src/Canvas/FGCanvasSystemAdapter.cxx

   1 #include "FGCanvasSystemAdapter.hxx"
   2
   3 #include <Main/globals.hxx>
   4 #include <Scripting/NasalSys.hxx>
   5 #include <Viewer/renderer.hxx>
   6
   7 #include <osgDB/ReadFile>
   8 #include <stdexcept>
   9
  10 namespace canvas
  11 {
  12   //----------------------------------------------------------------------------
  13   simgear::canvas::FontPtr
  14   FGCanvasSystemAdapter::getFont(const std::string& name) const
  15   {
  16     SGPath path = globals->resolve_resource_path("Fonts/" + name);
  17     if( path.isNull() )
  18     {
  19       SG_LOG
  20       (
  21         SG_GL,
  22         SG_ALERT,
  23         "canvas::Text: No such font: " << name
  24       );
  25       return simgear::canvas::FontPtr();
  26     }
  27
  28     SG_LOG
  29     (
  30       SG_GL,
  31       SG_INFO,
  32       "canvas::Text: using font file " << path.str()
  33     );
  34
  35     simgear::canvas::FontPtr font = osgText::readFontFile(path.c_str());
  36     if( !font )
  37       SG_LOG
  38       (
  39         SG_GL,
  40         SG_ALERT,
  41         "canvas::Text: Failed to open font file " << path.c_str()
  42       );
  43
  44     return font;
  45   }
  46
  47   //----------------------------------------------------------------------------
  48   void FGCanvasSystemAdapter::addCamera(osg::Camera* camera) const
  49   {
  50     globals->get_renderer()->addCamera(camera, false);
  51   }
  52
  53   //----------------------------------------------------------------------------
  54   void FGCanvasSystemAdapter::removeCamera(osg::Camera* camera) const
  55   {
  56     globals->get_renderer()->removeCamera(camera);
  57   }
  58
  59   //----------------------------------------------------------------------------
  60   osg::Image* FGCanvasSystemAdapter::getImage(const std::string& path) const
  61   {
  62     SGPath tpath = globals->resolve_resource_path(path);
  63     if( tpath.isNull() || !tpath.exists() )
  64     {
  65       SG_LOG(SG_GL, SG_ALERT, "canvas::Image: No such image: " << path);
  66       return 0;
  67     }
  68
  69     return osgDB::readImageFile(tpath.c_str());
  70   }
  71
  72   /**
  73    * Get current FGNasalSys instance.
  74    */
  75   static FGNasalSys* getNasalSys()
  76   {
  77     static FGNasalSys* nasal_sys = 0;
  78     // TODO if Nasal is able to be removed and/or recreated at runtime we need
  79     //      to ensure that always the current instance is used
  80     if( !nasal_sys )
  81     {
  82       nasal_sys = dynamic_cast<FGNasalSys*>(globals->get_subsystem("nasal"));
  83       if( !nasal_sys )
  84         throw std::runtime_error("FGCanvasSystemAdapter: no NasalSys");
  85     }
  86
  87     return nasal_sys;
  88   }
  89
  90   //----------------------------------------------------------------------------
  91   naContext FGCanvasSystemAdapter::getNasalContext() const
  92   {
  93     return getNasalSys()->context();
  94   }
  95
  96   //----------------------------------------------------------------------------
  97   int FGCanvasSystemAdapter::gcSave(naRef r)
  98   {
  99     return getNasalSys()->gcSave(r);
 100   }
 101
 102   //----------------------------------------------------------------------------
 103   void FGCanvasSystemAdapter::gcRelease(int key)
 104   {
 105     getNasalSys()->gcRelease(key);
 106   }
 107
 108   //------------------------------------------------------------------------------
 109   naRef FGCanvasSystemAdapter::callMethod( naRef code,
 110                                            naRef self,
 111                                            int argc,
 112                                            naRef* args,
 113                                            naRef locals )
 114   {
 115     return getNasalSys()->callMethod(code, self, argc, args, locals);
 116   }
 117
 118 }