mirror of https://github.com/SixLabors/ImageSharp
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
41 lines
1.3 KiB
41 lines
1.3 KiB
// Copyright (c) Six Labors and contributors.
|
|
// Licensed under the Apache License, Version 2.0.
|
|
|
|
using System.Collections.Generic;
|
|
using System.Numerics;
|
|
|
|
namespace SixLabors.ImageSharp.Tests
|
|
{
|
|
/// <summary>
|
|
/// Allows the approximate comparison of single precision floating point values.
|
|
/// </summary>
|
|
internal readonly struct ApproximateFloatComparer :
|
|
IEqualityComparer<float>,
|
|
IEqualityComparer<Vector4>
|
|
{
|
|
private readonly float Epsilon;
|
|
|
|
/// <summary>
|
|
/// Initializes a new instance of the <see cref="ApproximateFloatComparer"/> class.
|
|
/// </summary>
|
|
/// <param name="epsilon">The comparison error difference epsilon to use.</param>
|
|
public ApproximateFloatComparer(float epsilon = 1f) => this.Epsilon = epsilon;
|
|
|
|
/// <inheritdoc/>
|
|
public bool Equals(float x, float y)
|
|
{
|
|
float d = x - y;
|
|
|
|
return d >= -this.Epsilon && d <= this.Epsilon;
|
|
}
|
|
|
|
/// <inheritdoc/>
|
|
public int GetHashCode(float obj) => obj.GetHashCode();
|
|
|
|
/// <inheritdoc/>
|
|
public bool Equals(Vector4 x, Vector4 y) => this.Equals(x.X, y.X) && this.Equals(x.Y, y.Y) && this.Equals(x.Z, y.Z) && this.Equals(x.W, y.W);
|
|
|
|
/// <inheritdoc/>
|
|
public int GetHashCode(Vector4 obj) => obj.GetHashCode();
|
|
}
|
|
}
|