mapnik/agg/src/agg_sqrt_tables.cpp

//----------------------------------------------------------------------------
// Anti-Grain Geometry - Version 2.4
// Copyright (C) 2002-2005 Maxim Shemanarev (http://www.antigrain.com)
//
// Permission to copy, use, modify, sell and distribute this software 
// is granted provided this copyright notice appears in all copies. 
// This software is provided "as is" without express or implied
// warranty, and with no claim as to its suitability for any purpose.
//
//----------------------------------------------------------------------------
// Contact: mcseem@antigrain.com
//          mcseemagg@yahoo.com
//          http://www.antigrain.com
//----------------------------------------------------------------------------
//
// static tables for fast integer sqrt
//
//----------------------------------------------------------------------------

#include "agg_basics.h"

namespace agg
{
    int16u g_sqrt_table[1024] =                       //----------g_sqrt_table
    {
        0,
        2048,2896,3547,4096,4579,5017,5418,5793,6144,6476,6792,7094,7384,7663,7932,8192,8444,
        8689,8927,9159,9385,9606,9822,10033,10240,10443,10642,10837,11029,11217,11403,11585,
        11765,11942,12116,12288,12457,12625,12790,12953,13114,13273,13430,13585,13738,13890,
        14040,14189,14336,14482,14626,14768,14910,15050,15188,15326,15462,15597,15731,15864,
        15995,16126,16255,16384,16512,16638,16764,16888,17012,17135,17257,17378,17498,17618,
        17736,17854,17971,18087,18203,18318,18432,18545,18658,18770,18882,18992,19102,19212,
        19321,19429,19537,19644,19750,19856,19961,20066,20170,20274,20377,20480,20582,20684,
        20785,20886,20986,21085,21185,21283,21382,21480,21577,21674,21771,21867,21962,22058,
        22153,22247,22341,22435,22528,22621,22713,22806,22897,22989,23080,23170,23261,23351,
        23440,23530,23619,23707,23796,23884,23971,24059,24146,24232,24319,24405,24491,24576,
        24661,24746,24831,24915,24999,25083,25166,25249,25332,25415,25497,25580,25661,25743,
        25824,25905,25986,26067,26147,26227,26307,26387,26466,26545,26624,26703,26781,26859,
        26937,27015,27092,27170,27247,27324,27400,27477,27553,27629,27705,27780,27856,27931,
        28006,28081,28155,28230,28304,28378,28452,28525,28599,28672,28745,28818,28891,28963,
        29035,29108,29180,29251,29323,29394,29466,29537,29608,29678,29749,29819,29890,29960,
        30030,30099,30169,30238,30308,30377,30446,30515,30583,30652,30720,30788,30856,30924,
        30992,31059,31127,31194,31261,31328,31395,31462,31529,31595,31661,31727,31794,31859,
        31925,31991,32056,32122,32187,32252,32317,32382,32446,32511,32575,32640,32704,32768,
        32832,32896,32959,33023,33086,33150,33213,33276,33339,33402,33465,33527,33590,33652,
        33714,33776,33839,33900,33962,34024,34086,34147,34208,34270,34331,34392,34453,34514,
        34574,34635,34695,34756,34816,34876,34936,34996,35056,35116,35176,35235,35295,35354,
        35413,35472,35531,35590,35649,35708,35767,35825,35884,35942,36001,36059,36117,36175,
        36233,36291,36348,36406,36464,36521,36578,36636,36693,36750,36807,36864,36921,36978,
        37034,37091,37147,37204,37260,37316,37372,37429,37485,37540,37596,37652,37708,37763,
        37819,37874,37929,37985,38040,38095,38150,38205,38260,38315,38369,38424,38478,38533,
        38587,38642,38696,38750,38804,38858,38912,38966,39020,39073,39127,39181,39234,39287,
        39341,39394,39447,39500,39553,39606,39659,39712,39765,39818,39870,39923,39975,40028,
        40080,40132,40185,40237,40289,40341,40393,40445,40497,40548,40600,40652,40703,40755,
        40806,40857,40909,40960,41011,41062,41113,41164,41215,41266,41317,41368,41418,41469,
        41519,41570,41620,41671,41721,41771,41821,41871,41922,41972,42021,42071,42121,42171,
        42221,42270,42320,42369,42419,42468,42518,42567,42616,42665,42714,42763,42813,42861,
        42910,42959,43008,43057,43105,43154,43203,43251,43300,43348,43396,43445,43493,43541,
        43589,43637,43685,43733,43781,43829,43877,43925,43972,44020,44068,44115,44163,44210,
        44258,44305,44352,44400,44447,44494,44541,44588,44635,44682,44729,44776,44823,44869,
        44916,44963,45009,45056,45103,45149,45195,45242,45288,45334,45381,45427,45473,45519,
        45565,45611,45657,45703,45749,45795,45840,45886,45932,45977,46023,46069,46114,46160,
        46205,46250,46296,46341,46386,46431,46477,46522,46567,46612,46657,46702,46746,46791,
        46836,46881,46926,46970,47015,47059,47104,47149,47193,47237,47282,47326,47370,47415,
        47459,47503,47547,47591,47635,47679,47723,47767,47811,47855,47899,47942,47986,48030,
        48074,48117,48161,48204,48248,48291,48335,48378,48421,48465,48508,48551,48594,48637,
        48680,48723,48766,48809,48852,48895,48938,48981,49024,49067,49109,49152,49195,49237,
        49280,49322,49365,49407,49450,49492,49535,49577,49619,49661,49704,49746,49788,49830,
        49872,49914,49956,49998,50040,50082,50124,50166,50207,50249,50291,50332,50374,50416,
        50457,50499,50540,50582,50623,50665,50706,50747,50789,50830,50871,50912,50954,50995,
        51036,51077,51118,51159,51200,51241,51282,51323,51364,51404,51445,51486,51527,51567,
        51608,51649,51689,51730,51770,51811,51851,51892,51932,51972,52013,52053,52093,52134,
        52174,52214,52254,52294,52334,52374,52414,52454,52494,52534,52574,52614,52654,52694,
        52734,52773,52813,52853,52892,52932,52972,53011,53051,53090,53130,53169,53209,53248,
        53287,53327,53366,53405,53445,53484,53523,53562,53601,53640,53679,53719,53758,53797,
        53836,53874,53913,53952,53991,54030,54069,54108,54146,54185,54224,54262,54301,54340,
        54378,54417,54455,54494,54532,54571,54609,54647,54686,54724,54762,54801,54839,54877,
        54915,54954,54992,55030,55068,55106,55144,55182,55220,55258,55296,55334,55372,55410,
        55447,55485,55523,55561,55599,55636,55674,55712,55749,55787,55824,55862,55900,55937,
        55975,56012,56049,56087,56124,56162,56199,56236,56273,56311,56348,56385,56422,56459,
        56497,56534,56571,56608,56645,56682,56719,56756,56793,56830,56867,56903,56940,56977,
        57014,57051,57087,57124,57161,57198,57234,57271,57307,57344,57381,57417,57454,57490,
        57527,57563,57599,57636,57672,57709,57745,57781,57817,57854,57890,57926,57962,57999,
        58035,58071,58107,58143,58179,58215,58251,58287,58323,58359,58395,58431,58467,58503,
        58538,58574,58610,58646,58682,58717,58753,58789,58824,58860,58896,58931,58967,59002,
        59038,59073,59109,59144,59180,59215,59251,59286,59321,59357,59392,59427,59463,59498,
        59533,59568,59603,59639,59674,59709,59744,59779,59814,59849,59884,59919,59954,59989,
        60024,60059,60094,60129,60164,60199,60233,60268,60303,60338,60373,60407,60442,60477,
        60511,60546,60581,60615,60650,60684,60719,60753,60788,60822,60857,60891,60926,60960,
        60995,61029,61063,61098,61132,61166,61201,61235,61269,61303,61338,61372,61406,61440,
        61474,61508,61542,61576,61610,61644,61678,61712,61746,61780,61814,61848,61882,61916,
        61950,61984,62018,62051,62085,62119,62153,62186,62220,62254,62287,62321,62355,62388,
        62422,62456,62489,62523,62556,62590,62623,62657,62690,62724,62757,62790,62824,62857,
        62891,62924,62957,62991,63024,63057,63090,63124,63157,63190,63223,63256,63289,63323,
        63356,63389,63422,63455,63488,63521,63554,63587,63620,63653,63686,63719,63752,63785,
        63817,63850,63883,63916,63949,63982,64014,64047,64080,64113,64145,64178,64211,64243,
        64276,64309,64341,64374,64406,64439,64471,64504,64536,64569,64601,64634,64666,64699,
        64731,64763,64796,64828,64861,64893,64925,64957,64990,65022,65054,65086,65119,65151,
        65183,65215,65247,65279,65312,65344,65376,65408,65440,65472,65504
    };


    int8 g_elder_bit_table[256] =          //---------g_elder_bit_table
    {
        0,0,1,1,2,2,2,2,3,3,3,3,3,3,3,3,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,4,
        5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,5,
        6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
        6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,
        7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
        7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
        7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,
        7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7,7
    };
 
}