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 /* there's not yet a way to set this */
  21 int config_fontquality = 10;
  22 int config_bigchar = 0;
  23
  24 InfoOutputDev::InfoOutputDev(XRef*xref)
  25 {
  26     num_links = 0;
  27     num_jpeg_images = 0;
  28     num_ppm_images = 0;
  29     num_textfields = 0;
  30     num_fonts = 0;
  31     num_polygons= 0;
  32     currentfont = 0;
  33     currentglyph = 0;
  34     id2font = new GHash(1);
  35     SplashColor white = {255,255,255};
  36     splash = new SplashOutputDev(splashModeRGB8,320,0,white,0,0);
  37     splash->startDoc(xref);
  38 }
  39 InfoOutputDev::~InfoOutputDev()
  40 {
  41     GHashIter*i;
  42     id2font->startIter(&i);
  43     GString*key;
  44     FontInfo*fontinfo;
  45     while(id2font->getNext(&i, &key, (void**)&fontinfo)) {
  46         delete fontinfo;
  47     }
  48     id2font->killIter(&i);
  49
  50     delete id2font;id2font=0;
  51     delete splash;splash=0;
  52 }
  53 void FontInfo::grow(int size)
  54 {
  55     if(size >= this->num_glyphs) {
  56         this->glyphs = (GlyphInfo**)realloc(this->glyphs, sizeof(GlyphInfo*)*(size));
  57         memset(&this->glyphs[this->num_glyphs], 0, sizeof(SplashPath*)*((size)-this->num_glyphs));
  58         this->num_glyphs = size;
  59     }
  60 }
  61 FontInfo::FontInfo(char*id)
  62 {
  63     this->id = strdup(id);
  64     this->charid2glyph = 0;
  65     this->seen = 0;
  66     this->num_glyphs = 0;
  67     this->glyphs = 0;
  68     this->splash_font = 0;
  69     this->lastchar = -1;
  70     this->lastx = 0;
  71     this->lasty = 0;
  72     this->gfxfont = 0;
  73 }
  74 FontInfo::~FontInfo()
  75 {
  76     if(this->id) {free(this->id);this->id=0;}
  77     this->font = 0;
  78     if(this->charid2glyph) {
  79         free(this->charid2glyph);
  80         this->charid2glyph = 0;
  81     }
  82     int t;
  83     for(t=0;t<num_glyphs;t++) {
  84         if(glyphs[t]) {
  85             delete glyphs[t]->path;glyphs[t]->path = 0;
  86             delete glyphs[t];
  87             glyphs[t]=0;
  88         }
  89     }
  90     free(glyphs);glyphs=0;
  91     if(this->gfxfont)
  92         gfxfont_free(this->gfxfont);
  93 }
  94
  95 gfxfont_t* createGfxFont(FontInfo*src)
  96 {
  97     gfxfont_t*font = (gfxfont_t*)malloc(sizeof(gfxfont_t));
  98     memset(font, 0, sizeof(gfxfont_t));
  99
 100     font->glyphs = (gfxglyph_t*)malloc(sizeof(gfxglyph_t)*src->num_glyphs);
 101     memset(font->glyphs, 0, sizeof(gfxglyph_t)*src->num_glyphs);
 102     font->id = 0;
 103     int t;
 104
 105     double quality = (INTERNAL_FONT_SIZE * 200 / config_fontquality) / src->max_size;
 106     double scale = 1;
 107     //printf("%d glyphs\n", font->num_glyphs);
 108     font->num_glyphs = 0;
 109     font->ascent = fabs(src->descender);
 110     font->descent = fabs(src->ascender);
 111
 112     for(t=0;t<src->num_glyphs;t++) {
 113         if(src->glyphs[t]) {
 114             SplashPath*path = src->glyphs[t]->path;
 115             int len = path?path->getLength():0;
 116             //printf("glyph %d) %08x (%d line segments)\n", t, path, len);
 117             gfxglyph_t*glyph = &font->glyphs[font->num_glyphs];
 118             src->glyphs[t]->glyphid = font->num_glyphs;
 119             glyph->unicode = src->glyphs[t]->unicode;
 120             if(glyph->unicode >= font->max_unicode)
 121                 font->max_unicode = glyph->unicode+1;
 122             gfxdrawer_t drawer;
 123             gfxdrawer_target_gfxline(&drawer);
 124             int s;
 125             int count = 0;
 126             double xmax = 0;
 127             for(s=0;s<len;s++) {
 128                 Guchar f;
 129                 double x, y;
 130                 path->getPoint(s, &x, &y, &f);
 131                 if(!s || x > xmax)
 132                     xmax = x;
 133                 if(f&splashPathFirst) {
 134                     drawer.moveTo(&drawer, x*scale, y*scale);
 135                 }
 136                 if(f&splashPathCurve) {
 137                     double x2,y2;
 138                     path->getPoint(++s, &x2, &y2, &f);
 139                     if(f&splashPathCurve) {
 140                         double x3,y3;
 141                         path->getPoint(++s, &x3, &y3, &f);
 142                         gfxdraw_cubicTo(&drawer, x*scale, y*scale, x2*scale, y2*scale, x3*scale, y3*scale, quality);
 143                     } else {
 144                         drawer.splineTo(&drawer, x*scale, y*scale, x2*scale, y2*scale);
 145                     }
 146                 } else {
 147                     drawer.lineTo(&drawer, x*scale, y*scale);
 148                 }
 149              //   printf("%f %f %s %s\n", x, y, (f&splashPathCurve)?"curve":"",
 150              //                           (f&splashPathFirst)?"first":"",
 151              //                           (f&splashPathLast)?"last":"");
 152             }
 153
 154             glyph->line = (gfxline_t*)drawer.result(&drawer);
 155             if(src->glyphs[t]->advance>0) {
 156                 glyph->advance = src->glyphs[t]->advance;
 157             } else {
 158                 msg("<warning> Approximating advance value for glyph %d", t);
 159                 glyph->advance = xmax*scale;
 160             }
 161             if(config_bigchar) {
 162                 double max = src->glyphs[t]->advance_max;
 163                 if(max>0 && max > glyph->advance) {
 164                     glyph->advance = max;
 165                 }
 166             }
 167
 168             font->num_glyphs++;
 169         }
 170     }
 171     font->unicode2glyph = (int*)malloc(sizeof(int)*font->max_unicode);
 172     memset(font->unicode2glyph, -1, sizeof(int)*font->max_unicode);
 173     for(t=0;t<font->num_glyphs;t++) {
 174         if(font->glyphs[t].unicode>0 && font->glyphs[t].unicode<font->max_unicode) {
 175             font->unicode2glyph[font->glyphs[t].unicode] = t;
 176         }
 177
 178     }
 179     return font;
 180 }
 181
 182
 183 gfxfont_t* FontInfo::getGfxFont()
 184 {
 185     if(!this->gfxfont) {
 186         this->gfxfont = createGfxFont(this);
 187         this->gfxfont->id = strdup(this->id);
 188     }
 189     return this->gfxfont;
 190 }
 191
 192 GBool InfoOutputDev::upsideDown() {return gTrue;}
 193 GBool InfoOutputDev::useDrawChar() {return gTrue;}
 194 GBool InfoOutputDev::interpretType3Chars() {return gTrue;}
 195 GBool InfoOutputDev::useTilingPatternFill() {return gTrue;}
 196
 197 void InfoOutputDev::startPage(int pageNum, GfxState *state, double crop_x1, double crop_y1, double crop_x2, double crop_y2)
 198 {
 199     double x1,y1,x2,y2;
 200     state->transform(crop_x1,crop_y1,&x1,&y1);
 201     state->transform(crop_x2,crop_y2,&x2,&y2);
 202     if(x2<x1) {double x3=x1;x1=x2;x2=x3;}
 203     if(y2<y1) {double y3=y1;y1=y2;y2=y3;}
 204     this->x1 = (int)x1;
 205     this->y1 = (int)y1;
 206     this->x2 = (int)x2;
 207     this->y2 = (int)y2;
 208     msg("<verbose> Generating info structure for page %d", pageNum);
 209 }
 210 void InfoOutputDev::endPage()
 211 {
 212 }
 213 void InfoOutputDev::drawLink(Link *link, Catalog *catalog)
 214 {
 215     num_links++;
 216 }
 217
 218 /*  } else if(!strcmp(key,"fontquality")) {
 219         this->config_fontquality = atof(value);
 220         if(this->config_fontquality<=1)
 221             this->config_fontquality=1;
 222     } else if(!strcmp(key,"bigchar")) {
 223         this->config_bigchar = atoi(value);
 224     }
 225  */
 226
 227 double InfoOutputDev::getMaximumFontSize(char*id)
 228 {
 229     FontInfo*info = (FontInfo*)id2font->lookup(id);
 230     if(!info) {
 231         msg("<error> Unknown font id: %s", id);
 232         return 0.0;
 233     }
 234     return info->max_size;
 235 }
 236
 237 char*getFontID(GfxFont*font)
 238 {
 239     Ref*ref = font->getID();
 240     GString*gstr = font->getName();
 241     char* fname = gstr==0?0:gstr->getCString();
 242     char buf[128];
 243     if(fname==0) {
 244         if(font->getType() == fontType3) {
 245             sprintf(buf, "t3font-%d-%d", ref->num, ref->gen);
 246         } else {
 247             sprintf(buf, "font-%d-%d", ref->num, ref->gen);
 248         }
 249     } else {
 250         sprintf(buf, "%s-%d-%d", fname, ref->num, ref->gen);
 251     }
 252     return strdup(buf);
 253 }
 254
 255 void InfoOutputDev::updateFont(GfxState *state)
 256 {
 257     GfxFont*font = state->getFont();
 258     if(!font) {
 259         currentfont = 0;
 260         return;
 261     }
 262     if(font->getType() == fontType3) {
 263         currentfont = 0;
 264         return;
 265     }
 266     char*id = getFontID(font);
 267
 268     if(currentfont)
 269         currentfont->splash_font = 0;
 270
 271     currentfont = (FontInfo*)id2font->lookup(id);
 272     if(!currentfont) {
 273         currentfont = new FontInfo(id);
 274         currentfont->font = font;
 275         currentfont->max_size = 0;
 276         GString* idStr = new GString(id);
 277         id2font->add(idStr, (void*)currentfont);
 278         num_fonts++;
 279     }
 280
 281     state->setCTM(1.0,0,0,1.0,0,0);
 282     splash->updateCTM(state, 0,0,0,0,0,0);
 283     state->setTextMat(1.0,0,0,1.0,0,0);
 284     state->setFont(font, 1024.0);
 285     splash->doUpdateFont(state);
 286     currentfont->splash_font = splash->getCurrentFont();
 287     if(currentfont->splash_font) {
 288         currentfont->ascender = currentfont->splash_font->ascender;
 289         currentfont->descender = currentfont->splash_font->descender;
 290     } else {
 291         currentfont->ascender = currentfont->descender = 0;
 292     }
 293
 294     free(id);
 295 }
 296
 297 void InfoOutputDev::fill(GfxState *state)
 298 {
 299     num_polygons++;
 300 }
 301
 302 void InfoOutputDev::eoFill(GfxState *state)
 303 {
 304     num_polygons++;
 305 }
 306
 307 FontInfo* InfoOutputDev::getFont(char*id)
 308 {
 309     return (FontInfo*)id2font->lookup(id);
 310 }
 311
 312 void InfoOutputDev::drawChar(GfxState *state, double x, double y,
 313                       double dx, double dy,
 314                       double originX, double originY,
 315                       CharCode code, int nBytes, Unicode *u, int uLen)
 316 {
 317     double m11,m21,m12,m22;
 318     state->getFontTransMat(&m11, &m12, &m21, &m22);
 319     m11 *= state->getHorizScaling();
 320     m21 *= state->getHorizScaling();
 321     double lenx = sqrt(m11*m11 + m12*m12);
 322     double leny = sqrt(m21*m21 + m22*m22);
 323     double len = lenx>leny?lenx:leny;
 324     if(!currentfont || !currentfont->splash_font) {
 325         return; //error
 326     }
 327     if(currentfont && currentfont->max_size < len) {
 328         currentfont->max_size = len;
 329     }
 330
 331     num_textfields++;
 332
 333     currentfont->grow(code+1);
 334     GlyphInfo*g = currentfont->glyphs[code];
 335     if(!g) {
 336         g = currentfont->glyphs[code] = new GlyphInfo();
 337         g->advance_max = 0;
 338         currentfont->splash_font->last_advance = -1;
 339         g->path = currentfont->splash_font->getGlyphPath(code);
 340         g->advance = currentfont->splash_font->last_advance;
 341         g->unicode = 0;
 342     }
 343     if(uLen && (u[0]>=32 && u[0]<g->unicode || !g->unicode)) {
 344         g->unicode = u[0];
 345     }
 346     if(currentfont->lastchar>=0 && currentfont->lasty == y) {
 347         double xshift = x - currentfont->lastx;
 348         if(xshift>=0 && xshift > g->advance_max) {
 349             g->advance_max = xshift;
 350         }
 351     }
 352
 353     currentfont->lastx = x;
 354     currentfont->lasty = y;
 355     currentfont->lastchar = code;
 356 }
 357
 358 GBool InfoOutputDev::beginType3Char(GfxState *state, double x, double y, double dx, double dy, CharCode code, Unicode *u, int uLen)
 359 {
 360     GfxFont*font = state->getFont();
 361     if(!font)
 362         return gTrue;
 363     if(font->getType() != fontType3)
 364         return gTrue;
 365
 366     char*id = getFontID(font);
 367     currentfont = (FontInfo*)id2font->lookup(id);
 368     if(!currentfont) {
 369         currentfont = new FontInfo(id);
 370         currentfont->font = font;
 371         GString* idStr = new GString(id);
 372         id2font->add(idStr, (void*)currentfont);
 373         num_fonts++;
 374     }
 375     currentfont = currentfont;
 376     free(id);
 377
 378     currentfont->grow(code+1);
 379     if(!currentfont->glyphs[code]) {
 380         currentglyph = currentfont->glyphs[code] = new GlyphInfo();
 381         currentglyph->unicode = uLen?u[0]:0;
 382         currentglyph->path = new SplashPath();
 383         currentglyph->x1=0;
 384         currentglyph->y1=0;
 385         currentglyph->x2=dx;
 386         currentglyph->y2=dy;
 387         return gFalse;
 388     } else {
 389         return gTrue;
 390     }
 391 }
 392
 393 void InfoOutputDev::type3D0(GfxState *state, double wx, double wy)
 394 {
 395     currentglyph->x1=0;
 396     currentglyph->y1=0;
 397     currentglyph->x2=wx;
 398     currentglyph->y2=wy;
 399 }
 400
 401 void InfoOutputDev::type3D1(GfxState *state, double wx, double wy, double llx, double lly, double urx, double ury)
 402 {
 403     currentglyph->x1=llx;
 404     currentglyph->y1=lly;
 405     currentglyph->x2=urx;
 406     currentglyph->y2=ury;
 407 }
 408
 409 void InfoOutputDev::endType3Char(GfxState *state)
 410 {
 411     double x1 = currentglyph->x1;
 412     double y1 = currentglyph->y1;
 413     double x2 = currentglyph->x2;
 414     double y2 = currentglyph->y2;
 415     currentglyph->path->moveTo(x1,y1);
 416     currentglyph->path->lineTo(x2,y1);
 417     currentglyph->path->lineTo(x2,y2);
 418     currentglyph->path->lineTo(x1,y2);
 419     currentglyph->path->close();
 420 }
 421
 422 void InfoOutputDev::drawImageMask(GfxState *state, Object *ref, Stream *str,
 423                            int width, int height, GBool invert,
 424                            GBool inlineImg)
 425 {
 426     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 427
 428     OutputDev::drawImageMask(state,ref,str,width,height,invert,inlineImg);
 429 }
 430 void InfoOutputDev::drawImage(GfxState *state, Object *ref, Stream *str,
 431                        int width, int height, GfxImageColorMap *colorMap,
 432                        int *maskColors, GBool inlineImg)
 433 {
 434     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 435
 436     OutputDev::drawImage(state,ref,str,width,height,colorMap,maskColors,inlineImg);
 437 }
 438 void InfoOutputDev::drawMaskedImage(GfxState *state, Object *ref, Stream *str,
 439                                 int width, int height,
 440                                 GfxImageColorMap *colorMap,
 441                                 Stream *maskStr,
 442                                 int maskWidth, int maskHeight,
 443                                 GBool maskInvert)
 444 {
 445     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 446
 447     OutputDev::drawMaskedImage(state,ref,str,width,height,colorMap,maskStr,maskWidth,maskHeight,maskInvert);
 448 }
 449
 450 void InfoOutputDev::drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str,
 451                                     int width, int height,
 452                                     GfxImageColorMap *colorMap,
 453                                     Stream *maskStr,
 454                                     int maskWidth, int maskHeight,
 455                                     GfxImageColorMap *maskColorMap)
 456 {
 457     if(str->getKind()==strDCT) num_jpeg_images++; else num_ppm_images++;
 458
 459     OutputDev::drawSoftMaskedImage(state,ref,str,width,height,colorMap,maskStr,maskWidth,maskHeight,maskColorMap);
 460 }
 461
 462 void InfoOutputDev::dumpfonts(gfxdevice_t*dev)
 463 {
 464     GHashIter*i;
 465     GString*key;
 466     FontInfo*font;
 467     id2font->startIter(&i);
 468     while(id2font->getNext(&i, &key, (void**)&font)) {
 469         dev->addfont(dev, font->getGfxFont());
 470     }
 471 }