XFree86 server 4.x Design (DRAFT)
: Recommended driver functions
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7. Recommended driver functions
The functions outlined here are for internal use by the driver only.
They are entirely optional, and are never accessed directly from higher
layers. The sample function declarations shown here are just examples.
The interface (if any) used is up to the driver.
7.1. Save
Save the video state. This could be called from ChipScreenInit() and
(possibly) ChipEnterVT().
void ChipSave(ScrnInfoPtr pScrn)
Saves the current state. This will only be saving pre-server
states or states before returning to the server. There is only
one current saved state per screen and it is stored in private
storage in the screen.
7.2. Restore
Restore the original video state. This could be called from the
ChipLeaveVT() and ChipCloseScreen()
functions.
void ChipRestore(ScrnInfoPtr pScrn)
Restores the saved state from the private storage. Usually only
used for restoring text modes.
7.3. Initialise Mode
Initialise a video mode. This could be called from the
ChipScreenInit(), ChipSwitchMode()
and ChipEnterVT() functions.
Bool ChipModeInit(ScrnInfoPtr pScrn, DisplayModePtr mode)
Programs the hardware for the given video mode.
XFree86 server 4.x Design (DRAFT)
: Recommended driver functions
Previous: Optional Driver Functions
Next: Data and Data Structures
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