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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/painted_scrollbar_layer_impl.h"
6 
7 #include "cc/test/layer_test_common.h"
8 #include "testing/gtest/include/gtest/gtest.h"
9 
10 namespace cc {
11 namespace {
12 
TEST(PaintedScrollbarLayerImplTest,Occlusion)13 TEST(PaintedScrollbarLayerImplTest, Occlusion) {
14   gfx::Size layer_size(10, 1000);
15   gfx::Size viewport_size(1000, 1000);
16 
17   LayerTestCommon::LayerImplTest impl;
18 
19   SkBitmap thumb_sk_bitmap;
20   thumb_sk_bitmap.allocN32Pixels(10, 10);
21   thumb_sk_bitmap.setImmutable();
22   UIResourceId thumb_uid = 5;
23   UIResourceBitmap thumb_bitmap(thumb_sk_bitmap);
24   impl.host_impl()->CreateUIResource(thumb_uid, thumb_bitmap);
25 
26   SkBitmap track_sk_bitmap;
27   track_sk_bitmap.allocN32Pixels(10, 10);
28   track_sk_bitmap.setImmutable();
29   UIResourceId track_uid = 6;
30   UIResourceBitmap track_bitmap(track_sk_bitmap);
31   impl.host_impl()->CreateUIResource(track_uid, track_bitmap);
32 
33   ScrollbarOrientation orientation = VERTICAL;
34 
35   PaintedScrollbarLayerImpl* scrollbar_layer_impl =
36       impl.AddChildToRoot<PaintedScrollbarLayerImpl>(orientation);
37   scrollbar_layer_impl->SetBounds(layer_size);
38   scrollbar_layer_impl->SetContentBounds(layer_size);
39   scrollbar_layer_impl->SetDrawsContent(true);
40   scrollbar_layer_impl->SetThumbThickness(layer_size.width());
41   scrollbar_layer_impl->SetThumbLength(500);
42   scrollbar_layer_impl->SetTrackLength(layer_size.height());
43   scrollbar_layer_impl->SetCurrentPos(100.f / 4);
44   scrollbar_layer_impl->SetMaximum(100);
45   scrollbar_layer_impl->SetVisibleToTotalLengthRatio(1.f / 2);
46   scrollbar_layer_impl->set_track_ui_resource_id(track_uid);
47   scrollbar_layer_impl->set_thumb_ui_resource_id(thumb_uid);
48 
49   impl.CalcDrawProps(viewport_size);
50 
51   gfx::Rect thumb_rect = scrollbar_layer_impl->ComputeThumbQuadRect();
52   EXPECT_EQ(gfx::Rect(0, 500 / 4, 10, layer_size.height() / 2).ToString(),
53             thumb_rect.ToString());
54 
55   {
56     SCOPED_TRACE("No occlusion");
57     gfx::Rect occluded;
58     impl.AppendQuadsWithOcclusion(scrollbar_layer_impl, occluded);
59 
60     size_t partially_occluded_count = 0;
61     LayerTestCommon::VerifyQuadsAreOccluded(
62         impl.quad_list(), occluded, &partially_occluded_count);
63     EXPECT_EQ(2u, impl.quad_list().size());
64     EXPECT_EQ(0u, partially_occluded_count);
65   }
66 
67   {
68     SCOPED_TRACE("Full occlusion");
69     gfx::Rect occluded(scrollbar_layer_impl->visible_content_rect());
70     impl.AppendQuadsWithOcclusion(scrollbar_layer_impl, occluded);
71 
72     LayerTestCommon::VerifyQuadsExactlyCoverRect(impl.quad_list(), gfx::Rect());
73     EXPECT_EQ(impl.quad_list().size(), 0u);
74   }
75 
76   {
77     SCOPED_TRACE("Partial occlusion");
78     gfx::Rect occluded(0, 0, 5, 1000);
79     impl.AppendQuadsWithOcclusion(scrollbar_layer_impl, occluded);
80 
81     size_t partially_occluded_count = 0;
82     LayerTestCommon::VerifyQuadsAreOccluded(
83         impl.quad_list(), occluded, &partially_occluded_count);
84     // The layer outputs two quads, which is partially occluded.
85     EXPECT_EQ(2u, impl.quad_list().size());
86     EXPECT_EQ(2u, partially_occluded_count);
87   }
88 }
89 
90 }  // namespace
91 }  // namespace cc
92