52 lines
1.5 KiB
C#
52 lines
1.5 KiB
C#
#region Copyright & License Information
|
|
/*
|
|
* Copyright 2007-2022 The OpenRA Developers (see AUTHORS)
|
|
* This file is part of OpenRA, which is free software. It is made
|
|
* available to you under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation, either version 3 of
|
|
* the License, or (at your option) any later version. For more
|
|
* information, see COPYING.
|
|
*/
|
|
#endregion
|
|
|
|
using System;
|
|
using System.Linq;
|
|
using OpenRA.Primitives;
|
|
|
|
namespace OpenRA.Graphics
|
|
{
|
|
public class PlayerColorRemap : IPaletteRemap
|
|
{
|
|
readonly int[] remapIndices;
|
|
readonly float hue;
|
|
readonly float saturation;
|
|
|
|
public PlayerColorRemap(int[] remapIndices, float hue, float saturation)
|
|
{
|
|
this.remapIndices = remapIndices;
|
|
this.hue = hue;
|
|
this.saturation = saturation;
|
|
}
|
|
|
|
public Color GetRemappedColor(Color original, int index)
|
|
{
|
|
if (!remapIndices.Contains(index))
|
|
return original;
|
|
|
|
// Color remapping is applied in a linear color space, so start
|
|
// by undoing the pre-multiplied alpha and gamma corrections
|
|
var (r, g, b) = original.ToLinear();
|
|
|
|
// Calculate the brightness (i.e HSV value) of the original colour
|
|
// This inlines the single line of Color.RgbToHsv() that we need
|
|
var value = Math.Max(Math.Max(r, g), b);
|
|
|
|
// Construct the new RGB color
|
|
(r, g, b) = Color.HsvToRgb(hue, saturation, value);
|
|
|
|
// Convert linear back to SRGB and pre-multiply by the alpha
|
|
return Color.FromLinear(original.A, r, g, b);
|
|
}
|
|
}
|
|
}
|