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DirectX 的非同步貼圖

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UFO

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Jun 2, 1999, 3:00:00 AM6/2/99
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在 DirectX 中要成功使用非同步貼圖,可是要甚麼特殊條件??
底下兩個式子,其效率完全相同, 把書翻爛了,我還是找不到答案
有興趣的,大家一起討論


_lpDDS->Blt ( &_DestRect, _lpDDSrcSurface, &_SrcRect, DDBLT_ASYNC , NULL );
_lpDDS->Blt ( &_DestRect, _lpDDSrcSurface, &_SrcRect, DDBLT_WAIT , NULL );

ps: _lpDDS and _lpDDSrcSurface 都是 video memory

why??
why??
why??


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