Text3d: add assert's to check the selection and length are valid
[blender.git] / source / blender / blenkernel / intern / font.c
1 /*
2  * ***** BEGIN GPL LICENSE BLOCK *****
3  *
4  * This program is free software; you can redistribute it and/or
5  * modify it under the terms of the GNU General Public License
6  * as published by the Free Software Foundation; either version 2
7  * of the License, or (at your option) any later version.
8  *
9  * This program is distributed in the hope that it will be useful,
10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
12  * GNU General Public License for more details.
13  *
14  * You should have received a copy of the GNU General Public License
15  * along with this program; if not, write to the Free Software Foundation,
16  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
17  *
18  * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
19  * All rights reserved.
20  *
21  * The Original Code is: all of this file.
22  *
23  * Contributor(s): none yet.
24  *
25  * ***** END GPL LICENSE BLOCK *****
26  */
27
28 /** \file blender/blenkernel/intern/font.c
29  *  \ingroup bke
30  */
31
32
33 #include <stdio.h>
34 #include <string.h>
35 #include <math.h>
36 #include <stdlib.h>
37 #include <wchar.h>
38 #include <wctype.h>
39
40 #include "MEM_guardedalloc.h"
41
42 #include "BLI_utildefines.h"
43 #include "BLI_path_util.h"
44 #include "BLI_listbase.h"
45 #include "BLI_ghash.h"
46 #include "BLI_string.h"
47 #include "BLI_string_utf8.h"
48 #include "BLI_math.h"
49 #include "BLI_threads.h"
50 #include "BLI_vfontdata.h"
51
52 #include "DNA_packedFile_types.h"
53 #include "DNA_curve_types.h"
54 #include "DNA_vfont_types.h"
55 #include "DNA_scene_types.h"
56 #include "DNA_object_types.h"
57
58 #include "BKE_packedFile.h"
59 #include "BKE_library.h"
60 #include "BKE_font.h"
61 #include "BKE_global.h"
62 #include "BKE_main.h"
63 #include "BKE_anim.h"
64 #include "BKE_curve.h"
65 #include "BKE_displist.h"
66
67 static ThreadRWMutex vfont_rwlock = BLI_RWLOCK_INITIALIZER;
68
69 /* The vfont code */
70 void BKE_vfont_free_data(struct VFont *vfont)
71 {
72         if (vfont->data) {
73                 if (vfont->data->characters) {
74                         GHashIterator gh_iter;
75                         GHASH_ITER (gh_iter, vfont->data->characters) {
76                                 VChar *che = BLI_ghashIterator_getValue(&gh_iter);
77
78                                 while (che->nurbsbase.first) {
79                                         Nurb *nu = che->nurbsbase.first;
80                                         if (nu->bezt) MEM_freeN(nu->bezt);
81                                         BLI_freelinkN(&che->nurbsbase, nu);
82                                 }
83
84                                 MEM_freeN(che);
85                         }
86
87                         BLI_ghash_free(vfont->data->characters, NULL, NULL);
88                 }
89
90                 MEM_freeN(vfont->data);
91                 vfont->data = NULL;
92         }
93
94         if (vfont->temp_pf) {
95                 freePackedFile(vfont->temp_pf);  /* NULL when the font file can't be found on disk */
96                 vfont->temp_pf = NULL;
97         }
98 }
99
100 void BKE_vfont_free(struct VFont *vf)
101 {
102         if (vf == NULL) return;
103
104         BKE_vfont_free_data(vf);
105
106         if (vf->packedfile) {
107                 freePackedFile(vf->packedfile);
108                 vf->packedfile = NULL;
109         }
110 }
111
112 static void *builtin_font_data = NULL;
113 static int builtin_font_size = 0;
114
115 bool BKE_vfont_is_builtin(struct VFont *vfont)
116 {
117         return STREQ(vfont->name, FO_BUILTIN_NAME);
118 }
119
120 void BKE_vfont_builtin_register(void *mem, int size)
121 {
122         builtin_font_data = mem;
123         builtin_font_size = size;
124 }
125
126 static PackedFile *get_builtin_packedfile(void)
127 {
128         if (!builtin_font_data) {
129                 printf("Internal error, builtin font not loaded\n");
130
131                 return NULL;
132         }
133         else {
134                 void *mem = MEM_mallocN(builtin_font_size, "vfd_builtin");
135
136                 memcpy(mem, builtin_font_data, builtin_font_size);
137         
138                 return newPackedFileMemory(mem, builtin_font_size);
139         }
140 }
141
142 static VFontData *vfont_get_data(Main *bmain, VFont *vfont)
143 {
144         if (vfont == NULL) {
145                 return NULL;
146         }
147
148         /* And then set the data */
149         if (!vfont->data) {
150                 PackedFile *pf;
151
152                 BLI_rw_mutex_lock(&vfont_rwlock, THREAD_LOCK_WRITE);
153
154                 if (vfont->data) {
155                         /* Check data again, since it might have been already
156                          * initialized from other thread (previous check is
157                          * not accurate or threading, just prevents unneeded
158                          * lock if all the data is here for sure).
159                          */
160                         BLI_rw_mutex_unlock(&vfont_rwlock);
161                         return vfont->data;
162                 }
163
164                 if (BKE_vfont_is_builtin(vfont)) {
165                         pf = get_builtin_packedfile();
166                 }
167                 else {
168                         if (vfont->packedfile) {
169                                 pf = vfont->packedfile;
170
171                                 /* We need to copy a tmp font to memory unless it is already there */
172                                 if (vfont->temp_pf == NULL) {
173                                         vfont->temp_pf = dupPackedFile(pf);
174                                 }
175                         }
176                         else {
177                                 pf = newPackedFile(NULL, vfont->name, ID_BLEND_PATH(bmain, &vfont->id));
178
179                                 if (vfont->temp_pf == NULL) {
180                                         vfont->temp_pf = newPackedFile(NULL, vfont->name, ID_BLEND_PATH(bmain, &vfont->id));
181                                 }
182                         }
183                         if (!pf) {
184                                 printf("Font file doesn't exist: %s\n", vfont->name);
185
186                                 /* DON'T DO THIS
187                                  * missing file shouldn't modifty path! - campbell */
188 #if 0
189                                 strcpy(vfont->name, FO_BUILTIN_NAME);
190 #endif
191                                 pf = get_builtin_packedfile();
192                         }
193                 }
194                 
195                 if (pf) {
196                         vfont->data = BLI_vfontdata_from_freetypefont(pf);
197                         if (pf != vfont->packedfile) {
198                                 freePackedFile(pf);
199                         }
200                 }
201
202                 BLI_rw_mutex_unlock(&vfont_rwlock);
203         }
204
205         return vfont->data;
206 }
207
208 VFont *BKE_vfont_load(Main *bmain, const char *name)
209 {
210         char filename[FILE_MAXFILE];
211         VFont *vfont = NULL;
212         PackedFile *pf;
213         PackedFile *temp_pf = NULL;
214         int is_builtin;
215         
216         if (STREQ(name, FO_BUILTIN_NAME)) {
217                 BLI_strncpy(filename, name, sizeof(filename));
218                 
219                 pf = get_builtin_packedfile();
220                 is_builtin = TRUE;
221         }
222         else {
223                 BLI_split_file_part(name, filename, sizeof(filename));
224                 pf = newPackedFile(NULL, name, bmain->name);
225                 temp_pf = newPackedFile(NULL, name, bmain->name);
226                 
227                 is_builtin = FALSE;
228         }
229
230         if (pf) {
231                 VFontData *vfd;
232
233                 vfd = BLI_vfontdata_from_freetypefont(pf);
234                 if (vfd) {
235                         vfont = BKE_libblock_alloc(&bmain->vfont, ID_VF, filename);
236                         vfont->data = vfd;
237
238                         /* if there's a font name, use it for the ID name */
239                         if (vfd->name[0] != '\0') {
240                                 BLI_strncpy(vfont->id.name + 2, vfd->name, sizeof(vfont->id.name) - 2);
241                         }
242                         BLI_strncpy(vfont->name, name, sizeof(vfont->name));
243
244                         /* if autopack is on store the packedfile in de font structure */
245                         if (!is_builtin && (G.fileflags & G_AUTOPACK)) {
246                                 vfont->packedfile = pf;
247                         }
248
249                         /* Do not add FO_BUILTIN_NAME to temporary listbase */
250                         if (strcmp(filename, FO_BUILTIN_NAME)) {
251                                 vfont->temp_pf = temp_pf;
252                         }
253                 }
254
255                 /* Free the packed file */
256                 if (!vfont || vfont->packedfile != pf) {
257                         freePackedFile(pf);
258                 }
259         }
260         
261         return vfont;
262 }
263
264 static VFont *which_vfont(Curve *cu, CharInfo *info)
265 {
266         switch (info->flag & (CU_CHINFO_BOLD | CU_CHINFO_ITALIC)) {
267                 case CU_CHINFO_BOLD:
268                         return cu->vfontb ? cu->vfontb : cu->vfont;
269                 case CU_CHINFO_ITALIC:
270                         return cu->vfonti ? cu->vfonti : cu->vfont;
271                 case (CU_CHINFO_BOLD | CU_CHINFO_ITALIC):
272                         return cu->vfontbi ? cu->vfontbi : cu->vfont;
273                 default:
274                         return cu->vfont;
275         }
276 }
277
278 VFont *BKE_vfont_builtin_get(void)
279 {
280         VFont *vfont;
281         
282         for (vfont = G.main->vfont.first; vfont; vfont = vfont->id.next) {
283                 if (BKE_vfont_is_builtin(vfont)) {
284                         return vfont;
285                 }
286         }
287         
288         return BKE_vfont_load(G.main, FO_BUILTIN_NAME);
289 }
290
291 static VChar *find_vfont_char(VFontData *vfd, unsigned int character)
292 {
293         return BLI_ghash_lookup(vfd->characters, SET_UINT_IN_POINTER(character));
294 }
295                 
296 static void build_underline(Curve *cu, float x1, float y1, float x2, float y2, int charidx, short mat_nr)
297 {
298         Nurb *nu2;
299         BPoint *bp;
300         
301         nu2 = (Nurb *) MEM_callocN(sizeof(Nurb), "underline_nurb");
302         if (nu2 == NULL) return;
303         nu2->resolu = cu->resolu;
304         nu2->bezt = NULL;
305         nu2->knotsu = nu2->knotsv = NULL;
306         nu2->flag = CU_2D;
307         nu2->charidx = charidx + 1000;
308         if (mat_nr > 0) nu2->mat_nr = mat_nr - 1;
309         nu2->pntsu = 4;
310         nu2->pntsv = 1;
311         nu2->orderu = 4;
312         nu2->orderv = 1;
313         nu2->flagu = CU_NURB_CYCLIC;
314
315         bp = (BPoint *)MEM_callocN(4 * sizeof(BPoint), "underline_bp");
316         if (bp == NULL) {
317                 MEM_freeN(nu2);
318                 return;
319         }
320
321         copy_v4_fl4(bp[0].vec, x1, y1, 0.0f, 1.0f);
322         copy_v4_fl4(bp[1].vec, x2, y1, 0.0f, 1.0f);
323         copy_v4_fl4(bp[2].vec, x2, y2, 0.0f, 1.0f);
324         copy_v4_fl4(bp[3].vec, x1, y2, 0.0f, 1.0f);
325
326         nu2->bp = bp;
327         BLI_addtail(&(cu->nurb), nu2);
328
329 }
330
331 static void buildchar(Main *bmain, Curve *cu, unsigned int character, CharInfo *info,
332                       float ofsx, float ofsy, float rot, int charidx)
333 {
334         BezTriple *bezt1, *bezt2;
335         Nurb *nu1 = NULL, *nu2 = NULL;
336         float *fp, fsize, shear, x, si, co;
337         VFontData *vfd = NULL;
338         VChar *che = NULL;
339         int i;
340
341         vfd = vfont_get_data(bmain, which_vfont(cu, info));
342         if (!vfd) return;
343
344 #if 0
345         if (cu->selend < cu->selstart) {
346                 if ((charidx >= (cu->selend)) && (charidx <= (cu->selstart - 2)))
347                         sel = 1;
348         }
349         else {
350                 if ((charidx >= (cu->selstart - 1)) && (charidx <= (cu->selend - 1)))
351                         sel = 1;
352         }
353 #endif
354
355         /* make a copy at distance ofsx, ofsy with shear */
356         fsize = cu->fsize;
357         shear = cu->shear;
358         si = sinf(rot);
359         co = cosf(rot);
360
361         che = find_vfont_char(vfd, character);
362         
363         /* Select the glyph data */
364         if (che)
365                 nu1 = che->nurbsbase.first;
366
367         /* Create the character */
368         while (nu1) {
369                 bezt1 = nu1->bezt;
370                 if (bezt1) {
371                         nu2 = (Nurb *) MEM_mallocN(sizeof(Nurb), "duplichar_nurb");
372                         if (nu2 == NULL) break;
373                         memcpy(nu2, nu1, sizeof(struct Nurb));
374                         nu2->resolu = cu->resolu;
375                         nu2->bp = NULL;
376                         nu2->knotsu = nu2->knotsv = NULL;
377                         nu2->flag = CU_SMOOTH;
378                         nu2->charidx = charidx;
379                         if (info->mat_nr > 0) {
380                                 nu2->mat_nr = info->mat_nr - 1;
381                         }
382                         else {
383                                 nu2->mat_nr = 0;
384                         }
385                         /* nu2->trim.first = 0; */
386                         /* nu2->trim.last = 0; */
387                         i = nu2->pntsu;
388
389                         bezt2 = (BezTriple *)MEM_mallocN(i * sizeof(BezTriple), "duplichar_bezt2");
390                         if (bezt2 == NULL) {
391                                 MEM_freeN(nu2);
392                                 break;
393                         }
394                         memcpy(bezt2, bezt1, i * sizeof(struct BezTriple));
395                         nu2->bezt = bezt2;
396                         
397                         if (shear != 0.0f) {
398                                 bezt2 = nu2->bezt;
399                                 
400                                 for (i = nu2->pntsu; i > 0; i--) {
401                                         bezt2->vec[0][0] += shear * bezt2->vec[0][1];
402                                         bezt2->vec[1][0] += shear * bezt2->vec[1][1];
403                                         bezt2->vec[2][0] += shear * bezt2->vec[2][1];
404                                         bezt2++;
405                                 }
406                         }
407                         if (rot != 0.0f) {
408                                 bezt2 = nu2->bezt;
409                                 for (i = nu2->pntsu; i > 0; i--) {
410                                         fp = bezt2->vec[0];
411
412                                         x = fp[0];
413                                         fp[0] = co * x + si * fp[1];
414                                         fp[1] = -si * x + co * fp[1];
415                                         x = fp[3];
416                                         fp[3] = co * x + si * fp[4];
417                                         fp[4] = -si * x + co * fp[4];
418                                         x = fp[6];
419                                         fp[6] = co * x + si * fp[7];
420                                         fp[7] = -si * x + co * fp[7];
421
422                                         bezt2++;
423                                 }
424                         }
425                         bezt2 = nu2->bezt;
426
427                         if (info->flag & CU_CHINFO_SMALLCAPS_CHECK) {
428                                 const float sca = cu->smallcaps_scale;
429                                 for (i = nu2->pntsu; i > 0; i--) {
430                                         fp = bezt2->vec[0];
431                                         fp[0] *= sca;
432                                         fp[1] *= sca;
433                                         fp[3] *= sca;
434                                         fp[4] *= sca;
435                                         fp[6] *= sca;
436                                         fp[7] *= sca;
437                                         bezt2++;
438                                 }
439                         }
440                         bezt2 = nu2->bezt;
441
442                         for (i = nu2->pntsu; i > 0; i--) {
443                                 fp = bezt2->vec[0];
444                                 fp[0] = (fp[0] + ofsx) * fsize;
445                                 fp[1] = (fp[1] + ofsy) * fsize;
446                                 fp[3] = (fp[3] + ofsx) * fsize;
447                                 fp[4] = (fp[4] + ofsy) * fsize;
448                                 fp[6] = (fp[6] + ofsx) * fsize;
449                                 fp[7] = (fp[7] + ofsy) * fsize;
450                                 bezt2++;
451                         }
452                         
453                         BLI_addtail(&(cu->nurb), nu2);
454                 }
455                 
456                 nu1 = nu1->next;
457         }
458 }
459
460 int BKE_vfont_select_get(Object *ob, int *start, int *end)
461 {
462         Curve *cu = ob->data;
463         
464         if (cu->editfont == NULL || ob->type != OB_FONT) return 0;
465
466         BLI_assert(cu->selstart >= 0 && cu->selstart <= cu->len + 1);
467         BLI_assert(cu->selend   >= 0 && cu->selend   <= cu->len + 1);
468         BLI_assert(cu->pos      >= 0 && cu->pos      <= cu->len);
469
470         if (cu->selstart == 0) return 0;
471         if (cu->selstart <= cu->selend) {
472                 *start = cu->selstart - 1;
473                 *end = cu->selend - 1;
474                 return 1;
475         }
476         else {
477                 *start = cu->selend;
478                 *end = cu->selstart - 2;
479                 return -1;
480         }
481 }
482
483 static float char_width(Curve *cu, VChar *che, CharInfo *info)
484 {
485         /* The character wasn't found, propably ascii = 0, then the width shall be 0 as well */
486         if (che == NULL) {
487                 return 0.0f;
488         }
489         else if (info->flag & CU_CHINFO_SMALLCAPS_CHECK) {
490                 return che->width * cu->smallcaps_scale;
491         }
492         else {
493                 return che->width;
494         }
495 }
496
497 struct CharTrans *BKE_vfont_to_curve(Main *bmain, Scene *scene, Object *ob, int mode)
498 {
499         VFont *vfont, *oldvfont;
500         VFontData *vfd = NULL;
501         Curve *cu;
502         CharInfo *info = NULL, *custrinfo;
503         TextBox *tb;
504         VChar *che;
505         struct CharTrans *chartransdata = NULL, *ct;
506         float *f, xof, yof, xtrax, linedist, *linedata, *linedata2, *linedata3, *linedata4;
507         float twidth, maxlen = 0;
508         int i, slen, j;
509         int curbox;
510         int selstart, selend;
511         int utf8len;
512         short cnr = 0, lnr = 0, wsnr = 0;
513         wchar_t *mem, *tmp, ascii;
514
515         /* remark: do calculations including the trailing '\0' of a string
516          * because the cursor can be at that location */
517
518         if (ob->type != OB_FONT) return NULL;
519
520         /* Set font data */
521         cu = (Curve *) ob->data;
522         vfont = cu->vfont;
523
524         if (cu->str == NULL) return NULL;
525         if (vfont == NULL) return NULL;
526
527         /* Create unicode string */
528         utf8len = BLI_strlen_utf8(cu->str);
529         mem = MEM_mallocN(((utf8len + 1) * sizeof(wchar_t)), "convertedmem");
530
531         slen = BLI_strncpy_wchar_from_utf8(mem, cu->str, utf8len + 1);
532
533         if (cu->ulheight == 0.0f)
534                 cu->ulheight = 0.05f;
535         
536         if (cu->strinfo == NULL) /* old file */
537                 cu->strinfo = MEM_callocN((slen + 4) * sizeof(CharInfo), "strinfo compat");
538         
539         custrinfo = cu->strinfo;
540         if (cu->editfont)
541                 custrinfo = cu->editfont->textbufinfo;
542         
543         if (cu->tb == NULL)
544                 cu->tb = MEM_callocN(MAXTEXTBOX * sizeof(TextBox), "TextBox compat");
545
546         vfd = vfont_get_data(bmain, vfont);
547
548         /* The VFont Data can not be found */
549         if (!vfd) {
550                 if (mem)
551                         MEM_freeN(mem);
552                 return NULL;
553         }
554
555         /* calc offset and rotation of each char */
556         ct = chartransdata =
557                  (struct CharTrans *)MEM_callocN((slen + 1) * sizeof(struct CharTrans), "buildtext");
558
559         /* We assume the worst case: 1 character per line (is freed at end anyway) */
560
561         linedata  = MEM_mallocN(sizeof(float) * (slen * 2 + 1), "buildtext2");
562         linedata2 = MEM_mallocN(sizeof(float) * (slen * 2 + 1), "buildtext3");
563         linedata3 = MEM_callocN(sizeof(float) * (slen * 2 + 1), "buildtext4");
564         linedata4 = MEM_callocN(sizeof(float) * (slen * 2 + 1), "buildtext5");
565         
566         linedist = cu->linedist;
567         
568         xof = cu->xof + (cu->tb[0].x / cu->fsize);
569         yof = cu->yof + (cu->tb[0].y / cu->fsize);
570
571         xtrax = 0.5f * cu->spacing - 0.5f;
572
573         oldvfont = NULL;
574
575         for (i = 0; i < slen; i++) custrinfo[i].flag &= ~(CU_CHINFO_WRAP | CU_CHINFO_SMALLCAPS_CHECK);
576
577         if (cu->selboxes) MEM_freeN(cu->selboxes);
578         cu->selboxes = NULL;
579         if (BKE_vfont_select_get(ob, &selstart, &selend))
580                 cu->selboxes = MEM_callocN((selend - selstart + 1) * sizeof(SelBox), "font selboxes");
581
582         tb = &(cu->tb[0]);
583         curbox = 0;
584         for (i = 0; i <= slen; i++) {
585 makebreak:
586                 /* Characters in the list */
587                 info = &(custrinfo[i]);
588                 ascii = mem[i];
589                 if (info->flag & CU_CHINFO_SMALLCAPS) {
590                         ascii = towupper(ascii);
591                         if (mem[i] != ascii) {
592                                 mem[i] = ascii;
593                                 info->flag |= CU_CHINFO_SMALLCAPS_CHECK;
594                         }
595                 }
596
597                 vfont = which_vfont(cu, info);
598                 
599                 if (vfont == NULL) break;
600
601                 if (!ELEM(ascii, '\n', '\0')) {
602                         BLI_rw_mutex_lock(&vfont_rwlock, THREAD_LOCK_READ);
603                         che = find_vfont_char(vfd, ascii);
604                         BLI_rw_mutex_unlock(&vfont_rwlock);
605
606                         /*
607                          * The character wasn't in the current curve base so load it
608                          * But if the font is built-in then do not try loading since
609                          * whole font is in the memory already
610                          */
611                         if (che == NULL && BKE_vfont_is_builtin(vfont) == false) {
612                                 BLI_rw_mutex_lock(&vfont_rwlock, THREAD_LOCK_WRITE);
613                                 /* Check it once again, char might have been already load
614                                  * between previous BLI_rw_mutex_unlock() and this BLI_rw_mutex_lock().
615                                  *
616                                  * Such a check should not be a bottleneck since it wouldn't
617                                  * happen often once all the chars are load.
618                                  */
619                                 if ((che = find_vfont_char(vfd, ascii)) == NULL) {
620                                         che = BLI_vfontchar_from_freetypefont(vfont, ascii);
621                                 }
622                                 BLI_rw_mutex_unlock(&vfont_rwlock);
623                         }
624                 }
625                 else {
626                         che = NULL;
627                 }
628
629                 /* No VFont found */
630                 if (vfont == NULL) {
631                         if (mem)
632                                 MEM_freeN(mem);
633                         MEM_freeN(chartransdata);
634                         return NULL;
635                 }
636
637                 if (vfont != oldvfont) {
638                         vfd = vfont_get_data(bmain, vfont);
639                         oldvfont = vfont;
640                 }
641
642                 /* VFont Data for VFont couldn't be found */
643                 if (!vfd) {
644                         if (mem)
645                                 MEM_freeN(mem);
646                         MEM_freeN(chartransdata);
647                         return NULL;
648                 }
649
650                 twidth = char_width(cu, che, info);
651
652                 /* Calculate positions */
653                 if ((tb->w != 0.0f) &&
654                     (ct->dobreak == 0) &&
655                     (((xof - (tb->x / cu->fsize) + twidth) * cu->fsize) > tb->w + cu->xof * cu->fsize))
656                 {
657                         //              fprintf(stderr, "linewidth exceeded: %c%c%c...\n", mem[i], mem[i+1], mem[i+2]);
658                         for (j = i; j && (mem[j] != '\n') && (mem[j] != '\r') && (chartransdata[j].dobreak == 0); j--) {
659                                 if (mem[j] == ' ' || mem[j] == '-') {
660                                         ct -= (i - (j - 1));
661                                         cnr -= (i - (j - 1));
662                                         if (mem[j] == ' ') wsnr--;
663                                         if (mem[j] == '-') wsnr++;
664                                         i = j - 1;
665                                         xof = ct->xof;
666                                         ct[1].dobreak = 1;
667                                         custrinfo[i + 1].flag |= CU_CHINFO_WRAP;
668                                         goto makebreak;
669                                 }
670                                 if (chartransdata[j].dobreak) {
671                                         //                              fprintf(stderr, "word too long: %c%c%c...\n", mem[j], mem[j+1], mem[j+2]);
672                                         ct->dobreak = 1;
673                                         custrinfo[i + 1].flag |= CU_CHINFO_WRAP;
674                                         ct -= 1;
675                                         cnr -= 1;
676                                         i--;
677                                         xof = ct->xof;
678                                         goto makebreak;
679                                 }
680                         }
681                 }
682
683                 if (ascii == '\n' || ascii == '\r' || ascii == 0 || ct->dobreak) {
684                         ct->xof = xof;
685                         ct->yof = yof;
686                         ct->linenr = lnr;
687                         ct->charnr = cnr;
688
689                         yof -= linedist;
690
691                         maxlen = max_ff(maxlen, (xof - tb->x / cu->fsize));
692                         linedata[lnr] = xof - tb->x / cu->fsize;
693                         linedata2[lnr] = cnr;
694                         linedata3[lnr] = tb->w / cu->fsize;
695                         linedata4[lnr] = wsnr;
696                         
697                         if ((tb->h != 0.0f) &&
698                             ((-(yof - (tb->y / cu->fsize))) > ((tb->h / cu->fsize) - (linedist * cu->fsize)) - cu->yof) &&
699                             (cu->totbox > (curbox + 1)) )
700                         {
701                                 maxlen = 0;
702                                 tb++;
703                                 curbox++;
704                                 yof = cu->yof + tb->y / cu->fsize;
705                         }
706
707                         /* XXX, has been unused for years, need to check if this is useful, r4613 r5282 - campbell */
708 #if 0
709                         if (ascii == '\n' || ascii == '\r')
710                                 xof = cu->xof;
711                         else
712                                 xof = cu->xof + (tb->x / cu->fsize);
713 #else
714                         xof = cu->xof + (tb->x / cu->fsize);
715 #endif
716                         lnr++;
717                         cnr = 0;
718                         wsnr = 0;
719                 }
720                 else if (ascii == 9) {    /* TAB */
721                         float tabfac;
722                         
723                         ct->xof = xof;
724                         ct->yof = yof;
725                         ct->linenr = lnr;
726                         ct->charnr = cnr++;
727
728                         tabfac = (xof - cu->xof + 0.01f);
729                         tabfac = 2.0f * ceilf(tabfac / 2.0f);
730                         xof = cu->xof + tabfac;
731                 }
732                 else {
733                         SelBox *sb = NULL;
734                         float wsfac;
735
736                         ct->xof = xof;
737                         ct->yof = yof;
738                         ct->linenr = lnr;
739                         ct->charnr = cnr++;
740
741                         if (cu->selboxes && (i >= selstart) && (i <= selend)) {
742                                 sb = &(cu->selboxes[i - selstart]);
743                                 sb->y = yof * cu->fsize - linedist * cu->fsize * 0.1f;
744                                 sb->h = linedist * cu->fsize;
745                                 sb->w = xof * cu->fsize;
746                         }
747         
748                         if (ascii == 32) {
749                                 wsfac = cu->wordspace; 
750                                 wsnr++;
751                         }
752                         else {
753                                 wsfac = 1.0f;
754                         }
755                         
756                         /* Set the width of the character */
757                         twidth = char_width(cu, che, info);
758
759                         xof += (twidth * wsfac * (1.0f + (info->kern / 40.0f)) ) + xtrax;
760                         
761                         if (sb) {
762                                 sb->w = (xof * cu->fsize) - sb->w;
763                         }
764                 }
765                 ct++;
766         }
767         
768         cu->lines = 1;
769         ct = chartransdata;
770         tmp = mem;
771         for (i = 0; i <= slen; i++, tmp++, ct++) {
772                 ascii = *tmp;
773                 if (ascii == '\n' || ascii == '\r' || ct->dobreak) cu->lines++;
774         }
775
776         /* linedata is now: width of line
777          * linedata2 is now: number of characters
778          * linedata3 is now: maxlen of that line
779          * linedata4 is now: number of whitespaces of line */
780
781         if (cu->spacemode != CU_LEFT) {
782                 ct = chartransdata;
783
784                 if (cu->spacemode == CU_RIGHT) {
785                         for (i = 0; i < lnr; i++) linedata[i] = linedata3[i] - linedata[i];
786                         for (i = 0; i <= slen; i++) {
787                                 ct->xof += linedata[ct->linenr];
788                                 ct++;
789                         }
790                 }
791                 else if (cu->spacemode == CU_MIDDLE) {
792                         for (i = 0; i < lnr; i++) linedata[i] = (linedata3[i] - linedata[i]) / 2;
793                         for (i = 0; i <= slen; i++) {
794                                 ct->xof += linedata[ct->linenr];
795                                 ct++;
796                         }
797                 }
798                 else if ((cu->spacemode == CU_FLUSH) && (cu->tb[0].w != 0.0f)) {
799                         for (i = 0; i < lnr; i++)
800                                 if (linedata2[i] > 1)
801                                         linedata[i] = (linedata3[i] - linedata[i]) / (linedata2[i] - 1);
802                         for (i = 0; i <= slen; i++) {
803                                 for (j = i; (!ELEM3(mem[j], '\0', '\n', '\r')) && (chartransdata[j].dobreak == 0) && (j < slen); j++) {
804                                         /* do nothing */
805                                 }
806
807 //                              if ((mem[j] != '\r') && (mem[j] != '\n') && (mem[j])) {
808                                 ct->xof += ct->charnr * linedata[ct->linenr];
809 //                              }
810                                 ct++;
811                         }
812                 }
813                 else if ((cu->spacemode == CU_JUSTIFY) && (cu->tb[0].w != 0.0f)) {
814                         float curofs = 0.0f;
815                         for (i = 0; i <= slen; i++) {
816                                 for (j = i; (mem[j]) && (mem[j] != '\n') &&
817                                      (mem[j] != '\r') && (chartransdata[j].dobreak == 0) && (j < slen);
818                                      j++)
819                                 {
820                                         /* pass */
821                                 }
822
823                                 if ((mem[j] != '\r') && (mem[j] != '\n') &&
824                                     ((chartransdata[j].dobreak != 0)))
825                                 {
826                                         if (mem[i] == ' ') curofs += (linedata3[ct->linenr] - linedata[ct->linenr]) / linedata4[ct->linenr];
827                                         ct->xof += curofs;
828                                 }
829                                 if (mem[i] == '\n' || mem[i] == '\r' || chartransdata[i].dobreak) curofs = 0;
830                                 ct++;
831                         }
832                 }
833         }
834         
835         /* TEXT ON CURVE */
836         /* Note: Only OB_CURVE objects could have a path  */
837         if (cu->textoncurve && cu->textoncurve->type == OB_CURVE) {
838                 Curve *cucu = cu->textoncurve->data;
839                 int oldflag = cucu->flag;
840                 
841                 cucu->flag |= (CU_PATH + CU_FOLLOW);
842                 
843                 if (cu->textoncurve->curve_cache == NULL || cu->textoncurve->curve_cache->path == NULL) {
844                         BKE_displist_make_curveTypes(scene, cu->textoncurve, 0);
845                 }
846                 if (cu->textoncurve->curve_cache->path) {
847                         float distfac, imat[4][4], imat3[3][3], cmat[3][3];
848                         float minx, maxx, miny, maxy;
849                         float timeofs, sizefac;
850                         
851                         invert_m4_m4(imat, ob->obmat);
852                         copy_m3_m4(imat3, imat);
853
854                         copy_m3_m4(cmat, cu->textoncurve->obmat);
855                         mul_m3_m3m3(cmat, cmat, imat3);
856                         sizefac = normalize_v3(cmat[0]) / cu->fsize;
857                         
858                         minx = miny = 1.0e20f;
859                         maxx = maxy = -1.0e20f;
860                         ct = chartransdata;
861                         for (i = 0; i <= slen; i++, ct++) {
862                                 if (minx > ct->xof) minx = ct->xof;
863                                 if (maxx < ct->xof) maxx = ct->xof;
864                                 if (miny > ct->yof) miny = ct->yof;
865                                 if (maxy < ct->yof) maxy = ct->yof;
866                         }
867                         
868                         /* we put the x-coordinaat exact at the curve, the y is rotated */
869                         
870                         /* length correction */
871                         distfac = sizefac * cu->textoncurve->curve_cache->path->totdist / (maxx - minx);
872                         timeofs = 0.0f;
873                         
874                         if (distfac > 1.0f) {
875                                 /* path longer than text: spacemode involves */
876                                 distfac = 1.0f / distfac;
877                                 
878                                 if (cu->spacemode == CU_RIGHT) {
879                                         timeofs = 1.0f - distfac;
880                                 }
881                                 else if (cu->spacemode == CU_MIDDLE) {
882                                         timeofs = (1.0f - distfac) / 2.0f;
883                                 }
884                                 else if (cu->spacemode == CU_FLUSH) {
885                                         distfac = 1.0f;
886                                 }
887                         }
888                         else {
889                                 distfac = 1.0;
890                         }
891
892                         distfac /= (maxx - minx);
893                         
894                         timeofs += distfac * cu->xof;  /* not cyclic */
895                         
896                         ct = chartransdata;
897                         for (i = 0; i <= slen; i++, ct++) {
898                                 float ctime, dtime, vec[4], tvec[4], rotvec[3];
899                                 float si, co;
900                                 
901                                 /* rotate around center character */
902                                 ascii = mem[i];
903
904                                 che = find_vfont_char(vfd, ascii);
905         
906                                 twidth = char_width(cu, che, info);
907
908                                 dtime = distfac * 0.5f * twidth;
909
910                                 ctime = timeofs + distfac * (ct->xof - minx);
911                                 CLAMP(ctime, 0.0f, 1.0f);
912
913                                 /* calc the right loc AND the right rot separately */
914                                 /* vec, tvec need 4 items */
915                                 where_on_path(cu->textoncurve, ctime, vec, tvec, NULL, NULL, NULL);
916                                 where_on_path(cu->textoncurve, ctime + dtime, tvec, rotvec, NULL, NULL, NULL);
917                                 
918                                 mul_v3_fl(vec, sizefac);
919                                 
920                                 ct->rot = (float)M_PI - atan2f(rotvec[1], rotvec[0]);
921
922                                 si = sinf(ct->rot);
923                                 co = cosf(ct->rot);
924
925                                 yof = ct->yof;
926                                 
927                                 ct->xof = vec[0] + si * yof;
928                                 ct->yof = vec[1] + co * yof;
929                                 
930                         }
931                         cucu->flag = oldflag;
932                 }
933         }
934
935         if (cu->selboxes) {
936                 ct = chartransdata;
937                 for (i = 0; i <= selend; i++, ct++) {
938                         if (i >= selstart) {
939                                 cu->selboxes[i - selstart].x = ct->xof * cu->fsize;
940                                 cu->selboxes[i - selstart].y = ct->yof * cu->fsize;
941                         }
942                 }
943         }
944
945         if (mode == FO_CURSUP || mode == FO_CURSDOWN || mode == FO_PAGEUP || mode == FO_PAGEDOWN) {
946                 /* 2: curs up
947                  * 3: curs down */
948                 ct = chartransdata + cu->pos;
949                 
950                 if ((mode == FO_CURSUP || mode == FO_PAGEUP) && ct->linenr == 0) {
951                         /* pass */
952                 }
953                 else if ((mode == FO_CURSDOWN || mode == FO_PAGEDOWN) && ct->linenr == lnr) {
954                         /* pass */
955                 }
956                 else {
957                         switch (mode) {
958                                 case FO_CURSUP:     lnr = ct->linenr - 1; break;
959                                 case FO_CURSDOWN:   lnr = ct->linenr + 1; break;
960                                 case FO_PAGEUP:     lnr = ct->linenr - 10; break;
961                                 case FO_PAGEDOWN:   lnr = ct->linenr + 10; break;
962                         }
963                         cnr = ct->charnr;
964                         /* seek for char with lnr en cnr */
965                         cu->pos = 0;
966                         ct = chartransdata;
967                         for (i = 0; i < slen; i++) {
968                                 if (ct->linenr == lnr) {
969                                         if ((ct->charnr == cnr) || ((ct + 1)->charnr == 0)) {
970                                                 break;
971                                         }
972                                 }
973                                 else if (ct->linenr > lnr) {
974                                         break;
975                                 }
976                                 cu->pos++;
977                                 ct++;
978                         }
979                 }
980         }
981         
982         /* cursor first */
983         if (cu->editfont) {
984                 float si, co;
985                 
986                 ct = chartransdata + cu->pos;
987                 si = sinf(ct->rot);
988                 co = cosf(ct->rot);
989
990                 f = cu->editfont->textcurs[0];
991                 
992                 f[0] = cu->fsize * (-0.1f * co + ct->xof);
993                 f[1] = cu->fsize * ( 0.1f * si + ct->yof);
994                 
995                 f[2] = cu->fsize * ( 0.1f * co + ct->xof);
996                 f[3] = cu->fsize * (-0.1f * si + ct->yof);
997                 
998                 f[4] = cu->fsize * ( 0.1f * co + 0.8f * si + ct->xof);
999                 f[5] = cu->fsize * (-0.1f * si + 0.8f * co + ct->yof);
1000                 
1001                 f[6] = cu->fsize * (-0.1f * co + 0.8f * si + ct->xof);
1002                 f[7] = cu->fsize * ( 0.1f * si + 0.8f * co + ct->yof);
1003                 
1004         }
1005
1006         MEM_freeN(linedata);
1007         MEM_freeN(linedata2);
1008         MEM_freeN(linedata3);
1009         MEM_freeN(linedata4);
1010
1011         if (mode == FO_SELCHANGE) {
1012                 MEM_freeN(chartransdata);
1013                 MEM_freeN(mem);
1014                 return NULL;
1015         }
1016
1017         if (mode == FO_EDIT) {
1018                 /* make nurbdata */
1019                 BKE_nurbList_free(&cu->nurb);
1020                 
1021                 ct = chartransdata;
1022                 if (cu->sepchar == 0) {
1023                         for (i = 0; i < slen; i++) {
1024                                 unsigned int cha = (unsigned int) mem[i];
1025                                 info = &(custrinfo[i]);
1026                                 if (info->mat_nr > (ob->totcol)) {
1027                                         /* printf("Error: Illegal material index (%d) in text object, setting to 0\n", info->mat_nr); */
1028                                         info->mat_nr = 0;
1029                                 }
1030                                 /* We do not want to see any character for \n or \r */
1031                                 if (cha != '\n' && cha != '\r')
1032                                         buildchar(bmain, cu, cha, info, ct->xof, ct->yof, ct->rot, i);
1033                                 
1034                                 if ((info->flag & CU_CHINFO_UNDERLINE) && (cu->textoncurve == NULL) && (cha != '\n') && (cha != '\r')) {
1035                                         float ulwidth, uloverlap = 0.0f;
1036                                         
1037                                         if ((i < (slen - 1)) && (mem[i + 1] != '\n') && (mem[i + 1] != '\r') &&
1038                                             ((mem[i + 1] != ' ') || (custrinfo[i + 1].flag & CU_CHINFO_UNDERLINE)) &&
1039                                             ((custrinfo[i + 1].flag & CU_CHINFO_WRAP) == 0))
1040                                         {
1041                                                 uloverlap = xtrax + 0.1f;
1042                                         }
1043                                         /* Find the character, the characters has to be in the memory already
1044                                          * since character checking has been done earlier already. */
1045                                         che = find_vfont_char(vfd, cha);
1046
1047                                         twidth = char_width(cu, che, info);
1048                                         ulwidth = cu->fsize * ((twidth * (1.0f + (info->kern / 40.0f))) + uloverlap);
1049                                         build_underline(cu, ct->xof * cu->fsize, ct->yof * cu->fsize + (cu->ulpos - 0.05f) * cu->fsize,
1050                                                         ct->xof * cu->fsize + ulwidth,
1051                                                         ct->yof * cu->fsize + (cu->ulpos - 0.05f) * cu->fsize - cu->ulheight * cu->fsize,
1052                                                         i, info->mat_nr);
1053                                 }
1054                                 ct++;
1055                         }
1056                 }
1057                 else {
1058                         int outta = 0;
1059                         for (i = 0; (i < slen) && (outta == 0); i++) {
1060                                 ascii = mem[i];
1061                                 info = &(custrinfo[i]);
1062                                 if (cu->sepchar == (i + 1)) {
1063                                         float vecyo[3];
1064
1065                                         vecyo[0] = ct->xof;
1066                                         vecyo[1] = ct->yof;
1067                                         vecyo[2] = 0.0f;
1068
1069                                         mem[0] = ascii;
1070                                         mem[1] = 0;
1071                                         custrinfo[0] = *info;
1072                                         cu->pos = 1;
1073                                         cu->len = 1;
1074                                         mul_v3_m4v3(ob->loc, ob->obmat, vecyo);
1075                                         outta = 1;
1076                                         cu->sepchar = 0;
1077                                 }
1078                                 ct++;
1079                         }
1080                 }
1081         }
1082
1083         if (mode == FO_DUPLI) {
1084                 MEM_freeN(mem);
1085                 return chartransdata;
1086         }
1087
1088         if (mem)
1089                 MEM_freeN(mem);
1090
1091         MEM_freeN(chartransdata);
1092         return NULL;
1093 }