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/* Pango
* testmatrix.c: Test program for PangoMatrix
*
* Copyright (C) 2021 Matthias Clasen
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include <glib.h>
#include <pango/pango.h>
#define matrix_equal(m1, m2) \
(G_APPROX_VALUE ((m1)->xx, (m2)->xx, 0.0001) && \
G_APPROX_VALUE ((m1)->xy, (m2)->xy, 0.0001) && \
G_APPROX_VALUE ((m1)->yx, (m2)->yx, 0.0001) && \
G_APPROX_VALUE ((m1)->yy, (m2)->yy, 0.0001) && \
G_APPROX_VALUE ((m1)->x0, (m2)->x0, 0.0001) && \
G_APPROX_VALUE ((m1)->y0, (m2)->y0, 0.0001))
static void
test_matrix_translate (void)
{
PangoMatrix m = PANGO_MATRIX_INIT;
PangoMatrix m2 = PANGO_MATRIX_INIT;
pango_matrix_translate (&m, 10, 10);
pango_matrix_translate (&m, -10, -10);
g_assert_true (matrix_equal (&m, &m2));
}
static void
test_matrix_rotate (void)
{
PangoMatrix m = PANGO_MATRIX_INIT;
PangoMatrix m2 = PANGO_MATRIX_INIT;
pango_matrix_rotate (&m, 90);
pango_matrix_rotate (&m, 90);
pango_matrix_rotate (&m, 90);
pango_matrix_rotate (&m, 90);
g_assert_true (matrix_equal (&m, &m2));
}
static void
test_matrix_scale(void)
{
PangoMatrix m = PANGO_MATRIX_INIT;
PangoMatrix m2 = PANGO_MATRIX_INIT;
pango_matrix_scale (&m, 4, 5);
m2.xx = 4;
m2.yy = 5;
g_assert_true (matrix_equal (&m, &m2));
}
static void
test_matrix_concat (void)
{
PangoMatrix m = PANGO_MATRIX_INIT;
PangoMatrix id = PANGO_MATRIX_INIT;
PangoMatrix *m2;
pango_matrix_rotate (&m, 120);
m2 = pango_matrix_copy (&m);
pango_matrix_concat (m2, &m);
pango_matrix_concat (m2, &m);
g_assert_true (matrix_equal (&id, m2));
pango_matrix_free (m2);
}
static void
test_matrix_font_scale (void)
{
PangoMatrix m = PANGO_MATRIX_INIT;
double x, y;
pango_matrix_scale (&m, 2, 3);
pango_matrix_get_font_scale_factors (&m, &x, &y);
g_assert_cmpfloat (x, ==, 2);
g_assert_cmpfloat (y, ==, 3);
g_assert_cmpfloat (pango_matrix_get_font_scale_factor (&m), ==, 3);
pango_matrix_rotate (&m, 90);
pango_matrix_get_font_scale_factors (&m, &x, &y);
g_assert_cmpfloat (x, ==, 3);
g_assert_cmpfloat (y, ==, 2);
}
static void
test_matrix_transform_point (void)
{
PangoMatrix m = PANGO_MATRIX_INIT;
double x, y;
pango_matrix_translate (&m, 1, 1);
pango_matrix_scale (&m, 2, 4);
pango_matrix_rotate (&m, -90);
x = 1;
y = 0;
pango_matrix_transform_point (&m, &x, &y);
g_assert_cmpfloat_with_epsilon (x, 1, 0.001);
g_assert_cmpfloat_with_epsilon (y, 5, 0.001);
}
static void
test_matrix_transform_distance (void)
{
PangoMatrix m = PANGO_MATRIX_INIT;
double x, y;
pango_matrix_translate (&m, 1, 1);
pango_matrix_scale (&m, 2, 4);
pango_matrix_rotate (&m, -90);
x = 1;
y = 0;
pango_matrix_transform_distance (&m, &x, &y);
g_assert_cmpfloat_with_epsilon (x, 0, 0.001);
g_assert_cmpfloat_with_epsilon (y, 4, 0.001);
}
static void
test_matrix_transform_rect (void)
{
PangoMatrix m = PANGO_MATRIX_INIT;
PangoRectangle rect;
pango_matrix_rotate (&m, 45);
rect.x = 0;
rect.y = 0;
rect.width = 1 * PANGO_SCALE;
rect.height = 1 * PANGO_SCALE;
pango_matrix_transform_rectangle (&m, &rect);
g_assert_cmpfloat_with_epsilon (rect.x, 0, 0.5);
g_assert_cmpfloat_with_epsilon (rect.y, - G_SQRT2 / 2 * PANGO_SCALE, 0.5);
g_assert_cmpfloat_with_epsilon (rect.width, G_SQRT2 * PANGO_SCALE, 0.5);
g_assert_cmpfloat_with_epsilon (rect.height, G_SQRT2 * PANGO_SCALE, 0.5);
}
static void
test_matrix_transform_pixel_rect (void)
{
PangoMatrix m = PANGO_MATRIX_INIT;
PangoRectangle rect;
pango_matrix_rotate (&m, 45);
rect.x = 0;
rect.y = 0;
rect.width = 1;
rect.height = 1;
pango_matrix_transform_pixel_rectangle (&m, &rect);
g_assert_cmpfloat_with_epsilon (rect.x, 0, 0.1);
g_assert_cmpfloat_with_epsilon (rect.y, -1, 0.1);
g_assert_cmpfloat_with_epsilon (rect.width, 2, 0.1);
g_assert_cmpfloat_with_epsilon (rect.height, 2, 0.1);
}
int
main (int argc, char *argv[])
{
g_test_init (&argc, &argv, NULL);
g_test_add_func ("/matrix/translate", test_matrix_translate);
g_test_add_func ("/matrix/rotate", test_matrix_rotate);
g_test_add_func ("/matrix/scale", test_matrix_scale);
g_test_add_func ("/matrix/concat", test_matrix_concat);
g_test_add_func ("/matrix/font-scale", test_matrix_font_scale);
g_test_add_func ("/matrix/transform-point", test_matrix_transform_point);
g_test_add_func ("/matrix/transform-distance", test_matrix_transform_distance);
g_test_add_func ("/matrix/transform-rect", test_matrix_transform_rect);
g_test_add_func ("/matrix/transform-pixel-rect", test_matrix_transform_pixel_rect);
return g_test_run ();
}
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