eic-opticks/CSG/csg_pack.h

0001 /*
0002  * Copyright (c) 2019 Opticks Team. All Rights Reserved.
0003  *
0004  * This file is part of Opticks
0005  * (see https://bitbucket.org/simoncblyth/opticks).
0006  *
0007  * Licensed under the Apache License, Version 2.0 (the "License");
0008  * you may not use this file except in compliance with the License.
0009  * You may obtain a copy of the License at
0010  *
0011  *   http://www.apache.org/licenses/LICENSE-2.0
0012  *
0013  * Unless required by applicable law or agreed to in writing, software
0014  * distributed under the License is distributed on an "AS IS" BASIS,
0015  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
0016  * See the License for the specific language governing permissions and
0017  * limitations under the License.
0018  */
0019
0020 #pragma once
0021
0022 /**0
0023 pack.h
0024 ========
0025
0026 * * https://bitbucket.org/simoncblyth/opticks/src/master/optixrap/cu/pack.h
0027
0028 .. contents:: Table of Contents
0029    :depth: 2
0030
0031 0**/
0032
0033
0034 /**1
0035 pack.h : PACK4 Macro
0036 ---------------------
0037
0038 Packs 4 8bit integers into 32 bits
0039
0040 1**/
0041
0042 #define PACK4( a, b, c, d)   ( \
0043        (( (a) & 0xff ) <<  0 ) | \
0044        (( (b) & 0xff ) <<  8 ) | \
0045        (( (c) & 0xff ) << 16 ) | \
0046        (( (d) & 0xff ) << 24 ) \
0047                              )
0048
0049
0050
0051
0052 /**2
0053 pack.h : UNPACK4_0/1/2/3 Macros
0054 --------------------------------
0055
0056 Returns 8 bit constituent from the packed 32 bits.
0057
0058 2**/
0059
0060 #define UNPACK4_0( packed ) (  ((packed) >>  0) & 0xff )
0061 #define UNPACK4_1( packed ) (  ((packed) >>  8) & 0xff )
0062 #define UNPACK4_2( packed ) (  ((packed) >> 16) & 0xff )
0063 #define UNPACK4_3( packed ) (  ((packed) >> 24) & 0xff )
0064
0065