Mac: unit test for setting a clip rect with a scale transform

skia/ext/bitmap_platform_device_mac_unittest.cc

Index: skia/ext/bitmap_platform_device_mac_unittest.cc
diff --git a/skia/ext/bitmap_platform_device_mac_unittest.cc b/skia/ext/bitmap_platform_device_mac_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..3ca6a8f68762eb80a2a8adc9cf68433b6c86244d
--- /dev/null
+++ b/skia/ext/bitmap_platform_device_mac_unittest.cc
@@ -0,0 +1,63 @@
+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "skia/ext/bitmap_platform_device_mac.h"
+
+#include "base/scoped_ptr.h"
+#include "skia/ext/skia_utils_mac.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/skia/include/core/SkMatrix.h"
+#include "third_party/skia/include/core/SkRegion.h"
+
+namespace skia {
+
+class BitmapPlatformDeviceMacTest : public testing::Test {
+ public:
+  BitmapPlatformDeviceMacTest() {
+    bitmap_.reset(
+        BitmapPlatformDevice::Create(NULL, 400, 300, /*is_opaque=*/true));

[jeremy, 2010/07/18 11:24:07]

Could you make the dimensions, constants

[Nico, 2010/07/19 15:14:51]

Done.

+  }
+
+  scoped_ptr<BitmapPlatformDevice> bitmap_;
+};
+
+TEST_F(BitmapPlatformDeviceMacTest, ClipRectTransformWithTranslate) {
+  SkMatrix transform;
+  transform.setTranslate(50, 140);
+
+  SkRegion clip_region;
+  SkIRect rect;
+  rect.set(0, 0, 400, 300);
+  clip_region.setRect(rect);
+  bitmap_->setMatrixClip(transform, clip_region);
+
+  CGContextRef context = bitmap_->GetBitmapContext();
+  SkRect clip_rect = gfx::CGRectToSkRect(CGContextGetClipBoundingBox(context));
+  transform.mapRect(&clip_rect);
+  EXPECT_EQ(0, clip_rect.fLeft);
+  EXPECT_EQ(0, clip_rect.fTop);
+  EXPECT_EQ(400, clip_rect.width());
+  EXPECT_EQ(300, clip_rect.height());
+}
+
+TEST_F(BitmapPlatformDeviceMacTest, ClipRectTransformWithScale) {
+  SkMatrix transform;
+  transform.setScale(0.5, 0.5);
+
+  SkRegion clip_region;
+  SkIRect rect;
+  rect.set(0, 0, 400, 300);
+  clip_region.setRect(rect);
+  bitmap_->setMatrixClip(transform, clip_region);
+
+  CGContextRef context = bitmap_->GetBitmapContext();
+  SkRect clip_rect = gfx::CGRectToSkRect(CGContextGetClipBoundingBox(context));
+  transform.mapRect(&clip_rect);
+  EXPECT_EQ(0, clip_rect.fLeft);
+  EXPECT_EQ(0, clip_rect.fTop);
+  EXPECT_EQ(400, clip_rect.width());
+  EXPECT_EQ(300, clip_rect.height());
+}
+
+}  // namespace skia