Re: [pygame] Unexpect blit behavior when using BLEND_ADD

[Greg Ewing <greg.ewing@xxxxxxxxxxxxxxxx>]

Lenard Lindstrom wrote:
> This means inlined blending code will have to be replaced with indirect 
> function calls. Otherwise, with all the possible permutations of 
> blending, alphablit.c will balloon in size uncontrollably.

You could make two passes over the surface, one to
update the RGB and one to update the alpha.

Or you could have a set of blending operations that
update the alpha only, and let the user make two
blit calls.

--
Greg