making crop fastere

[pelikhan]

I've noticed that crop was quite slow. The problem is that you are creating and copying a new array on each pixel with .concat. Just use .push to avoid this behavior.

            bitmap.push(data[idx]);
            bitmap.push(data[idx+1]);
            bitmap.push(data[idx+2]);
            bitmap.push(data[idx+3]);

[taggon]

Great. This make crop so faster than before.
I found your code while I'm looking into the problem.

Thank you.

[oliver-moran]

Thakns a lot, Pelikhan. A lot faster. I've integrated your code.