/* 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 *
 * $Header$
 *
 */

// 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);
	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