bitmap_font.hpp

video linux conference

/*****************************************************************************
 * bitmap_font.hpp
 *****************************************************************************
 * Copyright (C) 2004 VideoLAN
 * $Id: bitmap_font.hpp 7174 2004-03-27 11:24:24Z asmax $
 *
 * Authors: Cyril Deguet     <[e-mail]>
 *
 * 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, USA.
 *****************************************************************************/

#ifndef BITMAP_FONT_HPP
#define BITMAP_FONT_HPP

#include "generic_font.hpp"
#include <string>

class GenericBitmap;


/// Class to handle bitmap fonts
class BitmapFont: public GenericFont
{
    public:
        BitmapFont( intf_thread_t *pIntf, const GenericBitmap &rBitmap,
                    const string &rType );
        virtual ~BitmapFont() {}

        virtual bool init() { return true; }

        /// Render a string on a bitmap.
        /// If maxWidth != -1, the text is truncated with '...'
        virtual GenericBitmap *drawString( const UString &rString,
            uint32_t color, int maxWidth = -1 ) const;

        /// Get the font size
        virtual int getSize() const { return 12; }

    private:
        /// Description of a glyph
        struct Glyph_t
        {
            Glyph_t(): m_xPos( -1 ), m_yPos( 0 ) {}
            int m_xPos, m_yPos;
        };

        /// Bitmap
        const GenericBitmap &m_rBitmap;
        /// Glyph size
        int m_width, m_height;
        /// Horizontal advance between two characters
        int m_advance;
        /// Horizontal advance for non-displayable characters
        int m_skip;
        /// Character table
        Glyph_t m_table[256];
};

#endif