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font.h

/* ScummVM - Scumm Interpreter
 * Copyright (C) 2004-2006 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.
 *
 * $URL: https://svn.sourceforge.net/svnroot/scummvm/scummvm/tags/release-0-9-1/engines/saga/font.h $
 * $Id: font.h 20532 2006-02-11 12:44:16Z fingolfin $
 *
 */

// 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

enum FontEffectFlags {
      kFontNormal   = 0,
      kFontOutline  = 1 << 0,
      kFontShadow   = 1 << 1,
      kFontBold     = 1 << 2,
      kFontCentered = 1 << 3,
      kFontDontmap  = 1 << 4
};

enum KnownFont {
      kKnownFontSmall,
      kKnownFontMedium,
      kKnownFontBig,

      kKnownFontPause,
      kKnownFontScript,
      kKnownFontVerb
};

struct TextListEntry {
      bool display;
      bool useRect;
      Common::Point point;
      Common::Rect rect;
      KnownColor knownColor;
      KnownColor effectKnownColor;
      FontEffectFlags flags;
      KnownFont font;
      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);
      int getStringWidth(KnownFont font, const char *text, size_t count, FontEffectFlags flags) {
            return getStringWidth(knownFont2FontIdx(font), text, count, flags);
      }
      int getHeight(KnownFont font) {
            return getHeight(knownFont2FontIdx(font));
      }
      int getHeight(KnownFont font, const char *text, int width, FontEffectFlags flags) {
            return getHeight(knownFont2FontIdx(font), text, width, flags);
      }
      void textDraw(KnownFont font, Surface *ds, const char *string, const Common::Point &point, int color, int effectColor, FontEffectFlags flags) {
            textDraw(knownFont2FontIdx(font), ds, string, point, color, effectColor, flags);
      }
      void textDrawRect(KnownFont font, Surface *ds, const char *text, const Common::Rect &rect, int color, int effectColor, FontEffectFlags flags) {
            textDrawRect(knownFont2FontIdx(font), ds, text, rect, color, effectColor, flags);
      }
      
 private:
       enum FontId {
             kSmallFont,
             kMediumFont,
             kBigFont,
             kIHNMUnknown,
             kIHNMFont8,
             kIHNMUnknown2,
             kIHNMMainFont
       };

       Font::FontId knownFont2FontIdx(KnownFont font);

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

       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);
       
       FontData *getFont(FontId fontId) {
             validate(fontId);
             return _fonts[fontId];
       }

      int getHeight(FontId fontId) {
             return getFont(fontId)->normal.header.charHeight;
       }

       void validate(FontId fontId) {
             if (!valid(fontId)) {
                   error("Font::validate: Invalid font id.");
             }
       }
       bool valid(FontId fontId) {
             return ((fontId >= 0) && (fontId < _loadedFonts));
       }
       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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