Initial Commit

Charts/NaiveColorMap.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Windows;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using Microsoft.Research.DynamicDataDisplay.Common.Auxiliary;
+using Microsoft.Research.DynamicDataDisplay.Common.Palettes;
+using Microsoft.Research.DynamicDataDisplay.DataSources;
+
+namespace Microsoft.Research.DynamicDataDisplay.Charts
+{
+	public class NaiveColorMap
+	{
+		public double[,] Data { get; set; }
+
+		public IPalette Palette { get; set; }
+
+		public BitmapSource BuildImage()
+		{
+			if (Data == null)
+				throw new ArgumentNullException("Data");
+			if (Palette == null)
+				throw new ArgumentNullException("Palette");
+
+
+			int width = Data.GetLength(0);
+			int height = Data.GetLength(1);
+
+			int[] pixels = new int[width * height];
+
+			var minMax = Data.GetMinMax();
+			var min = minMax.Min;
+			var rangeDelta = minMax.GetLength();
+
+			int pointer = 0;
+			for (int iy = 0; iy < height; iy++)
+			{
+				for (int ix = 0; ix < width; ix++)
+				{
+					double value = Data[ix, height - 1 - iy];
+					double ratio = (value - min) / rangeDelta;
+					Color color = Palette.GetColor(ratio);
+					int argb = color.ToArgb();
+
+					pixels[pointer++] = argb;
+				}
+			}
+
+			WriteableBitmap bitmap = new WriteableBitmap(width, height, 96, 96, PixelFormats.Pbgra32, null);
+			int bpp = (bitmap.Format.BitsPerPixel + 7) / 8;
+			int stride = bitmap.PixelWidth * bpp;
+
+			bitmap.WritePixels(new Int32Rect(0, 0, width, height), pixels, stride, 0);
+
+			return bitmap;
+		}
+	}
+}