61 lines
1.7 KiB
C#
61 lines
1.7 KiB
C#
#region Copyright & License Information
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/*
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* Copyright 2007-2020 The OpenRA Developers (see AUTHORS)
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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.Collections.Generic;
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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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Dictionary<int, Color> remapColors;
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public static int GetRemapIndex(int[] ramp, int i)
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{
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return ramp[i];
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}
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public PlayerColorRemap(int[] ramp, Color c, float rampFraction)
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{
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var h = c.GetHue() / 360.0f;
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var s = c.GetSaturation();
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var l = c.GetBrightness();
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// Increase luminosity if required to represent the full ramp
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var rampRange = (byte)((1 - rampFraction) * l);
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var c1 = Color.FromAhsl(h, s, Math.Max(rampRange, l));
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var c2 = Color.FromAhsl(h, s, (byte)Math.Max(0, l - rampRange));
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var baseIndex = ramp[0];
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var remapRamp = ramp.Select(r => r - ramp[0]);
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var rampMaxIndex = ramp.Length - 1;
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// reversed remapping
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if (ramp[0] > ramp[rampMaxIndex])
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{
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baseIndex = ramp[rampMaxIndex];
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for (var i = rampMaxIndex; i > 0; i--)
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remapRamp = ramp.Select(r => r - ramp[rampMaxIndex]);
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}
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remapColors = remapRamp.Select((x, i) => (baseIndex + i, Exts.ColorLerp(x / (float)ramp.Length, c1, c2)))
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.ToDictionary(u => u.Item1, u => u.Item2);
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}
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public Color GetRemappedColor(Color original, int index)
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{
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return remapColors.TryGetValue(index, out var c)
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? c : original;
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}
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}
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}
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