[5] | 1 | /* |
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| 2 | ----------------------------------------------------------------------------- |
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| 3 | This source file is part of OGRE |
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| 4 | (Object-oriented Graphics Rendering Engine) |
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| 5 | For the latest info, see http://www.ogre3d.org/ |
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| 6 | |
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| 7 | Copyright (c) 2000-2006 Torus Knot Software Ltd |
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| 8 | Also see acknowledgements in Readme.html |
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| 9 | |
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| 10 | This program is free software; you can redistribute it and/or modify it under |
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| 11 | the terms of the GNU Lesser General Public License as published by the Free Software |
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| 12 | Foundation; either version 2 of the License, or (at your option) any later |
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| 13 | version. |
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| 14 | |
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| 15 | This program is distributed in the hope that it will be useful, but WITHOUT |
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| 16 | ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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| 17 | FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. |
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| 18 | |
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| 19 | You should have received a copy of the GNU Lesser General Public License along with |
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| 20 | this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
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| 21 | Place - Suite 330, Boston, MA 02111-1307, USA, or go to |
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| 22 | http://www.gnu.org/copyleft/lesser.txt. |
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| 23 | |
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| 24 | You may alternatively use this source under the terms of a specific version of |
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| 25 | the OGRE Unrestricted License provided you have obtained such a license from |
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| 26 | Torus Knot Software Ltd. |
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| 27 | ----------------------------------------------------------------------------- |
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| 28 | */ |
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| 29 | #ifndef __GLHARWAREBUFFERMANAGER_H__ |
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| 30 | #define __GLHARWAREBUFFERMANAGER_H__ |
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| 31 | |
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| 32 | #include "OgreGLPrerequisites.h" |
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| 33 | #include "OgreHardwareBufferManager.h" |
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| 34 | |
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| 35 | namespace Ogre { |
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| 36 | |
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| 37 | // Threshold at which glMapBuffer becomes more efficient than glBufferSubData (32k?) |
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| 38 | // non-Win32 machines are having issues with this, looks like buffer corruption |
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| 39 | // disable for now until we figure out where the problem lies |
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| 40 | #if OGRE_PLATFORM == OGRE_PLATFORM_WIN32 |
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| 41 | # define OGRE_GL_MAP_BUFFER_THRESHOLD (1024 * 32) |
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| 42 | #else |
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| 43 | # define OGRE_GL_MAP_BUFFER_THRESHOLD 0 |
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| 44 | #endif |
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| 45 | |
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| 46 | /** Implementation of HardwareBufferManager for OpenGL. */ |
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| 47 | class _OgrePrivate GLHardwareBufferManager : public HardwareBufferManager |
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| 48 | { |
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| 49 | protected: |
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| 50 | char* mScratchBufferPool; |
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| 51 | OGRE_MUTEX(mScratchMutex) |
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| 52 | |
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| 53 | public: |
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| 54 | GLHardwareBufferManager(); |
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| 55 | ~GLHardwareBufferManager(); |
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| 56 | /// Creates a vertex buffer |
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| 57 | HardwareVertexBufferSharedPtr createVertexBuffer(size_t vertexSize, |
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| 58 | size_t numVerts, HardwareBuffer::Usage usage, bool useShadowBuffer = false); |
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| 59 | /// Create a hardware vertex buffer |
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| 60 | HardwareIndexBufferSharedPtr createIndexBuffer( |
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| 61 | HardwareIndexBuffer::IndexType itype, size_t numIndexes, |
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| 62 | HardwareBuffer::Usage usage, bool useShadowBuffer = false); |
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| 63 | |
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| 64 | /// Utility function to get the correct GL usage based on HBU's |
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| 65 | static GLenum getGLUsage(unsigned int usage); |
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| 66 | |
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| 67 | /// Utility function to get the correct GL type based on VET's |
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| 68 | static GLenum getGLType(unsigned int type); |
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| 69 | |
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| 70 | /** Allocator method to allow us to use a pool of memory as a scratch |
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| 71 | area for hardware buffers. This is because glMapBuffer is incredibly |
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| 72 | inefficient, seemingly no matter what options we give it. So for the |
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| 73 | period of lock/unlock, we will instead allocate a section of a local |
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| 74 | memory pool, and use glBufferSubDataARB / glGetBufferSubDataARB |
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| 75 | instead. |
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| 76 | */ |
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| 77 | void* allocateScratch(uint32 size); |
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| 78 | |
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| 79 | /// @see allocateScratch |
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| 80 | void deallocateScratch(void* ptr); |
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| 81 | }; |
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| 82 | |
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| 83 | } |
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| 84 | |
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| 85 | #endif // __GLHARWAREBUFFERMANAGER_H__ |
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