The new picturebox class is in, with a last minute hack to avoid a memory hogging problem by disposing of the images manually instead of waiting for the garbage collector. Which, by the way, wasn’t easy when the images might have multiple possible references to themselves. It would have been so much neater if I could have inherited Bitmap into a new class and added a counter to check if it could be disposed, but it had to be a sealed class didn’t it…

Also, I improved the conversion speed by applying the Brightness/Contrast/Greyscale matrix to the image after resizing instead of during. The whole DrawImage() with ImageAttributes thing is very slow.

Get it here as usual: http://ascgen2.sourceforge.net