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Add a test for dihedral transforms

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This reveals that the multiplication and inverse aren't quite
right.
This commit is contained in:
Matthias Clasen 2024-07-09 21:00:59 -04:00 committed by Benjamin Otte
parent efacf2ff09
commit 61c22d1c72
2 changed files with 78 additions and 0 deletions
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77
testsuite/gdk/dihedral.c Normal file
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@ -0,0 +1,77 @@
#include <gtk.h>
#include "gdk/gdkdihedralprivate.h"
static void
test_invariants (void)
{
GdkDihedral d;
for (d = GDK_DIHEDRAL_NORMAL; d <= GDK_DIHEDRAL_FLIPPED_270; d++)
{
g_assert_cmpint (gdk_dihedral_combine (d, GDK_DIHEDRAL_NORMAL), ==, d);
g_assert_cmpint (gdk_dihedral_combine (d, gdk_dihedral_invert (d)), ==, GDK_DIHEDRAL_NORMAL);
g_assert_cmpint (gdk_dihedral_combine (gdk_dihedral_invert (d), d), ==, GDK_DIHEDRAL_NORMAL);
g_assert_cmpint (gdk_dihedral_invert (gdk_dihedral_invert (d)), ==, d);
}
}
static void
test_combinations (void)
{
#define N0 GDK_DIHEDRAL_NORMAL
#define N90 GDK_DIHEDRAL_90
#define N180 GDK_DIHEDRAL_180
#define N270 GDK_DIHEDRAL_270
#define F0 GDK_DIHEDRAL_FLIPPED
#define F90 GDK_DIHEDRAL_FLIPPED_90
#define F180 GDK_DIHEDRAL_FLIPPED_180
#define F270 GDK_DIHEDRAL_FLIPPED_270
static GdkDihedral expected[8][8] = {
/* N0, N90, N180, N270, F0, F90, F180, F270 */
[N0] = { N0, N90, N180, N270, F0, F90, F180, F270 },
[N90] = { N90, N180, N270, N0, F270, F0, F90, F180 },
[N180] = { N180, N270, N0, N90, F180, F270, F0, F90 },
[N270] = { N270, N0, N90, N180, F90, F180, F270, F0 },
[F0] = { F0, F90, F180, F270, N0, N90, N180, N270 },
[F90] = { F90, F180, F270, F0, N270, N0, N90, N180 },
[F180] = { F180, F270, F0, F90, N180, N270, N0, N90 },
[F270] = { F270, F0, F90, F180, N90, N180, N270, N0 },
};
GdkDihedral d1, d2;
for (d1 = GDK_DIHEDRAL_NORMAL; d1 <= GDK_DIHEDRAL_FLIPPED_270; d1++)
{
for (d2 = GDK_DIHEDRAL_NORMAL; d2 <= GDK_DIHEDRAL_FLIPPED_270; d2++)
{
g_assert_cmpint (gdk_dihedral_combine (d1, d2), ==, expected[d1][d2]);
}
}
}
static void
test_inversions (void)
{
g_assert_cmpint (gdk_dihedral_invert (GDK_DIHEDRAL_NORMAL), ==, GDK_DIHEDRAL_NORMAL);
g_assert_cmpint (gdk_dihedral_invert (GDK_DIHEDRAL_90), ==, GDK_DIHEDRAL_270);
g_assert_cmpint (gdk_dihedral_invert (GDK_DIHEDRAL_180), ==, GDK_DIHEDRAL_180);
g_assert_cmpint (gdk_dihedral_invert (GDK_DIHEDRAL_270), ==, GDK_DIHEDRAL_90);
g_assert_cmpint (gdk_dihedral_invert (GDK_DIHEDRAL_FLIPPED), ==, GDK_DIHEDRAL_FLIPPED);
g_assert_cmpint (gdk_dihedral_invert (GDK_DIHEDRAL_FLIPPED_90), ==, GDK_DIHEDRAL_FLIPPED_90);
g_assert_cmpint (gdk_dihedral_invert (GDK_DIHEDRAL_FLIPPED_180), ==, GDK_DIHEDRAL_FLIPPED_180);
g_assert_cmpint (gdk_dihedral_invert (GDK_DIHEDRAL_FLIPPED_270), ==, GDK_DIHEDRAL_FLIPPED_270);
}
int
main (int argc, char *argv[])
{
gtk_test_init (&argc, &argv, NULL);
g_test_add_func ("/dihedral/inversions", test_inversions);
g_test_add_func ("/dihedral/combinations", test_combinations);
g_test_add_func ("/dihedral/invariants", test_invariants);
return g_test_run ();
}

1
testsuite/gdk/meson.build
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@ -57,6 +57,7 @@ foreach t : tests
endforeach
internal_tests = [
{ 'name': 'dihedral' },
{ 'name': 'image' },
{ 'name': 'texture' },
{ 'name': 'gltexture' },