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OgreD3D9HardwareVertexBuffer.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 "OgreD3D9HardwareVertexBuffer.h"
00026 #include "OgreD3D9Mappings.h"
00027 #include "OgreException.h"
00028 
00029 namespace Ogre {
00030 
00031     //---------------------------------------------------------------------
00032     D3D9HardwareVertexBuffer::D3D9HardwareVertexBuffer(size_t vertexSize, 
00033         size_t numVertices, HardwareBuffer::Usage usage, LPDIRECT3DDEVICE9 pDev, 
00034         bool useSystemMemory, bool useShadowBuffer)
00035         : HardwareVertexBuffer(vertexSize, numVertices, usage, useSystemMemory, useShadowBuffer)
00036     {
00037         // Create the vertex buffer
00038         HRESULT hr = pDev->CreateVertexBuffer(
00039             static_cast<UINT>(mSizeInBytes), 
00040             D3D9Mappings::get(usage), 
00041             0, // No FVF here, thankyou
00042             useSystemMemory? D3DPOOL_SYSTEMMEM : D3DPOOL_DEFAULT, 
00043             &mlpD3DBuffer,
00044             NULL);
00045         if (FAILED(hr))
00046         {
00047             String msg = DXGetErrorDescription9(hr);
00048             Except(hr, "Cannot create D3D9 vertex buffer: " + msg, 
00049                 "D3D9HardwareVertexBuffer::D3D9HardwareVertexBuffer");
00050         }
00051 
00052     }
00053     //---------------------------------------------------------------------
00054     D3D9HardwareVertexBuffer::~D3D9HardwareVertexBuffer()
00055     {
00056         SAFE_RELEASE(mlpD3DBuffer);
00057     }
00058     //---------------------------------------------------------------------
00059     void* D3D9HardwareVertexBuffer::lockImpl(size_t offset, 
00060         size_t length, LockOptions options)
00061     {
00062         void* pBuf;
00063         DWORD lockOpts;
00064         if (!(mUsage & HBU_DYNAMIC) && 
00065                 (options == HBL_DISCARD || options == HBL_NO_OVERWRITE))
00066         {
00067             // D3D doesn't like discard or no_overwrite on non-dynamic buffers
00068             lockOpts = 0;
00069         }
00070         else
00071         {
00072             lockOpts= D3D9Mappings::get(options);
00073         } 
00074         HRESULT hr = mlpD3DBuffer->Lock(
00075             static_cast<UINT>(offset), 
00076             static_cast<UINT>(length), 
00077             &pBuf,
00078             lockOpts);
00079 
00080         if (FAILED(hr))
00081         {
00082             Except(hr, "Cannot lock D3D9 vertex buffer", 
00083                 "D3D9HardwareVertexBuffer::lock");
00084         }
00085 
00086         return pBuf;
00087     }
00088     //---------------------------------------------------------------------
00089     void D3D9HardwareVertexBuffer::unlockImpl(void)
00090     {
00091         HRESULT hr = mlpD3DBuffer->Unlock();
00092     }
00093     //---------------------------------------------------------------------
00094     void D3D9HardwareVertexBuffer::readData(size_t offset, size_t length, 
00095         void* pDest)
00096     {
00097         // There is no functional interface in D3D, just do via manual 
00098         // lock, copy & unlock
00099         void* pSrc = this->lock(offset, length, HardwareBuffer::HBL_READ_ONLY);
00100         memcpy(pDest, pSrc, length);
00101         this->unlock();
00102 
00103     }
00104     //---------------------------------------------------------------------
00105     void D3D9HardwareVertexBuffer::writeData(size_t offset, size_t length, 
00106             const void* pSource,
00107             bool discardWholeBuffer)
00108     {
00109         // There is no functional interface in D3D, just do via manual 
00110         // lock, copy & unlock
00111         void* pDst = this->lock(offset, length, 
00112             discardWholeBuffer ? HardwareBuffer::HBL_DISCARD : HardwareBuffer::HBL_NORMAL);
00113         memcpy(pDst, pSource, length);
00114         this->unlock();
00115     }
00116     //---------------------------------------------------------------------
00117 
00118 }

Copyright © 2002-2003 by The OGRE Team
Last modified Fri May 14 23:22:02 2004