lib/pdf/InfoOutputDev.cc

   1 #include "config.h"
   2 #include "Object.h"
   3 #include "InfoOutputDev.h"
   4 #include "SplashOutputDev.h"
   5 #ifdef HAVE_POPPLER
   6 #include <splash/SplashTypes.h>
   7 #include <splash/SplashPath.h>
   8 #include <splash/SplashFont.h>
   9 #include <splash/SplashFontFile.h>
  10 #else
  11 #include "SplashTypes.h"
  12 #include "SplashPath.h"
  13 #include "SplashFont.h"
  14 #include "SplashFontFile.h"
  15 #endif
  16 #include "GfxState.h"
  17 #include "../log.h"
  18 #include "../types.h"
  19 #include "../q.h"
  20 #include "../gfxfont.h"
  21 #include <math.h>
  22 #include <assert.h>
  23
  24 int config_addspace = 1;
  25 int config_fontquality = 10;
  26 int config_bigchar = 0;
  27
  28 InfoOutputDev::InfoOutputDev(XRef*xref)
  29 {
  30     num_links = 0;
  31     num_jpeg_images = 0;
  32     num_ppm_images = 0;
  33     num_textfields = 0;
  34     num_fonts = 0;
  35     num_polygons= 0;
  36     currentfont = 0;
  37     currentglyph = 0;
  38     id2font = new GHash(1);
  39     SplashColor white = {255,255,255};
  40     splash = new SplashOutputDev(splashModeRGB8,320,0,white,0,0);
  41     splash->startDoc(xref);
  42 }
  43 InfoOutputDev::~InfoOutputDev()
  44 {
  45     GHashIter*i;
  46     id2font->startIter(&i);
  47     GString*key;
  48     FontInfo*fontinfo;
  49     while(id2font->getNext(&i, &key, (void**)&fontinfo)) {
  50         delete fontinfo;
  51     }
  52     id2font->killIter(&i);
  53
  54     delete id2font;id2font=0;
  55     delete splash;splash=0;
  56 }
  57
  58 void FontInfo::grow(int size)
  59 {
  60     if(size >= this->num_glyphs) {
  61         this->glyphs = (GlyphInfo**)realloc(this->glyphs, sizeof(GlyphInfo*)*(size));
  62         this->kerning = (dict_t**)realloc(this->kerning, sizeof(dict_t*)*(size));
  63         memset(&this->glyphs[this->num_glyphs], 0, sizeof(SplashPath*)*((size)-this->num_glyphs));
  64         memset(&this->kerning[this->num_glyphs], 0, sizeof(dict_t*)*((size)-this->num_glyphs));
  65         this->num_glyphs = size;
  66     }
  67 }
  68 FontInfo::FontInfo(char*id)
  69 {
  70     this->id = strdup(id);
  71     this->seen = 0;
  72     this->num_glyphs = 0;
  73     this->glyphs = 0;
  74     this->kerning = 0;
  75     this->splash_font = 0;
  76     this->lastchar = -1;
  77     this->lastx = 0;
  78     this->lasty = 0;
  79     this->gfxfont = 0;
  80     this->space_char = -1;
  81 }
  82 FontInfo::~FontInfo()
  83 {
  84     if(this->id) {free(this->id);this->id=0;}
  85     this->font = 0;
  86     int t;
  87     for(t=0;t<num_glyphs;t++) {
  88         if(glyphs[t]) {
  89             delete glyphs[t]->path;glyphs[t]->path = 0;
  90             delete glyphs[t];
  91             glyphs[t]=0;
  92         }
  93     }
  94     free(glyphs);glyphs=0;
  95     if(this->gfxfont)
  96         gfxfont_free(this->gfxfont);
  97
  98     if(kerning) {
  99         for(t=0;t<num_glyphs;t++) {
 100             dict_t* d = kerning[t];
 101             if(!d) continue;
 102             DICT_ITERATE_ITEMS(d,void*,key,mtf_t*,m) {
 103                 mtf_destroy(m);
 104             }
 105             dict_destroy(d);
 106         }
 107         free(kerning);
 108         kerning=0;
 109     }
 110 }
 111
 112 static int findSpace(gfxfont_t*font)
 113 {
 114     int first_space = -1;
 115     int t;
 116     for(t=0;t<font->num_glyphs;t++) {
 117         gfxglyph_t*g = &font->glyphs[t];
 118         if(GLYPH_IS_SPACE(g)) {
 119             if(g->unicode == 32) return t;
 120             if(first_space<0)
 121                 first_space = t;
 122         }
 123     }
 124     if(font->num_glyphs>32 && GLYPH_IS_SPACE(&font->glyphs[32])) {
 125         return 32;
 126     }
 127     return first_space;
 128 }
 129
 130 static int addSpace(gfxfont_t*font)
 131 {
 132     font->num_glyphs++;
 133     font->glyphs = (gfxglyph_t*)realloc(font->glyphs, sizeof(gfxglyph_t)*font->num_glyphs);
 134     gfxglyph_t*g = &font->glyphs[font->num_glyphs-1];
 135     memset(g, 0, sizeof(*g));
 136     g->unicode = 32;
 137     //g->advance = font->ascent;
 138     g->advance = fabs(font->ascent - font->descent)*2 / 3;
 139     if(font->max_unicode > 32)
 140         font->unicode2glyph[32] = font->num_glyphs-1;
 141 #if 0
 142     g->line = gfxline_makerectangle(0, -font->ascent, g->advance, font->descent);
 143 #endif
 144     return font->num_glyphs-1;
 145 }
 146
 147 static gfxfont_t* createGfxFont(FontInfo*src)
 148 {
 149     gfxfont_t*font = (gfxfont_t*)malloc(sizeof(gfxfont_t));
 150     memset(font, 0, sizeof(gfxfont_t));
 151
 152     font->glyphs = (gfxglyph_t*)malloc(sizeof(gfxglyph_t)*src->num_glyphs);
 153     memset(font->glyphs, 0, sizeof(gfxglyph_t)*src->num_glyphs);
 154     font->id = 0;
 155     int t;
 156
 157     double quality = (INTERNAL_FONT_SIZE * 200 / config_fontquality) / src->max_size;
 158     double scale = 1;
 159     //printf("%d glyphs\n", font->num_glyphs);
 160     font->num_glyphs = 0;
 161     font->ascent = fabs(src->ascender);
 162     font->descent = fabs(src->descender);
 163
 164     for(t=0;t<src->num_glyphs;t++) {
 165         if(src->glyphs[t]) {
 166             SplashPath*path = src->glyphs[t]->path;
 167             int len = path?path->getLength():0;
 168             //printf("glyph %d) %08x (%d line segments)\n", t, path, len);
 169             gfxglyph_t*glyph = &font->glyphs[font->num_glyphs];
 170             src->glyphs[t]->glyphid = font->num_glyphs;
 171             glyph->unicode = src->glyphs[t]->unicode;
 172             if(glyph->unicode >= font->max_unicode)
 173                 font->max_unicode = glyph->unicode+1;
 174             gfxdrawer_t drawer;
 175             gfxdrawer_target_gfxline(&drawer);
 176             int s;
 177             int count = 0;
 178             double xmax = 0;
 179             for(s=0;s<len;s++) {
 180                 Guchar f;
 181                 double x, y;
 182                 path->getPoint(s, &x, &y, &f);
 183                 if(!s || x > xmax)
 184                     xmax = x;
 185                 if(f&splashPathFirst) {
 186                     drawer.moveTo(&drawer, x*scale, y*scale);
 187                 }
 188                 if(f&splashPathCurve) {
 189                     double x2,y2;
 190                     path->getPoint(++s, &x2, &y2, &f);
 191                     if(f&splashPathCurve) {
 192                         double x3,y3;
 193                         path->getPoint(++s, &x3, &y3, &f);
 194                         gfxdraw_cubicTo(&drawer, x*scale, y*scale, x2*scale, y2*scale, x3*scale, y3*scale, quality);
 195                     } else {
 196                         drawer.splineTo(&drawer, x*scale, y*scale, x2*scale, y2*scale);
 197                     }
 198                 } else {
 199                     drawer.lineTo(&drawer, x*scale, y*scale);
 200                 }
 201              //   printf("%f %f %s %s\n", x, y, (f&splashPathCurve)?"curve":"",
 202              //                           (f&splashPathFirst)?"first":"",
 203              //                           (f&splashPathLast)?"last":"");
 204             }
 205
 206             glyph->line = (gfxline_t*)drawer.result(&drawer);
 207             if(src->glyphs[t]->advance>0) {
 208                 glyph->advance = src->glyphs[t]->advance;
 209             } else {
 210                 msg("<warning> Approximating advance value for glyph %d", t);
 211                 glyph->advance = xmax*scale;
 212             }
 213             if(config_bigchar) {
 214                 double max = src->glyphs[t]->advance_max;
 215                 if(max>0 && max > glyph->advance) {
 216                     glyph->advance = max;
 217                 }
 218             }
 219
 220             font->num_glyphs++;
 221         }
 222     }
 223
 224     gfxfont_fix_unicode(font);
 225
 226     int kerning_size = 0;
 227     for(t=0;t<src->num_glyphs;t++) {
 228         dict_t* d = src->kerning[t];
 229         if(!d) continue;
 230         DICT_ITERATE_ITEMS(d,void*,key,mtf_t*,m) {
 231             if(m) {
 232                 kerning_size++;
 233             }
 234         }
 235     }
 236     font->kerning_size = kerning_size;
 237     font->kerning = (gfxkerning_t*)malloc(sizeof(gfxkerning_t)*kerning_size);
 238     int pos = 0;
 239     for(t=0;t<src->num_glyphs;t++) {
 240         dict_t* d = src->kerning[t];
 241         if(!d) continue;
 242         DICT_ITERATE_ITEMS(d,void*,key,mtf_t*,m) {
 243             if(m) {
 244                 font->kerning[pos].c1 = src->glyphs[t]->glyphid;
 245                 font->kerning[pos].c2 = src->glyphs[(int)(ptroff_t)key]->glyphid;
 246                 font->kerning[pos].advance = (int)(ptroff_t)m->first->key;
 247                 pos++;
 248             }
 249         }
 250     }
 251     //int advance = (int)(ptroff_t)m->first->key;
 252
 253     return font;
 254 }
 255
 256 static float find_average_glyph_advance(gfxfont_t*f)
 257 {
 258     if(!f->num_glyphs)
 259         return 0.0;
 260
 261     float*values = (float*)malloc(sizeof(float)*f->num_glyphs);
 262     int t;
 263     for(t=0;t<f->num_glyphs;t++) {
 264         values[t] = f->glyphs[t].advance;
 265     }
 266     float m = medianf(values, f->num_glyphs);
 267     free(values);
 268     return m;
 269 }
 270
 271 gfxfont_t* FontInfo::getGfxFont()
 272 {
 273     if(!this->gfxfont) {
 274         this->gfxfont = createGfxFont(this);
 275         this->gfxfont->id = strdup(this->id);
 276         this->space_char = findSpace(this->gfxfont);
 277         this->average_advance = find_average_glyph_advance(this->gfxfont);
 278
 279         if(this->space_char>=0) {
 280             msg("<debug> Font %s has space char %d (unicode=%d)",
 281                     this->id, this->space_char,
 282                     this->gfxfont->glyphs[this->space_char].unicode);
 283         } else if(config_addspace) {
 284             this->space_char = addSpace(this->gfxfont);
 285             msg("<debug> Appending space char to font %s, position %d", this->gfxfont->id, this->space_char);
 286         }
 287     }
 288     return this->gfxfont;
 289 }
 290
 291 GBool InfoOutputDev::upsideDown() {return gTrue;}
 292 GBool InfoOutputDev::useDrawChar() {return gTrue;}
 293 GBool InfoOutputDev::interpretType3Chars() {return gTrue;}
 294 GBool InfoOutputDev::useTilingPatternFill() {return gTrue;}
 295
 296 void InfoOutputDev::startPage(int pageNum, GfxState *state, double crop_x1, double crop_y1, double crop_x2, double crop_y2)
 297 {
 298     double x1,y1,x2,y2;
 299     state->transform(crop_x1,crop_y1,&x1,&y1);
 300     state->transform(crop_x2,crop_y2,&x2,&y2);
 301     if(x2<x1) {double x3=x1;x1=x2;x2=x3;}
 302     if(y2<y1) {double y3=y1;y1=y2;y2=y3;}
 303     this->x1 = (int)x1;
 304     this->y1 = (int)y1;
 305     this->x2 = (int)x2;
 306     this->y2 = (int)y2;
 307     msg("<verbose> Generating info structure for page %d", pageNum);
 308 }
 309 void InfoOutputDev::endPage()
 310 {
 311 }
 312 void InfoOutputDev::drawLink(Link *link, Catalog *catalog)
 313 {
 314     num_links++;
 315 }
 316
 317 /*  } else if(!strcmp(key,"fontquality")) {
 318         this->config_fontquality = atof(value);
 319         if(this->config_fontquality<=1)
 320             this->config_fontquality=1;
 321     } else if(!strcmp(key,"bigchar")) {
 322         this->config_bigchar = atoi(value);
 323     }
 324  */
 325
 326 double InfoOutputDev::getMaximumFontSize(char*id)
 327 {
 328     FontInfo*info = (FontInfo*)id2font->lookup(id);
 329     if(!info) {
 330         msg("<error> Unknown font id: %s", id);
 331         return 0.0;
 332     }
 333     return info->max_size;
 334 }
 335
 336 char*getFontID(GfxFont*font)
 337 {
 338     Ref*ref = font->getID();
 339     GString*gstr = font->getName();
 340     char* fname = gstr==0?0:gstr->getCString();
 341     char buf[128];
 342     if(fname==0) {
 343         if(font->getType() == fontType3) {
 344             sprintf(buf, "t3font-%d-%d", ref->num, ref->gen);
 345         } else {
 346             sprintf(buf, "font-%d-%d", ref->num, ref->gen);
 347         }
 348     } else {
 349         sprintf(buf, "%s-%d-%d", fname, ref->num, ref->gen);
 350     }
 351     return strdup(buf);
 352 }
 353
 354 void InfoOutputDev::updateFont(GfxState *state)
 355 {
 356     GfxFont*font = state->getFont();
 357     if(!font) {
 358         currentfont = 0;
 359         return;
 360     }
 361     if(font->getType() == fontType3) {
 362         currentfont = 0;
 363         return;
 364     }
 365     char*id = getFontID(font);
 366
 367     if(currentfont)
 368         currentfont->splash_font = 0;
 369
 370     currentfont = (FontInfo*)id2font->lookup(id);
 371     if(!currentfont) {
 372         currentfont = new FontInfo(id);
 373         currentfont->font = font;
 374         currentfont->max_size = 0;
 375         GString* idStr = new GString(id);
 376         id2font->add(idStr, (void*)currentfont);
 377         num_fonts++;
 378     }
 379
 380     state->setCTM(1.0,0,0,1.0,0,0);
 381     splash->updateCTM(state, 0,0,0,0,0,0);
 382     state->setTextMat(1.0,0,0,1.0,0,0);
 383     state->setFont(font, 1024.0);
 384     splash->doUpdateFont(state);
 385     currentfont->splash_font = splash->getCurrentFont();
 386     if(currentfont->splash_font) {
 387         currentfont->ascender = currentfont->splash_font->ascender;
 388         currentfont->descender = currentfont->splash_font->descender;
 389     } else {
 390         currentfont->ascender = currentfont->descender = 0;
 391     }
 392
 393     free(id);
 394 }
 395
 396 void InfoOutputDev::fill(GfxState *state)
 397 {
 398     num_polygons++;
 399 }
 400
 401 void InfoOutputDev::eoFill(GfxState *state)
 402 {
 403     num_polygons++;
 404 }
 405
 406 FontInfo* InfoOutputDev::getFont(char*id)
 407 {
 408     return (FontInfo*)id2font->lookup(id);
 409 }
 410
 411 void InfoOutputDev::drawChar(GfxState *state, double x, double y,
 412                       double dx, double dy,
 413                       double originX, double originY,
 414                       CharCode code, int nBytes, Unicode *u, int uLen)
 415 {
 416     double m11,m21,m12,m22;
 417     state->getFontTransMat(&m11, &m12, &m21, &m22);
 418     m11 *= state->getHorizScaling();
 419     m21 *= state->getHorizScaling();
 420     double lenx = sqrt(m11*m11 + m12*m12);
 421     double leny = sqrt(m21*m21 + m22*m22);
 422     double len = lenx>leny?lenx:leny;
 423     if(!currentfont || !currentfont->splash_font) {
 424         return; //error
 425     }
 426     if(currentfont && currentfont->max_size < len) {
 427         currentfont->max_size = len;
 428     }
 429
 430     num_textfields++;
 431
 432     currentfont->grow(code+1);
 433     GlyphInfo*g = currentfont->glyphs[code];
 434     if(!g) {
 435         g = currentfont->glyphs[code] = new GlyphInfo();
 436         g->advance_max = 0;
 437         currentfont->splash_font->last_advance = -1;
 438         g->path = currentfont->splash_font->getGlyphPath(code);
 439         g->advance = currentfont->splash_font->last_advance;
 440         g->unicode = 0;
 441     }
 442     if(uLen && ((u[0]>=32 && u[0]<g->unicode) || !g->unicode)) {
 443         g->unicode = u[0];
 444     }
 445     if(currentfont->lastchar>=0 && currentfont->lasty == y) {
 446         double xshift = (x - currentfont->lastx);
 447         if(xshift>=0 && xshift > g->advance_max) {
 448             g->advance_max = xshift;
 449         }
 450         int advance = (int)xshift;
 451         if(advance>=0 && advance<g->advance*4 && advance!=currentfont->lastadvance) {
 452             int c1 = currentfont->lastchar;
 453             int c2 = code;
 454             dict_t*d = currentfont->kerning[c1];
 455             if(!d) {
 456                 d = currentfont->kerning[c1] = dict_new2(&int_type);
 457             }
 458             mtf_t*k = (mtf_t*)dict_lookup(d, (void*)(ptroff_t)c2);
 459             if(!k) {
 460                 k = mtf_new(&int_type);
 461                 dict_put(d, (void*)(ptroff_t)c2, k);
 462             }
 463             mtf_increase(k, (void*)(ptroff_t)advance);
 464         }
 465     }
 466
 467     currentfont->lastx = x;
 468     currentfont->lasty = y;
 469     currentfont->lastchar = code;
 470     currentfont->lastadvance = (int)(g->advance+0.5);
 471 }
 472
 473 GBool InfoOutputDev::beginType3Char(GfxState *state, double x, double y, double dx, double dy, CharCode code, Unicode *u, int uLen)
 474 {
 475     GfxFont*font = state->getFont();
 476     if(!font)
 477         return gTrue;
 478     if(font->getType() != fontType3)
 479         return gTrue;
 480
 481     char*id = getFontID(font);
 482     currentfont = (FontInfo*)id2font->lookup(id);
 483     if(!currentfont) {
 484         currentfont = new FontInfo(id);
 485         currentfont->font = font;
 486         GString* idStr = new GString(id);
 487         id2font->add(idStr, (void*)currentfont);
 488         num_fonts++;
 489     }
 490     currentfont = currentfont;
 491     free(id);
 492
 493     currentfont->grow(code+1);
 494     if(!currentfont->glyphs[code]) {
 495         currentglyph = currentfont->glyphs[code] = new GlyphInfo();
 496         currentglyph->unicode = uLen?u[0]:0;
 497         currentglyph->path = new SplashPath();
 498         currentglyph->x1=0;
 499         currentglyph->y1=0;
 500         currentglyph->x2=dx;
 501         currentglyph->y2=dy;
 502         return gFalse;
 503     } else {
 504         return gTrue;
 505     }
 506 }
 507
 508 void InfoOutputDev::type3D0(GfxState *state, double wx, double wy)
 509 {
 510     currentglyph->x1=0;
 511     currentglyph->y1=0;
 512     currentglyph->x2=wx;
 513     currentglyph->y2=wy;
 514 }
 515
 516 void InfoOutputDev::type3D1(GfxState *state, double wx, double wy, double llx, double lly, double urx, double ury)
 517 {
 518     currentglyph->x1=llx;
 519     currentglyph->y1=lly;
 520     currentglyph->x2=urx;
 521     currentglyph->y2=ury;
 522 }
 523
 524 void InfoOutputDev::endType3Char(GfxState *state)
 525 {
 526     double x1 = currentglyph->x1;
 527     double y1 = currentglyph->y1;
 528     double x2 = currentglyph->x2;
 529     double y2 = currentglyph->y2;
 530     currentglyph->path->moveTo(x1,y1);
 531     currentglyph->path->lineTo(x2,y1);
 532     currentglyph->path->lineTo(x2,y2);
 533     currentglyph->path->lineTo(x1,y2);
 534     currentglyph->path->close();
 535 }
 536
 537 void InfoOutputDev::drawImageMask(GfxState *state, Object *ref, Stream *str,
 538                            int width, int height, GBool invert,
 539                            GBool inlineImg)
 540 {
 541     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 542
 543     OutputDev::drawImageMask(state,ref,str,width,height,invert,inlineImg);
 544 }
 545 void InfoOutputDev::drawImage(GfxState *state, Object *ref, Stream *str,
 546                        int width, int height, GfxImageColorMap *colorMap,
 547                        int *maskColors, GBool inlineImg)
 548 {
 549     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 550
 551     OutputDev::drawImage(state,ref,str,width,height,colorMap,maskColors,inlineImg);
 552 }
 553 void InfoOutputDev::drawMaskedImage(GfxState *state, Object *ref, Stream *str,
 554                                 int width, int height,
 555                                 GfxImageColorMap *colorMap,
 556                                 Stream *maskStr,
 557                                 int maskWidth, int maskHeight,
 558                                 GBool maskInvert)
 559 {
 560     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 561
 562     OutputDev::drawMaskedImage(state,ref,str,width,height,colorMap,maskStr,maskWidth,maskHeight,maskInvert);
 563 }
 564
 565 void InfoOutputDev::drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str,
 566                                     int width, int height,
 567                                     GfxImageColorMap *colorMap,
 568                                     Stream *maskStr,
 569                                     int maskWidth, int maskHeight,
 570                                     GfxImageColorMap *maskColorMap)
 571 {
 572     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 573
 574     OutputDev::drawSoftMaskedImage(state,ref,str,width,height,colorMap,maskStr,maskWidth,maskHeight,maskColorMap);
 575 }
 576
 577 void InfoOutputDev::dumpfonts(gfxdevice_t*dev)
 578 {
 579     GHashIter*i;
 580     GString*key;
 581     FontInfo*font;
 582     id2font->startIter(&i);
 583     while(id2font->getNext(&i, &key, (void**)&font)) {
 584         dev->addfont(dev, font->getGfxFont());
 585     }
 586 }