Re: [pygame] ARGB vs. RGBA

[Jakub Piotr CÅapa <jpc@xxxxxxxxxxxxx>]

Pete Shinners wrote:
> On Fri, 2006-12-15 at 12:07 +0100, Jakub Piotr CÅapa wrote:
> > I was trying to make some data exported from cairo as a ARGB (literally 
> > in this byte order on my big-endian machine, A beign in the lowest 
> > address) buffer into a PyGame surface but run in to some problems.
> >
> > The code which creates the bitmasks required by the SDL conversion 
> > routine does some really strange things.
> > For RGBA it takes the notation as a literal byte order in memory, low 
> > address first and simply swaps the 4 bytes on BE vs. LE.
>
> I'm not sure the problem. Passing the mask arguments when creating
> surfaces should allow any byte orderedering.
>
> size = 100, 100
> rgba_mask = 0xff000000, 0xff0000, 0xff00, 0xff
> rgba_surf = pygame.Surface(size, 0, 32, rgba_masks)
>
> argb_mask = 0xff0000, 0xff00, 0xff, 0xff000000
> argb_surf = pygame.Surface(size, 0, 32, argb_masks)

I was thinking about pygame.image.frombuffer which requires a string 
(and not an arbitrary bitmask tuple). I don't think pygame.Surface 
allows for creating surfaces out of arbitrary python buffers.

--
Regards,
Jakub Piotr CÅapa