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# OgreD3D9HardwareIndexBuffer.cpp

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    00001 /*
    00002 -----------------------------------------------------------------------------
    00003 This source file is part of OGRE
    00004     (Object-oriented Graphics Rendering Engine)
    00005 For the latest info, see http://www.ogre3d.org/
    00006
    00007 Copyright © 2000-2003 The OGRE Team
    00008 Also see acknowledgements in Readme.html
    00009
    00010 This program is free software; you can redistribute it and/or modify it under
    00011 the terms of the GNU Lesser General Public License as published by the Free Software
    00012 Foundation; either version 2 of the License, or (at your option) any later
    00013 version.
    00014
    00015 This program is distributed in the hope that it will be useful, but WITHOUT
    00016 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
    00017 FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
    00018
    00019 You should have received a copy of the GNU Lesser General Public License along with
    00020 this program; if not, write to the Free Software Foundation, Inc., 59 Temple
    00021 Place - Suite 330, Boston, MA 02111-1307, USA, or go to
    00022 http://www.gnu.org/copyleft/lesser.txt.
    00023 -----------------------------------------------------------------------------
    00024 */
    00025 #include "OgreD3D9HardwareIndexBuffer.h"
    00026 #include "OgreD3D9Mappings.h"
    00027 #include "OgreException.h"
    00028
    00029 namespace Ogre {
    00030
    00031     //---------------------------------------------------------------------
    00032     D3D9HardwareIndexBuffer::D3D9HardwareIndexBuffer(HardwareIndexBuffer::IndexType idxType,
    00033         size_t numIndexes, HardwareBuffer::Usage usage, LPDIRECT3DDEVICE9 pDev,
    00034         bool useSystemMemory, bool useShadowBuffer)
    00035         : HardwareIndexBuffer(idxType, numIndexes, usage, useSystemMemory, useShadowBuffer)
    00036     {
    00037         // Create the Index buffer
    00038         HRESULT hr = pDev->CreateIndexBuffer(
    00039             static_cast<UINT>(mSizeInBytes),
    00040             D3D9Mappings::get(usage),
    00041             D3D9Mappings::get(idxType),
    00042 #if OGRE_D3D_MANAGE_BUFFERS
    00043             useSystemMemory? D3DPOOL_SYSTEMMEM :
    00044             // If not system mem, use managed pool UNLESS buffer is discardable
    00045             // if discardable, keeping the software backing is expensive
    00046                 (usage & HardwareBuffer::HBU_DISCARDABLE)? D3DPOOL_DEFAULT : D3DPOOL_MANAGED,
    00047 #else
    00048             useSystemMemory? D3DPOOL_SYSTEMMEM : D3DPOOL_DEFAULT,
    00049 #endif
    00050             &mlpD3DBuffer,
    00051             NULL
    00052             );
    00053
    00054         if (FAILED(hr))
    00055         {
    00056             String msg = DXGetErrorDescription9(hr);
    00057             Except(hr, "Cannot create D3D9 Index buffer: " + msg,
    00058                 "D3D9HardwareIndexBuffer::D3D9HardwareIndexBuffer");
    00059         }
    00060
    00061     }
    00062     //---------------------------------------------------------------------
    00063     D3D9HardwareIndexBuffer::~D3D9HardwareIndexBuffer()
    00064     {
    00065         SAFE_RELEASE(mlpD3DBuffer);
    00066     }
    00067     //---------------------------------------------------------------------
    00068     void* D3D9HardwareIndexBuffer::lockImpl(size_t offset,
    00069         size_t length, LockOptions options)
    00070     {
    00071         void* pBuf;
    00072         DWORD lockOpts;
    00073         if (!(mUsage & HBU_DYNAMIC) && options == HBL_DISCARD)
    00074         {
    00075             // D3D doesn't like discard on non-dynamic buffers
    00076             lockOpts = 0;
    00077         }
    00078         else
    00079         {
    00080             lockOpts= D3D9Mappings::get(options);
    00081         }
    00082         HRESULT hr = mlpD3DBuffer->Lock(
    00083             static_cast<UINT>(offset),
    00084             static_cast<UINT>(length),
    00085             &pBuf,
    00086             lockOpts);
    00087
    00088         if (FAILED(hr))
    00089         {
    00090             Except(hr, "Cannot lock D3D9 Index buffer",
    00091                 "D3D9HardwareIndexBuffer::lock");
    00092         }
    00093
    00094
    00095         return pBuf;
    00096
    00097
    00098     }
    00099     //---------------------------------------------------------------------
    00100     void D3D9HardwareIndexBuffer::unlockImpl(void)
    00101     {
    00102         HRESULT hr = mlpD3DBuffer->Unlock();
    00103     }
    00104     //---------------------------------------------------------------------
    00105     void D3D9HardwareIndexBuffer::readData(size_t offset, size_t length,
    00106         void* pDest)
    00107     {
    00108        // There is no functional interface in D3D, just do via manual
    00109         // lock, copy & unlock
    00110         void* pSrc = this->lock(offset, length, HardwareBuffer::HBL_READ_ONLY);
    00111         memcpy(pDest, pSrc, length);
    00112         this->unlock();
    00113
    00114     }
    00115     //---------------------------------------------------------------------
    00116     void D3D9HardwareIndexBuffer::writeData(size_t offset, size_t length,
    00117             const void* pSource,
    00118             bool discardWholeBuffer)
    00119     {
    00120        // There is no functional interface in D3D, just do via manual
    00121         // lock, copy & unlock
    00122         void* pDst = this->lock(offset, length,
    00123             discardWholeBuffer ? HardwareBuffer::HBL_DISCARD : HardwareBuffer::HBL_NORMAL);
    00124         memcpy(pDst, pSource, length);
    00125         this->unlock();    }
    00126     //---------------------------------------------------------------------
    00127
    00128 }

Copyright © 2002-2003 by The OGRE Team
Last modified Sun Nov 28 19:48:20 2004