security-and-privacy/CanvasBlocker
security-and-privacy/CanvasBlocker
1
0
Fork 0
mirror of https://github.com/kkapsner/CanvasBlocker synced 2025-01-18 17:38:46 +01:00
Code Releases Activity

Improved performance for getImageData.

Browse Source
This commit is contained in:
kkapsner 2016-12-03 17:29:30 +01:00
parent 7b7583afe0
commit 0eeaf84826
1 changed files with 3 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
lib/modifiedAPI.js
View File

@ -191,24 +191,17 @@
var maxSize = prefs("maxFakeSize") || Number.POSITIVE_INFINITY; var maxSize = prefs("maxFakeSize") || Number.POSITIVE_INFINITY;
return function getImageData(sx, sy, sw, sh){ return function getImageData(sx, sy, sw, sh){
var window = getWindow(this.canvas); var window = getWindow(this.canvas);
var context;
if (sw * sh > maxSize){ if (sw * sh > maxSize){
return original.call(this, sx, sy, sw, sh); return original.apply(this, window.Array.from(arguments));
} }
else { else {
notify("fakedReadout"); notify("fakedReadout");
context = window.HTMLCanvasElement.prototype.getContext.call( var context = window.HTMLCanvasElement.prototype.getContext.call(
getFakeCanvas(window, this.canvas), getFakeCanvas(window, this.canvas),
"2d" "2d"
); );
return original.apply(context, window.Array.from(arguments));
} }
var data = window.CanvasRenderingContext2D.prototype.getImageData.apply(context, arguments).data;
var imageData = new window.wrappedJSObject.ImageData(sw, sh);
for (var i = 0, l = data.length; i < l; i += 1){
imageData.data[i] = data[i];
}
return imageData;
}; };
} }
}, },