ReactOS 0.4.15-dev-7942-gd23573b
splitarcs.cc
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1/*
2** License Applicability. Except to the extent portions of this file are
3** made subject to an alternative license as permitted in the SGI Free
4** Software License B, Version 1.1 (the "License"), the contents of this
5** file are subject only to the provisions of the License. You may not use
6** this file except in compliance with the License. You may obtain a copy
7** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
8** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
9**
10** http://oss.sgi.com/projects/FreeB
11**
12** Note that, as provided in the License, the Software is distributed on an
13** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
14** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
15** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
16** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
17**
18** Original Code. The Original Code is: OpenGL Sample Implementation,
19** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
20** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
21** Copyright in any portions created by third parties is as indicated
22** elsewhere herein. All Rights Reserved.
23**
24** Additional Notice Provisions: The application programming interfaces
25** established by SGI in conjunction with the Original Code are The
26** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
27** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
28** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
29** Window System(R) (Version 1.3), released October 19, 1998. This software
30** was created using the OpenGL(R) version 1.2.1 Sample Implementation
31** published by SGI, but has not been independently verified as being
32** compliant with the OpenGL(R) version 1.2.1 Specification.
33*/
34
35/*
36 * splitarcs.c++
37 *
38 */
39
40//#include "glimports.h"
41//#include "myassert.h"
42//#include "mysetjmp.h"
43//#include "mystdio.h"
44#include "subdivider.h"
45#include "arcsorter.h"
46//#include "arc.h"
47//#include "bin.h"
48
49/* local preprocessor definitions */
50#define MAXARCS 10
51
52/*----------------------------------------------------------------------------
53 * Subdivider::split - split trim regions in source bin by line (param == value).
54 *----------------------------------------------------------------------------
55 */
56
57void
59{
60 Bin intersections, unknown;
61
62 partition( bin, left, intersections, right, unknown, param, value );
63
64 int count = intersections.numarcs();
65 if( count % 2 ) {
66#ifndef NDEBUG
67 left.show( "left" );
68 intersections.show( "intersections" );
69 right.show( "right" );
70#endif
71 ::mylongjmp( jumpbuffer, 29 );
72 }
73
74 Arc_ptr arclist[MAXARCS], *list;
75 if( count >= MAXARCS ) {
76 list = new Arc_ptr[count];
77 } else {
78 list = arclist;
79 }
80
81 Arc_ptr jarc, *last, *lptr;
82 for( last = list; (jarc=intersections.removearc()) != NULL; last++ )
83 *last = jarc;
84
85 if( param == 0 ) { /* sort into increasing t order */
86 ArcSdirSorter sorter(*this);
87 sorter.qsort( list, count );
88
89 //::qsort ((void *)list, count, sizeof(Arc_ptr), (cmpfunc)compare_s);
90 for( lptr=list; lptr<last; lptr+=2 )
91 check_s ( lptr[0], lptr[1] );
92 for( lptr=list; lptr<last; lptr+=2 )
93 join_s ( left, right, lptr[0], lptr[1] );
94 for( lptr=list; lptr != last; lptr++ ) {
95 if( ((*lptr)->head()[0] <= value) && ((*lptr)->tail()[0] <= value) )
96 left.addarc( *lptr );
97 else
98 right.addarc( *lptr );
99 }
100 } else { /* sort into decreasing s order */
101 ArcTdirSorter sorter(*this);
102 sorter.qsort( list, count );
103 //::qsort ((void *)list, count, sizeof(Arc_ptr), (cmpfunc)compare_t);
104 for( lptr=list; lptr<last; lptr+=2 )
105 check_t ( lptr[0], lptr[1] );
106 for( lptr=list; lptr<last; lptr+=2 )
107 join_t ( left, right, lptr[0], lptr[1] );
108 for( lptr=list; lptr != last; lptr++ ) {
109 if( ((*lptr)->head()[1] <= value) && ((*lptr)->tail()[1] <= value) )
110 left.addarc( *lptr );
111 else
112 right.addarc( *lptr );
113 }
114 }
115
116 if( list != arclist ) delete[] list;
117 unknown.adopt();
118}
119
120
121void
123{
124 assert( jarc1->check( ) != 0 );
125 assert( jarc2->check( ) != 0 );
126 assert( jarc1->next->check( ) != 0 );
127 assert( jarc2->next->check( ) != 0 );
128 assert( jarc1 != jarc2 );
129
130 /* XXX - if these assertions fail, it is due to user error or
131 undersampling */
132 if( ! ( jarc1->tail()[0] < (jarc1)->head()[0] ) ) {
133#ifndef NDEBUG
134 _glu_dprintf( "s difference %f\n", (jarc1)->tail()[0] - (jarc1)->head()[0] );
135#endif
136 ::mylongjmp( jumpbuffer, 28 );
137 }
138
139 if( ! ( jarc2->tail()[0] > (jarc2)->head()[0] ) ) {
140#ifndef NDEBUG
141 _glu_dprintf( "s difference %f\n", (jarc2)->tail()[0] - (jarc2)->head()[0] );
142#endif
143 ::mylongjmp( jumpbuffer, 28 );
144 }
145}
146
147inline void
149{
150 up->nuid = down->nuid = 0; // XXX
151
152 up->next = jarc2;
153 down->next = jarc1;
154 up->prev = jarc1->prev;
155 down->prev = jarc2->prev;
156
157 down->next->prev = down;
158 up->next->prev = up;
159 down->prev->next = down;
160 up->prev->next = up;
161}
162
163inline void
165{
166 Arc_ptr tmp = jarc2->prev;
167 jarc2->prev = jarc1->prev;
168 jarc1->prev = tmp;
169 jarc2->prev->next = jarc2;
170 jarc1->prev->next = jarc1;
171}
172
173
174/*----------------------------------------------------------------------------
175 * join - add a pair of oppositely directed jordan arcs between two arcs
176 *----------------------------------------------------------------------------
177 */
178
179void
181{
182 assert( jarc1->check( ) != 0);
183 assert( jarc2->check( ) != 0);
184 assert( jarc1 != jarc2 );
185
186 if( ! jarc1->getitail() )
187 jarc1 = jarc1->next;
188
189 if( ! jarc2->getitail() )
190 jarc2 = jarc2->next;
191
192 REAL s = jarc1->tail()[0];
193 REAL t1 = jarc1->tail()[1];
194 REAL t2 = jarc2->tail()[1];
195
196 if( t1 == t2 ) {
197 simple_link( jarc1, jarc2 );
198 } else {
199 Arc_ptr newright = new(arcpool) Arc( arc_right, 0 );
200 Arc_ptr newleft = new(arcpool) Arc( arc_left, 0 );
201 assert( t1 < t2 );
202 if( isBezierArcType() ) {
203 arctessellator.bezier( newright, s, s, t1, t2 );
204 arctessellator.bezier( newleft, s, s, t2, t1 );
205 } else {
206 arctessellator.pwl_right( newright, s, t1, t2, stepsizes[0] );
207 arctessellator.pwl_left( newleft, s, t2, t1, stepsizes[2] );
208 }
209 link( jarc1, jarc2, newright, newleft );
210 left.addarc( newright );
211 right.addarc( newleft );
212 }
213
214 assert( jarc1->check( ) != 0 );
215 assert( jarc2->check( ) != 0 );
216 assert( jarc1->next->check( ) != 0);
217 assert( jarc2->next->check( ) != 0);
218}
219
220void
222{
223 assert( jarc1->check( ) != 0 );
224 assert( jarc2->check( ) != 0 );
225 assert( jarc1->next->check( ) != 0 );
226 assert( jarc2->next->check( ) != 0 );
227 assert( jarc1 != jarc2 );
228
229 /* XXX - if these assertions fail, it is due to user error or
230 undersampling */
231 if( ! ( jarc1->tail()[1] < (jarc1)->head()[1] ) ) {
232#ifndef NDEBUG
233 _glu_dprintf( "t difference %f\n", jarc1->tail()[1] - (jarc1)->head()[1] );
234#endif
235 ::mylongjmp( jumpbuffer, 28 );
236 }
237
238 if( ! ( jarc2->tail()[1] > (jarc2)->head()[1] ) ) {
239#ifndef NDEBUG
240 _glu_dprintf( "t difference %f\n", jarc2->tail()[1] - (jarc2)->head()[1] );
241#endif
242 ::mylongjmp( jumpbuffer, 28 );
243 }
244}
245
246/*----------------------------------------------------------------------------
247 * join_t - add a pair of oppositely directed jordan arcs between two arcs
248 *----------------------------------------------------------------------------
249 */
250
251void
253{
254 assert( jarc1->check( ) != 0 );
255 assert( jarc2->check( ) != 0 );
256 assert( jarc1->next->check( ) != 0 );
257 assert( jarc2->next->check( ) != 0 );
258 assert( jarc1 != jarc2 );
259
260 if( ! jarc1->getitail() )
261 jarc1 = jarc1->next;
262
263 if( ! jarc2->getitail() )
264 jarc2 = jarc2->next;
265
266 REAL s1 = jarc1->tail()[0];
267 REAL s2 = jarc2->tail()[0];
268 REAL t = jarc1->tail()[1];
269
270 if( s1 == s2 ) {
271 simple_link( jarc1, jarc2 );
272 } else {
273 Arc_ptr newtop = new(arcpool) Arc( arc_top, 0 );
274 Arc_ptr newbot = new(arcpool) Arc( arc_bottom, 0 );
275 assert( s1 > s2 );
276 if( isBezierArcType() ) {
277 arctessellator.bezier( newtop, s1, s2, t, t );
278 arctessellator.bezier( newbot, s2, s1, t, t );
279 } else {
280 arctessellator.pwl_top( newtop, t, s1, s2, stepsizes[1] );
281 arctessellator.pwl_bottom( newbot, t, s2, s1, stepsizes[3] );
282 }
283 link( jarc1, jarc2, newtop, newbot );
284 bottom.addarc( newtop );
285 top.addarc( newbot );
286 }
287
288 assert( jarc1->check( ) != 0 );
289 assert( jarc2->check( ) != 0 );
290 assert( jarc1->next->check( ) != 0 );
291 assert( jarc2->next->check( ) != 0 );
292}
293
struct outqueuenode * tail
Definition: adnsresfilter.c:66
struct outqueuenode * head
Definition: adnsresfilter.c:66
void qsort(Arc **a, int n)
Definition: arcsorter.cc:60
void pwl_right(Arc_ptr, REAL, REAL, REAL, REAL)
Definition: arctess.cc:155
void pwl_top(Arc_ptr, REAL, REAL, REAL, REAL)
Definition: arctess.cc:185
void pwl_bottom(Arc_ptr, REAL, REAL, REAL, REAL)
Definition: arctess.cc:214
void bezier(Arc_ptr, REAL, REAL, REAL, REAL)
Definition: arctess.cc:79
void pwl_left(Arc_ptr, REAL, REAL, REAL, REAL)
Definition: arctess.cc:125
Definition: arc.h:55
Definition: bin.h:44
Arc_ptr removearc(void)
Definition: bin.h:82
int numarcs(void)
Definition: bin.cc:84
void show(const char *)
Definition: bin.cc:122
void check_t(Arc_ptr, Arc_ptr)
Definition: splitarcs.cc:221
void join_s(Bin &, Bin &, Arc_ptr, Arc_ptr)
Definition: splitarcs.cc:180
ArcTessellator arctessellator
Definition: subdivider.h:113
REAL stepsizes[4]
Definition: subdivider.h:132
void check_s(Arc_ptr, Arc_ptr)
Definition: splitarcs.cc:122
void partition(Bin &, Bin &, Bin &, Bin &, Bin &, int, REAL)
Definition: intersect.cc:61
int isBezierArcType(void)
Definition: subdivider.h:158
JumpBuffer * jumpbuffer
Definition: subdivider.h:119
Pool arcpool
Definition: subdivider.h:114
void link(Arc_ptr, Arc_ptr, Arc_ptr, Arc_ptr)
Definition: splitarcs.cc:148
void join_t(Bin &, Bin &, Arc_ptr, Arc_ptr)
Definition: splitarcs.cc:252
void simple_link(Arc_ptr, Arc_ptr)
Definition: splitarcs.cc:164
void split(Bin &, Bin &, Bin &, int, REAL)
Definition: splitarcs.cc:58
Definition: list.h:37
const WCHAR * link
Definition: db.cpp:997
#define NULL
Definition: types.h:112
class Arc * Arc_ptr
Definition: arc.h:50
@ arc_left
Definition: arc.h:52
@ arc_bottom
Definition: arc.h:52
@ arc_top
Definition: arc.h:52
@ arc_right
Definition: arc.h:52
float REAL
Definition: types.h:41
static WCHAR unknown[MAX_STRING_RESOURCE_LEN]
Definition: object.c:1605
#define assert(x)
Definition: debug.h:53
GLdouble s
Definition: gl.h:2039
GLuint GLuint GLsizei count
Definition: gl.h:1545
GLdouble GLdouble t
Definition: gl.h:2047
GLdouble GLdouble GLdouble GLdouble top
Definition: glext.h:10859
GLdouble GLdouble right
Definition: glext.h:10859
GLint left
Definition: glext.h:7726
GLint GLint bottom
Definition: glext.h:7726
GLfloat param
Definition: glext.h:5796
#define up(mutex)
Definition: glue.h:30
#define down(mutex)
Definition: glue.h:29
struct S1 s1
struct S2 s2
static UINT UINT last
Definition: font.c:45
static struct _PeImage bin
#define list
Definition: rosglue.h:35
#define MAXARCS
Definition: splitarcs.cc:50
Definition: pdh_main.c:94