From 4dabd9c0472deb49573fdafef2fa413e59703f19 Mon Sep 17 00:00:00 2001
From: Steven Bennetts <steve@lindenlab.com>
Date: Fri, 2 Mar 2007 21:25:50 +0000
Subject: merge release@58699 beta-1-14-0@58707 -> release

---
 indra/llrender/llvertexbuffer.cpp | 918 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 918 insertions(+)
 create mode 100644 indra/llrender/llvertexbuffer.cpp

(limited to 'indra/llrender/llvertexbuffer.cpp')

diff --git a/indra/llrender/llvertexbuffer.cpp b/indra/llrender/llvertexbuffer.cpp
new file mode 100644
index 0000000000..d6477d69ec
--- /dev/null
+++ b/indra/llrender/llvertexbuffer.cpp
@@ -0,0 +1,918 @@
+#include "linden_common.h"
+
+#include "llvertexbuffer.h"
+// #include "llrender.h"
+#include "llglheaders.h"
+#include "llmemory.h"
+#include "llmemtype.h"
+
+//============================================================================
+
+//static
+S32 LLVertexBuffer::sCount = 0;
+S32 LLVertexBuffer::sGLCount = 0;
+BOOL LLVertexBuffer::sEnableVBOs = TRUE;
+S32 LLVertexBuffer::sGLRenderBuffer = 0;
+S32 LLVertexBuffer::sGLRenderIndices = 0;
+U32 LLVertexBuffer::sLastMask = 0;
+BOOL LLVertexBuffer::sVBOActive = FALSE;
+BOOL LLVertexBuffer::sIBOActive = FALSE;
+U32 LLVertexBuffer::sAllocatedBytes = 0;
+BOOL LLVertexBuffer::sRenderActive = FALSE;
+
+std::vector<U32> LLVertexBuffer::sDeleteList;
+LLVertexBuffer::buffer_list_t LLVertexBuffer::sLockedList;
+
+S32 LLVertexBuffer::sTypeOffsets[LLVertexBuffer::TYPE_MAX] =
+{
+	sizeof(LLVector3), // TYPE_VERTEX,
+	sizeof(LLVector3), // TYPE_NORMAL,
+	sizeof(LLVector2), // TYPE_TEXCOORD,
+	sizeof(LLVector2), // TYPE_TEXCOORD2,
+	sizeof(LLColor4U), // TYPE_COLOR,
+	sizeof(LLVector3), // TYPE_BINORMAL,
+	sizeof(F32),	   // TYPE_WEIGHT,
+	sizeof(LLVector4), // TYPE_CLOTHWEIGHT,
+};
+
+//static
+void LLVertexBuffer::initClass(bool use_vbo)
+{
+	sEnableVBOs = use_vbo;
+}
+
+//static 
+void LLVertexBuffer::unbind()
+{
+	if (sVBOActive)
+	{
+		glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
+		sVBOActive = FALSE;
+	}
+	if (sIBOActive)
+	{
+		glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
+		sIBOActive = FALSE;
+	}
+
+	sGLRenderBuffer = 0;
+	sGLRenderIndices = 0;
+}
+
+//static
+void LLVertexBuffer::cleanupClass()
+{
+	LLMemType mt(LLMemType::MTYPE_VERTEX_DATA);
+	sLockedList.clear();
+	startRender(); 
+	stopRender();
+	clientCopy(); // deletes GL buffers
+}
+
+//static, call before rendering VBOs
+void LLVertexBuffer::startRender()
+{		
+	LLMemType mt(LLMemType::MTYPE_VERTEX_DATA);
+	if (sEnableVBOs)
+	{
+		glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
+		glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
+		sVBOActive = FALSE;
+		sIBOActive = FALSE;
+	}
+	
+	sRenderActive = TRUE;
+	sGLRenderBuffer = 0;
+	sGLRenderIndices = 0;
+	sLastMask = 0;
+}
+
+void LLVertexBuffer::stopRender()
+{
+	sRenderActive = FALSE;
+}
+
+void LLVertexBuffer::clientCopy()
+{
+	if (!sDeleteList.empty())
+	{
+		size_t num = sDeleteList.size();
+		glDeleteBuffersARB(sDeleteList.size(), (GLuint*) &(sDeleteList[0]));
+		sDeleteList.clear();
+		sGLCount -= num;
+	}
+
+	if (sEnableVBOs)
+	{
+		LLTimer timer;
+		BOOL reset = TRUE;
+		buffer_list_t::iterator iter = sLockedList.begin();
+		while(iter != sLockedList.end())
+		{
+			LLVertexBuffer* buffer = *iter;
+			if (buffer->isLocked() && buffer->useVBOs())
+			{
+				buffer->setBuffer(0);
+			}
+			++iter;
+			if (reset)
+			{
+				reset = FALSE;
+				timer.reset(); //skip first copy (don't count pipeline stall)
+			}
+			else
+			{
+				if (timer.getElapsedTimeF64() > 0.005)
+				{
+					break;
+				}
+			}
+
+		}
+
+		sLockedList.erase(sLockedList.begin(), iter);
+	}
+}
+
+//----------------------------------------------------------------------------
+
+// For debugging
+struct VTNC /// Simple
+{
+	F32 v1,v2,v3;
+	F32 n1,n2,n3;
+	F32 t1,t2;
+	U32 c;
+};
+static VTNC dbg_vtnc;
+
+struct VTUNCB // Simple + Bump
+{
+	F32 v1,v2,v3;
+	F32 n1,n2,n3;
+	F32 t1,t2;
+	F32 u1,u2;
+	F32 b1,b2,b3;
+	U32 c;
+};
+static VTUNCB dbg_vtuncb;
+
+struct VTUNC // Surfacepatch
+{
+	F32 v1,v2,v3;
+	F32 n1,n2,n3;
+	F32 t1,t2;
+	F32 u1,u2;
+	U32 c;
+};
+static VTUNC dbg_vtunc;
+
+struct VTNW /// Avatar
+{
+	F32 v1,v2,v3;
+	F32 n1,n2,n3;
+	F32 t1,t2;
+	F32 w;
+};
+static VTNW dbg_vtnw;
+
+struct VTNPAD /// Avatar Output
+{
+	F32 v1,v2,v3,p1;
+	F32 n1,n2,n3,p2;
+	F32 t1,t2,p3,p4;
+};
+static VTNPAD dbg_vtnpad;
+
+//----------------------------------------------------------------------------
+
+LLVertexBuffer::LLVertexBuffer(U32 typemask, S32 usage) :
+	LLRefCount(),
+	mNumVerts(0), mNumIndices(0), mUsage(usage), mGLBuffer(0), mGLIndices(0), 
+	mMappedData(NULL),
+	mMappedIndexData(NULL), mLocked(FALSE),
+	mResized(FALSE), mEmpty(TRUE), mFinal(FALSE), mFilthy(FALSE)
+{
+	LLMemType mt(LLMemType::MTYPE_VERTEX_DATA);
+	if (!sEnableVBOs)
+	{
+		mUsage = GL_STREAM_DRAW_ARB;
+	}
+	
+	S32 stride = 0;
+	for (S32 i=0; i<TYPE_MAX; i++)
+	{
+		U32 mask = 1<<i;
+		if (typemask & mask)
+		{
+			mOffsets[i] = stride;
+			stride += sTypeOffsets[i];
+		}
+	}
+	mTypeMask = typemask;
+	mStride = stride;
+	sCount++;
+}
+
+// protected, use unref()
+//virtual
+LLVertexBuffer::~LLVertexBuffer()
+{
+	LLMemType mt(LLMemType::MTYPE_VERTEX_DATA);
+	destroyGLBuffer();
+	destroyGLIndices();
+	sCount--;
+	
+	if (mLocked)
+	{
+		//pull off of locked list
+		for (buffer_list_t::iterator i = sLockedList.begin(); i != sLockedList.end(); ++i)
+		{
+			if (*i == this)
+			{
+				sLockedList.erase(i);
+				break;
+			}
+		}
+	}
+};
+
+//----------------------------------------------------------------------------
+
+void LLVertexBuffer::createGLBuffer()
+{
+	LLMemType mt(LLMemType::MTYPE_VERTEX_DATA);
+
+	U32 size = getSize();
+	if (mGLBuffer)
+	{
+		destroyGLBuffer();
+	}
+
+	if (size == 0)
+	{
+		return;
+	}
+
+	mMappedData = new U8[size];
+	memset(mMappedData, 0, size);
+	mEmpty = TRUE;
+
+	if (useVBOs())
+	{
+		glGenBuffersARB(1, (GLuint*) &mGLBuffer);
+		mResized = TRUE;
+		sGLCount++;
+	}
+	else
+	{
+		static int gl_buffer_idx = 0;
+		mGLBuffer = ++gl_buffer_idx;
+	}
+}
+
+void LLVertexBuffer::createGLIndices()
+{
+	LLMemType mt(LLMemType::MTYPE_VERTEX_DATA);
+	U32 size = getIndicesSize();
+
+	if (mGLIndices)
+	{
+		destroyGLIndices();
+	}
+	
+	if (size == 0)
+	{
+		return;
+	}
+
+	mMappedIndexData = new U8[size];
+	memset(mMappedIndexData, 0, size);
+	mEmpty = TRUE;
+
+	if (useVBOs())
+	{
+		glGenBuffersARB(1, (GLuint*) &mGLIndices);
+		mResized = TRUE;
+		sGLCount++;
+	}
+	else
+	{
+		static int gl_buffer_idx = 0;
+		mGLIndices = ++gl_buffer_idx;
+	}
+}
+
+void LLVertexBuffer::destroyGLBuffer()
+{
+	LLMemType mt(LLMemType::MTYPE_VERTEX_DATA);
+	if (mGLBuffer)
+	{
+		if (useVBOs())
+		{
+			sDeleteList.push_back(mGLBuffer);
+		}
+		
+		delete [] mMappedData;
+		mMappedData = NULL;
+		mEmpty = TRUE;
+		sAllocatedBytes -= getSize();
+	}
+	
+	mGLBuffer = 0;
+}
+
+void LLVertexBuffer::destroyGLIndices()
+{
+	LLMemType mt(LLMemType::MTYPE_VERTEX_DATA);
+	if (mGLIndices)
+	{
+		if (useVBOs())
+		{
+			sDeleteList.push_back(mGLIndices);
+		}
+		
+		delete [] mMappedIndexData;
+		mMappedIndexData = NULL;
+		mEmpty = TRUE;
+		sAllocatedBytes -= getIndicesSize();
+	}
+
+	mGLIndices = 0;
+}
+
+void LLVertexBuffer::updateNumVerts(S32 nverts)
+{
+	LLMemType mt(LLMemType::MTYPE_VERTEX_DATA);
+	if (!mDynamicSize)
+	{
+		mNumVerts = nverts;
+	}
+	else if (mUsage == GL_STATIC_DRAW_ARB ||
+		nverts > mNumVerts ||
+		nverts < mNumVerts/2)
+	{
+		if (mUsage != GL_STATIC_DRAW_ARB)
+		{
+			nverts += nverts/4;
+		}
+
+		mNumVerts = nverts;
+	}
+}
+
+void LLVertexBuffer::updateNumIndices(S32 nindices)
+{
+	LLMemType mt(LLMemType::MTYPE_VERTEX_DATA);
+	if (!mDynamicSize)
+	{
+		mNumIndices = nindices;
+	}
+	else if (mUsage == GL_STATIC_DRAW_ARB ||
+		nindices > mNumIndices ||
+		nindices < mNumIndices/2)
+	{
+		if (mUsage != GL_STATIC_DRAW_ARB)
+		{
+			nindices += nindices/4;
+		}
+
+		mNumIndices = nindices;
+	}
+}
+
+void LLVertexBuffer::makeStatic()
+{
+	if (!sEnableVBOs)
+	{
+		return;
+	}
+	
+	if (sRenderActive)
+	{
+		llerrs << "Make static called during render." << llendl;
+	}
+	
+	if (mUsage != GL_STATIC_DRAW_ARB)
+	{
+		if (useVBOs())
+		{
+			if (mGLBuffer)
+			{
+				sDeleteList.push_back(mGLBuffer);
+			}
+			if (mGLIndices)
+			{
+				sDeleteList.push_back(mGLIndices);
+			}
+		}
+	
+		if (mGLBuffer)
+		{
+			sGLCount++;
+			glGenBuffersARB(1, (GLuint*) &mGLBuffer);
+		}
+		if (mGLIndices)
+		{
+			sGLCount++;
+			glGenBuffersARB(1, (GLuint*) &mGLIndices);
+		}
+			
+		mUsage = GL_STATIC_DRAW_ARB;
+		mResized = TRUE;
+
+		if (!mLocked)
+		{
+			mLocked = TRUE;
+			sLockedList.push_back(this);
+		}
+	}
+}
+
+void LLVertexBuffer::allocateBuffer(S32 nverts, S32 nindices, bool create)
+{
+	LLMemType mt(LLMemType::MTYPE_VERTEX_DATA);
+		
+	updateNumVerts(nverts);
+	updateNumIndices(nindices);
+	
+	if (mMappedData)
+	{
+		llerrs << "LLVertexBuffer::allocateBuffer() called redundantly." << llendl;
+	}
+	if (create && (nverts || nindices))
+	{
+		createGLBuffer();
+		createGLIndices();
+	}
+	
+	sAllocatedBytes += getSize() + getIndicesSize();
+}
+
+void LLVertexBuffer::resizeBuffer(S32 newnverts, S32 newnindices)
+{
+	LLMemType mt(LLMemType::MTYPE_VERTEX_DATA);
+	mDynamicSize = TRUE;
+	if (mUsage == GL_STATIC_DRAW_ARB)
+	{ //always delete/allocate static buffers on resize
+		destroyGLBuffer();
+		destroyGLIndices();
+		allocateBuffer(newnverts, newnindices, TRUE);
+		mFinal = FALSE;
+	}
+	else if (newnverts > mNumVerts || newnindices > mNumIndices ||
+			 newnverts < mNumVerts/2 || newnindices < mNumIndices/2)
+	{
+		sAllocatedBytes -= getSize() + getIndicesSize();
+		
+		S32 oldsize = getSize();
+		S32 old_index_size = getIndicesSize();
+
+		updateNumVerts(newnverts);		
+		updateNumIndices(newnindices);
+		
+		S32 newsize = getSize();
+		S32 new_index_size = getIndicesSize();
+
+		sAllocatedBytes += newsize + new_index_size;
+
+		if (newsize)
+		{
+			if (!mGLBuffer)
+			{ //no buffer exists, create a new one
+				createGLBuffer();
+			}
+			else
+			{
+				//delete old buffer, keep GL buffer for now
+				U8* old = mMappedData;
+				mMappedData = new U8[newsize];
+				if (old)
+				{	
+					memcpy(mMappedData, old, llmin(newsize, oldsize));
+					if (newsize > oldsize)
+					{
+						memset(mMappedData+oldsize, 0, newsize-oldsize);
+					}
+
+					delete [] old;
+				}
+				else
+				{
+					memset(mMappedData, 0, newsize);
+					mEmpty = TRUE;
+				}
+				mResized = TRUE;
+			}
+		}
+		else if (mGLBuffer)
+		{
+			destroyGLBuffer();
+		}
+		
+		if (new_index_size)
+		{
+			if (!mGLIndices)
+			{
+				createGLIndices();
+			}
+			else
+			{
+				//delete old buffer, keep GL buffer for now
+				U8* old = mMappedIndexData;
+				mMappedIndexData = new U8[new_index_size];
+				if (old)
+				{	
+					memcpy(mMappedIndexData, old, llmin(new_index_size, old_index_size));
+					if (new_index_size > old_index_size)
+					{
+						memset(mMappedIndexData+old_index_size, 0, new_index_size - old_index_size);
+					}
+					delete [] old;
+				}
+				else
+				{
+					memset(mMappedIndexData, 0, new_index_size);
+					mEmpty = TRUE;
+				}
+				mResized = TRUE;
+			}
+		}
+		else if (mGLIndices)
+		{
+			destroyGLIndices();
+		}
+	}
+}
+
+BOOL LLVertexBuffer::useVBOs() const
+{
+	//it's generally ineffective to use VBO for things that are streaming
+	//when we already have a client buffer around
+	if (mUsage == GL_STREAM_DRAW_ARB)
+	{
+		return FALSE;
+	}
+
+	return sEnableVBOs && (!sRenderActive || !mLocked);
+}
+
+//----------------------------------------------------------------------------
+
+// Map for data access
+U8* LLVertexBuffer::mapBuffer(S32 access)
+{
+	LLMemType mt(LLMemType::MTYPE_VERTEX_DATA);
+	if (sRenderActive)
+	{
+		llwarns << "Buffer mapped during render frame!" << llendl;
+	}
+	if (!mGLBuffer && !mGLIndices)
+	{
+		llerrs << "LLVertexBuffer::mapBuffer() called  before createGLBuffer" << llendl;
+	}
+	if (mFinal)
+	{
+		llerrs << "LLVertexBuffer::mapBuffer() called on a finalized buffer." << llendl;
+	}
+	if (!mMappedData && !mMappedIndexData)
+	{
+		llerrs << "LLVertexBuffer::mapBuffer() called on unallocated buffer." << llendl;
+	}
+	
+	if (!mLocked && useVBOs())
+	{
+		mLocked = TRUE;
+		sLockedList.push_back(this);
+	}
+	
+	return mMappedData;
+}
+
+void LLVertexBuffer::unmapBuffer()
+{
+	LLMemType mt(LLMemType::MTYPE_VERTEX_DATA);
+	if (mMappedData || mMappedIndexData)
+	{
+		if (useVBOs() && mLocked)
+		{
+			if (mGLBuffer)
+			{
+				if (mResized)
+				{
+					glBufferDataARB(GL_ARRAY_BUFFER_ARB, getSize(), mMappedData, mUsage);
+				}
+				else
+				{
+					if (mEmpty || mDirtyRegions.empty())
+					{
+						glBufferSubDataARB(GL_ARRAY_BUFFER_ARB, 0, getSize(), mMappedData);
+					}
+					else
+					{
+						for (std::vector<DirtyRegion>::iterator i = mDirtyRegions.begin(); i != mDirtyRegions.end(); ++i)
+						{
+							DirtyRegion& region = *i;
+							glBufferSubDataARB(GL_ARRAY_BUFFER_ARB, region.mIndex*mStride, region.mCount*mStride, mMappedData + region.mIndex*mStride);
+							glFlush();
+						}
+					}
+				}
+			}
+			
+			if (mGLIndices)
+			{
+				if (mResized)
+				{
+					glBufferDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB, getIndicesSize(), mMappedIndexData, mUsage);
+				}
+				else
+				{
+					if (mEmpty || mDirtyRegions.empty())
+					{
+						glBufferSubDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0, getIndicesSize(), mMappedIndexData);
+					}
+					else
+					{
+						for (std::vector<DirtyRegion>::iterator i = mDirtyRegions.begin(); i != mDirtyRegions.end(); ++i)
+						{
+							DirtyRegion& region = *i;
+							glBufferSubDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB, region.mIndicesIndex*sizeof(U32), 
+								region.mIndicesCount*sizeof(U32), mMappedIndexData + region.mIndicesIndex*sizeof(U32));
+							glFlush();
+						}
+					}
+				}
+			}
+
+			mDirtyRegions.clear();
+			mFilthy = FALSE;
+			mResized = FALSE;
+
+			if (mUsage == GL_STATIC_DRAW_ARB)
+			{ //static draw buffers can only be mapped a single time
+				//throw out client data (we won't be using it again)
+				delete [] mMappedData;
+				delete [] mMappedIndexData;
+				mMappedIndexData = NULL;
+				mMappedData = NULL;
+				mEmpty = TRUE;
+				mFinal = TRUE;
+			}
+			else
+			{
+				mEmpty = FALSE;
+			}
+			
+			mLocked = FALSE;
+			
+			glFlush();
+		}
+	}
+}
+
+//----------------------------------------------------------------------------
+
+template <class T,S32 type> struct VertexBufferStrider
+{
+	typedef LLStrider<T> strider_t;
+	static bool get(LLVertexBuffer& vbo, 
+					strider_t& strider, 
+					S32 index)
+	{
+		vbo.mapBuffer();
+		if (type == LLVertexBuffer::TYPE_INDEX)
+		{
+			S32 stride = sizeof(T);
+			strider = (T*)(vbo.getMappedIndices() + index*stride);
+			strider.setStride(0);
+			return TRUE;
+		}
+		else if (vbo.hasDataType(type))
+		{
+			S32 stride = vbo.getStride();
+			strider = (T*)(vbo.getMappedData() + vbo.getOffset(type) + index*stride);
+			strider.setStride(stride);
+			return TRUE;
+		}
+		else
+		{
+			llerrs << "VertexBufferStrider could not find valid vertex data." << llendl;
+		}
+		return FALSE;
+	}
+};
+
+
+bool LLVertexBuffer::getVertexStrider(LLStrider<LLVector3>& strider, S32 index)
+{
+	return VertexBufferStrider<LLVector3,TYPE_VERTEX>::get(*this, strider, index);
+}
+bool LLVertexBuffer::getIndexStrider(LLStrider<U32>& strider, S32 index)
+{
+	return VertexBufferStrider<U32,TYPE_INDEX>::get(*this, strider, index);
+}
+bool LLVertexBuffer::getTexCoordStrider(LLStrider<LLVector2>& strider, S32 index)
+{
+	return VertexBufferStrider<LLVector2,TYPE_TEXCOORD>::get(*this, strider, index);
+}
+bool LLVertexBuffer::getTexCoord2Strider(LLStrider<LLVector2>& strider, S32 index)
+{
+	return VertexBufferStrider<LLVector2,TYPE_TEXCOORD2>::get(*this, strider, index);
+}
+bool LLVertexBuffer::getNormalStrider(LLStrider<LLVector3>& strider, S32 index)
+{
+	return VertexBufferStrider<LLVector3,TYPE_NORMAL>::get(*this, strider, index);
+}
+bool LLVertexBuffer::getBinormalStrider(LLStrider<LLVector3>& strider, S32 index)
+{
+	return VertexBufferStrider<LLVector3,TYPE_BINORMAL>::get(*this, strider, index);
+}
+bool LLVertexBuffer::getColorStrider(LLStrider<LLColor4U>& strider, S32 index)
+{
+	return VertexBufferStrider<LLColor4U,TYPE_COLOR>::get(*this, strider, index);
+}
+bool LLVertexBuffer::getWeightStrider(LLStrider<F32>& strider, S32 index)
+{
+	return VertexBufferStrider<F32,TYPE_WEIGHT>::get(*this, strider, index);
+}
+bool LLVertexBuffer::getClothWeightStrider(LLStrider<LLVector4>& strider, S32 index)
+{
+	return VertexBufferStrider<LLVector4,TYPE_CLOTHWEIGHT>::get(*this, strider, index);
+}
+
+void LLVertexBuffer::setStride(S32 type, S32 new_stride)
+{
+	LLMemType mt(LLMemType::MTYPE_VERTEX_DATA);
+	if (mNumVerts)
+	{
+		llerrs << "LLVertexBuffer::setOffset called with mNumVerts = " << mNumVerts << llendl;
+	}
+	// This code assumes that setStride() will only be called once per VBO per type.
+	S32 delta = new_stride - sTypeOffsets[type];
+	for (S32 i=type+1; i<TYPE_MAX; i++)
+	{
+		if (mTypeMask & (1<<i))
+		{
+			mOffsets[i] += delta;
+		}
+	}
+	mStride += delta;
+}
+
+//----------------------------------------------------------------------------
+
+// Set for rendering
+void LLVertexBuffer::setBuffer(U32 data_mask)
+{
+	LLMemType mt(LLMemType::MTYPE_VERTEX_DATA);
+	//set up pointers if the data mask is different ...
+	BOOL setup = (sLastMask != data_mask);
+
+	if (useVBOs())
+	{
+		if (mGLBuffer && (mGLBuffer != sGLRenderBuffer || !sVBOActive))
+		{
+			glBindBufferARB(GL_ARRAY_BUFFER_ARB, mGLBuffer);
+			sVBOActive = TRUE;
+			setup = TRUE; // ... or the bound buffer changed
+		}
+		if (mGLIndices && (mGLIndices != sGLRenderIndices || !sIBOActive))
+		{
+			glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, mGLIndices);
+			sIBOActive = TRUE;
+		}
+		
+		unmapBuffer();
+	}
+	else
+	{
+		if (!mDirtyRegions.empty())
+		{
+			mFilthy = TRUE;
+			mDirtyRegions.clear();
+		}
+		
+		if (mGLBuffer)
+		{
+			if (sEnableVBOs && sVBOActive)
+			{
+				glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
+				sVBOActive = FALSE;
+				setup = TRUE; // ... or a VBO is deactivated
+			}
+			if (sGLRenderBuffer != mGLBuffer)
+			{
+				setup = TRUE; // ... or a client memory pointer changed
+			}
+		}
+		if (sEnableVBOs && mGLIndices && sIBOActive)
+		{
+			glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
+			sIBOActive = FALSE;
+		}
+	}
+	
+	if (mGLIndices)
+	{
+		sGLRenderIndices = mGLIndices;
+	}
+	if (mGLBuffer)
+	{
+		sGLRenderBuffer = mGLBuffer;
+		if (data_mask && setup)
+		{
+			if (!sRenderActive)
+			{
+				llwarns << "Vertex buffer set for rendering outside of render frame." << llendl;
+			}
+			setupVertexBuffer(data_mask); // subclass specific setup (virtual function)
+			sLastMask = data_mask;
+		}
+	}
+}
+
+// virtual (default)
+void LLVertexBuffer::setupVertexBuffer(U32 data_mask) const
+{
+	LLMemType mt(LLMemType::MTYPE_VERTEX_DATA);
+	stop_glerror();
+	U8* base = useVBOs() ? NULL : mMappedData;
+	S32 stride = mStride;
+
+	if ((data_mask & mTypeMask) != data_mask)
+	{
+		llerrs << "LLVertexBuffer::setupVertexBuffer missing required components for supplied data mask." << llendl;
+	}
+
+	if (data_mask & MAP_VERTEX)
+	{
+		glVertexPointer(3,GL_FLOAT, stride, (void*)(base + 0));
+	}
+	if (data_mask & MAP_NORMAL)
+	{
+		glNormalPointer(GL_FLOAT, stride, (void*)(base + mOffsets[TYPE_NORMAL]));
+	}
+	if (data_mask & MAP_TEXCOORD2)
+	{
+		glClientActiveTextureARB(GL_TEXTURE1_ARB);
+		glTexCoordPointer(2,GL_FLOAT, stride, (void*)(base + mOffsets[TYPE_TEXCOORD2]));
+	}
+	if (data_mask & MAP_TEXCOORD)
+	{
+		glClientActiveTextureARB(GL_TEXTURE0_ARB);
+		glTexCoordPointer(2,GL_FLOAT, stride, (void*)(base + mOffsets[TYPE_TEXCOORD]));
+	}
+	if (data_mask & MAP_COLOR)
+	{
+		glColorPointer(4, GL_UNSIGNED_BYTE, stride, (void*)(base + mOffsets[TYPE_COLOR]));
+	}
+	if (data_mask & MAP_BINORMAL)
+	{
+		glVertexAttribPointerARB(6, 3, GL_FLOAT, FALSE,  stride, (void*)(base + mOffsets[TYPE_BINORMAL]));
+	}
+	if (data_mask & MAP_WEIGHT)
+	{
+		glVertexAttribPointerARB(1, 1, GL_FLOAT, FALSE, stride, (void*)(base + mOffsets[TYPE_WEIGHT]));
+	}
+	if (data_mask & MAP_CLOTHWEIGHT)
+	{
+		glVertexAttribPointerARB(4, 4, GL_FLOAT, TRUE,  stride, (void*)(base + mOffsets[TYPE_CLOTHWEIGHT]));
+	}
+
+	llglassertok();
+}
+
+void LLVertexBuffer::markDirty(U32 vert_index, U32 vert_count, U32 indices_index, U32 indices_count)
+{
+	if (useVBOs() && !mFilthy)
+	{
+		if (!mDirtyRegions.empty())
+		{
+			DirtyRegion& region = *(mDirtyRegions.rbegin());
+			if (region.mIndex + region.mCount == vert_index &&
+				region.mIndicesIndex + region.mIndicesCount == indices_index)
+			{
+				region.mCount += vert_count;
+				region.mIndicesCount += indices_count;
+				return;
+			}
+		}
+
+		mDirtyRegions.push_back(DirtyRegion(vert_index,vert_count,indices_index,indices_count));
+	}
+}
+
+void LLVertexBuffer::markClean()
+{
+	if (!mResized && !mEmpty && !mFilthy)
+	{
+		buffer_list_t::reverse_iterator iter = sLockedList.rbegin();
+		if (*iter == this)
+		{
+			mLocked = FALSE;
+			sLockedList.pop_back();
+		}
+	}
+}
+
-- 
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