[Qemu-devel] Re: [PATCH 1/3] cursor: add cursor functions.

[Gerd Hoffmann <kraxel@redhat.com>]

>>> Then there would be no need of parsing.
>>
>>   You would need _two_ bitmaps (e.g. mask and cursor, so that mask=1 gives
>> transparent, mask=0 cursor=0 gives black and mask=0 cursor=1 gives white).
>
> Yes, but it's still packed more efficiently.

Well.  You can't have both.  We can have a efficiently packed format 
(i.e. two bitmaps).  Or we can do it in a way which doesn't need 
parsing, but that wouldn't be the most compact format ...

> There's yet another way:
> #define _ 0,
> #define X 0xff000000,
> #define o 0xffffffff,
> {
>   _ _ _ X o X _ _ _
> }
> #undef _
> #undef X
> #undef o

Neat idea ;)

cheers,
   Gerd