| 9 |
lars |
1 |
// Memory Leaks patch from http://explorercanvas.googlecode.com/svn/trunk/
|
|
|
2 |
// svn : r73
|
|
|
3 |
// ------------------------------------------------------------------
|
|
|
4 |
// Copyright 2006 Google Inc.
|
|
|
5 |
//
|
|
|
6 |
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
|
7 |
// you may not use this file except in compliance with the License.
|
|
|
8 |
// You may obtain a copy of the License at
|
|
|
9 |
//
|
|
|
10 |
// http://www.apache.org/licenses/LICENSE-2.0
|
|
|
11 |
//
|
|
|
12 |
// Unless required by applicable law or agreed to in writing, software
|
|
|
13 |
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
|
14 |
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
|
15 |
// See the License for the specific language governing permissions and
|
|
|
16 |
// limitations under the License.
|
|
|
17 |
|
|
|
18 |
|
|
|
19 |
// Known Issues:
|
|
|
20 |
//
|
|
|
21 |
// * Patterns only support repeat.
|
|
|
22 |
// * Radial gradient are not implemented. The VML version of these look very
|
|
|
23 |
// different from the canvas one.
|
|
|
24 |
// * Clipping paths are not implemented.
|
|
|
25 |
// * Coordsize. The width and height attribute have higher priority than the
|
|
|
26 |
// width and height style values which isn't correct.
|
|
|
27 |
// * Painting mode isn't implemented.
|
|
|
28 |
// * Canvas width/height should is using content-box by default. IE in
|
|
|
29 |
// Quirks mode will draw the canvas using border-box. Either change your
|
|
|
30 |
// doctype to HTML5
|
|
|
31 |
// (http://www.whatwg.org/specs/web-apps/current-work/#the-doctype)
|
|
|
32 |
// or use Box Sizing Behavior from WebFX
|
|
|
33 |
// (http://webfx.eae.net/dhtml/boxsizing/boxsizing.html)
|
|
|
34 |
// * Non uniform scaling does not correctly scale strokes.
|
|
|
35 |
// * Optimize. There is always room for speed improvements.
|
|
|
36 |
|
|
|
37 |
// Only add this code if we do not already have a canvas implementation
|
|
|
38 |
if (!document.createElement('canvas').getContext) {
|
|
|
39 |
|
|
|
40 |
(function() {
|
|
|
41 |
|
|
|
42 |
// alias some functions to make (compiled) code shorter
|
|
|
43 |
var m = Math;
|
|
|
44 |
var mr = m.round;
|
|
|
45 |
var ms = m.sin;
|
|
|
46 |
var mc = m.cos;
|
|
|
47 |
var abs = m.abs;
|
|
|
48 |
var sqrt = m.sqrt;
|
|
|
49 |
|
|
|
50 |
// this is used for sub pixel precision
|
|
|
51 |
var Z = 10;
|
|
|
52 |
var Z2 = Z / 2;
|
|
|
53 |
|
|
|
54 |
var IE_VERSION = +navigator.userAgent.match(/MSIE ([\d.]+)?/)[1];
|
|
|
55 |
|
|
|
56 |
/**
|
|
|
57 |
* This funtion is assigned to the <canvas> elements as element.getContext().
|
|
|
58 |
* @this {HTMLElement}
|
|
|
59 |
* @return {CanvasRenderingContext2D_}
|
|
|
60 |
*/
|
|
|
61 |
function getContext() {
|
|
|
62 |
return this.context_ ||
|
|
|
63 |
(this.context_ = new CanvasRenderingContext2D_(this));
|
|
|
64 |
}
|
|
|
65 |
|
|
|
66 |
var slice = Array.prototype.slice;
|
|
|
67 |
|
|
|
68 |
/**
|
|
|
69 |
* Binds a function to an object. The returned function will always use the
|
|
|
70 |
* passed in {@code obj} as {@code this}.
|
|
|
71 |
*
|
|
|
72 |
* Example:
|
|
|
73 |
*
|
|
|
74 |
* g = bind(f, obj, a, b)
|
|
|
75 |
* g(c, d) // will do f.call(obj, a, b, c, d)
|
|
|
76 |
*
|
|
|
77 |
* @param {Function} f The function to bind the object to
|
|
|
78 |
* @param {Object} obj The object that should act as this when the function
|
|
|
79 |
* is called
|
|
|
80 |
* @param {*} var_args Rest arguments that will be used as the initial
|
|
|
81 |
* arguments when the function is called
|
|
|
82 |
* @return {Function} A new function that has bound this
|
|
|
83 |
*/
|
|
|
84 |
function bind(f, obj, var_args) {
|
|
|
85 |
var a = slice.call(arguments, 2);
|
|
|
86 |
return function() {
|
|
|
87 |
return f.apply(obj, a.concat(slice.call(arguments)));
|
|
|
88 |
};
|
|
|
89 |
}
|
|
|
90 |
|
|
|
91 |
function encodeHtmlAttribute(s) {
|
|
|
92 |
return String(s).replace(/&/g, '&').replace(/"/g, '"');
|
|
|
93 |
}
|
|
|
94 |
|
|
|
95 |
function addNamespace(doc, prefix, urn) {
|
|
|
96 |
if (!doc.namespaces[prefix]) {
|
|
|
97 |
doc.namespaces.add(prefix, urn, '#default#VML');
|
|
|
98 |
}
|
|
|
99 |
}
|
|
|
100 |
|
|
|
101 |
function addNamespacesAndStylesheet(doc) {
|
|
|
102 |
addNamespace(doc, 'g_vml_', 'urn:schemas-microsoft-com:vml');
|
|
|
103 |
addNamespace(doc, 'g_o_', 'urn:schemas-microsoft-com:office:office');
|
|
|
104 |
|
|
|
105 |
// Setup default CSS. Only add one style sheet per document
|
|
|
106 |
if (!doc.styleSheets['ex_canvas_']) {
|
|
|
107 |
var ss = doc.createStyleSheet();
|
|
|
108 |
ss.owningElement.id = 'ex_canvas_';
|
|
|
109 |
ss.cssText = 'canvas{display:inline-block;overflow:hidden;' +
|
|
|
110 |
// default size is 300x150 in Gecko and Opera
|
|
|
111 |
'text-align:left;width:300px;height:150px}';
|
|
|
112 |
}
|
|
|
113 |
}
|
|
|
114 |
|
|
|
115 |
// Add namespaces and stylesheet at startup.
|
|
|
116 |
addNamespacesAndStylesheet(document);
|
|
|
117 |
|
|
|
118 |
var G_vmlCanvasManager_ = {
|
|
|
119 |
init: function(opt_doc) {
|
|
|
120 |
var doc = opt_doc || document;
|
|
|
121 |
// Create a dummy element so that IE will allow canvas elements to be
|
|
|
122 |
// recognized.
|
|
|
123 |
doc.createElement('canvas');
|
|
|
124 |
doc.attachEvent('onreadystatechange', bind(this.init_, this, doc));
|
|
|
125 |
},
|
|
|
126 |
|
|
|
127 |
init_: function(doc) {
|
|
|
128 |
// find all canvas elements
|
|
|
129 |
var els = doc.getElementsByTagName('canvas');
|
|
|
130 |
for (var i = 0; i < els.length; i++) {
|
|
|
131 |
this.initElement(els[i]);
|
|
|
132 |
}
|
|
|
133 |
},
|
|
|
134 |
|
|
|
135 |
/**
|
|
|
136 |
* Public initializes a canvas element so that it can be used as canvas
|
|
|
137 |
* element from now on. This is called automatically before the page is
|
|
|
138 |
* loaded but if you are creating elements using createElement you need to
|
|
|
139 |
* make sure this is called on the element.
|
|
|
140 |
* @param {HTMLElement} el The canvas element to initialize.
|
|
|
141 |
* @return {HTMLElement} the element that was created.
|
|
|
142 |
*/
|
|
|
143 |
initElement: function(el) {
|
|
|
144 |
if (!el.getContext) {
|
|
|
145 |
el.getContext = getContext;
|
|
|
146 |
|
|
|
147 |
// Add namespaces and stylesheet to document of the element.
|
|
|
148 |
addNamespacesAndStylesheet(el.ownerDocument);
|
|
|
149 |
|
|
|
150 |
// Remove fallback content. There is no way to hide text nodes so we
|
|
|
151 |
// just remove all childNodes. We could hide all elements and remove
|
|
|
152 |
// text nodes but who really cares about the fallback content.
|
|
|
153 |
el.innerHTML = '';
|
|
|
154 |
|
|
|
155 |
// do not use inline function because that will leak memory
|
|
|
156 |
el.attachEvent('onpropertychange', onPropertyChange);
|
|
|
157 |
el.attachEvent('onresize', onResize);
|
|
|
158 |
|
|
|
159 |
var attrs = el.attributes;
|
|
|
160 |
if (attrs.width && attrs.width.specified) {
|
|
|
161 |
// TODO: use runtimeStyle and coordsize
|
|
|
162 |
// el.getContext().setWidth_(attrs.width.nodeValue);
|
|
|
163 |
el.style.width = attrs.width.nodeValue + 'px';
|
|
|
164 |
} else {
|
|
|
165 |
el.width = el.clientWidth;
|
|
|
166 |
}
|
|
|
167 |
if (attrs.height && attrs.height.specified) {
|
|
|
168 |
// TODO: use runtimeStyle and coordsize
|
|
|
169 |
// el.getContext().setHeight_(attrs.height.nodeValue);
|
|
|
170 |
el.style.height = attrs.height.nodeValue + 'px';
|
|
|
171 |
} else {
|
|
|
172 |
el.height = el.clientHeight;
|
|
|
173 |
}
|
|
|
174 |
//el.getContext().setCoordsize_()
|
|
|
175 |
}
|
|
|
176 |
return el;
|
|
|
177 |
},
|
|
|
178 |
|
|
|
179 |
// Memory Leaks patch : see http://code.google.com/p/explorercanvas/issues/detail?id=82
|
|
|
180 |
uninitElement: function(el){
|
|
|
181 |
if (el.getContext) {
|
|
|
182 |
var ctx = el.getContext();
|
|
|
183 |
delete ctx.element_;
|
|
|
184 |
delete ctx.canvas;
|
|
|
185 |
el.innerHTML = "";
|
|
|
186 |
//el.outerHTML = "";
|
|
|
187 |
el.context_ = null;
|
|
|
188 |
el.getContext = null;
|
|
|
189 |
el.detachEvent("onpropertychange", onPropertyChange);
|
|
|
190 |
el.detachEvent("onresize", onResize);
|
|
|
191 |
}
|
|
|
192 |
}
|
|
|
193 |
};
|
|
|
194 |
|
|
|
195 |
function onPropertyChange(e) {
|
|
|
196 |
var el = e.srcElement;
|
|
|
197 |
|
|
|
198 |
switch (e.propertyName) {
|
|
|
199 |
case 'width':
|
|
|
200 |
el.getContext().clearRect();
|
|
|
201 |
el.style.width = el.attributes.width.nodeValue + 'px';
|
|
|
202 |
// In IE8 this does not trigger onresize.
|
|
|
203 |
el.firstChild.style.width = el.clientWidth + 'px';
|
|
|
204 |
break;
|
|
|
205 |
case 'height':
|
|
|
206 |
el.getContext().clearRect();
|
|
|
207 |
el.style.height = el.attributes.height.nodeValue + 'px';
|
|
|
208 |
el.firstChild.style.height = el.clientHeight + 'px';
|
|
|
209 |
break;
|
|
|
210 |
}
|
|
|
211 |
}
|
|
|
212 |
|
|
|
213 |
function onResize(e) {
|
|
|
214 |
var el = e.srcElement;
|
|
|
215 |
if (el.firstChild) {
|
|
|
216 |
el.firstChild.style.width = el.clientWidth + 'px';
|
|
|
217 |
el.firstChild.style.height = el.clientHeight + 'px';
|
|
|
218 |
}
|
|
|
219 |
}
|
|
|
220 |
|
|
|
221 |
G_vmlCanvasManager_.init();
|
|
|
222 |
|
|
|
223 |
// precompute "00" to "FF"
|
|
|
224 |
var decToHex = [];
|
|
|
225 |
for (var i = 0; i < 16; i++) {
|
|
|
226 |
for (var j = 0; j < 16; j++) {
|
|
|
227 |
decToHex[i * 16 + j] = i.toString(16) + j.toString(16);
|
|
|
228 |
}
|
|
|
229 |
}
|
|
|
230 |
|
|
|
231 |
function createMatrixIdentity() {
|
|
|
232 |
return [
|
|
|
233 |
[1, 0, 0],
|
|
|
234 |
[0, 1, 0],
|
|
|
235 |
[0, 0, 1]
|
|
|
236 |
];
|
|
|
237 |
}
|
|
|
238 |
|
|
|
239 |
function matrixMultiply(m1, m2) {
|
|
|
240 |
var result = createMatrixIdentity();
|
|
|
241 |
|
|
|
242 |
for (var x = 0; x < 3; x++) {
|
|
|
243 |
for (var y = 0; y < 3; y++) {
|
|
|
244 |
var sum = 0;
|
|
|
245 |
|
|
|
246 |
for (var z = 0; z < 3; z++) {
|
|
|
247 |
sum += m1[x][z] * m2[z][y];
|
|
|
248 |
}
|
|
|
249 |
|
|
|
250 |
result[x][y] = sum;
|
|
|
251 |
}
|
|
|
252 |
}
|
|
|
253 |
return result;
|
|
|
254 |
}
|
|
|
255 |
|
|
|
256 |
function copyState(o1, o2) {
|
|
|
257 |
o2.fillStyle = o1.fillStyle;
|
|
|
258 |
o2.lineCap = o1.lineCap;
|
|
|
259 |
o2.lineJoin = o1.lineJoin;
|
|
|
260 |
o2.lineWidth = o1.lineWidth;
|
|
|
261 |
o2.miterLimit = o1.miterLimit;
|
|
|
262 |
o2.shadowBlur = o1.shadowBlur;
|
|
|
263 |
o2.shadowColor = o1.shadowColor;
|
|
|
264 |
o2.shadowOffsetX = o1.shadowOffsetX;
|
|
|
265 |
o2.shadowOffsetY = o1.shadowOffsetY;
|
|
|
266 |
o2.strokeStyle = o1.strokeStyle;
|
|
|
267 |
o2.globalAlpha = o1.globalAlpha;
|
|
|
268 |
o2.font = o1.font;
|
|
|
269 |
o2.textAlign = o1.textAlign;
|
|
|
270 |
o2.textBaseline = o1.textBaseline;
|
|
|
271 |
o2.arcScaleX_ = o1.arcScaleX_;
|
|
|
272 |
o2.arcScaleY_ = o1.arcScaleY_;
|
|
|
273 |
o2.lineScale_ = o1.lineScale_;
|
|
|
274 |
}
|
|
|
275 |
|
|
|
276 |
var colorData = {
|
|
|
277 |
aliceblue: '#F0F8FF',
|
|
|
278 |
antiquewhite: '#FAEBD7',
|
|
|
279 |
aquamarine: '#7FFFD4',
|
|
|
280 |
azure: '#F0FFFF',
|
|
|
281 |
beige: '#F5F5DC',
|
|
|
282 |
bisque: '#FFE4C4',
|
|
|
283 |
black: '#000000',
|
|
|
284 |
blanchedalmond: '#FFEBCD',
|
|
|
285 |
blueviolet: '#8A2BE2',
|
|
|
286 |
brown: '#A52A2A',
|
|
|
287 |
burlywood: '#DEB887',
|
|
|
288 |
cadetblue: '#5F9EA0',
|
|
|
289 |
chartreuse: '#7FFF00',
|
|
|
290 |
chocolate: '#D2691E',
|
|
|
291 |
coral: '#FF7F50',
|
|
|
292 |
cornflowerblue: '#6495ED',
|
|
|
293 |
cornsilk: '#FFF8DC',
|
|
|
294 |
crimson: '#DC143C',
|
|
|
295 |
cyan: '#00FFFF',
|
|
|
296 |
darkblue: '#00008B',
|
|
|
297 |
darkcyan: '#008B8B',
|
|
|
298 |
darkgoldenrod: '#B8860B',
|
|
|
299 |
darkgray: '#A9A9A9',
|
|
|
300 |
darkgreen: '#006400',
|
|
|
301 |
darkgrey: '#A9A9A9',
|
|
|
302 |
darkkhaki: '#BDB76B',
|
|
|
303 |
darkmagenta: '#8B008B',
|
|
|
304 |
darkolivegreen: '#556B2F',
|
|
|
305 |
darkorange: '#FF8C00',
|
|
|
306 |
darkorchid: '#9932CC',
|
|
|
307 |
darkred: '#8B0000',
|
|
|
308 |
darksalmon: '#E9967A',
|
|
|
309 |
darkseagreen: '#8FBC8F',
|
|
|
310 |
darkslateblue: '#483D8B',
|
|
|
311 |
darkslategray: '#2F4F4F',
|
|
|
312 |
darkslategrey: '#2F4F4F',
|
|
|
313 |
darkturquoise: '#00CED1',
|
|
|
314 |
darkviolet: '#9400D3',
|
|
|
315 |
deeppink: '#FF1493',
|
|
|
316 |
deepskyblue: '#00BFFF',
|
|
|
317 |
dimgray: '#696969',
|
|
|
318 |
dimgrey: '#696969',
|
|
|
319 |
dodgerblue: '#1E90FF',
|
|
|
320 |
firebrick: '#B22222',
|
|
|
321 |
floralwhite: '#FFFAF0',
|
|
|
322 |
forestgreen: '#228B22',
|
|
|
323 |
gainsboro: '#DCDCDC',
|
|
|
324 |
ghostwhite: '#F8F8FF',
|
|
|
325 |
gold: '#FFD700',
|
|
|
326 |
goldenrod: '#DAA520',
|
|
|
327 |
grey: '#808080',
|
|
|
328 |
greenyellow: '#ADFF2F',
|
|
|
329 |
honeydew: '#F0FFF0',
|
|
|
330 |
hotpink: '#FF69B4',
|
|
|
331 |
indianred: '#CD5C5C',
|
|
|
332 |
indigo: '#4B0082',
|
|
|
333 |
ivory: '#FFFFF0',
|
|
|
334 |
khaki: '#F0E68C',
|
|
|
335 |
lavender: '#E6E6FA',
|
|
|
336 |
lavenderblush: '#FFF0F5',
|
|
|
337 |
lawngreen: '#7CFC00',
|
|
|
338 |
lemonchiffon: '#FFFACD',
|
|
|
339 |
lightblue: '#ADD8E6',
|
|
|
340 |
lightcoral: '#F08080',
|
|
|
341 |
lightcyan: '#E0FFFF',
|
|
|
342 |
lightgoldenrodyellow: '#FAFAD2',
|
|
|
343 |
lightgreen: '#90EE90',
|
|
|
344 |
lightgrey: '#D3D3D3',
|
|
|
345 |
lightpink: '#FFB6C1',
|
|
|
346 |
lightsalmon: '#FFA07A',
|
|
|
347 |
lightseagreen: '#20B2AA',
|
|
|
348 |
lightskyblue: '#87CEFA',
|
|
|
349 |
lightslategray: '#778899',
|
|
|
350 |
lightslategrey: '#778899',
|
|
|
351 |
lightsteelblue: '#B0C4DE',
|
|
|
352 |
lightyellow: '#FFFFE0',
|
|
|
353 |
limegreen: '#32CD32',
|
|
|
354 |
linen: '#FAF0E6',
|
|
|
355 |
magenta: '#FF00FF',
|
|
|
356 |
mediumaquamarine: '#66CDAA',
|
|
|
357 |
mediumblue: '#0000CD',
|
|
|
358 |
mediumorchid: '#BA55D3',
|
|
|
359 |
mediumpurple: '#9370DB',
|
|
|
360 |
mediumseagreen: '#3CB371',
|
|
|
361 |
mediumslateblue: '#7B68EE',
|
|
|
362 |
mediumspringgreen: '#00FA9A',
|
|
|
363 |
mediumturquoise: '#48D1CC',
|
|
|
364 |
mediumvioletred: '#C71585',
|
|
|
365 |
midnightblue: '#191970',
|
|
|
366 |
mintcream: '#F5FFFA',
|
|
|
367 |
mistyrose: '#FFE4E1',
|
|
|
368 |
moccasin: '#FFE4B5',
|
|
|
369 |
navajowhite: '#FFDEAD',
|
|
|
370 |
oldlace: '#FDF5E6',
|
|
|
371 |
olivedrab: '#6B8E23',
|
|
|
372 |
orange: '#FFA500',
|
|
|
373 |
orangered: '#FF4500',
|
|
|
374 |
orchid: '#DA70D6',
|
|
|
375 |
palegoldenrod: '#EEE8AA',
|
|
|
376 |
palegreen: '#98FB98',
|
|
|
377 |
paleturquoise: '#AFEEEE',
|
|
|
378 |
palevioletred: '#DB7093',
|
|
|
379 |
papayawhip: '#FFEFD5',
|
|
|
380 |
peachpuff: '#FFDAB9',
|
|
|
381 |
peru: '#CD853F',
|
|
|
382 |
pink: '#FFC0CB',
|
|
|
383 |
plum: '#DDA0DD',
|
|
|
384 |
powderblue: '#B0E0E6',
|
|
|
385 |
rosybrown: '#BC8F8F',
|
|
|
386 |
royalblue: '#4169E1',
|
|
|
387 |
saddlebrown: '#8B4513',
|
|
|
388 |
salmon: '#FA8072',
|
|
|
389 |
sandybrown: '#F4A460',
|
|
|
390 |
seagreen: '#2E8B57',
|
|
|
391 |
seashell: '#FFF5EE',
|
|
|
392 |
sienna: '#A0522D',
|
|
|
393 |
skyblue: '#87CEEB',
|
|
|
394 |
slateblue: '#6A5ACD',
|
|
|
395 |
slategray: '#708090',
|
|
|
396 |
slategrey: '#708090',
|
|
|
397 |
snow: '#FFFAFA',
|
|
|
398 |
springgreen: '#00FF7F',
|
|
|
399 |
steelblue: '#4682B4',
|
|
|
400 |
tan: '#D2B48C',
|
|
|
401 |
thistle: '#D8BFD8',
|
|
|
402 |
tomato: '#FF6347',
|
|
|
403 |
turquoise: '#40E0D0',
|
|
|
404 |
violet: '#EE82EE',
|
|
|
405 |
wheat: '#F5DEB3',
|
|
|
406 |
whitesmoke: '#F5F5F5',
|
|
|
407 |
yellowgreen: '#9ACD32'
|
|
|
408 |
};
|
|
|
409 |
|
|
|
410 |
|
|
|
411 |
function getRgbHslContent(styleString) {
|
|
|
412 |
var start = styleString.indexOf('(', 3);
|
|
|
413 |
var end = styleString.indexOf(')', start + 1);
|
|
|
414 |
var parts = styleString.substring(start + 1, end).split(',');
|
|
|
415 |
// add alpha if needed
|
|
|
416 |
if (parts.length != 4 || styleString.charAt(3) != 'a') {
|
|
|
417 |
parts[3] = 1;
|
|
|
418 |
}
|
|
|
419 |
return parts;
|
|
|
420 |
}
|
|
|
421 |
|
|
|
422 |
function percent(s) {
|
|
|
423 |
return parseFloat(s) / 100;
|
|
|
424 |
}
|
|
|
425 |
|
|
|
426 |
function clamp(v, min, max) {
|
|
|
427 |
return Math.min(max, Math.max(min, v));
|
|
|
428 |
}
|
|
|
429 |
|
|
|
430 |
function hslToRgb(parts){
|
|
|
431 |
var r, g, b, h, s, l;
|
|
|
432 |
h = parseFloat(parts[0]) / 360 % 360;
|
|
|
433 |
if (h < 0)
|
|
|
434 |
h++;
|
|
|
435 |
s = clamp(percent(parts[1]), 0, 1);
|
|
|
436 |
l = clamp(percent(parts[2]), 0, 1);
|
|
|
437 |
if (s == 0) {
|
|
|
438 |
r = g = b = l; // achromatic
|
|
|
439 |
} else {
|
|
|
440 |
var q = l < 0.5 ? l * (1 + s) : l + s - l * s;
|
|
|
441 |
var p = 2 * l - q;
|
|
|
442 |
r = hueToRgb(p, q, h + 1 / 3);
|
|
|
443 |
g = hueToRgb(p, q, h);
|
|
|
444 |
b = hueToRgb(p, q, h - 1 / 3);
|
|
|
445 |
}
|
|
|
446 |
|
|
|
447 |
return '#' + decToHex[Math.floor(r * 255)] +
|
|
|
448 |
decToHex[Math.floor(g * 255)] +
|
|
|
449 |
decToHex[Math.floor(b * 255)];
|
|
|
450 |
}
|
|
|
451 |
|
|
|
452 |
function hueToRgb(m1, m2, h) {
|
|
|
453 |
if (h < 0)
|
|
|
454 |
h++;
|
|
|
455 |
if (h > 1)
|
|
|
456 |
h--;
|
|
|
457 |
|
|
|
458 |
if (6 * h < 1)
|
|
|
459 |
return m1 + (m2 - m1) * 6 * h;
|
|
|
460 |
else if (2 * h < 1)
|
|
|
461 |
return m2;
|
|
|
462 |
else if (3 * h < 2)
|
|
|
463 |
return m1 + (m2 - m1) * (2 / 3 - h) * 6;
|
|
|
464 |
else
|
|
|
465 |
return m1;
|
|
|
466 |
}
|
|
|
467 |
|
|
|
468 |
var processStyleCache = {};
|
|
|
469 |
|
|
|
470 |
function processStyle(styleString) {
|
|
|
471 |
if (styleString in processStyleCache) {
|
|
|
472 |
return processStyleCache[styleString];
|
|
|
473 |
}
|
|
|
474 |
|
|
|
475 |
var str, alpha = 1;
|
|
|
476 |
|
|
|
477 |
styleString = String(styleString);
|
|
|
478 |
if (styleString.charAt(0) == '#') {
|
|
|
479 |
str = styleString;
|
|
|
480 |
} else if (/^rgb/.test(styleString)) {
|
|
|
481 |
var parts = getRgbHslContent(styleString);
|
|
|
482 |
var str = '#', n;
|
|
|
483 |
for (var i = 0; i < 3; i++) {
|
|
|
484 |
if (parts[i].indexOf('%') != -1) {
|
|
|
485 |
n = Math.floor(percent(parts[i]) * 255);
|
|
|
486 |
} else {
|
|
|
487 |
n = +parts[i];
|
|
|
488 |
}
|
|
|
489 |
str += decToHex[clamp(n, 0, 255)];
|
|
|
490 |
}
|
|
|
491 |
alpha = +parts[3];
|
|
|
492 |
} else if (/^hsl/.test(styleString)) {
|
|
|
493 |
var parts = getRgbHslContent(styleString);
|
|
|
494 |
str = hslToRgb(parts);
|
|
|
495 |
alpha = parts[3];
|
|
|
496 |
} else {
|
|
|
497 |
str = colorData[styleString] || styleString;
|
|
|
498 |
}
|
|
|
499 |
return processStyleCache[styleString] = {color: str, alpha: alpha};
|
|
|
500 |
}
|
|
|
501 |
|
|
|
502 |
var DEFAULT_STYLE = {
|
|
|
503 |
style: 'normal',
|
|
|
504 |
variant: 'normal',
|
|
|
505 |
weight: 'normal',
|
|
|
506 |
size: 10,
|
|
|
507 |
family: 'sans-serif'
|
|
|
508 |
};
|
|
|
509 |
|
|
|
510 |
// Internal text style cache
|
|
|
511 |
var fontStyleCache = {};
|
|
|
512 |
|
|
|
513 |
function processFontStyle(styleString) {
|
|
|
514 |
if (fontStyleCache[styleString]) {
|
|
|
515 |
return fontStyleCache[styleString];
|
|
|
516 |
}
|
|
|
517 |
|
|
|
518 |
var el = document.createElement('div');
|
|
|
519 |
var style = el.style;
|
|
|
520 |
try {
|
|
|
521 |
style.font = styleString;
|
|
|
522 |
} catch (ex) {
|
|
|
523 |
// Ignore failures to set to invalid font.
|
|
|
524 |
}
|
|
|
525 |
|
|
|
526 |
return fontStyleCache[styleString] = {
|
|
|
527 |
style: style.fontStyle || DEFAULT_STYLE.style,
|
|
|
528 |
variant: style.fontVariant || DEFAULT_STYLE.variant,
|
|
|
529 |
weight: style.fontWeight || DEFAULT_STYLE.weight,
|
|
|
530 |
size: style.fontSize || DEFAULT_STYLE.size,
|
|
|
531 |
family: style.fontFamily || DEFAULT_STYLE.family
|
|
|
532 |
};
|
|
|
533 |
}
|
|
|
534 |
|
|
|
535 |
function getComputedStyle(style, element) {
|
|
|
536 |
var computedStyle = {};
|
|
|
537 |
|
|
|
538 |
for (var p in style) {
|
|
|
539 |
computedStyle[p] = style[p];
|
|
|
540 |
}
|
|
|
541 |
|
|
|
542 |
// Compute the size
|
|
|
543 |
var canvasFontSize = parseFloat(element.currentStyle.fontSize),
|
|
|
544 |
fontSize = parseFloat(style.size);
|
|
|
545 |
|
|
|
546 |
if (typeof style.size == 'number') {
|
|
|
547 |
computedStyle.size = style.size;
|
|
|
548 |
} else if (style.size.indexOf('px') != -1) {
|
|
|
549 |
computedStyle.size = fontSize;
|
|
|
550 |
} else if (style.size.indexOf('em') != -1) {
|
|
|
551 |
computedStyle.size = canvasFontSize * fontSize;
|
|
|
552 |
} else if(style.size.indexOf('%') != -1) {
|
|
|
553 |
computedStyle.size = (canvasFontSize / 100) * fontSize;
|
|
|
554 |
} else if (style.size.indexOf('pt') != -1) {
|
|
|
555 |
computedStyle.size = fontSize / .75;
|
|
|
556 |
} else {
|
|
|
557 |
computedStyle.size = canvasFontSize;
|
|
|
558 |
}
|
|
|
559 |
|
|
|
560 |
// Different scaling between normal text and VML text. This was found using
|
|
|
561 |
// trial and error to get the same size as non VML text.
|
|
|
562 |
computedStyle.size *= 0.981;
|
|
|
563 |
|
|
|
564 |
// Fix for VML handling of bare font family names. Add a '' around font family names.
|
|
|
565 |
computedStyle.family = "'" + computedStyle.family.replace(/(\'|\")/g,'').replace(/\s*,\s*/g, "', '") + "'";
|
|
|
566 |
|
|
|
567 |
return computedStyle;
|
|
|
568 |
}
|
|
|
569 |
|
|
|
570 |
function buildStyle(style) {
|
|
|
571 |
return style.style + ' ' + style.variant + ' ' + style.weight + ' ' +
|
|
|
572 |
style.size + 'px ' + style.family;
|
|
|
573 |
}
|
|
|
574 |
|
|
|
575 |
var lineCapMap = {
|
|
|
576 |
'butt': 'flat',
|
|
|
577 |
'round': 'round'
|
|
|
578 |
};
|
|
|
579 |
|
|
|
580 |
function processLineCap(lineCap) {
|
|
|
581 |
return lineCapMap[lineCap] || 'square';
|
|
|
582 |
}
|
|
|
583 |
|
|
|
584 |
/**
|
|
|
585 |
* This class implements CanvasRenderingContext2D interface as described by
|
|
|
586 |
* the WHATWG.
|
|
|
587 |
* @param {HTMLElement} canvasElement The element that the 2D context should
|
|
|
588 |
* be associated with
|
|
|
589 |
*/
|
|
|
590 |
function CanvasRenderingContext2D_(canvasElement) {
|
|
|
591 |
this.m_ = createMatrixIdentity();
|
|
|
592 |
|
|
|
593 |
this.mStack_ = [];
|
|
|
594 |
this.aStack_ = [];
|
|
|
595 |
this.currentPath_ = [];
|
|
|
596 |
|
|
|
597 |
// Canvas context properties
|
|
|
598 |
this.strokeStyle = '#000';
|
|
|
599 |
this.fillStyle = '#000';
|
|
|
600 |
|
|
|
601 |
this.lineWidth = 1;
|
|
|
602 |
this.lineJoin = 'miter';
|
|
|
603 |
this.lineCap = 'butt';
|
|
|
604 |
this.miterLimit = Z * 1;
|
|
|
605 |
this.globalAlpha = 1;
|
|
|
606 |
this.font = '10px sans-serif';
|
|
|
607 |
this.textAlign = 'left';
|
|
|
608 |
this.textBaseline = 'alphabetic';
|
|
|
609 |
this.canvas = canvasElement;
|
|
|
610 |
|
|
|
611 |
var cssText = 'width:' + canvasElement.clientWidth + 'px;height:' +
|
|
|
612 |
canvasElement.clientHeight + 'px;overflow:hidden;position:absolute';
|
|
|
613 |
var el = canvasElement.ownerDocument.createElement('div');
|
|
|
614 |
el.style.cssText = cssText;
|
|
|
615 |
canvasElement.appendChild(el);
|
|
|
616 |
|
|
|
617 |
var overlayEl = el.cloneNode(false);
|
|
|
618 |
// Use a non transparent background.
|
|
|
619 |
overlayEl.style.backgroundColor = 'red';
|
|
|
620 |
overlayEl.style.filter = 'alpha(opacity=0)';
|
|
|
621 |
canvasElement.appendChild(overlayEl);
|
|
|
622 |
|
|
|
623 |
this.element_ = el;
|
|
|
624 |
this.arcScaleX_ = 1;
|
|
|
625 |
this.arcScaleY_ = 1;
|
|
|
626 |
this.lineScale_ = 1;
|
|
|
627 |
}
|
|
|
628 |
|
|
|
629 |
var contextPrototype = CanvasRenderingContext2D_.prototype;
|
|
|
630 |
contextPrototype.clearRect = function() {
|
|
|
631 |
if (this.textMeasureEl_) {
|
|
|
632 |
this.textMeasureEl_.removeNode(true);
|
|
|
633 |
this.textMeasureEl_ = null;
|
|
|
634 |
}
|
|
|
635 |
this.element_.innerHTML = '';
|
|
|
636 |
};
|
|
|
637 |
|
|
|
638 |
contextPrototype.beginPath = function() {
|
|
|
639 |
// TODO: Branch current matrix so that save/restore has no effect
|
|
|
640 |
// as per safari docs.
|
|
|
641 |
this.currentPath_ = [];
|
|
|
642 |
};
|
|
|
643 |
|
|
|
644 |
contextPrototype.moveTo = function(aX, aY) {
|
|
|
645 |
var p = getCoords(this, aX, aY);
|
|
|
646 |
this.currentPath_.push({type: 'moveTo', x: p.x, y: p.y});
|
|
|
647 |
this.currentX_ = p.x;
|
|
|
648 |
this.currentY_ = p.y;
|
|
|
649 |
};
|
|
|
650 |
|
|
|
651 |
contextPrototype.lineTo = function(aX, aY) {
|
|
|
652 |
var p = getCoords(this, aX, aY);
|
|
|
653 |
this.currentPath_.push({type: 'lineTo', x: p.x, y: p.y});
|
|
|
654 |
|
|
|
655 |
this.currentX_ = p.x;
|
|
|
656 |
this.currentY_ = p.y;
|
|
|
657 |
};
|
|
|
658 |
|
|
|
659 |
contextPrototype.bezierCurveTo = function(aCP1x, aCP1y,
|
|
|
660 |
aCP2x, aCP2y,
|
|
|
661 |
aX, aY) {
|
|
|
662 |
var p = getCoords(this, aX, aY);
|
|
|
663 |
var cp1 = getCoords(this, aCP1x, aCP1y);
|
|
|
664 |
var cp2 = getCoords(this, aCP2x, aCP2y);
|
|
|
665 |
bezierCurveTo(this, cp1, cp2, p);
|
|
|
666 |
};
|
|
|
667 |
|
|
|
668 |
// Helper function that takes the already fixed cordinates.
|
|
|
669 |
function bezierCurveTo(self, cp1, cp2, p) {
|
|
|
670 |
self.currentPath_.push({
|
|
|
671 |
type: 'bezierCurveTo',
|
|
|
672 |
cp1x: cp1.x,
|
|
|
673 |
cp1y: cp1.y,
|
|
|
674 |
cp2x: cp2.x,
|
|
|
675 |
cp2y: cp2.y,
|
|
|
676 |
x: p.x,
|
|
|
677 |
y: p.y
|
|
|
678 |
});
|
|
|
679 |
self.currentX_ = p.x;
|
|
|
680 |
self.currentY_ = p.y;
|
|
|
681 |
}
|
|
|
682 |
|
|
|
683 |
contextPrototype.quadraticCurveTo = function(aCPx, aCPy, aX, aY) {
|
|
|
684 |
// the following is lifted almost directly from
|
|
|
685 |
// http://developer.mozilla.org/en/docs/Canvas_tutorial:Drawing_shapes
|
|
|
686 |
|
|
|
687 |
var cp = getCoords(this, aCPx, aCPy);
|
|
|
688 |
var p = getCoords(this, aX, aY);
|
|
|
689 |
|
|
|
690 |
var cp1 = {
|
|
|
691 |
x: this.currentX_ + 2.0 / 3.0 * (cp.x - this.currentX_),
|
|
|
692 |
y: this.currentY_ + 2.0 / 3.0 * (cp.y - this.currentY_)
|
|
|
693 |
};
|
|
|
694 |
var cp2 = {
|
|
|
695 |
x: cp1.x + (p.x - this.currentX_) / 3.0,
|
|
|
696 |
y: cp1.y + (p.y - this.currentY_) / 3.0
|
|
|
697 |
};
|
|
|
698 |
|
|
|
699 |
bezierCurveTo(this, cp1, cp2, p);
|
|
|
700 |
};
|
|
|
701 |
|
|
|
702 |
contextPrototype.arc = function(aX, aY, aRadius,
|
|
|
703 |
aStartAngle, aEndAngle, aClockwise) {
|
|
|
704 |
aRadius *= Z;
|
|
|
705 |
var arcType = aClockwise ? 'at' : 'wa';
|
|
|
706 |
|
|
|
707 |
var xStart = aX + mc(aStartAngle) * aRadius - Z2;
|
|
|
708 |
var yStart = aY + ms(aStartAngle) * aRadius - Z2;
|
|
|
709 |
|
|
|
710 |
var xEnd = aX + mc(aEndAngle) * aRadius - Z2;
|
|
|
711 |
var yEnd = aY + ms(aEndAngle) * aRadius - Z2;
|
|
|
712 |
|
|
|
713 |
// IE won't render arches drawn counter clockwise if xStart == xEnd.
|
|
|
714 |
if (xStart == xEnd && !aClockwise) {
|
|
|
715 |
xStart += 0.125; // Offset xStart by 1/80 of a pixel. Use something
|
|
|
716 |
// that can be represented in binary
|
|
|
717 |
}
|
|
|
718 |
|
|
|
719 |
var p = getCoords(this, aX, aY);
|
|
|
720 |
var pStart = getCoords(this, xStart, yStart);
|
|
|
721 |
var pEnd = getCoords(this, xEnd, yEnd);
|
|
|
722 |
|
|
|
723 |
this.currentPath_.push({type: arcType,
|
|
|
724 |
x: p.x,
|
|
|
725 |
y: p.y,
|
|
|
726 |
radius: aRadius,
|
|
|
727 |
xStart: pStart.x,
|
|
|
728 |
yStart: pStart.y,
|
|
|
729 |
xEnd: pEnd.x,
|
|
|
730 |
yEnd: pEnd.y});
|
|
|
731 |
|
|
|
732 |
};
|
|
|
733 |
|
|
|
734 |
contextPrototype.rect = function(aX, aY, aWidth, aHeight) {
|
|
|
735 |
this.moveTo(aX, aY);
|
|
|
736 |
this.lineTo(aX + aWidth, aY);
|
|
|
737 |
this.lineTo(aX + aWidth, aY + aHeight);
|
|
|
738 |
this.lineTo(aX, aY + aHeight);
|
|
|
739 |
this.closePath();
|
|
|
740 |
};
|
|
|
741 |
|
|
|
742 |
contextPrototype.strokeRect = function(aX, aY, aWidth, aHeight) {
|
|
|
743 |
var oldPath = this.currentPath_;
|
|
|
744 |
this.beginPath();
|
|
|
745 |
|
|
|
746 |
this.moveTo(aX, aY);
|
|
|
747 |
this.lineTo(aX + aWidth, aY);
|
|
|
748 |
this.lineTo(aX + aWidth, aY + aHeight);
|
|
|
749 |
this.lineTo(aX, aY + aHeight);
|
|
|
750 |
this.closePath();
|
|
|
751 |
this.stroke();
|
|
|
752 |
|
|
|
753 |
this.currentPath_ = oldPath;
|
|
|
754 |
};
|
|
|
755 |
|
|
|
756 |
contextPrototype.fillRect = function(aX, aY, aWidth, aHeight) {
|
|
|
757 |
var oldPath = this.currentPath_;
|
|
|
758 |
this.beginPath();
|
|
|
759 |
|
|
|
760 |
this.moveTo(aX, aY);
|
|
|
761 |
this.lineTo(aX + aWidth, aY);
|
|
|
762 |
this.lineTo(aX + aWidth, aY + aHeight);
|
|
|
763 |
this.lineTo(aX, aY + aHeight);
|
|
|
764 |
this.closePath();
|
|
|
765 |
this.fill();
|
|
|
766 |
|
|
|
767 |
this.currentPath_ = oldPath;
|
|
|
768 |
};
|
|
|
769 |
|
|
|
770 |
contextPrototype.createLinearGradient = function(aX0, aY0, aX1, aY1) {
|
|
|
771 |
var gradient = new CanvasGradient_('gradient');
|
|
|
772 |
gradient.x0_ = aX0;
|
|
|
773 |
gradient.y0_ = aY0;
|
|
|
774 |
gradient.x1_ = aX1;
|
|
|
775 |
gradient.y1_ = aY1;
|
|
|
776 |
return gradient;
|
|
|
777 |
};
|
|
|
778 |
|
|
|
779 |
contextPrototype.createRadialGradient = function(aX0, aY0, aR0,
|
|
|
780 |
aX1, aY1, aR1) {
|
|
|
781 |
var gradient = new CanvasGradient_('gradientradial');
|
|
|
782 |
gradient.x0_ = aX0;
|
|
|
783 |
gradient.y0_ = aY0;
|
|
|
784 |
gradient.r0_ = aR0;
|
|
|
785 |
gradient.x1_ = aX1;
|
|
|
786 |
gradient.y1_ = aY1;
|
|
|
787 |
gradient.r1_ = aR1;
|
|
|
788 |
return gradient;
|
|
|
789 |
};
|
|
|
790 |
|
|
|
791 |
contextPrototype.drawImage = function(image, var_args) {
|
|
|
792 |
var dx, dy, dw, dh, sx, sy, sw, sh;
|
|
|
793 |
|
|
|
794 |
// to find the original width we overide the width and height
|
|
|
795 |
var oldRuntimeWidth = image.runtimeStyle.width;
|
|
|
796 |
var oldRuntimeHeight = image.runtimeStyle.height;
|
|
|
797 |
image.runtimeStyle.width = 'auto';
|
|
|
798 |
image.runtimeStyle.height = 'auto';
|
|
|
799 |
|
|
|
800 |
// get the original size
|
|
|
801 |
var w = image.width;
|
|
|
802 |
var h = image.height;
|
|
|
803 |
|
|
|
804 |
// and remove overides
|
|
|
805 |
image.runtimeStyle.width = oldRuntimeWidth;
|
|
|
806 |
image.runtimeStyle.height = oldRuntimeHeight;
|
|
|
807 |
|
|
|
808 |
if (arguments.length == 3) {
|
|
|
809 |
dx = arguments[1];
|
|
|
810 |
dy = arguments[2];
|
|
|
811 |
sx = sy = 0;
|
|
|
812 |
sw = dw = w;
|
|
|
813 |
sh = dh = h;
|
|
|
814 |
} else if (arguments.length == 5) {
|
|
|
815 |
dx = arguments[1];
|
|
|
816 |
dy = arguments[2];
|
|
|
817 |
dw = arguments[3];
|
|
|
818 |
dh = arguments[4];
|
|
|
819 |
sx = sy = 0;
|
|
|
820 |
sw = w;
|
|
|
821 |
sh = h;
|
|
|
822 |
} else if (arguments.length == 9) {
|
|
|
823 |
sx = arguments[1];
|
|
|
824 |
sy = arguments[2];
|
|
|
825 |
sw = arguments[3];
|
|
|
826 |
sh = arguments[4];
|
|
|
827 |
dx = arguments[5];
|
|
|
828 |
dy = arguments[6];
|
|
|
829 |
dw = arguments[7];
|
|
|
830 |
dh = arguments[8];
|
|
|
831 |
} else {
|
|
|
832 |
throw Error('Invalid number of arguments');
|
|
|
833 |
}
|
|
|
834 |
|
|
|
835 |
var d = getCoords(this, dx, dy);
|
|
|
836 |
|
|
|
837 |
var w2 = sw / 2;
|
|
|
838 |
var h2 = sh / 2;
|
|
|
839 |
|
|
|
840 |
var vmlStr = [];
|
|
|
841 |
|
|
|
842 |
var W = 10;
|
|
|
843 |
var H = 10;
|
|
|
844 |
|
|
|
845 |
// For some reason that I've now forgotten, using divs didn't work
|
|
|
846 |
vmlStr.push(' <g_vml_:group',
|
|
|
847 |
' coordsize="', Z * W, ',', Z * H, '"',
|
|
|
848 |
' coordorigin="0,0"' ,
|
|
|
849 |
' style="width:', W, 'px;height:', H, 'px;position:absolute;');
|
|
|
850 |
|
|
|
851 |
// If filters are necessary (rotation exists), create them
|
|
|
852 |
// filters are bog-slow, so only create them if abbsolutely necessary
|
|
|
853 |
// The following check doesn't account for skews (which don't exist
|
|
|
854 |
// in the canvas spec (yet) anyway.
|
|
|
855 |
|
|
|
856 |
if (this.m_[0][0] != 1 || this.m_[0][1] ||
|
|
|
857 |
this.m_[1][1] != 1 || this.m_[1][0]) {
|
|
|
858 |
var filter = [];
|
|
|
859 |
|
|
|
860 |
// Note the 12/21 reversal
|
|
|
861 |
filter.push('M11=', this.m_[0][0], ',',
|
|
|
862 |
'M12=', this.m_[1][0], ',',
|
|
|
863 |
'M21=', this.m_[0][1], ',',
|
|
|
864 |
'M22=', this.m_[1][1], ',',
|
|
|
865 |
'Dx=', mr(d.x / Z), ',',
|
|
|
866 |
'Dy=', mr(d.y / Z), '');
|
|
|
867 |
|
|
|
868 |
// Bounding box calculation (need to minimize displayed area so that
|
|
|
869 |
// filters don't waste time on unused pixels.
|
|
|
870 |
var max = d;
|
|
|
871 |
var c2 = getCoords(this, dx + dw, dy);
|
|
|
872 |
var c3 = getCoords(this, dx, dy + dh);
|
|
|
873 |
var c4 = getCoords(this, dx + dw, dy + dh);
|
|
|
874 |
|
|
|
875 |
max.x = m.max(max.x, c2.x, c3.x, c4.x);
|
|
|
876 |
max.y = m.max(max.y, c2.y, c3.y, c4.y);
|
|
|
877 |
|
|
|
878 |
vmlStr.push('padding:0 ', mr(max.x / Z), 'px ', mr(max.y / Z),
|
|
|
879 |
'px 0;filter:progid:DXImageTransform.Microsoft.Matrix(',
|
|
|
880 |
filter.join(''), ", sizingmethod='clip');");
|
|
|
881 |
|
|
|
882 |
} else {
|
|
|
883 |
vmlStr.push('top:', mr(d.y / Z), 'px;left:', mr(d.x / Z), 'px;');
|
|
|
884 |
}
|
|
|
885 |
|
|
|
886 |
vmlStr.push(' ">' ,
|
|
|
887 |
'<g_vml_:image src="', image.src, '"',
|
|
|
888 |
' style="width:', Z * dw, 'px;',
|
|
|
889 |
' height:', Z * dh, 'px"',
|
|
|
890 |
' cropleft="', sx / w, '"',
|
|
|
891 |
' croptop="', sy / h, '"',
|
|
|
892 |
' cropright="', (w - sx - sw) / w, '"',
|
|
|
893 |
' cropbottom="', (h - sy - sh) / h, '"',
|
|
|
894 |
' />',
|
|
|
895 |
'</g_vml_:group>');
|
|
|
896 |
|
|
|
897 |
this.element_.insertAdjacentHTML('BeforeEnd', vmlStr.join(''));
|
|
|
898 |
};
|
|
|
899 |
|
|
|
900 |
contextPrototype.stroke = function(aFill) {
|
|
|
901 |
var lineStr = [];
|
|
|
902 |
var lineOpen = false;
|
|
|
903 |
|
|
|
904 |
var W = 10;
|
|
|
905 |
var H = 10;
|
|
|
906 |
|
|
|
907 |
lineStr.push('<g_vml_:shape',
|
|
|
908 |
' filled="', !!aFill, '"',
|
|
|
909 |
' style="position:absolute;width:', W, 'px;height:', H, 'px;"',
|
|
|
910 |
' coordorigin="0,0"',
|
|
|
911 |
' coordsize="', Z * W, ',', Z * H, '"',
|
|
|
912 |
' stroked="', !aFill, '"',
|
|
|
913 |
' path="');
|
|
|
914 |
|
|
|
915 |
var newSeq = false;
|
|
|
916 |
var min = {x: null, y: null};
|
|
|
917 |
var max = {x: null, y: null};
|
|
|
918 |
|
|
|
919 |
for (var i = 0; i < this.currentPath_.length; i++) {
|
|
|
920 |
var p = this.currentPath_[i];
|
|
|
921 |
var c;
|
|
|
922 |
|
|
|
923 |
switch (p.type) {
|
|
|
924 |
case 'moveTo':
|
|
|
925 |
c = p;
|
|
|
926 |
lineStr.push(' m ', mr(p.x), ',', mr(p.y));
|
|
|
927 |
break;
|
|
|
928 |
case 'lineTo':
|
|
|
929 |
lineStr.push(' l ', mr(p.x), ',', mr(p.y));
|
|
|
930 |
break;
|
|
|
931 |
case 'close':
|
|
|
932 |
lineStr.push(' x ');
|
|
|
933 |
p = null;
|
|
|
934 |
break;
|
|
|
935 |
case 'bezierCurveTo':
|
|
|
936 |
lineStr.push(' c ',
|
|
|
937 |
mr(p.cp1x), ',', mr(p.cp1y), ',',
|
|
|
938 |
mr(p.cp2x), ',', mr(p.cp2y), ',',
|
|
|
939 |
mr(p.x), ',', mr(p.y));
|
|
|
940 |
break;
|
|
|
941 |
case 'at':
|
|
|
942 |
case 'wa':
|
|
|
943 |
lineStr.push(' ', p.type, ' ',
|
|
|
944 |
mr(p.x - this.arcScaleX_ * p.radius), ',',
|
|
|
945 |
mr(p.y - this.arcScaleY_ * p.radius), ' ',
|
|
|
946 |
mr(p.x + this.arcScaleX_ * p.radius), ',',
|
|
|
947 |
mr(p.y + this.arcScaleY_ * p.radius), ' ',
|
|
|
948 |
mr(p.xStart), ',', mr(p.yStart), ' ',
|
|
|
949 |
mr(p.xEnd), ',', mr(p.yEnd));
|
|
|
950 |
break;
|
|
|
951 |
}
|
|
|
952 |
|
|
|
953 |
|
|
|
954 |
// TODO: Following is broken for curves due to
|
|
|
955 |
// move to proper paths.
|
|
|
956 |
|
|
|
957 |
// Figure out dimensions so we can do gradient fills
|
|
|
958 |
// properly
|
|
|
959 |
if (p) {
|
|
|
960 |
if (min.x == null || p.x < min.x) {
|
|
|
961 |
min.x = p.x;
|
|
|
962 |
}
|
|
|
963 |
if (max.x == null || p.x > max.x) {
|
|
|
964 |
max.x = p.x;
|
|
|
965 |
}
|
|
|
966 |
if (min.y == null || p.y < min.y) {
|
|
|
967 |
min.y = p.y;
|
|
|
968 |
}
|
|
|
969 |
if (max.y == null || p.y > max.y) {
|
|
|
970 |
max.y = p.y;
|
|
|
971 |
}
|
|
|
972 |
}
|
|
|
973 |
}
|
|
|
974 |
lineStr.push(' ">');
|
|
|
975 |
|
|
|
976 |
if (!aFill) {
|
|
|
977 |
appendStroke(this, lineStr);
|
|
|
978 |
} else {
|
|
|
979 |
appendFill(this, lineStr, min, max);
|
|
|
980 |
}
|
|
|
981 |
|
|
|
982 |
lineStr.push('</g_vml_:shape>');
|
|
|
983 |
|
|
|
984 |
this.element_.insertAdjacentHTML('beforeEnd', lineStr.join(''));
|
|
|
985 |
};
|
|
|
986 |
|
|
|
987 |
function appendStroke(ctx, lineStr) {
|
|
|
988 |
var a = processStyle(ctx.strokeStyle);
|
|
|
989 |
var color = a.color;
|
|
|
990 |
var opacity = a.alpha * ctx.globalAlpha;
|
|
|
991 |
var lineWidth = ctx.lineScale_ * ctx.lineWidth;
|
|
|
992 |
|
|
|
993 |
// VML cannot correctly render a line if the width is less than 1px.
|
|
|
994 |
// In that case, we dilute the color to make the line look thinner.
|
|
|
995 |
if (lineWidth < 1) {
|
|
|
996 |
opacity *= lineWidth;
|
|
|
997 |
}
|
|
|
998 |
|
|
|
999 |
lineStr.push(
|
|
|
1000 |
'<g_vml_:stroke',
|
|
|
1001 |
' opacity="', opacity, '"',
|
|
|
1002 |
' joinstyle="', ctx.lineJoin, '"',
|
|
|
1003 |
' miterlimit="', ctx.miterLimit, '"',
|
|
|
1004 |
' endcap="', processLineCap(ctx.lineCap), '"',
|
|
|
1005 |
' weight="', lineWidth, 'px"',
|
|
|
1006 |
' color="', color, '" />'
|
|
|
1007 |
);
|
|
|
1008 |
}
|
|
|
1009 |
|
|
|
1010 |
function appendFill(ctx, lineStr, min, max) {
|
|
|
1011 |
var fillStyle = ctx.fillStyle;
|
|
|
1012 |
var arcScaleX = ctx.arcScaleX_;
|
|
|
1013 |
var arcScaleY = ctx.arcScaleY_;
|
|
|
1014 |
var width = max.x - min.x;
|
|
|
1015 |
var height = max.y - min.y;
|
|
|
1016 |
if (fillStyle instanceof CanvasGradient_) {
|
|
|
1017 |
// TODO: Gradients transformed with the transformation matrix.
|
|
|
1018 |
var angle = 0;
|
|
|
1019 |
var focus = {x: 0, y: 0};
|
|
|
1020 |
|
|
|
1021 |
// additional offset
|
|
|
1022 |
var shift = 0;
|
|
|
1023 |
// scale factor for offset
|
|
|
1024 |
var expansion = 1;
|
|
|
1025 |
|
|
|
1026 |
if (fillStyle.type_ == 'gradient') {
|
|
|
1027 |
var x0 = fillStyle.x0_ / arcScaleX;
|
|
|
1028 |
var y0 = fillStyle.y0_ / arcScaleY;
|
|
|
1029 |
var x1 = fillStyle.x1_ / arcScaleX;
|
|
|
1030 |
var y1 = fillStyle.y1_ / arcScaleY;
|
|
|
1031 |
var p0 = getCoords(ctx, x0, y0);
|
|
|
1032 |
var p1 = getCoords(ctx, x1, y1);
|
|
|
1033 |
var dx = p1.x - p0.x;
|
|
|
1034 |
var dy = p1.y - p0.y;
|
|
|
1035 |
angle = Math.atan2(dx, dy) * 180 / Math.PI;
|
|
|
1036 |
|
|
|
1037 |
// The angle should be a non-negative number.
|
|
|
1038 |
if (angle < 0) {
|
|
|
1039 |
angle += 360;
|
|
|
1040 |
}
|
|
|
1041 |
|
|
|
1042 |
// Very small angles produce an unexpected result because they are
|
|
|
1043 |
// converted to a scientific notation string.
|
|
|
1044 |
if (angle < 1e-6) {
|
|
|
1045 |
angle = 0;
|
|
|
1046 |
}
|
|
|
1047 |
} else {
|
|
|
1048 |
var p0 = getCoords(ctx, fillStyle.x0_, fillStyle.y0_);
|
|
|
1049 |
focus = {
|
|
|
1050 |
x: (p0.x - min.x) / width,
|
|
|
1051 |
y: (p0.y - min.y) / height
|
|
|
1052 |
};
|
|
|
1053 |
|
|
|
1054 |
width /= arcScaleX * Z;
|
|
|
1055 |
height /= arcScaleY * Z;
|
|
|
1056 |
var dimension = m.max(width, height);
|
|
|
1057 |
shift = 2 * fillStyle.r0_ / dimension;
|
|
|
1058 |
expansion = 2 * fillStyle.r1_ / dimension - shift;
|
|
|
1059 |
}
|
|
|
1060 |
|
|
|
1061 |
// We need to sort the color stops in ascending order by offset,
|
|
|
1062 |
// otherwise IE won't interpret it correctly.
|
|
|
1063 |
var stops = fillStyle.colors_;
|
|
|
1064 |
stops.sort(function(cs1, cs2) {
|
|
|
1065 |
return cs1.offset - cs2.offset;
|
|
|
1066 |
});
|
|
|
1067 |
|
|
|
1068 |
var length = stops.length;
|
|
|
1069 |
var color1 = stops[0].color;
|
|
|
1070 |
var color2 = stops[length - 1].color;
|
|
|
1071 |
var opacity1 = stops[0].alpha * ctx.globalAlpha;
|
|
|
1072 |
var opacity2 = stops[length - 1].alpha * ctx.globalAlpha;
|
|
|
1073 |
|
|
|
1074 |
var colors = [];
|
|
|
1075 |
for (var i = 0; i < length; i++) {
|
|
|
1076 |
var stop = stops[i];
|
|
|
1077 |
colors.push(stop.offset * expansion + shift + ' ' + stop.color);
|
|
|
1078 |
}
|
|
|
1079 |
|
|
|
1080 |
// When colors attribute is used, the meanings of opacity and o:opacity2
|
|
|
1081 |
// are reversed.
|
|
|
1082 |
lineStr.push('<g_vml_:fill type="', fillStyle.type_, '"',
|
|
|
1083 |
' method="none" focus="100%"',
|
|
|
1084 |
' color="', color1, '"',
|
|
|
1085 |
' color2="', color2, '"',
|
|
|
1086 |
' colors="', colors.join(','), '"',
|
|
|
1087 |
' opacity="', opacity2, '"',
|
|
|
1088 |
' g_o_:opacity2="', opacity1, '"',
|
|
|
1089 |
' angle="', angle, '"',
|
|
|
1090 |
' focusposition="', focus.x, ',', focus.y, '" />');
|
|
|
1091 |
} else if (fillStyle instanceof CanvasPattern_) {
|
|
|
1092 |
if (width && height) {
|
|
|
1093 |
var deltaLeft = -min.x;
|
|
|
1094 |
var deltaTop = -min.y;
|
|
|
1095 |
lineStr.push('<g_vml_:fill',
|
|
|
1096 |
' position="',
|
|
|
1097 |
deltaLeft / width * arcScaleX * arcScaleX, ',',
|
|
|
1098 |
deltaTop / height * arcScaleY * arcScaleY, '"',
|
|
|
1099 |
' type="tile"',
|
|
|
1100 |
// TODO: Figure out the correct size to fit the scale.
|
|
|
1101 |
//' size="', w, 'px ', h, 'px"',
|
|
|
1102 |
' src="', fillStyle.src_, '" />');
|
|
|
1103 |
}
|
|
|
1104 |
} else {
|
|
|
1105 |
var a = processStyle(ctx.fillStyle);
|
|
|
1106 |
var color = a.color;
|
|
|
1107 |
var opacity = a.alpha * ctx.globalAlpha;
|
|
|
1108 |
lineStr.push('<g_vml_:fill color="', color, '" opacity="', opacity,
|
|
|
1109 |
'" />');
|
|
|
1110 |
}
|
|
|
1111 |
}
|
|
|
1112 |
|
|
|
1113 |
contextPrototype.fill = function() {
|
|
|
1114 |
this.stroke(true);
|
|
|
1115 |
};
|
|
|
1116 |
|
|
|
1117 |
contextPrototype.closePath = function() {
|
|
|
1118 |
this.currentPath_.push({type: 'close'});
|
|
|
1119 |
};
|
|
|
1120 |
|
|
|
1121 |
function getCoords(ctx, aX, aY) {
|
|
|
1122 |
var m = ctx.m_;
|
|
|
1123 |
return {
|
|
|
1124 |
x: Z * (aX * m[0][0] + aY * m[1][0] + m[2][0]) - Z2,
|
|
|
1125 |
y: Z * (aX * m[0][1] + aY * m[1][1] + m[2][1]) - Z2
|
|
|
1126 |
};
|
|
|
1127 |
};
|
|
|
1128 |
|
|
|
1129 |
contextPrototype.save = function() {
|
|
|
1130 |
var o = {};
|
|
|
1131 |
copyState(this, o);
|
|
|
1132 |
this.aStack_.push(o);
|
|
|
1133 |
this.mStack_.push(this.m_);
|
|
|
1134 |
this.m_ = matrixMultiply(createMatrixIdentity(), this.m_);
|
|
|
1135 |
};
|
|
|
1136 |
|
|
|
1137 |
contextPrototype.restore = function() {
|
|
|
1138 |
if (this.aStack_.length) {
|
|
|
1139 |
copyState(this.aStack_.pop(), this);
|
|
|
1140 |
this.m_ = this.mStack_.pop();
|
|
|
1141 |
}
|
|
|
1142 |
};
|
|
|
1143 |
|
|
|
1144 |
function matrixIsFinite(m) {
|
|
|
1145 |
return isFinite(m[0][0]) && isFinite(m[0][1]) &&
|
|
|
1146 |
isFinite(m[1][0]) && isFinite(m[1][1]) &&
|
|
|
1147 |
isFinite(m[2][0]) && isFinite(m[2][1]);
|
|
|
1148 |
}
|
|
|
1149 |
|
|
|
1150 |
function setM(ctx, m, updateLineScale) {
|
|
|
1151 |
if (!matrixIsFinite(m)) {
|
|
|
1152 |
return;
|
|
|
1153 |
}
|
|
|
1154 |
ctx.m_ = m;
|
|
|
1155 |
|
|
|
1156 |
if (updateLineScale) {
|
|
|
1157 |
// Get the line scale.
|
|
|
1158 |
// Determinant of this.m_ means how much the area is enlarged by the
|
|
|
1159 |
// transformation. So its square root can be used as a scale factor
|
|
|
1160 |
// for width.
|
|
|
1161 |
var det = m[0][0] * m[1][1] - m[0][1] * m[1][0];
|
|
|
1162 |
ctx.lineScale_ = sqrt(abs(det));
|
|
|
1163 |
}
|
|
|
1164 |
}
|
|
|
1165 |
|
|
|
1166 |
contextPrototype.translate = function(aX, aY) {
|
|
|
1167 |
var m1 = [
|
|
|
1168 |
[1, 0, 0],
|
|
|
1169 |
[0, 1, 0],
|
|
|
1170 |
[aX, aY, 1]
|
|
|
1171 |
];
|
|
|
1172 |
|
|
|
1173 |
setM(this, matrixMultiply(m1, this.m_), false);
|
|
|
1174 |
};
|
|
|
1175 |
|
|
|
1176 |
contextPrototype.rotate = function(aRot) {
|
|
|
1177 |
var c = mc(aRot);
|
|
|
1178 |
var s = ms(aRot);
|
|
|
1179 |
|
|
|
1180 |
var m1 = [
|
|
|
1181 |
[c, s, 0],
|
|
|
1182 |
[-s, c, 0],
|
|
|
1183 |
[0, 0, 1]
|
|
|
1184 |
];
|
|
|
1185 |
|
|
|
1186 |
setM(this, matrixMultiply(m1, this.m_), false);
|
|
|
1187 |
};
|
|
|
1188 |
|
|
|
1189 |
contextPrototype.scale = function(aX, aY) {
|
|
|
1190 |
this.arcScaleX_ *= aX;
|
|
|
1191 |
this.arcScaleY_ *= aY;
|
|
|
1192 |
var m1 = [
|
|
|
1193 |
[aX, 0, 0],
|
|
|
1194 |
[0, aY, 0],
|
|
|
1195 |
[0, 0, 1]
|
|
|
1196 |
];
|
|
|
1197 |
|
|
|
1198 |
setM(this, matrixMultiply(m1, this.m_), true);
|
|
|
1199 |
};
|
|
|
1200 |
|
|
|
1201 |
contextPrototype.transform = function(m11, m12, m21, m22, dx, dy) {
|
|
|
1202 |
var m1 = [
|
|
|
1203 |
[m11, m12, 0],
|
|
|
1204 |
[m21, m22, 0],
|
|
|
1205 |
[dx, dy, 1]
|
|
|
1206 |
];
|
|
|
1207 |
|
|
|
1208 |
setM(this, matrixMultiply(m1, this.m_), true);
|
|
|
1209 |
};
|
|
|
1210 |
|
|
|
1211 |
contextPrototype.setTransform = function(m11, m12, m21, m22, dx, dy) {
|
|
|
1212 |
var m = [
|
|
|
1213 |
[m11, m12, 0],
|
|
|
1214 |
[m21, m22, 0],
|
|
|
1215 |
[dx, dy, 1]
|
|
|
1216 |
];
|
|
|
1217 |
|
|
|
1218 |
setM(this, m, true);
|
|
|
1219 |
};
|
|
|
1220 |
|
|
|
1221 |
/**
|
|
|
1222 |
* The text drawing function.
|
|
|
1223 |
* The maxWidth argument isn't taken in account, since no browser supports
|
|
|
1224 |
* it yet.
|
|
|
1225 |
*/
|
|
|
1226 |
contextPrototype.drawText_ = function(text, x, y, maxWidth, stroke) {
|
|
|
1227 |
var m = this.m_,
|
|
|
1228 |
delta = 1000,
|
|
|
1229 |
left = 0,
|
|
|
1230 |
right = delta,
|
|
|
1231 |
offset = {x: 0, y: 0},
|
|
|
1232 |
lineStr = [];
|
|
|
1233 |
|
|
|
1234 |
var fontStyle = getComputedStyle(processFontStyle(this.font), this.element_);
|
|
|
1235 |
|
|
|
1236 |
var fontStyleString = buildStyle(fontStyle);
|
|
|
1237 |
|
|
|
1238 |
var elementStyle = this.element_.currentStyle;
|
|
|
1239 |
var textAlign = this.textAlign.toLowerCase();
|
|
|
1240 |
switch (textAlign) {
|
|
|
1241 |
case 'left':
|
|
|
1242 |
case 'center':
|
|
|
1243 |
case 'right':
|
|
|
1244 |
break;
|
|
|
1245 |
case 'end':
|
|
|
1246 |
textAlign = elementStyle.direction == 'ltr' ? 'right' : 'left';
|
|
|
1247 |
break;
|
|
|
1248 |
case 'start':
|
|
|
1249 |
textAlign = elementStyle.direction == 'rtl' ? 'right' : 'left';
|
|
|
1250 |
break;
|
|
|
1251 |
default:
|
|
|
1252 |
textAlign = 'left';
|
|
|
1253 |
}
|
|
|
1254 |
|
|
|
1255 |
// 1.75 is an arbitrary number, as there is no info about the text baseline
|
|
|
1256 |
switch (this.textBaseline) {
|
|
|
1257 |
case 'hanging':
|
|
|
1258 |
case 'top':
|
|
|
1259 |
offset.y = fontStyle.size / 1.75;
|
|
|
1260 |
break;
|
|
|
1261 |
case 'middle':
|
|
|
1262 |
break;
|
|
|
1263 |
default:
|
|
|
1264 |
case null:
|
|
|
1265 |
case 'alphabetic':
|
|
|
1266 |
case 'ideographic':
|
|
|
1267 |
case 'bottom':
|
|
|
1268 |
offset.y = -fontStyle.size / 2.25;
|
|
|
1269 |
break;
|
|
|
1270 |
}
|
|
|
1271 |
|
|
|
1272 |
switch(textAlign) {
|
|
|
1273 |
case 'right':
|
|
|
1274 |
left = delta;
|
|
|
1275 |
right = 0.05;
|
|
|
1276 |
break;
|
|
|
1277 |
case 'center':
|
|
|
1278 |
left = right = delta / 2;
|
|
|
1279 |
break;
|
|
|
1280 |
}
|
|
|
1281 |
|
|
|
1282 |
var d = getCoords(this, x + offset.x, y + offset.y);
|
|
|
1283 |
|
|
|
1284 |
lineStr.push('<g_vml_:line from="', -left ,' 0" to="', right ,' 0.05" ',
|
|
|
1285 |
' coordsize="100 100" coordorigin="0 0"',
|
|
|
1286 |
' filled="', !stroke, '" stroked="', !!stroke,
|
|
|
1287 |
'" style="position:absolute;width:1px;height:1px;">');
|
|
|
1288 |
|
|
|
1289 |
if (stroke) {
|
|
|
1290 |
appendStroke(this, lineStr);
|
|
|
1291 |
} else {
|
|
|
1292 |
// TODO: Fix the min and max params.
|
|
|
1293 |
appendFill(this, lineStr, {x: -left, y: 0},
|
|
|
1294 |
{x: right, y: fontStyle.size});
|
|
|
1295 |
}
|
|
|
1296 |
|
|
|
1297 |
var skewM = m[0][0].toFixed(3) + ',' + m[1][0].toFixed(3) + ',' +
|
|
|
1298 |
m[0][1].toFixed(3) + ',' + m[1][1].toFixed(3) + ',0,0';
|
|
|
1299 |
|
|
|
1300 |
var skewOffset = mr(d.x / Z + 1 - m[0][0]) + ',' + mr(d.y / Z - 2 * m[1][0]);
|
|
|
1301 |
|
|
|
1302 |
|
|
|
1303 |
lineStr.push('<g_vml_:skew on="t" matrix="', skewM ,'" ',
|
|
|
1304 |
' offset="', skewOffset, '" origin="', left ,' 0" />',
|
|
|
1305 |
'<g_vml_:path textpathok="true" />',
|
|
|
1306 |
'<g_vml_:textpath on="true" string="',
|
|
|
1307 |
encodeHtmlAttribute(text),
|
|
|
1308 |
'" style="v-text-align:', textAlign,
|
|
|
1309 |
';font:', encodeHtmlAttribute(fontStyleString),
|
|
|
1310 |
'" /></g_vml_:line>');
|
|
|
1311 |
|
|
|
1312 |
this.element_.insertAdjacentHTML('beforeEnd', lineStr.join(''));
|
|
|
1313 |
};
|
|
|
1314 |
|
|
|
1315 |
contextPrototype.fillText = function(text, x, y, maxWidth) {
|
|
|
1316 |
this.drawText_(text, x, y, maxWidth, false);
|
|
|
1317 |
};
|
|
|
1318 |
|
|
|
1319 |
contextPrototype.strokeText = function(text, x, y, maxWidth) {
|
|
|
1320 |
this.drawText_(text, x, y, maxWidth, true);
|
|
|
1321 |
};
|
|
|
1322 |
|
|
|
1323 |
contextPrototype.measureText = function(text) {
|
|
|
1324 |
if (!this.textMeasureEl_) {
|
|
|
1325 |
var s = '<span style="position:absolute;' +
|
|
|
1326 |
'top:-20000px;left:0;padding:0;margin:0;border:none;' +
|
|
|
1327 |
'white-space:pre;"></span>';
|
|
|
1328 |
this.element_.insertAdjacentHTML('beforeEnd', s);
|
|
|
1329 |
this.textMeasureEl_ = this.element_.lastChild;
|
|
|
1330 |
}
|
|
|
1331 |
var doc = this.element_.ownerDocument;
|
|
|
1332 |
this.textMeasureEl_.innerHTML = '';
|
|
|
1333 |
this.textMeasureEl_.style.font = this.font;
|
|
|
1334 |
// Don't use innerHTML or innerText because they allow markup/whitespace.
|
|
|
1335 |
this.textMeasureEl_.appendChild(doc.createTextNode(text));
|
|
|
1336 |
return {width: this.textMeasureEl_.offsetWidth};
|
|
|
1337 |
};
|
|
|
1338 |
|
|
|
1339 |
/******** STUBS ********/
|
|
|
1340 |
contextPrototype.clip = function() {
|
|
|
1341 |
// TODO: Implement
|
|
|
1342 |
};
|
|
|
1343 |
|
|
|
1344 |
contextPrototype.arcTo = function() {
|
|
|
1345 |
// TODO: Implement
|
|
|
1346 |
};
|
|
|
1347 |
|
|
|
1348 |
contextPrototype.createPattern = function(image, repetition) {
|
|
|
1349 |
return new CanvasPattern_(image, repetition);
|
|
|
1350 |
};
|
|
|
1351 |
|
|
|
1352 |
// Gradient / Pattern Stubs
|
|
|
1353 |
function CanvasGradient_(aType) {
|
|
|
1354 |
this.type_ = aType;
|
|
|
1355 |
this.x0_ = 0;
|
|
|
1356 |
this.y0_ = 0;
|
|
|
1357 |
this.r0_ = 0;
|
|
|
1358 |
this.x1_ = 0;
|
|
|
1359 |
this.y1_ = 0;
|
|
|
1360 |
this.r1_ = 0;
|
|
|
1361 |
this.colors_ = [];
|
|
|
1362 |
}
|
|
|
1363 |
|
|
|
1364 |
CanvasGradient_.prototype.addColorStop = function(aOffset, aColor) {
|
|
|
1365 |
aColor = processStyle(aColor);
|
|
|
1366 |
this.colors_.push({offset: aOffset,
|
|
|
1367 |
color: aColor.color,
|
|
|
1368 |
alpha: aColor.alpha});
|
|
|
1369 |
};
|
|
|
1370 |
|
|
|
1371 |
function CanvasPattern_(image, repetition) {
|
|
|
1372 |
assertImageIsValid(image);
|
|
|
1373 |
switch (repetition) {
|
|
|
1374 |
case 'repeat':
|
|
|
1375 |
case null:
|
|
|
1376 |
case '':
|
|
|
1377 |
this.repetition_ = 'repeat';
|
|
|
1378 |
break;
|
|
|
1379 |
case 'repeat-x':
|
|
|
1380 |
case 'repeat-y':
|
|
|
1381 |
case 'no-repeat':
|
|
|
1382 |
this.repetition_ = repetition;
|
|
|
1383 |
break;
|
|
|
1384 |
default:
|
|
|
1385 |
throwException('SYNTAX_ERR');
|
|
|
1386 |
}
|
|
|
1387 |
|
|
|
1388 |
this.src_ = image.src;
|
|
|
1389 |
this.width_ = image.width;
|
|
|
1390 |
this.height_ = image.height;
|
|
|
1391 |
}
|
|
|
1392 |
|
|
|
1393 |
function throwException(s) {
|
|
|
1394 |
throw new DOMException_(s);
|
|
|
1395 |
}
|
|
|
1396 |
|
|
|
1397 |
function assertImageIsValid(img) {
|
|
|
1398 |
if (!img || img.nodeType != 1 || img.tagName != 'IMG') {
|
|
|
1399 |
throwException('TYPE_MISMATCH_ERR');
|
|
|
1400 |
}
|
|
|
1401 |
if (img.readyState != 'complete') {
|
|
|
1402 |
throwException('INVALID_STATE_ERR');
|
|
|
1403 |
}
|
|
|
1404 |
}
|
|
|
1405 |
|
|
|
1406 |
function DOMException_(s) {
|
|
|
1407 |
this.code = this[s];
|
|
|
1408 |
this.message = s +': DOM Exception ' + this.code;
|
|
|
1409 |
}
|
|
|
1410 |
var p = DOMException_.prototype = new Error;
|
|
|
1411 |
p.INDEX_SIZE_ERR = 1;
|
|
|
1412 |
p.DOMSTRING_SIZE_ERR = 2;
|
|
|
1413 |
p.HIERARCHY_REQUEST_ERR = 3;
|
|
|
1414 |
p.WRONG_DOCUMENT_ERR = 4;
|
|
|
1415 |
p.INVALID_CHARACTER_ERR = 5;
|
|
|
1416 |
p.NO_DATA_ALLOWED_ERR = 6;
|
|
|
1417 |
p.NO_MODIFICATION_ALLOWED_ERR = 7;
|
|
|
1418 |
p.NOT_FOUND_ERR = 8;
|
|
|
1419 |
p.NOT_SUPPORTED_ERR = 9;
|
|
|
1420 |
p.INUSE_ATTRIBUTE_ERR = 10;
|
|
|
1421 |
p.INVALID_STATE_ERR = 11;
|
|
|
1422 |
p.SYNTAX_ERR = 12;
|
|
|
1423 |
p.INVALID_MODIFICATION_ERR = 13;
|
|
|
1424 |
p.NAMESPACE_ERR = 14;
|
|
|
1425 |
p.INVALID_ACCESS_ERR = 15;
|
|
|
1426 |
p.VALIDATION_ERR = 16;
|
|
|
1427 |
p.TYPE_MISMATCH_ERR = 17;
|
|
|
1428 |
|
|
|
1429 |
// set up externs
|
|
|
1430 |
G_vmlCanvasManager = G_vmlCanvasManager_;
|
|
|
1431 |
CanvasRenderingContext2D = CanvasRenderingContext2D_;
|
|
|
1432 |
CanvasGradient = CanvasGradient_;
|
|
|
1433 |
CanvasPattern = CanvasPattern_;
|
|
|
1434 |
DOMException = DOMException_;
|
|
|
1435 |
G_vmlCanvasManager._version = 888;
|
|
|
1436 |
})();
|
|
|
1437 |
|
|
|
1438 |
} // if
|