OgreGLHardwareBufferManager.h
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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 (c) 2000-2012 Torus Knot Software Ltd
00008 
00009 Permission is hereby granted, free of charge, to any person obtaining a copy
00010 of this software and associated documentation files (the "Software"), to deal
00011 in the Software without restriction, including without limitation the rights
00012 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00013 copies of the Software, and to permit persons to whom the Software is
00014 furnished to do so, subject to the following conditions:
00015 
00016 The above copyright notice and this permission notice shall be included in
00017 all copies or substantial portions of the Software.
00018 
00019 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00020 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00021 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00022 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00023 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00024 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00025 THE SOFTWARE.
00026 -----------------------------------------------------------------------------
00027 */
00028 #ifndef __GLHARWAREBUFFERMANAGER_H__
00029 #define __GLHARWAREBUFFERMANAGER_H__
00030 
00031 #include "OgreGLPrerequisites.h"
00032 #include "OgreHardwareBufferManager.h"
00033 
00034 namespace Ogre {
00035 
00036 // Default threshold at which glMapBuffer becomes more efficient than glBufferSubData (32k?)
00037 #   define OGRE_GL_DEFAULT_MAP_BUFFER_THRESHOLD (1024 * 32)
00038 
00039 
00041     class _OgreGLExport GLHardwareBufferManagerBase : public HardwareBufferManagerBase
00042     {
00043     protected:
00044         char* mScratchBufferPool;
00045         OGRE_MUTEX(mScratchMutex)
00046         size_t mMapBufferThreshold;
00047 
00048     public:
00049         GLHardwareBufferManagerBase();
00050         ~GLHardwareBufferManagerBase();
00052         HardwareVertexBufferSharedPtr createVertexBuffer(size_t vertexSize, 
00053             size_t numVerts, HardwareBuffer::Usage usage, bool useShadowBuffer = false);
00055         HardwareIndexBufferSharedPtr createIndexBuffer(
00056             HardwareIndexBuffer::IndexType itype, size_t numIndexes, 
00057             HardwareBuffer::Usage usage, bool useShadowBuffer = false);
00059         RenderToVertexBufferSharedPtr createRenderToVertexBuffer();
00061         static GLenum getGLUsage(unsigned int usage);
00062 
00064         static GLenum getGLType(unsigned int type);
00065 
00073         void* allocateScratch(uint32 size);
00074 
00076         void deallocateScratch(void* ptr);
00077 
00080         size_t getGLMapBufferThreshold() const;
00081         void setGLMapBufferThreshold( const size_t value );
00082     };
00083 
00085     class _OgreGLExport GLHardwareBufferManager : public HardwareBufferManager
00086     {
00087     public:
00088         GLHardwareBufferManager()
00089             : HardwareBufferManager(OGRE_NEW GLHardwareBufferManagerBase()) 
00090         {
00091 
00092         }
00093         ~GLHardwareBufferManager()
00094         {
00095             OGRE_DELETE mImpl;
00096         }
00097 
00098 
00099 
00101         static GLenum getGLUsage(unsigned int usage) 
00102         { return GLHardwareBufferManagerBase::getGLUsage(usage); }
00103 
00105         static GLenum getGLType(unsigned int type)
00106         { return GLHardwareBufferManagerBase::getGLType(type); }
00107 
00115         void* allocateScratch(uint32 size)
00116         {
00117             return static_cast<GLHardwareBufferManagerBase*>(mImpl)->allocateScratch(size);
00118         }
00119 
00121         void deallocateScratch(void* ptr)
00122         {
00123             static_cast<GLHardwareBufferManagerBase*>(mImpl)->deallocateScratch(ptr);
00124         }
00125 
00128         size_t getGLMapBufferThreshold() const
00129         {
00130             return static_cast<GLHardwareBufferManagerBase*>(mImpl)->getGLMapBufferThreshold();
00131         }
00132         void setGLMapBufferThreshold( const size_t value )
00133         {
00134             static_cast<GLHardwareBufferManagerBase*>(mImpl)->setGLMapBufferThreshold(value);
00135         }
00136 
00137     };
00138 
00139 }
00140 
00141 #endif // __GLHARWAREBUFFERMANAGER_H__

Copyright © 2012 Torus Knot Software Ltd
Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 3.0 Unported License.
Last modified Sun Sep 2 2012 07:27:21