contents_scaling_layer_unittest.cc revision c2e0dbddbe15c98d52c4786dac06cb8952a8ae6d 
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/geometry_test_utils.h"
10#include "testing/gtest/include/gtest/gtest.h"
11
12namespace cc {
13namespace {
14
15class MockContentsScalingLayer : public ContentsScalingLayer {
16 public:
17  MockContentsScalingLayer()
18      : ContentsScalingLayer() {}
19
20  virtual void SetNeedsDisplayRect(const gfx::RectF& dirty_rect) OVERRIDE {
21    last_needs_display_rect_ = dirty_rect;
22    ContentsScalingLayer::SetNeedsDisplayRect(dirty_rect);
23  }
24
25  void ResetNeedsDisplay() {
26    needs_display_ = false;
27  }
28
29  const gfx::RectF& LastNeedsDisplayRect() const {
30    return last_needs_display_rect_;
31  }
32
33  void UpdateContentsScale(float contents_scale) {
34    // Simulate CalcDrawProperties.
35    CalculateContentsScale(
36        contents_scale,
37        false,  // animating_transform_to_screen
38        &draw_properties().contents_scale_x,
39        &draw_properties().contents_scale_y,
40        &draw_properties().content_bounds);
41  }
42
43 private:
44  virtual ~MockContentsScalingLayer() {}
45
46  gfx::RectF last_needs_display_rect_;
47};
48
49void CalcDrawProps(Layer* root, float device_scale) {
50  LayerList render_surface_layer_list;
51  LayerTreeHostCommon::CalculateDrawProperties(
52      root,
53      gfx::Size(500, 500),
54      device_scale,
55      1.f,
56      NULL,
57      1024,
58      false,
59      &render_surface_layer_list);
60}
61
62TEST(ContentsScalingLayerTest, CheckContentsBounds) {
63  scoped_refptr<MockContentsScalingLayer> test_layer =
64      make_scoped_refptr(new MockContentsScalingLayer());
65
66  scoped_refptr<Layer> root = Layer::Create();
67  root->AddChild(test_layer);
68
69  test_layer->SetBounds(gfx::Size(320, 240));
70  CalcDrawProps(root, 1.f);
71  EXPECT_FLOAT_EQ(1.f, test_layer->contents_scale_x());
72  EXPECT_FLOAT_EQ(1.f, test_layer->contents_scale_y());
73  EXPECT_EQ(320, test_layer->content_bounds().width());
74  EXPECT_EQ(240, test_layer->content_bounds().height());
75
76  CalcDrawProps(root, 2.f);
77  EXPECT_EQ(640, test_layer->content_bounds().width());
78  EXPECT_EQ(480, test_layer->content_bounds().height());
79
80  test_layer->SetBounds(gfx::Size(10, 20));
81  CalcDrawProps(root, 2.f);
82  EXPECT_EQ(20, test_layer->content_bounds().width());
83  EXPECT_EQ(40, test_layer->content_bounds().height());
84
85  CalcDrawProps(root, 1.33f);
86  EXPECT_EQ(14, test_layer->content_bounds().width());
87  EXPECT_EQ(27, test_layer->content_bounds().height());
88}
89
90}  // namespace
91}  // namespace cc
92