/// <summary>
/// Converts an Enumerable of colors into a byte[].
/// Palette will be written before the image data
/// </summary>
/// <param name="colors"></param>
/// <returns></returns>
public byte[] Save(IEnumerable <Color> colors)
{
var redColors = CreatePalette(colors.ToList());
paletteBytes = (paletteFormat == null) ? null : paletteFormat.Save(redColors);
var alphaShift = indexSize;
var ms = new MemoryStream();
using (var bw = new BinaryWriterX(ms, true, byteOrder))
{
foreach (var color in colors)
{
switch (BitDepth)
{
case 8:
byte b = (byte)(Support.Support.ChangeBitDepth(color.A, 8, alpha) << alphaShift);
bw.Write((byte)(b | redColors.FindIndex(c => c == color)));
break;
default:
throw new Exception($"BitDepth {BitDepth} not supported!");
}
}
}
return(ms.ToArray());
}
public (byte[] indexData, byte[] paletteData) Save(IEnumerable <IndexData> indeces, IList <Color> palette)
{
var ms = new MemoryStream();
using (var bw = new BinaryWriterX(ms, true, _byteOrder))
{
foreach (var indexData in indeces)
{
switch (_indexDepth)
{
case 4:
bw.WriteNibble(indexData.Index);
break;
case 8:
bw.Write((byte)indexData.Index);
break;
default:
throw new Exception($"IndexDepth {_indexDepth} not supported!");
}
}
}
return(ms.ToArray(), _paletteFormat.Save(palette));
}