// TnzCore includes

#include "tsmartpointer.h"

// tcg includes

#include "tcg/tcg_list.h"

#include "tgldisplaylistsmanager.h"

//***********************************************************************************************

//    Local namespace - declarations

//***********************************************************************************************

namespace {

struct ProxyReference {

  TGLDisplayListsProxy *m_proxy;

  int m_refCount;

  ProxyReference(TGLDisplayListsProxy *proxy) : m_proxy(proxy), m_refCount() {}

};

}  // namespace

//***********************************************************************************************

//    Local namespace - globals

//***********************************************************************************************

namespace {

tcg::list<proxyreference> m_proxies;</proxyreference>

std::map<tglcontext, int=""> m_proxyIdsByContext;</tglcontext,>

}  // namespace

//***********************************************************************************************

//    TGLDisplayListsManager  implementation

//***********************************************************************************************

TGLDisplayListsManager *TGLDisplayListsManager::instance() {

  static TGLDisplayListsManager theInstance;

  return &theInstance;

}

//-----------------------------------------------------------------------------------

int TGLDisplayListsManager::storeProxy(TGLDisplayListsProxy *proxy) {

  return m_proxies.push_back(ProxyReference(proxy));

}

//-----------------------------------------------------------------------------------

void TGLDisplayListsManager::attachContext(int dlSpaceId, TGlContext context) {

  m_proxyIdsByContext.insert(std::make_pair(context, dlSpaceId));

  ++m_proxies[dlSpaceId].m_refCount;

}

//-----------------------------------------------------------------------------------

void TGLDisplayListsManager::releaseContext(TGlContext context) {

  std::map<tglcontext, int="">::iterator it = m_proxyIdsByContext.find(context);</tglcontext,>

  assert(it != m_proxyIdsByContext.end());

  if (it == m_proxyIdsByContext.end()) return;

  int dlSpaceId = it->second;

  if (--m_proxies[dlSpaceId].m_refCount <= 0) {

    // Notify observers first

    observers_container::const_iterator ot, oEnd = observers().end();

    for (ot = observers().begin(); ot != oEnd; ++ot)

      static_cast<observer *="">(*ot)->onDisplayListDestroyed(dlSpaceId);</observer>

    // Then, destroy stuff

    delete m_proxies[dlSpaceId].m_proxy;

    m_proxies.erase(dlSpaceId);

  }

  m_proxyIdsByContext.erase(it);

}

//-----------------------------------------------------------------------------------

int TGLDisplayListsManager::displayListsSpaceId(TGlContext context) {

  std::map<tglcontext, int="">::iterator it = m_proxyIdsByContext.find(context);</tglcontext,>

  return (it == m_proxyIdsByContext.end()) ? -1 : it->second;

}

//-----------------------------------------------------------------------------------

TGLDisplayListsProxy *TGLDisplayListsManager::dlProxy(int dlSpaceId) {

  return m_proxies[dlSpaceId].m_proxy;

}