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The GetScanLinecallback function gets the current scan line.
DWORD __stdcall GetScanLine( LPDDHAL_GETSCANLINEDATA pgsld );
Parameters
- pgsld
- Pointer to a
DDHAL_GETSCANLINEDATAstructure that contains the scan line
information.
Return Values
Returns one of the following values:
- DDHAL_DRIVER_HANDLED
- DDHAL_DRIVER_NOTHANDLED
Remarks
The returned scan line value in the dwScanLine member of the DDHAL_GETSCANLINEDATAstructure must be between 0 and <n>, where scan line 0 is the first visible scan line on the screen and <n> is the last visible scan line, plus any scan lines that occur during vertical blank. For example, if you're running at a screen resolution of 640x480, and you have 12 scan lines during vertical blank, the values returned by GetScanLinecould range from 0 to 491.
An example implementation of this callback function ( GetScanLine32) can be found in the sample IGS driver source code.
Last updated on Tuesday, July 13, 2004