void ReadFrom(Stream s)
{
using (var br = new BinaryReader(s))
{
// Hashes
var hashCount = br.ReadInt32();
m_HashToFileMap = new Dictionary <Hash128, string>();
for (var i = 0; i < hashCount; ++i)
{
var hash = Hash128.Parse(br.ReadString());
var value = br.ReadString();
m_HashToFileMap[hash] = value;
}
// Images data
var imageDataCount = br.ReadInt32();
imagesData = new List <ImageData>(imageDataCount);
m_AssetPathToIndex = new Dictionary <string, int>();
for (var i = 0; i < imageDataCount; ++i)
{
var guid = Hash128.Parse(br.ReadString());
var imageData = new ImageData(guid);
var nbColor = br.ReadInt32();
imageData.bestColors = new ColorInfo[nbColor];
for (var j = 0; j < nbColor; ++j)
{
var colorInfo = new ColorInfo();
colorInfo.color = br.ReadUInt32();
colorInfo.ratio = br.ReadDouble();
imageData.bestColors[j] = colorInfo;
}
var nbShades = br.ReadInt32();
imageData.bestShades = new ColorInfo[nbShades];
for (var j = 0; j < nbShades; ++j)
{
var colorInfo = new ColorInfo();
colorInfo.color = br.ReadUInt32();
colorInfo.ratio = br.ReadDouble();
imageData.bestShades[j] = colorInfo;
}
ReadHistogram(imageData.histogram.valuesR, br);
ReadHistogram(imageData.histogram.valuesG, br);
ReadHistogram(imageData.histogram.valuesB, br);
imagesData.Add(imageData);
var assetPath = m_HashToFileMap[guid];
m_AssetPathToIndex.Add(assetPath, i);
}
}
}
public static void ComputeBestColorsAndHistogram(Color32[] pixels, ColorInfo[] bestColors, ColorInfo[] bestShades, Histogram histogram)
{
var nbPixels = pixels.Length;
var colorMap = new Dictionary <uint, long>();
var rgbClusters = new RGBClusters();
foreach (var pixel in pixels)
{
var pixelValue = ColorToInt(pixel);
histogram.AddPixel(pixel);
if (!colorMap.ContainsKey(pixelValue))
{
colorMap.Add(pixelValue, 0);
}
++colorMap[pixelValue];
rgbClusters.AddColor(pixel);
}
histogram.Normalize(nbPixels);
// Get the best colors
var orderedColors = colorMap.ToList();
// Order in reverse order so highest count is first
orderedColors.Sort((pair1, pair2) => pair2.Value.CompareTo(pair1.Value));
var bestOrderedColors = orderedColors.Take(5).ToList();
var bestClusters = rgbClusters.GetBestClusters(5).ToList();
for (var i = bestOrderedColors.Count; i < 5; ++i)
{
bestOrderedColors.Add(new KeyValuePair <uint, long>(0, 0));
}
for (var i = 0; i < 5; ++i)
{
bestColors[i] = new ColorInfo {
color = bestOrderedColors[i].Key, ratio = bestOrderedColors[i].Value / (double)nbPixels
};
bestShades[i] = new ColorInfo {
color = ColorToInt(bestClusters[i].average), ratio = bestClusters[i].count / (double)nbPixels
};
}
}