src/Canvas/FGCanvasSystemAdapter.cxx

   1 // Integrate Canvas into FlightGear
   2 //
   3 // Copyright (C) 2012  Thomas Geymayer <tomgey@gmail.com>
   4 //
   5 // This program is free software; you can redistribute it and/or
   6 // modify it under the terms of the GNU General Public License as
   7 // published by the Free Software Foundation; either version 2 of the
   8 // License, or (at your option) any later version.
   9 //
  10 // This program is distributed in the hope that it will be useful, but
  11 // WITHOUT ANY WARRANTY; without even the implied warranty of
  12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13 // General Public License for more details.
  14 //
  15 // You should have received a copy of the GNU General Public License
  16 // along with this program; if not, write to the Free Software
  17 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  18
  19 #include "FGCanvasSystemAdapter.hxx"
  20
  21 #include <Main/globals.hxx>
  22 #include <Main/util.hxx>
  23 #include <Network/HTTPClient.hxx>
  24 #include <Viewer/renderer.hxx>
  25
  26 #include <osgDB/ReadFile>
  27 #include <stdexcept>
  28
  29 namespace canvas
  30 {
  31   //----------------------------------------------------------------------------
  32   simgear::canvas::FontPtr
  33   FGCanvasSystemAdapter::getFont(const std::string& name) const
  34   {
  35     SGPath path = globals->resolve_resource_path("Fonts/" + name);
  36     if( path.isNull() )
  37     {
  38       SG_LOG
  39       (
  40         SG_GL,
  41         SG_ALERT,
  42         "canvas::Text: No such font: " << name
  43       );
  44       return simgear::canvas::FontPtr();
  45     }
  46
  47     SG_LOG
  48     (
  49       SG_GL,
  50       SG_INFO,
  51       "canvas::Text: using font file " << path
  52     );
  53
  54     simgear::canvas::FontPtr font = osgText::readFontFile(path.local8BitStr());
  55     if( !font )
  56       SG_LOG
  57       (
  58         SG_GL,
  59         SG_ALERT,
  60         "canvas::Text: Failed to open font file " << path
  61       );
  62
  63     return font;
  64   }
  65
  66   //----------------------------------------------------------------------------
  67   void FGCanvasSystemAdapter::addCamera(osg::Camera* camera) const
  68   {
  69     globals->get_renderer()->addCamera(camera, false);
  70   }
  71
  72   //----------------------------------------------------------------------------
  73   void FGCanvasSystemAdapter::removeCamera(osg::Camera* camera) const
  74   {
  75     if( globals->get_renderer() )
  76       globals->get_renderer()->removeCamera(camera);
  77   }
  78
  79   //----------------------------------------------------------------------------
  80   osg::ref_ptr<osg::Image> FGCanvasSystemAdapter::getImage(const std::string& path) const
  81   {
  82       SGPath p(SGPath::fromUtf8(path));
  83     if( p.isAbsolute() )
  84     {
  85       SGPath valid_path = fgValidatePath(p, false);
  86       if( !valid_path.isNull() )
  87         return osgDB::readImageFile(valid_path.local8BitStr());
  88
  89       SG_LOG(SG_IO, SG_ALERT, "canvas::Image: reading '" << path << "' denied");
  90     }
  91     else
  92     {
  93       SGPath tpath = globals->resolve_resource_path(path);
  94       if( !tpath.isNull() )
  95         return osgDB::readRefImageFile(tpath.local8BitStr());
  96
  97       SG_LOG(SG_IO, SG_ALERT, "canvas::Image: No such image: '" << path << "'");
  98     }
  99
 100     return 0;
 101   }
 102
 103   //----------------------------------------------------------------------------
 104   SGSubsystem*
 105   FGCanvasSystemAdapter::getSubsystem(const std::string& name) const
 106   {
 107     return globals->get_subsystem(name.c_str());
 108   }
 109
 110   //----------------------------------------------------------------------------
 111   simgear::HTTP::Client* FGCanvasSystemAdapter::getHTTPClient() const
 112   {
 113     FGHTTPClient* http = globals->get_subsystem<FGHTTPClient>();
 114
 115     if( http )
 116       return http->client();
 117
 118     SG_LOG( SG_IO,
 119             SG_ALERT,
 120             "FGCanvasSystemAdapter: Failed to get HTTP subsystem" );
 121     return 0;
 122   }
 123
 124 }