CrispImage Alpha generator
By Exarmaster

Ever have an image that you want to use for a game, but it's an anti-aliased bitmap?
Getting it to look nice in GM is a real hassle, and getting rid of the borders looks awful.

This program generates an alpha channel & a color channel
for use with sprite_set_alpha_from_sprite,
to make your images look smooth, and high-quality.

It takes bitmap images and uses some simple math to make to images.

GM Version: 6.1
Vista-compatible: Yes
Download:



A couple of screenshots to demonstrate:

Image for generator: (Note, the background color must be solid, and pink (255,0,255))

http://img39.imageshack.us/img39/2858/antialiased.png

Resulting Alpha channel:



Resulting Color channel:



I hope you enjoy this program.

For more information, run the program to see the help file.

I've used this method before - but it WILL give you pink edges if you use scaling/d3d functions (any scaling, even window resizing!).

Of course, but I forgot to mention the fix to it. If you want that issue fixed,
after getting the alpha channel, replace the semi-transparent pixels with opaque ones the color of the outline.
It works perfectly then.

The new version now generates a color channel as well. This means no pink edges.