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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);

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

ggiWaitRayPos(3)

 
[ prev :: next :: up ] libggimisc-current (3)
2004/03/10 22:44:11