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Add ol.dom.createCanvasContext2D function

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This commit is contained in:
Frederic Junod
2014-04-01 16:25:02 +02:00
parent 0b21c6bea7
commit 55de0a54b9
12 changed files with 63 additions and 118 deletions
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src/ol/style/iconstyle.js
+4 -15
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@@ -7,11 +7,10 @@ goog.provide('ol.style.IconImageCache');
goog.require('goog.array');
goog.require('goog.asserts');
goog.require('goog.dom');
goog.require('goog.dom.TagName');
goog.require('goog.events');
goog.require('goog.events.EventTarget');
goog.require('goog.events.EventType');
goog.require('ol.dom');
goog.require('ol.style.Image');
goog.require('ol.style.ImageState');
@@ -312,12 +311,7 @@ ol.style.IconImage_.get = function(src, crossOrigin) {
* @private
*/
ol.style.IconImage_.prototype.determineTainting_ = function() {
var canvas = /** @type {HTMLCanvasElement} */
(goog.dom.createElement(goog.dom.TagName.CANVAS));
canvas.width = 1;
canvas.height = 1;
var context = /** @type {CanvasRenderingContext2D} */
(canvas.getContext('2d'));
var context = ol.dom.createCanvasContext2D(1, 1);
context.drawImage(this.image_, 0, 0);
try {
context.getImageData(0, 0, 1, 1);
@@ -381,16 +375,11 @@ ol.style.IconImage_.prototype.getImageState = function() {
ol.style.IconImage_.prototype.getHitDetectionImage = function(pixelRatio) {
if (goog.isNull(this.hitDetectionImage_)) {
if (this.tainting_) {
var canvas = /** @type {HTMLCanvasElement} */
(goog.dom.createElement(goog.dom.TagName.CANVAS));
var width = this.size_[0];
var height = this.size_[1];
canvas.width = width;
canvas.height = height;
var context = /** @type {CanvasRenderingContext2D} */
(canvas.getContext('2d'));
var context = ol.dom.createCanvasContext2D(width, height);
context.fillRect(0, 0, width, height);
this.hitDetectionImage_ = canvas;
this.hitDetectionImage_ = context.canvas;
} else {
this.hitDetectionImage_ = this.image_;
}