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// File: OpenGl_ResourceCleaner.hxx
// Created: 18.03.11 9:30:00
// Author: Anton POLETAEV
#ifndef _OPENGL_RESOURCECLEANER_H
#define _OPENGL_RESOURCECLEANER_H
#include <OpenGl_tgl_all.hxx>
#include <NCollection_Queue.hxx>
#include <NCollection_List.hxx>
#include <NCollection_Map.hxx>
#include <NCollection_DataMap.hxx>
#include <OpenGl_Resource.hxx>
class OpenGl_Resource;
class Handle_OpenGl_Resource;
typedef NCollection_Queue<Handle_OpenGl_Resource> QueueOfResources;
typedef NCollection_DataMap<GLCONTEXT, QueueOfResources> DataMapOfContextsResources;
typedef NCollection_Map<GLCONTEXT> MapOfContexts;
//! OpenGl_ResourceCleaner should be used to clean OpenGl memory resources;
//! The reason is that the resources might be shared between the contexts and
//! should be cleaned up only while suitable context is active;
class OpenGl_ResourceCleaner
{
public:
//! Constructor
OpenGl_ResourceCleaner();
//! Destructor
virtual ~OpenGl_ResourceCleaner() { }
//! Append OpenGl context to the OpenGl_ResourceCleaner
//! control list.
void AppendContext(GLCONTEXT theContext, Standard_Boolean isShared);
//! Tell the OpenGl_ResourceCleaner to clean up the OpenGl memory resource
//! which has been created by the specified OpenGl context;
//! The context should be in the OpenGl_ResourceCleaner control list.
Standard_Boolean AddResource(GLCONTEXT theContext, Handle_OpenGl_Resource theResource);
//! Cancel clean procedure for all the resources added to the OpenGl_ResourceCleaner.
void Clear();
//! Cancel clean procedure for all the resources of the specific OpenGl context
//! which were added to the OpenGl_ResourceCleaner.
Standard_Boolean Clear(GLCONTEXT theContext);
//! Cancel clean procedure for all of the shared resources.
void ClearShared();
//! Clear the unused resources for active OpenGl context;
//! You should add the cleaner resources by AddResources method;
//! It is suggested to call this method right before the OpenGl
//! new frame drawing procedure starts.
void Cleanup();
//! Remove the OpenGl context from the OpenGl_ResourceCleaner control list.
void RemoveContext(GLCONTEXT theContext);
//! Get any of shared contexts from the OpenGl_ResourceCleaner list
//! to share resources with a new one
GLCONTEXT GetSharedContext() const;
//! Get the global instance of OpenGl_ResourceCleaner
static OpenGl_ResourceCleaner* GetInstance();
private:
DataMapOfContextsResources myInstanceQueue; // map for queues of non-shared context's resources
QueueOfResources mySharedQueue; // queue of shared context's resources
MapOfContexts mySharedContexts; // the control list of shared contexts
};
#endif
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