| Flutter Impeller |

draw_order_resolver_unittests.cc
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1 // Copyright 2013 The Flutter 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 "flutter/testing/testing.h"
6 #include "impeller/entity/draw_order_resolver.h"
7 #include "third_party/googletest/googletest/include/gtest/gtest.h"
8
9 namespace impeller {
10 namespace testing {
11
12 TEST(DrawOrderResolverTest, GetSortedDrawsReturnsCorrectOrderWithNoClips) {
13 DrawOrderResolver resolver;
14
15 // Opaque items.
16 resolver.AddElement(0, true);
17 resolver.AddElement(1, true);
18 // Translucent items.
19 resolver.AddElement(2, false);
20 resolver.AddElement(3, false);
21
22 auto sorted_elements = resolver.GetSortedDraws(0, 0);
23
24 EXPECT_EQ(sorted_elements.size(), 4u);
25 // First, the opaque items are drawn in reverse order.
26 EXPECT_EQ(sorted_elements[0], 1u);
27 EXPECT_EQ(sorted_elements[1], 0u);
28 // Then the translucent items are drawn.
29 EXPECT_EQ(sorted_elements[2], 2u);
30 EXPECT_EQ(sorted_elements[3], 3u);
31 }
32
33 TEST(DrawOrderResolverTest, GetSortedDrawsReturnsCorrectOrderWithClips) {
34 DrawOrderResolver resolver;
35
36 // Items before clip.
37 resolver.AddElement(0, false);
38 resolver.AddElement(1, true);
39 resolver.AddElement(2, false);
40 resolver.AddElement(3, true);
41
42 // Clip.
43 resolver.PushClip(4);
44 {
45 // Clipped items.
46 resolver.AddElement(5, false);
47 resolver.AddElement(6, false);
48 // Clipped translucent items.
49 resolver.AddElement(7, true);
50 resolver.AddElement(8, true);
51 }
52 resolver.PopClip();
53
54 // Items after clip.
55 resolver.AddElement(9, true);
56 resolver.AddElement(10, false);
57 resolver.AddElement(11, true);
58 resolver.AddElement(12, false);
59
60 auto sorted_elements = resolver.GetSortedDraws(0, 0);
61
62 EXPECT_EQ(sorted_elements.size(), 13u);
63 // First, all the non-clipped opaque items are drawn in reverse order.
64 EXPECT_EQ(sorted_elements[0], 11u);
65 EXPECT_EQ(sorted_elements[1], 9u);
66 EXPECT_EQ(sorted_elements[2], 3u);
67 EXPECT_EQ(sorted_elements[3], 1u);
68 // Then, non-clipped translucent items that came before the clip are drawn in
69 // their original order.
70 EXPECT_EQ(sorted_elements[4], 0u);
71 EXPECT_EQ(sorted_elements[5], 2u);
72
73 // Then, the clip and its sorted child items are drawn.
74 EXPECT_EQ(sorted_elements[6], 4u);
75 {
76 // Opaque clipped items are drawn in reverse order.
77 EXPECT_EQ(sorted_elements[7], 8u);
78 EXPECT_EQ(sorted_elements[8], 7u);
79 // Translucent clipped items are drawn.
80 EXPECT_EQ(sorted_elements[9], 5u);
81 EXPECT_EQ(sorted_elements[10], 6u);
82 }
83 // Finally, the non-clipped translucent items which came after the clip are
84 // drawn in their original order.
85 EXPECT_EQ(sorted_elements[11], 10u);
86 EXPECT_EQ(sorted_elements[12], 12u);
87 }
88
89 TEST(DrawOrderResolverTest, GetSortedDrawsRespectsSkipCounts) {
90 DrawOrderResolver resolver;
91
92 // These items will be skipped.
93 resolver.AddElement(0, false);
94 resolver.AddElement(1, true);
95 resolver.AddElement(2, false);
96 // These ones will be included in the final draw list.
97 resolver.AddElement(3, false);
98 resolver.AddElement(4, true);
99 resolver.AddElement(5, true);
100
101 // Form the draw list, skipping elements 0, 1, and 2.
102 // This emulates what happens when entitypass applies the clear color
103 // optimization.
104 auto sorted_elements = resolver.GetSortedDraws(1, 2);
105
106 EXPECT_EQ(sorted_elements.size(), 3u);
107 // First, opaque items are drawn in reverse order.
108 EXPECT_EQ(sorted_elements[0], 5u);
109 EXPECT_EQ(sorted_elements[1], 4u);
110 // Then, translucent items are drawn.
111 EXPECT_EQ(sorted_elements[2], 3u);
112 }
113
114 TEST(DrawOrderResolverTest, GetSortedDrawsReturnsCorrectOrderWithFlush) {
115 DrawOrderResolver resolver;
116
117 resolver.AddElement(0, false);
118 resolver.AddElement(1, true);
119 resolver.AddElement(2, false);
120 resolver.AddElement(3, true);
121
122 resolver.Flush();
123
124 resolver.AddElement(4, false);
125 resolver.AddElement(5, true);
126 resolver.AddElement(6, false);
127 resolver.AddElement(7, true);
128
129 resolver.Flush();
130
131 resolver.AddElement(8, false);
132 resolver.AddElement(9, true);
133 resolver.AddElement(10, false);
134 resolver.AddElement(11, true);
135
136 auto sorted_elements = resolver.GetSortedDraws(1, 1);
137
138 EXPECT_EQ(sorted_elements.size(), 10u);
139
140 // Skipped draws apply to the first flush.
141 EXPECT_EQ(sorted_elements[0], 3u);
142 EXPECT_EQ(sorted_elements[1], 2u);
143
144 EXPECT_EQ(sorted_elements[2], 7u);
145 EXPECT_EQ(sorted_elements[3], 5u);
146 EXPECT_EQ(sorted_elements[4], 4u);
147 EXPECT_EQ(sorted_elements[5], 6u);
148
149 EXPECT_EQ(sorted_elements[6], 11u);
150 EXPECT_EQ(sorted_elements[7], 9u);
151 EXPECT_EQ(sorted_elements[8], 8u);
152 EXPECT_EQ(sorted_elements[9], 10u);
153 }
154
155 } // namespace testing
156 } // namespace impeller
impeller::DrawOrderResolver
Definition: draw_order_resolver.h:15
impeller::DrawOrderResolver::AddElement
void AddElement(size_t element_index, bool is_opaque)
Definition: draw_order_resolver.cc:14
draw_order_resolver.h
impeller::DrawOrderResolver::PushClip
void PushClip(size_t element_index)
Definition: draw_order_resolver.cc:22
impeller::DrawOrderResolver::GetSortedDraws
ElementRefs GetSortedDraws(size_t opaque_skip_count, size_t translucent_skip_count) const
Returns the sorted draws for the current draw order layer. This should only be called after all recor...
Definition: draw_order_resolver.cc:71
impeller::DrawOrderResolver::Flush
void Flush()
Definition: draw_order_resolver.cc:44
impeller::DrawOrderResolver::PopClip
void PopClip()
Definition: draw_order_resolver.cc:27
impeller
Definition: allocation.cc:12
impeller::testing::TEST
TEST(AllocationSizeTest, CanCreateTypedAllocations)
Definition: allocation_size_unittests.cc:10