| 1 |
#ifndef lint |
| 2 |
static const char RCSid[] = "$Id: metacalls.c,v 1.4 2004/03/16 15:55:27 greg Exp $"; |
| 3 |
#endif |
| 4 |
/* |
| 5 |
* metacalls.c - functional interface to metafile. |
| 6 |
* |
| 7 |
* 2/24/86 |
| 8 |
*/ |
| 9 |
|
| 10 |
#include "meta.h" |
| 11 |
#include "plot.h" |
| 12 |
|
| 13 |
|
| 14 |
#define RIGHT 0 |
| 15 |
#define UP 1 |
| 16 |
#define LEFT 2 |
| 17 |
#define DOWN 3 |
| 18 |
|
| 19 |
#define pflush() if (inpoly) closepoly() |
| 20 |
|
| 21 |
#define putdec(v) if (v) decival(v); else *cap++ = '0'; |
| 22 |
|
| 23 |
|
| 24 |
static int curx = 0; |
| 25 |
static int cury = 0; |
| 26 |
static int cura0 = 0; |
| 27 |
static int inpoly = FALSE; |
| 28 |
static char curargs[MAXARGS] = ""; |
| 29 |
static char *cap; |
| 30 |
|
| 31 |
|
| 32 |
static int let_dir( register int c); |
| 33 |
static void closepoly(void); |
| 34 |
static void polyval( register int x, register int y); |
| 35 |
static void decival( register int v); |
| 36 |
|
| 37 |
|
| 38 |
void |
| 39 |
mendpage(void) /* end of page */ |
| 40 |
{ |
| 41 |
pflush(); |
| 42 |
pglob(PEOP, 0200, NULL); |
| 43 |
} |
| 44 |
|
| 45 |
void |
| 46 |
mdone(void) /* end of graphics metafile */ |
| 47 |
{ |
| 48 |
pflush(); |
| 49 |
pglob(PEOF, 0200, NULL); |
| 50 |
} |
| 51 |
|
| 52 |
void |
| 53 |
minclude( /* include a file */ |
| 54 |
char *fname |
| 55 |
) |
| 56 |
{ |
| 57 |
pflush(); |
| 58 |
pglob(PINCL, 1, fname); |
| 59 |
} |
| 60 |
|
| 61 |
void |
| 62 |
msetpat( /* set a pattern */ |
| 63 |
int pn, |
| 64 |
char *pat |
| 65 |
) |
| 66 |
{ |
| 67 |
pflush(); |
| 68 |
pglob(PSET, pn+4, pat); |
| 69 |
} |
| 70 |
|
| 71 |
|
| 72 |
void |
| 73 |
mopenseg( /* open a segment */ |
| 74 |
char *sname |
| 75 |
) |
| 76 |
{ |
| 77 |
pflush(); |
| 78 |
pglob(POPEN, 0, sname); |
| 79 |
} |
| 80 |
|
| 81 |
|
| 82 |
void |
| 83 |
mcloseseg(void) /* close current segment */ |
| 84 |
{ |
| 85 |
pflush(); |
| 86 |
pglob(PCLOSE, 0200, NULL); |
| 87 |
} |
| 88 |
|
| 89 |
|
| 90 |
void |
| 91 |
mline( /* start a line */ |
| 92 |
int x, int y, |
| 93 |
int type, int thick, int color |
| 94 |
) |
| 95 |
{ |
| 96 |
pflush(); |
| 97 |
cura0 = (type<<4 & 060) | (thick<<2 & 014) | (color & 03); |
| 98 |
curx = x; |
| 99 |
cury = y; |
| 100 |
} |
| 101 |
|
| 102 |
|
| 103 |
void |
| 104 |
mrectangle( /* fill a rectangle */ |
| 105 |
int xmin, int ymin, int xmax, int ymax, |
| 106 |
int pat, int color |
| 107 |
) |
| 108 |
{ |
| 109 |
pflush(); |
| 110 |
cura0 = (pat<<2 & 014) | (color & 03); |
| 111 |
pprim(PRFILL, cura0, xmin, ymin, xmax, ymax, NULL); |
| 112 |
} |
| 113 |
|
| 114 |
|
| 115 |
void |
| 116 |
mtriangle( /* fill a triangle */ |
| 117 |
int xmin, int ymin, int xmax, int ymax, |
| 118 |
int d, int pat, int color |
| 119 |
) |
| 120 |
{ |
| 121 |
pflush(); |
| 122 |
cura0 = (let_dir(d)<<4 & 060) | (pat<<2 & 014) | (color & 03); |
| 123 |
pprim(PTFILL, cura0, xmin, ymin, xmax, ymax, NULL); |
| 124 |
} |
| 125 |
|
| 126 |
|
| 127 |
void |
| 128 |
mpoly( /* start a polygon */ |
| 129 |
int x, int y, |
| 130 |
int border, int pat, int color |
| 131 |
) |
| 132 |
{ |
| 133 |
pflush(); |
| 134 |
cura0 = (border<<6 & 0100) | (pat<<2 & 014) | (color & 03); |
| 135 |
cap = curargs; |
| 136 |
inpoly = TRUE; |
| 137 |
putdec(x); |
| 138 |
*cap++ = ' '; |
| 139 |
putdec(y); |
| 140 |
} |
| 141 |
|
| 142 |
|
| 143 |
void |
| 144 |
mtext( /* matrix string */ |
| 145 |
int x, int y, |
| 146 |
char *s, |
| 147 |
int cpi, |
| 148 |
int color |
| 149 |
) |
| 150 |
{ |
| 151 |
pflush(); |
| 152 |
cura0 = (color & 03); |
| 153 |
if (cpi < 10) { |
| 154 |
cura0 += 04; |
| 155 |
cpi *= 2; |
| 156 |
} |
| 157 |
if (cpi > 11) |
| 158 |
cura0 += 020; |
| 159 |
if (cpi > 14) |
| 160 |
cura0 += 020; |
| 161 |
if (cpi > 18) |
| 162 |
cura0 += 020; |
| 163 |
pprim(PMSTR, cura0, x, y, x, y, s); |
| 164 |
} |
| 165 |
|
| 166 |
|
| 167 |
void |
| 168 |
mvstr( /* vector string */ |
| 169 |
int xmin, int ymin, int xmax, int ymax, |
| 170 |
char *s, |
| 171 |
int d, int thick, int color |
| 172 |
) |
| 173 |
{ |
| 174 |
pflush(); |
| 175 |
cura0 = (let_dir(d)<<4 & 060) | (thick<<2 & 014) | (color & 03); |
| 176 |
pprim(PVSTR, cura0, xmin, ymin, xmax, ymax, s); |
| 177 |
} |
| 178 |
|
| 179 |
|
| 180 |
void |
| 181 |
msegment( /* segment */ |
| 182 |
int xmin, int ymin, int xmax, int ymax, |
| 183 |
char *sname, |
| 184 |
int d, int thick, int color |
| 185 |
) |
| 186 |
{ |
| 187 |
pflush(); |
| 188 |
cura0 = (let_dir(d)<<4 & 060) | (thick<<2 & 014) | (color & 03); |
| 189 |
pprim(PSEG, cura0, xmin, ymin, xmax, ymax, sname); |
| 190 |
} |
| 191 |
|
| 192 |
|
| 193 |
void |
| 194 |
mdraw( /* draw to next point */ |
| 195 |
int x, int y |
| 196 |
) |
| 197 |
{ |
| 198 |
if (inpoly) { |
| 199 |
polyval(x, y); |
| 200 |
} else if (x != curx || y != cury) { |
| 201 |
plseg(cura0, curx, cury, x, y); |
| 202 |
curx = x; |
| 203 |
cury = y; |
| 204 |
} |
| 205 |
} |
| 206 |
|
| 207 |
|
| 208 |
static void |
| 209 |
decival( /* add value to polygon */ |
| 210 |
register int v |
| 211 |
) |
| 212 |
{ |
| 213 |
if (!v) |
| 214 |
return; |
| 215 |
decival(v/10); |
| 216 |
*cap++ = v%10 + '0'; |
| 217 |
} |
| 218 |
|
| 219 |
|
| 220 |
static void |
| 221 |
polyval( /* add vertex to a polygon */ |
| 222 |
register int x, |
| 223 |
register int y |
| 224 |
) |
| 225 |
{ |
| 226 |
*cap++ = ' '; |
| 227 |
putdec(x); |
| 228 |
*cap++ = ' '; |
| 229 |
putdec(y); |
| 230 |
} |
| 231 |
|
| 232 |
|
| 233 |
static void |
| 234 |
closepoly(void) /* close current polygon */ |
| 235 |
{ |
| 236 |
*cap = '\0'; |
| 237 |
pprim(PPFILL, cura0, 0, 0, XYSIZE-1, XYSIZE-1, curargs); |
| 238 |
inpoly = FALSE; |
| 239 |
} |
| 240 |
|
| 241 |
|
| 242 |
static int |
| 243 |
let_dir( /* convert letter to corresponding direction */ |
| 244 |
register int c |
| 245 |
) |
| 246 |
{ |
| 247 |
switch (c) { |
| 248 |
case 'R': |
| 249 |
case 'r': |
| 250 |
return(RIGHT); |
| 251 |
case 'U': |
| 252 |
case 'u': |
| 253 |
return(UP); |
| 254 |
case 'L': |
| 255 |
case 'l': |
| 256 |
return(LEFT); |
| 257 |
case 'D': |
| 258 |
case 'd': |
| 259 |
return(DOWN); |
| 260 |
} |
| 261 |
return(0); |
| 262 |
} |
