Re: [AD] set_mask_color

[aj <aj@xxxxxxxxxx>]

> But now, I guess a proper solution would be an mmx or the likes version,
> which has the mask color in some extra register, or something like that.
> Or is cached memory as fast as constants/registers?


for a really really tight loop, like masked blit,  keeping it in a register 
would be a good idea.
it does sound like a job for MMX.

look  at
/alg_4_1_16/src/i386/iblit32.s     line  221

movl $MASK_COLOR_32, %eax

just change the
#define MASK_COLOR_32

to

volatile unsigned int MASK_COLOR_32 = 0xff00ff;

then in the allegro.h  somewhere  but

extern unsigned int MASK_COLOR_32;

and the user can then set which ever colour they want.