[gtk/fix-winding: 21/21] Add tests for winding number of custom contours

[Matthias Clasen <matthiasc src gnome org>]

commit 75e4c6a74e50e97dcdfc02795a6826628cfb56d8
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Dec 6 20:02:43 2020 -0500

    Add tests for winding number of custom contours
    
    Check that rects and circles wind the right way.

 testsuite/gsk/path-special-cases.c | 114 +++++++++++++++++++++++++++++++++++++
 1 file changed, 114 insertions(+)
---
diff --git a/testsuite/gsk/path-special-cases.c b/testsuite/gsk/path-special-cases.c
index 04a575ac1f..d1637ee65b 100644
--- a/testsuite/gsk/path-special-cases.c
+++ b/testsuite/gsk/path-special-cases.c
@@ -306,6 +306,115 @@ test_serialize_custom_contours (void)
   gsk_path_unref (path1);
 }
 
+static void
+test_in_fill_rect1 (void)
+{
+  GskPathBuilder *builder;
+  GskPath *path;
+  GskPathMeasure *measure;
+
+  builder = gsk_path_builder_new ();
+  gsk_path_builder_add_rect (builder, &GRAPHENE_RECT_INIT (0, 0, 100, 100));
+  path = gsk_path_builder_free_to_path (builder);
+  measure = gsk_path_measure_new (path);
+
+  g_assert_true (gsk_path_measure_in_fill (measure, &GRAPHENE_POINT_INIT (50, 50), GSK_FILL_RULE_WINDING));
+  g_assert_true (gsk_path_measure_in_fill (measure, &GRAPHENE_POINT_INIT (50, 50), GSK_FILL_RULE_EVEN_ODD));
+
+  g_assert_false (gsk_path_measure_in_fill (measure, &GRAPHENE_POINT_INIT (-50, 50), GSK_FILL_RULE_WINDING));
+  g_assert_false (gsk_path_measure_in_fill (measure, &GRAPHENE_POINT_INIT (-50, 50), 
GSK_FILL_RULE_EVEN_ODD));
+
+  g_assert_false (gsk_path_measure_in_fill (measure, &GRAPHENE_POINT_INIT (50, -50), GSK_FILL_RULE_WINDING));
+  g_assert_false (gsk_path_measure_in_fill (measure, &GRAPHENE_POINT_INIT (50, -50), 
GSK_FILL_RULE_EVEN_ODD));
+
+  gsk_path_measure_unref (measure);
+  gsk_path_unref (path);
+}
+
+static void
+test_in_fill_rect2 (void)
+{
+  GskPathBuilder *builder;
+  GskPath *path;
+  GskPathMeasure *measure;
+
+  builder = gsk_path_builder_new ();
+  gsk_path_builder_add_rect (builder, &GRAPHENE_RECT_INIT (100, 0, -100, 100));
+  path = gsk_path_builder_free_to_path (builder);
+  measure = gsk_path_measure_new (path);
+
+  g_assert_true (gsk_path_measure_in_fill (measure, &GRAPHENE_POINT_INIT (50, 50), GSK_FILL_RULE_WINDING));
+  g_assert_true (gsk_path_measure_in_fill (measure, &GRAPHENE_POINT_INIT (50, 50), GSK_FILL_RULE_EVEN_ODD));
+
+  gsk_path_measure_unref (measure);
+  gsk_path_unref (path);
+}
+
+static void
+test_in_fill_rect3 (void)
+{
+  GskPathBuilder *builder;
+  GskPath *path;
+  GskPathMeasure *measure;
+
+  builder = gsk_path_builder_new ();
+  gsk_path_builder_add_rect (builder, &GRAPHENE_RECT_INIT (0, 0, 100, 100));
+  gsk_path_builder_add_rect (builder, &GRAPHENE_RECT_INIT (10, 10, 80, 80));
+  path = gsk_path_builder_free_to_path (builder);
+  measure = gsk_path_measure_new (path);
+
+  g_assert_true (gsk_path_measure_in_fill (measure, &GRAPHENE_POINT_INIT (50, 50), GSK_FILL_RULE_WINDING));
+  g_assert_false (gsk_path_measure_in_fill (measure, &GRAPHENE_POINT_INIT (50, 50), GSK_FILL_RULE_EVEN_ODD));
+
+  gsk_path_measure_unref (measure);
+  gsk_path_unref (path);
+}
+
+static void
+test_in_fill_rect4 (void)
+{
+  GskPathBuilder *builder;
+  GskPath *path;
+  GskPathMeasure *measure;
+
+  builder = gsk_path_builder_new ();
+  gsk_path_builder_add_rect (builder, &GRAPHENE_RECT_INIT (0, 0, 100, 100));
+  gsk_path_builder_add_rect (builder, &GRAPHENE_RECT_INIT (90, 10, -80, 80));
+  path = gsk_path_builder_free_to_path (builder);
+  measure = gsk_path_measure_new (path);
+
+  g_assert_false (gsk_path_measure_in_fill (measure, &GRAPHENE_POINT_INIT (50, 50), GSK_FILL_RULE_WINDING));
+  g_assert_false (gsk_path_measure_in_fill (measure, &GRAPHENE_POINT_INIT (50, 50), GSK_FILL_RULE_EVEN_ODD));
+
+  gsk_path_measure_unref (measure);
+  gsk_path_unref (path);
+}
+
+static void
+test_in_fill_circle (void)
+{
+  GskPathBuilder *builder;
+  GskPath *path;
+  GskPathMeasure *measure;
+
+  builder = gsk_path_builder_new ();
+  gsk_path_builder_add_circle (builder, &GRAPHENE_POINT_INIT (50, 50), 50);
+  path = gsk_path_builder_free_to_path (builder);
+  measure = gsk_path_measure_new (path);
+
+  g_assert_true (gsk_path_measure_in_fill (measure, &GRAPHENE_POINT_INIT (50, 50), GSK_FILL_RULE_WINDING));
+  g_assert_true (gsk_path_measure_in_fill (measure, &GRAPHENE_POINT_INIT (50, 50), GSK_FILL_RULE_EVEN_ODD));
+
+  g_assert_false (gsk_path_measure_in_fill (measure, &GRAPHENE_POINT_INIT (0, 0), GSK_FILL_RULE_WINDING));
+  g_assert_false (gsk_path_measure_in_fill (measure, &GRAPHENE_POINT_INIT (0, 0), GSK_FILL_RULE_EVEN_ODD));
+
+  g_assert_false (gsk_path_measure_in_fill (measure, &GRAPHENE_POINT_INIT (100, 100), 
GSK_FILL_RULE_WINDING));
+  g_assert_false (gsk_path_measure_in_fill (measure, &GRAPHENE_POINT_INIT (100, 100), 
GSK_FILL_RULE_EVEN_ODD));
+
+  gsk_path_measure_unref (measure);
+  gsk_path_unref (path);
+}
+
 int
 main (int   argc,
       char *argv[])
@@ -314,6 +423,11 @@ main (int   argc,
 
   g_test_add_func ("/path/rsvg-parse", test_rsvg_parse);
   g_test_add_func ("/path/serialize-custom-contours", test_serialize_custom_contours);
+  g_test_add_func ("/path/in-fill/rect1", test_in_fill_rect1);
+  g_test_add_func ("/path/in-fill/rect2", test_in_fill_rect2);
+  g_test_add_func ("/path/in-fill/rect3", test_in_fill_rect3);
+  g_test_add_func ("/path/in-fill/rect4", test_in_fill_rect4);
+  g_test_add_func ("/path/in-fill/circle", test_in_fill_circle);
 
   return g_test_run ();
 }