Everything is now OpenRA, not OpenRa

OpenRA.Game/Graphics/Util.cs

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+#region Copyright & License Information
+/*
+ * Copyright 2007,2009,2010 Chris Forbes, Robert Pepperell, Matthew Bowra-Dean, Paul Chote, Alli Witheford.
+ * This file is part of OpenRA.
+ * 
+ *  OpenRA is free software: you can redistribute it and/or modify
+ *  it 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.
+ * 
+ *  OpenRA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ * 
+ *  You should have received a copy of the GNU General Public License
+ *  along with OpenRA.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#endregion
+
+using System;
+using System.Collections.Generic;
+using System.Drawing;
+using System.Drawing.Imaging;
+using System.IO;
+using OpenRA.FileFormats.Graphics;
+
+namespace OpenRA.Graphics
+{
+	static class Util
+	{
+		public static string[] ReadAllLines(Stream s)
+		{
+			List<string> result = new List<string>();
+			using (StreamReader reader = new StreamReader(s))
+				while(!reader.EndOfStream)
+				{
+					var line = reader.ReadLine();
+					if( !string.IsNullOrEmpty( line ) && line[0] != '#' )
+						result.Add( line );
+				}
+
+			return result.ToArray();
+		}
+
+		public static T[] MakeArray<T>(int count, Converter<int, T> f)
+		{
+			T[] result = new T[count];
+			for (int i = 0; i < count; i++)
+				result[i] = f(i);
+
+			return result;
+		}
+
+		static float[] channelSelect = { 0.75f, 0.25f, -0.25f, -0.75f };
+
+		public static void FastCreateQuad(Vertex[] vertices, ushort[] indices, float2 o, Sprite r, int palette, int nv, int ni, float2 size)
+		{
+			var attrib = new float2(palette / (float)HardwarePalette.MaxPalettes, channelSelect[(int)r.channel]);
+
+			vertices[nv] = new Vertex(o, 
+				r.FastMapTextureCoords(0), attrib);
+			vertices[nv + 1] = new Vertex(new float2(o.X + size.X, o.Y), 
+				r.FastMapTextureCoords(1), attrib);
+			vertices[nv + 2] = new Vertex(new float2(o.X, o.Y + size.Y), 
+				r.FastMapTextureCoords(2), attrib);
+			vertices[nv + 3] = new Vertex(new float2(o.X + size.X, o.Y + size.Y), 
+				r.FastMapTextureCoords(3), attrib);
+
+			indices[ni] = (ushort)(nv);
+			indices[ni + 1] = indices[ni + 3] = (ushort)(nv + 1);
+			indices[ni + 2] = indices[ni + 5] = (ushort)(nv + 2);
+			indices[ni + 4] = (ushort)(nv + 3);
+		}
+
+		public static void FastCopyIntoChannel(Sprite dest, byte[] src)
+		{
+			var bitmap = dest.sheet.Bitmap;
+			BitmapData bits = null;
+			uint[] channelMasks = { 0x00ff0000, 0x0000ff00, 0x000000ff, 0xff000000 };
+			int[] shifts = { 16, 8, 0, 24 };
+
+			uint mask = channelMasks[(int)dest.channel];
+			int shift = shifts[(int)dest.channel];
+
+			try
+			{
+				bits = bitmap.LockBits(dest.bounds, ImageLockMode.ReadWrite, PixelFormat.Format32bppArgb);
+
+				int width = dest.bounds.Width;
+				int height = dest.bounds.Height;
+
+				unsafe
+				{
+					fixed (byte* srcbase = &src[0])
+					{
+						byte* s = srcbase;
+						uint* t = (uint*)bits.Scan0.ToPointer();
+						int stride = bits.Stride >> 2;
+
+						for (int j = 0; j < height; j++)
+						{
+							uint* p = t;
+							for (int i = 0; i < width; i++, p++)
+								*p = (*p & ~mask) | ((mask & ((uint)*s++) << shift));
+							t += stride;
+						}
+					}
+				}
+			}
+			finally
+			{
+				bitmap.UnlockBits(bits);
+			}
+		}
+
+		public static Color Lerp(float t, Color a, Color b)
+		{
+			return Color.FromArgb(
+				LerpChannel(t, a.A, b.A),
+				LerpChannel(t, a.R, b.R),
+				LerpChannel(t, a.G, b.G),
+				LerpChannel(t, a.B, b.B));
+		}
+
+		public static int LerpChannel(float t, int a, int b)
+		{
+			return (int)((1 - t) * a + t * b);
+		}
+	}
+}