public static Bitmap GetLayer2(int room, int flags)
{
var rInfo = RoomInfo.RoomInfoEntries[room];
var rGfxPal = RoomGfxPal.RoomGfxPalEntries[room];
// Get the width and height (in 16*16 tiles)
int w = rInfo.Width;
int h = rInfo.Height;
// Create the bitmap
Bitmap bmp = new Bitmap(w << 4, h << 4, PixelFormat.Format8bppIndexed);
BitmapData bd = bmp.LockBits(ImageLockMode.WriteOnly);
// Get the graphics
var gfx = RoomGfx.GetTilesets(rGfxPal);
int hash = gfx.GetHashCode();
// Get the tiles
var tiles = RoomTiles.GetTiles(room);
if (tiles == null)
{
return(null);
}
// Get the map
var map = new byte[1][];
for (int i = 1; i < 2; i++)
{
map[i - 1] = RoomMap.GetMap(room, i);
}
// Get the palette
var pal = RoomPal.GetPalette(rGfxPal.Pal);
bmp.CopyPalette(pal, true);
// For each layer...
for (int layer = 1; layer >= 1; layer--)
{
// Check if it's in the flags for rendering this layer
if (((flags & (1 << layer)) != 0) && (map[layer - 1] != null))
{
// Make sure the map is big enough: some of them aren't!
if (map[layer - 1].Length >= (w * h * 2))
{
// We're drawing it, so for each entry in the map...
for (int mapy = 0; mapy < h; mapy++)
{
for (int mapx = 0; mapx < w; mapx++)
{
// Get the 16x16 tile number
ushort ch = map[layer - 1].ReadUShort((mapx + (mapy * w)) * 2);
ushort tile16 = (ushort)(ch & 0x3FF);
if ((tile16 >> 6) < 12)
{
int tpal = (ch >> 10) & 0xF;
bool tflipx = (ch & 0x4000) != 0;
bool tflipy = (ch & 0x8000) != 0;
// For this tile... get the four 8x8 subtiles
int[,] tile8 = new int[2, 2];
bool[,] sflipx = new bool[2, 2];
bool[,] sflipy = new bool[2, 2];
uint magic = tiles.ReadUInt(tile16 * 8);
tile8[0, 0] = tiles[(tile16 * 8) + 4];
tile8[0, 1] = tiles[(tile16 * 8) + 5];
tile8[1, 0] = tiles[(tile16 * 8) + 6];
tile8[1, 1] = tiles[(tile16 * 8) + 7];
for (int i = 0; i < 2; i++)
{
for (int j = 0; j < 2; j++)
{
sflipx[i, j] = (tile8[i, j] & 0x40) != 0;
sflipy[i, j] = (tile8[i, j] & 0x80) != 0;
tile8[i, j] &= 0x3F;
tile8[i, j] |= (ch & 0x3C0);
}
}
// magic appears to contain some sort of tile mask...
uint mask = (magic >> 16) & 0xF;
if ((mask & 0x1) == 0)
{
tile8[0, 0] = -1;
}
if ((mask & 0x2) == 0)
{
tile8[0, 1] = -1;
}
if ((mask & 0x4) == 0)
{
tile8[1, 0] = -1;
}
if ((mask & 0x8) == 0)
{
tile8[1, 1] = -1;
}
// For each of these subtiles...
for (int tiley = 0; tiley < 2; tiley++)
{
for (int tilex = 0; tilex < 2; tilex++)
{
if (tile8[tiley, tilex] >= 0)
{
int tileset = tile8[tiley, tilex] >> 6;
int subtile = tile8[tiley, tilex] & 0x3F;
int tileoffset = subtile << 5;
var pixels = gfx[tileset].Read4BppTile(tileoffset);
int tx = tflipx ? 1 - tilex : tilex;
int ty = tflipy ? 1 - tiley : tiley;
GfxProvider.RenderToBitmap(bd, pixels,
(mapx << 4) + (tx << 3),
(mapy << 4) + (ty << 3),
sflipx[tiley, tilex] ^ tflipx,
sflipy[tiley, tilex] ^ tflipy,
tpal, true);
}
}
}
}
}
}
}
}
}
bmp.UnlockBits(bd);
return(bmp);
}