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contour: Add more tests for circles

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Cover the radius 0 case, in particular.
This commit is contained in:
Matthias Clasen 2023-09-15 19:01:23 -04:00
parent 4d71ff6da1
commit f0bd0c3e50
1 changed files with 78 additions and 13 deletions
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91
testsuite/gsk/path-special-cases.c
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@ -1249,6 +1249,7 @@ check_path_point (const GskPathPoint *point,
{
graphene_point_t p;
graphene_vec2_t tan;
float ka1, ka2;
gsk_path_point_get_position (point, path, &p);
g_assert_true (graphene_point_near (pos, &p, 0.0001));
@ -1259,8 +1260,17 @@ check_path_point (const GskPathPoint *point,
gsk_path_point_get_tangent (point, path, GSK_PATH_TO_END, &tan);
g_assert_true (graphene_vec2_near (tan2, &tan, 0.0001));
g_assert_cmpfloat_with_epsilon (k1, gsk_path_point_get_curvature (point, path, GSK_PATH_FROM_START, NULL), 0.0001);
g_assert_cmpfloat_with_epsilon (k2, gsk_path_point_get_curvature (point, path, GSK_PATH_TO_END, NULL), 0.0001);
ka1 = gsk_path_point_get_curvature (point, path, GSK_PATH_FROM_START, NULL);
if (isfinite (k1) && isfinite (ka1))
g_assert_cmpfloat_with_epsilon (k1, ka1, 0.0001);
else
g_assert_true (isinf (k1) && isinf (ka1));
ka2 = gsk_path_point_get_curvature (point, path, GSK_PATH_TO_END, NULL);
if (isfinite (k2) && isfinite (ka2))
g_assert_cmpfloat_with_epsilon (k2, ka2, 0.0001);
else
g_assert_true (isinf (k2) && isinf (ka2));
}
static void
@ -1521,8 +1531,7 @@ test_circle_plain (void)
GskPath *path;
GskPathMeasure *measure;
GskPathPoint point;
GskRoundedRect rect;
graphene_vec2_t v1, v2;
graphene_vec2_t v1;
graphene_point_t pos, center;
char *s;
float angle, radius;
@ -1544,17 +1553,72 @@ test_circle_plain (void)
2 * M_PI * radius,
0.0001);
angle = 2 * M_PI / 8;
gsk_path_measure_get_point (measure, angle * radius, &point);
gsk_path_get_start_point (path, &point);
g_assert_true (point.idx == 1 && point.t == 0);
pos = GRAPHENE_POINT_INIT (100 + cosf (angle), 100 + sinf (angle);
graphene_vec2_init (&v1, - sinf (angle), cosf (angle));
gsk_path_get_end_point (path, &point);
g_assert_true (point.idx == 5 && point.t == 1);
check_path_point (&point, path,
&pos,
graphene_vec2_init (&v1, - sinf (angle), ),
&v1, &v1,
0.1, 0.1);
for (int i = 0; i < 8; i++)
{
angle = 2 * M_PI * (i + 1) / 8.f;
gsk_path_measure_get_point (measure, angle * radius, &point);
pos = GRAPHENE_POINT_INIT (100 + cosf (angle) * radius, 100 + sinf (angle) * radius);
graphene_vec2_init (&v1, - sinf (angle), cosf (angle));
check_path_point (&point, path,
&pos,
&v1, &v1,
0.1, 0.1);
}
gsk_path_measure_unref (measure);
gsk_path_unref (path);
}
static void
test_circle_zero (void)
{
GskPathBuilder *builder;
GskPath *path;
GskPathMeasure *measure;
GskPathPoint point;
graphene_vec2_t v1;
graphene_point_t pos, center;
char *s;
float angle, radius;
center = GRAPHENE_POINT_INIT (100, 100);
radius = 0;
builder = gsk_path_builder_new ();
gsk_path_builder_add_circle (builder, &center, radius);
path = gsk_path_builder_free_to_path (builder);
s = gsk_path_to_string (path);
g_assert_cmpstr (s, ==, "M 100 100 o 0 0, 0 0, 0.70710678118654757 o 0 0, 0 0, 0.70710678118654757 o 0 0, 0 0, 0.70710678118654757 o 0 0, 0 0, 0.70710678118654757 z");
g_free (s);
measure = gsk_path_measure_new (path);
g_assert_cmpfloat_with_epsilon (gsk_path_measure_get_length (measure),
2 * M_PI * radius,
0.0001);
for (int i = 0; i < 8; i++)
{
angle = 2 * M_PI * (i + 1) / 8.f;
gsk_path_measure_get_point (measure, angle * radius, &point);
pos = center;
graphene_vec2_init (&v1, 0, 0);
check_path_point (&point, path,
&pos,
&v1, &v1,
INFINITY, INFINITY);
}
gsk_path_measure_unref (measure);
gsk_path_unref (path);
@ -1588,6 +1652,7 @@ main (int argc, char *argv[])
g_test_add_func ("/path/rounded-rect/plain", test_rounded_rect_plain);
g_test_add_func ("/path/rounded-rect/tricky", test_rounded_rect_tricky);
g_test_add_func ("/path/circle/plain", test_circle_plain);
g_test_add_func ("/path/circle/zero", test_circle_zero);
return g_test_run ();
}