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Re: [pygame] per pixel alpha revisited

Hi,
Yes, unit tests for the surfarray module were written for 1.9.1, and these did uncover problems. Note that Numeric support was deprecated so little effort was made to fix any problems with it. 

Lenard

René Dudfield wrote:

Hi,

have you tried pygame 1.9.1+ ?

You might need to compile it from source...
    http://www.pygame.org/wiki/CompileUbuntu

cu,
On Fri, Mar 12, 2010 at 4:45 PM, James Mazer <james.mazer@xxxxxxxx <mailto:james.mazer@xxxxxxxx>> wrote: 

    I just setup a new 64-bit Ubuntu 9.10 machine and ran into a nasty
    problem with per pixel alpha. The minimal code fragment below works
    correctly under 32-bit 9.04 (and lower) machines, but fails completely
    under 9.10:

      import pygame
      pygame.init()
      screen = pygame.display.set_mode((1024, 768), 0)
      alpha = pygame.surfarray.pixels_alpha(\
                 pygame.Surface((1, 1), flags=0,
    depth=32).convert_alpha())
      alpha[:] = 128
      print alpha

    Ubuntu 9.04 (pygame 1.8.1release + python 2.6.2)
     [ [255] ]

    Ubuntu 9.10 (pygame 1.8.1release + python 2.6.4)
     [ [128] ]

    Is this a bug? Or is the code I've been using for years to get per
    pixel alpha values just plain wrong?? What's the OFFICIAL way to
    instantiate a sprite with per pixel alpha?

    Thanks,
    /jamie
-- James Mazer 
    Department of Neurobiology
    Yale School of Medicine
    phone: 203-737-5853
    fax: 203-785-5263