/// <summary>
/// parse an PDS packet which contain palette info
/// </summary>
/// <param name="buffer">Buffer of raw byte data, starting right after segment</param>
/// <param name="segment">object containing info about the current segment</param>
/// <returns>number of valid palette entries (-1 for fault)</returns>
private static PdsData ParsePds(byte[] buffer, SupSegment segment)
{
int paletteId = buffer[0]; // 8bit palette ID (0..7)
// 8bit palette version number (incremented for each palette change)
int paletteUpdate = buffer[1];
var p = new PaletteInfo {
PaletteSize = (segment.Size - 2) / 5
};
if (p.PaletteSize <= 0)
{
return new PdsData {
Message = "Empty palette"
}
}
;
p.PaletteBuffer = new byte[p.PaletteSize * 5];
Buffer.BlockCopy(buffer, 2, p.PaletteBuffer, 0, p.PaletteSize * 5); // save palette buffer in palette object
return(new PdsData
{
Message = "PalId: " + paletteId + ", update: " + paletteUpdate + ", " + p.PaletteSize + " entries",
PaletteId = paletteId,
PaletteVersion = paletteUpdate,
PaletteInfo = p,
});
}
public PaletteInfo(PaletteInfo paletteInfo)
{
PaletteSize = paletteInfo.PaletteSize;
PaletteBuffer = new byte[paletteInfo.PaletteBuffer.Length];
Buffer.BlockCopy(paletteInfo.PaletteBuffer, 0, PaletteBuffer, 0, PaletteBuffer.Length);
}
