0c4eaa8b29
Add defensive logic to ensure that a null pointer isn't dereferenced. This happened to me once or twice during a reinit (Location/Position In Air to the current position). It may be related to the model, but in any case the code needs to ensure that the static cast failure is handled correctly.
146 lines
4 KiB
C++
146 lines
4 KiB
C++
// Canvas with 2D rendering api
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//
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// Copyright (C) 2012 Thomas Geymayer <tomgey@gmail.com>
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#include "canvas_mgr.hxx"
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#include <Cockpit/od_gauge.hxx>
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#include <Main/fg_props.hxx>
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#include <Scripting/NasalModelData.hxx>
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#include <Viewer/CameraGroup.hxx>
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#include <simgear/canvas/Canvas.hxx>
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namespace sc = simgear::canvas;
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//------------------------------------------------------------------------------
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static sc::Placements addSceneObjectPlacement( SGPropertyNode* placement,
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sc::CanvasPtr canvas )
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{
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int module_id = placement->getIntValue("module-id", -1);
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if( module_id < 0 )
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return sc::Placements();
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FGNasalModelData* model_data =
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FGNasalModelData::getByModuleId( static_cast<unsigned int>(module_id) );
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if( !model_data )
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return sc::Placements();
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if( !model_data->getNode() )
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return sc::Placements();
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return FGODGauge::set_texture
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(
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model_data->getNode(),
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placement,
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canvas->getTexture(),
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canvas->getCullCallback(),
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canvas
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);
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}
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//------------------------------------------------------------------------------
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CanvasMgr::CanvasMgr():
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simgear::canvas::CanvasMgr( fgGetNode("/canvas/by-index", true) ),
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_cb_model_reinit
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(
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this,
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&CanvasMgr::handleModelReinit,
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fgGetNode("/sim/signals/model-reinit", true)
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)
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{
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}
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//----------------------------------------------------------------------------
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void CanvasMgr::init()
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{
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_gui_camera = flightgear::getGUICamera(flightgear::CameraGroup::getDefault());
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assert(_gui_camera.valid());
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sc::Canvas::addPlacementFactory
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(
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"object",
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boost::bind
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(
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&FGODGauge::set_aircraft_texture,
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_1,
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boost::bind(&sc::Canvas::getTexture, _2),
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boost::bind(&sc::Canvas::getCullCallback, _2),
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_2
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)
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);
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sc::Canvas::addPlacementFactory("scenery-object", &addSceneObjectPlacement);
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simgear::canvas::CanvasMgr::init();
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}
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//----------------------------------------------------------------------------
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void CanvasMgr::shutdown()
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{
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simgear::canvas::CanvasMgr::shutdown();
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sc::Canvas::removePlacementFactory("object");
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sc::Canvas::removePlacementFactory("scenery-object");
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_gui_camera = 0;
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}
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//------------------------------------------------------------------------------
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unsigned int
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CanvasMgr::getCanvasTexId(const simgear::canvas::CanvasPtr& canvas) const
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{
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if( !canvas )
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return 0;
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osg::Texture2D* tex = canvas->getTexture();
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if( !tex )
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return 0;
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// osgViewer::Viewer::Contexts contexts;
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// globals->get_renderer()->getViewer()->getContexts(contexts);
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//
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// if( contexts.empty() )
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// return 0;
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osg::ref_ptr<osg::Camera> guiCamera;
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if( !_gui_camera.lock(guiCamera) )
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return 0;
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osg::State* state = guiCamera->getGraphicsContext()->getState(); //contexts[0]->getState();
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if( !state )
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return 0;
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osg::Texture::TextureObject* tobj =
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tex->getTextureObject( state->getContextID() );
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if( !tobj )
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return 0;
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return tobj->_id;
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}
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//----------------------------------------------------------------------------
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void CanvasMgr::handleModelReinit(SGPropertyNode*)
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{
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for (size_t i = 0; i < _elements.size(); ++i)
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{
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sc::Canvas* element = static_cast<sc::Canvas*>(_elements[i].get());
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if (element)
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element->reloadPlacements("object");
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}
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}
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