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Provide SGReaderWriterOptions::copyOrCreate(const osgDB::Options*).

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This functions tries to preserve the database options as much
as possible and guarantees to return a non zero options
pointer.
This commit is contained in:
Mathias Froehlich 2012-03-04 07:16:59 +01:00
parent 11fd888ed8
commit 1473eabc7c
1 changed files with 12 additions and 0 deletions
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12
simgear/scene/util/SGReaderWriterOptions.hxx
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@ -21,6 +21,7 @@
#define SGREADERWRITEROPTIONS_HXX 1
#include <osgDB/Options>
#include <osgDB/Registry>
#include <simgear/scene/model/modellib.hxx>
#include <simgear/props/props.hxx>
@ -92,6 +93,17 @@ public:
void setInstantiateEffects(bool instantiateEffects)
{ _instantiateEffects = instantiateEffects; }
static SGReaderWriterOptions* copyOrCreate(const osgDB::Options* options)
{
if (!options)
options = osgDB::Registry::instance()->getOptions();
if (!options)
return new SGReaderWriterOptions;
if (!dynamic_cast<const SGReaderWriterOptions*>(options))
return new SGReaderWriterOptions(*options);
return new SGReaderWriterOptions(*static_cast<const SGReaderWriterOptions*>(options));
}
protected:
virtual ~SGReaderWriterOptions() {}