1 |
greg |
1.7 |
/* Copyright (c) 1991 Regents of the University of California */ |
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greg |
1.1 |
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3 |
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#ifndef lint |
4 |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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/* |
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* text.c - functions for text patterns and mixtures. |
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* |
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* 11/12/86 |
11 |
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*/ |
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#include "ray.h" |
14 |
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#include "otypes.h" |
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17 |
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/* |
18 |
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* A text pattern is specified as the text (a file or line), |
19 |
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* the upper left anchor point, the right motion vector, the down |
20 |
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* motion vector, and the foreground and background brightness. |
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* For a file, the description is as follows: |
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* |
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* modifier brighttext id |
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* 2 fontfile textfile |
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* 0 |
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* 11 |
27 |
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* Ax Ay Az |
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* Rx Ry Rz |
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* Dx Dy Dz |
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* foreground background |
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* |
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* For a single line, we use: |
33 |
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* |
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* modifier brighttext id |
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* N+2 fontfile . This is a line with N words... |
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* 0 |
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* 11 |
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* Ax Ay Az |
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* Rx Ry Rz |
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* Dx Dy Dz |
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* foreground background |
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* |
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* Colortext is identical, except colors are given rather than |
44 |
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* brightnesses. Mixtext has foreground and background modifiers: |
45 |
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* |
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* modifier mixtext id |
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* 4+ foremod backmod fontfile text.. |
48 |
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* 0 |
49 |
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* 9 |
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* Ax Ay Az |
51 |
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* Rx Ry Rz |
52 |
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* Dx Dy Dz |
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*/ |
54 |
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55 |
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#define fndx(m) ((m)->otype==MIX_TEXT ? 2 : 0) |
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#define tndx(m) ((m)->otype==MIX_TEXT ? 3 : 1) |
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58 |
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extern char *libpath; /* library search path */ |
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60 |
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typedef unsigned char GLYPH; |
61 |
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62 |
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typedef struct font { |
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GLYPH *fg[256]; /* font glyphs */ |
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char *name; /* font file name */ |
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struct font *next; /* next font in list */ |
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} FONT; |
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68 |
greg |
1.7 |
typedef struct { |
69 |
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char **t; /* text array */ |
70 |
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FVECT right, down; /* right and down unit vectors */ |
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FONT *f; /* our font */ |
72 |
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} TEXT; |
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74 |
greg |
1.6 |
extern char *fgetword(); |
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76 |
greg |
1.7 |
TEXT *gettext(); |
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greg |
1.1 |
|
78 |
greg |
1.7 |
FONT *getfont(); |
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greg |
1.1 |
|
80 |
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static FONT *fontlist = NULL; /* our font list */ |
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82 |
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83 |
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text(m, r) |
84 |
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register OBJREC *m; |
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RAY *r; |
86 |
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{ |
87 |
greg |
1.7 |
double v[3]; |
88 |
greg |
1.1 |
int foreground; |
89 |
greg |
1.7 |
/* get transformed position */ |
90 |
greg |
1.4 |
if (r->rox != NULL) |
91 |
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multp3(v, r->rop, r->rox->b.xfm); |
92 |
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else |
93 |
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VCOPY(v, r->rop); |
94 |
greg |
1.7 |
/* check if we are within a text glyph */ |
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foreground = intext(v, m); |
96 |
greg |
1.1 |
/* modify */ |
97 |
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if (m->otype == MIX_TEXT) { |
98 |
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OBJECT omod; |
99 |
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char *modname = m->oargs.sarg[foreground ? 0 : 1]; |
100 |
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if (!strcmp(modname, VOIDID)) |
101 |
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omod = OVOID; |
102 |
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else if ((omod = modifier(modname)) == OVOID) { |
103 |
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sprintf(errmsg, "undefined modifier \"%s\"", modname); |
104 |
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objerror(m, USER, errmsg); |
105 |
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} |
106 |
greg |
1.7 |
raytexture(r, omod); |
107 |
greg |
1.1 |
} else if (m->otype == PAT_BTEXT) { |
108 |
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if (foreground) |
109 |
greg |
1.7 |
scalecolor(r->pcol, m->oargs.farg[9]); |
110 |
greg |
1.1 |
else |
111 |
greg |
1.7 |
scalecolor(r->pcol, m->oargs.farg[10]); |
112 |
greg |
1.1 |
} else { /* PAT_CTEXT */ |
113 |
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COLOR cval; |
114 |
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if (foreground) |
115 |
greg |
1.7 |
setcolor(cval, m->oargs.farg[9], |
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m->oargs.farg[10], |
117 |
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m->oargs.farg[11]); |
118 |
greg |
1.1 |
else |
119 |
greg |
1.7 |
setcolor(cval, m->oargs.farg[12], |
120 |
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m->oargs.farg[13], |
121 |
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m->oargs.farg[14]); |
122 |
greg |
1.1 |
multcolor(r->pcol, cval); |
123 |
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} |
124 |
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} |
125 |
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126 |
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127 |
greg |
1.7 |
TEXT * |
128 |
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gettext(tm) /* get text structure for material */ |
129 |
greg |
1.1 |
register OBJREC *tm; |
130 |
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{ |
131 |
greg |
1.7 |
#define R (tm->oargs.farg+3) |
132 |
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#define D (tm->oargs.farg+6) |
133 |
greg |
1.1 |
extern char *strcpy(), *fgets(); |
134 |
greg |
1.7 |
FVECT DxR; |
135 |
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double d; |
136 |
greg |
1.1 |
FILE *fp; |
137 |
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char linbuf[512]; |
138 |
greg |
1.7 |
register TEXT *t; |
139 |
greg |
1.1 |
register int i; |
140 |
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register char *s; |
141 |
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142 |
greg |
1.7 |
if ((t = (TEXT *)tm->os) != NULL) |
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return(t); |
144 |
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/* check arguments */ |
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if (tm->oargs.nsargs - tndx(tm) < 1 || |
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tm->oargs.nfargs != (tm->otype == PAT_BTEXT ? 11 : |
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tm->otype == PAT_CTEXT ? 15 : 9)) |
148 |
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objerror(tm, USER, "bad # arguments"); |
149 |
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if ((t = (TEXT *)malloc(sizeof(TEXT))) == NULL) |
150 |
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goto memerr; |
151 |
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/* compute vectors */ |
152 |
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fcross(DxR, D, R); |
153 |
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fcross(t->right, DxR, D); |
154 |
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d = DOT(D,D) / DOT(t->right,t->right); |
155 |
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for (i = 0; i < 3; i++) |
156 |
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t->right[i] *= d; |
157 |
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fcross(t->down, R, DxR); |
158 |
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d = DOT(R,R) / DOT(t->down,t->down); |
159 |
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for (i = 0; i < 3; i++) |
160 |
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t->down[i] *= d; |
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/* get text */ |
162 |
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t->t = (char **)malloc(2*sizeof(char **)); |
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if (t->t == NULL) |
164 |
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goto memerr; |
165 |
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if (tm->oargs.nsargs - tndx(tm) > 1) { /* single line */ |
166 |
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s = linbuf; |
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for (i = tndx(tm)+1; i < tm->oargs.nsargs; i++) { |
168 |
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strcpy(s, tm->oargs.sarg[i]); |
169 |
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s += strlen(s); |
170 |
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*s++ = ' '; |
171 |
greg |
1.1 |
} |
172 |
greg |
1.7 |
*--s = '\0'; |
173 |
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t->t[0] = savqstr(linbuf); |
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t->t[1] = NULL; |
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} else { /* text file */ |
176 |
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if ((s = getpath(tm->oargs.sarg[tndx(tm)], |
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libpath, R_OK)) == NULL) { |
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sprintf(errmsg, "cannot find text file \"%s\"", |
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tm->oargs.sarg[tndx(tm)]); |
180 |
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error(USER, errmsg); |
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} |
182 |
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if ((fp = fopen(s, "r")) == NULL) { |
183 |
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sprintf(errmsg, "cannot open text file \"%s\"", |
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s); |
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error(SYSTEM, errmsg); |
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} |
187 |
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for (i=0; fgets(linbuf,sizeof(linbuf),fp)!=NULL; i++) { |
188 |
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s = linbuf + strlen(linbuf) - 1; |
189 |
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if (*s == '\n') |
190 |
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*s = '\0'; |
191 |
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t->t=(char **)realloc((char *)t->t, |
192 |
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(i+2)*sizeof(char **)); |
193 |
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if (t->t == NULL) |
194 |
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goto memerr; |
195 |
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t->t[i] = savqstr(linbuf); |
196 |
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} |
197 |
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t->t[i] = NULL; |
198 |
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fclose(fp); |
199 |
greg |
1.1 |
} |
200 |
greg |
1.7 |
/* get the font */ |
201 |
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t->f = getfont(tm->oargs.sarg[fndx(tm)]); |
202 |
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/* we're done */ |
203 |
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tm->os = (char *)t; |
204 |
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return(t); |
205 |
greg |
1.1 |
memerr: |
206 |
greg |
1.7 |
error(SYSTEM, "out of memory in gettext"); |
207 |
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#undef R |
208 |
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#undef D |
209 |
greg |
1.1 |
} |
210 |
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211 |
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212 |
greg |
1.7 |
freetext(m) /* free text structures associated with m */ |
213 |
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OBJREC *m; |
214 |
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{ |
215 |
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register TEXT *tp; |
216 |
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register int i; |
217 |
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218 |
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tp = (TEXT *)m->os; |
219 |
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if (tp == NULL) |
220 |
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return; |
221 |
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for (i = 0; tp->t[i] != NULL; i++) |
222 |
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freeqstr(tp->t[i]); |
223 |
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free((char *)tp->t); |
224 |
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free((char *)tp); |
225 |
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m->os = NULL; |
226 |
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} |
227 |
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228 |
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229 |
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intext(p, m) /* check to see if p is in text glyph */ |
230 |
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FVECT p; |
231 |
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register OBJREC *m; |
232 |
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{ |
233 |
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register TEXT *tp; |
234 |
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register int i; |
235 |
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double v[3], y, x; |
236 |
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int col, lno; |
237 |
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/* first, compute position in text */ |
238 |
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v[0] = p[0] - m->oargs.farg[0]; |
239 |
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v[1] = p[1] - m->oargs.farg[1]; |
240 |
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v[2] = p[2] - m->oargs.farg[2]; |
241 |
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col = x = DOT(v, tp->right); |
242 |
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lno = y = DOT(v, tp->down); |
243 |
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if (x < 0.0 || y < 0.0) |
244 |
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return(0); |
245 |
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x -= (double)col; |
246 |
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y = (lno+1) - y; |
247 |
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/* get the font character */ |
248 |
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tp = gettext(m); |
249 |
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for (i = 0; i < lno; i++) |
250 |
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if (tp->t[i] == NULL) |
251 |
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return(0); |
252 |
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if (col >= strlen(tp->t[i])) |
253 |
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return(0); |
254 |
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return(inglyph(x, y, tp->f->fg[tp->t[i][col]])); |
255 |
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} |
256 |
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257 |
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258 |
greg |
1.1 |
FONT * |
259 |
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getfont(fname) /* return font fname */ |
260 |
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char *fname; |
261 |
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{ |
262 |
greg |
1.6 |
char buf[16]; |
263 |
greg |
1.1 |
FILE *fp; |
264 |
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char *pathname, *err; |
265 |
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int gn, ngv, gv; |
266 |
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register GLYPH *g; |
267 |
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register FONT *f; |
268 |
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269 |
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for (f = fontlist; f != NULL; f = f->next) |
270 |
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if (!strcmp(f->name, fname)) |
271 |
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return(f); |
272 |
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/* load the font file */ |
273 |
greg |
1.3 |
if ((pathname = getpath(fname, libpath, R_OK)) == NULL) { |
274 |
greg |
1.1 |
sprintf(errmsg, "cannot find font file \"%s\"", fname); |
275 |
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error(USER, errmsg); |
276 |
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} |
277 |
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f = (FONT *)calloc(1, sizeof(FONT)); |
278 |
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if (f == NULL) |
279 |
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goto memerr; |
280 |
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f->name = savestr(fname); |
281 |
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if ((fp = fopen(pathname, "r")) == NULL) { |
282 |
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sprintf(errmsg, "cannot open font file \"%s\"", |
283 |
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pathname); |
284 |
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error(SYSTEM, errmsg); |
285 |
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} |
286 |
greg |
1.6 |
while (fgetword(buf,sizeof(buf),fp) != NULL) { /* get each glyph */ |
287 |
|
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if (!isint(buf)) |
288 |
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goto nonint; |
289 |
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gn = atoi(buf); |
290 |
greg |
1.1 |
if (gn < 0 || gn > 255) { |
291 |
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err = "illegal"; |
292 |
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goto fonterr; |
293 |
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} |
294 |
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if (f->fg[gn] != NULL) { |
295 |
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err = "duplicate"; |
296 |
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goto fonterr; |
297 |
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} |
298 |
greg |
1.6 |
if (fgetword(buf,sizeof(buf),fp) == NULL || !isint(buf) || |
299 |
|
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(ngv = atoi(buf)) < 0 || ngv > 255) { |
300 |
greg |
1.1 |
err = "bad # vertices for"; |
301 |
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goto fonterr; |
302 |
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} |
303 |
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g = (GLYPH *)malloc((2*ngv+1)*sizeof(GLYPH)); |
304 |
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if (g == NULL) |
305 |
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goto memerr; |
306 |
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f->fg[gn] = g; |
307 |
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*g++ = ngv; |
308 |
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ngv *= 2; |
309 |
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while (ngv--) { |
310 |
greg |
1.6 |
if (fgetword(buf,sizeof(buf),fp) == NULL || |
311 |
|
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!isint(buf) || |
312 |
|
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(gv = atoi(buf)) < 0 || gv > 255) { |
313 |
greg |
1.1 |
err = "bad vertex for"; |
314 |
|
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goto fonterr; |
315 |
|
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} |
316 |
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*g++ = gv; |
317 |
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} |
318 |
|
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} |
319 |
|
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fclose(fp); |
320 |
|
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f->next = fontlist; |
321 |
|
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return(fontlist = f); |
322 |
greg |
1.6 |
nonint: |
323 |
|
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sprintf(errmsg, "non-integer in font file \"%s\"", pathname); |
324 |
|
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error(USER, errmsg); |
325 |
greg |
1.1 |
fonterr: |
326 |
|
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sprintf(errmsg, "%s character (%d) in font file \"%s\"", |
327 |
|
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err, gn, pathname); |
328 |
|
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error(USER, errmsg); |
329 |
|
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memerr: |
330 |
|
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error(SYSTEM, "out of memory in fontglyph"); |
331 |
|
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} |
332 |
|
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|
333 |
|
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|
334 |
|
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inglyph(x, y, gl) /* (x,y) within font glyph gl? */ |
335 |
|
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double x, y; |
336 |
|
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GLYPH *gl; |
337 |
|
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{ |
338 |
|
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int n, ncross; |
339 |
|
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int xlb, ylb; |
340 |
|
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register GLYPH *p0, *p1; |
341 |
|
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|
342 |
greg |
1.7 |
if (gl == NULL) |
343 |
greg |
1.1 |
return(0); |
344 |
greg |
1.5 |
x *= 256.0; /* get glyph coordinates */ |
345 |
|
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y *= 256.0; |
346 |
|
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xlb = x + 0.5; |
347 |
|
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ylb = y + 0.5; |
348 |
greg |
1.1 |
n = *gl++; /* get # of vertices */ |
349 |
|
|
p0 = gl + 2*(n-1); /* connect last to first */ |
350 |
|
|
p1 = gl; |
351 |
|
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ncross = 0; |
352 |
|
|
/* positive x axis cross test */ |
353 |
|
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while (n--) { |
354 |
|
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if ((p0[1] > ylb) ^ (p1[1] > ylb)) |
355 |
|
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if (p0[0] > xlb && p1[0] > xlb) |
356 |
|
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ncross++; |
357 |
|
|
else if (p0[0] > xlb || p1[0] > xlb) |
358 |
|
|
ncross += (p1[1] > p0[1]) ^ |
359 |
|
|
((p0[1]-y)*(p1[0]-x) > |
360 |
|
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(p0[0]-x)*(p1[1]-y)); |
361 |
|
|
p0 = p1; |
362 |
|
|
p1 += 2; |
363 |
|
|
} |
364 |
|
|
return(ncross & 01); |
365 |
|
|
} |