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charset.h

/* ScummVM - Scumm Interpreter
 * 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/charset.h,v 2.32 2004/10/23 23:08:51 fingolfin Exp $
 */

#ifndef CHARSET_H
#define CHARSET_H

#include "common/scummsys.h"
#include "common/rect.h"
#include "scumm/gfx.h"

namespace Scumm {

class ScummEngine;
class NutRenderer;
struct VirtScreen;

static inline bool checkKSCode(byte hi, byte lo) {
      //hi : xx
      //lo : yy
      if ((0xA1 > lo) || (0xFE < lo)) {
            return false;
      }
      if ((hi >= 0xB0) && (hi <= 0xC8)) {
            return true;
      }
      return false;
}

static inline bool checkSJISCode(byte c) {
      if ((c > 0x84 && c < 0x88) || (c > 0x9f && c < 0xe0) || (c > 0xea /* && c <= 0xff */))
            return false;
      return true;
}


class CharsetRenderer {
public:
      
      Common::Rect _str;
      int _nextLeft, _nextTop;

      int _top;
      int _left, _startLeft;
      int _right;

protected:
      byte _color;
      byte _shadowColor;
      bool _dropShadow;

public:
      bool _center;

      bool _hasMask;    // True if "removable" text is visible somewhere (should be called _hasText or so)
      VirtScreenNumber _textScreenID;     // ID of the virtual screen on which the text is visible.

      bool _ignoreCharsetMask;
      bool _blitAlso;
      bool _firstChar;
      bool _disableOffsX;

protected:
      ScummEngine *_vm;
      byte _curId;

public:
      CharsetRenderer(ScummEngine *vm);
      virtual ~CharsetRenderer() {}

      void restoreCharsetBg();
      void clearCharsetMask();

      virtual void printChar(int chr) = 0;
      virtual void drawChar(int chr, const Graphics::Surface &s, int x, int y) {}

      int getStringWidth(int a, const byte *str);
      void addLinebreaks(int a, byte *str, int pos, int maxwidth);
      
      virtual void setCurID(byte id) = 0;
      int getCurID() { return _curId; }
      
      virtual int getFontHeight() = 0;
      virtual int getCharWidth(byte chr) = 0;
      
      virtual void setColor(byte color) { _color = color; }
};

class CharsetRendererCommon : public CharsetRenderer {
protected:
      byte *_fontPtr;

      void drawBits1(const Graphics::Surface &s, byte *dst, const byte *src, int drawTop, int width, int height);

public:
      CharsetRendererCommon(ScummEngine *vm) : CharsetRenderer(vm) {}

      void setCurID(byte id);
      
      int getFontHeight();
};

class CharsetRendererClassic : public CharsetRendererCommon {
protected:
      void drawBitsN(const Graphics::Surface &s, byte *dst, const byte *src, byte bpp, int drawTop, int width, int height);

public:
      CharsetRendererClassic(ScummEngine *vm) : CharsetRendererCommon(vm) {}
      
      void printChar(int chr);
      void drawChar(int chr, const Graphics::Surface &s, int x, int y);

      int getCharWidth(byte chr);
};

class CharsetRendererV3 : public CharsetRendererCommon {
protected:
      int _numChars;
      byte *_widthTable;

public:
      CharsetRendererV3(ScummEngine *vm) : CharsetRendererCommon(vm) {}
      
      void printChar(int chr);
      void drawChar(int chr, const Graphics::Surface &s, int x, int y);
      void setCurID(byte id);
      void setColor(byte color);
      int getFontHeight();
      int getCharWidth(byte chr);
};

class CharsetRendererV2 : public CharsetRendererV3 {
public:
      CharsetRendererV2(ScummEngine *vm, Common::Language language);
      
      void setCurID(byte id) {}
      int getCharWidth(byte chr) { return 8; }
};

class CharsetRendererNut : public CharsetRenderer {
protected:
      NutRenderer *_fr[5];
      NutRenderer *_current;

public:
      CharsetRendererNut(ScummEngine *vm);
      ~CharsetRendererNut();
      
      void printChar(int chr);

      void setCurID(byte id);
      
      int getFontHeight();
      int getCharWidth(byte chr);
};

} // End of namespace Scumm


#endif

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