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 <math.h>
  19
  20 InfoOutputDev::InfoOutputDev(XRef*xref)
  21 {
  22     num_links = 0;
  23     num_jpeg_images = 0;
  24     num_ppm_images = 0;
  25     num_fonts = 0;
  26     num_polygons= 0;
  27     fonts = 0;
  28     currentfont = 0;
  29     currentglyph = 0;
  30     id2font = new GHash(1);
  31     SplashColor white = {255,255,255};
  32     splash = new SplashOutputDev(splashModeRGB8,320,0,white,0,0);
  33     splash->startDoc(xref);
  34 }
  35 InfoOutputDev::~InfoOutputDev()
  36 {
  37     GHashIter*i;
  38     id2font->startIter(&i);
  39     GString*key;
  40     FontInfo*fontinfo;
  41     while(id2font->getNext(&i, &key, (void**)&fontinfo)) {
  42         delete fontinfo;
  43     }
  44     id2font->killIter(&i);
  45
  46     delete id2font;id2font=0;
  47     delete splash;splash=0;
  48 }
  49 void FontInfo::grow(int size)
  50 {
  51     if(size >= this->num_glyphs) {
  52         this->glyphs = (GlyphInfo**)realloc(this->glyphs, sizeof(GlyphInfo*)*(size));
  53         memset(&this->glyphs[this->num_glyphs], 0, sizeof(SplashPath*)*((size)-this->num_glyphs));
  54         this->num_glyphs = size;
  55     }
  56 }
  57 FontInfo::FontInfo()
  58 {
  59     this->charid2glyph = 0;
  60     this->seen = 0;
  61     this->num_glyphs = 0;
  62     this->glyphs = 0;
  63     this->splash_font = 0;
  64     this->lastchar = -1;
  65     this->lastx = 0;
  66     this->lasty = 0;
  67     this->gfxfont = 0;
  68 }
  69 FontInfo::~FontInfo()
  70 {
  71     this->font = 0;
  72     if(this->charid2glyph) {
  73         free(this->charid2glyph);
  74         this->charid2glyph = 0;
  75     }
  76     int t;
  77     for(t=0;t<num_glyphs;t++) {
  78         if(glyphs[t]) {
  79             delete glyphs[t]->path;glyphs[t]->path = 0;
  80             delete glyphs[t];
  81             glyphs[t]=0;
  82         }
  83     }
  84     free(glyphs);glyphs=0;
  85 }
  86 GBool InfoOutputDev::upsideDown() {return gTrue;}
  87 GBool InfoOutputDev::useDrawChar() {return gTrue;}
  88 GBool InfoOutputDev::interpretType3Chars() {return gTrue;}
  89 GBool InfoOutputDev::useTilingPatternFill() {return gTrue;}
  90
  91 void InfoOutputDev::startPage(int pageNum, GfxState *state, double crop_x1, double crop_y1, double crop_x2, double crop_y2)
  92 {
  93     double x1,y1,x2,y2;
  94     state->transform(crop_x1,crop_y1,&x1,&y1);
  95     state->transform(crop_x2,crop_y2,&x2,&y2);
  96     if(x2<x1) {double x3=x1;x1=x2;x2=x3;}
  97     if(y2<y1) {double y3=y1;y1=y2;y2=y3;}
  98     this->x1 = (int)x1;
  99     this->y1 = (int)y1;
 100     this->x2 = (int)x2;
 101     this->y2 = (int)y2;
 102     msg("<verbose> Generating info structure for page %d", pageNum);
 103 }
 104 void InfoOutputDev::endPage()
 105 {
 106 }
 107 void InfoOutputDev::drawLink(Link *link, Catalog *catalog)
 108 {
 109     num_links++;
 110 }
 111
 112 /* there's not yet a way to set this */
 113 int config_fontquality = 10;
 114 int config_bigchar = 0;
 115
 116 /*  } else if(!strcmp(key,"fontquality")) {
 117         this->config_fontquality = atof(value);
 118         if(this->config_fontquality<=1)
 119             this->config_fontquality=1;
 120     } else if(!strcmp(key,"bigchar")) {
 121         this->config_bigchar = atoi(value);
 122     }
 123  */
 124
 125 gfxfont_t* InfoOutputDev::createGfxFont(GfxFont*xpdffont, FontInfo*src)
 126 {
 127     gfxfont_t*font = (gfxfont_t*)malloc(sizeof(gfxfont_t));
 128     memset(font, 0, sizeof(gfxfont_t));
 129
 130     font->glyphs = (gfxglyph_t*)malloc(sizeof(gfxglyph_t)*src->num_glyphs);
 131     memset(font->glyphs, 0, sizeof(gfxglyph_t)*src->num_glyphs);
 132     font->id = 0;
 133     int t;
 134
 135     double quality = (INTERNAL_FONT_SIZE * 200 / config_fontquality) / src->max_size;
 136     double scale = 1;
 137     //printf("%d glyphs\n", font->num_glyphs);
 138     font->num_glyphs = 0;
 139     font->ascent = fabs(src->descender);
 140     font->descent = fabs(src->ascender);
 141
 142     for(t=0;t<src->num_glyphs;t++) {
 143         if(src->glyphs[t]) {
 144             SplashPath*path = src->glyphs[t]->path;
 145             int len = path?path->getLength():0;
 146             //printf("glyph %d) %08x (%d line segments)\n", t, path, len);
 147             gfxglyph_t*glyph = &font->glyphs[font->num_glyphs];
 148             src->glyphs[t]->glyphid = font->num_glyphs;
 149             glyph->unicode = src->glyphs[t]->unicode;
 150             if(glyph->unicode >= font->max_unicode)
 151                 font->max_unicode = glyph->unicode+1;
 152             gfxdrawer_t drawer;
 153             gfxdrawer_target_gfxline(&drawer);
 154             int s;
 155             int count = 0;
 156             double xmax = 0;
 157             for(s=0;s<len;s++) {
 158                 Guchar f;
 159                 double x, y;
 160                 path->getPoint(s, &x, &y, &f);
 161                 if(!s || x > xmax)
 162                     xmax = x;
 163                 if(f&splashPathFirst) {
 164                     drawer.moveTo(&drawer, x*scale, y*scale);
 165                 }
 166                 if(f&splashPathCurve) {
 167                     double x2,y2;
 168                     path->getPoint(++s, &x2, &y2, &f);
 169                     if(f&splashPathCurve) {
 170                         double x3,y3;
 171                         path->getPoint(++s, &x3, &y3, &f);
 172                         gfxdraw_cubicTo(&drawer, x*scale, y*scale, x2*scale, y2*scale, x3*scale, y3*scale, quality);
 173                     } else {
 174                         drawer.splineTo(&drawer, x*scale, y*scale, x2*scale, y2*scale);
 175                     }
 176                 } else {
 177                     drawer.lineTo(&drawer, x*scale, y*scale);
 178                 }
 179              //   printf("%f %f %s %s\n", x, y, (f&splashPathCurve)?"curve":"",
 180              //                           (f&splashPathFirst)?"first":"",
 181              //                           (f&splashPathLast)?"last":"");
 182             }
 183
 184             glyph->line = (gfxline_t*)drawer.result(&drawer);
 185             if(src->glyphs[t]->advance>0) {
 186                 glyph->advance = src->glyphs[t]->advance;
 187             } else {
 188                 msg("<warning> Approximating advance value for glyph %d", t);
 189                 glyph->advance = xmax*scale;
 190             }
 191             if(config_bigchar) {
 192                 double max = src->glyphs[t]->advance_max;
 193                 if(max>0 && max > glyph->advance) {
 194                     glyph->advance = max;
 195                 }
 196             }
 197
 198             font->num_glyphs++;
 199         }
 200     }
 201     font->unicode2glyph = (int*)malloc(sizeof(int)*font->max_unicode);
 202     memset(font->unicode2glyph, -1, sizeof(int)*font->max_unicode);
 203     for(t=0;t<font->num_glyphs;t++) {
 204         if(font->glyphs[t].unicode>0 && font->glyphs[t].unicode<font->max_unicode) {
 205             font->unicode2glyph[font->glyphs[t].unicode] = t;
 206         }
 207
 208     }
 209     //msg("<trace> %d glyphs.", t, font->num_glyphs);
 210     return font;
 211 }
 212
 213 double InfoOutputDev::getMaximumFontSize(char*id)
 214 {
 215     FontInfo*info = (FontInfo*)id2font->lookup(id);
 216     if(!info) {
 217         msg("<error> Unknown font id: %s", id);
 218         return 0.0;
 219     }
 220     return info->max_size;
 221 }
 222
 223 char*getFontID(GfxFont*font)
 224 {
 225     Ref*ref = font->getID();
 226     GString*gstr = font->getName();
 227     char* fname = gstr==0?0:gstr->getCString();
 228     char buf[128];
 229     if(fname==0) {
 230         if(font->getType() == fontType3) {
 231             sprintf(buf, "t3font-%d-%d", ref->num, ref->gen);
 232         } else {
 233             sprintf(buf, "font-%d-%d", ref->num, ref->gen);
 234         }
 235     } else {
 236         sprintf(buf, "%s-%d-%d", fname, ref->num, ref->gen);
 237     }
 238     return strdup(buf);
 239 }
 240
 241 void InfoOutputDev::updateFont(GfxState *state)
 242 {
 243     GfxFont*font = state->getFont();
 244     if(!font) {
 245         currentfont = 0;
 246         return;
 247     }
 248     if(font->getType() == fontType3) {
 249         currentfont = 0;
 250         return;
 251     }
 252     char*id = getFontID(font);
 253
 254     if(currentfont)
 255         currentfont->splash_font = 0;
 256
 257     currentfont = (FontInfo*)id2font->lookup(id);
 258     if(!currentfont) {
 259         currentfont = new FontInfo;
 260         currentfont->font = font;
 261         currentfont->max_size = 0;
 262         GString* idStr = new GString(id);
 263         id2font->add(idStr, (void*)currentfont);
 264         num_fonts++;
 265     }
 266
 267     state->setCTM(1.0,0,0,1.0,0,0);
 268     splash->updateCTM(state, 0,0,0,0,0,0);
 269     state->setTextMat(1.0,0,0,1.0,0,0);
 270     state->setFont(font, 1024.0);
 271     splash->doUpdateFont(state);
 272     currentfont->splash_font = splash->getCurrentFont();
 273     if(currentfont->splash_font) {
 274         currentfont->ascender = currentfont->splash_font->ascender;
 275         currentfont->descender = currentfont->splash_font->descender;
 276     } else {
 277         currentfont->ascender = currentfont->descender = 0;
 278     }
 279
 280     currentfont->gfxfont = this->createGfxFont(font, currentfont);
 281     currentfont->gfxfont->id = strdup(id);
 282     fonts = gfxfontlist_addfont(fonts, currentfont->gfxfont);
 283
 284     free(id);
 285 }
 286
 287 void InfoOutputDev::fill(GfxState *state)
 288 {
 289     num_polygons++;
 290 }
 291
 292 void InfoOutputDev::eoFill(GfxState *state)
 293 {
 294     num_polygons++;
 295 }
 296
 297 FontInfo* InfoOutputDev::getFont(char*id)
 298 {
 299     return (FontInfo*)id2font->lookup(id);
 300 }
 301
 302 void InfoOutputDev::drawChar(GfxState *state, double x, double y,
 303                       double dx, double dy,
 304                       double originX, double originY,
 305                       CharCode code, int nBytes, Unicode *u, int uLen)
 306 {
 307     double m11,m21,m12,m22;
 308     state->getFontTransMat(&m11, &m12, &m21, &m22);
 309     m11 *= state->getHorizScaling();
 310     m21 *= state->getHorizScaling();
 311     double lenx = sqrt(m11*m11 + m12*m12);
 312     double leny = sqrt(m21*m21 + m22*m22);
 313     double len = lenx>leny?lenx:leny;
 314     if(!currentfont || !currentfont->splash_font) {
 315         return; //error
 316     }
 317     if(currentfont && currentfont->max_size < len) {
 318         currentfont->max_size = len;
 319     }
 320     currentfont->grow(code+1);
 321     GlyphInfo*g = currentfont->glyphs[code];
 322     if(!g) {
 323         g = currentfont->glyphs[code] = new GlyphInfo();
 324         g->advance_max = 0;
 325         currentfont->splash_font->last_advance = -1;
 326         g->path = currentfont->splash_font->getGlyphPath(code);
 327         g->advance = currentfont->splash_font->last_advance;
 328         g->unicode = 0;
 329     }
 330     if(uLen && (u[0]>=32 && u[0]<g->unicode || !g->unicode)) {
 331         g->unicode = u[0];
 332     }
 333     if(currentfont->lastchar>=0 && currentfont->lasty == y) {
 334         double xshift = x - currentfont->lastx;
 335         if(xshift>=0 && xshift > g->advance_max) {
 336             g->advance_max = xshift;
 337         }
 338     }
 339
 340     currentfont->lastx = x;
 341     currentfont->lasty = y;
 342     currentfont->lastchar = code;
 343 }
 344
 345 GBool InfoOutputDev::beginType3Char(GfxState *state, double x, double y, double dx, double dy, CharCode code, Unicode *u, int uLen)
 346 {
 347     GfxFont*font = state->getFont();
 348     if(!font)
 349         return gTrue;
 350     if(font->getType() != fontType3)
 351         return gTrue;
 352
 353     char*id = getFontID(font);
 354     currentfont = (FontInfo*)id2font->lookup(id);
 355     if(!currentfont) {
 356         currentfont = new FontInfo;
 357         currentfont->font = font;
 358         GString* idStr = new GString(id);
 359         id2font->add(idStr, (void*)currentfont);
 360         num_fonts++;
 361     }
 362     currentfont = currentfont;
 363     free(id);
 364
 365     currentfont->grow(code+1);
 366     if(!currentfont->glyphs[code]) {
 367         currentglyph = currentfont->glyphs[code] = new GlyphInfo();
 368         currentglyph->unicode = uLen?u[0]:0;
 369         currentglyph->path = new SplashPath();
 370         currentglyph->x1=0;
 371         currentglyph->y1=0;
 372         currentglyph->x2=dx;
 373         currentglyph->y2=dy;
 374         return gFalse;
 375     } else {
 376         return gTrue;
 377     }
 378 }
 379
 380 void InfoOutputDev::type3D0(GfxState *state, double wx, double wy)
 381 {
 382     currentglyph->x1=0;
 383     currentglyph->y1=0;
 384     currentglyph->x2=wx;
 385     currentglyph->y2=wy;
 386 }
 387
 388 void InfoOutputDev::type3D1(GfxState *state, double wx, double wy, double llx, double lly, double urx, double ury)
 389 {
 390     currentglyph->x1=llx;
 391     currentglyph->y1=lly;
 392     currentglyph->x2=urx;
 393     currentglyph->y2=ury;
 394 }
 395
 396 void InfoOutputDev::endType3Char(GfxState *state)
 397 {
 398     double x1 = currentglyph->x1;
 399     double y1 = currentglyph->y1;
 400     double x2 = currentglyph->x2;
 401     double y2 = currentglyph->y2;
 402     currentglyph->path->moveTo(x1,y1);
 403     currentglyph->path->lineTo(x2,y1);
 404     currentglyph->path->lineTo(x2,y2);
 405     currentglyph->path->lineTo(x1,y2);
 406     currentglyph->path->close();
 407 }
 408
 409 void InfoOutputDev::drawImageMask(GfxState *state, Object *ref, Stream *str,
 410                            int width, int height, GBool invert,
 411                            GBool inlineImg)
 412 {
 413     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 414
 415     OutputDev::drawImageMask(state,ref,str,width,height,invert,inlineImg);
 416 }
 417 void InfoOutputDev::drawImage(GfxState *state, Object *ref, Stream *str,
 418                        int width, int height, GfxImageColorMap *colorMap,
 419                        int *maskColors, GBool inlineImg)
 420 {
 421     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 422
 423     OutputDev::drawImage(state,ref,str,width,height,colorMap,maskColors,inlineImg);
 424 }
 425 void InfoOutputDev::drawMaskedImage(GfxState *state, Object *ref, Stream *str,
 426                                 int width, int height,
 427                                 GfxImageColorMap *colorMap,
 428                                 Stream *maskStr,
 429                                 int maskWidth, int maskHeight,
 430                                 GBool maskInvert)
 431 {
 432     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 433
 434     OutputDev::drawMaskedImage(state,ref,str,width,height,colorMap,maskStr,maskWidth,maskHeight,maskInvert);
 435 }
 436
 437 void InfoOutputDev::drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str,
 438                                     int width, int height,
 439                                     GfxImageColorMap *colorMap,
 440                                     Stream *maskStr,
 441                                     int maskWidth, int maskHeight,
 442                                     GfxImageColorMap *maskColorMap)
 443 {
 444     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 445
 446     OutputDev::drawSoftMaskedImage(state,ref,str,width,height,colorMap,maskStr,maskWidth,maskHeight,maskColorMap);
 447 }