man ggiGetRayPos () - Find out where the raster beam is.
NAME
ggiGetRayPos - Find out where the raster beam is.
SYNOPSIS
#include <ggi/misc.h> int ggiGetRayPos(ggi_visual_t vis, sint32* x, sint32* y); .SH "DESCRIPTION"
Though currently only implemented via matroxfb, this function will retrieve the current position of the raster beam on a display that uses a cathode ray tube, or resembles such internally. Because it has not been implemented and put into widespread use, there may be API fluctuation as to exactly what units x,y are in, especially on displays using doublescanning modes. In addition to numerical values, the following values can be returned in either dimension: GGI_RP_BORDER means the raster is in the border of the screen; GGI_RP_BLANK means the raster is past the border and is turned off; GGI_RP_SYNC means the raster is retracing to the top of the screen.
RETURN VALUE
0 for OK, otherwise an error code.
SEE ALSO
[XRef to GGIWAITRAYPOS]