1 |
greg |
1.1 |
#ifndef lint |
2 |
greg |
2.20 |
static const char RCSid[] = "$Id$"; |
3 |
greg |
1.1 |
#endif |
4 |
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/* |
5 |
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* text.c - functions for text patterns and mixtures. |
6 |
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*/ |
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8 |
greg |
2.20 |
/* ==================================================================== |
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* The Radiance Software License, Version 1.0 |
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* |
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* Copyright (c) 1990 - 2002 The Regents of the University of California, |
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* through Lawrence Berkeley National Laboratory. All rights reserved. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* 3. The end-user documentation included with the redistribution, |
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* if any, must include the following acknowledgment: |
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* "This product includes Radiance software |
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* (http://radsite.lbl.gov/) |
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* developed by the Lawrence Berkeley National Laboratory |
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* (http://www.lbl.gov/)." |
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* Alternately, this acknowledgment may appear in the software itself, |
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* if and wherever such third-party acknowledgments normally appear. |
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* |
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* 4. The names "Radiance," "Lawrence Berkeley National Laboratory" |
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* and "The Regents of the University of California" must |
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* not be used to endorse or promote products derived from this |
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* software without prior written permission. For written |
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* permission, please contact [email protected]. |
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* |
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* 5. Products derived from this software may not be called "Radiance", |
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* nor may "Radiance" appear in their name, without prior written |
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* permission of Lawrence Berkeley National Laboratory. |
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* |
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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* DISCLAIMED. IN NO EVENT SHALL Lawrence Berkeley National Laboratory OR |
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* ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
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* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* ==================================================================== |
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* |
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* This software consists of voluntary contributions made by many |
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* individuals on behalf of Lawrence Berkeley National Laboratory. For more |
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* information on Lawrence Berkeley National Laboratory, please see |
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* <http://www.lbl.gov/>. |
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*/ |
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65 |
greg |
1.1 |
#include "ray.h" |
66 |
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67 |
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#include "otypes.h" |
68 |
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69 |
greg |
2.2 |
#include "font.h" |
70 |
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|
71 |
greg |
1.1 |
/* |
72 |
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* A text pattern is specified as the text (a file or line), |
73 |
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* the upper left anchor point, the right motion vector, the down |
74 |
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* motion vector, and the foreground and background brightness. |
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* For a file, the description is as follows: |
76 |
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* |
77 |
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* modifier brighttext id |
78 |
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* 2 fontfile textfile |
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* 0 |
80 |
greg |
2.4 |
* 11+ |
81 |
greg |
1.1 |
* Ax Ay Az |
82 |
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* Rx Ry Rz |
83 |
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* Dx Dy Dz |
84 |
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* foreground background |
85 |
greg |
2.4 |
* [spacing] |
86 |
greg |
1.1 |
* |
87 |
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* For a single line, we use: |
88 |
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* |
89 |
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* modifier brighttext id |
90 |
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* N+2 fontfile . This is a line with N words... |
91 |
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* 0 |
92 |
greg |
2.4 |
* 11+ |
93 |
greg |
1.1 |
* Ax Ay Az |
94 |
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* Rx Ry Rz |
95 |
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* Dx Dy Dz |
96 |
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* foreground background |
97 |
greg |
2.4 |
* [spacing] |
98 |
greg |
1.1 |
* |
99 |
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* Colortext is identical, except colors are given rather than |
100 |
greg |
2.15 |
* brightnesses. |
101 |
greg |
1.1 |
* |
102 |
greg |
2.15 |
* Mixtext has foreground and background modifiers: |
103 |
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* |
104 |
greg |
1.1 |
* modifier mixtext id |
105 |
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* 4+ foremod backmod fontfile text.. |
106 |
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* 0 |
107 |
greg |
2.4 |
* 9+ |
108 |
greg |
1.1 |
* Ax Ay Az |
109 |
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* Rx Ry Rz |
110 |
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* Dx Dy Dz |
111 |
greg |
2.4 |
* [spacing] |
112 |
greg |
1.1 |
*/ |
113 |
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114 |
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#define fndx(m) ((m)->otype==MIX_TEXT ? 2 : 0) |
115 |
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#define tndx(m) ((m)->otype==MIX_TEXT ? 3 : 1) |
116 |
greg |
2.4 |
#define sndx(m) ((m)->otype==PAT_BTEXT ? 11 : \ |
117 |
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(m)->otype==PAT_CTEXT ? 15 : 9) |
118 |
greg |
1.1 |
|
119 |
greg |
1.8 |
typedef struct tline { |
120 |
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struct tline *next; /* pointer to next line */ |
121 |
greg |
2.4 |
short *spc; /* character spacing */ |
122 |
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int width; /* total line width */ |
123 |
greg |
1.8 |
/* followed by the string */ |
124 |
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} TLINE; |
125 |
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126 |
greg |
1.9 |
#define TLSTR(l) ((char *)((l)+1)) |
127 |
greg |
1.8 |
|
128 |
greg |
1.7 |
typedef struct { |
129 |
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FVECT right, down; /* right and down unit vectors */ |
130 |
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FONT *f; /* our font */ |
131 |
greg |
1.8 |
TLINE tl; /* line list */ |
132 |
greg |
1.7 |
} TEXT; |
133 |
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134 |
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TEXT *gettext(); |
135 |
greg |
1.1 |
|
136 |
greg |
1.8 |
TLINE *tlalloc(); |
137 |
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138 |
greg |
1.1 |
|
139 |
greg |
2.16 |
do_text(m, r) |
140 |
greg |
1.1 |
register OBJREC *m; |
141 |
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RAY *r; |
142 |
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{ |
143 |
greg |
1.10 |
FVECT v; |
144 |
greg |
1.1 |
int foreground; |
145 |
greg |
1.7 |
/* get transformed position */ |
146 |
greg |
1.4 |
if (r->rox != NULL) |
147 |
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multp3(v, r->rop, r->rox->b.xfm); |
148 |
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else |
149 |
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VCOPY(v, r->rop); |
150 |
greg |
1.7 |
/* check if we are within a text glyph */ |
151 |
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foreground = intext(v, m); |
152 |
greg |
1.1 |
/* modify */ |
153 |
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if (m->otype == MIX_TEXT) { |
154 |
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OBJECT omod; |
155 |
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char *modname = m->oargs.sarg[foreground ? 0 : 1]; |
156 |
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if (!strcmp(modname, VOIDID)) |
157 |
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omod = OVOID; |
158 |
gwlarson |
2.18 |
else if ((omod = lastmod(objndx(m), modname)) == OVOID) { |
159 |
greg |
1.1 |
sprintf(errmsg, "undefined modifier \"%s\"", modname); |
160 |
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objerror(m, USER, errmsg); |
161 |
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} |
162 |
greg |
2.12 |
if (rayshade(r, omod)) { |
163 |
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if (m->omod != OVOID) |
164 |
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objerror(m, USER, "inappropriate modifier"); |
165 |
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return(1); |
166 |
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} |
167 |
greg |
2.15 |
} else if (m->otype == PAT_BTEXT) { |
168 |
greg |
1.1 |
if (foreground) |
169 |
greg |
1.7 |
scalecolor(r->pcol, m->oargs.farg[9]); |
170 |
greg |
1.1 |
else |
171 |
greg |
1.7 |
scalecolor(r->pcol, m->oargs.farg[10]); |
172 |
greg |
1.1 |
} else { /* PAT_CTEXT */ |
173 |
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COLOR cval; |
174 |
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if (foreground) |
175 |
greg |
1.7 |
setcolor(cval, m->oargs.farg[9], |
176 |
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m->oargs.farg[10], |
177 |
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m->oargs.farg[11]); |
178 |
greg |
1.1 |
else |
179 |
greg |
1.7 |
setcolor(cval, m->oargs.farg[12], |
180 |
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m->oargs.farg[13], |
181 |
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m->oargs.farg[14]); |
182 |
greg |
1.1 |
multcolor(r->pcol, cval); |
183 |
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} |
184 |
greg |
2.12 |
return(0); |
185 |
greg |
1.1 |
} |
186 |
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187 |
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188 |
greg |
1.8 |
TLINE * |
189 |
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tlalloc(s) /* allocate and assign text line */ |
190 |
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char *s; |
191 |
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{ |
192 |
greg |
2.4 |
register int siz; |
193 |
greg |
1.8 |
register TLINE *tl; |
194 |
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|
195 |
greg |
2.4 |
siz = strlen(s) + 1; |
196 |
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if ((tl=(TLINE *)malloc(sizeof(TLINE)+siz)) == NULL || |
197 |
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(tl->spc=(short *)malloc(siz*sizeof(short))) == NULL) |
198 |
greg |
1.8 |
error(SYSTEM, "out of memory in tlalloc"); |
199 |
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tl->next = NULL; |
200 |
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strcpy(TLSTR(tl), s); |
201 |
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return(tl); |
202 |
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} |
203 |
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204 |
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205 |
greg |
1.7 |
TEXT * |
206 |
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gettext(tm) /* get text structure for material */ |
207 |
greg |
1.1 |
register OBJREC *tm; |
208 |
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{ |
209 |
greg |
1.7 |
#define R (tm->oargs.farg+3) |
210 |
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#define D (tm->oargs.farg+6) |
211 |
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FVECT DxR; |
212 |
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double d; |
213 |
greg |
1.1 |
FILE *fp; |
214 |
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char linbuf[512]; |
215 |
greg |
1.8 |
TEXT *t; |
216 |
greg |
1.1 |
register int i; |
217 |
greg |
1.8 |
register TLINE *tlp; |
218 |
greg |
1.1 |
register char *s; |
219 |
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|
220 |
greg |
1.7 |
if ((t = (TEXT *)tm->os) != NULL) |
221 |
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return(t); |
222 |
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/* check arguments */ |
223 |
greg |
2.4 |
if (tm->oargs.nsargs - tndx(tm) < 1 || tm->oargs.nfargs < sndx(tm)) |
224 |
greg |
1.7 |
objerror(tm, USER, "bad # arguments"); |
225 |
|
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if ((t = (TEXT *)malloc(sizeof(TEXT))) == NULL) |
226 |
greg |
2.10 |
error(SYSTEM, "out of memory in gettext"); |
227 |
greg |
1.7 |
/* compute vectors */ |
228 |
|
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fcross(DxR, D, R); |
229 |
|
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fcross(t->right, DxR, D); |
230 |
gregl |
2.17 |
d = DOT(t->right,t->right); |
231 |
gwlarson |
2.19 |
if (d <= FTINY*FTINY*FTINY*FTINY) |
232 |
gregl |
2.17 |
objerror(tm, USER, "illegal motion vector"); |
233 |
|
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d = DOT(D,D)/d; |
234 |
greg |
1.7 |
for (i = 0; i < 3; i++) |
235 |
|
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t->right[i] *= d; |
236 |
|
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fcross(t->down, R, DxR); |
237 |
greg |
1.9 |
d = DOT(R,R)/DOT(t->down,t->down); |
238 |
greg |
1.7 |
for (i = 0; i < 3; i++) |
239 |
|
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t->down[i] *= d; |
240 |
|
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/* get text */ |
241 |
greg |
1.8 |
tlp = &t->tl; |
242 |
greg |
1.7 |
if (tm->oargs.nsargs - tndx(tm) > 1) { /* single line */ |
243 |
|
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s = linbuf; |
244 |
|
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for (i = tndx(tm)+1; i < tm->oargs.nsargs; i++) { |
245 |
|
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strcpy(s, tm->oargs.sarg[i]); |
246 |
|
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s += strlen(s); |
247 |
|
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*s++ = ' '; |
248 |
greg |
1.1 |
} |
249 |
greg |
1.7 |
*--s = '\0'; |
250 |
greg |
1.8 |
tlp->next = tlalloc(linbuf); |
251 |
|
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tlp = tlp->next; |
252 |
greg |
1.7 |
} else { /* text file */ |
253 |
|
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if ((s = getpath(tm->oargs.sarg[tndx(tm)], |
254 |
greg |
2.13 |
getlibpath(), R_OK)) == NULL) { |
255 |
greg |
1.7 |
sprintf(errmsg, "cannot find text file \"%s\"", |
256 |
|
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tm->oargs.sarg[tndx(tm)]); |
257 |
|
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error(USER, errmsg); |
258 |
|
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} |
259 |
|
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if ((fp = fopen(s, "r")) == NULL) { |
260 |
greg |
2.4 |
sprintf(errmsg, "cannot open text file \"%s\"", s); |
261 |
greg |
1.7 |
error(SYSTEM, errmsg); |
262 |
|
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} |
263 |
greg |
1.8 |
while (fgets(linbuf, sizeof(linbuf), fp) != NULL) { |
264 |
greg |
1.7 |
s = linbuf + strlen(linbuf) - 1; |
265 |
|
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if (*s == '\n') |
266 |
|
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*s = '\0'; |
267 |
greg |
1.8 |
tlp->next = tlalloc(linbuf); |
268 |
|
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tlp = tlp->next; |
269 |
greg |
1.7 |
} |
270 |
|
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fclose(fp); |
271 |
greg |
1.1 |
} |
272 |
greg |
1.8 |
tlp->next = NULL; |
273 |
greg |
1.7 |
/* get the font */ |
274 |
|
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t->f = getfont(tm->oargs.sarg[fndx(tm)]); |
275 |
greg |
2.4 |
/* compute character spacing */ |
276 |
|
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i = sndx(tm); |
277 |
|
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d = i < tm->oargs.nfargs ? tm->oargs.farg[i] : 0.0; |
278 |
greg |
2.14 |
i = d * 255.0; |
279 |
greg |
2.6 |
t->tl.width = 0; |
280 |
greg |
2.4 |
for (tlp = t->tl.next; tlp != NULL; tlp = tlp->next) { |
281 |
|
|
if (i < 0) |
282 |
|
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tlp->width = squeeztext(tlp->spc, TLSTR(tlp), t->f, -i); |
283 |
|
|
else if (i > 0) |
284 |
|
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tlp->width = proptext(tlp->spc, TLSTR(tlp), t->f, i, 3); |
285 |
|
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else |
286 |
|
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tlp->width = uniftext(tlp->spc, TLSTR(tlp), t->f); |
287 |
greg |
2.6 |
if (tlp->width > t->tl.width) |
288 |
|
|
t->tl.width = tlp->width; |
289 |
greg |
2.4 |
} |
290 |
greg |
1.7 |
/* we're done */ |
291 |
|
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tm->os = (char *)t; |
292 |
|
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return(t); |
293 |
|
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#undef R |
294 |
|
|
#undef D |
295 |
greg |
1.1 |
} |
296 |
|
|
|
297 |
|
|
|
298 |
greg |
1.7 |
freetext(m) /* free text structures associated with m */ |
299 |
|
|
OBJREC *m; |
300 |
|
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{ |
301 |
greg |
2.9 |
register TEXT *tp; |
302 |
|
|
register TLINE *tlp; |
303 |
greg |
1.7 |
|
304 |
|
|
tp = (TEXT *)m->os; |
305 |
|
|
if (tp == NULL) |
306 |
|
|
return; |
307 |
greg |
2.9 |
while ((tlp = tp->tl.next) != NULL) { |
308 |
|
|
tp->tl.next = tlp->next; |
309 |
greg |
2.20 |
free((void *)tlp->spc); |
310 |
|
|
free((void *)tlp); |
311 |
greg |
2.4 |
} |
312 |
greg |
2.20 |
freefont(tp->f); /* release font reference */ |
313 |
|
|
free((void *)tp); |
314 |
greg |
1.7 |
m->os = NULL; |
315 |
|
|
} |
316 |
|
|
|
317 |
|
|
|
318 |
|
|
intext(p, m) /* check to see if p is in text glyph */ |
319 |
|
|
FVECT p; |
320 |
greg |
1.8 |
OBJREC *m; |
321 |
greg |
1.7 |
{ |
322 |
|
|
register TEXT *tp; |
323 |
greg |
1.8 |
register TLINE *tlp; |
324 |
greg |
1.10 |
FVECT v; |
325 |
|
|
double y, x; |
326 |
greg |
2.4 |
register int i, h; |
327 |
greg |
1.7 |
/* first, compute position in text */ |
328 |
greg |
1.9 |
tp = gettext(m); |
329 |
greg |
1.7 |
v[0] = p[0] - m->oargs.farg[0]; |
330 |
|
|
v[1] = p[1] - m->oargs.farg[1]; |
331 |
|
|
v[2] = p[2] - m->oargs.farg[2]; |
332 |
greg |
2.6 |
x = DOT(v, tp->right); |
333 |
|
|
i = sndx(m); |
334 |
|
|
if (i < m->oargs.nfargs) |
335 |
greg |
2.14 |
x *= tp->f->mwidth + 255.*fabs(m->oargs.farg[i]); |
336 |
greg |
2.6 |
else |
337 |
greg |
2.14 |
x *= 255.; |
338 |
greg |
2.6 |
h = x; |
339 |
greg |
2.4 |
i = y = DOT(v, tp->down); |
340 |
greg |
1.7 |
if (x < 0.0 || y < 0.0) |
341 |
|
|
return(0); |
342 |
greg |
2.4 |
x -= (double)h; |
343 |
greg |
2.14 |
y = ((i+1) - y)*255.; |
344 |
greg |
2.4 |
/* find the line position */ |
345 |
greg |
1.8 |
for (tlp = tp->tl.next; tlp != NULL; tlp = tlp->next) |
346 |
greg |
2.4 |
if (--i < 0) |
347 |
greg |
1.8 |
break; |
348 |
greg |
2.4 |
if (tlp == NULL || h >= tlp->width) |
349 |
greg |
1.7 |
return(0); |
350 |
greg |
2.4 |
for (i = 0; (h -= tlp->spc[i]) >= 0; i++) |
351 |
greg |
2.14 |
if (h < 255 && inglyph(h+x, y, |
352 |
greg |
2.4 |
tp->f->fg[TLSTR(tlp)[i]&0xff])) |
353 |
|
|
return(1); |
354 |
|
|
return(0); |
355 |
greg |
1.7 |
} |
356 |
|
|
|
357 |
|
|
|
358 |
greg |
1.1 |
inglyph(x, y, gl) /* (x,y) within font glyph gl? */ |
359 |
greg |
2.14 |
double x, y; /* real coordinates in range [0,255) */ |
360 |
greg |
2.3 |
register GLYPH *gl; |
361 |
greg |
1.1 |
{ |
362 |
|
|
int n, ncross; |
363 |
greg |
2.5 |
int xlb, ylb; |
364 |
|
|
int tv; |
365 |
greg |
2.2 |
register GORD *p0, *p1; |
366 |
greg |
1.1 |
|
367 |
greg |
1.7 |
if (gl == NULL) |
368 |
greg |
1.1 |
return(0); |
369 |
greg |
2.5 |
xlb = x; |
370 |
|
|
ylb = y; |
371 |
|
|
if (gl->left > xlb || gl->right <= xlb || /* check extent */ |
372 |
|
|
gl->bottom > ylb || gl->top <= ylb) |
373 |
|
|
return(0); |
374 |
|
|
xlb = xlb<<1 | 1; /* add 1/2 to test points... */ |
375 |
|
|
ylb = ylb<<1 | 1; /* ...so no equal comparisons */ |
376 |
greg |
2.2 |
n = gl->nverts; /* get # of vertices */ |
377 |
|
|
p0 = gvlist(gl) + 2*(n-1); /* connect last to first */ |
378 |
|
|
p1 = gvlist(gl); |
379 |
greg |
1.1 |
ncross = 0; |
380 |
|
|
/* positive x axis cross test */ |
381 |
|
|
while (n--) { |
382 |
greg |
2.5 |
if ((p0[1]<<1 > ylb) ^ (p1[1]<<1 > ylb)) { |
383 |
|
|
tv = p0[0]<<1 > xlb | (p1[0]<<1 > xlb) << 1; |
384 |
|
|
if (tv == 03) |
385 |
greg |
1.1 |
ncross++; |
386 |
greg |
2.5 |
else if (tv) |
387 |
greg |
1.1 |
ncross += (p1[1] > p0[1]) ^ |
388 |
|
|
((p0[1]-y)*(p1[0]-x) > |
389 |
|
|
(p0[0]-x)*(p1[1]-y)); |
390 |
greg |
2.5 |
} |
391 |
greg |
1.1 |
p0 = p1; |
392 |
|
|
p1 += 2; |
393 |
|
|
} |
394 |
|
|
return(ncross & 01); |
395 |
|
|
} |