abort drawing if srcRect is outside of the bitmap bounds
git-svn-id: http://skia.googlecode.com/svn/trunk@951 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/tests/DrawBitmapRectTest.cpp b/tests/DrawBitmapRectTest.cpp
new file mode 100644
index 0000000..fc382ce
--- /dev/null
+++ b/tests/DrawBitmapRectTest.cpp
@@ -0,0 +1,47 @@
+#include "Test.h"
+#include "SkBitmap.h"
+#include "SkCanvas.h"
+
+static bool check_for_all_zeros(const SkBitmap& bm) {
+ SkAutoLockPixels alp(bm);
+
+ size_t count = bm.width() * bm.bytesPerPixel();
+ for (int y = 0; y < bm.height(); y++) {
+ const uint8_t* ptr = reinterpret_cast<const uint8_t*>(bm.getAddr(0, y));
+ for (size_t i = 0; i < count; i++) {
+ if (ptr[i]) {
+ return false;
+ }
+ }
+ }
+ return true;
+}
+
+static const int gWidth = 256;
+static const int gHeight = 256;
+
+static void create(SkBitmap* bm, SkBitmap::Config config, SkColor color) {
+ bm->setConfig(config, gWidth, gHeight);
+ bm->allocPixels();
+ bm->eraseColor(color);
+}
+
+static void TestDrawBitmapRect(skiatest::Reporter* reporter) {
+ SkBitmap src, dst;
+
+ create(&src, SkBitmap::kARGB_8888_Config, 0xFFFFFFFF);
+ create(&dst, SkBitmap::kARGB_8888_Config, 0);
+
+ SkCanvas canvas(dst);
+
+ SkIRect srcR = { gWidth, 0, gWidth + 16, 16 };
+ SkRect dstR = { 0, 0, SkIntToScalar(16), SkIntToScalar(16) };
+
+ canvas.drawBitmapRect(src, &srcR, dstR, NULL);
+
+ // ensure that we draw nothing if srcR does not intersect the bitmap
+ REPORTER_ASSERT(reporter, check_for_all_zeros(dst));
+}
+
+#include "TestClassDef.h"
+DEFINE_TESTCLASS("DrawBitmapRect", TestDrawBitmapRectClass, TestDrawBitmapRect)