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resource_v4.cpp

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2001  Ludvig Strigeus
 * Copyright (C) 2001-2005 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $Header: /cvsroot/scummvm/scummvm/scumm/resource_v4.cpp,v 1.27.2.2 2005/10/28 04:30:47 kirben Exp $
 *
 */

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

namespace Scumm {

void ScummEngine_v4::readIndexFile() {
      uint16 blocktype;
      uint32 itemsize;
      int numblock = 0;

      debug(9, "readIndexFile()");

      closeRoom();
      openRoom(0);

      while (!_fileHandle->eof()) {
            // Figure out the sizes of various resources
            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(0);
      allocateArrays();

      while (1) {
            itemsize = _fileHandle->readUint32LE();

            if (_fileHandle->ioFailed())
                  break;

            blocktype = _fileHandle->readUint16LE();

            numblock++;

            switch (blocktype) {

            case 0x4E52:      // 'NR'
                  // Names of rooms. Maybe we should put them into a table, for use by the debugger?
                  for (int room; (room = _fileHandle->readByte()); ) {
                        char buf[10];
                        _fileHandle->read(buf, 9);
                        buf[9] = 0;
                        for (int i = 0; i < 9; i++)
                              buf[i] ^= 0xFF;
                        debug(5, "Room %d: '%s'", room, buf);
                  }
                  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 && _platform == Common::kPlatformFMTowns))
                        error("Bad ID %c%c found in directory!", blocktype & 0xFF, blocktype >> 8);
                  return;
            }
      }
      closeRoom();
}

void ScummEngine_v4::loadCharset(int no) {
      uint32 size;
      memset(_charsetData, 0, sizeof(_charsetData));

      checkRange(4, 0, no, "Loading illegal charset %d");
      closeRoom();

      Common::File file;
      char buf[20];

      sprintf(buf, "%03d.LFL", 900 + no);
      file.open(buf);

      if (file.isOpen() == false) {
            error("loadCharset(%d): Missing file charset: %s", no, buf);
      }

      size = file.readUint32LE() + 11;
      file.read(res.createResource(rtCharset, no, size), size);
}

void ScummEngine_v4::readMAXS(int blockSize) {
      // 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
}

void ScummEngine_v4::readGlobalObjects() {
      int i;
      int num = _fileHandle->readUint16LE();
      assert(num == _numGlobalObjects);

      uint32 bits;
      byte tmp;
      for (i = 0; i != num; i++) {
            bits = _fileHandle->readByte();
            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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