101 lines
3 KiB
C++
101 lines
3 KiB
C++
// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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#ifndef __FGFONTCACHE_HXX
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#define __FGFONTCACHE_HXX
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#include <simgear/misc/sg_path.hxx>
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#include <map>
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#include <algorithm>
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// forward decls
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class SGPropertyNode;
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class puFont;
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class fntTexFont;
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/**
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* A class to keep all fonts available for future use.
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* This also assures a font isn't resident more than once.
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*/
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class FGFontCache {
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private:
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FGFontCache(); // private constructor, use singleton instance() accessor
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// The parameters of a request to the cache.
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struct FntParams
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{
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const std::string name;
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const float size;
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const float slant;
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FntParams() : size(0.0f), slant(0.0f) {}
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FntParams(const FntParams& rhs)
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: name(rhs.name), size(rhs.size), slant(rhs.slant)
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{
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}
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FntParams(const std::string& name_, float size_, float slant_)
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: name(name_), size(size_), slant(slant_)
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{
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}
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bool operator<(const FntParams& other) const;
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};
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struct FontCacheEntry {
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FontCacheEntry(puFont* pu = 0) : pufont(pu), texfont(0) {}
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~FontCacheEntry();
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// Font used by plib GUI code
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puFont *pufont;
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// TXF font
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fntTexFont *texfont;
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bool ownsPUFont = false;
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};
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// Path to the font directory
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SGPath _path;
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typedef std::map<const std::string, fntTexFont*> TexFontMap;
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typedef std::map<const FntParams, FontCacheEntry*> PuFontMap;
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TexFontMap _texFonts;
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PuFontMap _cache;
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bool _initialized;
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FontCacheEntry* getfnt(const std::string& name, float size, float slant);
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void init();
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public:
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// note this accesor is NOT thread-safe
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static FGFontCache* instance();
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static void shutdown();
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~FGFontCache();
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puFont *get(const std::string& name, float size=15.0, float slant=0.0);
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puFont *get(SGPropertyNode *node);
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fntTexFont *getTexFont(const std::string& name, float size=15.0, float slant=0.0);
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SGPath getfntpath(const std::string& name);
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/**
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* Preload all the fonts in the FlightGear font directory. It is
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* important to load the font textures early, with the proper
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* graphics context current, so that no plib (or our own) code
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* tries to load a font from disk when there's no current graphics
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* context.
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*/
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bool initializeFonts();
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};
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#endif
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