 Important: |
|---|
| This is retired content. This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This content may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist. |
DirectDraw allows you to create off-screen surfaces in video memory that are wider that the primary surface. This is only possible when display device support for wide surfaces is present.
To check for wide surface support, call IDirectDraw4::GetCapsand look for the DDCAPS2_WIDESURFACES flag in the dwCaps2member of the first DDCAPSstructure you send with the call. If the flag is present, you can create video memory off-screen surfaces that are wider that the primary surface.
If you attempt to create a wide surface in video memory when the DDCAPS2_WIDESURFACES flag isn't present, the attempt will fail and return DDERR_INVALIDPARAMS. Note that attempting to create extremely large surfaces might still fail, even if the driver exposes the DDCAPS2_WIDESURFACES flag.
Wide surfaces are always supported for system memory surfaces, video port surfaces, and execute buffers.
Last updated on Tuesday, May 18, 2004