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/*
* Copyright © 2020 Benjamin Otte
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
* Authors: Benjamin Otte <otte@gnome.org>
*/
#include <gtk/gtk.h>
#include "gsk/gskcurveprivate.h"
static gboolean
measure_segment (const graphene_point_t *from,
const graphene_point_t *to,
float from_t,
float to_t,
gpointer data)
{
float *length = data;
*length += graphene_point_distance (from, to, NULL, NULL);
return TRUE;
}
static float
measure_length (const GskCurve *curve)
{
float result = 0;
gsk_curve_decompose (curve, 0.5, measure_segment, &result);
return result;
}
/* This is a pretty nasty conic that makes it obvious that split()
* does not respect the progress values, so split() twice with
* scaled factor won't work.
*/
static void
test_conic_segment (void)
{
GskCurve c, s, e, m;
graphene_point_t pts[4] = {
GRAPHENE_POINT_INIT (-1856.131591796875, 46.217609405517578125),
GRAPHENE_POINT_INIT (-1555.9866943359375, 966.0810546875),
GRAPHENE_POINT_INIT (98.94945526123046875, 0),
GRAPHENE_POINT_INIT (-1471.33154296875, 526.701171875)
};
float start = 0.02222645096480846405029296875;
float end = 0.982032716274261474609375;
gsk_curve_init (&c, gsk_pathop_encode (GSK_PATH_CONIC, pts));
gsk_curve_split (&c, start, &s, NULL);
gsk_curve_segment (&c, start, end, &m);
gsk_curve_split (&c, end, NULL, &e);
g_assert_cmpfloat_with_epsilon (measure_length (&c), measure_length (&s) + measure_length (&m) + measure_length (&e), 0.03125);
}
int
main (int argc,
char *argv[])
{
gtk_test_init (&argc, &argv, NULL);
g_test_add_func ("/curve/special/conic-segment", test_conic_segment);
return g_test_run ();
}
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