summaryrefslogtreecommitdiff
path: root/Build/source/texk/ps2pkm/regions.h
blob: 2d0e6b7968e02599c0f715ff0e05333a061b07a0 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
/* $XConsortium: regions.h,v 1.2 91/10/10 11:19:06 rws Exp $ */
/* Copyright International Business Machines, Corp. 1991
 * All Rights Reserved
 * Copyright Lexmark International, Inc. 1991
 * All Rights Reserved
 *
 * License to use, copy, modify, and distribute this software and its
 * documentation for any purpose and without fee is hereby granted,
 * provided that the above copyright notice appear in all copies and that
 * both that copyright notice and this permission notice appear in
 * supporting documentation, and that the name of IBM or Lexmark not be
 * used in advertising or publicity pertaining to distribution of the
 * software without specific, written prior permission.
 *
 * IBM AND LEXMARK PROVIDE THIS SOFTWARE "AS IS", WITHOUT ANY WARRANTIES OF
 * ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO ANY
 * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
 * AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.  THE ENTIRE RISK AS TO THE
 * QUALITY AND PERFORMANCE OF THE SOFTWARE, INCLUDING ANY DUTY TO SUPPORT
 * OR MAINTAIN, BELONGS TO THE LICENSEE.  SHOULD ANY PORTION OF THE
 * SOFTWARE PROVE DEFECTIVE, THE LICENSEE (NOT IBM OR LEXMARK) ASSUMES THE
 * ENTIRE COST OF ALL SERVICING, REPAIR AND CORRECTION.  IN NO EVENT SHALL
 * IBM OR LEXMARK BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS
 * ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
 * THIS SOFTWARE.
 */
/*SHARED*/
 
#define   Interior(p,rule)        t1_Interior(p,rule)
#define   Union(a1,a2)            t1_Union(a1,a2)
#define   Intersect(a1,a2)        t1_Intersect(a1,a2)
#define   Complement(area)        t1_Complement(area)
#define   Overlap(a1,a2)          t1_OverLap(a1,a2)
 
struct region *t1_Interior(); /* returns the interior of a closed path        */
struct region *t1_Union();   /* set union of paths or regions                */
struct region *t1_Intersect();  /* set intersection of regions                */
struct region *t1_Complement();  /* complement of a region                    */
int t1_Overlap();             /* returns a Boolean; TRUE if regions overlap   */
 
#define   INFINITY    t1_Infinity
 
/*END SHARED*/
/*SHARED*/
 
#define   ChangeDirection(type,R,x,y,dy)  t1_ChangeDirection(type,R,x,y,dy)
 
void t1_ChangeDirection();    /* called when we change direction in Y         */
#define   CD_FIRST         -1  /* enumeration of ChangeDirection type       */
#define   CD_CONTINUE       0  /* enumeration of ChangeDirection type        */
#define   CD_LAST           1  /* enumeration of ChangeDirection type        */
 
#define    MoreWorkArea(R,x1,y1,x2,y2)     t1_MoreWorkArea(R,x1,y1,x2,y2)
#define    KillRegion(area)   t1_KillRegion(area)
#define    CopyRegion(area)   t1_CopyRegion(area)
#define    BoxClip(R,xmin,ymin,xmax,ymax)  t1_BoxClip(R,xmin,ymin,xmax,ymax)
#define    SortSwath(a,p,f)   t1_SortSwath(a,p,f)
#define    SwathUnion(b,e)    t1_SwathUnion(b,e)
#define    RegionBounds(r)    t1_RegionBounds(r)
#define    CoerceRegion(p)    t1_CoerceRegion(p)
#define    MoveEdges(R,dx,dy) t1_MoveEdges(R,dx,dy)
#define    UnJumble(R)        t1_UnJumble(R)
 
void t1_MoreWorkArea();       /* get longer edge list for stepping            */
struct region *t1_CopyRegion();  /* duplicate a region                       */
void t1_KillRegion();         /* destroy a region                             */
struct region *t1_BoxClip();  /* clip a region to a rectangle                 */
struct edgelist *t1_SortSwath();  /* sort edges onto growing edge list        */
struct edgelist *t1_SwathUnion();  /* 'union' two edges into a swath          */
struct segment *t1_RegionBounds();  /* returns bounding box of a region       */
struct region *t1_CoerceRegion();  /* force text to become a true region      */
void t1_MoveEdges();          /* moves the edge values in a region            */
void t1_UnJumble();           /* sort the edges and reset the jumbled flag    */
 
/*END SHARED*/
/*SHARED*/
 
#define GOING_TO(R, x1, y1, x2, y2, dy) { \
   if (dy < 0) { \
      if (R->lastdy >= 0) \
          ChangeDirection(CD_CONTINUE, R, x1, y1, dy); \
      if (y2 < R->edgeYstop) \
          MoreWorkArea(R, x1, y1, x2, y2); \
   } \
   else if (dy > 0) { \
      if (R->lastdy <= 0) \
          ChangeDirection(CD_CONTINUE, R, x1, y1, dy); \
      if (y2 > R->edgeYstop) \
          MoreWorkArea(R, x1, y1, x2, y2); \
   } \
   else /* dy == 0 */ ChangeDirection(CD_CONTINUE, R, x1, y1, dy); \
   if (x2 < R->edgexmin) R->edgexmin = x2; \
   else if (x2 > R->edgexmax) R->edgexmax = x2; \
}
 
 
#define    MINPEL    (-1<<(8*sizeof(pel)-1))  /* smallest value fitting in a pel */
#define    MAXPEL    ((1<<(8*sizeof(pel)-1))-1)/* largest value fitting in a pel */
 
/*
The "Unique"-type macro is different (unique?) for regions, because some
regions structures are shared among several objects, and might have
to be made unique for that reason (i.e., references > 1).
*/
 
#define    ConsumeRegion(R)   MAKECONSUME(R,KillRegion(R))
#define    UniqueRegion(R)    MAKEUNIQUE(R,CopyRegion(R))
 
 
/*END SHARED*/
/*SHARED*/
 
struct region {
       XOBJ_COMMON           /* xobject common data define 3-26-91 PNM    */
                             /* type = REGIONTYPE                         */
       struct fractpoint origin;    /* beginning handle:  X,Y origin of region      */
       struct fractpoint ending;    /* ending handle:  X,Y change after painting region */
       pel xmin,ymin;        /* minimum X,Y of region                        */
       pel xmax,ymax;        /* mat1_mum X,Y of region                        */
       struct edgelist *anchor;  /* list of edges that bound the region      */
       struct picture *thresholded;  /* region defined by thresholded picture*/
/*
Note that the ending handle and the bounding box values are stored
relative to 'origin'.
 
The above elements describe a region.  The following elements are
scratchpad areas used while the region is being built:
*/
       fractpel lastdy;      /* direction of last segment                    */
       fractpel firstx,firsty;    /* starting point of current edge          */
       fractpel edgexmin,edgexmax;  /* x extent of current edge              */
       struct edgelist *lastedge,*firstedge;  /* last and first edges in subpath */
       pel *edge;            /* pointer to array of X values for edge        */
       fractpel edgeYstop;   /* Y value where 'edges' array ends             */
#if defined(HAVE_PROTOTYPES) 
       void (*newedgefcn)(struct region *, fractpel, fractpel,
			  fractpel, fractpel, int);  /* function to use when
							building a new edge */
#else
       int (*newedgefcn)();  /* function to use when building a new edge     */
#endif
       struct strokeinfo *strokeinfo;  /* scratchpad info during stroking only */
} ;
/*
The ISCOMPLEMENT flag indicates the region is reversed--it is the
"outside" of the nominal region.
*/
#define   ISCOMPLEMENT(flag)   ((flag)&0x80)
/*
The ISJUMBLED flag indicates the region is not sorted top-to-bottom.
*/
#define   ISJUMBLED(flag)      ((flag)&0x40)
/*
The ISINFINITE flag allows a quick check for an INFINITE region, which
is frequently intersected.
*/
#define   ISINFINITE(flag)     ((flag)&0x20)
 
/*END SHARED*/
/*SHARED*/
 
#define   ISRECTANGULAR(flag)  ((flag)&0x08)
 
/*END SHARED*/
/*SHARED*/
 
#define  EmptyRegion   t1_EmptyRegion
 
/*END SHARED*/
/*SHARED*/
 
struct edgelist {
       XOBJ_COMMON          /* xobject common data define 3-26-91 PNM        */
                            /* type = EDGETYPE                               */
       struct edgelist *link;  /* pointer to next in linked list             */
       struct edgelist *subpath;  /* informational link for "same subpath"   */
       pel xmin,xmax;        /* range of edge in X                           */
       pel ymin,ymax;        /* range of edge in Y                           */
       pel *xvalues;         /* pointer to ymax-ymin X values                */
} ;
/*
The end of the list is marked by either "link" being NULL, or by
ymin == ymax.  See :hdref refid=discard..  We define the VALIDEDGE
predicate to test for the opposite of these conditions:
*/
 
#define   VALIDEDGE(p)    ((p)!=NULL&&(p)->ymin<(p)->ymax)
 
/*END SHARED*/
/*SHARED*/
 
#define   ISDOWN(f)       ((f)&0x80)
 
#define   ISAMBIGUOUS(f)  ((f)&0x40)
 
/*END SHARED*/
/*SHARED*/
 
/*
Interior() rule enumerations:
*/
#define   WINDINGRULE -2
#define   EVENODDRULE -3
 
#define   CONTINUITY  0x80   /* can be added to above rules; e.g. WINDINGRULE+CONTINUITY */
 
/*END SHARED*/