[pygame] PNG transparency problem

["Markus Friedl" <friedl_markus@hotmail.com>]

Hi...

I have a little problem with using PNG images and hope anybody could help 
me...

I need to use a PNGs alpha channel but it actually behaves a bit strange... 
here is what I do...

- setting up video mode like this:

    if pygame.display.mode_ok(1024, 768, pygame.FULLSCREEN, 32):
        common.mainScreen = pygame.display.set_mode(1024, 768, 
pygame.FULLSCREEN, 32)
else:
    sys.exit()

- I then load a png image and create a surface:
lightSurface = pygame.image.load(os.path.join("resources", "images", 
"lights.png")).convert()

- then I blit
mainSurface.blit(lightSurface, (0,0))

- and update
pygame.display.update()


the problem is if I use "convert()" for better performance when loading the 
PNG I lose the alpha information and get a surface with a white background. 
If I do not use "convert()" it works....
well seems like the video mode is not compatible to the image format...

Any ideas????

THANKS already in advance!


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