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/* This file contains the erase method, which is a standard part of
libplot. It erases all objects on the graphics device display.
A PSPlotter simply resets the output buffer, discarding all objects
written to it, resets the bounding box, and marks all Postscript fonts
as unused. */
#include "sys-defines.h"
#include "plot.h"
#include "extern.h"
int
#ifdef _HAVE_PROTOS
_p_erase (void)
#else
_p_erase ()
#endif
{
int i;
if (!_plotter->open)
{
_plotter->error ("erase: invalid operation");
return -1;
}
_plotter->endpath (); /* flush polyline if any */
_reset_buffer (&_plotter->outbuf); /* discard all objects */
_reset_range (); /* reset bounding box */
/* reinitialize `font used' array */
for (i = 0; i < NUM_PS_FONTS; i++)
_plotter->ps_font_used[i] = false;
return 0;
}
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