Re: [AD] Fix for C version of draw_trans_sprite

[Eric Botcazou <ebotcazou@xxxxxxxxxx>]

> I switched to using the C sprite routines after getting strange crashes in
> the assembler versions - anyway, I noticed that the draw_trans_sprite
> doesn't work as it should (the transparent pixels turn to pink).

This used to be true...

> Starting on line 511 of cspr.h:  (allegro 4.1.7), the fix:
>
>  for (x = w - 1; x >= 0; INC_PIXEL_PTR(s), INC_PIXEL_PTR(d), x--) {
>     unsigned long c = GET_MEMORY_PIXEL(s);
> +     if (!IS_SPRITE_MASK(src, c)) {
>       c = DTS_BLEND(blender, GET_MEMORY_PIXEL(d), c);
>       PUT_MEMORY_PIXEL(d, c);
> +     }
>  }

Note that the fix is incomplete, the two similar patterns above need to be 
fixed too.

Anyway, lillo spotted the problem while working on the MacOS X port and the 
problem is now corrected on trunk and branch.

Thanks for reporting it though.

-- 
Eric Botcazou