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Fix bug that copying image buffer to ImageData fails in IE10

This commit is contained in:
Jungkook Park 2016-02-17 20:14:54 +09:00
parent 670dbddb54
commit dd75a3e77f
1 changed files with 23 additions and 4 deletions
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21
include/display.js
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@ -15,13 +15,23 @@ var Display;
(function () {
"use strict";
var SUPPORTS_UINT8CLAMPEDARRAY = false;
try {
new Uint8ClampedArray(1);
SUPPORTS_UINT8CLAMPEDARRAY = true;
} catch (ex) {
// ignore failure
}
var SUPPORTS_IMAGEDATA_CONSTRUCTOR = false;
if (SUPPORTS_UINT8CLAMPEDARRAY) {
try {
new ImageData(new Uint8ClampedArray(1), 1, 1);
SUPPORTS_IMAGEDATA_CONSTRUCTOR = true;
} catch (ex) {
// ignore failure
}
}
Display = function (defaults) {
this._drawCtx = null;
@ -706,9 +716,18 @@ var Display;
var img;
if (SUPPORTS_IMAGEDATA_CONSTRUCTOR) {
img = new ImageData(new Uint8ClampedArray(arr.buffer, arr.byteOffset, width * height * 4), width, height);
} else {
} else if (SUPPORTS_UINT8CLAMPEDARRAY) {
img = this._drawCtx.createImageData(width, height);
img.data.set(new Uint8ClampedArray(arr.buffer, arr.byteOffset, width * height * 4));
} else {
img = this._drawCtx.createImageData(width, height);
var data = img.data;
for (var i = 0, j = offset; i < width * height * 4; i += 4, j += 4) {
data[i] = arr[j];
data[i + 1] = arr[j + 1];
data[i + 2] = arr[j + 2];
data[i + 3] = 255; // Alpha
}
}
this._drawCtx.putImageData(img, x - vx, y - vy);
},