Create a GF offscreen context
PdOffscreenContext_t *PdCreateOffscreenContextGF( gf_surface_t surface);
ph
The function binds a GF surface to a Photon PdOffscreenContext_t.
You must target this function at a specific card by calling PdSetTargetDevice(). PdCreateOffscreenContextGF() blocks until the operation is complete. |
If there isn't enough space in video RAM to create the offscreen context, the behavior of this function depends on the driver; most drivers allocate space in system memory instead (if none of SYS_ONLY, 2D_WRITABLE, or 2D_READABLE are set in flags).
A pointer to a PdOffscreenContext_t, or NULL if an error occurred.
Photon
Safety: | |
---|---|
Interrupt handler | No |
Signal handler | No |
Thread | No |
PdCreateOffscreenContext(), PdDupOffscreenContext(), PdGetOffscreenContextPtr(), PdOffscreenContext_t, PdSetOffscreenTranslation(), PdSetTargetDevice(), PgContextBlit(), PgSwapDisplay(), PhDCCreate(), PhDCRelease()
“Video memory offscreen” in the Raw Drawing and Animation chapter of the Photon Programmer's Guide