422a228cea
PlayerColorRemap expected colors in linear space yet we provided them in gamma. We fix this by instead expecting gamma space colors and then converting them into linear space ourselves.
53 lines
1.5 KiB
C#
53 lines
1.5 KiB
C#
#region Copyright & License Information
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/*
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* Copyright (c) The OpenRA Developers and Contributors
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* This file is part of OpenRA, which is free software. It is made
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* available to you under the terms of the GNU General Public License
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* as published by the Free Software Foundation, either version 3 of
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* the License, or (at your option) any later version. For more
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* information, see COPYING.
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*/
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#endregion
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using System;
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using System.Linq;
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using OpenRA.Primitives;
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namespace OpenRA.Graphics
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{
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public class PlayerColorRemap : IPaletteRemap
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{
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readonly int[] remapIndices;
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readonly float hue;
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readonly float saturation;
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public PlayerColorRemap(int[] remapIndices, Color color)
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{
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this.remapIndices = remapIndices;
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var (r, g, b) = color.ToLinear();
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(hue, saturation, _) = Color.RgbToHsv(r, g, b);
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}
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public Color GetRemappedColor(Color original, int index)
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{
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if (!remapIndices.Contains(index))
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return original;
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// Color remapping is applied in a linear color space, so start
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// by undoing the pre-multiplied alpha and gamma corrections
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var (r, g, b) = original.ToLinear();
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// Calculate the brightness (i.e HSV value) of the original colour
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// This inlines the single line of Color.RgbToHsv() that we need
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var value = Math.Max(Math.Max(r, g), b);
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// Construct the new RGB color
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(r, g, b) = Color.HsvToRgb(hue, saturation, value);
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// Convert linear back to SRGB and pre-multiply by the alpha
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return Color.FromLinear(original.A, r, g, b);
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}
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}
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}
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