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/* cairo - a vector graphics library with display and print output
*
* Copyright © 2005 Red Hat, Inc
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
* The Original Code is the cairo graphics library.
*
* The Initial Developer of the Original Code is Red Hat, Inc.
*
* Contributor(s):
* Carl Worth <cworth@cworth.org>
*/
#include "cairoint.h"
void
_cairo_stroke_style_init (cairo_stroke_style_t *style)
{
VG (VALGRIND_MAKE_MEM_UNDEFINED (style, sizeof (cairo_stroke_style_t)));
style->line_width = CAIRO_GSTATE_LINE_WIDTH_DEFAULT;
style->line_cap = CAIRO_GSTATE_LINE_CAP_DEFAULT;
style->line_join = CAIRO_GSTATE_LINE_JOIN_DEFAULT;
style->miter_limit = CAIRO_GSTATE_MITER_LIMIT_DEFAULT;
style->dash = NULL;
style->num_dashes = 0;
style->dash_offset = 0.0;
}
cairo_status_t
_cairo_stroke_style_init_copy (cairo_stroke_style_t *style,
cairo_stroke_style_t *other)
{
if (CAIRO_INJECT_FAULT ())
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
VG (VALGRIND_MAKE_MEM_UNDEFINED (style, sizeof (cairo_stroke_style_t)));
style->line_width = other->line_width;
style->line_cap = other->line_cap;
style->line_join = other->line_join;
style->miter_limit = other->miter_limit;
style->num_dashes = other->num_dashes;
if (other->dash == NULL) {
style->dash = NULL;
} else {
style->dash = _cairo_malloc_ab (style->num_dashes, sizeof (double));
if (unlikely (style->dash == NULL))
return _cairo_error (CAIRO_STATUS_NO_MEMORY);
memcpy (style->dash, other->dash,
style->num_dashes * sizeof (double));
}
style->dash_offset = other->dash_offset;
return CAIRO_STATUS_SUCCESS;
}
void
_cairo_stroke_style_fini (cairo_stroke_style_t *style)
{
if (style->dash) {
free (style->dash);
style->dash = NULL;
}
style->num_dashes = 0;
VG (VALGRIND_MAKE_MEM_NOACCESS (style, sizeof (cairo_stroke_style_t)));
}
/*
* For a stroke in the given style, compute the maximum distance
* from the path that vertices could be generated. In the case
* of rotation in the ctm, the distance will not be exact.
*/
void
_cairo_stroke_style_max_distance_from_path (const cairo_stroke_style_t *style,
const cairo_matrix_t *ctm,
double *dx, double *dy)
{
double style_expansion = 0.5;
if (style->line_cap == CAIRO_LINE_CAP_SQUARE)
style_expansion = M_SQRT1_2;
if (style->line_join == CAIRO_LINE_JOIN_MITER &&
style_expansion < M_SQRT2 * style->miter_limit)
{
style_expansion = M_SQRT2 * style->miter_limit;
}
style_expansion *= style->line_width;
*dx = style_expansion * hypot (ctm->xx, ctm->xy);
*dy = style_expansion * hypot (ctm->yy, ctm->yx);
}
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