Re: [pygame] Per Pixel Alpha

[Lenard Lindstrom <len-l@xxxxxxxxx>]

Brian Fisher wrote:
> Hi Ian,
>   The problem is that your SRCALPHA flag wasn't respected. I think 
> this is a bug that has been fixed in svn/1.8 (although I'm not 100% 
> sure, I'll check). The simplest workaround is probably to specify a 32 
> bit depth, like this:
>
> PerPixelSurface = pygame.Surface((180,180),SRCALPHA, 32)
>
> sadly, there were a number of small bugs with getting surface settings 
> right - checking the values of get_flags() and get_bitsize() help make 
> sure pygame respected the code you wrote.
>
> On Feb 8, 2008 9:38 AM, Ian Mallett <geometrian@xxxxxxxxx 
> <mailto:geometrian@xxxxxxxxx>> wrote:
>
>     Here you go!
It is a commonly held misconception that any surface created with a  
SRCALPHA automatically has 32 bit pixels. This is wrong. The pixels size 
defaults to that of the display. To ensure per-pixel alpha always 
provide the pixel size argument. I have had to patch several packages 
because of this oversight.

--
Lenard Lindstrom
<len-l@xxxxxxxxx>