[pygame]how to copy a surface to an other surface with alpha value?

[Devan L]

flyaflya wrote:
> I want to join some surfaces to a new big surface with alpha cannel, I want
> the new surface has  same pixels(inclue r,g,b and alpha value) as the pixels
> on the source surfaces.
> my code as follow:
>
> surf = pygame.Surface((200,200))
> surf.blit(surf1, (0,0))
> surf.blit(surf2, (0,100))
> .....
>
> but these codes can't copy alpha value to the new surface.how can I deal
> with it?

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