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      1 // Copyright 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "cc/layers/contents_scaling_layer.h"
      6 
      7 #include <vector>
      8 
      9 #include "cc/test/fake_layer_tree_host.h"
     10 #include "cc/test/geometry_test_utils.h"
     11 #include "testing/gtest/include/gtest/gtest.h"
     12 
     13 namespace cc {
     14 namespace {
     15 
     16 class MockContentsScalingLayer : public ContentsScalingLayer {
     17  public:
     18   MockContentsScalingLayer()
     19       : ContentsScalingLayer() {}
     20 
     21   virtual void SetNeedsDisplayRect(const gfx::RectF& dirty_rect) OVERRIDE {
     22     last_needs_display_rect_ = dirty_rect;
     23     ContentsScalingLayer::SetNeedsDisplayRect(dirty_rect);
     24   }
     25 
     26   const gfx::RectF& LastNeedsDisplayRect() const {
     27     return last_needs_display_rect_;
     28   }
     29 
     30  private:
     31   virtual ~MockContentsScalingLayer() {}
     32 
     33   gfx::RectF last_needs_display_rect_;
     34 };
     35 
     36 static void CalcDrawProps(FakeLayerTreeHost* host, float device_scale_factor) {
     37   RenderSurfaceLayerList render_surface_layer_list;
     38   LayerTreeHostCommon::CalcDrawPropsMainInputsForTesting inputs(
     39       host->root_layer(), gfx::Size(500, 500), &render_surface_layer_list);
     40   inputs.device_scale_factor = device_scale_factor;
     41   LayerTreeHostCommon::CalculateDrawProperties(&inputs);
     42 }
     43 
     44 TEST(ContentsScalingLayerTest, CheckContentsBounds) {
     45   scoped_ptr<FakeLayerTreeHost> host = FakeLayerTreeHost::Create();
     46 
     47   scoped_refptr<MockContentsScalingLayer> test_layer =
     48       make_scoped_refptr(new MockContentsScalingLayer());
     49 
     50   scoped_refptr<Layer> root = Layer::Create();
     51   root->AddChild(test_layer);
     52   host->SetRootLayer(root);
     53 
     54   test_layer->SetBounds(gfx::Size(320, 240));
     55 
     56   CalcDrawProps(host.get(), 1.f);
     57   EXPECT_FLOAT_EQ(1.f, test_layer->contents_scale_x());
     58   EXPECT_FLOAT_EQ(1.f, test_layer->contents_scale_y());
     59   EXPECT_EQ(320, test_layer->content_bounds().width());
     60   EXPECT_EQ(240, test_layer->content_bounds().height());
     61 
     62   CalcDrawProps(host.get(), 2.f);
     63   EXPECT_EQ(640, test_layer->content_bounds().width());
     64   EXPECT_EQ(480, test_layer->content_bounds().height());
     65 
     66   test_layer->SetBounds(gfx::Size(10, 20));
     67   CalcDrawProps(host.get(), 2.f);
     68   EXPECT_EQ(20, test_layer->content_bounds().width());
     69   EXPECT_EQ(40, test_layer->content_bounds().height());
     70 
     71   CalcDrawProps(host.get(), 1.33f);
     72   EXPECT_EQ(14, test_layer->content_bounds().width());
     73   EXPECT_EQ(27, test_layer->content_bounds().height());
     74 }
     75 
     76 }  // namespace
     77 }  // namespace cc
     78