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resource_v3.cpp

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2001  Ludvig Strigeus
 * Copyright (C) 2001-2004 The ScummVM project
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.

 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/scumm/resource_v3.cpp,v 1.28 2004/09/29 09:47:38 fingolfin Exp $
 *
 */

#include "stdafx.h"
#include "scumm/scumm.h"
#include "scumm/intern.h"
#include "scumm/resource.h"

namespace Scumm {

void ScummEngine_v3::readIndexFile() {
      if (_features & GF_OLD_BUNDLE) {
            int magic = 0;
            debug(9, "readIndexFile()");

            closeRoom();
            openRoom(0);

            magic = _fileHandle.readUint16LE();
            if (magic != 0x0100)
                  warning("The magic id doesn't match (0x%X)", magic);

            _numGlobalObjects = _fileHandle.readUint16LE();
            _fileHandle.seek(_numGlobalObjects * 4, SEEK_CUR);
            _numRooms = _fileHandle.readByte();
            _fileHandle.seek(_numRooms * 3, SEEK_CUR);
            _numCostumes = _fileHandle.readByte();
            _fileHandle.seek(_numCostumes * 3, SEEK_CUR);
            _numScripts = _fileHandle.readByte();
            _fileHandle.seek(_numScripts * 3, SEEK_CUR);
            _numSounds = _fileHandle.readByte();

            _fileHandle.clearIOFailed();
            _fileHandle.seek(0, SEEK_SET);

            readMAXS();

            // Jamieson630: palManipulate variable initialization
            _palManipCounter = 0;
            _palManipPalette = 0; // Will allocate when needed
            _palManipIntermediatePal = 0; // Will allocate when needed

            _fileHandle.readUint16LE(); /* version magic number */
            readGlobalObjects();
            readResTypeList(rtRoom, MKID('ROOM'), "room");
            readResTypeList(rtCostume, MKID('COST'), "costume");
            readResTypeList(rtScript, MKID('SCRP'), "script");
            readResTypeList(rtSound, MKID('SOUN'), "sound");

            closeRoom();
      } else {
            uint16 blocktype;
            uint32 itemsize;
            int numblock = 0;

            debug(9, "readIndexFile()");

            closeRoom();
            openRoom(0);

            while (!_fileHandle.eof()) {
                  itemsize = _fileHandle.readUint32LE();
                  blocktype = _fileHandle.readUint16LE();
                  if (_fileHandle.ioFailed())
                        break;

                  switch (blocktype) {
                  case 0x4E52:      // 'NR'
                        _fileHandle.readUint16LE();
                        break;
                  case 0x5230:      // 'R0'
                        _numRooms = _fileHandle.readUint16LE();
                        break;
                  case 0x5330:      // 'S0'
                        _numScripts = _fileHandle.readUint16LE();
                        break;
                  case 0x4E30:      // 'N0'
                        _numSounds = _fileHandle.readUint16LE();
                        break;
                  case 0x4330:      // 'C0'
                        _numCostumes = _fileHandle.readUint16LE();
                        break;
                  case 0x4F30:      // 'O0'
                        _numGlobalObjects = _fileHandle.readUint16LE();
                        break;
                  }
                  _fileHandle.seek(itemsize - 8, SEEK_CUR);
            }

            _fileHandle.clearIOFailed();
            _fileHandle.seek(0, SEEK_SET);

            readMAXS();

            // Jamieson630: palManipulate variable initialization
            _palManipCounter = 0;
            _palManipPalette = 0; // Will allocate when needed
            _palManipIntermediatePal = 0; // Will allocate when needed

            while (1) {
                  itemsize = _fileHandle.readUint32LE();

                  if (_fileHandle.ioFailed())
                        break;

                  blocktype = _fileHandle.readUint16LE();

                  numblock++;

                  switch (blocktype) {

                  case 0x4E52:      // 'NR'
                        _fileHandle.seek(itemsize - 6, SEEK_CUR);
                        break;

                  case 0x5230:      // 'R0'
                        readResTypeList(rtRoom, MKID('ROOM'), "room");
                        break;

                  case 0x5330:      // 'S0'
                        readResTypeList(rtScript, MKID('SCRP'), "script");
                        break;

                  case 0x4E30:      // 'N0'
                        readResTypeList(rtSound, MKID('SOUN'), "sound");
                        break;

                  case 0x4330:      // 'C0'
                        readResTypeList(rtCostume, MKID('COST'), "costume");
                        break;

                  case 0x4F30:      // 'O0'
                        readGlobalObjects();
                        break;

                  default:
                        // FIXME: this is a little hack because Indy3 FM-TOWNS has
                        // 32 extra bytes of unknown meaning appended to 00.LFL
                        if (!(_gameId == GID_INDY3 && _features & GF_FMTOWNS))
                              error("Bad ID %c%c found in directory!", blocktype & 0xFF, blocktype >> 8);
                        return;
                  }
            }
            closeRoom();
      }
}

void ScummEngine_v3::loadCharset(int no) {
      uint32 size;
      memset(_charsetData, 0, sizeof(_charsetData));

      if (_gameId == GID_ZAK256)
            checkRange(2, 0, no, "Loading illegal charset %d");
      else
            checkRange(4, 0, no, "Loading illegal charset %d");
      closeRoom();

      File file;
      char buf[20];

      sprintf(buf, "%02d.LFL", 99 - no);
      
      file.open(buf);
            
      if (file.isOpen() == false) {
            error("loadCharset(%d): Missing file charset: %s", no, buf);
      }
            
      size = file.readUint16LE();
      file.read(createResource(rtCharset, no, size), size);
            
      file.close();
}

void ScummEngine_v3::readMAXS() {
      // FIXME - I'm not sure for those values yet, they will have to be rechecked

      _numVariables = 800;                      // 800
      _numBitVariables = 4096;                  // 2048
      _numLocalObjects = 200;                   // 200
      _numArray = 50;
      _numVerbs = 100;
      _numNewNames = 50;
      _objectRoomTable = NULL;
      _numCharsets = 9;                         // 9
      _numInventory = 80;                             // 80
      _numGlobalScripts = 200;
      _numFlObject = 50;

      _shadowPaletteSize = 256;

      _shadowPalette = (byte *) calloc(_shadowPaletteSize, 1);    // FIXME - needs to be removed later
      allocateArrays();
}

void ScummEngine_v3::readGlobalObjects() {
      int num = _fileHandle.readUint16LE();
      assert(num == _numGlobalObjects);
      for (int i = 0; i != num; i++) {
            uint32 bits = _fileHandle.readByte();
            byte tmp;
            bits |= _fileHandle.readByte() << 8;
            bits |= _fileHandle.readByte() << 16;
            _classData[i] = bits;
            tmp = _fileHandle.readByte();
            _objectOwnerTable[i] = tmp & OF_OWNER_MASK;
            _objectStateTable[i] = tmp >> OF_STATE_SHL;
      }
}

} // End of namespace Scumm

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