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font_data.h

00001 /* 00002 libwftk - Worldforge Toolkit - a widget library 00003 Copyright (C) 2003 Ron Steinke <rsteinke@w-link.net> 00004 00005 This library is free software; you can redistribute it and/or 00006 modify it under the terms of the GNU Lesser General Public 00007 License as published by the Free Software Foundation; either 00008 version 2.1 of the License, or (at your option) any later version. 00009 00010 This library is distributed in the hope that it will be useful, 00011 but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00013 Lesser General Public License for more details. 00014 00015 You should have received a copy of the GNU Lesser General Public 00016 License along with this library; if not, write to the 00017 Free Software Foundation, Inc., 59 Temple Place - Suite 330, 00018 Boston, MA 02111-1307, SA. 00019 */ 00020 00021 #ifndef _FONT_DATA_H 00022 #define _FONT_DATA_H 00023 00024 #include <wftk/font.h> 00025 00026 #include <ft2build.h> 00027 #include FT_FREETYPE_H 00028 00029 namespace wftk { 00030 00031 // a wrapper around a freetype2 font face 00032 class FontData 00033 { 00034 public: 00035 FontData(const std::string& file, unsigned ptsize, unsigned face_index = 0) 00036 throw(Font::BadFont); 00037 FontData(const unsigned char* buffer, unsigned buf_size, unsigned ptsize, 00038 unsigned face_index = 0) throw(Font::BadFont); 00039 ~FontData(); 00040 00041 // glyph access 00042 FT_GlyphSlot operator[](unsigned char); 00043 00044 const Font::Metrics& metrics() const {return metrics_;} 00045 00046 Font::SurfaceTable* ref(const Color& color) {return map_.ref(color);} 00047 void unref(const Color& color) {map_.unref(color);} 00048 bool empty() const {return map_.empty();} 00049 00050 bool hasKerning() const {return FT_HAS_KERNING(face_);} 00051 Point getKerning(unsigned char prev, unsigned char next) const; 00052 00053 private: 00054 // unimplemented 00055 FontData(const FontData&); 00056 FontData& operator=(const FontData&); 00057 00058 static FT_Library lib_; 00059 static unsigned long lib_refcount_; 00060 00061 static void reflib() throw(Font::BadFont); 00062 static void unreflib() throw(); 00063 00064 // return horizontal and vertical dots per inch, 00065 // FIXME this is currently just the value for a 17" 00066 // monitor and 1024x768, need some way to auto-detect 00067 // this 00068 static Point getDPI() {return Point(80, 80);} 00069 00070 FT_Face face_; 00071 00072 Font::Metrics metrics_; 00073 00074 void setMetrics(); 00075 00076 Font::MapType map_; 00077 }; 00078 00079 } // namespace 00080 00081 #endif

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