| Flutter Impeller |

aiks_dl_clip_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/impeller/display_list/aiks_unittests.h"
6
7 #include "flutter/display_list/dl_blend_mode.h"
8 #include "flutter/display_list/dl_builder.h"
9 #include "flutter/display_list/dl_color.h"
10 #include "flutter/display_list/dl_paint.h"
11 #include "flutter/display_list/effects/dl_color_filter.h"
12 #include "flutter/display_list/geometry/dl_path_builder.h"
13 #include "flutter/testing/testing.h"
14
15 namespace impeller {
16 namespace testing {
17
18 using namespace flutter;
19
20 TEST_P(AiksTest, CanRenderNestedClips) {
21 DisplayListBuilder builder;
22 DlPaint paint;
23 paint.setColor(DlColor::kFuchsia());
24
25 builder.Save();
26 builder.ClipPath(DlPath::MakeCircle(DlPoint(200, 400), 300));
27 builder.Restore();
28 builder.ClipPath(DlPath::MakeCircle(DlPoint(600, 400), 300));
29 builder.ClipPath(DlPath::MakeCircle(DlPoint(400, 600), 300));
30 builder.DrawRect(DlRect::MakeXYWH(200, 200, 400, 400), paint);
31
32 ASSERT_TRUE(OpenPlaygroundHere(builder.Build()));
33 }
34
35 TEST_P(AiksTest, CanRenderDifferenceClips) {
36 DisplayListBuilder builder;
37 builder.Translate(400, 400);
38
39 // Limit drawing to face circle with a clip.
40 builder.ClipPath(DlPath::MakeCircle(DlPoint(0, 0), 200));
41 builder.Save();
42
43 // Cut away eyes/mouth using difference clips.
44 builder.ClipPath(DlPath::MakeCircle(DlPoint(-100, -50), 30),
45 DlClipOp::kDifference);
46 builder.ClipPath(DlPath::MakeCircle(DlPoint(100, -50), 30),
47 DlClipOp::kDifference);
48
49 DlPathBuilder path_builder;
50 path_builder.MoveTo(DlPoint(-100, 50));
51 path_builder.QuadraticCurveTo(DlPoint(0, 150), DlPoint(100, 50));
52 builder.ClipPath(path_builder.TakePath(), DlClipOp::kDifference);
53
54 // Draw a huge yellow rectangle to prove the clipping works.
55 DlPaint paint;
56 paint.setColor(DlColor::kYellow());
57 builder.DrawRect(DlRect::MakeXYWH(-1000, -1000, 2000, 2000), paint);
58
59 // Remove the difference clips and draw hair that partially covers the eyes.
60 builder.Restore();
61 paint.setColor(DlColor::kMaroon());
62 DlPathBuilder path_builder_2;
63 path_builder_2.MoveTo(DlPoint(200, -200));
64 path_builder_2.LineTo(DlPoint(-200, -200));
65 path_builder_2.LineTo(DlPoint(-200, -40));
66 path_builder_2.CubicCurveTo(DlPoint(0, -40), DlPoint(0, -80),
67 DlPoint(200, -80));
68
69 builder.DrawPath(path_builder_2.TakePath(), paint);
70
71 ASSERT_TRUE(OpenPlaygroundHere(builder.Build()));
72 }
73
74 TEST_P(AiksTest, CanRenderWithContiguousClipRestores) {
75 DisplayListBuilder builder;
76
77 // Cover the whole canvas with red.
78 DlPaint paint;
79 paint.setColor(DlColor::kRed());
80 builder.DrawPaint(paint);
81
82 builder.Save();
83
84 // Append two clips, the second resulting in empty coverage.
85 builder.ClipRect(DlRect::MakeXYWH(100, 100, 100, 100));
86 builder.ClipRect(DlRect::MakeXYWH(300, 300, 100, 100));
87
88 // Restore to no clips.
89 builder.Restore();
90
91 // Replace the whole canvas with green.
92 paint.setColor(DlColor::kGreen());
93 builder.DrawPaint(paint);
94
95 ASSERT_TRUE(OpenPlaygroundHere(builder.Build()));
96 }
97
98 TEST_P(AiksTest, ClipsUseCurrentTransform) {
99 std::array<DlColor, 5> colors = {DlColor::kWhite(), DlColor::kBlack(),
100 DlColor::kSkyBlue(), DlColor::kRed(),
101 DlColor::kYellow()};
102 DisplayListBuilder builder;
103 DlPaint paint;
104
105 builder.Translate(300, 300);
106 for (int i = 0; i < 15; i++) {
107 builder.Scale(0.8, 0.8);
108
109 paint.setColor(colors[i % colors.size()]);
110 builder.ClipPath(DlPath::MakeCircle(DlPoint(0, 0), 300));
111 builder.DrawRect(DlRect::MakeXYWH(-300, -300, 600, 600), paint);
112 }
113 ASSERT_TRUE(OpenPlaygroundHere(builder.Build()));
114 }
115
116 /// If correct, this test should draw a green circle. If any red is visible,
117 /// there is a depth bug.
118 TEST_P(AiksTest, FramebufferBlendsRespectClips) {
119 DisplayListBuilder builder;
120
121 // Clear the whole canvas with white.
122 DlPaint paint;
123 paint.setColor(DlColor::kWhite());
124 builder.DrawPaint(paint);
125
126 builder.ClipPath(DlPath::MakeCircle(DlPoint(150, 150), 50),
127 DlClipOp::kIntersect);
128
129 // Draw a red rectangle that should not show through the circle clip.
130 paint.setColor(DlColor::kRed());
131 paint.setBlendMode(DlBlendMode::kMultiply);
132 builder.DrawRect(DlRect::MakeXYWH(100, 100, 100, 100), paint);
133
134 // Draw a green circle that shows through the clip.
135 paint.setColor(DlColor::kGreen());
136 paint.setBlendMode(DlBlendMode::kSrcOver);
137 builder.DrawCircle(DlPoint(150, 150), 50, paint);
138
139 ASSERT_TRUE(OpenPlaygroundHere(builder.Build()));
140 }
141
142 } // namespace testing
143 } // namespace impeller
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