static void writeColorConversionPath(ColorInfo c1, ColorInfo c2)
{
var path = ColorDepthConverter.GetPath(c1, c2);
//var path = ColorDepthConverter.GetMostInexepnsiveConversionPath(c1, c2);
Console.Write("{0} => {1}: ", c1, c2);
Console.CursorLeft = 40;
//Console.Write("Cast: {0}", !ColorDepthConverter.ConversionPathCopiesData(path));
Console.CursorLeft = 55;
if (path.Count == 0)
{
Console.ForegroundColor = ConsoleColor.Red;
Console.WriteLine("NO PATH");
Console.ResetColor();
return;
}
else if (path.CopiesData() == false)
{
Console.ForegroundColor = ConsoleColor.Blue;
Console.WriteLine("cast");
Console.ResetColor();
return;
}
Console.ForegroundColor = ConsoleColor.Green;
foreach (var stage in path)
{
Console.Write("=> ({0} => {1})", stage.Source, stage.Destination);
}
Console.ResetColor();
Console.WriteLine();
}
/// <summary>
/// Returns if an image can be casted to UnmanagedImage without data copy.
/// </summary>
/// <param name="image">Generic image</param>
/// <returns>Is image cast-able to UnmanagedImage.</returns>
public static bool CanCastToAForgeImage(this IImage image)
{
ColorInfo[] preferedColors = BitmapConversionExtensions.PixelFormatMappings.Forward.ToArray();
var conversionPath = ColorDepthConverter.GetPath(image.ColorInfo, preferedColors);
bool isImageCopied = ColorDepthConverter.CopiesData(conversionPath);
return(!isImageCopied);
}
/// <summary>
/// Converts the image from source to destination color and depth.
/// Data may be shared if casting is used. To prevent that set <paramref name="copyAlways"/> to true.
/// </summary>
/// <param name="image">Image.</param>
/// <param name="destColor">Destination color info.</param>
/// <param name="copyAlways">Forces data copy even if a casting is enough.</param>
/// <param name="failIfCannotCast">If data copy is needed throws an exception.</param>
/// <returns>Converted image.</returns>
public static IImage Convert(this IImage image, ColorInfo destColor, bool copyAlways = false, bool failIfCannotCast = false)
{
if (image == null)
{
return(null);
}
var conversionPath = ColorDepthConverter.GetPath(image.ColorInfo, destColor);
if (conversionPath == null /*it should never be null*/ || conversionPath.Count == 0)
{
throw new Exception(String.Format("Image does not support conversion from {0} to {1}", image.ColorInfo.ColorType, destColor.ColorType));
}
if (failIfCannotCast && conversionPath.CopiesData() == true)
{
throw new Exception("Fail if cannot cast is set to true: Image data must be copied");
}
var convertedIm = ColorDepthConverter.Convert(image, conversionPath.ToArray(), copyAlways);
return(convertedIm);
}