source: GTP/trunk/App/Demos/Geom/Shark3D/src/drv_d3d9_visib.cpp @ 2236

///////////////////////////////////////////////////////////////////////////////
//
//      ##  ######
//       ######  ###
//  ## ###############        Shark 3D Engine (www.shark3d.com)
//   ########## # # #
//    ########                Copyright (c) 1996-2006 Spinor GmbH.
//   ######### # # #          All rights reserved.
//  ##   ##########
//      ##
//
///////////////////////////////////////////////////////////////////////////////

#include "drv_d3d9_visib.h"

#define S3D_DRV_D3D9_VISIB_PIXCNT 4

///////////////////////////////////////////////////////////////////////////////

S3D_UTIL_RECOG_DEFINEINFO(s3d_CDrvD3d9Visib);

s3d_CDrvD3d9Visib::s3d_CDrvD3d9Visib(
        s3d_CDrvD3d9VisibMgr *VisibMgr, 
        s3d_CDrvD3d9QueryOcclusion &QueryOcclusion)
{
    S3D_UTIL_RECOG_INITOBJ(s3d_CDrvD3d9Visib);

    m_VisibMgr = VisibMgr;
    m_QueryOcclusion = QueryOcclusion;
}

bool s3d_CDrvD3d9Visib::IsAvail()
{
    return m_QueryOcclusion.IsAvail(false);
}

bool s3d_CDrvD3d9Visib::GetResult(bool Wait)
{
    DWORD Result = m_QueryOcclusion.GetResult(Wait);
    bool IsVisib = Result > S3D_DRV_D3D9_VISIB_PIXCNT;
    return IsVisib;
}

void s3d_CDrvD3d9Visib::RefCntGotDownToZero()
{
    m_VisibMgr->AddToPool(this);
}

///////////////////////////////////////////////////////////////////////////////

s3d_CDrvD3d9VisibMgr::s3d_CDrvD3d9VisibMgr(
            s3d_CUtilMsgHandler *MsgHandler, 
            s3d_CDrvD3d9Env &Env, s3d_CDrvD3d9Param *D3dParam, 
            s3d_CDrvD3d9Device &D3dDev)
{
    m_MsgHandler = MsgHandler;
    m_Env = &Env;
    m_D3dDev = D3dDev;

    m_QueryOcclusion.Init(m_Env, D3dDev);
}

void s3d_CDrvD3d9VisibMgr::BeginVisib()
{
    s3d_CDrvD3d9VisibPtr Visib = m_VisibFreePool.ExtractBack();
    if(!Visib)
        Visib = S3D_SYS_NEW s3d_CDrvD3d9Visib(this, m_QueryOcclusion);

    m_QueryOcclusion.Begin();
    m_VisibArray.InsertBack(Visib);
}

s3d_CDrvGfxVisibPtr s3d_CDrvD3d9VisibMgr::EndVisib()
{
    s3d_CDrvD3d9VisibPtr Visib = m_VisibArray.ExtractBack();
    m_QueryOcclusion.End();
    return Visib.Get();
}

void s3d_CDrvD3d9VisibMgr::Park()
{
    m_VisibArray.Reset();
    m_QueryOcclusion.Reset();
}

void s3d_CDrvD3d9VisibMgr::Unpark()
{
    m_QueryOcclusion.Init(m_Env, m_D3dDev);
}

void s3d_CDrvD3d9VisibMgr::AddToPool(
        s3d_CDrvD3d9Visib *Visib)
{
    m_VisibFreePool.InsertBack(Visib);
}

///////////////////////////////////////////////////////////////////////////////