///////////////////////////////////////////////////////////
// Function type: I/O
// Contributors: Pokedude
// Last edit by: Pokedude
// Date of edit: 6/15/2016
//
///////////////////////////////////////////////////////////
bool MapBank::read(const qboy::Rom &rom, UInt32 offset, UInt32 next)
{
if (!rom.seek(offset))
AME_THROW(BNK_ERROR_OFFSET, rom.redirected());
// User can choose whether to retrieve the map-count
// on a fast or accurate way (horiz. slider)
// Level 0: Checks for next bank and ptr validity +
// Level 1: Checks for ptr validity within the map header +
// Level 2: Checks for ptr validity within the layout header +
// Level 3: Checks for ptr validity within the events +
// Level 4: Checks certain properties in tilesets and events
int accLevel = SETTINGS(MapAccuracyLevel);
// Retrieves the map count through various checks
while (true)
{
if (!rom.seek(offset + (++m_Count) * 4))
AME_THROW(BNK_ERROR_WHILE, offset + m_Count * 4);
// ============= LEVEL 0 =============
// Checks if current offset is start of bank table
if (rom.offset() == CONFIG(MapBanks))
break;
// Checks if current offset is next bank
if (rom.offset() == next)
break;
// Checks if map pointer is valid
unsigned map = rom.readPointer();
if (!rom.seek(map))
break;
// ============= LEVEL 1 =============
if (accLevel == 0)
continue;
// Checks if the layout header and event pointers are valid
unsigned footer = rom.readPointer();
if (!rom.checkOffset(footer))
break;
unsigned events = rom.readPointer();
if (!rom.checkOffset(events))
break;
// ============= LEVEL 2 =============
if (accLevel == 1)
continue;
// Checks if the border, blocks, primary and secondary pointers are valid
rom.seek(footer);
rom.readWord();
rom.readWord();
if (!rom.checkOffset(rom.readPointer()))
break;
if (!rom.checkOffset(rom.readPointer()))
break;
unsigned primary = rom.readPointer();
if (!rom.checkOffset(primary))
break;
unsigned secondary = rom.readPointer();
if (!rom.checkOffset(secondary))
break;
// ============= LEVEL 3 =============
if (accLevel == 2)
continue;
// Checks if the npc, warp, trigger and sign pointers are valid
// Events are not necessary for a map
if (events)
{
rom.seek(events);
rom.readWord();
if (!rom.checkOffset(rom.readPointer()))
break;
if (!rom.checkOffset(rom.readPointer()))
break;
if (!rom.checkOffset(rom.readPointer()))
break;
if (!rom.checkOffset(rom.readPointer()))
break;
}
// ============= LEVEL 4 =============
if (accLevel == 3)
continue;
// Checks the first two tileset settings
rom.seek(primary);
if (rom.readByte() >= 2) // compression can only be 0/1
break;
if (rom.readByte() != 0) // must be primary tileset!
break;
rom.seek(secondary);
if (rom.readByte() >= 2) // compression can only be 0/1
break;
if (rom.readByte() != 1) // must be secondary tileset!
break;
}
// Now attempts to read all the maps
for (int i = 0; i < m_Count; i++)
{
rom.seek(offset + i * 4);
// Retrieves the pointer to the map
Map *map = new Map;
UInt32 mapOff = rom.readPointerRef();
// Attempts to read the map
if (!map->read(rom, mapOff))
{
delete map;
return false;
}
m_Maps.push_back(map);
}
// Loading successful
m_Offset = offset;
return true;
}
///////////////////////////////////////////////////////////
// Function type: I/O
// Contributors: Pokedude
// Last edit by: Pokedude
// Date of edit: 6/11/2016
//
///////////////////////////////////////////////////////////
bool MapHeader::read(const qboy::Rom &rom, UInt32 offset)
{
if (!rom.seek(offset))
AME_THROW(HDR_ERROR_OFFSET, rom.redirected());
// Reads the map's dimensions
m_Width = rom.readWord();
m_Height = rom.readWord();
// Reads all the pointers within the structure
m_PtrBorder = rom.readPointerRef();
m_PtrBlocks = rom.readPointer();
m_PtrPrimary = rom.readPointerRef();
m_PtrSecondary = rom.readPointerRef();
// Determines whether these pointers are valid
if (!rom.checkOffset(m_PtrBorder))
AME_THROW(HDR_ERROR_BORDER, offset + 8);
if (!rom.checkOffset(m_PtrBlocks))
AME_THROW(HDR_ERROR_BLOCKS, offset + 12);
if (!rom.checkOffset(m_PtrPrimary))
AME_THROW(HDR_ERROR_PRIMARY, offset + 16);
if (!rom.checkOffset(m_PtrSecondary))
AME_THROW(HDR_ERROR_SECONDARY, offset + 20);
// Retrieves the border (different between games!)
if (rom.info().isFRLG())
{
QSize borderSize(rom.readByte(), rom.readByte());
m_Border.read(rom, m_PtrBorder, borderSize);
}
else
{
m_Border.read(rom, m_PtrBorder, QSize(2, 2));
}
// Retrieves the map block data
rom.seek(m_PtrBlocks);
for (unsigned i = 0; i < m_Width * m_Height; i++)
{
MapBlock *block = new MapBlock;
UInt16 data = rom.readHWord();
block->block = (data & 0x3FF);
block->permission = (data >> 0xA);
m_Blocks.push_back(block);
}
// Loads the tilesets, if necessary
if ((m_Primary = TilesetManager::get(m_PtrPrimary)) == NULL)
{
m_Primary = new Tileset;
m_Primary->read(rom, m_PtrPrimary);
TilesetManager::add(m_Primary);
}
if ((m_Secondary = TilesetManager::get(m_PtrSecondary)) == NULL)
{
m_Secondary = new Tileset;
m_Secondary->read(rom, m_PtrSecondary);
TilesetManager::add(m_Secondary);
}
// Loading successful
return true;
}
///////////////////////////////////////////////////////////
// Function type: I/O
// Contributors: Pokedude, Diegoisawesome
// Last edit by: Diegoisawesome
// Date of edit: 7/3/2016
//
///////////////////////////////////////////////////////////
bool MapLayoutTable::read(const qboy::Rom &rom, UInt32 offset)
{
if (!rom.seek(offset))
AME_THROW(LAY_ERROR_OFFSET, rom.redirected());
// Checks for ptr validity within the layout header and
// certain properties in tilesets
// Retrieves the map count through various checks
while (true)
{
if (!rom.seek(offset + (++m_Count) * 4))
AME_THROW(LAY_ERROR_WHILE, offset + m_Count * 4);
unsigned layout = rom.readPointer();
if (layout == 0)
continue;
if (!rom.seek(layout))
break;
// Checks if the border, blocks, primary and secondary pointers are valid
rom.readWord();
rom.readWord();
if (!rom.checkOffset(rom.readPointer()))
break;
if (!rom.checkOffset(rom.readPointer()))
break;
unsigned primary = rom.readPointer();
if (!rom.checkOffset(primary))
break;
unsigned secondary = rom.readPointer();
if (!rom.checkOffset(secondary))
break;
/*
// Checks the first two tileset settings
rom.seek(primary);
if (rom.readByte() >= 2) // compression can only be 0/1
break;
if (rom.readByte() != 0) // must be primary tileset!
break;
rom.seek(secondary);
if (rom.readByte() >= 2) // compression can only be 0/1
break;
if (rom.readByte() != 1) // must be secondary tileset!
break;*/
}
// Now attempts to read all the maps
for (int i = 0; i < m_Count; i++)
{
rom.seek(offset + i * 4);
// Retrieves the pointer to the map
MapHeader *mapHeader = new MapHeader;
UInt32 mapOff = rom.readPointerRef();
// Attempts to read the map layout
if (mapOff != 0 && !mapHeader->read(rom, mapOff))
{
delete mapHeader;
return false;
}
m_MapHeaders.push_back(mapHeader);
}
// Loading successful
m_Offset = offset;
return true;
}
