private void DrawFileSelectHash()
{
// apply tweak for hash icons
Patch.Apply(rom, Resources.ZM_U_hashIcons);
// compute the hash based on settings and seed
string s = settings.GetString() + seed;
byte[] bytes = Encoding.ASCII.GetBytes(s);
int hash = 5381;
foreach (byte b in bytes)
{
hash = (hash << 5) + hash + b;
}
const int palPtr = 0x7C7CC;
const int gfxPtr = 0x7C7E0;
const int tmPtr = 0x7C80C;
// get palette, graphics, and tile table
int palOffset = rom.ReadPtr(palPtr);
Palette filePal = new Palette(rom, palOffset, 7, palPtr);
Gfx fileGfx = new Gfx(rom, gfxPtr, 32);
Tilemap fileTm = new Tilemap(rom, tmPtr, true);
for (int i = 0; i < 4; i++)
{
int index = hash & 15;
hash >>= 4;
ItemType item = (index + ItemType.Super);
// modify palette
filePal.AppendPalette(item.AbilityPalette());
// modify graphics
Gfx itemGfx = item.AbilityGraphics();
Rectangle rect = new Rectangle(0, 0, 2, 2);
fileGfx.AddGfx(itemGfx, rect, i * 3, 17);
// modify tile table
int x = 9 + i * 3;
int pal = i + 7;
fileTm.SetPalette(pal, x, 1);
fileTm.SetPalette(pal, x, 2);
fileTm.SetPalette(pal, x + 1, 1);
fileTm.SetPalette(pal, x + 1, 2);
fileTm.SetTileNumber(0, x + 2, 1);
fileTm.SetTileNumber(0, x + 2, 2);
}
// write palette, graphics, and tile table
filePal.Write();
fileGfx.Write();
fileTm.Write();
}