bdf.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef GRAPHICS_FONTS_BDF_H
#define GRAPHICS_FONTS_BDF_H

#include "common/system.h"
#include "common/types.h"

#include "graphics/font.h"

namespace Common {
class SeekableReadStream;
}

namespace Graphics {

struct BdfBoundingBox {
    uint8 width, height;
    int8 xOffset, yOffset;
};

struct BdfFontData {
    const char *familyName;
    const char *slant;

    int maxAdvance;
    int height;
    int size;
    BdfBoundingBox defaultBox;
    int ascent;

    int firstCharacter;
    int defaultCharacter;
    int numCharacters;

    const byte *const *bitmaps;
    const byte *advances;
    const BdfBoundingBox *boxes;
};

class BdfFont : public Font {
public:
    BdfFont(const BdfFontData &data, DisposeAfterUse::Flag dispose);
    ~BdfFont();

    virtual int getFontHeight() const;
    virtual int getFontAscent() const;
    virtual int getMaxCharWidth() const;

    virtual int getCharWidth(uint32 chr) const;
    virtual void drawChar(Surface *dst, uint32 chr, int x, int y, uint32 color) const;

    const char *getFamilyName() const;
    const char *getFontSlant() const;
    int getFontSize() const;

    static BdfFont *loadFont(Common::SeekableReadStream &stream);
    static bool cacheFontData(const BdfFont &font, const Common::Path &filename);
    static BdfFont *loadFromCache(Common::SeekableReadStream &stream);
    static BdfFont *scaleFont(const BdfFont *src, int newSize);
private:
    int mapToIndex(uint32 ch) const;

    const BdfFontData _data;
    const DisposeAfterUse::Flag _dispose;
};

#define DEFINE_FONT(n) \
    const BdfFont *n = 0; \
    void create_##n() { \
        n = new BdfFont(desc, DisposeAfterUse::NO); \
    }

#define FORWARD_DECLARE_FONT(n) \
    extern const BdfFont *n; \
    extern void create_##n()

#define INIT_FONT(n) \
    create_##n()

} // End of namespace Graphics

#endif