55 lines
1.2 KiB
C#
55 lines
1.2 KiB
C#
using System.Drawing;
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using OpenRa.Game.Graphics;
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namespace OpenRa.Game.Traits
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{
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class ChronoshiftPaletteEffect : IPaletteModifier, ITick
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{
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const int chronoEffectLength = 20;
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int remainingFrames;
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public ChronoshiftPaletteEffect(Actor self) { }
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public void DoChronoshift()
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{
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remainingFrames = chronoEffectLength;
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}
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public void Tick(Actor self)
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{
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if (remainingFrames > 0)
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remainingFrames--;
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}
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public void AdjustPalette(Bitmap b)
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{
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if (remainingFrames == 0)
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return;
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var frac = (float)remainingFrames / chronoEffectLength;
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for( var y = 0; y < (int)PaletteType.Chrome; y++ )
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for (var x = 0; x < 256; x++)
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{
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var orig = b.GetPixel(x, y);
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var lum = (int)(255 * orig.GetBrightness());
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var desat = Color.FromArgb(orig.A, lum, lum, lum);
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b.SetPixel(x, y, Lerp(frac, orig, desat));
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}
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}
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static Color Lerp(float t, Color a, Color b)
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{
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return Color.FromArgb(
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LerpChannel(t, a.A, b.A),
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LerpChannel(t, a.R, b.R),
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LerpChannel(t, a.G, b.G),
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LerpChannel(t, a.B, b.B));
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}
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static int LerpChannel(float t, int a, int b)
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{
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return (int)((1 - t) * a + t * b);
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}
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}
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}
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