src="', image.src, '"',
|
|
|
- ' style="width:', Z * dw, 'px;',
|
|
|
- ' height:', Z * dh, 'px"',
|
|
|
- ' cropleft="', sx / w, '"',
|
|
|
- ' croptop="', sy / h, '"',
|
|
|
- ' cropright="', (w - sx - sw) / w, '"',
|
|
|
- ' cropbottom="', (h - sy - sh) / h, '"',
|
|
|
- ' />',
|
|
|
- '</g_vml_:group>');
|
|
|
-
|
|
|
- this.element_.insertAdjacentHTML('BeforeEnd', vmlStr.join(''));
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.stroke = function(aFill) {
|
|
|
- var W = 10;
|
|
|
- var H = 10;
|
|
|
- // Divide the shape into chunks if it's too long because IE has a limit
|
|
|
- // somewhere for how long a VML shape can be. This simple division does
|
|
|
- // not work with fills, only strokes, unfortunately.
|
|
|
- var chunkSize = 5000;
|
|
|
-
|
|
|
- var min = {x: null, y: null};
|
|
|
- var max = {x: null, y: null};
|
|
|
-
|
|
|
- for (var j = 0; j < this.currentPath_.length; j += chunkSize) {
|
|
|
- var lineStr = [];
|
|
|
- var lineOpen = false;
|
|
|
-
|
|
|
- lineStr.push('<g_vml_:shape',
|
|
|
- ' filled="', !!aFill, '"',
|
|
|
- ' style="position:absolute;width:', W, 'px;height:', H, 'px;"',
|
|
|
- ' coordorigin="0,0"',
|
|
|
- ' coordsize="', Z * W, ',', Z * H, '"',
|
|
|
- ' stroked="', !aFill, '"',
|
|
|
- ' path="');
|
|
|
-
|
|
|
- var newSeq = false;
|
|
|
-
|
|
|
- for (var i = j; i < Math.min(j + chunkSize, this.currentPath_.length); i++) {
|
|
|
- if (i % chunkSize == 0 && i > 0) { // move into position for next chunk
|
|
|
- lineStr.push(' m ', mr(this.currentPath_[i-1].x), ',', mr(this.currentPath_[i-1].y));
|
|
|
- }
|
|
|
-
|
|
|
- var p = this.currentPath_[i];
|
|
|
- var c;
|
|
|
-
|
|
|
- switch (p.type) {
|
|
|
- case 'moveTo':
|
|
|
- c = p;
|
|
|
- lineStr.push(' m ', mr(p.x), ',', mr(p.y));
|
|
|
- break;
|
|
|
- case 'lineTo':
|
|
|
- lineStr.push(' l ', mr(p.x), ',', mr(p.y));
|
|
|
- break;
|
|
|
- case 'close':
|
|
|
- lineStr.push(' x ');
|
|
|
- p = null;
|
|
|
- break;
|
|
|
- case 'bezierCurveTo':
|
|
|
- lineStr.push(' c ',
|
|
|
- mr(p.cp1x), ',', mr(p.cp1y), ',',
|
|
|
- mr(p.cp2x), ',', mr(p.cp2y), ',',
|
|
|
- mr(p.x), ',', mr(p.y));
|
|
|
- break;
|
|
|
- case 'at':
|
|
|
- case 'wa':
|
|
|
- lineStr.push(' ', p.type, ' ',
|
|
|
- mr(p.x - this.arcScaleX_ * p.radius), ',',
|
|
|
- mr(p.y - this.arcScaleY_ * p.radius), ' ',
|
|
|
- mr(p.x + this.arcScaleX_ * p.radius), ',',
|
|
|
- mr(p.y + this.arcScaleY_ * p.radius), ' ',
|
|
|
- mr(p.xStart), ',', mr(p.yStart), ' ',
|
|
|
- mr(p.xEnd), ',', mr(p.yEnd));
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
-
|
|
|
- // TODO: Following is broken for curves due to
|
|
|
- // move to proper paths.
|
|
|
-
|
|
|
- // Figure out dimensions so we can do gradient fills
|
|
|
- // properly
|
|
|
- if (p) {
|
|
|
- if (min.x == null || p.x < min.x) {
|
|
|
- min.x = p.x;
|
|
|
- }
|
|
|
- if (max.x == null || p.x > max.x) {
|
|
|
- max.x = p.x;
|
|
|
- }
|
|
|
- if (min.y == null || p.y < min.y) {
|
|
|
- min.y = p.y;
|
|
|
- }
|
|
|
- if (max.y == null || p.y > max.y) {
|
|
|
- max.y = p.y;
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
- lineStr.push(' ">');
|
|
|
-
|
|
|
- if (!aFill) {
|
|
|
- appendStroke(this, lineStr);
|
|
|
- } else {
|
|
|
- appendFill(this, lineStr, min, max);
|
|
|
- }
|
|
|
-
|
|
|
- lineStr.push('</g_vml_:shape>');
|
|
|
-
|
|
|
- this.element_.insertAdjacentHTML('beforeEnd', lineStr.join(''));
|
|
|
- }
|
|
|
- };
|
|
|
-
|
|
|
- function appendStroke(ctx, lineStr) {
|
|
|
- var a = processStyle(ctx.strokeStyle);
|
|
|
- var color = a.color;
|
|
|
- var opacity = a.alpha * ctx.globalAlpha;
|
|
|
- var lineWidth = ctx.lineScale_ * ctx.lineWidth;
|
|
|
-
|
|
|
- // VML cannot correctly render a line if the width is less than 1px.
|
|
|
- // In that case, we dilute the color to make the line look thinner.
|
|
|
- if (lineWidth < 1) {
|
|
|
- opacity *= lineWidth;
|
|
|
- }
|
|
|
-
|
|
|
- lineStr.push(
|
|
|
- '<g_vml_:stroke',
|
|
|
- ' opacity="', opacity, '"',
|
|
|
- ' joinstyle="', ctx.lineJoin, '"',
|
|
|
- ' miterlimit="', ctx.miterLimit, '"',
|
|
|
- ' endcap="', processLineCap(ctx.lineCap), '"',
|
|
|
- ' weight="', lineWidth, 'px"',
|
|
|
- ' color="', color, '" />'
|
|
|
- );
|
|
|
- }
|
|
|
-
|
|
|
- function appendFill(ctx, lineStr, min, max) {
|
|
|
- var fillStyle = ctx.fillStyle;
|
|
|
- var arcScaleX = ctx.arcScaleX_;
|
|
|
- var arcScaleY = ctx.arcScaleY_;
|
|
|
- var width = max.x - min.x;
|
|
|
- var height = max.y - min.y;
|
|
|
- if (fillStyle instanceof CanvasGradient_) {
|
|
|
- // TODO: Gradients transformed with the transformation matrix.
|
|
|
- var angle = 0;
|
|
|
- var focus = {x: 0, y: 0};
|
|
|
-
|
|
|
- // additional offset
|
|
|
- var shift = 0;
|
|
|
- // scale factor for offset
|
|
|
- var expansion = 1;
|
|
|
-
|
|
|
- if (fillStyle.type_ == 'gradient') {
|
|
|
- var x0 = fillStyle.x0_ / arcScaleX;
|
|
|
- var y0 = fillStyle.y0_ / arcScaleY;
|
|
|
- var x1 = fillStyle.x1_ / arcScaleX;
|
|
|
- var y1 = fillStyle.y1_ / arcScaleY;
|
|
|
- var p0 = ctx.getCoords_(x0, y0);
|
|
|
- var p1 = ctx.getCoords_(x1, y1);
|
|
|
- var dx = p1.x - p0.x;
|
|
|
- var dy = p1.y - p0.y;
|
|
|
- angle = Math.atan2(dx, dy) * 180 / Math.PI;
|
|
|
-
|
|
|
- // The angle should be a non-negative number.
|
|
|
- if (angle < 0) {
|
|
|
- angle += 360;
|
|
|
- }
|
|
|
-
|
|
|
- // Very small angles produce an unexpected result because they are
|
|
|
- // converted to a scientific notation string.
|
|
|
- if (angle < 1e-6) {
|
|
|
- angle = 0;
|
|
|
- }
|
|
|
- } else {
|
|
|
- var p0 = ctx.getCoords_(fillStyle.x0_, fillStyle.y0_);
|
|
|
- focus = {
|
|
|
- x: (p0.x - min.x) / width,
|
|
|
- y: (p0.y - min.y) / height
|
|
|
- };
|
|
|
-
|
|
|
- width /= arcScaleX * Z;
|
|
|
- height /= arcScaleY * Z;
|
|
|
- var dimension = m.max(width, height);
|
|
|
- shift = 2 * fillStyle.r0_ / dimension;
|
|
|
- expansion = 2 * fillStyle.r1_ / dimension - shift;
|
|
|
- }
|
|
|
-
|
|
|
- // We need to sort the color stops in ascending order by offset,
|
|
|
- // otherwise IE won't interpret it correctly.
|
|
|
- var stops = fillStyle.colors_;
|
|
|
- stops.sort(function(cs1, cs2) {
|
|
|
- return cs1.offset - cs2.offset;
|
|
|
- });
|
|
|
-
|
|
|
- var length = stops.length;
|
|
|
- var color1 = stops[0].color;
|
|
|
- var color2 = stops[length - 1].color;
|
|
|
- var opacity1 = stops[0].alpha * ctx.globalAlpha;
|
|
|
- var opacity2 = stops[length - 1].alpha * ctx.globalAlpha;
|
|
|
-
|
|
|
- var colors = [];
|
|
|
- for (var i = 0; i < length; i++) {
|
|
|
- var stop = stops[i];
|
|
|
- colors.push(stop.offset * expansion + shift + ' ' + stop.color);
|
|
|
- }
|
|
|
-
|
|
|
- // When colors attribute is used, the meanings of opacity and o:opacity2
|
|
|
- // are reversed.
|
|
|
- lineStr.push('<g_vml_:fill type="', fillStyle.type_, '"',
|
|
|
- ' method="none" focus="100%"',
|
|
|
- ' color="', color1, '"',
|
|
|
- ' color2="', color2, '"',
|
|
|
- ' colors="', colors.join(','), '"',
|
|
|
- ' opacity="', opacity2, '"',
|
|
|
- ' g_o_:opacity2="', opacity1, '"',
|
|
|
- ' angle="', angle, '"',
|
|
|
- ' focusposition="', focus.x, ',', focus.y, '" />');
|
|
|
- } else if (fillStyle instanceof CanvasPattern_) {
|
|
|
- if (width && height) {
|
|
|
- var deltaLeft = -min.x;
|
|
|
- var deltaTop = -min.y;
|
|
|
- lineStr.push('<g_vml_:fill',
|
|
|
- ' position="',
|
|
|
- deltaLeft / width * arcScaleX * arcScaleX, ',',
|
|
|
- deltaTop / height * arcScaleY * arcScaleY, '"',
|
|
|
- ' type="tile"',
|
|
|
- // TODO: Figure out the correct size to fit the scale.
|
|
|
- //' size="', w, 'px ', h, 'px"',
|
|
|
- ' src="', fillStyle.src_, '" />');
|
|
|
- }
|
|
|
- } else {
|
|
|
- var a = processStyle(ctx.fillStyle);
|
|
|
- var color = a.color;
|
|
|
- var opacity = a.alpha * ctx.globalAlpha;
|
|
|
- lineStr.push('<g_vml_:fill color="', color, '" opacity="', opacity,
|
|
|
- '" />');
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- contextPrototype.fill = function() {
|
|
|
- this.stroke(true);
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.closePath = function() {
|
|
|
- this.currentPath_.push({type: 'close'});
|
|
|
- };
|
|
|
-
|
|
|
- /**
|
|
|
- * @private
|
|
|
- */
|
|
|
- contextPrototype.getCoords_ = function(aX, aY) {
|
|
|
- var m = this.m_;
|
|
|
- return {
|
|
|
- x: Z * (aX * m[0][0] + aY * m[1][0] + m[2][0]) - Z2,
|
|
|
- y: Z * (aX * m[0][1] + aY * m[1][1] + m[2][1]) - Z2
|
|
|
- };
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.save = function() {
|
|
|
- var o = {};
|
|
|
- copyState(this, o);
|
|
|
- this.aStack_.push(o);
|
|
|
- this.mStack_.push(this.m_);
|
|
|
- this.m_ = matrixMultiply(createMatrixIdentity(), this.m_);
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.restore = function() {
|
|
|
- if (this.aStack_.length) {
|
|
|
- copyState(this.aStack_.pop(), this);
|
|
|
- this.m_ = this.mStack_.pop();
|
|
|
- }
|
|
|
- };
|
|
|
-
|
|
|
- function matrixIsFinite(m) {
|
|
|
- return isFinite(m[0][0]) && isFinite(m[0][1]) &&
|
|
|
- isFinite(m[1][0]) && isFinite(m[1][1]) &&
|
|
|
- isFinite(m[2][0]) && isFinite(m[2][1]);
|
|
|
- }
|
|
|
-
|
|
|
- function setM(ctx, m, updateLineScale) {
|
|
|
- if (!matrixIsFinite(m)) {
|
|
|
- return;
|
|
|
- }
|
|
|
- ctx.m_ = m;
|
|
|
-
|
|
|
- if (updateLineScale) {
|
|
|
- // Get the line scale.
|
|
|
- // Determinant of this.m_ means how much the area is enlarged by the
|
|
|
- // transformation. So its square root can be used as a scale factor
|
|
|
- // for width.
|
|
|
- var det = m[0][0] * m[1][1] - m[0][1] * m[1][0];
|
|
|
- ctx.lineScale_ = sqrt(abs(det));
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- contextPrototype.translate = function(aX, aY) {
|
|
|
- var m1 = [
|
|
|
- [1, 0, 0],
|
|
|
- [0, 1, 0],
|
|
|
- [aX, aY, 1]
|
|
|
- ];
|
|
|
-
|
|
|
- setM(this, matrixMultiply(m1, this.m_), false);
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.rotate = function(aRot) {
|
|
|
- var c = mc(aRot);
|
|
|
- var s = ms(aRot);
|
|
|
-
|
|
|
- var m1 = [
|
|
|
- [c, s, 0],
|
|
|
- [-s, c, 0],
|
|
|
- [0, 0, 1]
|
|
|
- ];
|
|
|
-
|
|
|
- setM(this, matrixMultiply(m1, this.m_), false);
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.scale = function(aX, aY) {
|
|
|
- this.arcScaleX_ *= aX;
|
|
|
- this.arcScaleY_ *= aY;
|
|
|
- var m1 = [
|
|
|
- [aX, 0, 0],
|
|
|
- [0, aY, 0],
|
|
|
- [0, 0, 1]
|
|
|
- ];
|
|
|
-
|
|
|
- setM(this, matrixMultiply(m1, this.m_), true);
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.transform = function(m11, m12, m21, m22, dx, dy) {
|
|
|
- var m1 = [
|
|
|
- [m11, m12, 0],
|
|
|
- [m21, m22, 0],
|
|
|
- [dx, dy, 1]
|
|
|
- ];
|
|
|
-
|
|
|
- setM(this, matrixMultiply(m1, this.m_), true);
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.setTransform = function(m11, m12, m21, m22, dx, dy) {
|
|
|
- var m = [
|
|
|
- [m11, m12, 0],
|
|
|
- [m21, m22, 0],
|
|
|
- [dx, dy, 1]
|
|
|
- ];
|
|
|
-
|
|
|
- setM(this, m, true);
|
|
|
- };
|
|
|
-
|
|
|
- /**
|
|
|
- * The text drawing function.
|
|
|
- * The maxWidth argument isn't taken in account, since no browser supports
|
|
|
- * it yet.
|
|
|
- */
|
|
|
- contextPrototype.drawText_ = function(text, x, y, maxWidth, stroke) {
|
|
|
- var m = this.m_,
|
|
|
- delta = 1000,
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|
|
- left = 0,
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|
- right = delta,
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|
|
- offset = {x: 0, y: 0},
|
|
|
- lineStr = [];
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|
|
-
|
|
|
- var fontStyle = getComputedStyle(processFontStyle(this.font),
|
|
|
- this.element_);
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|
|
-
|
|
|
- var fontStyleString = buildStyle(fontStyle);
|
|
|
-
|
|
|
- var elementStyle = this.element_.currentStyle;
|
|
|
- var textAlign = this.textAlign.toLowerCase();
|
|
|
- switch (textAlign) {
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|
|
- case 'left':
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|
|
- case 'center':
|
|
|
- case 'right':
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|
|
- break;
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|
|
- case 'end':
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|
|
- textAlign = elementStyle.direction == 'ltr' ? 'right' : 'left';
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|
|
- break;
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|
|
- case 'start':
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|
|
- textAlign = elementStyle.direction == 'rtl' ? 'right' : 'left';
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|
|
- break;
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|
|
- default:
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|
|
- textAlign = 'left';
|
|
|
- }
|
|
|
-
|
|
|
- // 1.75 is an arbitrary number, as there is no info about the text baseline
|
|
|
- switch (this.textBaseline) {
|
|
|
- case 'hanging':
|
|
|
- case 'top':
|
|
|
- offset.y = fontStyle.size / 1.75;
|
|
|
- break;
|
|
|
- case 'middle':
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|
|
- break;
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|
|
- default:
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|
|
- case null:
|
|
|
- case 'alphabetic':
|
|
|
- case 'ideographic':
|
|
|
- case 'bottom':
|
|
|
- offset.y = -fontStyle.size / 2.25;
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- switch(textAlign) {
|
|
|
- case 'right':
|
|
|
- left = delta;
|
|
|
- right = 0.05;
|
|
|
- break;
|
|
|
- case 'center':
|
|
|
- left = right = delta / 2;
|
|
|
- break;
|
|
|
- }
|
|
|
-
|
|
|
- var d = this.getCoords_(x + offset.x, y + offset.y);
|
|
|
-
|
|
|
- lineStr.push('<g_vml_:line from="', -left ,' 0" to="', right ,' 0.05" ',
|
|
|
- ' coordsize="100 100" coordorigin="0 0"',
|
|
|
- ' filled="', !stroke, '" stroked="', !!stroke,
|
|
|
- '" style="position:absolute;width:1px;height:1px;">');
|
|
|
-
|
|
|
- if (stroke) {
|
|
|
- appendStroke(this, lineStr);
|
|
|
- } else {
|
|
|
- // TODO: Fix the min and max params.
|
|
|
- appendFill(this, lineStr, {x: -left, y: 0},
|
|
|
- {x: right, y: fontStyle.size});
|
|
|
- }
|
|
|
-
|
|
|
- var skewM = m[0][0].toFixed(3) + ',' + m[1][0].toFixed(3) + ',' +
|
|
|
- m[0][1].toFixed(3) + ',' + m[1][1].toFixed(3) + ',0,0';
|
|
|
-
|
|
|
- var skewOffset = mr(d.x / Z) + ',' + mr(d.y / Z);
|
|
|
-
|
|
|
- lineStr.push('<g_vml_:skew on="t" matrix="', skewM ,'" ',
|
|
|
- ' offset="', skewOffset, '" origin="', left ,' 0" />',
|
|
|
- '<g_vml_:path textpathok="true" />',
|
|
|
- '<g_vml_:textpath on="true" string="',
|
|
|
- encodeHtmlAttribute(text),
|
|
|
- '" style="v-text-align:', textAlign,
|
|
|
- ';font:', encodeHtmlAttribute(fontStyleString),
|
|
|
- '" /></g_vml_:line>');
|
|
|
-
|
|
|
- this.element_.insertAdjacentHTML('beforeEnd', lineStr.join(''));
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.fillText = function(text, x, y, maxWidth) {
|
|
|
- this.drawText_(text, x, y, maxWidth, false);
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.strokeText = function(text, x, y, maxWidth) {
|
|
|
- this.drawText_(text, x, y, maxWidth, true);
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.measureText = function(text) {
|
|
|
- if (!this.textMeasureEl_) {
|
|
|
- var s = '<span style="position:absolute;' +
|
|
|
- 'top:-20000px;left:0;padding:0;margin:0;border:none;' +
|
|
|
- 'white-space:pre;"></span>';
|
|
|
- this.element_.insertAdjacentHTML('beforeEnd', s);
|
|
|
- this.textMeasureEl_ = this.element_.lastChild;
|
|
|
- }
|
|
|
- var doc = this.element_.ownerDocument;
|
|
|
- this.textMeasureEl_.innerHTML = '';
|
|
|
- this.textMeasureEl_.style.font = this.font;
|
|
|
- // Don't use innerHTML or innerText because they allow markup/whitespace.
|
|
|
- this.textMeasureEl_.appendChild(doc.createTextNode(text));
|
|
|
- return {width: this.textMeasureEl_.offsetWidth};
|
|
|
- };
|
|
|
-
|
|
|
- /******** STUBS ********/
|
|
|
- contextPrototype.clip = function() {
|
|
|
- // TODO: Implement
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.arcTo = function() {
|
|
|
- // TODO: Implement
|
|
|
- };
|
|
|
-
|
|
|
- contextPrototype.createPattern = function(image, repetition) {
|
|
|
- return new CanvasPattern_(image, repetition);
|
|
|
- };
|
|
|
-
|
|
|
- // Gradient / Pattern Stubs
|
|
|
- function CanvasGradient_(aType) {
|
|
|
- this.type_ = aType;
|
|
|
- this.x0_ = 0;
|
|
|
- this.y0_ = 0;
|
|
|
- this.r0_ = 0;
|
|
|
- this.x1_ = 0;
|
|
|
- this.y1_ = 0;
|
|
|
- this.r1_ = 0;
|
|
|
- this.colors_ = [];
|
|
|
- }
|
|
|
-
|
|
|
- CanvasGradient_.prototype.addColorStop = function(aOffset, aColor) {
|
|
|
- aColor = processStyle(aColor);
|
|
|
- this.colors_.push({offset: aOffset,
|
|
|
- color: aColor.color,
|
|
|
- alpha: aColor.alpha});
|
|
|
- };
|
|
|
-
|
|
|
- function CanvasPattern_(image, repetition) {
|
|
|
- assertImageIsValid(image);
|
|
|
- switch (repetition) {
|
|
|
- case 'repeat':
|
|
|
- case null:
|
|
|
- case '':
|
|
|
- this.repetition_ = 'repeat';
|
|
|
- break
|
|
|
- case 'repeat-x':
|
|
|
- case 'repeat-y':
|
|
|
- case 'no-repeat':
|
|
|
- this.repetition_ = repetition;
|
|
|
- break;
|
|
|
- default:
|
|
|
- throwException('SYNTAX_ERR');
|
|
|
- }
|
|
|
-
|
|
|
- this.src_ = image.src;
|
|
|
- this.width_ = image.width;
|
|
|
- this.height_ = image.height;
|
|
|
- }
|
|
|
-
|
|
|
- function throwException(s) {
|
|
|
- throw new DOMException_(s);
|
|
|
- }
|
|
|
-
|
|
|
- function assertImageIsValid(img) {
|
|
|
- if (!img || img.nodeType != 1 || img.tagName != 'IMG') {
|
|
|
- throwException('TYPE_MISMATCH_ERR');
|
|
|
- }
|
|
|
- if (img.readyState != 'complete') {
|
|
|
- throwException('INVALID_STATE_ERR');
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- function DOMException_(s) {
|
|
|
- this.code = this[s];
|
|
|
- this.message = s +': DOM Exception ' + this.code;
|
|
|
- }
|
|
|
- var p = DOMException_.prototype = new Error;
|
|
|
- p.INDEX_SIZE_ERR = 1;
|
|
|
- p.DOMSTRING_SIZE_ERR = 2;
|
|
|
- p.HIERARCHY_REQUEST_ERR = 3;
|
|
|
- p.WRONG_DOCUMENT_ERR = 4;
|
|
|
- p.INVALID_CHARACTER_ERR = 5;
|
|
|
- p.NO_DATA_ALLOWED_ERR = 6;
|
|
|
- p.NO_MODIFICATION_ALLOWED_ERR = 7;
|
|
|
- p.NOT_FOUND_ERR = 8;
|
|
|
- p.NOT_SUPPORTED_ERR = 9;
|
|
|
- p.INUSE_ATTRIBUTE_ERR = 10;
|
|
|
- p.INVALID_STATE_ERR = 11;
|
|
|
- p.SYNTAX_ERR = 12;
|
|
|
- p.INVALID_MODIFICATION_ERR = 13;
|
|
|
- p.NAMESPACE_ERR = 14;
|
|
|
- p.INVALID_ACCESS_ERR = 15;
|
|
|
- p.VALIDATION_ERR = 16;
|
|
|
- p.TYPE_MISMATCH_ERR = 17;
|
|
|
-
|
|
|
- // set up externs
|
|
|
- G_vmlCanvasManager = G_vmlCanvasManager_;
|
|
|
- CanvasRenderingContext2D = CanvasRenderingContext2D_;
|
|
|
- CanvasGradient = CanvasGradient_;
|
|
|
- CanvasPattern = CanvasPattern_;
|
|
|
- DOMException = DOMException_;
|
|
|
-})();
|
|
|
-
|
|
|
-} // if
|
Martin Edenhofer