Changing the transparent color

Hello All! Is there a way to change the transparent color (I want it to be 255 instead of 0) in Allegro draw_sprite-function or should I write the routine myself? If there's not, how can I do it? Can I use Allegro bitmaps somehow in my own routine (So that I don't have to do any get_bitmap-functions).

There isn't any way how to change the color, 0 is an immediate value hardcoded in assembly. Are you sure you need to change it? If you are then it would be pretty easy if you know assembly. Is it Allegro 2.2 or some WIP ? If you really think you need it I can send you the changed function.