A game framework written with osu! in mind.
keii.dev
1// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the MIT Licence.
2// See the LICENCE file in the repository root for full licence text.
3
4using System.Linq;
5using NUnit.Framework;
6using osu.Framework.Allocation;
7using osu.Framework.Graphics;
8using osu.Framework.Graphics.Colour;
9using osu.Framework.Graphics.Containers;
10using osu.Framework.Graphics.Shapes;
11using osu.Framework.Graphics.Sprites;
12using osu.Framework.Graphics.Textures;
13using osu.Framework.Utils;
14using osuTK;
15using osuTK.Graphics;
16
17namespace osu.Framework.Tests.Visual.Drawables
18{
19 public class TestSceneColourInterpolation : FrameworkTestScene
20 {
21 [Test]
22 public void TestColourInterpolatesInLinearSpace()
23 {
24 FillFlowContainer interpolatingLines = null;
25
26 AddStep("load interpolated colours", () =>
27 {
28 Child = new FillFlowContainer
29 {
30 Anchor = Anchor.CentreLeft,
31 Origin = Anchor.CentreLeft,
32 AutoSizeAxes = Axes.Both,
33 Direction = FillDirection.Vertical,
34 Margin = new MarginPadding(20),
35 Children = new Drawable[]
36 {
37 new SpriteText
38 {
39 Anchor = Anchor.CentreLeft,
40 Origin = Anchor.CentreLeft,
41 Text = "d3.interpolateRgb.gamma(2.2)(\"red\", \"blue\")"
42 },
43 new SampleSpriteD3
44 {
45 Anchor = Anchor.CentreLeft,
46 Origin = Anchor.CentreLeft,
47 Size = new Vector2(750f, 50f),
48 },
49 new SpriteText
50 {
51 Margin = new MarginPadding { Top = 20f },
52 Anchor = Anchor.CentreLeft,
53 Origin = Anchor.CentreLeft,
54 Text = $"{nameof(ColourInfo)}.{nameof(ColourInfo.GradientHorizontal)}(Blue, Red)"
55 },
56 new Box
57 {
58 Anchor = Anchor.CentreLeft,
59 Origin = Anchor.CentreLeft,
60 Size = new Vector2(750f, 50f),
61 Colour = ColourInfo.GradientHorizontal(Color4.Red, Color4.Blue),
62 },
63 new SpriteText
64 {
65 Margin = new MarginPadding { Top = 20f },
66 Anchor = Anchor.CentreLeft,
67 Origin = Anchor.CentreLeft,
68 Text = $"{nameof(Interpolation)}.{nameof(Interpolation.ValueAt)}(Red, Red) with 1px boxes",
69 },
70 interpolatingLines = new FillFlowContainer
71 {
72 Anchor = Anchor.CentreLeft,
73 Origin = Anchor.CentreLeft,
74 AutoSizeAxes = Axes.X,
75 Height = 50f,
76 ChildrenEnumerable = Enumerable.Range(0, 750).Select(i => new Box
77 {
78 Width = 1f,
79 RelativeSizeAxes = Axes.Y,
80 Colour = Interpolation.ValueAt(i, Color4.Red, Color4.Blue, 0, 750),
81 }),
82 },
83 }
84 };
85 });
86
87 AddAssert("interpolation in linear space", () =>
88 {
89 var middle = interpolatingLines.Children[interpolatingLines.Children.Count / 2];
90 return middle.Colour.AverageColour.Linear == new Color4(0.5f, 0f, 0.5f, 1f);
91 });
92 }
93
94 public class SampleSpriteD3 : Sprite
95 {
96 [BackgroundDependencyLoader]
97 private void load(TextureStore textures)
98 {
99 // Taken from https://observablehq.com/@d3/working-with-color
100 Texture = textures.Get("colour-interpolation");
101 }
102 }
103 }
104}