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*)rfx_calloc(sizeof(gfxfont_t));
 152
 153     font->glyphs = (gfxglyph_t*)malloc(sizeof(gfxglyph_t)*src->num_glyphs);
 154     memset(font->glyphs, 0, sizeof(gfxglyph_t)*src->num_glyphs);
 155     font->id = 0;
 156     int t;
 157
 158     double quality = (INTERNAL_FONT_SIZE * 200 / config_fontquality) / src->max_size;
 159     double scale = 1;
 160     //printf("%d glyphs\n", font->num_glyphs);
 161     font->num_glyphs = 0;
 162     font->ascent = fabs(src->ascender);
 163     font->descent = fabs(src->descender);
 164
 165     for(t=0;t<src->num_glyphs;t++) {
 166         if(src->glyphs[t]) {
 167             SplashPath*path = src->glyphs[t]->path;
 168             int len = path?path->getLength():0;
 169             //printf("glyph %d) %08x (%d line segments)\n", t, path, len);
 170             gfxglyph_t*glyph = &font->glyphs[font->num_glyphs];
 171             src->glyphs[t]->glyphid = font->num_glyphs;
 172             glyph->unicode = src->glyphs[t]->unicode;
 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                 glyph->advance = xmax*scale;
 210             }
 211             if(config_bigchar) {
 212                 double max = src->glyphs[t]->advance_max;
 213                 if(max>0 && max > glyph->advance) {
 214                     glyph->advance = max;
 215                 }
 216             }
 217
 218             font->num_glyphs++;
 219         }
 220     }
 221
 222     int kerning_size = 0;
 223     for(t=0;t<src->num_glyphs;t++) {
 224         dict_t* d = src->kerning[t];
 225         if(!d) continue;
 226         DICT_ITERATE_ITEMS(d,void*,key,mtf_t*,m) {
 227             if(m) {
 228                 kerning_size++;
 229             }
 230         }
 231     }
 232     font->kerning_size = kerning_size;
 233     font->kerning = (gfxkerning_t*)malloc(sizeof(gfxkerning_t)*kerning_size);
 234     int pos = 0;
 235     for(t=0;t<src->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                 font->kerning[pos].c1 = src->glyphs[t]->glyphid;
 241                 font->kerning[pos].c2 = src->glyphs[(int)(ptroff_t)key]->glyphid;
 242                 font->kerning[pos].advance = (int)(ptroff_t)m->first->key;
 243                 pos++;
 244             }
 245         }
 246     }
 247     //int advance = (int)(ptroff_t)m->first->key;
 248
 249     return font;
 250 }
 251
 252 static float find_average_glyph_advance(gfxfont_t*f)
 253 {
 254     if(!f->num_glyphs)
 255         return 0.0;
 256
 257     float*values = (float*)malloc(sizeof(float)*f->num_glyphs);
 258     int t;
 259     for(t=0;t<f->num_glyphs;t++) {
 260         values[t] = f->glyphs[t].advance;
 261     }
 262     float m = medianf(values, f->num_glyphs);
 263     free(values);
 264     return m;
 265 }
 266
 267 gfxfont_t* FontInfo::getGfxFont()
 268 {
 269     if(!this->gfxfont) {
 270         this->gfxfont = createGfxFont(this);
 271         this->gfxfont->id = strdup(this->id);
 272         this->space_char = findSpace(this->gfxfont);
 273         this->average_advance = find_average_glyph_advance(this->gfxfont);
 274
 275         if(this->space_char>=0) {
 276             msg("<debug> Font %s has space char %d (unicode=%d)",
 277                     this->id, this->space_char,
 278                     this->gfxfont->glyphs[this->space_char].unicode);
 279         } else if(config_addspace) {
 280             this->space_char = addSpace(this->gfxfont);
 281             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);
 282         }
 283         gfxfont_fix_unicode(this->gfxfont);
 284     }
 285     return this->gfxfont;
 286 }
 287
 288 GBool InfoOutputDev::upsideDown() {return gTrue;}
 289 GBool InfoOutputDev::useDrawChar() {return gTrue;}
 290 GBool InfoOutputDev::interpretType3Chars() {return gTrue;}
 291 GBool InfoOutputDev::useTilingPatternFill() {return gTrue;}
 292
 293 void InfoOutputDev::startPage(int pageNum, GfxState *state, double crop_x1, double crop_y1, double crop_x2, double crop_y2)
 294 {
 295     double x1,y1,x2,y2;
 296     state->transform(crop_x1,crop_y1,&x1,&y1);
 297     state->transform(crop_x2,crop_y2,&x2,&y2);
 298     if(x2<x1) {double x3=x1;x1=x2;x2=x3;}
 299     if(y2<y1) {double y3=y1;y1=y2;y2=y3;}
 300     this->x1 = (int)x1;
 301     this->y1 = (int)y1;
 302     this->x2 = (int)x2;
 303     this->y2 = (int)y2;
 304     msg("<verbose> Generating info structure for page %d", pageNum);
 305 }
 306 void InfoOutputDev::endPage()
 307 {
 308 }
 309 void InfoOutputDev::drawLink(Link *link, Catalog *catalog)
 310 {
 311     num_links++;
 312 }
 313
 314 /*  } else if(!strcmp(key,"fontquality")) {
 315         this->config_fontquality = atof(value);
 316         if(this->config_fontquality<=1)
 317             this->config_fontquality=1;
 318     } else if(!strcmp(key,"bigchar")) {
 319         this->config_bigchar = atoi(value);
 320     }
 321  */
 322
 323 double InfoOutputDev::getMaximumFontSize(char*id)
 324 {
 325     FontInfo*info = (FontInfo*)id2font->lookup(id);
 326     if(!info) {
 327         msg("<error> Unknown font id: %s", id);
 328         return 0.0;
 329     }
 330     return info->max_size;
 331 }
 332
 333 char*getFontID(GfxFont*font)
 334 {
 335     Ref*ref = font->getID();
 336     GString*gstr = font->getName();
 337     char* fname = gstr==0?0:gstr->getCString();
 338     char buf[128];
 339     if(fname==0) {
 340         if(font->getType() == fontType3) {
 341             sprintf(buf, "t3font-%d-%d", ref->num, ref->gen);
 342         } else {
 343             sprintf(buf, "font-%d-%d", ref->num, ref->gen);
 344         }
 345     } else {
 346         sprintf(buf, "%s-%d-%d", fname, ref->num, ref->gen);
 347     }
 348     return strdup(buf);
 349 }
 350
 351 void InfoOutputDev::updateFont(GfxState *state)
 352 {
 353     GfxFont*font = state->getFont();
 354     if(!font) {
 355         currentfont = 0;
 356         return;
 357     }
 358     if(font->getType() == fontType3) {
 359         currentfont = 0;
 360         return;
 361     }
 362     char*id = getFontID(font);
 363
 364     if(currentfont)
 365         currentfont->splash_font = 0;
 366
 367     currentfont = (FontInfo*)id2font->lookup(id);
 368     if(!currentfont) {
 369         currentfont = new FontInfo(id);
 370         currentfont->font = font;
 371         currentfont->max_size = 0;
 372         GString* idStr = new GString(id);
 373         id2font->add(idStr, (void*)currentfont);
 374         num_fonts++;
 375     }
 376
 377     state->setCTM(1.0,0,0,1.0,0,0);
 378     splash->updateCTM(state, 0,0,0,0,0,0);
 379     state->setTextMat(1.0,0,0,1.0,0,0);
 380     state->setFont(font, 1024.0);
 381     splash->doUpdateFont(state);
 382     currentfont->splash_font = splash->getCurrentFont();
 383     if(currentfont->splash_font) {
 384         currentfont->ascender = currentfont->splash_font->ascender;
 385         currentfont->descender = currentfont->splash_font->descender;
 386     } else {
 387         currentfont->ascender = currentfont->descender = 0;
 388     }
 389
 390     free(id);
 391 }
 392
 393 void InfoOutputDev::fill(GfxState *state)
 394 {
 395     num_polygons++;
 396 }
 397
 398 void InfoOutputDev::eoFill(GfxState *state)
 399 {
 400     num_polygons++;
 401 }
 402
 403 FontInfo* InfoOutputDev::getFont(char*id)
 404 {
 405     return (FontInfo*)id2font->lookup(id);
 406 }
 407
 408 void InfoOutputDev::drawChar(GfxState *state, double x, double y,
 409                       double dx, double dy,
 410                       double originX, double originY,
 411                       CharCode code, int nBytes, Unicode *u, int uLen)
 412 {
 413     double m11,m21,m12,m22;
 414     state->getFontTransMat(&m11, &m12, &m21, &m22);
 415     m11 *= state->getHorizScaling();
 416     m21 *= state->getHorizScaling();
 417     double lenx = sqrt(m11*m11 + m12*m12);
 418     double leny = sqrt(m21*m21 + m22*m22);
 419     double len = lenx>leny?lenx:leny;
 420     if(!currentfont || !currentfont->splash_font) {
 421         return; //error
 422     }
 423     if(currentfont && currentfont->max_size < len) {
 424         currentfont->max_size = len;
 425     }
 426
 427     num_textfields++;
 428
 429     currentfont->grow(code+1);
 430     GlyphInfo*g = currentfont->glyphs[code];
 431     if(!g) {
 432         g = currentfont->glyphs[code] = new GlyphInfo();
 433         g->advance_max = 0;
 434         currentfont->splash_font->last_advance = -1;
 435         g->path = currentfont->splash_font->getGlyphPath(code);
 436         g->advance = currentfont->splash_font->last_advance;
 437         g->unicode = 0;
 438     }
 439     if(uLen && ((u[0]>=32 && u[0]<g->unicode) || !g->unicode)) {
 440         g->unicode = u[0];
 441     }
 442     if(currentfont->lastchar>=0 && currentfont->lasty == y) {
 443         double xshift = (x - currentfont->lastx);
 444         if(xshift>=0 && xshift > g->advance_max) {
 445             g->advance_max = xshift;
 446         }
 447         int advance = (int)xshift;
 448         if(advance>=0 && advance<g->advance*4 && advance!=currentfont->lastadvance) {
 449             int c1 = currentfont->lastchar;
 450             int c2 = code;
 451             dict_t*d = currentfont->kerning[c1];
 452             if(!d) {
 453                 d = currentfont->kerning[c1] = dict_new2(&int_type);
 454             }
 455             mtf_t*k = (mtf_t*)dict_lookup(d, (void*)(ptroff_t)c2);
 456             if(!k) {
 457                 k = mtf_new(&int_type);
 458                 dict_put(d, (void*)(ptroff_t)c2, k);
 459             }
 460             mtf_increase(k, (void*)(ptroff_t)advance);
 461         }
 462     }
 463
 464     currentfont->lastx = x;
 465     currentfont->lasty = y;
 466     currentfont->lastchar = code;
 467     currentfont->lastadvance = (int)(g->advance+0.5);
 468 }
 469
 470 GBool InfoOutputDev::beginType3Char(GfxState *state, double x, double y, double dx, double dy, CharCode code, Unicode *u, int uLen)
 471 {
 472     GfxFont*font = state->getFont();
 473     if(!font)
 474         return gTrue;
 475     if(font->getType() != fontType3)
 476         return gTrue;
 477
 478     char*id = getFontID(font);
 479     currentfont = (FontInfo*)id2font->lookup(id);
 480     if(!currentfont) {
 481         currentfont = new FontInfo(id);
 482         currentfont->font = font;
 483         GString* idStr = new GString(id);
 484         id2font->add(idStr, (void*)currentfont);
 485         num_fonts++;
 486     }
 487     currentfont = currentfont;
 488     free(id);
 489
 490     currentfont->grow(code+1);
 491     if(!currentfont->glyphs[code]) {
 492         currentglyph = currentfont->glyphs[code] = new GlyphInfo();
 493         currentglyph->unicode = uLen?u[0]:0;
 494         currentglyph->path = new SplashPath();
 495         currentglyph->x1=0;
 496         currentglyph->y1=0;
 497         currentglyph->x2=dx;
 498         currentglyph->y2=dy;
 499         currentglyph->advance=dx;
 500         return gFalse;
 501     } else {
 502         return gTrue;
 503     }
 504 }
 505
 506 void InfoOutputDev::type3D0(GfxState *state, double wx, double wy)
 507 {
 508     currentglyph->x1=0;
 509     currentglyph->y1=0;
 510     currentglyph->x2=wx;
 511     currentglyph->y2=wy;
 512 }
 513
 514 void InfoOutputDev::type3D1(GfxState *state, double wx, double wy, double llx, double lly, double urx, double ury)
 515 {
 516     if(-lly>currentfont->descender)
 517         currentfont->descender = -lly;
 518     if(ury>currentfont->ascender)
 519         currentfont->ascender = ury;
 520
 521     currentglyph->x1=llx;
 522     currentglyph->y1=lly;
 523     currentglyph->x2=urx;
 524     currentglyph->y2=ury;
 525 }
 526
 527 void InfoOutputDev::endType3Char(GfxState *state)
 528 {
 529     double x1 = currentglyph->x1;
 530     double y1 = currentglyph->y1;
 531     double x2 = currentglyph->x2;
 532     double y2 = currentglyph->y2;
 533     currentglyph->path->moveTo(x1,y1);
 534     currentglyph->path->lineTo(x2,y1);
 535     currentglyph->path->lineTo(x2,y2);
 536     currentglyph->path->lineTo(x1,y2);
 537     currentglyph->path->close();
 538 }
 539
 540 void InfoOutputDev::drawImageMask(GfxState *state, Object *ref, Stream *str,
 541                            int width, int height, GBool invert,
 542                            GBool inlineImg)
 543 {
 544     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 545
 546     OutputDev::drawImageMask(state,ref,str,width,height,invert,inlineImg);
 547 }
 548 void InfoOutputDev::drawImage(GfxState *state, Object *ref, Stream *str,
 549                        int width, int height, GfxImageColorMap *colorMap,
 550                        int *maskColors, GBool inlineImg)
 551 {
 552     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 553
 554     OutputDev::drawImage(state,ref,str,width,height,colorMap,maskColors,inlineImg);
 555 }
 556 void InfoOutputDev::drawMaskedImage(GfxState *state, Object *ref, Stream *str,
 557                                 int width, int height,
 558                                 GfxImageColorMap *colorMap,
 559                                 Stream *maskStr,
 560                                 int maskWidth, int maskHeight,
 561                                 GBool maskInvert)
 562 {
 563     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 564
 565     OutputDev::drawMaskedImage(state,ref,str,width,height,colorMap,maskStr,maskWidth,maskHeight,maskInvert);
 566 }
 567
 568 void InfoOutputDev::drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str,
 569                                     int width, int height,
 570                                     GfxImageColorMap *colorMap,
 571                                     Stream *maskStr,
 572                                     int maskWidth, int maskHeight,
 573                                     GfxImageColorMap *maskColorMap)
 574 {
 575     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 576
 577     OutputDev::drawSoftMaskedImage(state,ref,str,width,height,colorMap,maskStr,maskWidth,maskHeight,maskColorMap);
 578 }
 579
 580 void InfoOutputDev::dumpfonts(gfxdevice_t*dev)
 581 {
 582     GHashIter*i;
 583     GString*key;
 584     FontInfo*font;
 585     id2font->startIter(&i);
 586     while(id2font->getNext(&i, &key, (void**)&font)) {
 587         dev->addfont(dev, font->getGfxFont());
 588     }
 589 }