[Author Prev][Author Next][Thread Prev][Thread Next][Author Index][Thread Index]

[pygame] Simple Surfarray Alpha



Hello,

I need to make a function where the alpha value of a surface is flipped.  I can already do this with the red, green, or blue channels:

#red flip
array = pygame.surfarray.pixels3d(surface)
array[:,:,0] = 255-array[:,:,0]
del array

#green flip
array = pygame.surfarray.pixels3d(surface)
array[:,:,1] = 255-array[:,:,1]
del array

#blue flip
array = pygame.surfarray.pixels3d(surface)
array[:,:,2] = 255-array[:,:,2]
del array

#rgb flip
array = pygame.surfarray.pixels3d(surface)
array[:,:,:] = 255-array[:,:,:]
del array

I can't do the alpha flip though.  I tried:

array = pygame.surfarray.pixels_alpha(surface)
array[:,:] = 255-array[:,:]
del array

but it raises an error.

Ideas?
Thanks,
Ian