/* ----------------------------------------------------------------------------- This source file is part of OGRE (Object-oriented Graphics Rendering Engine) For the latest info, see http://www.ogre3d.org/ Copyright (c) 2000-2009 Torus Knot Software Ltd Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. ----------------------------------------------------------------------------- */ #include "OgreGLHardwareBufferManager.h" #include "OgreGLHardwareVertexBuffer.h" #include "OgreGLHardwareIndexBuffer.h" #include "OgreGLRenderToVertexBuffer.h" #include "OgreHardwareBuffer.h" #include "OgreRoot.h" #include "OgreRenderSystem.h" #include "OgreRenderSystemCapabilities.h" namespace Ogre { //----------------------------------------------------------------------- // Scratch pool management (32 bit structure) struct GLScratchBufferAlloc { /// Size in bytes uint32 size: 31; /// Free? (pack with size) uint32 free: 1; }; #define SCRATCH_POOL_SIZE 1 * 1024 * 1024 #define SCRATCH_ALIGNMENT 32 //--------------------------------------------------------------------- GLHardwareBufferManagerBase::GLHardwareBufferManagerBase() : mScratchBufferPool(NULL), mMapBufferThreshold(OGRE_GL_DEFAULT_MAP_BUFFER_THRESHOLD) { // Init scratch pool // TODO make it a configurable size? // 32-bit aligned buffer mScratchBufferPool = static_cast(OGRE_MALLOC_ALIGN(SCRATCH_POOL_SIZE, MEMCATEGORY_GEOMETRY, SCRATCH_ALIGNMENT)); GLScratchBufferAlloc* ptrAlloc = (GLScratchBufferAlloc*)mScratchBufferPool; ptrAlloc->size = SCRATCH_POOL_SIZE - sizeof(GLScratchBufferAlloc); ptrAlloc->free = 1; // non-Win32 machines are having issues glBufferSubData, looks like buffer corruption // disable for now until we figure out where the problem lies # if OGRE_PLATFORM != OGRE_PLATFORM_WIN32 mMapBufferThreshold = 0; # endif // Win32 machines with ATI GPU are having issues glMapBuffer, looks like buffer corruption // disable for now until we figure out where the problem lies # if OGRE_PLATFORM == OGRE_PLATFORM_WIN32 if (Root::getSingleton().getRenderSystem()->getCapabilities()->getVendor() == GPU_ATI) { mMapBufferThreshold = 0xffffffffUL /* maximum unsigned long value */; } # endif } //----------------------------------------------------------------------- GLHardwareBufferManagerBase::~GLHardwareBufferManagerBase() { destroyAllDeclarations(); destroyAllBindings(); OGRE_FREE_ALIGN(mScratchBufferPool, MEMCATEGORY_GEOMETRY, SCRATCH_ALIGNMENT); } //----------------------------------------------------------------------- HardwareVertexBufferSharedPtr GLHardwareBufferManagerBase::createVertexBuffer( size_t vertexSize, size_t numVerts, HardwareBuffer::Usage usage, bool useShadowBuffer) { GLHardwareVertexBuffer* buf = new GLHardwareVertexBuffer(this, vertexSize, numVerts, usage, useShadowBuffer); { OGRE_LOCK_MUTEX(mVertexBuffersMutex) mVertexBuffers.insert(buf); } return HardwareVertexBufferSharedPtr(buf); } //----------------------------------------------------------------------- HardwareIndexBufferSharedPtr GLHardwareBufferManagerBase::createIndexBuffer( HardwareIndexBuffer::IndexType itype, size_t numIndexes, HardwareBuffer::Usage usage, bool useShadowBuffer) { GLHardwareIndexBuffer* buf = new GLHardwareIndexBuffer(this, itype, numIndexes, usage, useShadowBuffer); { OGRE_LOCK_MUTEX(mIndexBuffersMutex) mIndexBuffers.insert(buf); } return HardwareIndexBufferSharedPtr(buf); } //--------------------------------------------------------------------- RenderToVertexBufferSharedPtr GLHardwareBufferManagerBase::createRenderToVertexBuffer() { return RenderToVertexBufferSharedPtr(new GLRenderToVertexBuffer); } //--------------------------------------------------------------------- GLenum GLHardwareBufferManagerBase::getGLUsage(unsigned int usage) { switch(usage) { case HardwareBuffer::HBU_STATIC: case HardwareBuffer::HBU_STATIC_WRITE_ONLY: return GL_STATIC_DRAW_ARB; case HardwareBuffer::HBU_DYNAMIC: case HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY: return GL_DYNAMIC_DRAW_ARB; case HardwareBuffer::HBU_DYNAMIC_WRITE_ONLY_DISCARDABLE: return GL_STREAM_DRAW_ARB; default: return GL_DYNAMIC_DRAW_ARB; }; } //--------------------------------------------------------------------- GLenum GLHardwareBufferManagerBase::getGLType(unsigned int type) { switch(type) { case VET_FLOAT1: case VET_FLOAT2: case VET_FLOAT3: case VET_FLOAT4: return GL_FLOAT; case VET_SHORT1: case VET_SHORT2: case VET_SHORT3: case VET_SHORT4: return GL_SHORT; case VET_COLOUR: case VET_COLOUR_ABGR: case VET_COLOUR_ARGB: case VET_UBYTE4: return GL_UNSIGNED_BYTE; default: return 0; }; } //--------------------------------------------------------------------- //--------------------------------------------------------------------- void* GLHardwareBufferManagerBase::allocateScratch(uint32 size) { // simple forward link search based on alloc sizes // not that fast but the list should never get that long since not many // locks at once (hopefully) OGRE_LOCK_MUTEX(mScratchMutex) // Alignment - round up the size to 32 bits // control blocks are 32 bits too so this packs nicely if (size % 4 != 0) { size += 4 - (size % 4); } uint32 bufferPos = 0; while (bufferPos < SCRATCH_POOL_SIZE) { GLScratchBufferAlloc* pNext = (GLScratchBufferAlloc*)(mScratchBufferPool + bufferPos); // Big enough? if (pNext->free && pNext->size >= size) { // split? And enough space for control block if(pNext->size > size + sizeof(GLScratchBufferAlloc)) { uint32 offset = (uint32)sizeof(GLScratchBufferAlloc) + size; GLScratchBufferAlloc* pSplitAlloc = (GLScratchBufferAlloc*) (mScratchBufferPool + bufferPos + offset); pSplitAlloc->free = 1; // split size is remainder minus new control block pSplitAlloc->size = pNext->size - size - sizeof(GLScratchBufferAlloc); // New size of current pNext->size = size; } // allocate and return pNext->free = 0; // return pointer just after this control block (++ will do that for us) return ++pNext; } bufferPos += (uint32)sizeof(GLScratchBufferAlloc) + pNext->size; } // no available alloc return 0; } //--------------------------------------------------------------------- void GLHardwareBufferManagerBase::deallocateScratch(void* ptr) { OGRE_LOCK_MUTEX(mScratchMutex) // Simple linear search dealloc uint32 bufferPos = 0; GLScratchBufferAlloc* pLast = 0; while (bufferPos < SCRATCH_POOL_SIZE) { GLScratchBufferAlloc* pCurrent = (GLScratchBufferAlloc*)(mScratchBufferPool + bufferPos); // Pointers match? if ((mScratchBufferPool + bufferPos + sizeof(GLScratchBufferAlloc)) == ptr) { // dealloc pCurrent->free = 1; // merge with previous if (pLast && pLast->free) { // adjust buffer pos bufferPos -= (pLast->size + (uint32)sizeof(GLScratchBufferAlloc)); // merge free space pLast->size += pCurrent->size + sizeof(GLScratchBufferAlloc); pCurrent = pLast; } // merge with next uint32 offset = bufferPos + pCurrent->size + (uint32)sizeof(GLScratchBufferAlloc); if (offset < SCRATCH_POOL_SIZE) { GLScratchBufferAlloc* pNext = (GLScratchBufferAlloc*)( mScratchBufferPool + offset); if (pNext->free) { pCurrent->size += pNext->size + sizeof(GLScratchBufferAlloc); } } // done return; } bufferPos += (uint32)sizeof(GLScratchBufferAlloc) + pCurrent->size; pLast = pCurrent; } // Should never get here unless there's a corruption assert (false && "Memory deallocation error"); } //--------------------------------------------------------------------- const size_t GLHardwareBufferManagerBase::getGLMapBufferThreshold() const { return mMapBufferThreshold; } //--------------------------------------------------------------------- void GLHardwareBufferManagerBase::setGLMapBufferThreshold( const size_t value ) { mMapBufferThreshold = value; } }