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Balrin

DirectX - 2D Surfaces in D3D

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I have been programming a 3D engine with D3D. I''m wanting to put up some 2D surfaces for things like a UI, custom mouse pointer, etc. Can I just do a standard blit on the back surface when I''m using D3D or is there a special technique? Currently if I try to blit the 2D surface the screen goes black and I have to reboot Any info is appreciated. Thanks, Balrin

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Yep, you can. Just make sure it''s not between the BeginScene and EndScene calls (no 2D drawing is allowed in there afaik).

--TheGoop

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Oh, I didn''t know that, but I checked and I''m trying to blt after the scene so that isn''t the problem.

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I dont''t know if any cards support this but there is a flag in the DDCAPS structure that tells if blitting is supported between Beginscene and Endscene

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I''ve generally found blitting to work fine as long as its not between BeginScene and EndScene. On many cards, it''ll work between those calls - but you take a pretty large performance hit for it, from what I can see.

If you want to avoid a state change (and don''t need really big graphics), you can always TLVERTEX structures and just specify screen coordinates with your DrawPrimitive call.

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