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