add SkRegion::setRects(), and its unit tests

git-svn-id: http://skia.googlecode.com/svn/trunk@588 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 63 insertions, 0 deletions

diff --git a/tests/RegionTest.cpp b/tests/RegionTest.cpp
new file mode 100644
index 0000000000..ee34d8ba83
--- /dev/null
+++ b/tests/RegionTest.cpp
@@ -0,0 +1,63 @@
+#include "Test.h"
+#include "SkRegion.h"
+#include "SkRandom.h"
+
+static void rand_rect(SkIRect* rect, SkRandom& rand) {
+    int bits = 6;
+    int shift = 32 - bits;
+    rect->set(rand.nextU() >> shift, rand.nextU() >> shift,
+              rand.nextU() >> shift, rand.nextU() >> shift);
+    rect->sort();
+}
+
+static bool test_rects(const SkIRect rect[], int count) {
+    SkRegion rgn0, rgn1;
+
+    for (int i = 0; i < count; i++) {
+        rgn0.op(rect[i], SkRegion::kUnion_Op);
+    }
+    rgn1.setRects(rect, count);
+
+    if (rgn0 != rgn1) {
+        SkDebugf("\n");
+        for (int i = 0; i < count; i++) {
+            SkDebugf(" { %d, %d, %d, %d },\n",
+                     rect[i].fLeft, rect[i].fTop,
+                     rect[i].fRight, rect[i].fBottom);
+        }
+        SkDebugf("\n");
+        return false;
+    }
+    return true;
+}
+
+static void TestRegion(skiatest::Reporter* reporter) {
+    const SkIRect r2[] = {
+        { 0, 0, 1, 1 },
+        { 2, 2, 3, 3 },
+    };
+    REPORTER_ASSERT(reporter, test_rects(r2, SK_ARRAY_COUNT(r2)));
+    
+    const SkIRect rects[] = {
+        { 0, 0, 1, 2 },
+        { 2, 1, 3, 3 },
+        { 4, 0, 5, 1 },
+        { 6, 0, 7, 4 },
+    };
+    REPORTER_ASSERT(reporter, test_rects(rects, SK_ARRAY_COUNT(rects)));
+
+    SkRandom rand;
+    for (int i = 0; i < 1000; i++) {
+        SkRegion rgn0, rgn1;
+
+        const int N = 8;
+        SkIRect rect[N];
+        for (int j = 0; j < N; j++) {
+            rand_rect(&rect[j], rand);
+        }
+        REPORTER_ASSERT(reporter, test_rects(rect, N));
+    }
+}
+
+#include "TestClassDef.h"
+DEFINE_TESTCLASS("Region", RegionTestClass, TestRegion)