2 * Copyright (C) 2000, Matias Atria
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
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.
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
16 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
32 typedef int (*DviCommand) __PROTO((DviContext *, int));
34 #define DVICMDDEF(x) static int x __PROTO((DviContext *, int))
41 DVICMDDEF(move_right);
52 DVICMDDEF(unexpected);
54 static const DviCommand dvi_commands[] = {
55 set_char, set_char, set_char, set_char,
56 set_char, set_char, set_char, set_char,
57 set_char, set_char, set_char, set_char,
58 set_char, set_char, set_char, set_char,
59 set_char, set_char, set_char, set_char,
60 set_char, set_char, set_char, set_char,
61 set_char, set_char, set_char, set_char,
62 set_char, set_char, set_char, set_char,
63 set_char, set_char, set_char, set_char,
64 set_char, set_char, set_char, set_char,
65 set_char, set_char, set_char, set_char,
66 set_char, set_char, set_char, set_char,
67 set_char, set_char, set_char, set_char,
68 set_char, set_char, set_char, set_char,
69 set_char, set_char, set_char, set_char,
70 set_char, set_char, set_char, set_char,
71 set_char, set_char, set_char, set_char,
72 set_char, set_char, set_char, set_char,
73 set_char, set_char, set_char, set_char,
74 set_char, set_char, set_char, set_char,
75 set_char, set_char, set_char, set_char,
76 set_char, set_char, set_char, set_char,
77 set_char, set_char, set_char, set_char,
78 set_char, set_char, set_char, set_char,
79 set_char, set_char, set_char, set_char,
80 set_char, set_char, set_char, set_char,
81 set_char, set_char, set_char, set_char,
82 set_char, set_char, set_char, set_char,
83 set_char, set_char, set_char, set_char,
84 set_char, set_char, set_char, set_char,
85 set_char, set_char, set_char, set_char,
86 set_char, set_char, set_char, set_char, /* 0 - 127 */
87 set_char, set_char, set_char, set_char, /* 128 - 131 */
89 set_char, set_char, set_char, set_char, /* 133 - 136 */
92 unexpected, /* 139 (BOP) */
93 unexpected, /* 140 (EOP) */
96 move_right, move_right, move_right, move_right, /* 143 - 146 */
97 move_w, move_w, move_w, move_w, move_w, /* 147 - 151 */
98 move_x, move_x, move_x, move_x, move_x, /* 152 - 156 */
99 move_down, move_down, move_down, move_down, /* 157 - 160 */
100 move_y, move_y, move_y, move_y, move_y, /* 161 - 165 */
101 move_z, move_z, move_z, move_z, move_z, /* 166 - 170 */
102 sel_font, sel_font, sel_font, sel_font,
103 sel_font, sel_font, sel_font, sel_font,
104 sel_font, sel_font, sel_font, sel_font,
105 sel_font, sel_font, sel_font, sel_font,
106 sel_font, sel_font, sel_font, sel_font,
107 sel_font, sel_font, sel_font, sel_font,
108 sel_font, sel_font, sel_font, sel_font,
109 sel_font, sel_font, sel_font, sel_font,
110 sel_font, sel_font, sel_font, sel_font,
111 sel_font, sel_font, sel_font, sel_font,
112 sel_font, sel_font, sel_font, sel_font,
113 sel_font, sel_font, sel_font, sel_font,
114 sel_font, sel_font, sel_font, sel_font,
115 sel_font, sel_font, sel_font, sel_font,
116 sel_font, sel_font, sel_font, sel_font,
117 sel_font, sel_font, sel_font, sel_font, /* 171 - 234 */
118 sel_fontn, sel_fontn, sel_fontn, sel_fontn, /* 235 - 238 */
119 special, special, special, special, /* 239 - 242 */
120 def_font, def_font, def_font, def_font, /* 243 - 246 */
121 unexpected, /* 247 (PRE) */
122 unexpected, /* 248 (POST) */
123 unexpected, /* 249 (POST_POST) */
124 undefined, undefined, undefined,
125 undefined, undefined, undefined /* 250 - 255 */
128 #define DVI_BUFLEN 4096
130 static int mdvi_run_macro(DviContext *dvi, Uchar *macro, size_t len);
132 static void dummy_draw_glyph(DviContext *dvi, DviFontChar *ch, int x, int y)
136 static void dummy_draw_rule(DviContext *dvi, int x, int y, Uint w, Uint h, int f)
140 static int dummy_alloc_colors(void *a, Ulong *b, int c, Ulong d, Ulong e, double f, int g)
145 static void *dummy_create_image(void *a, Uint b, Uint c, Uint d)
150 static void dummy_free_image(void *a)
154 static void dummy_dev_destroy(void *a)
158 static void dummy_dev_putpixel(void *a, int x, int y, Ulong c)
162 static void dummy_dev_refresh(DviContext *a, void *b)
166 static void dummy_dev_set_color(void *a, Ulong b, Ulong c)
170 /* functions to report errors */
171 static void dvierr(DviContext *dvi, const char *format, ...)
175 va_start(ap, format);
176 fprintf(stderr, "%s[%d]: Error: ",
177 dvi->filename, dvi->currpage);
178 vfprintf(stderr, format, ap);
182 static void dviwarn(DviContext *dvi, const char *format, ...)
186 fprintf(stderr, "%s[%d]: Warning: ",
187 dvi->filename, dvi->currpage);
188 va_start(ap, format);
189 vfprintf(stderr, format, ap);
193 #define NEEDBYTES(d,n) \
194 ((d)->buffer.pos + (n) > (d)->buffer.length)
196 static int get_bytes(DviContext *dvi, size_t n)
199 * caller wants to read `n' bytes from dvi->buffer + dvi->pos.
200 * Make sure there is enough data to satisfy the request
202 if(NEEDBYTES(dvi, n)) {
206 if(dvi->buffer.frozen || dvi->in == NULL || feof(dvi->in)) {
208 dviwarn(dvi, _("unexpected EOF\n"));
212 if(dvi->buffer.data == NULL) {
213 /* first allocation */
214 dvi->buffer.size = Max(DVI_BUFLEN, n);
215 dvi->buffer.data = (Uchar *)mdvi_malloc(dvi->buffer.size);
216 dvi->buffer.length = 0;
217 dvi->buffer.frozen = 0;
218 } else if(dvi->buffer.pos < dvi->buffer.length) {
219 /* move whatever we want to keep */
220 dvi->buffer.length -= dvi->buffer.pos;
221 memmove(dvi->buffer.data,
222 dvi->buffer.data + dvi->buffer.pos,
225 /* we can discard all the data in this buffer */
226 dvi->buffer.length = 0;
229 required = n - dvi->buffer.length;
230 if(required > dvi->buffer.size - dvi->buffer.length) {
231 /* need to allocate more memory */
232 dvi->buffer.size = dvi->buffer.length + required + 128;
233 dvi->buffer.data = (Uchar *)xresize(dvi->buffer.data,
234 char, dvi->buffer.size);
236 /* now read into the buffer */
237 newlen = fread(dvi->buffer.data + dvi->buffer.length,
238 1, dvi->buffer.size - dvi->buffer.length, dvi->in);
240 error("%s: %s\n", dvi->filename, strerror(errno));
243 dvi->buffer.length += newlen;
249 /* only relative forward seeks are supported by this function */
250 static int dskip(DviContext *dvi, long offset)
254 if(NEEDBYTES(dvi, offset) && get_bytes(dvi, offset) == -1)
256 dvi->buffer.pos += offset;
260 /* DVI I/O functions (note: here `n' must be <= 4) */
261 static long dsgetn(DviContext *dvi, size_t n)
265 if(NEEDBYTES(dvi, n) && get_bytes(dvi, n) == -1)
267 val = msgetn(dvi->buffer.data + dvi->buffer.pos, n);
268 dvi->buffer.pos += n;
272 static int dread(DviContext *dvi, char *buffer, size_t len)
274 if(NEEDBYTES(dvi, len) && get_bytes(dvi, len) == -1)
276 memcpy(buffer, dvi->buffer.data + dvi->buffer.pos, len);
277 dvi->buffer.pos += len;
281 static long dugetn(DviContext *dvi, size_t n)
285 if(NEEDBYTES(dvi, n) && get_bytes(dvi, n) == -1)
287 val = mugetn(dvi->buffer.data + dvi->buffer.pos, n);
288 dvi->buffer.pos += n;
292 static long dtell(DviContext *dvi)
296 ftell(dvi->in) - dvi->buffer.length + dvi->buffer.pos;
299 static void dreset(DviContext *dvi)
301 if(!dvi->buffer.frozen && dvi->buffer.data)
302 mdvi_free(dvi->buffer.data);
303 dvi->buffer.data = NULL;
304 dvi->buffer.size = 0;
305 dvi->buffer.length = 0;
309 #define dsget1(d) dsgetn((d), 1)
310 #define dsget2(d) dsgetn((d), 2)
311 #define dsget3(d) dsgetn((d), 3)
312 #define dsget4(d) dsgetn((d), 4)
313 #define duget1(d) dugetn((d), 1)
314 #define duget2(d) dugetn((d), 2)
315 #define duget3(d) dugetn((d), 3)
316 #define duget4(d) dugetn((d), 4)
319 static void dviprint(DviContext *dvi, const char *command, int sub, const char *fmt, ...)
324 printf("%s: ", dvi->filename);
325 for(i = 0; i < dvi->depth; i++)
327 printf("%4lu: %s", dtell(dvi), command);
328 if(sub >= 0) printf("%d", sub);
329 if(*fmt) printf(": ");
335 if(_mdvi_debug_mask & DBG_OPCODE) do { dviprint x; } while(0)
337 #define SHOWCMD(x) do { } while(0)
340 int mdvi_find_tex_page(DviContext *dvi, int tex_page)
344 for(i = 0; i < dvi->npages; i++)
345 if(dvi->pagemap[i][1] == tex_page)
350 /* page sorting functions */
351 static int sort_up(const void *p1, const void *p2)
353 return ((long *)p1)[1] - ((long *)p2)[1];
355 static int sort_down(const void *p1, const void *p2)
357 return ((long *)p2)[1] - ((long *)p1)[1];
359 static int sort_random(const void *p1, const void *p2)
361 return (random() % 1) ? -1 : 1;
363 static int sort_dvi_up(const void *p1, const void *p2)
365 return ((long *)p1)[0] - ((long *)p2)[0];
367 static int sort_dvi_down(const void *p1, const void *p2)
369 return ((long *)p1)[0] - ((long *)p2)[0];
372 void mdvi_sort_pages(DviContext *dvi, DviPageSort type)
374 int (*sortfunc) __PROTO((const void *, const void *));
377 case MDVI_PAGE_SORT_UP:
380 case MDVI_PAGE_SORT_DOWN:
381 sortfunc = sort_down;
383 case MDVI_PAGE_SORT_RANDOM:
384 sortfunc = sort_random;
386 case MDVI_PAGE_SORT_DVI_UP:
387 sortfunc = sort_dvi_up;
389 case MDVI_PAGE_SORT_DVI_DOWN:
390 sortfunc = sort_dvi_down;
392 case MDVI_PAGE_SORT_NONE:
399 qsort(dvi->pagemap, dvi->npages, sizeof(PageNum), sortfunc);
402 static DviFontRef *define_font(DviContext *dvi, int op)
414 arg = dugetn(dvi, op - DVI_FNT_DEF1 + 1);
415 checksum = duget4(dvi);
418 hdpi = FROUND(dvi->params.mag * dvi->params.dpi * scale / dsize);
419 vdpi = FROUND(dvi->params.mag * dvi->params.vdpi * scale / dsize);
420 n = duget1(dvi) + duget1(dvi);
421 name = mdvi_malloc(n + 1);
424 DEBUG((DBG_FONTS, "requesting font %d = `%s' at %.1fpt (%dx%d dpi)\n",
425 arg, name, (double)scale / (dvi->params.tfm_conv * 0x100000),
427 ref = font_reference(&dvi->params, arg, name, checksum, hdpi, vdpi, scale);
429 error(_("could not load font `%s'\n"), name);
437 static char *opendvi(const char *name)
443 /* if file ends with .dvi and it exists, that's it */
444 if(len >= 4 && STREQ(name+len-4, ".dvi")) {
445 DEBUG((DBG_DVI|DBG_FILES, "opendvi: Trying `%s'\n", name));
446 if(access(name, R_OK) == 0)
447 return mdvi_strdup(name);
450 /* try appending .dvi */
451 file = mdvi_malloc(len + 5);
453 strcpy(file+len, ".dvi");
454 DEBUG((DBG_DVI|DBG_FILES, "opendvi: Trying `%s'\n", file));
455 if(access(file, R_OK) == 0)
457 /* try the given name */
459 DEBUG((DBG_DVI|DBG_FILES, "opendvi: Trying `%s'\n", file));
460 if(access(file, R_OK) == 0)
466 int mdvi_reload(DviContext *dvi, DviParams *np)
477 pars = np ? np : &dvi->params;
478 DEBUG((DBG_DVI, "%s: reloading\n", dvi->filename));
481 newdvi = mdvi_init_context(pars, dvi->pagesel, dvi->filename);
483 warning(_("could not reload `%s'\n"), dvi->filename);
487 /* drop all our font references */
488 font_drop_chain(dvi->fonts);
489 /* destroy our font map */
491 mdvi_free(dvi->fontmap);
492 dvi->currfont = NULL;
494 /* and use the ones we just loaded */
495 dvi->fonts = newdvi->fonts;
496 dvi->fontmap = newdvi->fontmap;
497 dvi->nfonts = newdvi->nfonts;
499 /* copy the new information */
500 dvi->params = newdvi->params;
501 dvi->num = newdvi->num;
502 dvi->den = newdvi->den;
503 dvi->dvimag = newdvi->dvimag;
504 dvi->dviconv = newdvi->dviconv;
505 dvi->dvivconv = newdvi->dvivconv;
506 dvi->modtime = newdvi->modtime;
508 if(dvi->fileid) mdvi_free(dvi->fileid);
509 dvi->fileid = newdvi->fileid;
511 dvi->dvi_page_w = newdvi->dvi_page_w;
512 dvi->dvi_page_h = newdvi->dvi_page_h;
514 mdvi_free(dvi->pagemap);
515 dvi->pagemap = newdvi->pagemap;
516 dvi->npages = newdvi->npages;
517 if(dvi->currpage > dvi->npages-1)
520 mdvi_free(dvi->stack);
521 dvi->stack = newdvi->stack;
522 dvi->stacksize = newdvi->stacksize;
524 /* remove fonts that are not being used anymore */
525 font_free_unused(&dvi->device);
527 mdvi_free(newdvi->filename);
530 DEBUG((DBG_DVI, "%s: reload successful\n", dvi->filename));
531 if(dvi->device.refresh)
532 dvi->device.refresh(dvi, dvi->device.device_data);
537 /* function to change parameters ia DVI context
538 * The DVI context is modified ONLY if this function is successful */
539 int mdvi_configure(DviContext *dvi, DviParamCode option, ...)
546 va_start(ap, option);
550 np = dvi->params; /* structure copy */
551 while(option != MDVI_PARAM_LAST) {
554 np.dpi = np.vdpi = va_arg(ap, Uint);
558 np.dpi = va_arg(ap, Uint);
562 np.vdpi = va_arg(ap, Uint);
564 case MDVI_SET_SHRINK:
565 np.hshrink = np.vshrink = va_arg(ap, Uint);
566 reset_font = MDVI_FONTSEL_GREY|MDVI_FONTSEL_BITMAP;
568 case MDVI_SET_XSHRINK:
569 np.hshrink = va_arg(ap, Uint);
570 reset_font = MDVI_FONTSEL_GREY|MDVI_FONTSEL_BITMAP;
572 case MDVI_SET_YSHRINK:
573 np.vshrink = va_arg(ap, Uint);
574 reset_font = MDVI_FONTSEL_GREY|MDVI_FONTSEL_BITMAP;
576 case MDVI_SET_ORIENTATION:
577 np.orientation = va_arg(ap, DviOrientation);
578 reset_font = MDVI_FONTSEL_GLYPH;
581 np.gamma = va_arg(ap, double);
582 reset_font = MDVI_FONTSEL_GREY;
584 case MDVI_SET_DENSITY:
585 np.density = va_arg(ap, Uint);
586 reset_font = MDVI_FONTSEL_BITMAP;
588 case MDVI_SET_MAGNIFICATION:
589 np.mag = va_arg(ap, double);
593 np.hdrift = np.vdrift = va_arg(ap, int);
595 case MDVI_SET_HDRIFT:
596 np.hdrift = va_arg(ap, int);
598 case MDVI_SET_VDRIFT:
599 np.vdrift = va_arg(ap, int);
601 case MDVI_SET_FOREGROUND:
602 np.fg = va_arg(ap, Ulong);
603 reset_font = MDVI_FONTSEL_GREY;
605 case MDVI_SET_BACKGROUND:
606 np.bg = va_arg(ap, Ulong);
607 reset_font = MDVI_FONTSEL_GREY;
612 option = va_arg(ap, DviParamCode);
616 /* check that all values make sense */
617 if(np.dpi <= 0 || np.vdpi <= 0)
623 if(np.hshrink < 1 || np.vshrink < 1)
625 if(np.hdrift < 0 || np.vdrift < 0)
631 * If the dpi or the magnification change, we basically have to reload
632 * the DVI file again from scratch.
636 return (mdvi_reload(dvi, &np) == 0);
638 if(np.hshrink != dvi->params.hshrink) {
639 np.conv = dvi->dviconv;
641 np.conv /= np.hshrink;
643 if(np.vshrink != dvi->params.vshrink) {
644 np.vconv = dvi->dvivconv;
646 np.vconv /= np.vshrink;
650 font_reset_chain_glyphs(&dvi->device, dvi->fonts, reset_font);
653 if((reset_font & MDVI_FONTSEL_GLYPH) && dvi->device.refresh) {
654 dvi->device.refresh(dvi, dvi->device.device_data);
661 * Read the initial data from the DVI file. If something is wrong with the
662 * file, we just spit out an error message and refuse to load the file,
663 * without giving any details. This makes sense because DVI files are ok
664 * 99.99% of the time, and dvitype(1) can be used to check the other 0.01%.
666 DviContext *mdvi_init_context(DviParams *par, DviPageSpec *spec, const char *file)
678 * 1. Open the file and initialize the DVI context
681 filename = opendvi(file);
682 if(filename == NULL) {
686 p = fopen(filename, "r");
692 dvi = xalloc(DviContext);
693 memzero(dvi, sizeof(DviContext));
695 dvi->filename = filename;
697 dvi->modtime = get_mtime(fileno(p));
698 dvi->buffer.data = NULL;
700 dvi->in = p; /* now we can use the dget*() functions */
703 * 2. Read the preamble, extract scaling information, and
704 * setup the DVI parameters.
707 if(fuget1(p) != DVI_PRE)
709 if((arg = fuget1(p)) != DVI_ID) {
710 error(_("%s: unsupported DVI format (version %u)\n"),
712 goto error; /* jump to the end of this routine,
713 * where we handle errors */
716 dvi->num = fuget4(p);
717 dvi->den = fuget4(p);
718 dvi->dvimag = fuget4(p);
720 /* check that these numbers make sense */
721 if(!dvi->num || !dvi->den || !dvi->dvimag)
725 (par->mag > 0 ? par->mag : (double)dvi->dvimag / 1000.0);
726 dvi->params.hdrift = par->hdrift;
727 dvi->params.vdrift = par->vdrift;
728 dvi->params.dpi = par->dpi ? par->dpi : MDVI_DPI;
729 dvi->params.vdpi = par->vdpi ? par->vdpi : par->dpi;
730 dvi->params.hshrink = par->hshrink;
731 dvi->params.vshrink = par->vshrink;
732 dvi->params.density = par->density;
733 dvi->params.gamma = par->gamma;
734 dvi->params.conv = (double)dvi->num / dvi->den;
735 dvi->params.conv *= (dvi->params.dpi / 254000.0) * dvi->params.mag;
736 dvi->params.vconv = (double)dvi->num / dvi->den;
737 dvi->params.vconv *= (dvi->params.vdpi / 254000.0) * dvi->params.mag;
738 dvi->params.tfm_conv = (25400000.0 / dvi->num) *
739 ((double)dvi->den / 473628672) / 16.0;
740 dvi->params.flags = par->flags;
741 dvi->params.orientation = par->orientation;
742 dvi->params.fg = par->fg;
743 dvi->params.bg = par->bg;
745 /* initialize colors */
746 dvi->curr_fg = par->fg;
747 dvi->curr_bg = par->bg;
748 dvi->color_stack = NULL;
752 /* pixel conversion factors */
753 dvi->dviconv = dvi->params.conv;
754 dvi->dvivconv = dvi->params.vconv;
755 if(dvi->params.hshrink)
756 dvi->params.conv /= dvi->params.hshrink;
757 if(dvi->params.vshrink)
758 dvi->params.vconv /= dvi->params.vshrink;
760 /* get the comment from the preamble */
762 dvi->fileid = mdvi_malloc(n + 1);
763 fread(dvi->fileid, 1, n, p);
765 DEBUG((DBG_DVI, "%s: %s\n", filename, dvi->fileid));
768 * 3. Read postamble, extract page information (number of
769 * pages, dimensions) and stack depth.
772 /* jump to the end of the file */
773 if(fseek(p, (long)-1, SEEK_END) == -1)
775 for(n = 0; (op = fuget1(p)) == DVI_TRAILER; n++)
776 if(fseek(p, (long)-2, SEEK_CUR) < 0)
778 if(op != arg || n < 4)
780 /* get the pointer to postamble */
781 fseek(p, (long)-5, SEEK_CUR);
784 fseek(p, (long)arg, SEEK_SET);
785 if(fuget1(p) != DVI_POST)
788 if(dvi->num != fuget4(p) || dvi->den != fuget4(p) ||
789 dvi->dvimag != fuget4(p))
791 dvi->dvi_page_h = fuget4(p);
792 dvi->dvi_page_w = fuget4(p);
793 dvi->stacksize = fuget2(p);
794 dvi->npages = fuget2(p);
795 DEBUG((DBG_DVI, "%s: from postamble: stack depth %d, %d page%s\n",
796 filename, dvi->stacksize, dvi->npages, dvi->npages > 1 ? "s" : ""));
799 * 4. Process font definitions.
802 /* process font definitions */
806 * CAREFUL: here we need to use the dvi->buffer, but it might leave the
807 * the file cursor in the wrong position after reading fonts (because of
808 * buffering). It's ok, though, because after the font definitions we read
809 * the page offsets, and we fseek() to the relevant part of the file with
810 * SEEK_SET. Nothing is read after the page offsets.
812 while((op = duget1(dvi)) != DVI_POST_POST) {
817 else if(op < DVI_FNT_DEF1 || op > DVI_FNT_DEF4)
819 ref = define_font(dvi, op);
822 ref->next = dvi->fonts;
826 /* we don't need the buffer anymore */
829 if(op != DVI_POST_POST)
831 font_finish_definitions(dvi);
832 DEBUG((DBG_DVI, "%s: %d font%s required by this job\n",
833 filename, dvi->nfonts, dvi->nfonts > 1 ? "s" : ""));
834 dvi->findref = font_find_mapped;
837 * 5. Build the page map.
840 dvi->pagemap = xnalloc(PageNum, dvi->npages);
841 memzero(dvi->pagemap, sizeof(PageNum) * dvi->npages);
845 while(offset != -1) {
849 fseek(p, offset, SEEK_SET);
851 if(op != DVI_BOP || n < 0)
853 for(i = 1; i <= 10; i++)
857 /* check if the page is selected */
858 if(spec && mdvi_page_selected(spec, page, n) == 0) {
859 DEBUG((DBG_DVI, "Page %d (%ld.%ld.%ld.%ld.%ld.%ld.%ld.%ld.%ld.%ld) ignored by request\n",
860 n, page[1], page[2], page[3], page[4], page[5],
861 page[6], page[7], page[8], page[9], page[10]));
863 memcpy(&dvi->pagemap[pagecount], page, sizeof(PageNum));
869 if(pagecount >= dvi->npages) {
870 error(_("no pages selected\n"));
874 DEBUG((DBG_DVI, "%d of %d pages selected\n",
875 dvi->npages - pagecount, dvi->npages));
876 dvi->npages -= pagecount;
877 memmove(dvi->pagemap, &dvi->pagemap[pagecount],
878 dvi->npages * sizeof(PageNum));
882 * 6. Setup stack, initialize device functions
886 dvi->stack = xnalloc(DviState, dvi->stacksize + 8);
888 dvi->device.draw_glyph = dummy_draw_glyph;
889 dvi->device.draw_rule = dummy_draw_rule;
890 dvi->device.alloc_colors = dummy_alloc_colors;
891 dvi->device.create_image = dummy_create_image;
892 dvi->device.free_image = dummy_free_image;
893 dvi->device.dev_destroy = dummy_dev_destroy;
894 dvi->device.put_pixel = dummy_dev_putpixel;
895 dvi->device.refresh = dummy_dev_refresh;
896 dvi->device.set_color = dummy_dev_set_color;
897 dvi->device.device_data = NULL;
899 DEBUG((DBG_DVI, "%s read successfully\n", filename));
903 error(_("%s: File corrupted, or not a DVI file\n"), file);
905 /* if we came from the font definitions, this will be non-trivial */
907 mdvi_destroy_context(dvi);
911 void mdvi_destroy_context(DviContext *dvi)
913 if(dvi->device.dev_destroy)
914 dvi->device.dev_destroy(dvi->device.device_data);
915 /* release all fonts */
917 font_drop_chain(dvi->fonts);
918 font_free_unused(&dvi->device);
921 mdvi_free(dvi->fontmap);
923 mdvi_free(dvi->filename);
925 mdvi_free(dvi->stack);
927 mdvi_free(dvi->pagemap);
929 mdvi_free(dvi->fileid);
932 if(dvi->buffer.data && !dvi->buffer.frozen)
933 mdvi_free(dvi->buffer.data);
935 mdvi_free(dvi->color_stack);
940 void mdvi_setpage(DviContext *dvi, int pageno)
944 if(pageno > dvi->npages-1)
945 pageno = dvi->npages - 1;
946 dvi->currpage = pageno;
949 static int mdvi_run_macro(DviContext *dvi, Uchar *macro, size_t len)
951 DviFontRef *curr, *fonts;
952 DviBuffer saved_buffer;
965 curr = dvi->currfont;
967 saved_buffer = dvi->buffer;
968 saved_file = dvi->in;
969 dvi->currfont = curr->ref->subfonts;
970 dvi->fonts = curr->ref->subfonts;
971 dvi->buffer.data = macro;
973 dvi->buffer.length = len;
974 dvi->buffer.frozen = 1;
976 oldtop = dvi->stacktop;
978 /* execute commands */
979 while((opcode = duget1(dvi)) != DVI_EOP) {
980 if(dvi_commands[opcode](dvi, opcode) < 0)
983 if(opcode != DVI_EOP)
984 dviwarn(dvi, _("%s: vf macro had errors\n"),
985 curr->ref->fontname);
986 if(dvi->stacktop != oldtop)
987 dviwarn(dvi, _("%s: stack not empty after vf macro\n"),
988 curr->ref->fontname);
992 dvi->currfont = curr;
994 dvi->buffer = saved_buffer;
995 dvi->in = saved_file;
998 return (opcode != DVI_EOP ? -1 : 0);
1001 int mdvi_dopage(DviContext *dvi, int pageno)
1008 if(dvi->in == NULL) {
1009 /* try reopening the file */
1010 dvi->in = fopen(dvi->filename, "r");
1011 if(dvi->in == NULL) {
1012 warning(_("%s: could not reopen file (%s)\n"),
1017 DEBUG((DBG_FILES, "reopen(%s) -> Ok\n", dvi->filename));
1020 /* check if we need to reload the file */
1021 if(!reloaded && get_mtime(fileno(dvi->in)) > dvi->modtime) {
1022 mdvi_reload(dvi, &dvi->params);
1023 /* we have to reopen the file, again */
1028 if(pageno < 0 || pageno > dvi->npages-1) {
1029 error(_("%s: page %d out of range\n"),
1030 dvi->filename, pageno);
1034 fseek(dvi->in, (long)dvi->pagemap[pageno][0], SEEK_SET);
1035 if((op = fuget1(dvi->in)) != DVI_BOP) {
1036 error(_("%s: bad offset at page %d\n"),
1037 dvi->filename, pageno+1);
1042 fseek(dvi->in, (long)44, SEEK_CUR);
1045 dvi->currfont = NULL;
1046 memzero(&dvi->pos, sizeof(DviState));
1048 dvi->currpage = pageno;
1049 dvi->curr_layer = 0;
1051 if(dvi->buffer.data && !dvi->buffer.frozen)
1052 mdvi_free(dvi->buffer.data);
1054 /* reset our buffer */
1055 dvi->buffer.data = NULL;
1056 dvi->buffer.length = 0;
1057 dvi->buffer.pos = 0;
1058 dvi->buffer.frozen = 0;
1060 #if 0 /* make colors survive page breaks */
1061 /* reset color stack */
1062 mdvi_reset_color(dvi);
1065 /* set max horizontal and vertical drift (from dvips) */
1066 if(dvi->params.hdrift < 0) {
1067 ppi = dvi->params.dpi / dvi->params.hshrink; /* shrunk pixels per inch */
1069 dvi->params.hdrift = ppi / 100;
1071 dvi->params.hdrift = ppi / 200;
1073 dvi->params.hdrift = ppi / 400;
1075 if(dvi->params.vdrift < 0) {
1076 ppi = dvi->params.vdpi / dvi->params.vshrink; /* shrunk pixels per inch */
1078 dvi->params.vdrift = ppi / 100;
1080 dvi->params.vdrift = ppi / 200;
1082 dvi->params.vdrift = ppi / 400;
1085 dvi->params.thinsp = FROUND(0.025 * dvi->params.dpi / dvi->params.conv);
1086 dvi->params.vsmallsp = FROUND(0.025 * dvi->params.vdpi / dvi->params.vconv);
1088 /* execute all the commands in the page */
1089 while((op = duget1(dvi)) != DVI_EOP) {
1090 if(dvi_commands[op](dvi, op) < 0)
1099 dviwarn(dvi, _("stack not empty at end of page\n"));
1103 static int inline move_vertical(DviContext *dvi, int amount)
1107 dvi->pos.v += amount;
1108 rvv = vpixel_round(dvi, dvi->pos.v);
1109 if(!dvi->params.vdrift)
1111 if(amount > dvi->params.vsmallsp || amount <= -dvi->params.vsmallsp)
1116 newvv = dvi->pos.vv + vpixel_round(dvi, amount);
1117 if(rvv - newvv > dvi->params.vdrift)
1118 return rvv - dvi->params.vdrift;
1119 else if(newvv - rvv > dvi->params.vdrift)
1120 return rvv + dvi->params.vdrift;
1126 static int inline move_horizontal(DviContext *dvi, int amount)
1130 dvi->pos.h += amount;
1131 rhh = pixel_round(dvi, dvi->pos.h);
1132 if(!dvi->params.hdrift)
1134 else if(amount > dvi->params.thinsp || amount <= -6 * dvi->params.thinsp)
1139 newhh = dvi->pos.hh + pixel_round(dvi, amount);
1140 if(rhh - newhh > dvi->params.hdrift)
1141 return rhh - dvi->params.hdrift;
1142 else if(newhh - rhh > dvi->params.hdrift)
1143 return rhh + dvi->params.hdrift;
1149 static void inline fix_after_horizontal(DviContext *dvi)
1153 rhh = pixel_round(dvi, dvi->pos.h);
1154 if(!dvi->params.hdrift)
1156 else if(rhh - dvi->pos.hh > dvi->params.hdrift)
1157 dvi->pos.hh = rhh - dvi->params.hdrift;
1158 else if(dvi->pos.hh - rhh > dvi->params.hdrift)
1159 dvi->pos.hh = rhh + dvi->params.hdrift;
1164 #define DBGSUM(a,b,c) \
1165 (a), (b) > 0 ? '+' : '-', \
1166 (b) > 0 ? (b) : -(b), (c)
1169 * Draw rules with some sort of antialias support. Usefult for high-rate
1173 static void draw_shrink_rule (DviContext *dvi, int x, int y, Uint w, Uint h, int f)
1175 int hs, vs, npixels;
1179 hs = dvi->params.hshrink;
1180 vs = dvi->params.vshrink;
1181 fg = dvi->params.fg;
1182 bg = dvi->params.bg;
1184 if (MDVI_ENABLED(dvi, MDVI_PARAM_ANTIALIASED)) {
1185 npixels = vs * hs + 1;
1186 pixels = get_color_table(&dvi->device, npixels, bg, fg,
1187 dvi->params.gamma, dvi->params.density);
1192 /* Lines with width 1 should be perfectly visible
1193 * in shrink about 15. That is the reason of constant
1196 color = (pow (vs / h * hs, 2) + pow (hs / w * vs, 2)) / 225;
1197 if (color < npixels) {
1200 fg = pixels[npixels - 1];
1205 mdvi_push_color (dvi, fg, bg);
1206 dvi->device.draw_rule(dvi, x, y, w, h, f);
1207 mdvi_pop_color (dvi);
1213 * The only commands that actually draw something are:
1214 * set_char, set_rule
1217 static void draw_box(DviContext *dvi, DviFontChar *ch)
1219 DviGlyph *glyph = NULL;
1222 if(!MDVI_GLYPH_UNSET(ch->shrunk.data))
1223 glyph = &ch->shrunk;
1224 else if(!MDVI_GLYPH_UNSET(ch->grey.data))
1226 else if(!MDVI_GLYPH_UNSET(ch->glyph.data))
1234 /* this is bad -- we have to undo the orientation */
1235 switch(dvi->params.orientation) {
1236 case MDVI_ORIENT_TBLR:
1238 case MDVI_ORIENT_TBRL:
1241 case MDVI_ORIENT_BTLR:
1244 case MDVI_ORIENT_BTRL:
1248 case MDVI_ORIENT_RP90:
1253 case MDVI_ORIENT_RM90:
1258 case MDVI_ORIENT_IRP90:
1262 case MDVI_ORIENT_IRM90:
1270 draw_shrink_rule(dvi, dvi->pos.hh - x, dvi->pos.vv - y, w, h, 1);
1273 int set_char(DviContext *dvi, int opcode)
1284 num = dugetn(dvi, opcode - DVI_SET1 + 1);
1285 if(dvi->currfont == NULL) {
1286 dvierr(dvi, _("no default font set yet\n"));
1289 font = dvi->currfont->ref;
1290 ch = font_get_glyph(dvi, font, num);
1291 if(ch == NULL || ch->missing) {
1292 /* try to display something anyway */
1293 ch = FONTCHAR(font, num);
1294 if(!glyph_present(ch)) {
1296 _("requested character %d does not exist in `%s'\n"),
1297 num, font->fontname);
1301 } else if(dvi->curr_layer <= dvi->params.layer) {
1303 mdvi_run_macro(dvi, (Uchar *)font->private +
1304 ch->offset, ch->width);
1305 else if(ch->width && ch->height)
1306 dvi->device.draw_glyph(dvi, ch,
1307 dvi->pos.hh, dvi->pos.vv);
1309 if(opcode >= DVI_PUT1 && opcode <= DVI_PUT4) {
1310 SHOWCMD((dvi, "putchar", opcode - DVI_PUT1 + 1,
1312 num, dvi->currfont->ref->fontname));
1314 h = dvi->pos.h + ch->tfmwidth;
1315 hh = dvi->pos.hh + pixel_round(dvi, ch->tfmwidth);
1316 SHOWCMD((dvi, "setchar", num, "(%d,%d) h:=%d%c%d=%d, hh:=%d (%s)\n",
1317 dvi->pos.hh, dvi->pos.vv,
1318 DBGSUM(dvi->pos.h, ch->tfmwidth, h), hh,
1322 fix_after_horizontal(dvi);
1328 int set_rule(DviContext *dvi, int opcode)
1334 b = dsget4(dvi); w = rule_round(dvi, b);
1335 if(a > 0 && b > 0) {
1336 h = vrule_round(dvi, a);
1337 SHOWCMD((dvi, opcode == DVI_SET_RULE ? "setrule" : "putrule", -1,
1338 "width %d, height %d (%dx%d pixels)\n",
1340 /* the `draw' functions expect the origin to be at the top left
1341 * corner of the rule, not the bottom left, as in DVI files */
1342 if(dvi->curr_layer <= dvi->params.layer) {
1343 draw_shrink_rule(dvi,
1344 dvi->pos.hh, dvi->pos.vv - h + 1, w, h, 1);
1347 SHOWCMD((dvi, opcode == DVI_SET_RULE ? "setrule" : "putrule", -1,
1348 "(moving left only, by %d)\n", b));
1351 if(opcode == DVI_SET_RULE) {
1354 fix_after_horizontal(dvi);
1359 int no_op(DviContext *dvi, int opcode)
1361 SHOWCMD((dvi, "noop", -1, ""));
1365 int push(DviContext *dvi, int opcode)
1367 if(dvi->stacktop == dvi->stacksize) {
1369 dviwarn(dvi, _("enlarging stack\n"));
1370 dvi->stacksize += 8;
1371 dvi->stack = xresize(dvi->stack,
1372 DviState, dvi->stacksize);
1374 memcpy(&dvi->stack[dvi->stacktop], &dvi->pos, sizeof(DviState));
1375 SHOWCMD((dvi, "push", -1,
1376 "level %d: (h=%d,v=%d,w=%d,x=%d,y=%d,z=%d,hh=%d,vv=%d)\n",
1378 dvi->pos.h, dvi->pos.v, dvi->pos.w, dvi->pos.x,
1379 dvi->pos.y, dvi->pos.z, dvi->pos.hh, dvi->pos.vv));
1384 int pop(DviContext *dvi, int opcode)
1386 if(dvi->stacktop == 0) {
1387 dvierr(dvi, _("stack underflow\n"));
1390 memcpy(&dvi->pos, &dvi->stack[dvi->stacktop-1], sizeof(DviState));
1391 SHOWCMD((dvi, "pop", -1,
1392 "level %d: (h=%d,v=%d,w=%d,x=%d,y=%d,z=%d,hh=%d,vv=%d)\n",
1394 dvi->pos.h, dvi->pos.v, dvi->pos.w, dvi->pos.x,
1395 dvi->pos.y, dvi->pos.z, dvi->pos.hh, dvi->pos.vv));
1400 int move_right(DviContext *dvi, int opcode)
1405 arg = dsgetn(dvi, opcode - DVI_RIGHT1 + 1);
1407 hh = move_horizontal(dvi, arg);
1408 SHOWCMD((dvi, "right", opcode - DVI_RIGHT1 + 1,
1409 "%d h:=%d%c%d=%d, hh:=%d\n",
1410 arg, DBGSUM(h, arg, dvi->pos.h), hh));
1415 int move_down(DviContext *dvi, int opcode)
1420 arg = dsgetn(dvi, opcode - DVI_DOWN1 + 1);
1422 vv = move_vertical(dvi, arg);
1423 SHOWCMD((dvi, "down", opcode - DVI_DOWN1 + 1,
1424 "%d v:=%d%c%d=%d, vv:=%d\n",
1425 arg, DBGSUM(v, arg, dvi->pos.v), vv));
1430 int move_w(DviContext *dvi, int opcode)
1434 if(opcode != DVI_W0)
1435 dvi->pos.w = dsgetn(dvi, opcode - DVI_W0);
1437 hh = move_horizontal(dvi, dvi->pos.w);
1438 SHOWCMD((dvi, "w", opcode - DVI_W0,
1439 "%d h:=%d%c%d=%d, hh:=%d\n",
1440 dvi->pos.w, DBGSUM(h, dvi->pos.w, dvi->pos.h), hh));
1445 int move_x(DviContext *dvi, int opcode)
1449 if(opcode != DVI_X0)
1450 dvi->pos.x = dsgetn(dvi, opcode - DVI_X0);
1452 hh = move_horizontal(dvi, dvi->pos.x);
1453 SHOWCMD((dvi, "x", opcode - DVI_X0,
1454 "%d h:=%d%c%d=%d, hh:=%d\n",
1455 dvi->pos.x, DBGSUM(h, dvi->pos.x, dvi->pos.h), hh));
1460 int move_y(DviContext *dvi, int opcode)
1464 if(opcode != DVI_Y0)
1465 dvi->pos.y = dsgetn(dvi, opcode - DVI_Y0);
1467 vv = move_vertical(dvi, dvi->pos.y);
1468 SHOWCMD((dvi, "y", opcode - DVI_Y0,
1469 "%d h:=%d%c%d=%d, hh:=%d\n",
1470 dvi->pos.y, DBGSUM(v, dvi->pos.y, dvi->pos.v), vv));
1475 int move_z(DviContext *dvi, int opcode)
1479 if(opcode != DVI_Z0)
1480 dvi->pos.z = dsgetn(dvi, opcode - DVI_Z0);
1482 vv = move_vertical(dvi, dvi->pos.z);
1483 SHOWCMD((dvi, "z", opcode - DVI_Z0,
1484 "%d h:=%d%c%d=%d, hh:=%d\n",
1485 dvi->pos.z, DBGSUM(v, dvi->pos.z, dvi->pos.v), vv));
1490 int sel_font(DviContext *dvi, int opcode)
1495 ndx = opcode - DVI_FNT_NUM0;
1497 ref = font_find_flat(dvi, ndx);
1499 ref = dvi->findref(dvi, ndx);
1501 dvierr(dvi, _("font %d is not defined\n"),
1502 opcode - DVI_FNT_NUM0);
1505 SHOWCMD((dvi, "fntnum", opcode - DVI_FNT_NUM0,
1506 "current font is %s\n",
1507 ref->ref->fontname));
1508 dvi->currfont = ref;
1512 int sel_fontn(DviContext *dvi, int opcode)
1517 arg = dugetn(dvi, opcode - DVI_FNT1 + 1);
1519 ref = font_find_flat(dvi, arg);
1521 ref = dvi->findref(dvi, arg);
1523 dvierr(dvi, _("font %d is not defined\n"), arg);
1526 SHOWCMD((dvi, "fnt", opcode - DVI_FNT1 + 1,
1527 "current font is %s (id %d)\n",
1528 ref->ref->fontname, arg));
1529 dvi->currfont = ref;
1533 int special(DviContext *dvi, int opcode)
1538 arg = dugetn(dvi, opcode - DVI_XXX1 + 1);
1539 s = mdvi_malloc(arg + 1);
1542 mdvi_do_special(dvi, s);
1543 SHOWCMD((dvi, "XXXX", opcode - DVI_XXX1 + 1,
1549 int def_font(DviContext *dvi, int opcode)
1554 arg = dugetn(dvi, opcode - DVI_FNT_DEF1 + 1);
1556 ref = font_find_flat(dvi, arg);
1558 ref = dvi->findref(dvi, arg);
1561 dskip(dvi, duget1(dvi) + duget1(dvi));
1563 dvierr(dvi, _("font %d is not defined in postamble\n"), arg);
1566 SHOWCMD((dvi, "fntdef", opcode - DVI_FNT_DEF1 + 1,
1567 "%d -> %s (%d links)\n",
1568 ref->fontid, ref->ref->fontname,
1573 int unexpected(DviContext *dvi, int opcode)
1575 dvierr(dvi, _("unexpected opcode %d\n"), opcode);
1579 int undefined(DviContext *dvi, int opcode)
1581 dvierr(dvi, _("undefined opcode %d\n"), opcode);