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font.h

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2004-2005 The ScummVM project
 *
 * The ReInherit Engine is (C)2000-2003 by Daniel Balsom.
 *
 * 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/saga/font.h,v 1.18.2.1 2005/10/18 02:11:20 sev Exp $
 *
 */

// Font management and font drawing header file

#ifndef SAGA_FONT_H__
#define SAGA_FONT_H__

#include "saga/list.h"
#include "saga/gfx.h"

namespace Saga {

#define FONT_SHOWUNDEFINED 1  // Define to draw undefined characters * as ?'s

// The first defined character (!) is the only one that may
// have a valid offset of '0'
#define FONT_FIRSTCHAR 33

#define FONT_CH_SPACE 32
#define FONT_CH_QMARK 63

// Minimum font header size without font data
// (6 + 512 + 256 + 256 + 256 )
#define FONT_DESCSIZE 1286

#define FONT_CHARCOUNT 256
#define FONT_CHARMASK 0xFFU

#define SAGA_FONT_HEADER_LEN 6

#define TEXT_CENTERLIMIT 50
#define TEXT_MARGIN 10
#define TEXT_LINESPACING 2

struct TextListEntry {
      bool display;
      bool useRect;
      Common::Point point;
      Common::Rect rect;
      int color;
      int effectColor;
      FontEffectFlags flags;
      FontId fontId;
      const char *text;
      TextListEntry() {
            memset(this, 0, sizeof(*this));
      }
};

class TextList: public SortedList<TextListEntry> {
public:

      TextListEntry *addEntry(const TextListEntry &entry) {
            return pushBack(entry).operator->();
      }
};

struct FontHeader {
      int charHeight;
      int charWidth;
      int rowLength;
};

struct FontCharEntry {
      int index;
      int byteWidth;
      int width;
      int flag;
      int tracking;
};

struct FontStyle {
      FontHeader header;
      FontCharEntry fontCharEntry[256];
      byte *font;
};

struct FontData {
      FontStyle normal;
      FontStyle outline;
};

class Font {
 public:
      Font(SagaEngine *vm);
      ~Font(void);
      FontData *getFont(FontId fontId);
      int getStringWidth(FontId fontId, const char *text, size_t count, FontEffectFlags flags);
      int getHeight(FontId fontId);
      int getHeight(FontId fontId, const char *text, int width, FontEffectFlags flags);

      void textDraw(FontId fontId, Surface *ds, const char *string, const Common::Point &point, int color, int effectColor, FontEffectFlags flags);
      void textDrawRect(FontId fontId, Surface *ds, const char *text, const Common::Rect &rect, int color, int effectColor, FontEffectFlags flags);

      void validate(FontId fontId) {
            if ((fontId < 0) || (fontId >= _loadedFonts)) {
                  error("Font::validate: Invalid font id.");
            }
      }

      bool loaded(FontId fontId) {
            return !((fontId < 0) || (fontId >= _loadedFonts));
      }

 private:
      void loadFont(uint32 fontResourceId);
      void createOutline(FontData *font);
      void draw(FontId fontId, Surface *ds, const char *text, size_t count, const Common::Point &point, int color, int effectColor, FontEffectFlags flags);
      void outFont(const FontStyle &drawFont, Surface *ds, const char *text, size_t count, const Common::Point &point, int color, FontEffectFlags flags);
      int getByteLen(int numBits) const {
            int byteLength = numBits / 8;

            if (numBits % 8) {
                  byteLength++;
            }

            return byteLength;
      }

      static const int _charMap[256];
      SagaEngine *_vm;

      bool _initialized;

      int _loadedFonts;
      FontData **_fonts;
};

} // End of namespace Saga

#endif

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