FGFS-4.1/OpenSceneGraph
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Added first step to adding pruning of expired image requests.

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This commit is contained in:
Robert Osfield
2012-11-13 11:45:20 +00:00
parent ad1cec1b2e
commit e72af02c2b
3 changed files with 41 additions and 18 deletions
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13
include/osgDB/ImagePager
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@@ -21,6 +21,7 @@
#include <osg/FrameStamp>
#include <OpenThreads/Mutex>
#include <OpenThreads/Atomic>
#include <osgDB/ReaderWriter>
#include <osgDB/Options>
@@ -87,6 +88,14 @@ class OSGDB_EXPORT ImagePager : public osg::NodeVisitor::ImageRequestHandler
/** Merge the changes to the scene graph. */
virtual void updateSceneGraph(const osg::FrameStamp &frameStamp);
/** Signal the image thread that the update, cull and draw has begun for a new frame.
* Note, this is called by the application so that the image pager can go to sleep while the CPU is busy on the main rendering threads. */
virtual void signalBeginFrame(const osg::FrameStamp* framestamp);
/** Signal the image thread that the update, cull and draw dispatch has completed.
* Note, this is called by the application so that the image pager can go to wake back up now the main rendering threads are iddle waiting for the next frame.*/
virtual void signalEndFrame();
int cancel();
protected:
@@ -105,6 +114,7 @@ class OSGDB_EXPORT ImagePager : public osg::NodeVisitor::ImageRequestHandler
_timeToMergeBy(0.0),
_attachmentIndex(-1) {}
unsigned int _frameNumber;
double _timeToMergeBy;
std::string _fileName;
osg::ref_ptr<Options> _loadOptions;
@@ -160,6 +170,9 @@ class OSGDB_EXPORT ImagePager : public osg::NodeVisitor::ImageRequestHandler
bool _done;
bool _databasePagerThreadPaused;
OpenThreads::Atomic _frameNumber;
OpenThreads::Mutex _ir_mutex;
osg::ref_ptr<ReadQueue> _readQueue;
typedef std::vector< osg::ref_ptr<ImageThread> > ImageThreads;