Provides the application interface to obtain and relinquish the status of a graphics process through the Rendering Context Manager (RCM) device driver.
The rcm is used by graphics systems to obtain a gsc_handle. This handle is required in the call to aixgsc which is part of the procedure of becoming a graphics process.
The RCM device driver supports open, close, and ioctl subroutines.
A application uses the GSC_HANDLE ioctl command to get a gsc_handle as part of becoming a graphics process. When it closes rcm, either normally, or by abnormal termination, the RCM releases any displays which it owns. This is implemented as a LFT_REL_DISP ioctl command to the LFT device driver.
| Item | Description |
|---|---|
| IOCINFO | Returns devinfo structure. |
| GSC_HANDLE | Returns a gsc_handle. |
| RCM_SET_DIAG_OWNER | Obtain exclusive use of the display adapter for diagnostics. |