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Don't use Uint32Array for IE compatibility

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This commit is contained in:
Frederic Junod
2014-03-06 13:28:18 +01:00
parent c32d8a2e53
commit 3bc0a6e6f0
1 changed files with 10 additions and 12 deletions
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22
src/ol/layer/heatmaplayer.js
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@@ -34,7 +34,7 @@ ol.layer.Heatmap = function(opt_options) {
/**
* @private
* @type {Uint32Array}
* @type {Uint8ClampedArray}
*/
this.gradient_ = null;
@@ -89,7 +89,7 @@ ol.layer.Heatmap.DEFAULT_GRADIENT = ['#00f', '#0ff', '#0f0', '#ff0', '#f00'];
/**
* @param {Array.<string>} colors
* @return {Uint32Array}
* @return {Uint8ClampedArray}
* @private
*/
ol.layer.Heatmap.createGradient_ = function(colors) {
@@ -108,11 +108,8 @@ ol.layer.Heatmap.createGradient_ = function(colors) {
context.fillStyle = gradient;
context.fillRect(0, 0, width, height);
var imageData = context.getImageData(0, 0, width, height).data;
for (var i = 0, ii = imageData.length; i < ii; i += 4) {
imageData[i + 3] = i / 4;
}
return new Uint32Array(imageData.buffer);
return context.getImageData(0, 0, width, height).data;
};
@@ -172,13 +169,14 @@ ol.layer.Heatmap.prototype.handleRender_ = function(event) {
var context = event.context;
var canvas = context.canvas;
var image = context.getImageData(0, 0, canvas.width, canvas.height);
var view32 = new Uint32Array(image.data.buffer);
var view8 = image.data;
var i, ii, alpha;
for (i = 0, ii = view32.length; i < ii; ++i) {
alpha = view8[4 * i + 3];
var i, ii, alpha, offset;
for (i = 0, ii = view8.length; i < ii; i += 4) {
alpha = view8[i + 3] * 4;
if (alpha) {
view32[i] = this.gradient_[alpha];
view8[i] = this.gradient_[alpha];
view8[i + 1] = this.gradient_[alpha + 1];
view8[i + 2] = this.gradient_[alpha + 2];
}
}
context.putImageData(image, 0, 0);