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();
}
public byte AddAbility(ItemType item)
{
byte animGfxNum = (byte)(Rom.NumOfAnimGfx + item - ItemType.Long);
// find empty spot in palette
int palRow = 15;
for (int r = 1; r < 14; r++)
{
ushort color = palette.GetColor(r, 1);
bool blank = true;
for (int c = 2; c < 16; c++)
{
if (palette.GetColor(r, c) != color)
{
blank = false;
break;
}
}
if (blank)
{
Palette itemPal = item.AbilityPalette();
palette.CopyRows(itemPal, 0, r, 1);
palRow = r + 2;
break;
}
}
// find empty spot in animGfx
int animGfxSlot = 0;
for (int i = 0; i < 0x10; i++)
{
if (animTileset[i * 3] == 0)
{
animTileset[i * 3] = animGfxNum;
animGfxSlot = i;
break;
}
}
// find empty spot in tile table
int blockNum = 0x4C;
int tileVal = 0x40;
for (int i = 0x4C; i < 0x50; i++)
{
int offset = i * 4 + 1;
if (tilemap[offset] == 0x40 && tilemap[offset + 1] == 0x40 &&
tilemap[offset + 2] == 0x40 && tilemap[offset + 3] == 0x40)
{
tileVal = (palRow << 12) | (animGfxSlot * 4);
tilemap[offset] = (ushort)tileVal;
tilemap[offset + 1] = (ushort)(tileVal + 1);
tilemap[offset + 2] = (ushort)(tileVal + 2);
tilemap[offset + 3] = (ushort)(tileVal + 3);
blockNum = i;
break;
}
}
// fix Tilemap400
int tm400Offset = rom.Tilemap400Offset + (0xD0 + item - ItemType.Long) * 8;
rom.Write16(tm400Offset, (ushort)tileVal);
rom.Write16(tm400Offset + 2, (ushort)(tileVal + 1));
rom.Write16(tm400Offset + 4, (ushort)(tileVal + 2));
rom.Write16(tm400Offset + 6, (ushort)(tileVal + 3));
return((byte)blockNum);
}