Hi,
Lets say I have two images in memory. The first image is black and
white (single channel - no alpha), the second one is RGB (no alpha)
and has a black background.
My goal is to draw the first BW image to the color buffer in its
entirety. And then to draw the second one over it making the second's
black background transparent without having to modify the image i.e.
add an alpha channel. That way the first image will show through where
the second image was black. If I could use a 2D Blit operation I could
specify that the color black was transparent. Is there an equivalent
type of operation in OpenGL?
Thanks,
Judie
