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, int32_t* x, int32_t* y);
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 gg-error(3) code.