75 lines
1.8 KiB
C++
75 lines
1.8 KiB
C++
#if defined(_MSC_VER)
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#pragma warning( disable : 4786 )
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#endif
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#include <stdio.h>
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#include <list>
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#include <set>
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#include <osgUtil/DisplayRequirementsVisitor>
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using namespace osg;
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using namespace osgUtil;
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DisplayRequirementsVisitor::DisplayRequirementsVisitor()
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{
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setTraversalMode(NodeVisitor::TRAVERSE_ALL_CHILDREN);
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}
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void DisplayRequirementsVisitor::applyStateSet(StateSet& stateset)
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{
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if (!_ds) _ds = osgNew osg::DisplaySettings;
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unsigned int min = 0; // assume stencil not needed by this stateset.
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if (stateset.getMode(GL_STENCIL_TEST) & StateAttribute::ON)
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{
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min = 1; // number stencil bits we need at least.
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}
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if (stateset.getAttribute(StateAttribute::STENCIL))
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{
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min = 1; // number stencil bits we need at least.
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}
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if (min>_ds->getMinimumNumStencilBits())
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{
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// only update if new minimum exceeds previous minimum.
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_ds->setMinimumNumStencilBits(min);
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}
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}
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void DisplayRequirementsVisitor::apply(Node& node)
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{
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osg::StateSet* stateset = node.getStateSet();
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if (stateset) applyStateSet(*stateset);
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traverse(node);
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}
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void DisplayRequirementsVisitor::apply(Geode& geode)
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{
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osg::StateSet* geode_stateset = geode.getStateSet();
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if (geode_stateset) applyStateSet(*geode_stateset);
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for(unsigned int i = 0; i < geode.getNumDrawables(); i++ )
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{
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osg::StateSet* stateset = geode.getDrawable(i)->getStateSet();
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if (stateset) applyStateSet(*stateset);
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}
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}
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void DisplayRequirementsVisitor::apply(Impostor& impostor)
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{
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if (!_ds) _ds = osgNew osg::DisplaySettings;
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unsigned int min = 1; // number alpha bits we need at least.
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if (min>_ds->getMinimumNumAlphaBits())
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{
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// only update if new minimum exceeds previous minimum.
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_ds->setMinimumNumAlphaBits(min);
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}
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apply((Node&)impostor);
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}
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