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applies_alpha() -

josmiley / Luke spywoker (mutualaccount)



not a project, just a trick
how to applies alpha channel from a surface to another ?
surface1 and surface2 must have the same size

from pygame import *
def applies_alpha(surface1,surface2):
#return a surface
#applies the alpha channel from surface1 to surface2
output = surface2.copy().convert_alpha()
surfarray.pixels_alpha(output)[:] = surfarray.array_alpha(surface1)[:]
return output

def applies_alpha_ip(surface1,surface2):
#applies the alpha channel in place from surface1 to surface2
  surfarray.pixels_alpha(surface2)[:] = surfarray.array_alpha(surface1)


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