Re: [pygame] fade out surfaces

[Luke Miller <dodgyville@xxxxxxxxx>]

Even though I believe I have pygame running at depth 32, I get the
following error:

alpha = pygame.surfarray.pixels_alpha(surf)
ValueError: unsupport colormasks for alpha reference array

Luke


On 12/09/05, Willem <willemsh@xxxxxxxxx> wrote:
> Pete Shinners wrote:
> > On Sun, 2005-09-11 at 10:05 +1000, Luke Miller wrote:
> >
> >>Well, I might have a look at it in a few days (surfarray). It's really
> >>just one of those luxury extras...
> >
> >
> > The surfarray code for this would not be complicated. Off the top of my
> > head, this should do the job
> >
> > def multiply_alpha(surf, value):
> >     """Multiple the pixel alphas. Value range is 0 - 255."""
> >     alpha = pygame.surfarray.pixels_alpha(surf)
> >     multAlpha = alpha * value
> >     multAlpha >>= 8
> >     alpha[:] = multAlpha.astype(Numeric.UInt8)
> >
> >
> >
> Thanks a lot, although i'm not really sure how it does what it does, it
> works great! My app won't be as great as others but it'll be free and I
> think it'll fill some space better than others are doing, at least until
> some nice hacker thinks he can do better and does something pro for real.
>