DtFrameTextureBlitterManager.h

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/******************************************************************************
** Copyright (c) 2023 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvOsg/vrvOsg.h>
#include <vrvOsg/DtFrameTextureBlitterManagerUserData.h>
#include <vrvOsg/DtThreadCameraStreamDataManager.h>

#include <vrvUtil/DtSignalConnectionManager.h>

#include <osg/observer_ptr>
#include <osg/Camera>

namespace osg
{
   class RenderInfo;
}

namespace makVrv
{
   class DtGlRenderTexture;

   class DtGlDeleteObjectManager;

   class DtChannelManager;
   class DtChannel;


   class DT_DLL_VRVOSG DtFrameTextureBlitterManager : public DtVirtualBaseClass
   {
   public:
      virtual ~DtFrameTextureBlitterManager();

      DtFrameTextureBlitterManager() = delete;
      DtFrameTextureBlitterManager(const DtFrameTextureBlitterManager& rhs) = delete;
      DtFrameTextureBlitterManager& operator=(const DtFrameTextureBlitterManager& rhs) = delete;
   protected:
      DtFrameTextureBlitterManager(DtDe& de);

   public:
      virtual DtGlRenderTexture* updateAndGetDepthTexture(osg::RenderInfo& renderInfo);

      virtual DtGlRenderTexture* findDepthTexture(const osg::Camera* osgCamera);


   public:
      static DtFrameTextureBlitterManager& instance(DtDe& de);

      static const std::string& theClassName();

   protected:
      virtual void slot_channelDestroyed(DtChannelManager* channelManager, DtChannel* channel);

      virtual void deleteRenderTextureForCamera(const osg::Camera* osgCamera);

      DtFrameTextureBlitterManagerUserData* findUserData(const osg::Camera* osgCamera);
      DtKeyedData* findTcsData(const osg::Camera* osgCamera);
   protected:
      DtDe& myDe;

      DtGlDeleteObjectManager& myGlDeleteObjectManager;

      // For listening for channel creation
      DtSignalConnectionManager myConnections;

      DtThreadCameraStreamDataManagerBase* myTcsDataManager = nullptr;
      DtFrameTextureBlitterManagerUserDataCreator& myUserDataCreator;
   };
}