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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. */
/* This internal method is invoked by an Illustrator Plotter before drawing
any object. It sets the relevant attributes (fill rule [if filling],
cap type, join type, miter limit, line width) to what they should be. */
#include "sys-defines.h"
#include "extern.h"
/* Pseudo line type, which we use internally when AI's line type,
i.e. dashing style, is set to agree with what the user specifies with
linedash(), rather than with what the user specifies with linemod().
Should not equal any of our canonical line types, i.e. PL_L_SOLID etc. */
#define SPECIAL_AI_LINE_TYPE 100
/* AI fill rule types (in version 5 and later), indexed by our internal
fill rule number (PL_FILL_ODD_WINDING/PL_FILL_NONZERO_WINDING) */
static const int _ai_fill_rule[PL_NUM_FILL_RULES] =
{ AI_FILL_ODD_WINDING, AI_FILL_NONZERO_WINDING };
/* AI (i.e. PS) join styles, indexed by internal number
(miter/rd./bevel/triangular) */
static const int _ai_join_style[PL_NUM_JOIN_TYPES] =
{ AI_LINE_JOIN_MITER, AI_LINE_JOIN_ROUND, AI_LINE_JOIN_BEVEL, AI_LINE_JOIN_ROUND };
/* AI (i.e. PS) cap styles, indexed by internal number
(butt/rd./project/triangular) */
static const int _ai_cap_style[PL_NUM_CAP_TYPES] =
{ AI_LINE_CAP_BUTT, AI_LINE_CAP_ROUND, AI_LINE_CAP_PROJECT, AI_LINE_CAP_ROUND };
void
_pl_a_set_attributes (S___(Plotter *_plotter))
{
bool changed_width = false;
int desired_fill_rule = _ai_fill_rule[_plotter->drawstate->fill_rule_type];
double desired_ai_line_width = _plotter->drawstate->device_line_width;
int desired_ai_cap_style = _ai_cap_style[_plotter->drawstate->cap_type];
int desired_ai_join_style = _ai_join_style[_plotter->drawstate->join_type];
double desired_ai_miter_limit = _plotter->drawstate->miter_limit;
int desired_ai_line_type = _plotter->drawstate->line_type;
int i;
double display_size_in_points, min_dash_unit;
if (_plotter->ai_version >= AI_VERSION_5
&& _plotter->drawstate->fill_type > 0
&& _plotter->ai_fill_rule_type != desired_fill_rule)
{
sprintf (_plotter->data->page->point, "%d XR\n", desired_fill_rule);
_update_buffer (_plotter->data->page);
_plotter->ai_fill_rule_type = desired_fill_rule;
}
if (_plotter->ai_cap_style != desired_ai_cap_style)
{
sprintf (_plotter->data->page->point, "%d J\n", desired_ai_cap_style);
_update_buffer (_plotter->data->page);
_plotter->ai_cap_style = desired_ai_cap_style;
}
if (_plotter->ai_join_style != desired_ai_join_style)
{
sprintf (_plotter->data->page->point, "%d j\n", desired_ai_join_style);
_update_buffer (_plotter->data->page);
_plotter->ai_join_style = desired_ai_join_style;
}
if (_plotter->drawstate->join_type == PL_JOIN_MITER
&& _plotter->ai_miter_limit != desired_ai_miter_limit)
{
sprintf (_plotter->data->page->point, "%.4g M\n", desired_ai_miter_limit);
_update_buffer (_plotter->data->page);
_plotter->ai_miter_limit = desired_ai_miter_limit;
}
if (_plotter->ai_line_width != desired_ai_line_width)
{
sprintf (_plotter->data->page->point, "%.4f w\n", desired_ai_line_width);
_update_buffer (_plotter->data->page);
_plotter->ai_line_width = desired_ai_line_width;
changed_width = true;
}
if (_plotter->drawstate->dash_array_in_effect
|| _plotter->ai_line_type != desired_ai_line_type
|| (changed_width && desired_ai_line_type != PL_L_SOLID))
/* must tell AI which dash array to use */
{
double *dashbuf;
int num_dashes;
double offset;
if (_plotter->drawstate->dash_array_in_effect)
/* have user-specified dash array */
{
num_dashes = _plotter->drawstate->dash_array_len;
if (num_dashes > 0)
/* non-solid line type */
{
double min_sing_val, max_sing_val;
/* compute minimum singular value of user->device coordinate
map, which we use as a multiplicative factor to convert
line widths (cf. g_linewidth.c), dash lengths, etc. */
_matrix_sing_vals (_plotter->drawstate->transform.m,
&min_sing_val, &max_sing_val);
dashbuf = (double *)_pl_xmalloc (num_dashes * sizeof(double));
for (i = 0; i < num_dashes; i++)
{
double dashlen;
dashlen =
min_sing_val * _plotter->drawstate->dash_array[i];
dashbuf[i] = dashlen;
}
offset = min_sing_val * _plotter->drawstate->dash_offset;
}
else
/* zero-length dash array, i.e. solid line type */
{
dashbuf = NULL;
offset = 0;
}
/* we'll keep track of the fact that AI is using a special
user-specified dash array by setting the `hpgl_line_type' data
member to this bogus value */
desired_ai_line_type = SPECIAL_AI_LINE_TYPE;
}
else
/* dash array not in effect, have a canonical line type instead */
{
if (desired_ai_line_type == PL_L_SOLID)
{
num_dashes = 0;
dashbuf = NULL;
offset = 0.0;
}
else
{
const int *dash_array;
double scale;
num_dashes =
_pl_g_line_styles[_plotter->drawstate->line_type].dash_array_len;
dashbuf = (double *)_pl_xmalloc (num_dashes * sizeof(double));
/* compute PS dash array for this line type */
dash_array = _pl_g_line_styles[_plotter->drawstate->line_type].dash_array;
/* scale the array of integers by line width (actually by
floored line width; see comments at head of file) */
display_size_in_points =
DMIN(_plotter->data->xmax - _plotter->data->xmin,
_plotter->data->ymax - _plotter->data->ymin);
min_dash_unit = (PL_MIN_DASH_UNIT_AS_FRACTION_OF_DISPLAY_SIZE
* display_size_in_points);
scale = DMAX(min_dash_unit,
_plotter->drawstate->device_line_width);
for (i = 0; i < num_dashes; i++)
dashbuf[i] = scale * dash_array[i];
offset = 0.0;
}
}
/* emit dash array */
sprintf (_plotter->data->page->point, "[");
_update_buffer (_plotter->data->page);
for (i = 0; i < num_dashes; i++)
{
if (i == 0)
sprintf (_plotter->data->page->point, "%.4f", dashbuf[i]);
else
sprintf (_plotter->data->page->point, " %.4f", dashbuf[i]);
_update_buffer (_plotter->data->page);
}
sprintf (_plotter->data->page->point, "] %.4f d\n", offset);
_update_buffer (_plotter->data->page);
/* Update our knowledge of AI's line type (i.e. dashing style).
This new value will be one of PL_L_SOLID etc., or the pseudo value
SPECIAL_AI_LINE_TYPE. */
_plotter->ai_line_type = desired_ai_line_type;
free (dashbuf);
}
return;
}
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