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/* This file is part of the GNU plotutils package. Copyright (C) 1995,
1996, 1997, 1998, 1999, 2000, 2005, 2008, Free Software Foundation, Inc.
The GNU plotutils package is free software. You may redistribute it
and/or modify it under the terms of the GNU General Public License as
published by the Free Software foundation; either version 2, or (at your
option) any later version.
The GNU plotutils package is distributed in the hope that it will be
useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License along
with the GNU plotutils package; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 51 Franklin St., Fifth Floor,
Boston, MA 02110-1301, USA. */
/* The internal point-drawing function, which point() is a wrapper around.
It draws a point at the current location. There is no standard
definition of `point', so any Plotter is free to implement this as it
sees fit. */
#include "sys-defines.h"
#include "extern.h"
/* size of a `point' as fraction of diagonal distance between scaling
points P1 and P2, i.e. as fraction of distance between opposite corners
of the viewport */
#define POINT_HPGL_SIZE 0.0001
void
_pl_h_paint_point (S___(Plotter *_plotter))
{
int saved_join_type, saved_cap_type;
if (_plotter->drawstate->pen_type != 0)
/* have a pen to draw with */
{
/* Sync pen color. This may set the _plotter->hpgl_bad_pen flag (if
optimal pen is #0 [white] and we're not allowed to use pen #0 to
draw with). So we test _plotter->hpgl_bad_pen before drawing the
point (see below). */
_pl_h_set_pen_color (R___(_plotter) HPGL_OBJECT_PATH);
/* temporarily store line attributes */
saved_join_type = _plotter->drawstate->join_type;
saved_cap_type = _plotter->drawstate->cap_type;
_plotter->drawstate->join_type = PL_JOIN_ROUND;
_plotter->drawstate->cap_type = PL_CAP_ROUND;
/* sync line attributes and pen position */
_pl_h_set_attributes (S___(_plotter));
_pl_h_set_position (S___(_plotter));
/* we wish to set a pen width in terms of HP-GL coordinates, which
_pl_h_set_attributes can't do; so we do it specially */
if (_plotter->hpgl_version == 2)
{
if (_plotter->hpgl_pen_width != POINT_HPGL_SIZE)
{
sprintf (_plotter->data->page->point, "PW%.4f;",
100.0 * POINT_HPGL_SIZE);
_update_buffer (_plotter->data->page);
_plotter->hpgl_pen_width = POINT_HPGL_SIZE;
}
}
if (_plotter->hpgl_bad_pen == false)
/* no problems with nonexistent pen */
{
if (_plotter->hpgl_pendown == false)
/* N.B. if pen were down, point would be invisible */
{
strcpy (_plotter->data->page->point, "PD;");
_update_buffer (_plotter->data->page);
_plotter->hpgl_pendown = true;
}
strcpy (_plotter->data->page->point, "PU;");
_update_buffer (_plotter->data->page);
_plotter->hpgl_pendown = false;
}
/* restore line attributes */
_plotter->drawstate->join_type = saved_join_type;
_plotter->drawstate->cap_type = saved_cap_type;
}
}
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