/* ----------------------------------------------------------------------------- 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 "OgreStableHeaders.h" #include "OgreVertexIndexData.h" #include "OgreHardwareBufferManager.h" #include "OgreHardwareVertexBuffer.h" #include "OgreHardwareIndexBuffer.h" #include "OgreVector3.h" #include "OgreAxisAlignedBox.h" #include "OgreRoot.h" #include "OgreRenderSystem.h" #include "OgreException.h" namespace Ogre { //----------------------------------------------------------------------- VertexData::VertexData(HardwareBufferManagerBase* mgr) { mMgr = mgr ? mgr : HardwareBufferManager::getSingletonPtr(); vertexBufferBinding = mMgr->createVertexBufferBinding(); vertexDeclaration = mMgr->createVertexDeclaration(); mDeleteDclBinding = true; vertexCount = 0; vertexStart = 0; hwAnimDataItemsUsed = 0; } //--------------------------------------------------------------------- VertexData::VertexData(VertexDeclaration* dcl, VertexBufferBinding* bind) { // this is a fallback rather than actively used mMgr = HardwareBufferManager::getSingletonPtr(); vertexDeclaration = dcl; vertexBufferBinding = bind; mDeleteDclBinding = false; vertexCount = 0; vertexStart = 0; hwAnimDataItemsUsed = 0; } //----------------------------------------------------------------------- VertexData::~VertexData() { if (mDeleteDclBinding) { mMgr->destroyVertexBufferBinding(vertexBufferBinding); mMgr->destroyVertexDeclaration(vertexDeclaration); } } //----------------------------------------------------------------------- VertexData* VertexData::clone(bool copyData, HardwareBufferManagerBase* mgr) const { HardwareBufferManagerBase* pManager = mgr ? mgr : mMgr; VertexData* dest = OGRE_NEW VertexData(mgr); // Copy vertex buffers in turn const VertexBufferBinding::VertexBufferBindingMap& bindings = this->vertexBufferBinding->getBindings(); VertexBufferBinding::VertexBufferBindingMap::const_iterator vbi, vbend; vbend = bindings.end(); for (vbi = bindings.begin(); vbi != vbend; ++vbi) { HardwareVertexBufferSharedPtr srcbuf = vbi->second; HardwareVertexBufferSharedPtr dstBuf; if (copyData) { // create new buffer with the same settings dstBuf = pManager->createVertexBuffer( srcbuf->getVertexSize(), srcbuf->getNumVertices(), srcbuf->getUsage(), srcbuf->hasShadowBuffer()); // copy data dstBuf->copyData(*srcbuf, 0, 0, srcbuf->getSizeInBytes(), true); } else { // don't copy, point at existing buffer dstBuf = srcbuf; } // Copy binding dest->vertexBufferBinding->setBinding(vbi->first, dstBuf); } // Basic vertex info dest->vertexStart = this->vertexStart; dest->vertexCount = this->vertexCount; // Copy elements const VertexDeclaration::VertexElementList elems = this->vertexDeclaration->getElements(); VertexDeclaration::VertexElementList::const_iterator ei, eiend; eiend = elems.end(); for (ei = elems.begin(); ei != eiend; ++ei) { dest->vertexDeclaration->addElement( ei->getSource(), ei->getOffset(), ei->getType(), ei->getSemantic(), ei->getIndex() ); } // Copy reference to hardware shadow buffer, no matter whether copy data or not dest->hardwareShadowVolWBuffer = hardwareShadowVolWBuffer; // copy anim data dest->hwAnimationDataList = hwAnimationDataList; dest->hwAnimDataItemsUsed = hwAnimDataItemsUsed; return dest; } //----------------------------------------------------------------------- void VertexData::prepareForShadowVolume(void) { /* NOTE I would dearly, dearly love to just use a 4D position buffer in order to store the extra 'w' value I need to differentiate between extruded and non-extruded sections of the buffer, so that vertex programs could use that. Hey, it works fine for GL. However, D3D9 in it's infinite stupidity, does not support 4d position vertices in the fixed-function pipeline. If you use them, you just see nothing. Since we can't know whether the application is going to use fixed function or vertex programs, we have to stick to 3d position vertices and store the 'w' in a separate 1D texture coordinate buffer, which is only used when rendering the shadow. */ // Upfront, lets check whether we have vertex program capability RenderSystem* rend = Root::getSingleton().getRenderSystem(); bool useVertexPrograms = false; if (rend && rend->getCapabilities()->hasCapability(RSC_VERTEX_PROGRAM)) { useVertexPrograms = true; } // Look for a position element const VertexElement* posElem = vertexDeclaration->findElementBySemantic(VES_POSITION); if (posElem) { size_t v; unsigned short posOldSource = posElem->getSource(); HardwareVertexBufferSharedPtr vbuf = vertexBufferBinding->getBuffer(posOldSource); bool wasSharedBuffer = false; // Are there other elements in the buffer except for the position? if (vbuf->getVertexSize() > posElem->getSize()) { // We need to create another buffer to contain the remaining elements // Most drivers don't like gaps in the declaration, and in any case it's waste wasSharedBuffer = true; } HardwareVertexBufferSharedPtr newPosBuffer, newRemainderBuffer; if (wasSharedBuffer) { newRemainderBuffer = vbuf->getManager()->createVertexBuffer( vbuf->getVertexSize() - posElem->getSize(), vbuf->getNumVertices(), vbuf->getUsage(), vbuf->hasShadowBuffer()); } // Allocate new position buffer, will be FLOAT3 and 2x the size size_t oldVertexCount = vbuf->getNumVertices(); size_t newVertexCount = oldVertexCount * 2; newPosBuffer = vbuf->getManager()->createVertexBuffer( VertexElement::getTypeSize(VET_FLOAT3), newVertexCount, vbuf->getUsage(), vbuf->hasShadowBuffer()); // Iterate over the old buffer, copying the appropriate elements and initialising the rest float* pSrc; unsigned char *pBaseSrc = static_cast( vbuf->lock(HardwareBuffer::HBL_READ_ONLY)); // Point first destination pointer at the start of the new position buffer, // the other one half way along float *pDest = static_cast(newPosBuffer->lock(HardwareBuffer::HBL_DISCARD)); float* pDest2 = pDest + oldVertexCount * 3; // Precalculate any dimensions of vertex areas outside the position size_t prePosVertexSize = 0, postPosVertexSize, postPosVertexOffset; unsigned char *pBaseDestRem = 0; if (wasSharedBuffer) { pBaseDestRem = static_cast( newRemainderBuffer->lock(HardwareBuffer::HBL_DISCARD)); prePosVertexSize = posElem->getOffset(); postPosVertexOffset = prePosVertexSize + posElem->getSize(); postPosVertexSize = vbuf->getVertexSize() - postPosVertexOffset; // the 2 separate bits together should be the same size as the remainder buffer vertex assert (newRemainderBuffer->getVertexSize() == prePosVertexSize + postPosVertexSize); // Iterate over the vertices for (v = 0; v < oldVertexCount; ++v) { // Copy position, into both buffers posElem->baseVertexPointerToElement(pBaseSrc, &pSrc); *pDest++ = *pDest2++ = *pSrc++; *pDest++ = *pDest2++ = *pSrc++; *pDest++ = *pDest2++ = *pSrc++; // now deal with any other elements // Basically we just memcpy the vertex excluding the position if (prePosVertexSize > 0) memcpy(pBaseDestRem, pBaseSrc, prePosVertexSize); if (postPosVertexSize > 0) memcpy(pBaseDestRem + prePosVertexSize, pBaseSrc + postPosVertexOffset, postPosVertexSize); pBaseDestRem += newRemainderBuffer->getVertexSize(); pBaseSrc += vbuf->getVertexSize(); } // next vertex } else { // Unshared buffer, can block copy the whole thing memcpy(pDest, pBaseSrc, vbuf->getSizeInBytes()); memcpy(pDest2, pBaseSrc, vbuf->getSizeInBytes()); } vbuf->unlock(); newPosBuffer->unlock(); if (wasSharedBuffer) newRemainderBuffer->unlock(); // At this stage, he original vertex buffer is going to be destroyed // So we should force the deallocation of any temporary copies vbuf->getManager()->_forceReleaseBufferCopies(vbuf); if (useVertexPrograms) { // Now it's time to set up the w buffer hardwareShadowVolWBuffer = vbuf->getManager()->createVertexBuffer( sizeof(float), newVertexCount, HardwareBuffer::HBU_STATIC_WRITE_ONLY, false); // Fill the first half with 1.0, second half with 0.0 pDest = static_cast( hardwareShadowVolWBuffer->lock(HardwareBuffer::HBL_DISCARD)); for (v = 0; v < oldVertexCount; ++v) { *pDest++ = 1.0f; } for (v = 0; v < oldVertexCount; ++v) { *pDest++ = 0.0f; } hardwareShadowVolWBuffer->unlock(); } unsigned short newPosBufferSource; if (wasSharedBuffer) { // Get the a new buffer binding index newPosBufferSource= vertexBufferBinding->getNextIndex(); // Re-bind the old index to the remainder buffer vertexBufferBinding->setBinding(posOldSource, newRemainderBuffer); } else { // We can just re-use the same source idex for the new position buffer newPosBufferSource = posOldSource; } // Bind the new position buffer vertexBufferBinding->setBinding(newPosBufferSource, newPosBuffer); // Now, alter the vertex declaration to change the position source // and the offsets of elements using the same buffer VertexDeclaration::VertexElementList::const_iterator elemi = vertexDeclaration->getElements().begin(); VertexDeclaration::VertexElementList::const_iterator elemiend = vertexDeclaration->getElements().end(); unsigned short idx; for(idx = 0; elemi != elemiend; ++elemi, ++idx) { if (&(*elemi) == posElem) { // Modify position to point at new position buffer vertexDeclaration->modifyElement( idx, newPosBufferSource, // new source buffer 0, // no offset now VET_FLOAT3, VES_POSITION); } else if (wasSharedBuffer && elemi->getSource() == posOldSource && elemi->getOffset() > prePosVertexSize ) { // This element came after position, remove the position's // size vertexDeclaration->modifyElement( idx, posOldSource, // same old source elemi->getOffset() - posElem->getSize(), // less offset now elemi->getType(), elemi->getSemantic(), elemi->getIndex()); } } // Note that we don't change vertexCount, because the other buffer(s) are still the same // size after all } } //----------------------------------------------------------------------- void VertexData::reorganiseBuffers(VertexDeclaration* newDeclaration, const BufferUsageList& bufferUsages, HardwareBufferManagerBase* mgr) { HardwareBufferManagerBase* pManager = mgr ? mgr : mMgr; // Firstly, close up any gaps in the buffer sources which might have arisen newDeclaration->closeGapsInSource(); // Build up a list of both old and new elements in each buffer unsigned short buf = 0; vector::type oldBufferLocks; vector::type oldBufferVertexSizes; vector::type newBufferLocks; vector::type newBufferVertexSizes; VertexBufferBinding* newBinding = pManager->createVertexBufferBinding(); const VertexBufferBinding::VertexBufferBindingMap& oldBindingMap = vertexBufferBinding->getBindings(); VertexBufferBinding::VertexBufferBindingMap::const_iterator itBinding; // Pre-allocate old buffer locks if (!oldBindingMap.empty()) { size_t count = oldBindingMap.rbegin()->first + 1; oldBufferLocks.resize(count); oldBufferVertexSizes.resize(count); } // Lock all the old buffers for reading for (itBinding = oldBindingMap.begin(); itBinding != oldBindingMap.end(); ++itBinding) { assert(itBinding->second->getNumVertices() >= vertexCount); oldBufferVertexSizes[itBinding->first] = itBinding->second->getVertexSize(); oldBufferLocks[itBinding->first] = itBinding->second->lock( HardwareBuffer::HBL_READ_ONLY); } // Create new buffers and lock all for writing buf = 0; while (!newDeclaration->findElementsBySource(buf).empty()) { size_t vertexSize = newDeclaration->getVertexSize(buf); HardwareVertexBufferSharedPtr vbuf = pManager->createVertexBuffer( vertexSize, vertexCount, bufferUsages[buf]); newBinding->setBinding(buf, vbuf); newBufferVertexSizes.push_back(vertexSize); newBufferLocks.push_back( vbuf->lock(HardwareBuffer::HBL_DISCARD)); buf++; } // Map from new to old elements typedef map::type NewToOldElementMap; NewToOldElementMap newToOldElementMap; const VertexDeclaration::VertexElementList& newElemList = newDeclaration->getElements(); VertexDeclaration::VertexElementList::const_iterator ei, eiend; eiend = newElemList.end(); for (ei = newElemList.begin(); ei != eiend; ++ei) { // Find corresponding old element const VertexElement* oldElem = vertexDeclaration->findElementBySemantic( (*ei).getSemantic(), (*ei).getIndex()); if (!oldElem) { // Error, cannot create new elements with this method OGRE_EXCEPT(Exception::ERR_ITEM_NOT_FOUND, "Element not found in old vertex declaration", "VertexData::reorganiseBuffers"); } newToOldElementMap[&(*ei)] = oldElem; } // Now iterate over the new buffers, pulling data out of the old ones // For each vertex for (size_t v = 0; v < vertexCount; ++v) { // For each (new) element for (ei = newElemList.begin(); ei != eiend; ++ei) { const VertexElement* newElem = &(*ei); NewToOldElementMap::iterator noi = newToOldElementMap.find(newElem); const VertexElement* oldElem = noi->second; unsigned short oldBufferNo = oldElem->getSource(); unsigned short newBufferNo = newElem->getSource(); void* pSrcBase = static_cast( static_cast(oldBufferLocks[oldBufferNo]) + v * oldBufferVertexSizes[oldBufferNo]); void* pDstBase = static_cast( static_cast(newBufferLocks[newBufferNo]) + v * newBufferVertexSizes[newBufferNo]); void *pSrc, *pDst; oldElem->baseVertexPointerToElement(pSrcBase, &pSrc); newElem->baseVertexPointerToElement(pDstBase, &pDst); memcpy(pDst, pSrc, newElem->getSize()); } } // Unlock all buffers for (itBinding = oldBindingMap.begin(); itBinding != oldBindingMap.end(); ++itBinding) { itBinding->second->unlock(); } for (buf = 0; buf < newBinding->getBufferCount(); ++buf) { newBinding->getBuffer(buf)->unlock(); } // Delete old binding & declaration if (mDeleteDclBinding) { pManager->destroyVertexBufferBinding(vertexBufferBinding); pManager->destroyVertexDeclaration(vertexDeclaration); } // Assign new binding and declaration vertexDeclaration = newDeclaration; vertexBufferBinding = newBinding; // after this is complete, new manager should be used mMgr = pManager; mDeleteDclBinding = true; // because we created these through a manager } //----------------------------------------------------------------------- void VertexData::reorganiseBuffers(VertexDeclaration* newDeclaration, HardwareBufferManagerBase* mgr) { // Derive the buffer usages from looking at where the source has come // from BufferUsageList usages; for (unsigned short b = 0; b <= newDeclaration->getMaxSource(); ++b) { VertexDeclaration::VertexElementList destElems = newDeclaration->findElementsBySource(b); // Initialise with most restrictive version // (not really a usable option, but these flags will be removed) HardwareBuffer::Usage final = static_cast( HardwareBuffer::HBU_STATIC_WRITE_ONLY | HardwareBuffer::HBU_DISCARDABLE); VertexDeclaration::VertexElementList::iterator v; for (v = destElems.begin(); v != destElems.end(); ++v) { VertexElement& destelem = *v; // get source const VertexElement* srcelem = vertexDeclaration->findElementBySemantic( destelem.getSemantic(), destelem.getIndex()); // get buffer HardwareVertexBufferSharedPtr srcbuf = vertexBufferBinding->getBuffer(srcelem->getSource()); // improve flexibility only if (srcbuf->getUsage() & HardwareBuffer::HBU_DYNAMIC) { // remove static final = static_cast( final & ~HardwareBuffer::HBU_STATIC); // add dynamic final = static_cast( final | HardwareBuffer::HBU_DYNAMIC); } if (!(srcbuf->getUsage() & HardwareBuffer::HBU_WRITE_ONLY)) { // remove write only final = static_cast( final & ~HardwareBuffer::HBU_WRITE_ONLY); } if (!(srcbuf->getUsage() & HardwareBuffer::HBU_DISCARDABLE)) { // remove discardable final = static_cast( final & ~HardwareBuffer::HBU_DISCARDABLE); } } usages.push_back(final); } // Call specific method reorganiseBuffers(newDeclaration, usages, mgr); } //----------------------------------------------------------------------- void VertexData::closeGapsInBindings(void) { if (!vertexBufferBinding->hasGaps()) return; // Check for error first const VertexDeclaration::VertexElementList& allelems = vertexDeclaration->getElements(); VertexDeclaration::VertexElementList::const_iterator ai; for (ai = allelems.begin(); ai != allelems.end(); ++ai) { const VertexElement& elem = *ai; if (!vertexBufferBinding->isBufferBound(elem.getSource())) { OGRE_EXCEPT(Exception::ERR_ITEM_NOT_FOUND, "No buffer is bound to that element source.", "VertexData::closeGapsInBindings"); } } // Close gaps in the vertex buffer bindings VertexBufferBinding::BindingIndexMap bindingIndexMap; vertexBufferBinding->closeGaps(bindingIndexMap); // Modify vertex elements to reference to new buffer index unsigned short elemIndex = 0; for (ai = allelems.begin(); ai != allelems.end(); ++ai, ++elemIndex) { const VertexElement& elem = *ai; VertexBufferBinding::BindingIndexMap::const_iterator it = bindingIndexMap.find(elem.getSource()); assert(it != bindingIndexMap.end()); ushort targetSource = it->second; if (elem.getSource() != targetSource) { vertexDeclaration->modifyElement(elemIndex, targetSource, elem.getOffset(), elem.getType(), elem.getSemantic(), elem.getIndex()); } } } //----------------------------------------------------------------------- void VertexData::removeUnusedBuffers(void) { set::type usedBuffers; // Collect used buffers const VertexDeclaration::VertexElementList& allelems = vertexDeclaration->getElements(); VertexDeclaration::VertexElementList::const_iterator ai; for (ai = allelems.begin(); ai != allelems.end(); ++ai) { const VertexElement& elem = *ai; usedBuffers.insert(elem.getSource()); } // Unset unused buffer bindings ushort count = vertexBufferBinding->getLastBoundIndex(); for (ushort index = 0; index < count; ++index) { if (usedBuffers.find(index) == usedBuffers.end() && vertexBufferBinding->isBufferBound(index)) { vertexBufferBinding->unsetBinding(index); } } // Close gaps closeGapsInBindings(); } //----------------------------------------------------------------------- void VertexData::convertPackedColour( VertexElementType srcType, VertexElementType destType) { if (destType != VET_COLOUR_ABGR && destType != VET_COLOUR_ARGB) { OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Invalid destType parameter", "VertexData::convertPackedColour"); } if (srcType != VET_COLOUR_ABGR && srcType != VET_COLOUR_ARGB) { OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS, "Invalid srcType parameter", "VertexData::convertPackedColour"); } const VertexBufferBinding::VertexBufferBindingMap& bindMap = vertexBufferBinding->getBindings(); VertexBufferBinding::VertexBufferBindingMap::const_iterator bindi; for (bindi = bindMap.begin(); bindi != bindMap.end(); ++bindi) { VertexDeclaration::VertexElementList elems = vertexDeclaration->findElementsBySource(bindi->first); bool conversionNeeded = false; VertexDeclaration::VertexElementList::iterator elemi; for (elemi = elems.begin(); elemi != elems.end(); ++elemi) { VertexElement& elem = *elemi; if (elem.getType() == VET_COLOUR || ((elem.getType() == VET_COLOUR_ABGR || elem.getType() == VET_COLOUR_ARGB) && elem.getType() != destType)) { conversionNeeded = true; } } if (conversionNeeded) { void* pBase = bindi->second->lock(HardwareBuffer::HBL_NORMAL); for (size_t v = 0; v < bindi->second->getNumVertices(); ++v) { for (elemi = elems.begin(); elemi != elems.end(); ++elemi) { VertexElement& elem = *elemi; VertexElementType currType = (elem.getType() == VET_COLOUR) ? srcType : elem.getType(); if (elem.getType() == VET_COLOUR || ((elem.getType() == VET_COLOUR_ABGR || elem.getType() == VET_COLOUR_ARGB) && elem.getType() != destType)) { uint32* pRGBA; elem.baseVertexPointerToElement(pBase, &pRGBA); VertexElement::convertColourValue(currType, destType, pRGBA); } } pBase = static_cast( static_cast(pBase) + bindi->second->getVertexSize()); } bindi->second->unlock(); // Modify the elements to reflect the changed type const VertexDeclaration::VertexElementList& allelems = vertexDeclaration->getElements(); VertexDeclaration::VertexElementList::const_iterator ai; unsigned short elemIndex = 0; for (ai = allelems.begin(); ai != allelems.end(); ++ai, ++elemIndex) { const VertexElement& elem = *ai; if (elem.getType() == VET_COLOUR || ((elem.getType() == VET_COLOUR_ABGR || elem.getType() == VET_COLOUR_ARGB) && elem.getType() != destType)) { vertexDeclaration->modifyElement(elemIndex, elem.getSource(), elem.getOffset(), destType, elem.getSemantic(), elem.getIndex()); } } } } // each buffer } //----------------------------------------------------------------------- ushort VertexData::allocateHardwareAnimationElements(ushort count, bool animateNormals) { // Find first free texture coord set unsigned short texCoord = vertexDeclaration->getNextFreeTextureCoordinate(); unsigned short freeCount = (ushort)(OGRE_MAX_TEXTURE_COORD_SETS - texCoord); if (animateNormals) // we need 2x the texture coords, round down freeCount /= 2; unsigned short supportedCount = std::min(freeCount, count); // Increase to correct size for (size_t c = hwAnimationDataList.size(); c < supportedCount; ++c) { // Create a new 3D texture coordinate set HardwareAnimationData data; data.targetBufferIndex = vertexBufferBinding->getNextIndex(); vertexDeclaration->addElement(data.targetBufferIndex, 0, VET_FLOAT3, VES_TEXTURE_COORDINATES, texCoord++); if (animateNormals) vertexDeclaration->addElement(data.targetBufferIndex, sizeof(float)*3, VET_FLOAT3, VES_TEXTURE_COORDINATES, texCoord++); hwAnimationDataList.push_back(data); // Vertex buffer will not be bound yet, we expect this to be done by the // caller when it becomes appropriate (e.g. through a VertexAnimationTrack) } return supportedCount; } //----------------------------------------------------------------------- //----------------------------------------------------------------------- IndexData::IndexData() { indexCount = 0; indexStart = 0; } //----------------------------------------------------------------------- IndexData::~IndexData() { } //----------------------------------------------------------------------- IndexData* IndexData::clone(bool copyData, HardwareBufferManagerBase* mgr) const { HardwareBufferManagerBase* pManager = mgr ? mgr : HardwareBufferManager::getSingletonPtr(); IndexData* dest = OGRE_NEW IndexData(); if (indexBuffer.get()) { if (copyData) { dest->indexBuffer = pManager->createIndexBuffer(indexBuffer->getType(), indexBuffer->getNumIndexes(), indexBuffer->getUsage(), indexBuffer->hasShadowBuffer()); dest->indexBuffer->copyData(*indexBuffer, 0, 0, indexBuffer->getSizeInBytes(), true); } else { dest->indexBuffer = indexBuffer; } } dest->indexCount = indexCount; dest->indexStart = indexStart; return dest; } //----------------------------------------------------------------------- //----------------------------------------------------------------------- // Local Utility class for vertex cache optimizer class Triangle { public: enum EdgeMatchType { AB, BC, CA, ANY, NONE }; uint32 a, b, c; inline Triangle() { } inline Triangle( uint32 ta, uint32 tb, uint32 tc ) : a( ta ), b( tb ), c( tc ) { } inline Triangle( uint32 t[3] ) : a( t[0] ), b( t[1] ), c( t[2] ) { } inline Triangle( const Triangle& t ) : a( t.a ), b( t.b ), c( t.c ) { } inline bool sharesEdge(const Triangle& t) const { return( a == t.a && b == t.c || a == t.b && b == t.a || a == t.c && b == t.b || b == t.a && c == t.c || b == t.b && c == t.a || b == t.c && c == t.b || c == t.a && a == t.c || c == t.b && a == t.a || c == t.c && a == t.b ); } inline bool sharesEdge(const uint32 ea, const uint32 eb, const Triangle& t) const { return( ea == t.a && eb == t.c || ea == t.b && eb == t.a || ea == t.c && eb == t.b ); } inline bool sharesEdge(const EdgeMatchType edge, const Triangle& t) const { if (edge == AB) return sharesEdge(a, b, t); else if (edge == BC) return sharesEdge(b, c, t); else if (edge == CA) return sharesEdge(c, a, t); else return (edge == ANY) == sharesEdge(t); } inline EdgeMatchType endoSharedEdge(const Triangle& t) const { if (sharesEdge(a, b, t)) return AB; if (sharesEdge(b, c, t)) return BC; if (sharesEdge(c, a, t)) return CA; return NONE; } inline EdgeMatchType exoSharedEdge(const Triangle& t) const { return t.endoSharedEdge(*this); } inline void shiftClockwise() { uint32 t = a; a = c; c = b; b = t; } inline void shiftCounterClockwise() { uint32 t = a; a = b; b = c; c = t; } }; //----------------------------------------------------------------------- //----------------------------------------------------------------------- void IndexData::optimiseVertexCacheTriList(void) { if (indexBuffer->isLocked()) return; void *buffer = indexBuffer->lock(HardwareBuffer::HBL_NORMAL); Triangle* triangles; uint32 *dest; size_t nIndexes = indexCount; size_t nTriangles = nIndexes / 3; size_t i, j; uint16 *source = 0; if (indexBuffer->getType() == HardwareIndexBuffer::IT_16BIT) { triangles = OGRE_ALLOC_T(Triangle, nTriangles, MEMCATEGORY_GEOMETRY); source = (uint16 *)buffer; dest = (uint32 *)triangles; for (i = 0; i < nIndexes; ++i) dest[i] = source[i]; } else triangles = (Triangle*)buffer; // sort triangles based on shared edges uint32 *destlist = OGRE_ALLOC_T(uint32, nTriangles, MEMCATEGORY_GEOMETRY); unsigned char *visited = OGRE_ALLOC_T(unsigned char, nTriangles, MEMCATEGORY_GEOMETRY); for (i = 0; i < nTriangles; ++i) visited[i] = 0; uint32 start = 0, ti = 0, destcount = 0; bool found = false; for (i = 0; i < nTriangles; ++i) { if (found) found = false; else { while (visited[start++]); ti = start - 1; } destlist[destcount++] = ti; visited[ti] = 1; for (j = start; j < nTriangles; ++j) { if (visited[j]) continue; if (triangles[ti].sharesEdge(triangles[j])) { found = true; ti = static_cast(j); break; } } } if (indexBuffer->getType() == HardwareIndexBuffer::IT_16BIT) { // reorder the indexbuffer j = 0; for (i = 0; i < nTriangles; ++i) { Triangle *t = &triangles[destlist[i]]; source[j++] = (uint16)t->a; source[j++] = (uint16)t->b; source[j++] = (uint16)t->c; } OGRE_FREE(triangles, MEMCATEGORY_GEOMETRY); } else { uint32 *reflist = OGRE_ALLOC_T(uint32, nTriangles, MEMCATEGORY_GEOMETRY); // fill the referencebuffer for (i = 0; i < nTriangles; ++i) reflist[destlist[i]] = static_cast(i); // reorder the indexbuffer for (i = 0; i < nTriangles; ++i) { j = destlist[i]; if (i == j) continue; // do not move triangle // swap triangles Triangle t = triangles[i]; triangles[i] = triangles[j]; triangles[j] = t; // change reference destlist[reflist[i]] = static_cast(j); // destlist[i] = i; // not needed, it will not be used } OGRE_FREE(reflist, MEMCATEGORY_GEOMETRY); } OGRE_FREE(destlist, MEMCATEGORY_GEOMETRY); OGRE_FREE(visited, MEMCATEGORY_GEOMETRY); indexBuffer->unlock(); } //----------------------------------------------------------------------- //----------------------------------------------------------------------- void VertexCacheProfiler::profile(const HardwareIndexBufferSharedPtr& indexBuffer) { if (indexBuffer->isLocked()) return; uint16 *shortbuffer = (uint16 *)indexBuffer->lock(HardwareBuffer::HBL_READ_ONLY); if (indexBuffer->getType() == HardwareIndexBuffer::IT_16BIT) for (unsigned int i = 0; i < indexBuffer->getNumIndexes(); ++i) inCache(shortbuffer[i]); else { uint32 *buffer = (uint32 *)shortbuffer; for (unsigned int i = 0; i < indexBuffer->getNumIndexes(); ++i) inCache(buffer[i]); } indexBuffer->unlock(); } //----------------------------------------------------------------------- bool VertexCacheProfiler::inCache(unsigned int index) { for (unsigned int i = 0; i < buffersize; ++i) { if (index == cache[i]) { hit++; return true; } } miss++; cache[tail++] = index; tail %= size; if (buffersize < size) buffersize++; return false; } }