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