]> git.mxchange.org Git - flightgear.git/blob - src/Canvas/canvas_mgr.cxx
CanvasWidget: Retrieve texture id every frame.
[flightgear.git] / 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
21 #include <Canvas/FGCanvasSystemAdapter.hxx>
22 #include <Cockpit/od_gauge.hxx>
23 #include <Main/fg_props.hxx>
24 #include <Viewer/CameraGroup.hxx>
25
26 #include <simgear/canvas/Canvas.hxx>
27
28 //------------------------------------------------------------------------------
29 CanvasMgr::CanvasMgr():
30   simgear::canvas::CanvasMgr
31   (
32    fgGetNode("/canvas/by-index", true),
33    simgear::canvas::SystemAdapterPtr( new canvas::FGCanvasSystemAdapter )
34   )
35 {
36   using simgear::canvas::Canvas;
37   Canvas::addPlacementFactory
38   (
39     "object",
40     boost::bind
41     (
42       &FGODGauge::set_texture,
43       _1,
44       boost::bind(&Canvas::getTexture, _2),
45       boost::bind(&Canvas::getCullCallback, _2)
46     )
47   );
48 }
49
50 //------------------------------------------------------------------------------
51 unsigned int
52 CanvasMgr::getCanvasTexId(const simgear::canvas::CanvasPtr& canvas) const
53 {
54   osg::Texture2D* tex = canvas->getTexture();
55   if( !tex )
56     return 0;
57
58 //  osgViewer::Viewer::Contexts contexts;
59 //  globals->get_renderer()->getViewer()->getContexts(contexts);
60 //
61 //  if( contexts.empty() )
62 //    return 0;
63
64   static osg::Camera* guiCamera =
65     flightgear::getGUICamera(flightgear::CameraGroup::getDefault());
66
67   osg::State* state = guiCamera->getGraphicsContext()->getState(); //contexts[0]->getState();
68   if( !state )
69     return 0;
70
71   osg::Texture::TextureObject* tobj =
72     tex->getTextureObject( state->getContextID() );
73   if( !tobj )
74     return 0;
75
76   return tobj->_id;
77 }