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 <math.h>
  21 #include <assert.h>
  22
  23 int config_addspace = 1;
  24 int config_fontquality = 10;
  25 int config_bigchar = 0;
  26
  27 InfoOutputDev::InfoOutputDev(XRef*xref)
  28 {
  29     num_links = 0;
  30     num_jpeg_images = 0;
  31     num_ppm_images = 0;
  32     num_textfields = 0;
  33     num_fonts = 0;
  34     num_polygons= 0;
  35     currentfont = 0;
  36     currentglyph = 0;
  37     id2font = new GHash(1);
  38     SplashColor white = {255,255,255};
  39     splash = new SplashOutputDev(splashModeRGB8,320,0,white,0,0);
  40     splash->startDoc(xref);
  41 }
  42 InfoOutputDev::~InfoOutputDev()
  43 {
  44     GHashIter*i;
  45     id2font->startIter(&i);
  46     GString*key;
  47     FontInfo*fontinfo;
  48     while(id2font->getNext(&i, &key, (void**)&fontinfo)) {
  49         delete fontinfo;
  50     }
  51     id2font->killIter(&i);
  52
  53     delete id2font;id2font=0;
  54     delete splash;splash=0;
  55 }
  56
  57 void FontInfo::grow(int size)
  58 {
  59     if(size >= this->num_glyphs) {
  60         this->glyphs = (GlyphInfo**)realloc(this->glyphs, sizeof(GlyphInfo*)*(size));
  61         this->kerning = (dict_t**)realloc(this->kerning, sizeof(dict_t*)*(size));
  62         memset(&this->glyphs[this->num_glyphs], 0, sizeof(SplashPath*)*((size)-this->num_glyphs));
  63         memset(&this->kerning[this->num_glyphs], 0, sizeof(dict_t*)*((size)-this->num_glyphs));
  64         this->num_glyphs = size;
  65     }
  66 }
  67 FontInfo::FontInfo(char*id)
  68 {
  69     this->id = strdup(id);
  70     this->seen = 0;
  71     this->num_glyphs = 0;
  72     this->glyphs = 0;
  73     this->kerning = 0;
  74     this->splash_font = 0;
  75     this->lastchar = -1;
  76     this->lastx = 0;
  77     this->lasty = 0;
  78     this->gfxfont = 0;
  79     this->space_char = -1;
  80 }
  81 FontInfo::~FontInfo()
  82 {
  83     if(this->id) {free(this->id);this->id=0;}
  84     this->font = 0;
  85     int t;
  86     for(t=0;t<num_glyphs;t++) {
  87         if(glyphs[t]) {
  88             delete glyphs[t]->path;glyphs[t]->path = 0;
  89             delete glyphs[t];
  90             glyphs[t]=0;
  91         }
  92     }
  93     free(glyphs);glyphs=0;
  94     if(this->gfxfont)
  95         gfxfont_free(this->gfxfont);
  96
  97     if(kerning) {
  98         for(t=0;t<num_glyphs;t++) {
  99             dict_t* d = kerning[t];
 100             if(!d) continue;
 101             DICT_ITERATE_ITEMS(d,void*,key,mtf_t*,m) {
 102                 mtf_destroy(m);
 103             }
 104             dict_destroy(d);
 105         }
 106         free(kerning);
 107         kerning=0;
 108     }
 109 }
 110
 111 static int findSpace(gfxfont_t*font)
 112 {
 113     int first_space = -1;
 114     int t;
 115     for(t=0;t<font->num_glyphs;t++) {
 116         gfxglyph_t*g = &font->glyphs[t];
 117         if(GLYPH_IS_SPACE(g)) {
 118             if(g->unicode == 32) return t;
 119             if(first_space<0)
 120                 first_space = t;
 121         }
 122     }
 123     if(font->num_glyphs>32 && GLYPH_IS_SPACE(&font->glyphs[32])) {
 124         return 32;
 125     }
 126     return first_space;
 127 }
 128
 129 static int addSpace(gfxfont_t*font)
 130 {
 131     font->num_glyphs++;
 132     font->glyphs = (gfxglyph_t*)realloc(font->glyphs, sizeof(gfxglyph_t)*font->num_glyphs);
 133     gfxglyph_t*g = &font->glyphs[font->num_glyphs-1];
 134     memset(g, 0, sizeof(*g));
 135     g->unicode = 32;
 136     //g->advance = font->ascent;
 137     g->advance = fabs(font->ascent - font->descent)*2 / 3;
 138     if(font->max_unicode > 32)
 139         font->unicode2glyph[32] = font->num_glyphs-1;
 140 #if 0
 141     g->line = gfxline_makerectangle(0, -font->ascent, g->advance, font->descent);
 142 #endif
 143     return font->num_glyphs-1;
 144 }
 145
 146 static gfxfont_t* createGfxFont(FontInfo*src)
 147 {
 148     gfxfont_t*font = (gfxfont_t*)malloc(sizeof(gfxfont_t));
 149     memset(font, 0, sizeof(gfxfont_t));
 150
 151     font->glyphs = (gfxglyph_t*)malloc(sizeof(gfxglyph_t)*src->num_glyphs);
 152     memset(font->glyphs, 0, sizeof(gfxglyph_t)*src->num_glyphs);
 153     font->id = 0;
 154     int t;
 155
 156     double quality = (INTERNAL_FONT_SIZE * 200 / config_fontquality) / src->max_size;
 157     double scale = 1;
 158     //printf("%d glyphs\n", font->num_glyphs);
 159     font->num_glyphs = 0;
 160     font->ascent = fabs(src->ascender);
 161     font->descent = fabs(src->descender);
 162
 163     for(t=0;t<src->num_glyphs;t++) {
 164         if(src->glyphs[t]) {
 165             SplashPath*path = src->glyphs[t]->path;
 166             int len = path?path->getLength():0;
 167             //printf("glyph %d) %08x (%d line segments)\n", t, path, len);
 168             gfxglyph_t*glyph = &font->glyphs[font->num_glyphs];
 169             src->glyphs[t]->glyphid = font->num_glyphs;
 170             glyph->unicode = src->glyphs[t]->unicode;
 171             if(glyph->unicode >= font->max_unicode)
 172                 font->max_unicode = glyph->unicode+1;
 173             gfxdrawer_t drawer;
 174             gfxdrawer_target_gfxline(&drawer);
 175             int s;
 176             int count = 0;
 177             double xmax = 0;
 178             for(s=0;s<len;s++) {
 179                 Guchar f;
 180                 double x, y;
 181                 path->getPoint(s, &x, &y, &f);
 182                 if(!s || x > xmax)
 183                     xmax = x;
 184                 if(f&splashPathFirst) {
 185                     drawer.moveTo(&drawer, x*scale, y*scale);
 186                 }
 187                 if(f&splashPathCurve) {
 188                     double x2,y2;
 189                     path->getPoint(++s, &x2, &y2, &f);
 190                     if(f&splashPathCurve) {
 191                         double x3,y3;
 192                         path->getPoint(++s, &x3, &y3, &f);
 193                         gfxdraw_cubicTo(&drawer, x*scale, y*scale, x2*scale, y2*scale, x3*scale, y3*scale, quality);
 194                     } else {
 195                         drawer.splineTo(&drawer, x*scale, y*scale, x2*scale, y2*scale);
 196                     }
 197                 } else {
 198                     drawer.lineTo(&drawer, x*scale, y*scale);
 199                 }
 200              //   printf("%f %f %s %s\n", x, y, (f&splashPathCurve)?"curve":"",
 201              //                           (f&splashPathFirst)?"first":"",
 202              //                           (f&splashPathLast)?"last":"");
 203             }
 204
 205             glyph->line = (gfxline_t*)drawer.result(&drawer);
 206             if(src->glyphs[t]->advance>0) {
 207                 glyph->advance = src->glyphs[t]->advance;
 208             } else {
 209                 msg("<warning> Approximating advance value for glyph %d", t);
 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     font->unicode2glyph = (int*)malloc(sizeof(int)*font->max_unicode);
 223     memset(font->unicode2glyph, -1, sizeof(int)*font->max_unicode);
 224     for(t=0;t<font->num_glyphs;t++) {
 225         if(font->glyphs[t].unicode>0 && font->glyphs[t].unicode<font->max_unicode) {
 226             font->unicode2glyph[font->glyphs[t].unicode] = t;
 227         }
 228
 229     }
 230
 231     int kerning_size = 0;
 232     for(t=0;t<src->num_glyphs;t++) {
 233         dict_t* d = src->kerning[t];
 234         if(!d) continue;
 235         DICT_ITERATE_ITEMS(d,void*,key,mtf_t*,m) {
 236             if(m) {
 237                 kerning_size++;
 238             }
 239         }
 240     }
 241     font->kerning_size = kerning_size;
 242     font->kerning = (gfxkerning_t*)malloc(sizeof(gfxkerning_t)*kerning_size);
 243     int pos = 0;
 244     for(t=0;t<src->num_glyphs;t++) {
 245         dict_t* d = src->kerning[t];
 246         if(!d) continue;
 247         DICT_ITERATE_ITEMS(d,void*,key,mtf_t*,m) {
 248             if(m) {
 249                 font->kerning[pos].c1 = src->glyphs[t]->glyphid;
 250                 font->kerning[pos].c2 = src->glyphs[(int)(ptroff_t)key]->glyphid;
 251                 font->kerning[pos].advance = (int)(ptroff_t)m->first->key;
 252                 pos++;
 253             }
 254         }
 255     }
 256     //int advance = (int)(ptroff_t)m->first->key;
 257
 258     return font;
 259 }
 260
 261 static float find_average_glyph_advance(gfxfont_t*f)
 262 {
 263     if(!f->num_glyphs)
 264         return 0.0;
 265
 266     float*values = (float*)malloc(sizeof(float)*f->num_glyphs);
 267     int t;
 268     for(t=0;t<f->num_glyphs;t++) {
 269         values[t] = f->glyphs[t].advance;
 270     }
 271     float m = medianf(values, f->num_glyphs);
 272     free(values);
 273     return m;
 274 }
 275
 276 gfxfont_t* FontInfo::getGfxFont()
 277 {
 278     if(!this->gfxfont) {
 279         this->gfxfont = createGfxFont(this);
 280         this->gfxfont->id = strdup(this->id);
 281         this->space_char = findSpace(this->gfxfont);
 282         this->average_advance = find_average_glyph_advance(this->gfxfont);
 283
 284         if(this->space_char>=0) {
 285             msg("<debug> Font %s has space char %d (unicode=%d)",
 286                     this->id, this->space_char,
 287                     this->gfxfont->glyphs[this->space_char].unicode);
 288         } else if(config_addspace) {
 289             this->space_char = addSpace(this->gfxfont);
 290             msg("<debug> Appending space char to font %s, position %d", this->gfxfont->id, this->space_char);
 291         }
 292     }
 293     return this->gfxfont;
 294 }
 295
 296 GBool InfoOutputDev::upsideDown() {return gTrue;}
 297 GBool InfoOutputDev::useDrawChar() {return gTrue;}
 298 GBool InfoOutputDev::interpretType3Chars() {return gTrue;}
 299 GBool InfoOutputDev::useTilingPatternFill() {return gTrue;}
 300
 301 void InfoOutputDev::startPage(int pageNum, GfxState *state, double crop_x1, double crop_y1, double crop_x2, double crop_y2)
 302 {
 303     double x1,y1,x2,y2;
 304     state->transform(crop_x1,crop_y1,&x1,&y1);
 305     state->transform(crop_x2,crop_y2,&x2,&y2);
 306     if(x2<x1) {double x3=x1;x1=x2;x2=x3;}
 307     if(y2<y1) {double y3=y1;y1=y2;y2=y3;}
 308     this->x1 = (int)x1;
 309     this->y1 = (int)y1;
 310     this->x2 = (int)x2;
 311     this->y2 = (int)y2;
 312     msg("<verbose> Generating info structure for page %d", pageNum);
 313 }
 314 void InfoOutputDev::endPage()
 315 {
 316 }
 317 void InfoOutputDev::drawLink(Link *link, Catalog *catalog)
 318 {
 319     num_links++;
 320 }
 321
 322 /*  } else if(!strcmp(key,"fontquality")) {
 323         this->config_fontquality = atof(value);
 324         if(this->config_fontquality<=1)
 325             this->config_fontquality=1;
 326     } else if(!strcmp(key,"bigchar")) {
 327         this->config_bigchar = atoi(value);
 328     }
 329  */
 330
 331 double InfoOutputDev::getMaximumFontSize(char*id)
 332 {
 333     FontInfo*info = (FontInfo*)id2font->lookup(id);
 334     if(!info) {
 335         msg("<error> Unknown font id: %s", id);
 336         return 0.0;
 337     }
 338     return info->max_size;
 339 }
 340
 341 char*getFontID(GfxFont*font)
 342 {
 343     Ref*ref = font->getID();
 344     GString*gstr = font->getName();
 345     char* fname = gstr==0?0:gstr->getCString();
 346     char buf[128];
 347     if(fname==0) {
 348         if(font->getType() == fontType3) {
 349             sprintf(buf, "t3font-%d-%d", ref->num, ref->gen);
 350         } else {
 351             sprintf(buf, "font-%d-%d", ref->num, ref->gen);
 352         }
 353     } else {
 354         sprintf(buf, "%s-%d-%d", fname, ref->num, ref->gen);
 355     }
 356     return strdup(buf);
 357 }
 358
 359 void InfoOutputDev::updateFont(GfxState *state)
 360 {
 361     GfxFont*font = state->getFont();
 362     if(!font) {
 363         currentfont = 0;
 364         return;
 365     }
 366     if(font->getType() == fontType3) {
 367         currentfont = 0;
 368         return;
 369     }
 370     char*id = getFontID(font);
 371
 372     if(currentfont)
 373         currentfont->splash_font = 0;
 374
 375     currentfont = (FontInfo*)id2font->lookup(id);
 376     if(!currentfont) {
 377         currentfont = new FontInfo(id);
 378         currentfont->font = font;
 379         currentfont->max_size = 0;
 380         GString* idStr = new GString(id);
 381         id2font->add(idStr, (void*)currentfont);
 382         num_fonts++;
 383     }
 384
 385     state->setCTM(1.0,0,0,1.0,0,0);
 386     splash->updateCTM(state, 0,0,0,0,0,0);
 387     state->setTextMat(1.0,0,0,1.0,0,0);
 388     state->setFont(font, 1024.0);
 389     splash->doUpdateFont(state);
 390     currentfont->splash_font = splash->getCurrentFont();
 391     if(currentfont->splash_font) {
 392         currentfont->ascender = currentfont->splash_font->ascender;
 393         currentfont->descender = currentfont->splash_font->descender;
 394     } else {
 395         currentfont->ascender = currentfont->descender = 0;
 396     }
 397
 398     free(id);
 399 }
 400
 401 void InfoOutputDev::fill(GfxState *state)
 402 {
 403     num_polygons++;
 404 }
 405
 406 void InfoOutputDev::eoFill(GfxState *state)
 407 {
 408     num_polygons++;
 409 }
 410
 411 FontInfo* InfoOutputDev::getFont(char*id)
 412 {
 413     return (FontInfo*)id2font->lookup(id);
 414 }
 415
 416 void InfoOutputDev::drawChar(GfxState *state, double x, double y,
 417                       double dx, double dy,
 418                       double originX, double originY,
 419                       CharCode code, int nBytes, Unicode *u, int uLen)
 420 {
 421     double m11,m21,m12,m22;
 422     state->getFontTransMat(&m11, &m12, &m21, &m22);
 423     m11 *= state->getHorizScaling();
 424     m21 *= state->getHorizScaling();
 425     double lenx = sqrt(m11*m11 + m12*m12);
 426     double leny = sqrt(m21*m21 + m22*m22);
 427     double len = lenx>leny?lenx:leny;
 428     if(!currentfont || !currentfont->splash_font) {
 429         return; //error
 430     }
 431     if(currentfont && currentfont->max_size < len) {
 432         currentfont->max_size = len;
 433     }
 434
 435     num_textfields++;
 436
 437     currentfont->grow(code+1);
 438     GlyphInfo*g = currentfont->glyphs[code];
 439     if(!g) {
 440         g = currentfont->glyphs[code] = new GlyphInfo();
 441         g->advance_max = 0;
 442         currentfont->splash_font->last_advance = -1;
 443         g->path = currentfont->splash_font->getGlyphPath(code);
 444         g->advance = currentfont->splash_font->last_advance;
 445         g->unicode = 0;
 446     }
 447     if(uLen && ((u[0]>=32 && u[0]<g->unicode) || !g->unicode)) {
 448         g->unicode = u[0];
 449     }
 450     if(currentfont->lastchar>=0 && currentfont->lasty == y) {
 451         double xshift = (x - currentfont->lastx);
 452         if(xshift>=0 && xshift > g->advance_max) {
 453             g->advance_max = xshift;
 454         }
 455         int advance = (int)xshift;
 456         if(advance>=0 && advance<g->advance*4 && advance!=currentfont->lastadvance) {
 457             int c1 = currentfont->lastchar;
 458             int c2 = code;
 459             dict_t*d = currentfont->kerning[c1];
 460             if(!d) {
 461                 d = currentfont->kerning[c1] = dict_new2(&int_type);
 462             }
 463             mtf_t*k = (mtf_t*)dict_lookup(d, (void*)(ptroff_t)c2);
 464             if(!k) {
 465                 k = mtf_new(&int_type);
 466                 dict_put(d, (void*)(ptroff_t)c2, k);
 467             }
 468             mtf_increase(k, (void*)(ptroff_t)advance);
 469         }
 470     }
 471
 472     currentfont->lastx = x;
 473     currentfont->lasty = y;
 474     currentfont->lastchar = code;
 475     currentfont->lastadvance = (int)(g->advance+0.5);
 476 }
 477
 478 GBool InfoOutputDev::beginType3Char(GfxState *state, double x, double y, double dx, double dy, CharCode code, Unicode *u, int uLen)
 479 {
 480     GfxFont*font = state->getFont();
 481     if(!font)
 482         return gTrue;
 483     if(font->getType() != fontType3)
 484         return gTrue;
 485
 486     char*id = getFontID(font);
 487     currentfont = (FontInfo*)id2font->lookup(id);
 488     if(!currentfont) {
 489         currentfont = new FontInfo(id);
 490         currentfont->font = font;
 491         GString* idStr = new GString(id);
 492         id2font->add(idStr, (void*)currentfont);
 493         num_fonts++;
 494     }
 495     currentfont = currentfont;
 496     free(id);
 497
 498     currentfont->grow(code+1);
 499     if(!currentfont->glyphs[code]) {
 500         currentglyph = currentfont->glyphs[code] = new GlyphInfo();
 501         currentglyph->unicode = uLen?u[0]:0;
 502         currentglyph->path = new SplashPath();
 503         currentglyph->x1=0;
 504         currentglyph->y1=0;
 505         currentglyph->x2=dx;
 506         currentglyph->y2=dy;
 507         return gFalse;
 508     } else {
 509         return gTrue;
 510     }
 511 }
 512
 513 void InfoOutputDev::type3D0(GfxState *state, double wx, double wy)
 514 {
 515     currentglyph->x1=0;
 516     currentglyph->y1=0;
 517     currentglyph->x2=wx;
 518     currentglyph->y2=wy;
 519 }
 520
 521 void InfoOutputDev::type3D1(GfxState *state, double wx, double wy, double llx, double lly, double urx, double ury)
 522 {
 523     currentglyph->x1=llx;
 524     currentglyph->y1=lly;
 525     currentglyph->x2=urx;
 526     currentglyph->y2=ury;
 527 }
 528
 529 void InfoOutputDev::endType3Char(GfxState *state)
 530 {
 531     double x1 = currentglyph->x1;
 532     double y1 = currentglyph->y1;
 533     double x2 = currentglyph->x2;
 534     double y2 = currentglyph->y2;
 535     currentglyph->path->moveTo(x1,y1);
 536     currentglyph->path->lineTo(x2,y1);
 537     currentglyph->path->lineTo(x2,y2);
 538     currentglyph->path->lineTo(x1,y2);
 539     currentglyph->path->close();
 540 }
 541
 542 void InfoOutputDev::drawImageMask(GfxState *state, Object *ref, Stream *str,
 543                            int width, int height, GBool invert,
 544                            GBool inlineImg)
 545 {
 546     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 547
 548     OutputDev::drawImageMask(state,ref,str,width,height,invert,inlineImg);
 549 }
 550 void InfoOutputDev::drawImage(GfxState *state, Object *ref, Stream *str,
 551                        int width, int height, GfxImageColorMap *colorMap,
 552                        int *maskColors, GBool inlineImg)
 553 {
 554     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 555
 556     OutputDev::drawImage(state,ref,str,width,height,colorMap,maskColors,inlineImg);
 557 }
 558 void InfoOutputDev::drawMaskedImage(GfxState *state, Object *ref, Stream *str,
 559                                 int width, int height,
 560                                 GfxImageColorMap *colorMap,
 561                                 Stream *maskStr,
 562                                 int maskWidth, int maskHeight,
 563                                 GBool maskInvert)
 564 {
 565     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 566
 567     OutputDev::drawMaskedImage(state,ref,str,width,height,colorMap,maskStr,maskWidth,maskHeight,maskInvert);
 568 }
 569
 570 void InfoOutputDev::drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str,
 571                                     int width, int height,
 572                                     GfxImageColorMap *colorMap,
 573                                     Stream *maskStr,
 574                                     int maskWidth, int maskHeight,
 575                                     GfxImageColorMap *maskColorMap)
 576 {
 577     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 578
 579     OutputDev::drawSoftMaskedImage(state,ref,str,width,height,colorMap,maskStr,maskWidth,maskHeight,maskColorMap);
 580 }
 581
 582 void InfoOutputDev::dumpfonts(gfxdevice_t*dev)
 583 {
 584     GHashIter*i;
 585     GString*key;
 586     FontInfo*font;
 587     id2font->startIter(&i);
 588     while(id2font->getNext(&i, &key, (void**)&font)) {
 589         dev->addfont(dev, font->getGfxFont());
 590     }
 591 }