1 files changed, 67 insertions, 0 deletions
diff --git a/chromium/cc/layers/render_surface_impl_unittest.cc b/chromium/cc/layers/render_surface_impl_unittest.cc
new file mode 100644
index 00000000000..7733240c36c
--- /dev/null
+++ b/chromium/cc/layers/render_surface_impl_unittest.cc
@@ -0,0 +1,67 @@
+// Copyright 2014 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 "cc/layers/render_surface_impl.h"
+
+#include "cc/test/layer_test_common.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace cc {
+namespace {
+
+TEST(RenderSurfaceLayerImplTest, Occlusion) {
+  gfx::Size layer_size(1000, 1000);
+  gfx::Size viewport_size(1000, 1000);
+
+  LayerTestCommon::LayerImplTest impl;
+
+  LayerImpl* owning_layer_impl = impl.AddChildToRoot<LayerImpl>();
+  owning_layer_impl->SetBounds(layer_size);
+  owning_layer_impl->SetContentBounds(layer_size);
+  owning_layer_impl->SetDrawsContent(true);
+  owning_layer_impl->SetForceRenderSurface(true);
+
+  impl.CalcDrawProps(viewport_size);
+
+  RenderSurfaceImpl* render_surface_impl = owning_layer_impl->render_surface();
+  ASSERT_TRUE(render_surface_impl);
+
+  {
+    SCOPED_TRACE("No occlusion");
+    gfx::Rect occluded;
+    impl.AppendSurfaceQuadsWithOcclusion(render_surface_impl, occluded);
+
+    LayerTestCommon::VerifyQuadsExactlyCoverRect(impl.quad_list(),
+                                                 gfx::Rect(layer_size));
+    EXPECT_EQ(1u, impl.quad_list().size());
+  }
+
+  {
+    SCOPED_TRACE("Full occlusion");
+    gfx::Rect occluded(owning_layer_impl->visible_content_rect());
+    impl.AppendSurfaceQuadsWithOcclusion(render_surface_impl, occluded);
+
+    LayerTestCommon::VerifyQuadsExactlyCoverRect(impl.quad_list(), gfx::Rect());
+    EXPECT_EQ(impl.quad_list().size(), 0u);
+  }
+
+  {
+    SCOPED_TRACE("Partial occlusion");
+    gfx::Rect occluded(200, 0, 800, 1000);
+    impl.AppendSurfaceQuadsWithOcclusion(render_surface_impl, occluded);
+
+    size_t partially_occluded_count = 0;
+    LayerTestCommon::VerifyQuadsCoverRectWithOcclusion(
+        impl.quad_list(),
+        gfx::Rect(layer_size),
+        occluded,
+        &partially_occluded_count);
+    // The layer outputs one quad, which is partially occluded.
+    EXPECT_EQ(1u, impl.quad_list().size());
+    EXPECT_EQ(1u, partially_occluded_count);
+  }
+}
+
+}  // namespace
+}  // namespace cc