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Densun

ddraw and transparency

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Sure does, you''ll want to look up color keying in the sdk.




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I''ve looked it up, and this is what I do:

DDCOLORKEY ddck;

ddck.dwColorSpaceLowValue = 0;
ddck.dwColorSpaceHighValue = 0;

lpdds->SetColorKey (DDCKEY_SRCBLT, &ddck);

I''ve done this for both the offscreen surfaces and back buffer, but it doesn''t work.

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It''s a bit weird. You not only have to set your color key for the surface, you also have to do the Blt/BltFast with an option to use the SRC color key. Check the docs on Blt/BltFast for the details.

As a benefit, you can actually set the color key for every surface. Then control whether or not it is used during the Blt.

- n8

nathany.com

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