private static void Setup(Bitmap image, QuantizeImageSettings settings)
{
// Check arguments
if (settings.Quantizer.UsesColorCache && settings.ColorCache == null)
{
throw new ArgumentNullException(nameof(settings.ColorCache));
}
if (settings.Quantizer.AllowParallel && settings.ParallelCount <= 0)
{
throw new ArgumentOutOfRangeException(nameof(settings.ParallelCount));
}
if (settings.Quantizer.UsesVariableColorCount && settings.ColorCount <= 0)
{
throw new ArgumentOutOfRangeException(nameof(settings.ColorCount));
}
// Prepare objects
settings.Ditherer?.Prepare(settings.Quantizer, image.Width, image.Height);
settings.ColorCache?.Prepare(settings.ColorModel);
if (settings.Quantizer.UsesColorCache)
{
settings.Quantizer.SetColorCache(settings.ColorCache);
}
if (settings.Quantizer.UsesVariableColorCount)
{
settings.Quantizer.SetColorCount(settings.ColorCount);
}
if (settings.Quantizer.AllowParallel)
{
settings.Quantizer.SetParallelTasks(settings.ParallelCount);
}
}
public static (IEnumerable <int> indeces, IList <Color> palette) Quantize(Bitmap image, QuantizeImageSettings settings)
{
Setup(image, settings);
var colors = Decompose(image);
var indices = settings.Ditherer?.Process(colors) ?? settings.Quantizer.Process(colors);
return(indices, settings.Quantizer.GetPalette());
}
