solid_color_scrollbar_layer_impl_unittest.cc revision 010d83a9304c5a91596085d917d248abff47903a 
1// Copyright 2014 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/solid_color_scrollbar_layer_impl.h"
6
7#include "cc/test/layer_test_common.h"
8#include "testing/gtest/include/gtest/gtest.h"
9
10namespace cc {
11namespace {
12
13TEST(SolidColorScrollbarLayerImplTest, Occlusion) {
14  gfx::Size layer_size(10, 1000);
15  gfx::Size viewport_size(1000, 1000);
16
17  LayerTestCommon::LayerImplTest impl;
18
19  ScrollbarOrientation orientation = VERTICAL;
20  int thumb_thickness = layer_size.width();
21  int track_start = 0;
22  bool is_left_side_vertical_scrollbar = false;
23  bool is_overlay = false;
24
25  SolidColorScrollbarLayerImpl* scrollbar_layer_impl =
26      impl.AddChildToRoot<SolidColorScrollbarLayerImpl>(
27          orientation,
28          thumb_thickness,
29          track_start,
30          is_left_side_vertical_scrollbar,
31          is_overlay);
32  scrollbar_layer_impl->SetAnchorPoint(gfx::PointF());
33  scrollbar_layer_impl->SetBounds(layer_size);
34  scrollbar_layer_impl->SetContentBounds(layer_size);
35  scrollbar_layer_impl->SetDrawsContent(true);
36  scrollbar_layer_impl->SetCurrentPos(100.f / 4);
37  scrollbar_layer_impl->SetMaximum(100);
38  scrollbar_layer_impl->SetVisibleToTotalLengthRatio(1.f / 2);
39  // SolidColorScrollbarLayers construct with opacity = 0.f, so override.
40  scrollbar_layer_impl->SetOpacity(1.f);
41
42  impl.CalcDrawProps(viewport_size);
43
44  gfx::Rect thumb_rect = scrollbar_layer_impl->ComputeThumbQuadRect();
45  EXPECT_EQ(gfx::Rect(0, 500 / 4, 10, layer_size.height() / 2).ToString(),
46            thumb_rect.ToString());
47
48  {
49    SCOPED_TRACE("No occlusion");
50    gfx::Rect occluded;
51    impl.AppendQuadsWithOcclusion(scrollbar_layer_impl, occluded);
52
53    LayerTestCommon::VerifyQuadsExactlyCoverRect(impl.quad_list(), thumb_rect);
54    EXPECT_EQ(1u, impl.quad_list().size());
55  }
56
57  {
58    SCOPED_TRACE("Full occlusion");
59    gfx::Rect occluded(scrollbar_layer_impl->visible_content_rect());
60    impl.AppendQuadsWithOcclusion(scrollbar_layer_impl, occluded);
61
62    LayerTestCommon::VerifyQuadsExactlyCoverRect(impl.quad_list(), gfx::Rect());
63    EXPECT_EQ(impl.quad_list().size(), 0u);
64  }
65
66  {
67    SCOPED_TRACE("Partial occlusion");
68    gfx::Rect occluded(0, 0, 5, 1000);
69    impl.AppendQuadsWithOcclusion(scrollbar_layer_impl, occluded);
70
71    size_t partially_occluded_count = 0;
72    LayerTestCommon::VerifyQuadsCoverRectWithOcclusion(
73        impl.quad_list(), thumb_rect, occluded, &partially_occluded_count);
74    // The layer outputs one quad, which is partially occluded.
75    EXPECT_EQ(1u, impl.quad_list().size());
76    EXPECT_EQ(1u, partially_occluded_count);
77  }
78}
79
80}  // namespace
81}  // namespace cc
82