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     this->ascender = 0;
  82     this->descender = 0;
  83 }
  84 FontInfo::~FontInfo()
  85 {
  86     if(this->id) {free(this->id);this->id=0;}
  87     this->font = 0;
  88     int t;
  89     for(t=0;t<num_glyphs;t++) {
  90         if(glyphs[t]) {
  91             delete glyphs[t]->path;glyphs[t]->path = 0;
  92             delete glyphs[t];
  93             glyphs[t]=0;
  94         }
  95     }
  96     free(glyphs);glyphs=0;
  97     if(this->gfxfont)
  98         gfxfont_free(this->gfxfont);
  99
 100     if(kerning) {
 101         for(t=0;t<num_glyphs;t++) {
 102             dict_t* d = kerning[t];
 103             if(!d) continue;
 104             DICT_ITERATE_ITEMS(d,void*,key,mtf_t*,m) {
 105                 mtf_destroy(m);
 106             }
 107             dict_destroy(d);
 108         }
 109         free(kerning);
 110         kerning=0;
 111     }
 112 }
 113
 114 static int findSpace(gfxfont_t*font)
 115 {
 116     int first_space = -1;
 117     int t;
 118     for(t=0;t<font->num_glyphs;t++) {
 119         gfxglyph_t*g = &font->glyphs[t];
 120         if(GLYPH_IS_SPACE(g)) {
 121             if(g->unicode == 32) return t;
 122         }
 123     }
 124     return -1;
 125 }
 126
 127 static int addSpace(gfxfont_t*font)
 128 {
 129     /* first, make sure the new space char is the only char that'll use unicode 32 */
 130     int t;
 131     for(t=0;t<font->num_glyphs;t++) {
 132         if(font->glyphs[t].unicode==32)
 133             font->glyphs[t].unicode=0;
 134     }
 135     font->num_glyphs++;
 136     font->glyphs = (gfxglyph_t*)realloc(font->glyphs, sizeof(gfxglyph_t)*font->num_glyphs);
 137     gfxglyph_t*g = &font->glyphs[font->num_glyphs-1];
 138     memset(g, 0, sizeof(*g));
 139     g->unicode = 32;
 140     g->advance = fabs(font->ascent + font->descent)*2 / 3;
 141     if(font->max_unicode > 32)
 142         font->unicode2glyph[32] = font->num_glyphs-1;
 143 #if 0
 144     g->line = gfxline_makerectangle(0, -font->ascent, g->advance, font->descent);
 145 #endif
 146     return font->num_glyphs-1;
 147 }
 148
 149 static gfxfont_t* createGfxFont(FontInfo*src)
 150 {
 151     gfxfont_t*font = (gfxfont_t*)malloc(sizeof(gfxfont_t));
 152     memset(font, 0, sizeof(gfxfont_t));
 153
 154     font->glyphs = (gfxglyph_t*)malloc(sizeof(gfxglyph_t)*src->num_glyphs);
 155     memset(font->glyphs, 0, sizeof(gfxglyph_t)*src->num_glyphs);
 156     font->id = 0;
 157     int t;
 158
 159     double quality = (INTERNAL_FONT_SIZE * 200 / config_fontquality) / src->max_size;
 160     double scale = 1;
 161     //printf("%d glyphs\n", font->num_glyphs);
 162     font->num_glyphs = 0;
 163     font->ascent = fabs(src->ascender);
 164     font->descent = fabs(src->descender);
 165
 166     for(t=0;t<src->num_glyphs;t++) {
 167         if(src->glyphs[t]) {
 168             SplashPath*path = src->glyphs[t]->path;
 169             int len = path?path->getLength():0;
 170             //printf("glyph %d) %08x (%d line segments)\n", t, path, len);
 171             gfxglyph_t*glyph = &font->glyphs[font->num_glyphs];
 172             src->glyphs[t]->glyphid = font->num_glyphs;
 173             glyph->unicode = src->glyphs[t]->unicode;
 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                 glyph->advance = xmax*scale;
 211             }
 212             if(config_bigchar) {
 213                 double max = src->glyphs[t]->advance_max;
 214                 if(max>0 && max > glyph->advance) {
 215                     glyph->advance = max;
 216                 }
 217             }
 218
 219             font->num_glyphs++;
 220         }
 221     }
 222
 223     int kerning_size = 0;
 224     for(t=0;t<src->num_glyphs;t++) {
 225         dict_t* d = src->kerning[t];
 226         if(!d) continue;
 227         DICT_ITERATE_ITEMS(d,void*,key,mtf_t*,m) {
 228             if(m) {
 229                 kerning_size++;
 230             }
 231         }
 232     }
 233     font->kerning_size = kerning_size;
 234     font->kerning = (gfxkerning_t*)malloc(sizeof(gfxkerning_t)*kerning_size);
 235     int pos = 0;
 236     for(t=0;t<src->num_glyphs;t++) {
 237         dict_t* d = src->kerning[t];
 238         if(!d) continue;
 239         DICT_ITERATE_ITEMS(d,void*,key,mtf_t*,m) {
 240             if(m) {
 241                 font->kerning[pos].c1 = src->glyphs[t]->glyphid;
 242                 font->kerning[pos].c2 = src->glyphs[(int)(ptroff_t)key]->glyphid;
 243                 font->kerning[pos].advance = (int)(ptroff_t)m->first->key;
 244                 pos++;
 245             }
 246         }
 247     }
 248     //int advance = (int)(ptroff_t)m->first->key;
 249
 250     return font;
 251 }
 252
 253 static float find_average_glyph_advance(gfxfont_t*f)
 254 {
 255     if(!f->num_glyphs)
 256         return 0.0;
 257
 258     float*values = (float*)malloc(sizeof(float)*f->num_glyphs);
 259     int t;
 260     for(t=0;t<f->num_glyphs;t++) {
 261         values[t] = f->glyphs[t].advance;
 262     }
 263     float m = medianf(values, f->num_glyphs);
 264     free(values);
 265     return m;
 266 }
 267
 268 gfxfont_t* FontInfo::getGfxFont()
 269 {
 270     if(!this->gfxfont) {
 271         this->gfxfont = createGfxFont(this);
 272         this->gfxfont->id = strdup(this->id);
 273         this->space_char = findSpace(this->gfxfont);
 274         this->average_advance = find_average_glyph_advance(this->gfxfont);
 275
 276         if(this->space_char>=0) {
 277             msg("<debug> Font %s has space char %d (unicode=%d)",
 278                     this->id, this->space_char,
 279                     this->gfxfont->glyphs[this->space_char].unicode);
 280         } else if(config_addspace) {
 281             this->space_char = addSpace(this->gfxfont);
 282             msg("<debug> Appending space char to font %s, position %d, width %f", this->gfxfont->id, this->space_char, this->gfxfont->glyphs[this->space_char].advance);
 283         }
 284         gfxfont_fix_unicode(this->gfxfont);
 285     }
 286     return this->gfxfont;
 287 }
 288
 289 GBool InfoOutputDev::upsideDown() {return gTrue;}
 290 GBool InfoOutputDev::useDrawChar() {return gTrue;}
 291 GBool InfoOutputDev::interpretType3Chars() {return gTrue;}
 292 GBool InfoOutputDev::useTilingPatternFill() {return gTrue;}
 293
 294 void InfoOutputDev::startPage(int pageNum, GfxState *state, double crop_x1, double crop_y1, double crop_x2, double crop_y2)
 295 {
 296     double x1,y1,x2,y2;
 297     state->transform(crop_x1,crop_y1,&x1,&y1);
 298     state->transform(crop_x2,crop_y2,&x2,&y2);
 299     if(x2<x1) {double x3=x1;x1=x2;x2=x3;}
 300     if(y2<y1) {double y3=y1;y1=y2;y2=y3;}
 301     this->x1 = (int)x1;
 302     this->y1 = (int)y1;
 303     this->x2 = (int)x2;
 304     this->y2 = (int)y2;
 305     msg("<verbose> Generating info structure for page %d", pageNum);
 306 }
 307 void InfoOutputDev::endPage()
 308 {
 309 }
 310 void InfoOutputDev::drawLink(Link *link, Catalog *catalog)
 311 {
 312     num_links++;
 313 }
 314
 315 /*  } else if(!strcmp(key,"fontquality")) {
 316         this->config_fontquality = atof(value);
 317         if(this->config_fontquality<=1)
 318             this->config_fontquality=1;
 319     } else if(!strcmp(key,"bigchar")) {
 320         this->config_bigchar = atoi(value);
 321     }
 322  */
 323
 324 double InfoOutputDev::getMaximumFontSize(char*id)
 325 {
 326     FontInfo*info = (FontInfo*)id2font->lookup(id);
 327     if(!info) {
 328         msg("<error> Unknown font id: %s", id);
 329         return 0.0;
 330     }
 331     return info->max_size;
 332 }
 333
 334 char*getFontID(GfxFont*font)
 335 {
 336     Ref*ref = font->getID();
 337     GString*gstr = font->getName();
 338     char* fname = gstr==0?0:gstr->getCString();
 339     char buf[128];
 340     if(fname==0) {
 341         if(font->getType() == fontType3) {
 342             sprintf(buf, "t3font-%d-%d", ref->num, ref->gen);
 343         } else {
 344             sprintf(buf, "font-%d-%d", ref->num, ref->gen);
 345         }
 346     } else {
 347         sprintf(buf, "%s-%d-%d", fname, ref->num, ref->gen);
 348     }
 349     return strdup(buf);
 350 }
 351
 352 void InfoOutputDev::updateFont(GfxState *state)
 353 {
 354     GfxFont*font = state->getFont();
 355     if(!font) {
 356         currentfont = 0;
 357         return;
 358     }
 359     if(font->getType() == fontType3) {
 360         currentfont = 0;
 361         return;
 362     }
 363     char*id = getFontID(font);
 364
 365     if(currentfont)
 366         currentfont->splash_font = 0;
 367
 368     currentfont = (FontInfo*)id2font->lookup(id);
 369     if(!currentfont) {
 370         currentfont = new FontInfo(id);
 371         currentfont->font = font;
 372         currentfont->max_size = 0;
 373         GString* idStr = new GString(id);
 374         id2font->add(idStr, (void*)currentfont);
 375         num_fonts++;
 376     }
 377
 378     state->setCTM(1.0,0,0,1.0,0,0);
 379     splash->updateCTM(state, 0,0,0,0,0,0);
 380     state->setTextMat(1.0,0,0,1.0,0,0);
 381     state->setFont(font, 1024.0);
 382     splash->doUpdateFont(state);
 383     currentfont->splash_font = splash->getCurrentFont();
 384     if(currentfont->splash_font) {
 385         currentfont->ascender = currentfont->splash_font->ascender;
 386         currentfont->descender = currentfont->splash_font->descender;
 387     } else {
 388         currentfont->ascender = currentfont->descender = 0;
 389     }
 390
 391     free(id);
 392 }
 393
 394 void InfoOutputDev::fill(GfxState *state)
 395 {
 396     num_polygons++;
 397 }
 398
 399 void InfoOutputDev::eoFill(GfxState *state)
 400 {
 401     num_polygons++;
 402 }
 403
 404 FontInfo* InfoOutputDev::getFont(char*id)
 405 {
 406     return (FontInfo*)id2font->lookup(id);
 407 }
 408
 409 void InfoOutputDev::drawChar(GfxState *state, double x, double y,
 410                       double dx, double dy,
 411                       double originX, double originY,
 412                       CharCode code, int nBytes, Unicode *u, int uLen)
 413 {
 414     double m11,m21,m12,m22;
 415     state->getFontTransMat(&m11, &m12, &m21, &m22);
 416     m11 *= state->getHorizScaling();
 417     m21 *= state->getHorizScaling();
 418     double lenx = sqrt(m11*m11 + m12*m12);
 419     double leny = sqrt(m21*m21 + m22*m22);
 420     double len = lenx>leny?lenx:leny;
 421     if(!currentfont || !currentfont->splash_font) {
 422         return; //error
 423     }
 424     if(currentfont && currentfont->max_size < len) {
 425         currentfont->max_size = len;
 426     }
 427
 428     num_textfields++;
 429
 430     currentfont->grow(code+1);
 431     GlyphInfo*g = currentfont->glyphs[code];
 432     if(!g) {
 433         g = currentfont->glyphs[code] = new GlyphInfo();
 434         g->advance_max = 0;
 435         currentfont->splash_font->last_advance = -1;
 436         g->path = currentfont->splash_font->getGlyphPath(code);
 437         g->advance = currentfont->splash_font->last_advance;
 438         g->unicode = 0;
 439     }
 440     if(uLen && ((u[0]>=32 && u[0]<g->unicode) || !g->unicode)) {
 441         g->unicode = u[0];
 442     }
 443     if(currentfont->lastchar>=0 && currentfont->lasty == y) {
 444         double xshift = (x - currentfont->lastx);
 445         if(xshift>=0 && xshift > g->advance_max) {
 446             g->advance_max = xshift;
 447         }
 448         int advance = (int)xshift;
 449         if(advance>=0 && advance<g->advance*4 && advance!=currentfont->lastadvance) {
 450             int c1 = currentfont->lastchar;
 451             int c2 = code;
 452             dict_t*d = currentfont->kerning[c1];
 453             if(!d) {
 454                 d = currentfont->kerning[c1] = dict_new2(&int_type);
 455             }
 456             mtf_t*k = (mtf_t*)dict_lookup(d, (void*)(ptroff_t)c2);
 457             if(!k) {
 458                 k = mtf_new(&int_type);
 459                 dict_put(d, (void*)(ptroff_t)c2, k);
 460             }
 461             mtf_increase(k, (void*)(ptroff_t)advance);
 462         }
 463     }
 464
 465     currentfont->lastx = x;
 466     currentfont->lasty = y;
 467     currentfont->lastchar = code;
 468     currentfont->lastadvance = (int)(g->advance+0.5);
 469 }
 470
 471 GBool InfoOutputDev::beginType3Char(GfxState *state, double x, double y, double dx, double dy, CharCode code, Unicode *u, int uLen)
 472 {
 473     GfxFont*font = state->getFont();
 474     if(!font)
 475         return gTrue;
 476     if(font->getType() != fontType3)
 477         return gTrue;
 478
 479     char*id = getFontID(font);
 480     currentfont = (FontInfo*)id2font->lookup(id);
 481     if(!currentfont) {
 482         currentfont = new FontInfo(id);
 483         currentfont->font = font;
 484         GString* idStr = new GString(id);
 485         id2font->add(idStr, (void*)currentfont);
 486         num_fonts++;
 487     }
 488     currentfont = currentfont;
 489     free(id);
 490
 491     currentfont->grow(code+1);
 492     if(!currentfont->glyphs[code]) {
 493         currentglyph = currentfont->glyphs[code] = new GlyphInfo();
 494         currentglyph->unicode = uLen?u[0]:0;
 495         currentglyph->path = new SplashPath();
 496         currentglyph->x1=0;
 497         currentglyph->y1=0;
 498         currentglyph->x2=dx;
 499         currentglyph->y2=dy;
 500         currentglyph->advance=dx;
 501         return gFalse;
 502     } else {
 503         return gTrue;
 504     }
 505 }
 506
 507 void InfoOutputDev::type3D0(GfxState *state, double wx, double wy)
 508 {
 509     currentglyph->x1=0;
 510     currentglyph->y1=0;
 511     currentglyph->x2=wx;
 512     currentglyph->y2=wy;
 513 }
 514
 515 void InfoOutputDev::type3D1(GfxState *state, double wx, double wy, double llx, double lly, double urx, double ury)
 516 {
 517     if(-lly>currentfont->descender)
 518         currentfont->descender = -lly;
 519     if(ury>currentfont->ascender)
 520         currentfont->ascender = ury;
 521
 522     currentglyph->x1=llx;
 523     currentglyph->y1=lly;
 524     currentglyph->x2=urx;
 525     currentglyph->y2=ury;
 526 }
 527
 528 void InfoOutputDev::endType3Char(GfxState *state)
 529 {
 530     double x1 = currentglyph->x1;
 531     double y1 = currentglyph->y1;
 532     double x2 = currentglyph->x2;
 533     double y2 = currentglyph->y2;
 534     currentglyph->path->moveTo(x1,y1);
 535     currentglyph->path->lineTo(x2,y1);
 536     currentglyph->path->lineTo(x2,y2);
 537     currentglyph->path->lineTo(x1,y2);
 538     currentglyph->path->close();
 539 }
 540
 541 void InfoOutputDev::drawImageMask(GfxState *state, Object *ref, Stream *str,
 542                            int width, int height, GBool invert,
 543                            GBool inlineImg)
 544 {
 545     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 546
 547     OutputDev::drawImageMask(state,ref,str,width,height,invert,inlineImg);
 548 }
 549 void InfoOutputDev::drawImage(GfxState *state, Object *ref, Stream *str,
 550                        int width, int height, GfxImageColorMap *colorMap,
 551                        int *maskColors, GBool inlineImg)
 552 {
 553     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 554
 555     OutputDev::drawImage(state,ref,str,width,height,colorMap,maskColors,inlineImg);
 556 }
 557 void InfoOutputDev::drawMaskedImage(GfxState *state, Object *ref, Stream *str,
 558                                 int width, int height,
 559                                 GfxImageColorMap *colorMap,
 560                                 Stream *maskStr,
 561                                 int maskWidth, int maskHeight,
 562                                 GBool maskInvert)
 563 {
 564     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 565
 566     OutputDev::drawMaskedImage(state,ref,str,width,height,colorMap,maskStr,maskWidth,maskHeight,maskInvert);
 567 }
 568
 569 void InfoOutputDev::drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str,
 570                                     int width, int height,
 571                                     GfxImageColorMap *colorMap,
 572                                     Stream *maskStr,
 573                                     int maskWidth, int maskHeight,
 574                                     GfxImageColorMap *maskColorMap)
 575 {
 576     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 577
 578     OutputDev::drawSoftMaskedImage(state,ref,str,width,height,colorMap,maskStr,maskWidth,maskHeight,maskColorMap);
 579 }
 580
 581 void InfoOutputDev::dumpfonts(gfxdevice_t*dev)
 582 {
 583     GHashIter*i;
 584     GString*key;
 585     FontInfo*font;
 586     id2font->startIter(&i);
 587     while(id2font->getNext(&i, &key, (void**)&font)) {
 588         dev->addfont(dev, font->getGfxFont());
 589     }
 590 }