1 |
greg |
2.15 |
/* Copyright (c) 1995 Regents of the University of California */ |
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greg |
1.1 |
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#ifndef lint |
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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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#include "ray.h" |
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#include "otypes.h" |
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greg |
2.2 |
#include "font.h" |
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greg |
1.1 |
/* |
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* A text pattern is specified as the text (a file or line), |
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* the upper left anchor point, the right motion vector, the down |
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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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greg |
2.4 |
* 11+ |
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greg |
1.1 |
* 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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greg |
2.4 |
* [spacing] |
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greg |
1.1 |
* |
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* For a single line, we use: |
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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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greg |
2.4 |
* 11+ |
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greg |
1.1 |
* 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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greg |
2.4 |
* [spacing] |
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greg |
1.1 |
* |
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* Colortext is identical, except colors are given rather than |
46 |
greg |
2.15 |
* brightnesses. |
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greg |
1.1 |
* |
48 |
greg |
2.15 |
* Mixtext has foreground and background modifiers: |
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* |
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greg |
1.1 |
* modifier mixtext id |
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* 4+ foremod backmod fontfile text.. |
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* 0 |
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greg |
2.4 |
* 9+ |
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greg |
1.1 |
* Ax Ay Az |
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* Rx Ry Rz |
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* Dx Dy Dz |
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greg |
2.4 |
* [spacing] |
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greg |
1.1 |
*/ |
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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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greg |
2.4 |
#define sndx(m) ((m)->otype==PAT_BTEXT ? 11 : \ |
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(m)->otype==PAT_CTEXT ? 15 : 9) |
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greg |
1.1 |
|
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greg |
1.8 |
typedef struct tline { |
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struct tline *next; /* pointer to next line */ |
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greg |
2.4 |
short *spc; /* character spacing */ |
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int width; /* total line width */ |
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greg |
1.8 |
/* followed by the string */ |
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} TLINE; |
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greg |
1.9 |
#define TLSTR(l) ((char *)((l)+1)) |
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greg |
1.8 |
|
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greg |
1.7 |
typedef struct { |
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FVECT right, down; /* right and down unit vectors */ |
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FONT *f; /* our font */ |
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greg |
1.8 |
TLINE tl; /* line list */ |
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greg |
1.7 |
} TEXT; |
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greg |
2.13 |
extern char *getlibpath(); |
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greg |
2.3 |
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greg |
1.6 |
extern char *fgetword(); |
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greg |
1.7 |
TEXT *gettext(); |
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greg |
1.1 |
|
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greg |
1.8 |
TLINE *tlalloc(); |
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greg |
1.1 |
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greg |
2.16 |
do_text(m, r) |
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greg |
1.1 |
register OBJREC *m; |
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RAY *r; |
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{ |
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greg |
1.10 |
FVECT v; |
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greg |
1.1 |
int foreground; |
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greg |
1.7 |
/* get transformed position */ |
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greg |
1.4 |
if (r->rox != NULL) |
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multp3(v, r->rop, r->rox->b.xfm); |
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else |
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VCOPY(v, r->rop); |
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greg |
1.7 |
/* check if we are within a text glyph */ |
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foreground = intext(v, m); |
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greg |
1.1 |
/* modify */ |
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if (m->otype == MIX_TEXT) { |
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OBJECT omod; |
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char *modname = m->oargs.sarg[foreground ? 0 : 1]; |
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if (!strcmp(modname, VOIDID)) |
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omod = OVOID; |
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else if ((omod = modifier(modname)) == OVOID) { |
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sprintf(errmsg, "undefined modifier \"%s\"", modname); |
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objerror(m, USER, errmsg); |
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} |
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greg |
2.12 |
if (rayshade(r, omod)) { |
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if (m->omod != OVOID) |
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objerror(m, USER, "inappropriate modifier"); |
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return(1); |
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} |
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greg |
2.15 |
} else if (m->otype == PAT_BTEXT) { |
118 |
greg |
1.1 |
if (foreground) |
119 |
greg |
1.7 |
scalecolor(r->pcol, m->oargs.farg[9]); |
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greg |
1.1 |
else |
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greg |
1.7 |
scalecolor(r->pcol, m->oargs.farg[10]); |
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greg |
1.1 |
} else { /* PAT_CTEXT */ |
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COLOR cval; |
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if (foreground) |
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greg |
1.7 |
setcolor(cval, m->oargs.farg[9], |
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m->oargs.farg[10], |
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m->oargs.farg[11]); |
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greg |
1.1 |
else |
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greg |
1.7 |
setcolor(cval, m->oargs.farg[12], |
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m->oargs.farg[13], |
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m->oargs.farg[14]); |
132 |
greg |
1.1 |
multcolor(r->pcol, cval); |
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} |
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greg |
2.12 |
return(0); |
135 |
greg |
1.1 |
} |
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138 |
greg |
1.8 |
TLINE * |
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tlalloc(s) /* allocate and assign text line */ |
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char *s; |
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{ |
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extern char *strcpy(); |
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greg |
2.4 |
register int siz; |
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greg |
1.8 |
register TLINE *tl; |
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greg |
2.4 |
siz = strlen(s) + 1; |
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if ((tl=(TLINE *)malloc(sizeof(TLINE)+siz)) == NULL || |
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(tl->spc=(short *)malloc(siz*sizeof(short))) == NULL) |
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greg |
1.8 |
error(SYSTEM, "out of memory in tlalloc"); |
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tl->next = NULL; |
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strcpy(TLSTR(tl), s); |
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return(tl); |
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} |
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156 |
greg |
1.7 |
TEXT * |
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gettext(tm) /* get text structure for material */ |
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greg |
1.1 |
register OBJREC *tm; |
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{ |
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greg |
1.7 |
#define R (tm->oargs.farg+3) |
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#define D (tm->oargs.farg+6) |
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greg |
2.11 |
extern char *strcpy(); |
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greg |
1.7 |
FVECT DxR; |
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double d; |
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greg |
1.1 |
FILE *fp; |
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char linbuf[512]; |
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greg |
1.8 |
TEXT *t; |
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greg |
1.1 |
register int i; |
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greg |
1.8 |
register TLINE *tlp; |
170 |
greg |
1.1 |
register char *s; |
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greg |
1.7 |
if ((t = (TEXT *)tm->os) != NULL) |
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return(t); |
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/* check arguments */ |
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greg |
2.4 |
if (tm->oargs.nsargs - tndx(tm) < 1 || tm->oargs.nfargs < sndx(tm)) |
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greg |
1.7 |
objerror(tm, USER, "bad # arguments"); |
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if ((t = (TEXT *)malloc(sizeof(TEXT))) == NULL) |
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greg |
2.10 |
error(SYSTEM, "out of memory in gettext"); |
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greg |
1.7 |
/* compute vectors */ |
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fcross(DxR, D, R); |
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fcross(t->right, DxR, D); |
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gregl |
2.17 |
d = DOT(t->right,t->right); |
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if (d <= FTINY*FTINY) |
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objerror(tm, USER, "illegal motion vector"); |
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d = DOT(D,D)/d; |
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greg |
1.7 |
for (i = 0; i < 3; i++) |
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t->right[i] *= d; |
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fcross(t->down, R, DxR); |
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greg |
1.9 |
d = DOT(R,R)/DOT(t->down,t->down); |
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greg |
1.7 |
for (i = 0; i < 3; i++) |
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t->down[i] *= d; |
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/* get text */ |
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greg |
1.8 |
tlp = &t->tl; |
194 |
greg |
1.7 |
if (tm->oargs.nsargs - tndx(tm) > 1) { /* single line */ |
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s = linbuf; |
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for (i = tndx(tm)+1; i < tm->oargs.nsargs; i++) { |
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strcpy(s, tm->oargs.sarg[i]); |
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s += strlen(s); |
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*s++ = ' '; |
200 |
greg |
1.1 |
} |
201 |
greg |
1.7 |
*--s = '\0'; |
202 |
greg |
1.8 |
tlp->next = tlalloc(linbuf); |
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tlp = tlp->next; |
204 |
greg |
1.7 |
} else { /* text file */ |
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if ((s = getpath(tm->oargs.sarg[tndx(tm)], |
206 |
greg |
2.13 |
getlibpath(), R_OK)) == NULL) { |
207 |
greg |
1.7 |
sprintf(errmsg, "cannot find text file \"%s\"", |
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tm->oargs.sarg[tndx(tm)]); |
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error(USER, errmsg); |
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} |
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if ((fp = fopen(s, "r")) == NULL) { |
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greg |
2.4 |
sprintf(errmsg, "cannot open text file \"%s\"", s); |
213 |
greg |
1.7 |
error(SYSTEM, errmsg); |
214 |
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} |
215 |
greg |
1.8 |
while (fgets(linbuf, sizeof(linbuf), fp) != NULL) { |
216 |
greg |
1.7 |
s = linbuf + strlen(linbuf) - 1; |
217 |
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if (*s == '\n') |
218 |
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*s = '\0'; |
219 |
greg |
1.8 |
tlp->next = tlalloc(linbuf); |
220 |
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tlp = tlp->next; |
221 |
greg |
1.7 |
} |
222 |
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fclose(fp); |
223 |
greg |
1.1 |
} |
224 |
greg |
1.8 |
tlp->next = NULL; |
225 |
greg |
1.7 |
/* get the font */ |
226 |
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t->f = getfont(tm->oargs.sarg[fndx(tm)]); |
227 |
greg |
2.4 |
/* compute character spacing */ |
228 |
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i = sndx(tm); |
229 |
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d = i < tm->oargs.nfargs ? tm->oargs.farg[i] : 0.0; |
230 |
greg |
2.14 |
i = d * 255.0; |
231 |
greg |
2.6 |
t->tl.width = 0; |
232 |
greg |
2.4 |
for (tlp = t->tl.next; tlp != NULL; tlp = tlp->next) { |
233 |
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if (i < 0) |
234 |
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tlp->width = squeeztext(tlp->spc, TLSTR(tlp), t->f, -i); |
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else if (i > 0) |
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tlp->width = proptext(tlp->spc, TLSTR(tlp), t->f, i, 3); |
237 |
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else |
238 |
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tlp->width = uniftext(tlp->spc, TLSTR(tlp), t->f); |
239 |
greg |
2.6 |
if (tlp->width > t->tl.width) |
240 |
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t->tl.width = tlp->width; |
241 |
greg |
2.4 |
} |
242 |
greg |
1.7 |
/* we're done */ |
243 |
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tm->os = (char *)t; |
244 |
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return(t); |
245 |
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#undef R |
246 |
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#undef D |
247 |
greg |
1.1 |
} |
248 |
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249 |
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250 |
greg |
1.7 |
freetext(m) /* free text structures associated with m */ |
251 |
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OBJREC *m; |
252 |
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{ |
253 |
greg |
2.9 |
register TEXT *tp; |
254 |
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register TLINE *tlp; |
255 |
greg |
1.7 |
|
256 |
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tp = (TEXT *)m->os; |
257 |
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if (tp == NULL) |
258 |
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return; |
259 |
greg |
2.9 |
while ((tlp = tp->tl.next) != NULL) { |
260 |
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tp->tl.next = tlp->next; |
261 |
greg |
2.4 |
free((char *)tlp->spc); |
262 |
greg |
1.9 |
free((char *)tlp); |
263 |
greg |
2.4 |
} |
264 |
greg |
1.7 |
free((char *)tp); |
265 |
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m->os = NULL; |
266 |
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} |
267 |
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268 |
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269 |
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intext(p, m) /* check to see if p is in text glyph */ |
270 |
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FVECT p; |
271 |
greg |
1.8 |
OBJREC *m; |
272 |
greg |
1.7 |
{ |
273 |
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register TEXT *tp; |
274 |
greg |
1.8 |
register TLINE *tlp; |
275 |
greg |
1.10 |
FVECT v; |
276 |
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double y, x; |
277 |
greg |
2.4 |
register int i, h; |
278 |
greg |
1.7 |
/* first, compute position in text */ |
279 |
greg |
1.9 |
tp = gettext(m); |
280 |
greg |
1.7 |
v[0] = p[0] - m->oargs.farg[0]; |
281 |
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v[1] = p[1] - m->oargs.farg[1]; |
282 |
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v[2] = p[2] - m->oargs.farg[2]; |
283 |
greg |
2.6 |
x = DOT(v, tp->right); |
284 |
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i = sndx(m); |
285 |
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if (i < m->oargs.nfargs) |
286 |
greg |
2.14 |
x *= tp->f->mwidth + 255.*fabs(m->oargs.farg[i]); |
287 |
greg |
2.6 |
else |
288 |
greg |
2.14 |
x *= 255.; |
289 |
greg |
2.6 |
h = x; |
290 |
greg |
2.4 |
i = y = DOT(v, tp->down); |
291 |
greg |
1.7 |
if (x < 0.0 || y < 0.0) |
292 |
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return(0); |
293 |
greg |
2.4 |
x -= (double)h; |
294 |
greg |
2.14 |
y = ((i+1) - y)*255.; |
295 |
greg |
2.4 |
/* find the line position */ |
296 |
greg |
1.8 |
for (tlp = tp->tl.next; tlp != NULL; tlp = tlp->next) |
297 |
greg |
2.4 |
if (--i < 0) |
298 |
greg |
1.8 |
break; |
299 |
greg |
2.4 |
if (tlp == NULL || h >= tlp->width) |
300 |
greg |
1.7 |
return(0); |
301 |
greg |
2.4 |
for (i = 0; (h -= tlp->spc[i]) >= 0; i++) |
302 |
greg |
2.14 |
if (h < 255 && inglyph(h+x, y, |
303 |
greg |
2.4 |
tp->f->fg[TLSTR(tlp)[i]&0xff])) |
304 |
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return(1); |
305 |
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return(0); |
306 |
greg |
1.7 |
} |
307 |
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308 |
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309 |
greg |
1.1 |
inglyph(x, y, gl) /* (x,y) within font glyph gl? */ |
310 |
greg |
2.14 |
double x, y; /* real coordinates in range [0,255) */ |
311 |
greg |
2.3 |
register GLYPH *gl; |
312 |
greg |
1.1 |
{ |
313 |
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int n, ncross; |
314 |
greg |
2.5 |
int xlb, ylb; |
315 |
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int tv; |
316 |
greg |
2.2 |
register GORD *p0, *p1; |
317 |
greg |
1.1 |
|
318 |
greg |
1.7 |
if (gl == NULL) |
319 |
greg |
1.1 |
return(0); |
320 |
greg |
2.5 |
xlb = x; |
321 |
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ylb = y; |
322 |
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if (gl->left > xlb || gl->right <= xlb || /* check extent */ |
323 |
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gl->bottom > ylb || gl->top <= ylb) |
324 |
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return(0); |
325 |
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xlb = xlb<<1 | 1; /* add 1/2 to test points... */ |
326 |
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ylb = ylb<<1 | 1; /* ...so no equal comparisons */ |
327 |
greg |
2.2 |
n = gl->nverts; /* get # of vertices */ |
328 |
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p0 = gvlist(gl) + 2*(n-1); /* connect last to first */ |
329 |
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p1 = gvlist(gl); |
330 |
greg |
1.1 |
ncross = 0; |
331 |
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/* positive x axis cross test */ |
332 |
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while (n--) { |
333 |
greg |
2.5 |
if ((p0[1]<<1 > ylb) ^ (p1[1]<<1 > ylb)) { |
334 |
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tv = p0[0]<<1 > xlb | (p1[0]<<1 > xlb) << 1; |
335 |
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if (tv == 03) |
336 |
greg |
1.1 |
ncross++; |
337 |
greg |
2.5 |
else if (tv) |
338 |
greg |
1.1 |
ncross += (p1[1] > p0[1]) ^ |
339 |
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((p0[1]-y)*(p1[0]-x) > |
340 |
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(p0[0]-x)*(p1[1]-y)); |
341 |
greg |
2.5 |
} |
342 |
greg |
1.1 |
p0 = p1; |
343 |
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p1 += 2; |
344 |
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} |
345 |
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return(ncross & 01); |
346 |
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} |