public RomData(RomIO rom)
{
Rom = rom ?? throw new ArgumentOutOfRangeException(nameof(rom));
if (Rom.HeaderlessSize < 0x200000)
{
throw new ArgumentException(
"ROM data size is insufficient.");
}
AreaLoader = new AreaLoader(this);
PaletteData = new PaletteData(this);
GfxData = new GfxData(this);
AreaBg2Map = new AreaBg2Map(this);
Map16Data = new Obj16Tile[0x200];
var offsets = new byte[] { 0x00, 0x40, 0x80, 0xC0 };
var sizes = new byte[] { 0x2B, 0x38, 0x0E, 0x3E };
for (var i = 0; i < 4; i++)
{
var low = Rom.ReadByte(Map16DataLowByteAddress + i);
var high = Rom.ReadByte(Map16DataHighByteAddress + i);
var address = 0x030000 | (high << 8) | low;
var tiles = Rom.ReadBytes(address, sizes[i] << 3, true);
unsafe
{
fixed(byte *src = tiles)
fixed(Obj16Tile * dest = Map16Data)
{
Buffer.MemoryCopy(
src,
dest + offsets[i],
0x800,
tiles.Length);
}
}
}
TilemapLoader = new TilemapLoader(this);
AreaObjectRenderer = new AreaObjectRenderer(AreaObjectLoader);
AreaSpriteRenderer = new AreaSpriteRenderer(AreaSpriteLoader);
AreaNumber = AreaLoader.GetAreaNumber(0, 0);
}
public Obj16Tile[] GetTileSet(int areaIndex)
{
var result = new Obj16Tile[0x100];
var resultSizeInBytes = result.Length * Obj16Tile.SizeOf;
var address = GetTileMapAddress(areaIndex);
var bytes = Rom.ReadBytes(address, resultSizeInBytes);
unsafe
{
fixed(byte *src = bytes)
fixed(Obj16Tile * dest = result)
{
Buffer.MemoryCopy(
src,
dest,
resultSizeInBytes,
bytes.Length);
}
}
return(result);
}
