bitmapdata.lock error

If you want good performance in jeash, you should be caching your bitmaps and avoid bitmapdata - bitmapdata is good for low-level access to pixel data, but this is slow if you are calling copypixels for every frame.

Create a Bunny in separate Bitmaps and move their x and y co-ordinates. Although this creates overhead with the number of objects, it will also create separate canvas tags in the HTML, and if you have a good browser and OS, these tags will benefit from GPU acceleration.

Hey, thanks for the response. I will do some more tests using the display list.

Thanks,

p.s you didn't mention anything about the error.

Was there an error message or did it simply timeout ?

In the development version, if the bitmapdata is locked, copyPixels is done completely in software pixel-by-pixel, which has the best compatibility with flash but is not useful in most cases. If the bitmapdata is not locked, copyPixels will ignore some arguments and use a straight canvas drawImage onto the target HTML canvas.

I was not sure whether to leave the software mode in, it's possible that I will pull it out for the next release.

Hi,

Yes it throws an error on each loop: http://dl.dropbox.com/u/698268/error.png. Here is the code for my update:

                        canvasData.lock();
   canvasData.fillRect(rect, 0xFFFFFF);
   for (i in 0...numBunnies)
   {
    var b:Bunny = bunnyArr[i];
    b.update();
    b.render(canvasData);

   }
   canvasData.unlock();

The render method of the Bunny class:

        public function render(canvasData:BitmapData):Void
 {
  dest.x = x;
  dest.y = y;
  canvasData.copyPixels(imageData, rect, dest, null, null, true);
 }

If i comment out the lock() it runs.

I am very new to Haxe and do not have any recent knowledge of Javascript unfortunately. I am just testing the different outputs and also using NME.

I would say I think you should leave a software option however. I work for a small indie game company and some of our games are for clients. With such variying results when using Hardware, it is often safer just to use software.

Thanks for you help.

I looked at the code again, it seems I never committed the software mode, though I did find some other issues so I have reverted some parts of the code back to 0.8.5..

sorry, but jeash still must make a good balance between flash compatibility and performance..

right now locked and unlocked copypixels works identically.

Hey thanks for all your work, as I said im still int he tesing phase but in the future I coudl see myselfe using libs like jeash daily. Thanks again!

Adam