add SkRegion tests, inspired by http://code.google.com/p/skia/issues/detail?id=958

git-svn-id: http://skia.googlecode.com/svn/trunk@6323 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 61 insertions, 0 deletions

diff --git a/tests/RegionTest.cpp b/tests/RegionTest.cpp
index 8e66502f5e..f3d1e0b5a1 100644
--- a/tests/RegionTest.cpp
+++ b/tests/RegionTest.cpp
@@ -9,6 +9,66 @@
 #include "SkRegion.h"
 #include "SkRandom.h"
 
+static void Union(SkRegion* rgn, const SkIRect& rect) {
+    rgn->op(rect, SkRegion::kUnion_Op);
+}
+
+#define TEST_NO_INTERSECT(rgn, rect)    REPORTER_ASSERT(reporter, !rgn.intersects(rect))
+#define TEST_INTERSECT(rgn, rect)       REPORTER_ASSERT(reporter, rgn.intersects(rect))
+#define TEST_NO_CONTAINS(rgn, rect)     REPORTER_ASSERT(reporter, rgn.contains(rect))
+
+// inspired by http://code.google.com/p/skia/issues/detail?id=958
+//
+static void test_fromchrome(skiatest::Reporter* reporter) {
+    SkRegion r;
+    Union(&r, SkIRect::MakeXYWH(0, 0, 1, 1));
+    TEST_NO_INTERSECT(r, SkIRect::MakeXYWH(0, 0, 0, 0));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(0, 0, 2, 2));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(-1, 0, 2, 2));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(-1, -1, 2, 2));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(0, -1, 2, 2));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(-1, -1, 3, 3));
+    
+    Union(&r, SkIRect::MakeXYWH(0, 0, 3, 3));
+    Union(&r, SkIRect::MakeXYWH(10, 0, 3, 3));
+    Union(&r, SkIRect::MakeXYWH(0, 10, 13, 3));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(-1, -1, 2, 2));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(2, -1, 2, 2));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(2, 2, 2, 2));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(-1, 2, 2, 2));
+    
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(9, -1, 2, 2));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(12, -1, 2, 2));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(12, 2, 2, 2));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(9, 2, 2, 2));
+    
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(0, -1, 13, 5));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(1, -1, 11, 5));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(2, -1, 9, 5));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(2, -1, 8, 5));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(3, -1, 8, 5));
+    
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(0, 1, 13, 1));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(1, 1, 11, 1));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(2, 1, 9, 1));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(2, 1, 8, 1));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(3, 1, 8, 1));
+    
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(0, 0, 13, 13));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(0, 1, 13, 11));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(0, 2, 13, 9));
+    TEST_INTERSECT(r, SkIRect::MakeXYWH(0, 2, 13, 8));
+    
+    
+    // These test SkRegion::contains(Rect) and SkRegion::contains(Region)
+    
+    SkRegion container;
+    Union(&container, SkIRect::MakeXYWH(0, 0, 40, 20));
+    Union(&container, SkIRect::MakeXYWH(30, 20, 10, 20));
+    TEST_NO_CONTAINS(container, SkIRect::MakeXYWH(0, 0, 10, 39));
+    TEST_NO_CONTAINS(container, SkIRect::MakeXYWH(29, 0, 10, 39));
+}
+
 static void test_empties(skiatest::Reporter* reporter) {
     SkRegion valid(SkIRect::MakeWH(10, 10));
     SkRegion empty, empty2;
@@ -185,6 +245,7 @@ static void TestRegion(skiatest::Reporter* reporter) {
     test_proc(reporter, contains_proc);
     test_proc(reporter, intersects_proc);
     test_empties(reporter);
+    test_fromchrome(reporter);
 }
 
 #include "TestClassDef.h"