openscenegraph
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#include <DatabasePager>
Classes | |
struct | DatabaseRequest |
class | DatabaseThread |
struct | PagedLODList |
struct | ReadQueue |
struct | RequestQueue |
Public Types | |
enum | DrawablePolicy { DO_NOT_MODIFY_DRAWABLE_SETTINGS , USE_DISPLAY_LISTS , USE_VERTEX_BUFFER_OBJECTS , USE_VERTEX_ARRAYS } |
typedef OpenThreads::Thread::ThreadPriority | ThreadPriority |
typedef std::set< osg::ref_ptr< osg::StateSet > > | StateSetList |
typedef std::vector< osg::ref_ptr< osg::Drawable > > | DrawableList |
typedef std::list< osg::ref_ptr< osg::Object > > | ObjectList |
Static Public Member Functions | |
static osg::ref_ptr< DatabasePager > & | prototype () |
static DatabasePager * | create () |
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static OpenThreads::Mutex * | getGlobalReferencedMutex () |
static void | setDeleteHandler (DeleteHandler *handler) |
static DeleteHandler * | getDeleteHandler () |
Protected Types | |
typedef std::vector< osg::ref_ptr< DatabaseThread > > | DatabaseThreadList |
Protected Member Functions | |
virtual | ~DatabasePager () |
void | compileCompleted (DatabaseRequest *databaseRequest) |
virtual void | removeExpiredSubgraphs (const osg::FrameStamp &frameStamp) |
void | addLoadedDataToSceneGraph (const osg::FrameStamp &frameStamp) |
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virtual | ~DatabaseRequestHandler () |
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virtual | ~Referenced () |
void | signalObserversAndDelete (bool signalDelete, bool doDelete) const |
void | deleteUsingDeleteHandler () const |
Friends | |
class | DatabaseThread |
struct | DatabaseRequest |
class | FindCompileableGLObjectsVisitor |
struct | DatabasePagerCompileCompletedCallback |
class | FindPagedLODsVisitor |
struct | SortFileRequestFunctor |
Database paging class which manages the loading of files in a background thread, and synchronizing of loaded models with the main scene graph.
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typedef std::vector< osg::ref_ptr<osg::Drawable> > osgDB::DatabasePager::DrawableList |
typedef std::list< osg::ref_ptr<osg::Object> > osgDB::DatabasePager::ObjectList |
typedef std::set< osg::ref_ptr<osg::StateSet> > osgDB::DatabasePager::StateSetList |
osgDB::DatabasePager::DatabasePager | ( | ) |
osgDB::DatabasePager::DatabasePager | ( | const DatabasePager & | rhs | ) |
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Add the loaded data to the scene graph.
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Cancel the database pager thread(s).
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Clear all internally cached structures.
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Create a shallow copy on the DatabasePager.
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create a DatabasePager by cloning DatabasePager::prototype().
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Get whether new database request calls are accepted or ignored.
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Get whether newly loaded textures should have a PixelBufferObject assigned to them.
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Get the average time between the first request for a tile to be loaded and the time of its merge into the main scene graph.
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Get whether the database pager thread should is paused or not.
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Report how many items are in the _dataToCompileList queue
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Report how many items are in the _dataToMergeList queue
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Get whether the removed subgraphs should be deleted in the database thread or not.
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Get whether the database pager should pre compile OpenGL objects before allowing them to be merged into the scene graph.
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Get how loaded drawables should be handled w.r.t their display list/vertex buffer object/vertex array settings.
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Report how many items are in the _fileRequestList queue
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Get the incremental compile operation.
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Set whether newly loaded textures should have their MaxAnisotopy set to a specified value.
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Get the maximum time between the first request for a tile to be loaded and the time of its merge into the main scene graph.
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Get the minimum time between the first request for a tile to be loaded and the time of its merge into the main scene graph.
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Get the number of frames that are currently active.
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bool osgDB::DatabasePager::getRequestsInProgress | ( | ) | const |
Report whether any requests are in the pager.
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Get the target maximum number of PagedLOD to maintain in memory.
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Get whether newly loaded textures should have their UnrefImageDataAfterApply set to a specified value.
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get the prototype singleton used by DatabasePager::create().
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Find all PagedLOD nodes in a subgraph and register them with the DatabasePager so it can keep track of expired nodes. note, should be only be called from the update thread.
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Iterate through the active PagedLOD nodes children removing children which haven't been visited since specified expiryTime. note, should be only be called from the update thread.
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Add a request to load a node file to end the database request list.
Implements osg::NodeVisitor::DatabaseRequestHandler.
bool osgDB::DatabasePager::requiresRedraw | ( | ) | const |
Return true if there are GL objects that need to be compiled by a draw traversal.
bool osgDB::DatabasePager::requiresUpdateSceneGraph | ( | ) | const |
Return true if there are pending updates to the scene graph that require a call to updateSceneGraph(double).
void osgDB::DatabasePager::resetStats | ( | ) |
Reset the Stats variables.
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Set whether new database request calls are accepted or ignored.
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Set whether newly loaded textures should have a PixelBufferObject assigned to them to aid download to the GPU.
void osgDB::DatabasePager::setDatabasePagerThreadPause | ( | bool | pause | ) |
Set whether the database pager thread should be paused or not.
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Set whether the removed subgraphs should be deleted in the database thread or not.
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Set whether the database pager should pre compile OpenGL objects before allowing them to be merged into the scene graph. Pre compilation helps reduce the chances of frame drops, but also slows the speed at which tiles are merged as they have to be compiled first.
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Set how loaded drawables should be handled w.r.t their display list/vertex buffer object/vertex array settings.
void osgDB::DatabasePager::setIncrementalCompileOperation | ( | osgUtil::IncrementalCompileOperation * | ico | ) |
Set the incremental compile operation. Used to manage the OpenGL object compilation and merging of subgraphs in a way that avoids overloading the rendering of frame with too many new objects in one frame.
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Set whether newly loaded textures should have their MaxAnisotopy set to a specified value.
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int osgDB::DatabasePager::setSchedulePriority | ( | OpenThreads::Thread::ThreadPriority | priority | ) |
Set the priority of the database pager thread(s).
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Set the target maximum number of PagedLOD to maintain in memory. Note, if more than the target number are required for rendering of a frame then these active PagedLOD are excempt from being expiried. But once the number of active drops back below the target the inactive PagedLOD will be trimmed back to the target number.
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Set whether newly loaded textures should have their UnrefImageDataAfterApply set to a specified value.
void osgDB::DatabasePager::setUpThreads | ( | unsigned int | totalNumThreads = 2 , |
unsigned int | numHttpThreads = 1 |
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Signal the database thread that the update, cull and draw has begun for a new frame. Note, this is called by the application so that the database pager can go to sleep while the CPU is busy on the main rendering threads.
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Signal the database thread that the update, cull and draw dispatch has completed. Note, this is called by the application so that the database pager can go to wake back up now the main rendering threads are iddle waiting for the next frame.
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Merge the changes to the scene graph by calling calling removeExpiredSubgraphs then addLoadedDataToSceneGraph. Note, must only be called from single thread update phase.
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