📷 A modern, cross-platform, 2D Graphics library for .NET
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// Copyright (c) Six Labors and contributors.
// Licensed under the Apache License, Version 2.0.
using System;
using System.Buffers;
using System.Numerics;
using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using SixLabors.Memory;
using SixLabors.ImageSharp.PixelFormats;
using Xunit;
using Xunit.Abstractions;
namespace SixLabors.ImageSharp.Tests.PixelFormats
{
public partial class PixelOperationsTests
{
public class Rgba32 : PixelOperationsTests<ImageSharp.PixelFormats.Rgba32>
{
public Rgba32(ITestOutputHelper output)
: base(output)
{
}
// For 4.6 test runner MemberData does not work without redeclaring the public field in the derived test class:
public static new TheoryData<int> ArraySizesData => new TheoryData<int> { 7, 16, 1111 };
[Fact]
public void IsSpecialImplementation()
{
Assert.IsType<ImageSharp.PixelFormats.Rgba32.PixelOperations>(PixelOperations<ImageSharp.PixelFormats.Rgba32>.Instance);
}
[Fact]
public void ToVector4SimdAligned()
{
if (!Vector.IsHardwareAccelerated)
{
return;
}
ImageSharp.PixelFormats.Rgba32[] source = CreatePixelTestData(64);
Vector4[] expected = CreateExpectedVector4Data(source);
TestOperation(
source,
expected,
(s, d) => ImageSharp.PixelFormats.Rgba32.PixelOperations.ToVector4SimdAligned(s, d.GetSpan(), 64)
);
}
// [Fact] // Profiling benchmark - enable manually!
#pragma warning disable xUnit1013 // Public method should be marked as test
public void Benchmark_ToVector4()
#pragma warning restore xUnit1013 // Public method should be marked as test
{
int times = 200000;
int count = 1024;
using (IMemoryOwner<ImageSharp.PixelFormats.Rgba32> source = Configuration.Default.MemoryAllocator.Allocate<ImageSharp.PixelFormats.Rgba32>(count))
using (IMemoryOwner<Vector4> dest = Configuration.Default.MemoryAllocator.Allocate<Vector4>(count))
{
this.Measure(
times,
() =>
{
PixelOperations<ImageSharp.PixelFormats.Rgba32>.Instance.ToVector4(source.GetSpan(), dest.GetSpan(), count);
});
}
}
}
public class Argb32 : PixelOperationsTests<ImageSharp.PixelFormats.Argb32>
{
// For 4.6 test runner MemberData does not work without redeclaring the public field in the derived test class:
public Argb32(ITestOutputHelper output)
: base(output)
{
}
public static new TheoryData<int> ArraySizesData => new TheoryData<int> { 7, 16, 1111 };
}
[Theory]
[WithBlankImages(1, 1, PixelTypes.All)]
public void GetGlobalInstance<TPixel>(TestImageProvider<TPixel> dummy)
where TPixel : struct, IPixel<TPixel>
{
Assert.NotNull(PixelOperations<TPixel>.Instance);
}
}
public abstract class PixelOperationsTests<TPixel> : MeasureFixture
where TPixel : struct, IPixel<TPixel>
{
protected PixelOperationsTests(ITestOutputHelper output)
: base(output)
{
}
public static TheoryData<int> ArraySizesData => new TheoryData<int> { 7, 16, 1111 };
private static PixelOperations<TPixel> Operations => PixelOperations<TPixel>.Instance;
internal static TPixel[] CreateExpectedPixelData(Vector4[] source)
{
var expected = new TPixel[source.Length];
for (int i = 0; i < expected.Length; i++)
{
expected[i].PackFromVector4(source[i]);
}
return expected;
}
internal static TPixel[] CreateScaledExpectedPixelData(Vector4[] source)
{
var expected = new TPixel[source.Length];
for (int i = 0; i < expected.Length; i++)
{
expected[i].PackFromScaledVector4(source[i]);
}
return expected;
}
[Theory]
[MemberData(nameof(ArraySizesData))]
public void PackFromVector4(int count)
{
Vector4[] source = CreateVector4TestData(count);
TPixel[] expected = CreateExpectedPixelData(source);
TestOperation(
source,
expected,
(s, d) => Operations.PackFromVector4(s, d.GetSpan(), count)
);
}
[Theory]
[MemberData(nameof(ArraySizesData))]
public void PackFromScaledVector4(int count)
{
Vector4[] source = CreateVector4TestData(count);
TPixel[] expected = CreateScaledExpectedPixelData(source);
TestOperation(
source,
expected,
(s, d) => Operations.PackFromScaledVector4(s, d.GetSpan(), count)
);
}
internal static Vector4[] CreateExpectedVector4Data(TPixel[] source)
{
var expected = new Vector4[source.Length];
for (int i = 0; i < expected.Length; i++)
{
expected[i] = source[i].ToVector4();
}
return expected;
}
internal static Vector4[] CreateExpectedScaledVector4Data(TPixel[] source)
{
var expected = new Vector4[source.Length];
for (int i = 0; i < expected.Length; i++)
{
expected[i] = source[i].ToScaledVector4();
}
return expected;
}
[Theory]
[MemberData(nameof(ArraySizesData))]
public void ToVector4(int count)
{
TPixel[] source = CreatePixelTestData(count);
Vector4[] expected = CreateExpectedVector4Data(source);
TestOperation(
source,
expected,
(s, d) => Operations.ToVector4(s, d.GetSpan(), count)
);
}
[Theory]
[MemberData(nameof(ArraySizesData))]
public void ToScaledVector4(int count)
{
TPixel[] source = CreateScaledPixelTestData(count);
Vector4[] expected = CreateExpectedScaledVector4Data(source);
TestOperation(
source,
expected,
(s, d) => Operations.ToScaledVector4(s, d.GetSpan(), count)
);
}
[Theory]
[MemberData(nameof(ArraySizesData))]
public void PackFromRgb24Bytes(int count)
{
byte[] source = CreateByteTestData(count * 3);
var expected = new TPixel[count];
for (int i = 0; i < count; i++)
{
int i3 = i * 3;
expected[i].PackFromRgba32(new Rgba32(source[i3 + 0], source[i3 + 1], source[i3 + 2], 255));
}
TestOperation(
source,
expected,
(s, d) => Operations.PackFromRgb24Bytes(s, d.GetSpan(), count)
);
}
[Theory]
[MemberData(nameof(ArraySizesData))]
public void ToRgb24Bytes(int count)
{
TPixel[] source = CreatePixelTestData(count);
byte[] expected = new byte[count * 3];
var rgb = default(Rgb24);
for (int i = 0; i < count; i++)
{
int i3 = i * 3;
source[i].ToRgb24(ref rgb);
expected[i3] = rgb.R;
expected[i3 + 1] = rgb.G;
expected[i3 + 2] = rgb.B;
}
TestOperation(
source,
expected,
(s, d) => Operations.ToRgb24Bytes(s, d.GetSpan(), count)
);
}
[Theory]
[MemberData(nameof(ArraySizesData))]
public void PackFromRgba32Bytes(int count)
{
byte[] source = CreateByteTestData(count * 4);
var expected = new TPixel[count];
for (int i = 0; i < count; i++)
{
int i4 = i * 4;
expected[i].PackFromRgba32(new Rgba32(source[i4 + 0], source[i4 + 1], source[i4 + 2], source[i4 + 3]));
}
TestOperation(
source,
expected,
(s, d) => Operations.PackFromRgba32Bytes(s, d.GetSpan(), count)
);
}
[Theory]
[MemberData(nameof(ArraySizesData))]
public void ToRgba32Bytes(int count)
{
TPixel[] source = CreatePixelTestData(count);
byte[] expected = new byte[count * 4];
var rgba = default(Rgba32);
for (int i = 0; i < count; i++)
{
int i4 = i * 4;
source[i].ToRgba32(ref rgba);
expected[i4] = rgba.R;
expected[i4 + 1] = rgba.G;
expected[i4 + 2] = rgba.B;
expected[i4 + 3] = rgba.A;
}
TestOperation(
source,
expected,
(s, d) => Operations.ToRgba32Bytes(s, d.GetSpan(), count)
);
}
[Theory]
[MemberData(nameof(ArraySizesData))]
public void PackFromRgb48Bytes(int count)
{
byte[] source = CreateByteTestData(count * 6);
Span<byte> sourceSpan = source.AsSpan();
var expected = new TPixel[count];
var rgba64 = new Rgba64(0, 0, 0, 65535);
for (int i = 0; i < count; i++)
{
int i6 = i * 6;
rgba64.Rgb = MemoryMarshal.Cast<byte, Rgb48>(sourceSpan.Slice(i6, 6))[0];
expected[i].PackFromRgba64(rgba64);
}
TestOperation(
source,
expected,
(s, d) => Operations.PackFromRgb48Bytes(s, d.GetSpan(), count)
);
}
[Theory]
[MemberData(nameof(ArraySizesData))]
public void ToRgb48Bytes(int count)
{
TPixel[] source = CreatePixelTestData(count);
byte[] expected = new byte[count * 6];
Rgb48 rgb = default;
for (int i = 0; i < count; i++)
{
int i6 = i * 6;
source[i].ToRgb48(ref rgb);
Rgba64Bytes rgb48Bytes = Unsafe.As<Rgb48, Rgba64Bytes>(ref rgb);
expected[i6] = rgb48Bytes[0];
expected[i6 + 1] = rgb48Bytes[1];
expected[i6 + 2] = rgb48Bytes[2];
expected[i6 + 3] = rgb48Bytes[3];
expected[i6 + 4] = rgb48Bytes[4];
expected[i6 + 5] = rgb48Bytes[5];
}
TestOperation(
source,
expected,
(s, d) => Operations.ToRgb48Bytes(s, d.GetSpan(), count)
);
}
[Theory]
[MemberData(nameof(ArraySizesData))]
public void PackFromRgba64Bytes(int count)
{
byte[] source = CreateByteTestData(count * 8);
Span<byte> sourceSpan = source.AsSpan();
var expected = new TPixel[count];
for (int i = 0; i < count; i++)
{
int i8 = i * 8;
expected[i].PackFromRgba64(MemoryMarshal.Cast<byte, Rgba64>(sourceSpan.Slice(i8, 8))[0]);
}
TestOperation(
source,
expected,
(s, d) => Operations.PackFromRgba64Bytes(s, d.GetSpan(), count)
);
}
[Theory]
[MemberData(nameof(ArraySizesData))]
public void ToRgba64Bytes(int count)
{
TPixel[] source = CreatePixelTestData(count);
byte[] expected = new byte[count * 8];
Rgba64 rgba = default;
for (int i = 0; i < count; i++)
{
int i8 = i * 8;
source[i].ToRgba64(ref rgba);
Rgba64Bytes rgba64Bytes = Unsafe.As<Rgba64, Rgba64Bytes>(ref rgba);
expected[i8] = rgba64Bytes[0];
expected[i8 + 1] = rgba64Bytes[1];
expected[i8 + 2] = rgba64Bytes[2];
expected[i8 + 3] = rgba64Bytes[3];
expected[i8 + 4] = rgba64Bytes[4];
expected[i8 + 5] = rgba64Bytes[5];
expected[i8 + 6] = rgba64Bytes[6];
expected[i8 + 7] = rgba64Bytes[7];
}
TestOperation(
source,
expected,
(s, d) => Operations.ToRgba64Bytes(s, d.GetSpan(), count)
);
}
[Theory]
[MemberData(nameof(ArraySizesData))]
public void PackFromBgr24Bytes(int count)
{
byte[] source = CreateByteTestData(count * 3);
var expected = new TPixel[count];
for (int i = 0; i < count; i++)
{
int i3 = i * 3;
expected[i].PackFromRgba32(new Rgba32(source[i3 + 2], source[i3 + 1], source[i3 + 0], 255));
}
TestOperation(
source,
expected,
(s, d) => Operations.PackFromBgr24Bytes(s, d.GetSpan(), count)
);
}
[Theory]
[MemberData(nameof(ArraySizesData))]
public void ToBgr24Bytes(int count)
{
TPixel[] source = CreatePixelTestData(count);
byte[] expected = new byte[count * 3];
var bgr = default(Bgr24);
for (int i = 0; i < count; i++)
{
int i3 = i * 3;
source[i].ToBgr24(ref bgr);
expected[i3] = bgr.B;
expected[i3 + 1] = bgr.G;
expected[i3 + 2] = bgr.R;
}
TestOperation(
source,
expected,
(s, d) => Operations.ToBgr24Bytes(s, d.GetSpan(), count)
);
}
[Theory]
[MemberData(nameof(ArraySizesData))]
public void PackFromBgra32Bytes(int count)
{
byte[] source = CreateByteTestData(count * 4);
var expected = new TPixel[count];
for (int i = 0; i < count; i++)
{
int i4 = i * 4;
expected[i].PackFromRgba32(new Rgba32(source[i4 + 2], source[i4 + 1], source[i4 + 0], source[i4 + 3]));
}
TestOperation(
source,
expected,
(s, d) => Operations.PackFromBgra32Bytes(s, d.GetSpan(), count)
);
}
[Theory]
[MemberData(nameof(ArraySizesData))]
public void ToZyxwBytes(int count)
{
TPixel[] source = CreatePixelTestData(count);
byte[] expected = new byte[count * 4];
var bgra = default(Bgra32);
for (int i = 0; i < count; i++)
{
int i4 = i * 4;
source[i].ToBgra32(ref bgra);
expected[i4] = bgra.B;
expected[i4 + 1] = bgra.G;
expected[i4 + 2] = bgra.R;
expected[i4 + 3] = bgra.A;
}
TestOperation(
source,
expected,
(s, d) => Operations.ToBgra32Bytes(s, d.GetSpan(), count)
);
}
[Theory]
[MemberData(nameof(ArraySizesData))]
public void PackFromArgb32Bytes(int count)
{
byte[] source = CreateByteTestData(count * 4);
var expected = new TPixel[count];
for (int i = 0; i < count; i++)
{
int i4 = i * 4;
expected[i].PackFromRgba32(new Rgba32(source[i4 + 1], source[i4 + 2], source[i4 + 3], source[i4 + 0]));
}
TestOperation(
source,
expected,
(s, d) => Operations.PackFromArgb32Bytes(s, d.GetSpan(), count)
);
}
[Theory]
[MemberData(nameof(ArraySizesData))]
public void ToArgb32Bytes(int count)
{
TPixel[] source = CreatePixelTestData(count);
byte[] expected = new byte[count * 4];
var argb = default(Argb32);
for (int i = 0; i < count; i++)
{
int i4 = i * 4;
source[i].ToArgb32(ref argb);
expected[i4] = argb.A;
expected[i4 + 1] = argb.R;
expected[i4 + 2] = argb.G;
expected[i4 + 3] = argb.B;
}
TestOperation(
source,
expected,
(s, d) => Operations.ToArgb32Bytes(s, d.GetSpan(), count)
);
}
private class TestBuffers<TSource, TDest> : IDisposable
where TSource : struct
where TDest : struct
{
public TSource[] SourceBuffer { get; }
public IMemoryOwner<TDest> ActualDestBuffer { get; }
public TDest[] ExpectedDestBuffer { get; }
public TestBuffers(TSource[] source, TDest[] expectedDest)
{
this.SourceBuffer = source;
this.ExpectedDestBuffer = expectedDest;
this.ActualDestBuffer = Configuration.Default.MemoryAllocator.Allocate<TDest>(expectedDest.Length);
}
public void Dispose()
{
this.ActualDestBuffer.Dispose();
}
private const float Tolerance = 0.0001f;
public void Verify()
{
int count = this.ExpectedDestBuffer.Length;
if (typeof(TDest) == typeof(Vector4))
{
Span<Vector4> expected = MemoryMarshal.Cast<TDest, Vector4>(this.ExpectedDestBuffer.AsSpan());
Span<Vector4> actual = MemoryMarshal.Cast<TDest, Vector4>(this.ActualDestBuffer.GetSpan());
for (int i = 0; i < count; i++)
{
// ReSharper disable PossibleNullReferenceException
Assert.Equal(expected[i], actual[i], new ApproximateFloatComparer(0.001f));
// ReSharper restore PossibleNullReferenceException
}
}
else
{
Span<TDest> expected = this.ExpectedDestBuffer.AsSpan();
Span<TDest> actual = this.ActualDestBuffer.GetSpan();
for (int i = 0; i < count; i++)
{
Assert.Equal(expected[i], actual[i]);
}
}
}
}
internal static void TestOperation<TSource, TDest>(
TSource[] source,
TDest[] expected,
Action<TSource[], IMemoryOwner<TDest>> action)
where TSource : struct
where TDest : struct
{
using (var buffers = new TestBuffers<TSource, TDest>(source, expected))
{
action(buffers.SourceBuffer, buffers.ActualDestBuffer);
buffers.Verify();
}
}
internal static Vector4[] CreateVector4TestData(int length)
{
var result = new Vector4[length];
var rnd = new Random(42); // Deterministic random values
for (int i = 0; i < result.Length; i++)
{
result[i] = GetVector(rnd);
}
return result;
}
internal static TPixel[] CreatePixelTestData(int length)
{
var result = new TPixel[length];
var rnd = new Random(42); // Deterministic random values
for (int i = 0; i < result.Length; i++)
{
Vector4 v = GetVector(rnd);
result[i].PackFromVector4(v);
}
return result;
}
internal static TPixel[] CreateScaledPixelTestData(int length)
{
var result = new TPixel[length];
var rnd = new Random(42); // Deterministic random values
for (int i = 0; i < result.Length; i++)
{
Vector4 v = GetVector(rnd);
result[i].PackFromScaledVector4(v);
}
return result;
}
internal static byte[] CreateByteTestData(int length)
{
byte[] result = new byte[length];
var rnd = new Random(42); // Deterministic random values
for (int i = 0; i < result.Length; i++)
{
result[i] = (byte)rnd.Next(255);
}
return result;
}
internal static Vector4 GetVector(Random rnd)
{
return new Vector4(
(float)rnd.NextDouble(),
(float)rnd.NextDouble(),
(float)rnd.NextDouble(),
(float)rnd.NextDouble()
);
}
[StructLayout(LayoutKind.Sequential)]
private unsafe struct Rgba64Bytes
{
public fixed byte Data[8];
public byte this[int idx]
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
get
{
ref byte self = ref Unsafe.As<Rgba64Bytes, byte>(ref this);
return Unsafe.Add(ref self, idx);
}
}
}
}
}