/// <summary>Reads the overlay.</summary>
private void ReadOverlay()
{
IniSection overlaySection = GetSection("OverlayPack");
if (overlaySection == null)
{
Logger.Info("OverlayPack section unavailable in {0}, overlay will be unavailable", Path.GetFileName(FileName));
return;
}
byte[] format80Data = Convert.FromBase64String(overlaySection.ConcatenatedValues());
var overlayPack = new byte[1 << 18];
Format5.DecodeInto(format80Data, overlayPack, 80);
IniSection overlayDataSection = GetSection("OverlayDataPack");
if (overlayDataSection == null)
{
Logger.Debug("OverlayDataPack section unavailable in {0}, overlay will be unavailable", Path.GetFileName(FileName));
return;
}
format80Data = Convert.FromBase64String(overlayDataSection.ConcatenatedValues());
var overlayDataPack = new byte[1 << 18];
Format5.DecodeInto(format80Data, overlayDataPack, 80);
for (int y = 0; y < FullSize.Height; y++)
{
for (int x = FullSize.Width * 2 - 2; x >= 0; x--)
{
var t = Tiles[x, y];
if (t == null)
{
continue;
}
int idx = t.Rx + 512 * t.Ry;
byte overlay_id = overlayPack[idx];
if (overlay_id != 0xFF)
{
byte overlay_value = overlayDataPack[idx];
var ovl = new Overlay(overlay_id, overlay_value);
ovl.Tile = t;
Overlays.Add(ovl);
}
}
}
Logger.Debug("Read {0} overlay types", Overlays.Count);
}