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// Copyright 2009 Intel Corporation
// SPDX-License-Identifier: Apache-2.0
#pragma once
/*! \file render/util.h Defines some utility functions shared by different
* shading codes */
#include "common/OSPCommon.h"
namespace ospray {
// TODO: Could use pdep/pext
inline uint32_t partitionZOrder(uint32_t n)
{
n &= 0x0000FFFF;
n = (n | (n << 8)) & 0x00FF00FF;
n = (n | (n << 4)) & 0x0F0F0F0F;
n = (n | (n << 2)) & 0x33333333;
n = (n | (n << 1)) & 0x55555555;
return n;
}
inline uint32_t unpartitionZOrder(uint32_t n)
{
n &= 0x55555555;
n = (n ^ (n >> 1)) & 0x33333333;
n = (n ^ (n >> 2)) & 0x0F0F0F0F;
n = (n ^ (n >> 4)) & 0x00FF00FF;
n = (n ^ (n >> 8)) & 0x0000FFFF;
return n;
}
inline uint32_t interleaveZOrder(uint32_t x, uint32_t y)
{
return partitionZOrder(x) | (partitionZOrder(y) << 1);
}
inline void deinterleaveZOrder(uint32_t z, uint32_t &x, uint32_t &y)
{
x = y = 0;
x = unpartitionZOrder(z);
y = unpartitionZOrder(z >> 1);
}
} // namespace ospray
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