static void Main(string[] args)
{
// This program works by having a file dragged onto it. If this program is launched without a file arg, exit
if (args.Length == 0)
{
return;
}
byte[] tm2file = File.ReadAllBytes(args[0]);
byte[] imageBuf = TM2ToBitMap.GetImageBuffer(tm2file);
TM2Header header = TM2Header.GetHeader(tm2file);
unsafe
{
fixed(byte *ptr = imageBuf)
{
using (Bitmap image = new Bitmap(header.Width, header.Height, header.Width * 4,
PixelFormat.Format32bppArgb, new IntPtr(ptr)))
{
image.Save(@"export.png");
}
}
}
}
public static TM2Header GetHeader(byte[] file)
{
// Read header of TM2 into struct
byte[] headerBuf = new byte[Marshal.SizeOf <TM2Header>()];
Array.Copy(file, headerBuf, headerBuf.Length);
GCHandle handle = GCHandle.Alloc(headerBuf, GCHandleType.Pinned);
TM2Header header = (TM2Header)Marshal.PtrToStructure(handle.AddrOfPinnedObject(), typeof(TM2Header));
handle.Free();
return(header);
}
public static byte[][] GetPalette(byte[] file, TM2Header header)
{
byte[][] result;
switch (header.TM2ImageFormat)
{
case TM2ImageFormat.Format8bbp:
result = getPalette8bbp(file, header);
break;
default:
throw new ArgumentException("Unimplemented image format");
}
return(result);
}
public static byte[] GetImageBuffer(byte[] tm2file)
{
TM2Header header = TM2Header.GetHeader(tm2file);
byte[][] palette = Palette.GetPalette(tm2file, header);
// TODO -- different images based on image type
byte[] imageBuf = new byte[4 * header.Width * header.Height];
for (int y = 0; y < header.Height; ++y)
{
for (int x = 0; x < header.Width; ++x)
{
byte c = tm2file[0x40 + GetAddress8BppSwizzle(header.Width, header.Height, x, y)];
Array.Copy(palette[c], 0, imageBuf, (x * 4) + (header.Width * y) * 4, 4);
}
}
return(imageBuf);
}
private static byte[][] getPalette8bbp(byte[] file, TM2Header header)
{
byte[][] palette = new byte[256][];
for (int i = 0; i < 256; ++i)
{
byte[] rgba = new byte[4];
Array.Copy(file, 0x40 + header.ImageSize + i * 4, rgba, 0, 4);
// Correct alpha channel (0-128) -> (0-255)
rgba[3] = (byte)(Math.Min((int)((int)rgba[3] << 1), 0xFF));
// Swap color channels (RGBA -> BGRA)
byte temp = rgba[2];
rgba[2] = rgba[0];
rgba[0] = temp;
palette[(i & 0xe7) | ((i & 0x10) >> 1) | ((i & 0x08) << 1)] = rgba;
}
return(palette);
}
