#include <simgear/structure/subsystem_mgr.hxx>
#include <simgear/misc/sg_path.hxx>
+#include <functional>
#include <vector>
#include <map>
/**
- * A small class to keep all fonts available for future use.
+ * A class to keep all fonts available for future use.
* This also assures a font isn't resident more than once.
*/
class FGFontCache {
private:
+ // The parameters of a request to the cache.
+ struct FntParams
+ {
+ const std::string name;
+ const float size;
+ const float slant;
+ FntParams() : size(0.0f), slant(0.0f) {}
+ FntParams(const FntParams& rhs)
+ : name(rhs.name), size(rhs.size), slant(rhs.slant)
+ {
+ }
+ FntParams(const std::string& name_, float size_, float slant_)
+ : name(name_), size(size_), slant(slant_)
+ {
+ }
+ };
+ struct FntParamsLess
+ : public std::binary_function<const FntParams, const FntParams, bool>
+ {
+ bool operator() (const FntParams& f1, const FntParams& f2) const;
+ };
struct fnt {
fnt(puFont *pu = 0) : pufont(pu), texfont(0) {}
~fnt() { if (texfont) { delete pufont; delete texfont; } }
+ // Font used by plib GUI code
puFont *pufont;
+ // TXF font
fntTexFont *texfont;
};
+ // Path to the font directory
SGPath _path;
- map<const string,fnt *> _fonts;
- typedef map<const string,fnt *>::const_iterator _itt_t;
+ typedef map<const string, fntTexFont*> TexFontMap;
+ typedef map<const FntParams, fnt*, FntParamsLess> PuFontMap;
+ TexFontMap _texFonts;
+ PuFontMap _puFonts;
+
bool _initialized;
struct fnt *getfnt(const char *name, float size, float slant);
+ void init();
public:
FGFontCache();
fntTexFont *getTexFont(const char *name, float size=15.0, float slant=0.0);
SGPath getfntpath(const char *name);
+ /**
+ * Preload all the fonts in the FlightGear font directory. It is
+ * important to load the font textures early, with the proper
+ * graphics context current, so that no plib (or our own) code
+ * tries to load a font from disk when there's no current graphics
+ * context.
+ */
+ bool initializeFonts();
};