cc/layers/contents_scaling_layer_unittest.cc

   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