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Create a GF offscreen context
PdOffscreenContext_t *PdCreateOffscreenContextGF(
gf_surface_t surface);
- surface
- A handle to a GF 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
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