I've had a few complaints from some people using my software that it won't
import some BMP files. I did a little investigation and it turns out these
files use the BI_BITFIELDS compression type, which Allegro doesn't support.
The attached patch adds support for 15-bit, 16-bit and 32-bit BMP files of
this type (according to MSDN, I think these are the only colour depths that
use this type). It works with the two files I have to test it with, so if
you approve please do add it to allegro.
Patch is against BMP.C from Allegro 4.1.12
Cheers,
Chris