| Re: [AD] update bitmap drawing after addition of transformations |
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- To: Coordination of admins/developers of the game programming library Allegro <alleg-developers@xxxxxxxxxx>
- Subject: Re: [AD] update bitmap drawing after addition of transformations
- From: Elias Pschernig <elias.pschernig@xxxxxxxxxx>
- Date: Sat, 14 Aug 2010 16:30:44 +0200
On Sat, 2010-08-14 at 11:11 +1000, Peter Wang wrote:
>
> Do you mean the texture clamping(?)?
>
Well, previously we made sure in al_create_sub_bitmap that the area was
inside. So we never did any source clipping. Now a sub bitmap can be
outside of its parent or even bigger than its parent so source clipping
is necessary (for sub bitmaps).
>
> Oh, I didn't realise that it was broken in 4.9.21.
>
> Author: Matthew Leverton <konforce@xxxxxxxxxx>
> Date: Fri Jul 2 22:16:28 2010 +0000
>
> merge sub-bitmap and parent bitmap clipping; clip source bitmap to (0,0)-(w,h); fix flipping to/from clipped bitmaps
>
> git-svn-id: https://alleg.svn.sourceforge.net/svnroot/alleg/allegro/branches/4.9@xxxxxxxxxx 198e8dbc-0e07-0410-9fd0-dca9db973e3e
>
>
That was only for un-transformed sub-bitmaps - e.g. negative scaling was
broken.
I think I solved all the issues now though and committed it. Now we
should have all possible blitting combinations work again, for once.
--
Elias Pschernig <elias.pschernig@xxxxxxxxxx>