llvertexbuffer.cpp

/** 
 * @file llvertexbuffer.cpp
 * @brief LLVertexBuffer implementation
 *
 * $LicenseInfo:firstyear=2003&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "linden_common.h"

#include <boost/static_assert.hpp>
#include "llsys.h"
#include "llvertexbuffer.h"
// #include "llrender.h"
#include "llglheaders.h"
#include "llrender.h"
#include "llvector4a.h"
#include "llshadermgr.h"
#include "llglslshader.h"
#include "llmemory.h"

//Next Highest Power Of Two
//helper function, returns first number > v that is a power of 2, or v if v is already a power of 2
U32 nhpo2(U32 v)
{
	U32 r = 1;
	while (r < v) {
		r *= 2;
	}
	return r;
}

//which power of 2 is i?
//assumes i is a power of 2 > 0
U32 wpo2(U32 i)
{
	llassert(i > 0);
	llassert(nhpo2(i) == i);

	U32 r = 0;

	while (i >>= 1) ++r;

	return r;
}


const U32 LL_VBO_BLOCK_SIZE = 2048;
const U32 LL_VBO_POOL_MAX_SEED_SIZE = 256*1024;

U32 vbo_block_size(U32 size)
{ //what block size will fit size?