dd996a3289
forcing users to use osgDB::readRef*File() methods. The later is preferable as it closes a potential threading bug when using paging databases in conjunction
with the osgDB::Registry Object Cache. This threading bug occurs when one thread gets an object from the Cache via an osgDB::read*File() call where only
a pointer to the object is passed back, so taking a reference to the object is delayed till it gets reassigned to a ref_ptr<>, but at the same time another
thread calls a flush of the Object Cache deleting this object as it's referenceCount is now zero. Using osgDB::readREf*File() makes sure the a ref_ptr<> is
passed back and the referenceCount never goes to zero.
To ensure the OSG builds when OSG_PROVIDE_READFILE is to OFF the many cases of osgDB::read*File() usage had to be replaced with a ref_ptr<> osgDB::readRef*File()
usage. The avoid this change causing lots of other client code to be rewritten to handle the use of ref_ptr<> in place of C pointer I introduced a serious of
templte methods in various class to adapt ref_ptr<> to the underly C pointer to be passed to old OSG API's, example of this is found in include/osg/Group:
bool addChild(Node* child); // old method which can only be used with a Node*
tempalte<class T> bool addChild(const osg::ref_ptr<T>& child) { return addChild(child.get()); } // adapter template method
These changes together cover 149 modified files, so it's a large submission. This extent of changes are warrent to make use of the Object Cache
and multi-threaded loaded more robust.
git-svn-id: http://svn.openscenegraph.org/osg/OpenSceneGraph/trunk@15164 16af8721-9629-0410-8352-f15c8da7e697
72 lines
2.3 KiB
C++
72 lines
2.3 KiB
C++
/* OpenSceneGraph example, osgterrain.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <osgViewer/Viewer>
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#include <osgViewer/ViewerEventHandlers>
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#include <osgDB/ReadFile>
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#include <osg/GraphicsCostEstimator>
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class CalibrateCostEsimator : public osg::GraphicsOperation
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{
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public:
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CalibrateCostEsimator(osg::GraphicsCostEstimator* gce):
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osg::Referenced(true),
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osg::GraphicsOperation("CalbirateCostEstimator",false),
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_gce(gce) {}
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virtual void operator () (osg::GraphicsContext* context)
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{
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osg::RenderInfo renderInfo(context->getState(), 0);
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_gce->calibrate(renderInfo);
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}
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osg::ref_ptr<osg::GraphicsCostEstimator> _gce;
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};
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int main(int argc, char** argv)
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{
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osg::ArgumentParser arguments(&argc, argv);
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// construct the viewer.
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osgViewer::Viewer viewer(arguments);
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osg::ref_ptr<osg::Node> node = osgDB::readRefNodeFiles(arguments);
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if (!node) return 0;
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osg::ref_ptr<osg::GraphicsCostEstimator> gce = new osg::GraphicsCostEstimator;
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viewer.setSceneData(node);
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viewer.realize();
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osg::CostPair compileCost = gce->estimateCompileCost(node.get());
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osg::CostPair drawCost = gce->estimateDrawCost(node.get());
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OSG_NOTICE<<"estimateCompileCost("<<node->getName()<<"), CPU="<<compileCost.first<<" GPU="<<compileCost.second<<std::endl;
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OSG_NOTICE<<"estimateDrawCost("<<node->getName()<<"), CPU="<<drawCost.first<<" GPU="<<drawCost.second<<std::endl;
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return viewer.run();
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}
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