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/*
Copyright (C) 2014 Paul Davis, Robin Gareus
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __libgtkmm2ext_emscale_h__
#define __libgtkmm2ext_emscale_h__
#include <map>
#include <string>
#include <pangomm/fontdescription.h>
#include "gtkmm2ext/visibility.h"
namespace Gtkmm2ext
{
class LIBGTKMM2EXT_API EmScale
{
public:
EmScale (const Pango::FontDescription&);
unsigned int char_pixel_width() { if (_char_pixel_width < 1) recalc_char_pixel_geometry() ; return _char_pixel_width; }
unsigned int char_pixel_height() { if (_char_pixel_height < 1) recalc_char_pixel_geometry() ; return _char_pixel_height; }
float char_avg_pixel_width() { if (_char_pixel_width < 1) recalc_char_pixel_geometry() ; return _char_avg_pixel_width; }
static EmScale& by_font (const Pango::FontDescription&);
private:
Pango::FontDescription _font;
unsigned int _char_pixel_width;
unsigned int _char_pixel_height;
float _char_avg_pixel_width;
void recalc_char_pixel_geometry ();
static std::map<std::string,EmScale> _emscales;
};
} // namespace
#endif /* __libgtkmm2ext_emscale_h__ */
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