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->charid2glyph = 0;
  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     if(this->charid2glyph) {
  87         free(this->charid2glyph);
  88         this->charid2glyph = 0;
  89     }
  90     int t;
  91     for(t=0;t<num_glyphs;t++) {
  92         if(glyphs[t]) {
  93             delete glyphs[t]->path;glyphs[t]->path = 0;
  94             delete glyphs[t];
  95             glyphs[t]=0;
  96         }
  97     }
  98     free(glyphs);glyphs=0;
  99     if(this->gfxfont)
 100         gfxfont_free(this->gfxfont);
 101
 102     if(kerning) {
 103         for(t=0;t<num_glyphs;t++) {
 104             dict_t* d = kerning[t];
 105             if(!d) continue;
 106             DICT_ITERATE_ITEMS(d,void*,key,mtf_t*,m) {
 107                 mtf_destroy(m);
 108             }
 109             dict_destroy(d);
 110         }
 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             if(first_space<0)
 123                 first_space = t;
 124         }
 125     }
 126     if(font->num_glyphs>32 && GLYPH_IS_SPACE(&font->glyphs[32])) {
 127         return 32;
 128     }
 129     return first_space;
 130 }
 131
 132 static int addSpace(gfxfont_t*font)
 133 {
 134     font->num_glyphs++;
 135     font->glyphs = (gfxglyph_t*)realloc(font->glyphs, sizeof(gfxglyph_t)*font->num_glyphs);
 136     gfxglyph_t*g = &font->glyphs[font->num_glyphs-1];
 137     memset(g, 0, sizeof(*g));
 138     g->unicode = 32;
 139     //g->advance = font->ascent;
 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             if(glyph->unicode >= font->max_unicode)
 175                 font->max_unicode = glyph->unicode+1;
 176             gfxdrawer_t drawer;
 177             gfxdrawer_target_gfxline(&drawer);
 178             int s;
 179             int count = 0;
 180             double xmax = 0;
 181             for(s=0;s<len;s++) {
 182                 Guchar f;
 183                 double x, y;
 184                 path->getPoint(s, &x, &y, &f);
 185                 if(!s || x > xmax)
 186                     xmax = x;
 187                 if(f&splashPathFirst) {
 188                     drawer.moveTo(&drawer, x*scale, y*scale);
 189                 }
 190                 if(f&splashPathCurve) {
 191                     double x2,y2;
 192                     path->getPoint(++s, &x2, &y2, &f);
 193                     if(f&splashPathCurve) {
 194                         double x3,y3;
 195                         path->getPoint(++s, &x3, &y3, &f);
 196                         gfxdraw_cubicTo(&drawer, x*scale, y*scale, x2*scale, y2*scale, x3*scale, y3*scale, quality);
 197                     } else {
 198                         drawer.splineTo(&drawer, x*scale, y*scale, x2*scale, y2*scale);
 199                     }
 200                 } else {
 201                     drawer.lineTo(&drawer, x*scale, y*scale);
 202                 }
 203              //   printf("%f %f %s %s\n", x, y, (f&splashPathCurve)?"curve":"",
 204              //                           (f&splashPathFirst)?"first":"",
 205              //                           (f&splashPathLast)?"last":"");
 206             }
 207
 208             glyph->line = (gfxline_t*)drawer.result(&drawer);
 209             if(src->glyphs[t]->advance>0) {
 210                 glyph->advance = src->glyphs[t]->advance;
 211             } else {
 212                 msg("<warning> Approximating advance value for glyph %d", t);
 213                 glyph->advance = xmax*scale;
 214             }
 215             if(config_bigchar) {
 216                 double max = src->glyphs[t]->advance_max;
 217                 if(max>0 && max > glyph->advance) {
 218                     glyph->advance = max;
 219                 }
 220             }
 221
 222             font->num_glyphs++;
 223         }
 224     }
 225     font->unicode2glyph = (int*)malloc(sizeof(int)*font->max_unicode);
 226     memset(font->unicode2glyph, -1, sizeof(int)*font->max_unicode);
 227     for(t=0;t<font->num_glyphs;t++) {
 228         if(font->glyphs[t].unicode>0 && font->glyphs[t].unicode<font->max_unicode) {
 229             font->unicode2glyph[font->glyphs[t].unicode] = t;
 230         }
 231
 232     }
 233
 234     int kerning_size = 0;
 235     for(t=0;t<font->num_glyphs;t++) {
 236         dict_t* d = src->kerning[t];
 237         if(!d) continue;
 238         DICT_ITERATE_ITEMS(d,void*,key,mtf_t*,m) {
 239             if(m) {
 240                 kerning_size++;
 241             }
 242         }
 243     }
 244     font->kerning_size = kerning_size;
 245     font->kerning = (gfxkerning_t*)malloc(sizeof(gfxkerning_t)*kerning_size);
 246     int pos = 0;
 247     for(t=0;t<font->num_glyphs;t++) {
 248         dict_t* d = src->kerning[t];
 249         if(!d) continue;
 250         DICT_ITERATE_ITEMS(d,void*,key,mtf_t*,m) {
 251             if(m) {
 252                 font->kerning[pos].c1 = t;
 253                 font->kerning[pos].c2 = (int)(ptroff_t)key;
 254                 font->kerning[pos].advance = (int)(ptroff_t)m->first->key;
 255                 pos++;
 256             }
 257         }
 258     }
 259     //int advance = (int)(ptroff_t)m->first->key;
 260
 261     return font;
 262 }
 263
 264 static float find_average_glyph_advance(gfxfont_t*f)
 265 {
 266     if(!f->num_glyphs)
 267         return 0.0;
 268
 269     float*values = (float*)malloc(sizeof(float)*f->num_glyphs);
 270     int t;
 271     for(t=0;t<f->num_glyphs;t++) {
 272         values[t] = f->glyphs[t].advance;
 273     }
 274     float m = medianf(values, f->num_glyphs);
 275     free(values);
 276     return m;
 277 }
 278
 279 gfxfont_t* FontInfo::getGfxFont()
 280 {
 281     if(!this->gfxfont) {
 282         this->gfxfont = createGfxFont(this);
 283         this->gfxfont->id = strdup(this->id);
 284         this->space_char = findSpace(this->gfxfont);
 285         this->average_advance = find_average_glyph_advance(this->gfxfont);
 286
 287         if(this->space_char>=0) {
 288             msg("<debug> Font %s has space char %d (unicode=%d)",
 289                     this->id, this->space_char,
 290                     this->gfxfont->glyphs[this->space_char].unicode);
 291         } else if(config_addspace) {
 292             this->space_char = addSpace(this->gfxfont);
 293             msg("<debug> Appending space char to font %s, position %d", this->gfxfont->id, this->space_char);
 294         }
 295     }
 296     return this->gfxfont;
 297 }
 298
 299 GBool InfoOutputDev::upsideDown() {return gTrue;}
 300 GBool InfoOutputDev::useDrawChar() {return gTrue;}
 301 GBool InfoOutputDev::interpretType3Chars() {return gTrue;}
 302 GBool InfoOutputDev::useTilingPatternFill() {return gTrue;}
 303
 304 void InfoOutputDev::startPage(int pageNum, GfxState *state, double crop_x1, double crop_y1, double crop_x2, double crop_y2)
 305 {
 306     double x1,y1,x2,y2;
 307     state->transform(crop_x1,crop_y1,&x1,&y1);
 308     state->transform(crop_x2,crop_y2,&x2,&y2);
 309     if(x2<x1) {double x3=x1;x1=x2;x2=x3;}
 310     if(y2<y1) {double y3=y1;y1=y2;y2=y3;}
 311     this->x1 = (int)x1;
 312     this->y1 = (int)y1;
 313     this->x2 = (int)x2;
 314     this->y2 = (int)y2;
 315     msg("<verbose> Generating info structure for page %d", pageNum);
 316 }
 317 void InfoOutputDev::endPage()
 318 {
 319 }
 320 void InfoOutputDev::drawLink(Link *link, Catalog *catalog)
 321 {
 322     num_links++;
 323 }
 324
 325 /*  } else if(!strcmp(key,"fontquality")) {
 326         this->config_fontquality = atof(value);
 327         if(this->config_fontquality<=1)
 328             this->config_fontquality=1;
 329     } else if(!strcmp(key,"bigchar")) {
 330         this->config_bigchar = atoi(value);
 331     }
 332  */
 333
 334 double InfoOutputDev::getMaximumFontSize(char*id)
 335 {
 336     FontInfo*info = (FontInfo*)id2font->lookup(id);
 337     if(!info) {
 338         msg("<error> Unknown font id: %s", id);
 339         return 0.0;
 340     }
 341     return info->max_size;
 342 }
 343
 344 char*getFontID(GfxFont*font)
 345 {
 346     Ref*ref = font->getID();
 347     GString*gstr = font->getName();
 348     char* fname = gstr==0?0:gstr->getCString();
 349     char buf[128];
 350     if(fname==0) {
 351         if(font->getType() == fontType3) {
 352             sprintf(buf, "t3font-%d-%d", ref->num, ref->gen);
 353         } else {
 354             sprintf(buf, "font-%d-%d", ref->num, ref->gen);
 355         }
 356     } else {
 357         sprintf(buf, "%s-%d-%d", fname, ref->num, ref->gen);
 358     }
 359     return strdup(buf);
 360 }
 361
 362 void InfoOutputDev::updateFont(GfxState *state)
 363 {
 364     GfxFont*font = state->getFont();
 365     if(!font) {
 366         currentfont = 0;
 367         return;
 368     }
 369     if(font->getType() == fontType3) {
 370         currentfont = 0;
 371         return;
 372     }
 373     char*id = getFontID(font);
 374
 375     if(currentfont)
 376         currentfont->splash_font = 0;
 377
 378     currentfont = (FontInfo*)id2font->lookup(id);
 379     if(!currentfont) {
 380         currentfont = new FontInfo(id);
 381         currentfont->font = font;
 382         currentfont->max_size = 0;
 383         GString* idStr = new GString(id);
 384         id2font->add(idStr, (void*)currentfont);
 385         num_fonts++;
 386     }
 387
 388     state->setCTM(1.0,0,0,1.0,0,0);
 389     splash->updateCTM(state, 0,0,0,0,0,0);
 390     state->setTextMat(1.0,0,0,1.0,0,0);
 391     state->setFont(font, 1024.0);
 392     splash->doUpdateFont(state);
 393     currentfont->splash_font = splash->getCurrentFont();
 394     if(currentfont->splash_font) {
 395         currentfont->ascender = currentfont->splash_font->ascender;
 396         currentfont->descender = currentfont->splash_font->descender;
 397     } else {
 398         currentfont->ascender = currentfont->descender = 0;
 399     }
 400
 401     free(id);
 402 }
 403
 404 void InfoOutputDev::fill(GfxState *state)
 405 {
 406     num_polygons++;
 407 }
 408
 409 void InfoOutputDev::eoFill(GfxState *state)
 410 {
 411     num_polygons++;
 412 }
 413
 414 FontInfo* InfoOutputDev::getFont(char*id)
 415 {
 416     return (FontInfo*)id2font->lookup(id);
 417 }
 418
 419 void InfoOutputDev::drawChar(GfxState *state, double x, double y,
 420                       double dx, double dy,
 421                       double originX, double originY,
 422                       CharCode code, int nBytes, Unicode *u, int uLen)
 423 {
 424     double m11,m21,m12,m22;
 425     state->getFontTransMat(&m11, &m12, &m21, &m22);
 426     m11 *= state->getHorizScaling();
 427     m21 *= state->getHorizScaling();
 428     double lenx = sqrt(m11*m11 + m12*m12);
 429     double leny = sqrt(m21*m21 + m22*m22);
 430     double len = lenx>leny?lenx:leny;
 431     if(!currentfont || !currentfont->splash_font) {
 432         return; //error
 433     }
 434     if(currentfont && currentfont->max_size < len) {
 435         currentfont->max_size = len;
 436     }
 437
 438     num_textfields++;
 439
 440     currentfont->grow(code+1);
 441     GlyphInfo*g = currentfont->glyphs[code];
 442     if(!g) {
 443         g = currentfont->glyphs[code] = new GlyphInfo();
 444         g->advance_max = 0;
 445         currentfont->splash_font->last_advance = -1;
 446         g->path = currentfont->splash_font->getGlyphPath(code);
 447         g->advance = currentfont->splash_font->last_advance;
 448         g->unicode = 0;
 449     }
 450     if(uLen && ((u[0]>=32 && u[0]<g->unicode) || !g->unicode)) {
 451         g->unicode = u[0];
 452     }
 453     if(currentfont->lastchar>=0 && currentfont->lasty == y) {
 454         double xshift = (x - currentfont->lastx);
 455         if(xshift>=0 && xshift > g->advance_max) {
 456             g->advance_max = xshift;
 457         }
 458         int advance = (int)xshift;
 459         if(advance>=0 && advance<g->advance*4 && advance!=currentfont->lastadvance) {
 460             int c1 = currentfont->lastchar;
 461             int c2 = code;
 462             dict_t*d = currentfont->kerning[c1];
 463             if(!d) {
 464                 d = currentfont->kerning[c1] = dict_new2(&int_type);
 465             }
 466             mtf_t*k = (mtf_t*)dict_lookup(d, (void*)(ptroff_t)c2);
 467             if(!k) {
 468                 k = mtf_new(&int_type);
 469                 dict_put(d, (void*)(ptroff_t)c2, k);
 470             }
 471             mtf_increase(k, (void*)(ptroff_t)advance);
 472         }
 473     }
 474
 475     currentfont->lastx = x;
 476     currentfont->lasty = y;
 477     currentfont->lastchar = code;
 478     currentfont->lastadvance = (int)(g->advance+0.5);
 479 }
 480
 481 GBool InfoOutputDev::beginType3Char(GfxState *state, double x, double y, double dx, double dy, CharCode code, Unicode *u, int uLen)
 482 {
 483     GfxFont*font = state->getFont();
 484     if(!font)
 485         return gTrue;
 486     if(font->getType() != fontType3)
 487         return gTrue;
 488
 489     char*id = getFontID(font);
 490     currentfont = (FontInfo*)id2font->lookup(id);
 491     if(!currentfont) {
 492         currentfont = new FontInfo(id);
 493         currentfont->font = font;
 494         GString* idStr = new GString(id);
 495         id2font->add(idStr, (void*)currentfont);
 496         num_fonts++;
 497     }
 498     currentfont = currentfont;
 499     free(id);
 500
 501     currentfont->grow(code+1);
 502     if(!currentfont->glyphs[code]) {
 503         currentglyph = currentfont->glyphs[code] = new GlyphInfo();
 504         currentglyph->unicode = uLen?u[0]:0;
 505         currentglyph->path = new SplashPath();
 506         currentglyph->x1=0;
 507         currentglyph->y1=0;
 508         currentglyph->x2=dx;
 509         currentglyph->y2=dy;
 510         return gFalse;
 511     } else {
 512         return gTrue;
 513     }
 514 }
 515
 516 void InfoOutputDev::type3D0(GfxState *state, double wx, double wy)
 517 {
 518     currentglyph->x1=0;
 519     currentglyph->y1=0;
 520     currentglyph->x2=wx;
 521     currentglyph->y2=wy;
 522 }
 523
 524 void InfoOutputDev::type3D1(GfxState *state, double wx, double wy, double llx, double lly, double urx, double ury)
 525 {
 526     currentglyph->x1=llx;
 527     currentglyph->y1=lly;
 528     currentglyph->x2=urx;
 529     currentglyph->y2=ury;
 530 }
 531
 532 void InfoOutputDev::endType3Char(GfxState *state)
 533 {
 534     double x1 = currentglyph->x1;
 535     double y1 = currentglyph->y1;
 536     double x2 = currentglyph->x2;
 537     double y2 = currentglyph->y2;
 538     currentglyph->path->moveTo(x1,y1);
 539     currentglyph->path->lineTo(x2,y1);
 540     currentglyph->path->lineTo(x2,y2);
 541     currentglyph->path->lineTo(x1,y2);
 542     currentglyph->path->close();
 543 }
 544
 545 void InfoOutputDev::drawImageMask(GfxState *state, Object *ref, Stream *str,
 546                            int width, int height, GBool invert,
 547                            GBool inlineImg)
 548 {
 549     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 550
 551     OutputDev::drawImageMask(state,ref,str,width,height,invert,inlineImg);
 552 }
 553 void InfoOutputDev::drawImage(GfxState *state, Object *ref, Stream *str,
 554                        int width, int height, GfxImageColorMap *colorMap,
 555                        int *maskColors, GBool inlineImg)
 556 {
 557     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 558
 559     OutputDev::drawImage(state,ref,str,width,height,colorMap,maskColors,inlineImg);
 560 }
 561 void InfoOutputDev::drawMaskedImage(GfxState *state, Object *ref, Stream *str,
 562                                 int width, int height,
 563                                 GfxImageColorMap *colorMap,
 564                                 Stream *maskStr,
 565                                 int maskWidth, int maskHeight,
 566                                 GBool maskInvert)
 567 {
 568     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 569
 570     OutputDev::drawMaskedImage(state,ref,str,width,height,colorMap,maskStr,maskWidth,maskHeight,maskInvert);
 571 }
 572
 573 void InfoOutputDev::drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str,
 574                                     int width, int height,
 575                                     GfxImageColorMap *colorMap,
 576                                     Stream *maskStr,
 577                                     int maskWidth, int maskHeight,
 578                                     GfxImageColorMap *maskColorMap)
 579 {
 580     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 581
 582     OutputDev::drawSoftMaskedImage(state,ref,str,width,height,colorMap,maskStr,maskWidth,maskHeight,maskColorMap);
 583 }
 584
 585 void InfoOutputDev::dumpfonts(gfxdevice_t*dev)
 586 {
 587     GHashIter*i;
 588     GString*key;
 589     FontInfo*font;
 590     id2font->startIter(&i);
 591     while(id2font->getNext(&i, &key, (void**)&font)) {
 592         dev->addfont(dev, font->getGfxFont());
 593     }
 594 }