Hi all,

On my CLE266 board, I rendered an image to the primary layer and
requested for the overlay layer. The overlay layer was initially
covering the whole primary layer, and after changing its opacity to,
say, 0x80, it showed the underlying primary layer that was shaded by it.
All things looked good.

But when I tried SetScreenLocation on this overlay layer, no visual
change was resulted. I suppose the effect would be that only a portion
of the primary layer is covered by the overlayer, and only that portion
is shown shaded. I want to play a video on that portion, while leaving
the other part of the screen unaffected.

Is my result normal? I learn that color keying can be used to do what I
want. But I don't know the concept of it. So, can anyone offer me some help?

Thanks,

Selwyn



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