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) {
 122                 /* now that we have found a space char, make sure it's unique */
 123                 int s;
 124                 for(s=0;s<font->num_glyphs;s++) {
 125                     if(s!=t && font->glyphs[s].unicode==32)
 126                         font->glyphs[s].unicode=0;
 127                 }
 128                 return t;
 129             }
 130         }
 131     }
 132     return -1;
 133 }
 134
 135 static int addSpace(gfxfont_t*font)
 136 {
 137     /* first, make sure the new space char is the only char that'll use unicode 32 */
 138     int t;
 139     for(t=0;t<font->num_glyphs;t++) {
 140         if(font->glyphs[t].unicode==32)
 141             font->glyphs[t].unicode=0;
 142     }
 143     font->num_glyphs++;
 144     font->glyphs = (gfxglyph_t*)realloc(font->glyphs, sizeof(gfxglyph_t)*font->num_glyphs);
 145     gfxglyph_t*g = &font->glyphs[font->num_glyphs-1];
 146     memset(g, 0, sizeof(*g));
 147     g->unicode = 32;
 148     g->advance = fabs(font->ascent + font->descent)*2 / 3;
 149     if(font->max_unicode > 32)
 150         font->unicode2glyph[32] = font->num_glyphs-1;
 151 #if 0
 152     g->line = gfxline_makerectangle(0, -font->ascent, g->advance, font->descent);
 153 #endif
 154     return font->num_glyphs-1;
 155 }
 156
 157 static gfxfont_t* createGfxFont(FontInfo*src)
 158 {
 159     gfxfont_t*font = (gfxfont_t*)rfx_calloc(sizeof(gfxfont_t));
 160
 161     font->glyphs = (gfxglyph_t*)malloc(sizeof(gfxglyph_t)*src->num_glyphs);
 162     memset(font->glyphs, 0, sizeof(gfxglyph_t)*src->num_glyphs);
 163     font->id = 0;
 164     int t;
 165
 166     double quality = (INTERNAL_FONT_SIZE * 200 / config_fontquality) / src->max_size;
 167     double scale = 1;
 168     //printf("%d glyphs\n", font->num_glyphs);
 169     font->num_glyphs = 0;
 170     font->ascent = fabs(src->ascender);
 171     font->descent = fabs(src->descender);
 172
 173     for(t=0;t<src->num_glyphs;t++) {
 174         if(src->glyphs[t]) {
 175             SplashPath*path = src->glyphs[t]->path;
 176             int len = path?path->getLength():0;
 177             //printf("glyph %d) %08x (%d line segments)\n", t, path, len);
 178             gfxglyph_t*glyph = &font->glyphs[font->num_glyphs];
 179             src->glyphs[t]->glyphid = font->num_glyphs;
 180             glyph->unicode = src->glyphs[t]->unicode;
 181             gfxdrawer_t drawer;
 182             gfxdrawer_target_gfxline(&drawer);
 183             int s;
 184             int count = 0;
 185             double xmax = 0;
 186             for(s=0;s<len;s++) {
 187                 Guchar f;
 188                 double x, y;
 189                 path->getPoint(s, &x, &y, &f);
 190                 if(!s || x > xmax)
 191                     xmax = x;
 192                 if(f&splashPathFirst) {
 193                     drawer.moveTo(&drawer, x*scale, y*scale);
 194                 }
 195                 if(f&splashPathCurve) {
 196                     double x2,y2;
 197                     path->getPoint(++s, &x2, &y2, &f);
 198                     if(f&splashPathCurve) {
 199                         double x3,y3;
 200                         path->getPoint(++s, &x3, &y3, &f);
 201                         gfxdraw_cubicTo(&drawer, x*scale, y*scale, x2*scale, y2*scale, x3*scale, y3*scale, quality);
 202                     } else {
 203                         drawer.splineTo(&drawer, x*scale, y*scale, x2*scale, y2*scale);
 204                     }
 205                 } else {
 206                     drawer.lineTo(&drawer, x*scale, y*scale);
 207                 }
 208              //   printf("%f %f %s %s\n", x, y, (f&splashPathCurve)?"curve":"",
 209              //                           (f&splashPathFirst)?"first":"",
 210              //                           (f&splashPathLast)?"last":"");
 211             }
 212
 213             glyph->line = (gfxline_t*)drawer.result(&drawer);
 214             if(src->glyphs[t]->advance>0) {
 215                 glyph->advance = src->glyphs[t]->advance;
 216             } else {
 217                 glyph->advance = xmax*scale;
 218             }
 219             if(config_bigchar) {
 220                 double max = src->glyphs[t]->advance_max;
 221                 if(max>0 && max > glyph->advance) {
 222                     glyph->advance = max;
 223                 }
 224             }
 225
 226             font->num_glyphs++;
 227         }
 228     }
 229
 230     int kerning_size = 0;
 231     for(t=0;t<src->num_glyphs;t++) {
 232         dict_t* d = src->kerning[t];
 233         if(!d) continue;
 234         DICT_ITERATE_ITEMS(d,void*,key,mtf_t*,m) {
 235             if(m) {
 236                 kerning_size++;
 237             }
 238         }
 239     }
 240     font->kerning_size = kerning_size;
 241     font->kerning = (gfxkerning_t*)malloc(sizeof(gfxkerning_t)*kerning_size);
 242     int pos = 0;
 243     for(t=0;t<src->num_glyphs;t++) {
 244         dict_t* d = src->kerning[t];
 245         if(!d) continue;
 246         DICT_ITERATE_ITEMS(d,void*,key,mtf_t*,m) {
 247             if(m) {
 248                 font->kerning[pos].c1 = src->glyphs[t]->glyphid;
 249                 font->kerning[pos].c2 = src->glyphs[(int)(ptroff_t)key]->glyphid;
 250                 font->kerning[pos].advance = (int)(ptroff_t)m->first->key;
 251                 pos++;
 252             }
 253         }
 254     }
 255     //int advance = (int)(ptroff_t)m->first->key;
 256
 257     return font;
 258 }
 259
 260 static float find_average_glyph_advance(gfxfont_t*f)
 261 {
 262     if(!f->num_glyphs)
 263         return 0.0;
 264
 265     float*values = (float*)malloc(sizeof(float)*f->num_glyphs);
 266     int t;
 267     for(t=0;t<f->num_glyphs;t++) {
 268         values[t] = f->glyphs[t].advance;
 269     }
 270     float m = medianf(values, f->num_glyphs);
 271     free(values);
 272     return m;
 273 }
 274
 275 gfxfont_t* FontInfo::getGfxFont()
 276 {
 277     if(!this->gfxfont) {
 278         this->gfxfont = createGfxFont(this);
 279         this->gfxfont->id = strdup(this->id);
 280         this->space_char = findSpace(this->gfxfont);
 281         this->average_advance = find_average_glyph_advance(this->gfxfont);
 282
 283         if(this->space_char>=0) {
 284             msg("<debug> Font %s has space char %d (unicode=%d)",
 285                     this->id, this->space_char,
 286                     this->gfxfont->glyphs[this->space_char].unicode);
 287         } else if(config_addspace) {
 288             this->space_char = addSpace(this->gfxfont);
 289             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);
 290         }
 291         gfxfont_fix_unicode(this->gfxfont);
 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         currentglyph->advance=dx;
 508         return gFalse;
 509     } else {
 510         return gTrue;
 511     }
 512 }
 513
 514 void InfoOutputDev::type3D0(GfxState *state, double wx, double wy)
 515 {
 516     currentglyph->x1=0;
 517     currentglyph->y1=0;
 518     currentglyph->x2=wx;
 519     currentglyph->y2=wy;
 520 }
 521
 522 void InfoOutputDev::type3D1(GfxState *state, double wx, double wy, double llx, double lly, double urx, double ury)
 523 {
 524     if(-lly>currentfont->descender)
 525         currentfont->descender = -lly;
 526     if(ury>currentfont->ascender)
 527         currentfont->ascender = ury;
 528
 529     currentglyph->x1=llx;
 530     currentglyph->y1=lly;
 531     currentglyph->x2=urx;
 532     currentglyph->y2=ury;
 533 }
 534
 535 void InfoOutputDev::endType3Char(GfxState *state)
 536 {
 537     double x1 = currentglyph->x1;
 538     double y1 = currentglyph->y1;
 539     double x2 = currentglyph->x2;
 540     double y2 = currentglyph->y2;
 541     currentglyph->path->moveTo(x1,y1);
 542     currentglyph->path->lineTo(x2,y1);
 543     currentglyph->path->lineTo(x2,y2);
 544     currentglyph->path->lineTo(x1,y2);
 545     currentglyph->path->close();
 546 }
 547
 548 void InfoOutputDev::drawImageMask(GfxState *state, Object *ref, Stream *str,
 549                            int width, int height, GBool invert,
 550                            GBool inlineImg)
 551 {
 552     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 553
 554     OutputDev::drawImageMask(state,ref,str,width,height,invert,inlineImg);
 555 }
 556 void InfoOutputDev::drawImage(GfxState *state, Object *ref, Stream *str,
 557                        int width, int height, GfxImageColorMap *colorMap,
 558                        int *maskColors, GBool inlineImg)
 559 {
 560     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 561
 562     OutputDev::drawImage(state,ref,str,width,height,colorMap,maskColors,inlineImg);
 563 }
 564 void InfoOutputDev::drawMaskedImage(GfxState *state, Object *ref, Stream *str,
 565                                 int width, int height,
 566                                 GfxImageColorMap *colorMap,
 567                                 Stream *maskStr,
 568                                 int maskWidth, int maskHeight,
 569                                 GBool maskInvert)
 570 {
 571     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 572
 573     OutputDev::drawMaskedImage(state,ref,str,width,height,colorMap,maskStr,maskWidth,maskHeight,maskInvert);
 574 }
 575
 576 void InfoOutputDev::drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str,
 577                                     int width, int height,
 578                                     GfxImageColorMap *colorMap,
 579                                     Stream *maskStr,
 580                                     int maskWidth, int maskHeight,
 581                                     GfxImageColorMap *maskColorMap)
 582 {
 583     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 584
 585     OutputDev::drawSoftMaskedImage(state,ref,str,width,height,colorMap,maskStr,maskWidth,maskHeight,maskColorMap);
 586 }
 587
 588 void InfoOutputDev::dumpfonts(gfxdevice_t*dev)
 589 {
 590     GHashIter*i;
 591     GString*key;
 592     FontInfo*font;
 593     id2font->startIter(&i);
 594     while(id2font->getNext(&i, &key, (void**)&font)) {
 595         dev->addfont(dev, font->getGfxFont());
 596     }
 597 }