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util.h

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2004 Ivan Dubrov
 * Copyright (C) 2004-2006 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.
 *
 * $URL: https://svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-0-9-1/engines/gob/util.h $
 * $Id: util.h 22410 2006-05-11 19:43:30Z drmccoy $
 *
 */
#ifndef GOB_UTIL_H
#define GOB_UTIL_H

#include "gob/video.h"
#include "gob/global.h"

namespace Gob {

#define KEYBUFSIZE 16

class Util {
public:
      struct ListNode;
      struct ListNode {
            void *pData;
            struct ListNode *pNext;
            struct ListNode *pPrev;
            ListNode() : pData(0), pNext(0), pPrev(0) {}
      };

      struct List {
            ListNode *pHead;
            ListNode *pTail;
            List() : pHead(0), pTail(0) {}
      };

      void initInput(void);
      void processInput(void);
      void waitKey(void);
      int16 getKey(void);
      int16 checkKey(void);
      int16 getRandom(int16 max);
      void getMouseState(int16 *pX, int16 *pY, int16 *pButtons);
      void setMousePos(int16 x, int16 y);
      void longDelay(uint16 msecs);
      void delay(uint16 msecs);
      void beep(int16 freq);
      uint32 getTimeKey(void);
      void waitMouseUp(void);
      void waitMouseDown(void);

      void keyboard_init(void);
      void keyboard_release(void);

      void clearPalette(void);

      void asm_setPaletteBlock(char *tmpPalBuffer, int16 start, int16 end);

      void vid_waitRetrace(int16 mode);

      Video::FontDesc *loadFont(const char *path);
      void freeFont(Video::FontDesc * fontDesc);
      static void insertStr(const char *str1, char *str2, int16 pos);
      static void cutFromStr(char *str, int16 from, int16 cutlen);
      void waitEndFrame();
      void setFrameRate(int16 rate);

      static void listInsertBack(List * list, void *data);
      static void listInsertFront(List * list, void *data);
      static void listDropFront(List * list);
      static void deleteList(List * list);
      static void prepareStr(char *str);
      void waitMouseRelease(char drawMouse);

      static const char trStr1[];
      static const char trStr2[];
      static const char trStr3[];

      inline uint8 readVariableByte(char *address) {
            int16 whichVar = address - _vm->_global->_inter_variables;
            int16 whichVarByte = whichVar % 4;

            whichVar >>= 2;
            return ((VAR(whichVar) >> 8 * (3-whichVarByte)) & 0xFF);
      }
      inline void writeVariableByte(char *address, uint8 value) {
            int16 whichVar = address - _vm->_global->_inter_variables;
            int16 whichVarByte = whichVar % 4;

            whichVar >>= 2;
            VAR(whichVar) &= ~(0xFF << 8 * (3-whichVarByte));
            VAR(whichVar) |= ((uint32) value) << 8 * (3-whichVarByte);
      }

      Util(GobEngine *vm);

protected:
      int16 _mouseX, _mouseY, _mouseButtons;
      int16 _keyBuffer[KEYBUFSIZE], _keyBufferHead, _keyBufferTail;
      GobEngine *_vm;

      void addKeyToBuffer(int16 key);
      bool keyBufferEmpty();
      bool getKeyFromBuffer(int16& key);
      int16 translateKey(int16 key);
      int16 calcDelayTime();
      void checkJoystick();
};

}                       // End of namespace Gob

#endif

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