src/Canvas/canvas_mgr.cxx

   1 // Canvas with 2D rendering api
   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 "canvas_mgr.hxx"
  20 #include "canvas.hxx"
  21
  22 #include <Main/fg_props.hxx>
  23
  24 #include <osg/Camera>
  25 #include <osg/Texture2D>
  26
  27 #include <stdexcept>
  28 #include <string>
  29
  30 //------------------------------------------------------------------------------
  31 CanvasMgr::CanvasMgr():
  32   _props( fgGetNode("/canvas", true) )
  33 {
  34
  35 }
  36
  37 //------------------------------------------------------------------------------
  38 CanvasMgr::~CanvasMgr()
  39 {
  40
  41 }
  42
  43 //------------------------------------------------------------------------------
  44 void CanvasMgr::init()
  45 {
  46   _props->addChangeListener(this);
  47   triggerChangeRecursive(_props);
  48 }
  49
  50 //------------------------------------------------------------------------------
  51 void CanvasMgr::reinit()
  52 {
  53
  54 }
  55
  56 //------------------------------------------------------------------------------
  57 void CanvasMgr::shutdown()
  58 {
  59   _props->removeChangeListener(this);
  60 }
  61
  62 //------------------------------------------------------------------------------
  63 void CanvasMgr::bind()
  64 {
  65 }
  66
  67 //------------------------------------------------------------------------------
  68 void CanvasMgr::unbind()
  69 {
  70 }
  71
  72 //------------------------------------------------------------------------------
  73 void CanvasMgr::update(double delta_time_sec)
  74 {
  75  for( size_t i = 0; i < _canvases.size(); ++i )
  76    if( _canvases[i] )
  77      _canvases[i]->update(delta_time_sec);
  78 }
  79
  80 //------------------------------------------------------------------------------
  81 void CanvasMgr::childAdded( SGPropertyNode * parent,
  82                             SGPropertyNode * child )
  83 {
  84   if( parent != _props )
  85     return;
  86
  87   if( child->getNameString() == "texture" )
  88     textureAdded(child);
  89 }
  90
  91 //------------------------------------------------------------------------------
  92 void CanvasMgr::childRemoved( SGPropertyNode * parent,
  93                               SGPropertyNode * child )
  94 {
  95   if( parent != _props )
  96     return;
  97
  98   if( child->getNameString() == "texture" )
  99   {
 100     size_t index = child->getIndex();
 101
 102     if( index >= _canvases.size() )
 103       SG_LOG(SG_GL, SG_WARN, "can't removed unknown texture[" << index << "]!");
 104     else
 105       // remove the canvas...
 106       _canvases[index].reset();
 107   }
 108 }
 109
 110 //------------------------------------------------------------------------------
 111 void CanvasMgr::textureAdded(SGPropertyNode* node)
 112 {
 113   size_t index = node->getIndex();
 114
 115   if( index >= _canvases.size() )
 116   {
 117     if( index > _canvases.size() )
 118       SG_LOG(SG_GL, SG_WARN, "Skipping unused texture slot(s)!");
 119
 120     _canvases.resize(index + 1);
 121   }
 122   else
 123   {
 124     SG_LOG(SG_GL, SG_WARN, "texture[" << index << "] already exists!");
 125   }
 126
 127   _canvases[index].reset( new Canvas() );
 128   _canvases[index]->reset(node);
 129 }
 130
 131 //------------------------------------------------------------------------------
 132 void CanvasMgr::triggerChangeRecursive(SGPropertyNode* node)
 133 {
 134   node->getParent()->fireChildAdded(node);
 135
 136   if( node->nChildren() == 0 && node->getType() != simgear::props::NONE )
 137     return node->fireValueChanged();
 138
 139   for( int i = 0; i < node->nChildren(); ++i )
 140     triggerChangeRecursive( node->getChild(i) );
 141 }