how to copy an offscreen(created in vedio mem)

Graphics and GPU Programming Programming

Started by huhaha7171 August 02, 2005 10:23 PM

1 comment, last by huhaha7171 18 years, 8 months ago

109

Author

August 02, 2005 10:23 PM

as we know that API(UpdateSurface) can do it, but the surface must be created in system memery. so how to do it if the surface was created in vedio mem? Thanks!

hound

122

August 03, 2005 02:59 AM

Try IDirect3DDevice9::GetRenderTargetData to copy data from device memory to system memory, or D3DXLoadSurfaceFromSurface if you need some color convertion.
In case of locable surfaces you can call IDirect3DSurface9::LockRect to obtain direct access to surface data and copy them as you wish.

huhaha7171

109

Author

August 04, 2005 08:57 AM

Quote:Original post by hound
Try IDirect3DDevice9::GetRenderTargetData to copy data from device memory to system memory, or D3DXLoadSurfaceFromSurface if you need some color convertion.
In case of locable surfaces you can call IDirect3DSurface9::LockRect to obtain direct access to surface data and copy them as you wish.

----can you give me some codes using api?