FGFS-4.1/OpenSceneGraph
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Improvements to the handling of deletion of OpenGL rendering objets such as

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display lists and textures object such that they can be deleted according
to an available amount of time given to do deletes.
This commit is contained in:
Robert Osfield
2003-07-16 09:52:43 +00:00
parent 82008d5ecd
commit a0d0803f1f
5 changed files with 153 additions and 96 deletions
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37
src/osg/VertexProgram.cpp
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@@ -14,14 +14,17 @@
#include <osg/GLExtensions>
#include <osg/VertexProgram>
#include <osg/State>
#include <osg/Timer>
#include <list>
using namespace osg;
// static cache of deleted vertex programs which can only
// by completely deleted once the appropriate OpenGL context
// is set.
typedef std::vector<GLuint> VertexProgramObjectVector;
typedef std::map<unsigned int,VertexProgramObjectVector> DeletedVertexProgramObjectCache;
typedef std::list<GLuint> VertexProgramObjectList;
typedef std::map<unsigned int,VertexProgramObjectList> DeletedVertexProgramObjectCache;
static DeletedVertexProgramObjectCache s_deletedVertexProgramObjectCache;
void VertexProgram::deleteVertexProgramObject(unsigned int contextID,GLuint handle)
@@ -34,30 +37,34 @@ void VertexProgram::deleteVertexProgramObject(unsigned int contextID,GLuint hand
}
void VertexProgram::flushDeletedVertexProgramObjects(unsigned int contextID,double currentTime, double& availableTime)
void VertexProgram::flushDeletedVertexProgramObjects(unsigned int contextID,double /*currentTime*/, double& availableTime)
{
const Extensions* extensions = getExtensions(contextID,true);
// if no time available don't try to flush objects.
if (availableTime<=0.0) return;
if (!extensions->isVertexProgramSupported())
return;
const osg::Timer& timer = *osg::Timer::instance();
osg::Timer_t start_tick = timer.tick();
double elapsedTime = 0.0;
DeletedVertexProgramObjectCache::iterator citr = s_deletedVertexProgramObjectCache.find(contextID);
if (citr!=s_deletedVertexProgramObjectCache.end())
{
VertexProgramObjectVector vpObjectSet;
vpObjectSet.reserve(1000);
const Extensions* extensions = getExtensions(contextID,true);
// this swap will transfer the content of and empty citr->second
// in one quick pointer change.
vpObjectSet.swap(citr->second);
for(VertexProgramObjectVector::iterator titr=vpObjectSet.begin();
titr!=vpObjectSet.end();
++titr)
VertexProgramObjectList& vpol = citr->second;
for(VertexProgramObjectList::iterator titr=vpol.begin();
titr!=vpol.end() && elapsedTime<availableTime;
)
{
extensions->glDeletePrograms( 1L, &(*titr ) );
titr = vpol.erase(titr);
elapsedTime = timer.delta_s(start_tick,timer.tick());
}
}
availableTime -= elapsedTime;
}