| From: | Ben Hutchings |
| Date: | 09 Aug 99 at 23:37:07 |
| Subject: | Re: ClipBlit and reversing images |
From: Ben Hutchings <womble@zzumbouk.demon.co.uk>
On Mon, Aug 09, 1999 at 10:00:26PM +1100, Darryl Hartwig wrote:
> From: Darryl Hartwig <darrylh@powerup.com.au>
>
> Hello peoples,
>
> I'm using ClipBlit() with a minterm of 0x33 to reverse an
> image (to the same place on the RastPort). When I use a
> screen resolution of PAL - 3 deep, the reversed colours are
> fine. When I use a PicassoIV screenmode of 800x600x3 deep,
> the reversed colours are all black - not good!
>
> Any idea why and how to fix?
<snip>
Picasso 96 and CyberGraphX drivers generally don't support all
possible minterms. This is really a bug - they ought to support them
even if some functions will be very slow.
I don't know how to fix this. Perhaps you can do a FillRect using the
INVERSE paint mode?