Re: [9fans] Porter-Duff alpha blending

[andrey mirtchovski]

> however it won't fix the program that you originally
> sent.

the "fix" (if you can call sidestepping the problem :a fix") for the
original program is to use RGB24 as the channel for black's
allocimage():

       black = allocimage(display, Rect(0, 0, Dx(screen->r),
Dy(screen->r)), RGB24, 0, DBlack);