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global.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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.
 *
 * $URL: https://scummvm.svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-0-11-1/engines/gob/global.h $
 * $Id: global.h 30944 2008-02-23 22:50:18Z sev $
 *
 */

#ifndef GOB_GLOBAL_H
#define GOB_GLOBAL_H

#include "common/file.h"
#include "common/endian.h"

#include "gob/video.h"

namespace Gob {

#define VIDMODE_CGA     0x05
#define VIDMODE_EGA     0x0D
#define VIDMODE_VGA     0x13
#define VIDMODE_HER     7

#define PROAUDIO_FLAG   0x10
#define ADLIB_FLAG            0x08
#define BLASTER_FLAG    0x04
#define INTERSOUND_FLAG 0x02
#define SPEAKER_FLAG    0x01
#define MIDI_FLAG       0x4000

#define NO  0
#define YES 1
#define UNDEF     2

#define F1_KEY    0x3B00
#define F2_KEY    0x3C00
#define F3_KEY    0x3D00
#define F4_KEY    0x3E00
#define F5_KEY    0x3F00
#define F6_KEY    0x4000
#define ESCAPE    0x001B
#define ENTER     0x000D

/* Video drivers */
#define UNK_DRIVER      0
#define VGA_DRIVER      1
#define EGA_DRIVER      2
#define CGA_DRIVER      3
#define HER_DRIVER      4

class Global {
public:
      char _pressedKeys[128];

      int16 _presentCGA;
      int16 _presentEGA;
      int16 _presentVGA;
      int16 _presentHER;

      int16 _videoMode;
      int16 _fakeVideoMode;
      int16 _oldMode;

      int16 _frameWaitTime;
      int32 _startFrameTime;

      uint16 _soundFlags;

      uint16 _language;
      uint16 _languageWanted;

      char _useMouse;
      int16 _mousePresent;
      int16 _mouseXShift;
      int16 _mouseYShift;
      int16 _mouseMaxCol;
      int16 _mouseMaxRow;

      char _useJoystick;

      int16 _primaryWidth;
      int16 _primaryHeight;

      int16 _colorCount;
      char _redPalette[256];
      char _greenPalette[256];
      char _bluePalette[256];

      int16 _unusedPalette1[18];
      int16 _unusedPalette2[16];
      Video::Color _vgaPalette[16];
      Video::PalDesc _paletteStruct;
      Video::PalDesc *_pPaletteDesc;

      bool _setAllPalette;
      bool _dontSetPalette;

      SurfaceDesc::Ptr _primarySurfDesc;

      int16 _debugFlag;
      int16 _inVM;

      char _inter_resStr[200];
      int32 _inter_resVal;

      byte *_inter_variablesSizes; // 0: single byte, 1: two bytes, 3: four bytes
      byte *_inter_variables;
      byte *_inter_execPtr;
      int16 _inter_animDataSize;

      int16 _inter_mouseX;
      int16 _inter_mouseY;

      // Can be 1, 2 or 3 for normal, double and triple speed, respectively
      uint8 _speedFactor;

      void clearVars(uint32 count) {
            uint32 size = count * 4;

            memset(_inter_variables, 0, size);
            memset(_inter_variablesSizes, 0, size);
            for (uint32 i = 0; i < size; i += 4)
                  _inter_variablesSizes[i] = 3;
      }

      void writeVarSizeStr(uint32 offset, uint32 len) {
            uint32 i;
            uint32 inVar;
            uint32 varOff;

            inVar = offset % 4;
            varOff = (offset >> 2) << 2;
            for (i = 0; i < 4; i++) {
                  if (_inter_variablesSizes[varOff + i] == 3)
                        _inter_variablesSizes[varOff + i] = 0;
                  else if ((inVar == (i+1)) && (_inter_variablesSizes[varOff + i] == 1))
                        _inter_variablesSizes[varOff + i] = 0;
            }
            memset(_inter_variablesSizes + offset, 0, len);
      }

      void writeVar(uint32 offset, uint32 val) {
            WRITE_UINT32(_inter_variables + offset, val);
            writeVarSize(offset, 3);
      }
      void writeVar(uint32 offset, uint16 val) {
            WRITE_UINT16(_inter_variables + offset, val);
            writeVarSize(offset, 1);
      }
      void writeVar(uint32 offset, uint8 val) {
            (*(uint8 *)(_inter_variables + offset)) = val;
            writeVarSize(offset, 0);
      }
      void writeVar(uint32 offset, const char *str) {
            writeVarSizeStr(offset, strlen(str));
            strcpy((char *) (_inter_variables + offset), str);
      }

      Global(GobEngine *vm);
      ~Global();

protected:
      GobEngine *_vm;

      void writeVarSize(uint32 offset, byte n) {
            uint32 i;
            uint32 inVar;
            uint32 varOff;

            inVar = offset % 4;
            varOff = (offset >> 2) << 2;
            for (i = 0; i < 4; i++) {
                  if (_inter_variablesSizes[varOff + i] == 3)
                        _inter_variablesSizes[varOff + i] = 0;
                  else if ((inVar == (i+1)) && (_inter_variablesSizes[varOff + i] == 1))
                        _inter_variablesSizes[varOff + i] = 0;
            }

            _inter_variablesSizes[offset] = n;
            for (; n > 0; n--)
                  _inter_variablesSizes[offset + n] = 0;
      }

};

} // End of namespace Gob

#endif // GOB_GLOBAL_H

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