llvertexbuffer.cpp

				{
					llerrs << "Invalid GL vertex buffer bound: " << buff << llendl;
				}

				glGetIntegerv(GL_ELEMENT_ARRAY_BUFFER_BINDING_ARB, &buff);
				if (buff != mGLIndices)
				{
					llerrs << "Invalid GL index buffer bound: " << buff << llendl;
				}
			}

			if (mGLBuffer)
			{
				stop_glerror();
				glBufferDataARB(GL_ARRAY_BUFFER_ARB, getSize(), NULL, mUsage);
				stop_glerror();
			}
			if (mGLIndices)
			{
				stop_glerror();
				glBufferDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB, getIndicesSize(), NULL, mUsage);
				stop_glerror();
			}

			mEmpty = TRUE;
			mResized = FALSE;

			if (data_mask != 0)
			{
				llerrs << "Buffer set for rendering before being filled after resize." << llendl;
			}
		}

		unmapBuffer();
	}
	else
	{		
		if (mGLBuffer)
		{
			if (sEnableVBOs && sVBOActive)
			{
				glBindBufferARB(GL_ARRAY_BUFFER_ARB, 0);
				sBindCount++;
				sVBOActive = FALSE;
				setup = TRUE; // ... or a VBO is deactivated
			}
			if (sGLRenderBuffer != mGLBuffer)
			{
				setup = TRUE; // ... or a client memory pointer changed
			}
		}
		if (sEnableVBOs && mGLIndices && sIBOActive)
		{
			/*if (sMapped)
			{
				llerrs << "VBO unbound while potentially mapped!" << llendl;
			}*/
			glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, 0);
			sBindCount++;
			sIBOActive = FALSE;
		}
	}

	setupClientArrays(data_mask);
	
	if (mGLIndices)
	{
		sGLRenderIndices = mGLIndices;
	}
	if (mGLBuffer)
	{
		sGLRenderBuffer = mGLBuffer;
		if (data_mask && setup)
		{
			setupVertexBuffer(data_mask); // subclass specific setup (virtual function)
			sSetCount++;
		}
	}
}

// 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_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]));
		glClientActiveTextureARB(GL_TEXTURE0_ARB);
	}
	if (data_mask & MAP_TEXCOORD)
	{
		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]));
	}
	if (data_mask & MAP_VERTEX)
	{
		glVertexPointer(3,GL_FLOAT, stride, (void*)(base + 0));
	}

	llglassertok();
}

void LLVertexBuffer::markDirty(U32 vert_index, U32 vert_count, U32 indices_index, U32 indices_count)
{
	// TODO: use GL_APPLE_flush_buffer_range here
	/*if (useVBOs() && !mFilthy)
	{
	
	}*/
}