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bflib_render_gpoly.c
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/******************************************************************************/
// Bullfrog Engine Emulation Library - for use to remake classic games like
// Syndicate Wars, Magic Carpet or Dungeon Keeper.
/******************************************************************************/
/** @file bflib_render_gpoly.c
* Rendering function draw_gpoly() for drawing 3D view elements.
* @par Purpose:
* Function for rendering 3D elements.
* @par Comment:
* Go away from here, you bad optimizer! Do not compile this with optimizations.
* @author Tomasz Lis
* @date 20 Mar 2009 - 14 Feb 2010
* @par Copying and copyrights:
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
/******************************************************************************/
#include "pre_inc.h"
#include "bflib_render.h"
#include "globals.h"
#include "bflib_basics.h"
#include "bflib_video.h"
#include "bflib_sprite.h"
#include "bflib_vidraw.h"
#include "post_inc.h"
/******************************************************************************/
/******************************************************************************/
long gpoly_countdown[] = { 0,-15,-14,-13,-12,-11,-10, -9, -8, -7, -6, -5, -4, -3, -2, -1 };
long gpoly_reptable[] = {
0x0,0x7FFFFFFF,0x3FFFFFFF,0x2AAAAAAA,0x1FFFFFFF,0x19999999,0x15555555,0x12492492,
0x0FFFFFFF,0x0E38E38E,0x0CCCCCCC,0x0BA2E8BA,0x0AAAAAAA, 0x9D89D89, 0x9249249, 0x8888888,
0x7FFFFFF, 0x7878787, 0x71C71C7, 0x6BCA1AF, 0x6666666, 0x6186186, 0x5D1745D, 0x590B216,
0x5555555, 0x51EB851, 0x4EC4EC4, 0x4BDA12F, 0x4924924, 0x469EE58, 0x4444444, 0x4210842,
0x3FFFFFF, 0x3E0F83E, 0x3C3C3C3, 0x3A83A83, 0x38E38E3, 0x3759F22, 0x35E50D7, 0x3483483,
0x3333333, 0x31F3831, 0x30C30C3, 0x2FA0BE8, 0x2E8BA2E, 0x2D82D82, 0x2C8590B, 0x2B93105,
0x2AAAAAA, 0x29CBC14, 0x28F5C28, 0x2828282, 0x2762762, 0x26A439F, 0x25ED097, 0x253C825,
0x2492492, 0x23EE08F, 0x234F72C, 0x22B63CB, 0x2222222, 0x2192E29, 0x2108421, 0x2082082,
0x1FFFFFF, 0x1F81F81, 0x1F07C1F, 0x1E9131A, 0x1E1E1E1, 0x1DAE607, 0x1D41D41, 0x1CD8568,
0x1C71C71, 0x1C0E070, 0x1BACF91, 0x1B4E81B, 0x1AF286B, 0x1A98EF6, 0x1A41A41, 0x19EC8E9,
0x1999999, 0x1948B0F, 0x18F9C18, 0x18ACB90, 0x1861861, 0x1818181, 0x17D05F4, 0x178A4C8,
0x1745D17, 0x1702E05, 0x16C16C1, 0x1681681, 0x1642C85, 0x1605816, 0x15C9882, 0x158ED23,
0x1555555, 0x151D07E, 0x14E5E0A, 0x14AFD6A, 0x147AE14, 0x1446F86, 0x1414141, 0x13E22CB,
0x13B13B1, 0x1381381, 0x13521CF, 0x1323E34, 0x12F684B, 0x12C9FB4, 0x129E412, 0x127350B,
0x1249249, 0x121FB78, 0x11F7047, 0x11CF06A, 0x11A7B96, 0x1181181, 0x115B1E5, 0x1135C81,
0x1111111, 0x10ECF56, 0x10C9714, 0x10A6810, 0x1084210, 0x10624DD, 0x1041041, 0x1020408,
0x0FFFFFF, 0x0FE03F8, 0x0FC0FC0, 0x0FA232C, 0x0F83E0F, 0x0F6603D, 0x0F4898D, 0x0F2B9D6,
0x0F0F0F0, 0x0EF2EB7, 0x0ED7303, 0x0EBBDB2, 0x0EA0EA0, 0x0E865AC, 0x0E6C2B4, 0x0E52598,
0x0E38E38, 0x0E1FC78, 0x0E07038, 0x0DEE95C, 0x0DD67C8, 0x0DBEB61, 0x0DA740D, 0x0D901B2,
0x0D79435, 0x0D62B80, 0x0D4C77B, 0x0D3680D, 0x0D20D20, 0x0D0B69F, 0x0CF6474, 0x0CE168A,
0x0CCCCCC, 0x0CB8727, 0x0CA4587, 0x0C907DA, 0x0C7CE0C, 0x0C6980C, 0x0C565C8, 0x0C4372F,
0x0C30C30, 0x0C1E4BB, 0x0C0C0C0, 0x0BFA02F, 0x0BE82FA, 0x0BD6910, 0x0BC5264, 0x0BB3EE7,
0x0BA2E8B, 0x0B92143, 0x0B81702, 0x0B70FBB, 0x0B60B60, 0x0B509E6, 0x0B40B40, 0x0B30F63,
0x0B21642, 0x0B11FD3, 0x0B02C0B, 0x0AF3ADD, 0x0AE4C41, 0x0AD602B, 0x0AC7691, 0x0AB8F69,
0x0AAAAAA, 0x0A9C84A, 0x0A8E83F, 0x0A80A80, 0x0A72F05, 0x0A655C4, 0x0A57EB5, 0x0A4A9CF,
0x0A3D70A, 0x0A3065E, 0x0A237C3, 0x0A16B31, 0x0A0A0A0, 0x09FD809, 0x09F1165, 0x09E4CAD,
0x09D89D8, 0x09CC8E1, 0x09C09C0, 0x09B4C6F, 0x09A90E7, 0x099D722, 0x0991F1A, 0x09868C8,
0x097B425, 0x097012E, 0x0964FDA, 0x095A025, 0x094F209, 0x0944580, 0x0939A85, 0x092F113,
0x0924924, 0x091A2B3, 0x090FDBC, 0x0905A38, 0x08FB823, 0x08F1779, 0x08E7835, 0x08DDA52,
0x08D3DCB, 0x08CA29C, 0x08C08C0, 0x08B7034, 0x08AD8F2, 0x08A42F8, 0x089AE40, 0x0891AC7,
0x0888888, 0x087F780, 0x08767AB, 0x086D905, 0x0864B8A, 0x085BF37, 0x0853408, 0x084A9F9,
0x0842108, 0x0839930, 0x083126E, 0x0828CBF, 0x0820820, 0x081848D, 0x0810204, 0x0808080,
0x0, 0x0 };
long gpoly_divtable[][64] = {
{-8388607,-8388607,-8388607,-8388607,-8388607,-8388607,-8388607,-8388607,
-8388607,-8388607,-8388607,-8388607,-8388607,-8388607,-8388607,-8388607,
-8388607,-8388607,-8388607,-8388607,-8388607,-8388607,-8388607,-8388607,
-8388607,-8388607,-8388607,-8388607,-8388607,-8388607,-8388607,-8388607,
0, 8388607, 8388607, 8388607, 8388607, 8388607, 8388607, 8388607,
8388607, 8388607, 8388607, 8388607, 8388607, 8388607, 8388607, 8388607,
8388607, 8388607, 8388607, 8388607, 8388607, 8388607, 8388607, 8388607,
8388607, 8388607, 8388607, 8388607, 8388607, 8388607, 8388607, 8388607,},
{-2097152,-2031616,-1966080,-1900544,-1835008,-1769472,-1703936,-1638400,
-1572864,-1507328,-1441792,-1376256,-1310720,-1245184,-1179648,-1114112,
-1048576, -983040, -917504, -851968, -786432, -720896, -655360, -589824,
-524288, -458752, -393216, -327680, -262144, -196608, -131072, -65536,
0, 65536, 131072, 196608, 262144, 327680, 393216, 458752,
524288, 589824, 655360, 720896, 786432, 851968, 917504, 983040,
1048576, 1114112, 1179648, 1245184, 1310720, 1376256, 1441792, 1507328,
1572864, 1638400, 1703936, 1769472, 1835008, 1900544, 1966080, 2031616,},
{-1048576,-1015808, -983040, -950272, -917504, -884736, -851968, -819200,
-786432, -753664, -720896, -688128, -655360, -622592, -589824, -557056,
-524288, -491520, -458752, -425984, -393216, -360448, -327680, -294912,
-262144, -229376, -196608, -163840, -131072, -98304, -65536, -32768,
0, 32768, 65536, 98304, 131072, 163840, 196608, 229376,
262144, 294912, 327680, 360448, 393216, 425984, 458752, 491520,
524288, 557056, 589824, 622592, 655360, 688128, 720896, 753664,
786432, 819200, 851968, 884736, 917504, 950272, 983040, 1015808,},
{ -699050, -677205, -655360, -633514, -611669, -589824, -567978, -546133,
-524288, -502442, -480597, -458752, -436906, -415061, -393216, -371370,
-349525, -327680, -305834, -283989, -262144, -240298, -218453, -196608,
-174762, -152917, -131072, -109226, -87381, -65536, -43690, -21845,
0, 21845, 43690, 65536, 87381, 109226, 131072, 152917,
174762, 196608, 218453, 240298, 262144, 283989, 305834, 327680,
349525, 371370, 393216, 415061, 436906, 458752, 480597, 502442,
524288, 546133, 567978, 589824, 611669, 633514, 655360, 677205,},
{ -524288, -507904, -491520, -475136, -458752, -442368, -425984, -409600,
-393216, -376832, -360448, -344064, -327680, -311296, -294912, -278528,
-262144, -245760, -229376, -212992, -196608, -180224, -163840, -147456,
-131072, -114688, -98304, -81920, -65536, -49152, -32768, -16384,
0, 16384, 32768, 49152, 65536, 81920, 98304, 114688,
131072, 147456, 163840, 180224, 196608, 212992, 229376, 245760,
262144, 278528, 294912, 311296, 327680, 344064, 360448, 376832,
393216, 409600, 425984, 442368, 458752, 475136, 491520, 507904,},
{ -419430, -406323, -393216, -380108, -367001, -353894, -340787, -327680,
-314572, -301465, -288358, -275251, -262144, -249036, -235929, -222822,
-209715, -196608, -183500, -170393, -157286, -144179, -131072, -117964,
-104857, -91750, -78643, -65536, -52428, -39321, -26214, -13107,
0, 13107, 26214, 39321, 52428, 65536, 78643, 91750,
104857, 117964, 131072, 144179, 157286, 170393, 183500, 196608,
209715, 222822, 235929, 249036, 262144, 275251, 288358, 301465,
314572, 327680, 340787, 353894, 367001, 380108, 393216, 406323,},
{ -349525, -338602, -327680, -316757, -305834, -294912, -283989, -273066,
-262144, -251221, -240298, -229376, -218453, -207530, -196608, -185685,
-174762, -163840, -152917, -141994, -131072, -120149, -109226, -98304,
-87381, -76458, -65536, -54613, -43690, -32768, -21845, -10922,
0, 10922, 21845, 32768, 43690, 54613, 65536, 76458,
87381, 98304, 109226, 120149, 131072, 141994, 152917, 163840,
174762, 185685, 196608, 207530, 218453, 229376, 240298, 251221,
262144, 273066, 283989, 294912, 305834, 316757, 327680, 338602,},
{ -299593, -290230, -280868, -271506, -262144, -252781, -243419, -234057,
-224694, -215332, -205970, -196608, -187245, -177883, -168521, -159158,
-149796, -140434, -131072, -121709, -112347, -102985, -93622, -84260,
-74898, -65536, -56173, -46811, -37449, -28086, -18724, -9362,
0, 9362, 18724, 28086, 37449, 46811, 56173, 65536,
74898, 84260, 93622, 102985, 112347, 121709, 131072, 140434,
149796, 159158, 168521, 177883, 187245, 196608, 205970, 215332,
224694, 234057, 243419, 252781, 262144, 271506, 280868, 290230,},
{ -262144, -253952, -245760, -237568, -229376, -221184, -212992, -204800,
-196608, -188416, -180224, -172032, -163840, -155648, -147456, -139264,
-131072, -122880, -114688, -106496, -98304, -90112, -81920, -73728,
-65536, -57344, -49152, -40960, -32768, -24576, -16384, -8192,
0, 8192, 16384, 24576, 32768, 40960, 49152, 57344,
65536, 73728, 81920, 90112, 98304, 106496, 114688, 122880,
131072, 139264, 147456, 155648, 163840, 172032, 180224, 188416,
196608, 204800, 212992, 221184, 229376, 237568, 245760, 253952,},
{ -233016, -225735, -218453, -211171, -203889, -196608, -189326, -182044,
-174762, -167480, -160199, -152917, -145635, -138353, -131072, -123790,
-116508, -109226, -101944, -94663, -87381, -80099, -72817, -65536,
-58254, -50972, -43690, -36408, -29127, -21845, -14563, -7281,
0, 7281, 14563, 21845, 29127, 36408, 43690, 50972,
58254, 65536, 72817, 80099, 87381, 94663, 101944, 109226,
116508, 123790, 131072, 138353, 145635, 152917, 160199, 167480,
174762, 182044, 189326, 196608, 203889, 211171, 218453, 225735,},
{ -209715, -203161, -196608, -190054, -183500, -176947, -170393, -163840,
-157286, -150732, -144179, -137625, -131072, -124518, -117964, -111411,
-104857, -98304, -91750, -85196, -78643, -72089, -65536, -58982,
-52428, -45875, -39321, -32768, -26214, -19660, -13107, -6553,
0, 6553, 13107, 19660, 26214, 32768, 39321, 45875,
52428, 58982, 65536, 72089, 78643, 85196, 91750, 98304,
104857, 111411, 117964, 124518, 131072, 137625, 144179, 150732,
157286, 163840, 170393, 176947, 183500, 190054, 196608, 203161,},
{ -190650, -184692, -178734, -172776, -166818, -160861, -154903, -148945,
-142987, -137029, -131072, -125114, -119156, -113198, -107240, -101282,
-95325, -89367, -83409, -77451, -71493, -65536, -59578, -53620,
-47662, -41704, -35746, -29789, -23831, -17873, -11915, -5957,
0, 5957, 11915, 17873, 23831, 29789, 35746, 41704,
47662, 53620, 59578, 65536, 71493, 77451, 83409, 89367,
95325, 101282, 107240, 113198, 119156, 125114, 131072, 137029,
142987, 148945, 154903, 160861, 166818, 172776, 178734, 184692,},
{ -174762, -169301, -163840, -158378, -152917, -147456, -141994, -136533,
-131072, -125610, -120149, -114688, -109226, -103765, -98304, -92842,
-87381, -81920, -76458, -70997, -65536, -60074, -54613, -49152,
-43690, -38229, -32768, -27306, -21845, -16384, -10922, -5461,
0, 5461, 10922, 16384, 21845, 27306, 32768, 38229,
43690, 49152, 54613, 60074, 65536, 70997, 76458, 81920,
87381, 92842, 98304, 103765, 109226, 114688, 120149, 125610,
131072, 136533, 141994, 147456, 152917, 158378, 163840, 169301,},
{ -161319, -156278, -151236, -146195, -141154, -136113, -131072, -126030,
-120989, -115948, -110907, -105865, -100824, -95783, -90742, -85700,
-80659, -75618, -70577, -65536, -60494, -55453, -50412, -45371,
-40329, -35288, -30247, -25206, -20164, -15123, -10082, -5041,
0, 5041, 10082, 15123, 20164, 25206, 30247, 35288,
40329, 45371, 50412, 55453, 60494, 65536, 70577, 75618,
80659, 85700, 90742, 95783, 100824, 105865, 110907, 115948,
120989, 126030, 131072, 136113, 141154, 146195, 151236, 156278,},
{ -149796, -145115, -140434, -135753, -131072, -126390, -121709, -117028,
-112347, -107666, -102985, -98304, -93622, -88941, -84260, -79579,
-74898, -70217, -65536, -60854, -56173, -51492, -46811, -42130,
-37449, -32768, -28086, -23405, -18724, -14043, -9362, -4681,
0, 4681, 9362, 14043, 18724, 23405, 28086, 32768,
37449, 42130, 46811, 51492, 56173, 60854, 65536, 70217,
74898, 79579, 84260, 88941, 93622, 98304, 102985, 107666,
112347, 117028, 121709, 126390, 131072, 135753, 140434, 145115,},
{ -139810, -135441, -131072, -126702, -122333, -117964, -113595, -109226,
-104857, -100488, -96119, -91750, -87381, -83012, -78643, -74274,
-69905, -65536, -61166, -56797, -52428, -48059, -43690, -39321,
-34952, -30583, -26214, -21845, -17476, -13107, -8738, -4369,
0, 4369, 8738, 13107, 17476, 21845, 26214, 30583,
34952, 39321, 43690, 48059, 52428, 56797, 61166, 65536,
69905, 74274, 78643, 83012, 87381, 91750, 96119, 100488,
104857, 109226, 113595, 117964, 122333, 126702, 131072, 135441,},
{ -131072, -126976, -122880, -118784, -114688, -110592, -106496, -102400,
-98304, -94208, -90112, -86016, -81920, -77824, -73728, -69632,
-65536, -61440, -57344, -53248, -49152, -45056, -40960, -36864,
-32768, -28672, -24576, -20480, -16384, -12288, -8192, -4096,
0, 4096, 8192, 12288, 16384, 20480, 24576, 28672,
32768, 36864, 40960, 45056, 49152, 53248, 57344, 61440,
65536, 69632, 73728, 77824, 81920, 86016, 90112, 94208,
98304, 102400, 106496, 110592, 114688, 118784, 122880, 126976,},
{ -123361, -119506, -115651, -111796, -107941, -104086, -100231, -96376,
-92521, -88666, -84811, -80956, -77101, -73246, -69391, -65536,
-61680, -57825, -53970, -50115, -46260, -42405, -38550, -34695,
-30840, -26985, -23130, -19275, -15420, -11565, -7710, -3855,
0, 3855, 7710, 11565, 15420, 19275, 23130, 26985,
30840, 34695, 38550, 42405, 46260, 50115, 53970, 57825,
61680, 65536, 69391, 73246, 77101, 80956, 84811, 88666,
92521, 96376, 100231, 104086, 107941, 111796, 115651, 119506,},
{ -116508, -112867, -109226, -105585, -101944, -98304, -94663, -91022,
-87381, -83740, -80099, -76458, -72817, -69176, -65536, -61895,
-58254, -54613, -50972, -47331, -43690, -40049, -36408, -32768,
-29127, -25486, -21845, -18204, -14563, -10922, -7281, -3640,
0, 3640, 7281, 10922, 14563, 18204, 21845, 25486,
29127, 32768, 36408, 40049, 43690, 47331, 50972, 54613,
58254, 61895, 65536, 69176, 72817, 76458, 80099, 83740,
87381, 91022, 94663, 98304, 101944, 105585, 109226, 112867,},
{ -110376, -106927, -103477, -100028, -96579, -93130, -89680, -86231,
-82782, -79333, -75883, -72434, -68985, -65536, -62086, -58637,
-55188, -51738, -48289, -44840, -41391, -37941, -34492, -31043,
-27594, -24144, -20695, -17246, -13797, -10347, -6898, -3449,
0, 3449, 6898, 10347, 13797, 17246, 20695, 24144,
27594, 31043, 34492, 37941, 41391, 44840, 48289, 51738,
55188, 58637, 62086, 65536, 68985, 72434, 75883, 79333,
82782, 86231, 89680, 93130, 96579, 100028, 103477, 106927,},
{ -104857, -101580, -98304, -95027, -91750, -88473, -85196, -81920,
-78643, -75366, -72089, -68812, -65536, -62259, -58982, -55705,
-52428, -49152, -45875, -42598, -39321, -36044, -32768, -29491,
-26214, -22937, -19660, -16384, -13107, -9830, -6553, -3276,
0, 3276, 6553, 9830, 13107, 16384, 19660, 22937,
26214, 29491, 32768, 36044, 39321, 42598, 45875, 49152,
52428, 55705, 58982, 62259, 65536, 68812, 72089, 75366,
78643, 81920, 85196, 88473, 91750, 95027, 98304, 101580,},
{ -99864, -96743, -93622, -90502, -87381, -84260, -81139, -78019,
-74898, -71777, -68656, -65536, -62415, -59294, -56173, -53052,
-49932, -46811, -43690, -40569, -37449, -34328, -31207, -28086,
-24966, -21845, -18724, -15603, -12483, -9362, -6241, -3120,
0, 3120, 6241, 9362, 12483, 15603, 18724, 21845,
24966, 28086, 31207, 34328, 37449, 40569, 43690, 46811,
49932, 53052, 56173, 59294, 62415, 65536, 68656, 71777,
74898, 78019, 81139, 84260, 87381, 90502, 93622, 96743,},
{ -95325, -92346, -89367, -86388, -83409, -80430, -77451, -74472,
-71493, -68514, -65536, -62557, -59578, -56599, -53620, -50641,
-47662, -44683, -41704, -38725, -35746, -32768, -29789, -26810,
-23831, -20852, -17873, -14894, -11915, -8936, -5957, -2978,
0, 2978, 5957, 8936, 11915, 14894, 17873, 20852,
23831, 26810, 29789, 32768, 35746, 38725, 41704, 44683,
47662, 50641, 53620, 56599, 59578, 62557, 65536, 68514,
71493, 74472, 77451, 80430, 83409, 86388, 89367, 92346,},
{ -91180, -88331, -85481, -82632, -79782, -76933, -74084, -71234,
-68385, -65536, -62686, -59837, -56987, -54138, -51289, -48439,
-45590, -42740, -39891, -37042, -34192, -31343, -28493, -25644,
-22795, -19945, -17096, -14246, -11397, -8548, -5698, -2849,
0, 2849, 5698, 8548, 11397, 14246, 17096, 19945,
22795, 25644, 28493, 31343, 34192, 37042, 39891, 42740,
45590, 48439, 51289, 54138, 56987, 59837, 62686, 65536,
68385, 71234, 74084, 76933, 79782, 82632, 85481, 88331,},
{ -87381, -84650, -81920, -79189, -76458, -73728, -70997, -68266,
-65536, -62805, -60074, -57344, -54613, -51882, -49152, -46421,
-43690, -40960, -38229, -35498, -32768, -30037, -27306, -24576,
-21845, -19114, -16384, -13653, -10922, -8192, -5461, -2730,
0, 2730, 5461, 8192, 10922, 13653, 16384, 19114,
21845, 24576, 27306, 30037, 32768, 35498, 38229, 40960,
43690, 46421, 49152, 51882, 54613, 57344, 60074, 62805,
65536, 68266, 70997, 73728, 76458, 79189, 81920, 84650,},
{ -83886, -81264, -78643, -76021, -73400, -70778, -68157, -65536,
-62914, -60293, -57671, -55050, -52428, -49807, -47185, -44564,
-41943, -39321, -36700, -34078, -31457, -28835, -26214, -23592,
-20971, -18350, -15728, -13107, -10485, -7864, -5242, -2621,
0, 2621, 5242, 7864, 10485, 13107, 15728, 18350,
20971, 23592, 26214, 28835, 31457, 34078, 36700, 39321,
41943, 44564, 47185, 49807, 52428, 55050, 57671, 60293,
62914, 65536, 68157, 70778, 73400, 76021, 78643, 81264,},
{ -80659, -78139, -75618, -73097, -70577, -68056, -65536, -63015,
-60494, -57974, -55453, -52932, -50412, -47891, -45371, -42850,
-40329, -37809, -35288, -32768, -30247, -27726, -25206, -22685,
-20164, -17644, -15123, -12603, -10082, -7561, -5041, -2520,
0, 2520, 5041, 7561, 10082, 12603, 15123, 17644,
20164, 22685, 25206, 27726, 30247, 32768, 35288, 37809,
40329, 42850, 45371, 47891, 50412, 52932, 55453, 57974,
60494, 63015, 65536, 68056, 70577, 73097, 75618, 78139,},
{ -77672, -75245, -72817, -70390, -67963, -65536, -63108, -60681,
-58254, -55826, -53399, -50972, -48545, -46117, -43690, -41263,
-38836, -36408, -33981, -31554, -29127, -26699, -24272, -21845,
-19418, -16990, -14563, -12136, -9709, -7281, -4854, -2427,
0, 2427, 4854, 7281, 9709, 12136, 14563, 16990,
19418, 21845, 24272, 26699, 29127, 31554, 33981, 36408,
38836, 41263, 43690, 46117, 48545, 50972, 53399, 55826,
58254, 60681, 63108, 65536, 67963, 70390, 72817, 75245,},
{ -74898, -72557, -70217, -67876, -65536, -63195, -60854, -58514,
-56173, -53833, -51492, -49152, -46811, -44470, -42130, -39789,
-37449, -35108, -32768, -30427, -28086, -25746, -23405, -21065,
-18724, -16384, -14043, -11702, -9362, -7021, -4681, -2340,
0, 2340, 4681, 7021, 9362, 11702, 14043, 16384,
18724, 21065, 23405, 25746, 28086, 30427, 32768, 35108,
37449, 39789, 42130, 44470, 46811, 49152, 51492, 53833,
56173, 58514, 60854, 63195, 65536, 67876, 70217, 72557,},
{ -72315, -70055, -67795, -65536, -63276, -61016, -58756, -56496,
-54236, -51976, -49716, -47457, -45197, -42937, -40677, -38417,
-36157, -33897, -31638, -29378, -27118, -24858, -22598, -20338,
-18078, -15819, -13559, -11299, -9039, -6779, -4519, -2259,
0, 2259, 4519, 6779, 9039, 11299, 13559, 15819,
18078, 20338, 22598, 24858, 27118, 29378, 31638, 33897,
36157, 38417, 40677, 42937, 45197, 47457, 49716, 51976,
54236, 56496, 58756, 61016, 63276, 65536, 67795, 70055,},
{ -69905, -67720, -65536, -63351, -61166, -58982, -56797, -54613,
-52428, -50244, -48059, -45875, -43690, -41506, -39321, -37137,
-34952, -32768, -30583, -28398, -26214, -24029, -21845, -19660,
-17476, -15291, -13107, -10922, -8738, -6553, -4369, -2184,
0, 2184, 4369, 6553, 8738, 10922, 13107, 15291,
17476, 19660, 21845, 24029, 26214, 28398, 30583, 32768,
34952, 37137, 39321, 41506, 43690, 45875, 48059, 50244,
52428, 54613, 56797, 58982, 61166, 63351, 65536, 67720,},
{ -67650, -65536, -63421, -61307, -59193, -57079, -54965, -52851,
-50737, -48623, -46509, -44395, -42281, -40167, -38053, -35939,
-33825, -31710, -29596, -27482, -25368, -23254, -21140, -19026,
-16912, -14798, -12684, -10570, -8456, -6342, -4228, -2114,
0, 2114, 4228, 6342, 8456, 10570, 12684, 14798,
16912, 19026, 21140, 23254, 25368, 27482, 29596, 31710,
33825, 35939, 38053, 40167, 42281, 44395, 46509, 48623,
50737, 52851, 54965, 57079, 59193, 61307, 63421, 65536,},
};
static long gpoly_pro_enable_mode_ofs;
// Static variables used only inside draw_gpoly().
// These don't really have to be global; but this helps
// in using these inside assembly code
long gpoly_mode;
long factor_ca,factor_ba,factor_cb,factor_chk;
// More variables - made global temporarly to ease assembly rewriting
struct PolyPoint *gploc_point_a,*gploc_point_b,*gploc_point_c;
long gploc_1A4,gploc_1A0;
short gploc_word01,gploc_word02,gploc_word03;
long gploc_198,gploc_194,gploc_18C,gploc_188,gploc_180;
long gploc_pt_ay,gploc_pt_ax,gploc_pt_shax,gploc_170,gploc_16C,gploc_168;
long gploc_pt_by,gploc_pt_bx,gploc_pt_shbx,gploc_158,gploc_154,gploc_150;
long gploc_pt_cy,gploc_pt_cx,gploc_pt_shcx,gploc_140,gploc_13C,gploc_138;
long gploc_12C,gploc_128,gploc_104,gploc_FC,gploc_F8,gploc_F4,gploc_E4,gploc_E0;
long gploc_D8,gploc_D4,gploc_CC,gploc_C8,gploc_C4,gploc_C0,gploc_BC,gploc_B8,gploc_B4,gploc_B0,gploc_AC,gploc_A7,gploc_A8,gploc_A4,gploc_A0,gploc_9C;
long gploc_98,gploc_94,gploc_90,gploc_8C,gploc_88,gploc_84,gploc_80,gploc_7C,gploc_78,gploc_74,gploc_68,gploc_64,gploc_60;
long gploc_5C,gploc_58,gploc_54,gploc_50,gploc_4C,gploc_48,gploc_44,gploc_34,gploc_30,gploc_2C,gploc_28;
/******************************************************************************/
void gpoly_enable_pentium_pro(TbBool state)
{
SYNCMSG("Pentium Pro polygon rendering %s",state?"on":"off");
if (state)
gpoly_pro_enable_mode_ofs = (1<<6);
else
gpoly_pro_enable_mode_ofs = 0;
}
void draw_gpoly_sub1a();
void draw_gpoly_sub1b();
void draw_gpoly_sub1c();
void draw_gpoly_sub2a();
void draw_gpoly_sub2b();
void draw_gpoly_sub2c();
void draw_gpoly_sub3a();
void draw_gpoly_sub3b();
void draw_gpoly_sub4();
void draw_gpoly_sub5();
void draw_gpoly_sub6();
void draw_gpoly_sub7();
void draw_gpoly_sub11();
void draw_gpoly_sub12();
void draw_gpoly_sub13();
void draw_gpoly_sub14();
void draw_gpoly(struct PolyPoint *point_a, struct PolyPoint *point_b, struct PolyPoint *point_c)
{
LOC_poly_screen = poly_screen;
LOC_vec_map = vec_map;
LOC_vec_screen = vec_screen;
LOC_vec_screen_width = vec_screen_width;
LOC_vec_window_width = vec_window_width;
LOC_vec_window_height = vec_window_height;
gpoly_mode = gpoly_pro_enable_mode_ofs + vec_mode;
{ // Check for outranged poly size
// test lengths
int len_bc_x = point_b->X - point_c->X;
if ((len_bc_x < -16383) || (len_bc_x > 16383))
return;
int len_bc_y = point_b->Y - point_c->Y;
if ((len_bc_y < -16383) || (len_bc_y > 16383))
return;
int len_ba_x = point_b->X - point_a->X;
if ((len_ba_x < -16383) || (len_ba_x > 16383))
return;
int len_ca_y = point_c->Y - point_a->Y;
if ((len_ca_y < -16383) || (len_ca_y > 16383))
return;
int len_ca_x = point_c->X - point_a->X;
if ((len_ca_x < -16383) || (len_ca_x > 16383))
return;
int len_ba_y = point_b->Y - point_a->Y;
if ((len_ba_y < -16383) || (len_ba_y > 16383))
return;
// test area
if ((len_ca_x * len_ba_y) - (len_ba_x * len_ca_y) >= 0)
return;
}
long exceeds_window = ((point_a->X | point_b->X | point_c->X) < 0) || (point_a->X > vec_window_width) || (point_b->X > vec_window_width) || (point_c->X > vec_window_width);
{ // Reorder points
int min_y = point_a->Y;
struct PolyPoint* point_tmp;
if (min_y > point_b->Y)
{
min_y = point_b->Y;
point_tmp = point_a;
point_a = point_b;
point_b = point_tmp;
}
if (min_y > point_c->Y)
{
point_tmp = point_a;
point_a = point_c;
point_c = point_tmp;
}
if (point_b->Y > point_c->Y)
{
point_tmp = point_b;
point_b = point_c;
point_c = point_tmp;
}
}
// Check if y coord is same for all of them
if (point_a->Y == point_c->Y)
return;
{
long len_y = point_c->Y - point_a->Y;
long len_x = point_c->X - point_a->X;
if (len_y != 0)
{
if ((len_y < 0) || (len_y > 31) || (len_x < -32) || (len_x > 31))
factor_ca = (len_x << 16) / len_y;
else
factor_ca = gpoly_divtable[len_y][len_x+32];
} else
{
if (len_x < -32)
factor_ca = gpoly_divtable[len_y][-32+32];
else
if (len_x > 31)
factor_ca = gpoly_divtable[len_y][31+32];
else
factor_ca = gpoly_divtable[len_y][len_x+32];
}
len_y = point_b->Y - point_a->Y;
len_x = point_b->X - point_a->X;
if (len_y != 0)
{
if ((len_y < 0) || (len_y > 31) || (len_x < -32) || (len_x > 31))
factor_ba = (len_x << 16) / len_y;
else
factor_ba = gpoly_divtable[len_y][len_x+32];
} else
{
if (len_x < -32)
factor_ba = gpoly_divtable[len_y][-32+32];
else
if (len_x > 31)
factor_ba = gpoly_divtable[len_y][31+32];
else
factor_ba = gpoly_divtable[len_y][len_x+32];
}
len_y = point_c->Y - point_b->Y;
len_x = point_c->X - point_b->X;
if (len_y != 0)
{
if ((len_y < 0) || (len_y > 31) || (len_x < -32) || (len_x > 31))
factor_cb = (len_x << 16) / len_y;
else
factor_cb = gpoly_divtable[len_y][len_x+32];
} else
{
if (len_x < -32)
factor_cb = gpoly_divtable[len_y][-32+32];
else
if (len_x > 31)
factor_cb = gpoly_divtable[len_y][31+32];
else
factor_cb = gpoly_divtable[len_y][len_x+32];
}
len_x = (point_a->X << 16) - (point_b->X << 16);
len_y = (point_b->Y - point_a->Y);
factor_chk = len_y * factor_ca + len_x;
}
gploc_pt_ax = point_a->X;
gploc_pt_ay = point_a->Y;
gploc_pt_shax = point_a->X << 16;
gploc_pt_bx = point_b->X;
gploc_pt_by = point_b->Y;
gploc_pt_shbx = point_b->X << 16;
gploc_pt_cx = point_c->X;
gploc_pt_cy = point_c->Y;
gploc_pt_shcx = point_c->X << 16;
gploc_170 = point_a->S >> 16;
gploc_158 = point_b->S >> 16;
gploc_140 = point_c->S >> 16;
gploc_16C = point_a->U >> 16;
gploc_168 = point_a->V >> 16;
gploc_154 = point_b->U >> 16;
gploc_150 = point_b->V >> 16;
gploc_13C = point_c->U >> 16;
gploc_138 = point_c->V >> 16;
gploc_point_a = point_a;
gploc_point_b = point_b;
gploc_point_c = point_c;
switch (gpoly_mode)
{
case 27:
case 29:
case 31:
case 32:
case 33:
case 34:
case 37:
case 38:
case 91:
case 93:
case 95:
case 96:
case 97:
case 98:
case 101:
case 102:
draw_gpoly_sub1a();
draw_gpoly_sub1b();
draw_gpoly_sub1c();
break;
case 28:
case 30:
case 35:
case 36:
case 39:
case 40:
case 92:
case 94:
case 99:
case 100:
case 103:
case 104:
draw_gpoly_sub2a();
draw_gpoly_sub2b();
draw_gpoly_sub2c();
break;
case 4:
case 16:
case 17:
case 68:
case 80:
case 81:
draw_gpoly_sub3a();
draw_gpoly_sub3b();
break;
case 3:
case 12:
case 13:
case 18:
case 19:
case 22:
case 23:
case 67:
case 76:
case 77:
case 82:
case 83:
case 86:
case 87:
draw_gpoly_sub4();
break;
case 2:
case 66:
draw_gpoly_sub5();
break;
case 5:
case 6:
case 20:
case 21:
case 24:
case 25:
case 70:
case 84:
case 85:
case 88:
case 89:
draw_gpoly_sub6();
break;
case 69:
draw_gpoly_sub7();
break;
case 43:
case 44:
case 45:
case 46:
case 47:
case 48:
case 49:
case 50:
case 51:
case 52:
case 53:
case 54:
case 55:
case 56:
case 57:
case 58:
case 59:
case 60:
case 61:
case 62:
case 63:
return;
}
// End of first switch - now the second
switch (gpoly_mode)
{
case 5:
if (exceeds_window)
{
gploc_104 = LOC_vec_screen_width;
gploc_180 = 2;
gploc_60 = gploc_1A4;
gploc_CC = gploc_A4;
gploc_C4 = gploc_A0;
gploc_C8 = gploc_9C;
if (factor_chk < 0)
{
gploc_12C = factor_ca;
gploc_128 = factor_ba;
}
else
{
gploc_12C = factor_ba;
gploc_128 = factor_ca;
}
draw_gpoly_sub11();
} else // not exceeds_window
{
draw_gpoly_sub12();
}
break;
case 64+5: //Pentium pro index + 5
if (exceeds_window)
{
gploc_104 = LOC_vec_screen_width;
gploc_180 = 2;
gploc_60 = gploc_68;
gploc_CC = gploc_A4;
gploc_C4 = gploc_A0;
if (factor_chk < 0)
{
gploc_12C = factor_ca;
gploc_128 = factor_ba;
} else
{
gploc_12C = factor_ba;
gploc_128 = factor_ca;
}
draw_gpoly_sub13();
} else // not exceeds_window
{
gploc_104 = LOC_vec_screen_width;
gploc_180 = 2;
gploc_60 = gploc_68;
gploc_CC = gploc_A4;
gploc_C4 = gploc_A0;
if (factor_chk < 0)
{
gploc_12C = factor_ca;
gploc_128 = factor_ba;
} else
{
gploc_12C = factor_ba;
gploc_128 = factor_ca;
}
draw_gpoly_sub14();
}
break;
}
}
static void unk_update_gpoly1_tri8a(long * vout0, long * vout1, long vinp2, long vin0, long delta)
{
long tmp1 = (vin0 << 16);
long tmp2 = (vin0 >> 16);
tmp1 += (unsigned char)(vinp2);
if ( (char)(vinp2) < 0 )
{
long tmp3 = (unsigned int)tmp1 < delta;
tmp1 -= delta;
tmp2 = (tmp2 & ~0xff) | ((tmp2 - tmp3) & 0xff);
}
*vout1 = tmp1;
*vout0 = tmp2;
}
static void unk_update_gpoly1_tri16a(long * vout0, long * vout1, long vinp2, long vin0, long delta)
{
long tmp1 = (vin0 << 16);
long tmp2 = (vin0 >> 16);
tmp1 += (unsigned short)(vinp2);
if ( (short)(vinp2) < 0 )
{
long tmp3 = (unsigned int)tmp1 < delta;
tmp1 -= delta;
tmp2 = (tmp2 & ~0xff) | ((tmp2 - tmp3) & 0xff);
}
*vout1 = tmp1;
*vout0 = tmp2;
}
static void unk_update_gpoly1_tri8b(long * vout0, long * vout1, long * vout2, long vin0, long vin1)
{
*vout2 = (vin1 << 16);
long tmp1 = (vin0 << 16);
tmp1 += ((unsigned int)vin1 >> 16) & 0xff;
*vout1 = tmp1;
*vout0 = (unsigned int)(vin0 << 8) >> 24 << 8;
}
static void unk_update_gpoly1_tri16b(long * vout0, long * vout1, long * vout2, long vin0, long vin1, long vin2)
{
long tmp1 = (vin1 << 16);
tmp1 += ((unsigned int)vin2 >> 8) & 0xffff;
*vout2 = tmp1;
tmp1 = (vin0 << 16);
tmp1 += ((unsigned int)vin1 >> 16) & 0xff;
*vout1 = tmp1;
tmp1 = (unsigned int)(vin0 << 8) >> 24 << 8;
tmp1 += (vin2) & 0xff;
*vout0 = tmp1;
}
void draw_gpoly_sub1a()
{
#if __GNUC__
asm volatile (" \
pusha \n \
movl _gploc_pt_bx,%%esi\n \
movl _factor_chk,%%edi\n \
orl %%edi,%%edi\n \
subl $0,%%esi\n \
addl $0,%%esi\n \
movl _gploc_pt_ax,%%eax\n \
subl %%eax,%%esi\n \
movl _gploc_pt_cx,%%edi\n \
subl %%eax,%%edi\n \
movl _gploc_pt_ay,%%eax\n \
movl _gploc_pt_by,%%ebx\n \
subl %%eax,%%ebx\n \
movl _gploc_pt_cy,%%ecx\n \
subl %%eax,%%ecx\n \
movl %%ecx,%%eax\n \
imull %%esi,%%ecx\n \
movl _factor_chk,%%ebp\n \
orl %%ebp,%%ebp\n \
js gpo_loc_0532\n \
subl %%eax,%%ecx\n \
subl %%eax,%%ecx\n \
\n \
gpo_loc_0532: # 33C\n \
addl %%eax,%%ecx\n \
imull %%edi,%%ebx\n \
subl %%ecx,%%ebx\n \
jz gpo_loc_05B8\n \
xorl %%edx,%%edx\n \
movl $0x7FFFFFFF,%%eax\n \
idivl %%ebx\n \
movl %%eax,%%ebp\n \
movl _gploc_pt_ay,%%eax\n \
movl _gploc_pt_cy,%%esi\n \
subl %%eax,%%esi\n \
movl _gploc_pt_by,%%edi\n \
subl %%eax,%%edi\n \
movl %%ebp,%%eax\n \
movl _gploc_16C,%%edx\n \
movl _gploc_13C,%%ebx\n \
subl %%edx,%%ebx\n \
movl _gploc_154,%%ecx\n \
subl %%edx,%%ecx\n \
imull %%esi,%%ecx\n \
imull %%edi,%%ebx\n \
subl %%ecx,%%ebx\n \
imull %%ebx\n \
shll $1,%%eax\n \
rcll $1,%%edx\n \
movw %%dx,%%ax\n \
roll $0x10,%%eax\n \
jns gpo_loc_057F\n \
incl %%eax\n \
\n \
gpo_loc_057F: # 38C\n \
movl %%eax,_gploc_B0\n \
movl %%ebp,%%eax\n \
movl _gploc_168,%%edx\n \
movl _gploc_138,%%ebx\n \
subl %%edx,%%ebx\n \
movl _gploc_150,%%ecx\n \
subl %%edx,%%ecx\n \
imull %%esi,%%ecx\n \
imull %%edi,%%ebx\n \
subl %%ecx,%%ebx\n \
imull %%ebx\n \
shll $1,%%eax\n \
rcll $1,%%edx\n \
movw %%dx,%%ax\n \
roll $0x10,%%eax\n \
jns gpo_loc_05AF\n \
incl %%eax\n \
\n \
gpo_loc_05AF: # 3BC\n \
movl %%eax,_gploc_AC\n \
jmp gpo_loc_05C8\n \
# ---------------------------------------------------------------------------\n \
\n \
gpo_loc_05B8: # 34\n \
xorl %%eax,%%eax\n \
movl %%eax,_gploc_B0\n \
movl %%eax,_gploc_AC\n \
\n \
gpo_loc_05C8: # 3C6\n \
popa \n \
" : : : "memory", "cc");
#endif
}
void draw_gpoly_sub1b()
{
#if __GNUC__
asm volatile (" \
pusha \n \
movl _factor_chk,%%esi\n \
orl %%esi,%%esi\n \
js gpo_loc_0715\n \
movl _gploc_pt_by,%%ecx\n \
subl _gploc_pt_ay,%%ecx\n \
cmpl $0x0FF,%%ecx\n \
jg gpo_loc_05ED\n \
movl _gpoly_reptable(,%%ecx,4),%%ebx\n \
jmp gpo_loc_05FB\n \
# ---------------------------------------------------------------------------\n \
\n \
gpo_loc_05ED: # 3F2\n \
movl $0,%%edx\n \
movl $0x7FFFFFFF,%%eax\n \
idivl %%ecx\n \
movl %%eax,%%ebx\n \
\n \
gpo_loc_05FB: # 3FB\n \
movl _gploc_154,%%eax\n \
subl _gploc_16C,%%eax\n \
shll $1,%%eax\n \
imull %%ebx\n \
movw %%dx,%%ax\n \
roll $0x10,%%eax\n \
jns gpo_loc_0610\n \
incl %%eax\n \
\n \
gpo_loc_0610: # 41D\n \
movl %%eax,_gploc_194\n \
movl _gploc_150,%%eax\n \
subl _gploc_168,%%eax\n \
shll $1,%%eax\n \
imull %%ebx\n \
movw %%dx,%%ax\n \
roll $0x10,%%eax\n \
jns gpo_loc_0629\n \
incl %%eax\n \
\n \
gpo_loc_0629: # 436\n \
movl %%eax,_gploc_188\n \
movl _gploc_pt_cy,%%ecx\n \
subl _gploc_pt_by,%%ecx\n \
cmpl $0x0FF,%%ecx\n \
jg gpo_loc_0646\n \
movl _gpoly_reptable(,%%ecx,4),%%ebx\n \
jmp gpo_loc_0654\n \
# ---------------------------------------------------------------------------\n \
\n \
gpo_loc_0646: # 44B\n \
movl $0,%%edx\n \
movl $0x7FFFFFFF,%%eax\n \
idivl %%ecx\n \
movl %%eax,%%ebx\n \
\n \
gpo_loc_0654: # 45\n \
movl _gploc_13C,%%eax\n \
subl _gploc_154,%%eax\n \
shll $1,%%eax\n \
imull %%ebx\n \
movw %%dx,%%ax\n \
roll $0x10,%%eax\n \
jns gpo_loc_0669\n \
incl %%eax\n \
\n \
gpo_loc_0669: # 476\n \
movl %%eax,_gploc_198\n \
movl _gploc_138,%%eax\n \
subl _gploc_150,%%eax\n \
shll $1,%%eax\n \
imull %%ebx\n \
movw %%dx,%%ax\n \
roll $0x10,%%eax\n \
jns gpo_loc_0682\n \
incl %%eax\n \
\n \
gpo_loc_0682: # 48\n \
movl %%eax,_gploc_18C\n \
movl _gploc_point_a,%%eax\n \
movl _gploc_B0,%%ebx\n \
imull %%ebx\n \
movw %%dx,%%ax\n \
roll $0x10,%%eax\n \
subl %%eax,_gploc_194\n \
movl _gploc_point_a,%%eax\n \
movl _gploc_AC,%%ebx\n \
imull %%ebx\n \
movw %%dx,%%ax\n \
roll $0x10,%%eax\n \
subl %%eax,_gploc_188\n \
movl _gploc_point_a,%%eax\n \
movl _gploc_A8,%%ebx\n \
imull %%ebx\n \
movw %%dx,%%ax\n \
roll $0x10,%%eax\n \
subl %%eax,_gploc_point_c\n \
movl _gploc_point_b,%%eax\n \
movl _gploc_B0,%%ebx\n \
imull %%ebx\n \
movw %%dx,%%ax\n \
roll $0x10,%%eax\n \
subl %%eax,_gploc_198\n \
movl _gploc_point_b,%%eax\n \
movl _gploc_AC,%%ebx\n \
imull %%ebx\n \
movw %%dx,%%ax\n \
roll $0x10,%%eax\n \
subl %%eax,_gploc_18C\n \
movl _gploc_point_b,%%eax\n \
movl _gploc_A8,%%ebx\n \
imull %%ebx\n \
movw %%dx,%%ax\n \
roll $0x10,%%eax\n \
subl %%eax,_gploc_1A0\n \
jmp gpo_loc_07B0\n \
# ---------------------------------------------------------------------------\n \
\n \
gpo_loc_0715: # 3DE\n \
movl _gploc_pt_cy,%%ecx\n \
subl _gploc_pt_ay,%%ecx\n \
cmpl $0x0FF,%%ecx\n \
jg gpo_loc_072E\n \
movl _gpoly_reptable(,%%ecx,4),%%ebx\n \
jmp gpo_loc_073C\n \
# ---------------------------------------------------------------------------\n \
\n \
gpo_loc_072E: # 533\n \
movl $0,%%edx\n \
movl $0x7FFFFFFF,%%eax\n \
idivl %%ecx\n \
movl %%eax,%%ebx\n \
\n \
gpo_loc_073C: # 53C\n \
movl _gploc_13C,%%eax\n \
subl _gploc_16C,%%eax\n \
shll $1,%%eax\n \
imull %%ebx\n \
movw %%dx,%%ax\n \
roll $0x10,%%eax\n \
jns gpo_loc_0751\n \
incl %%eax\n \
\n \
gpo_loc_0751: # 55E\n \
movl %%eax,_gploc_194\n \
movl _gploc_138,%%eax\n \
subl _gploc_168,%%eax\n \
shll $1,%%eax\n \
imull %%ebx\n \
movw %%dx,%%ax\n \
roll $0x10,%%eax\n \
jns gpo_loc_076A\n \
incl %%eax\n \
\n \
gpo_loc_076A: # 577\n \
movl %%eax,_gploc_188\n \
movl _factor_ca,%%eax\n \
movl _gploc_B0,%%ebx\n \
imull %%ebx\n \