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_images = 0;
  24     num_fonts = 0;
  25     num_polygons= 0;
  26     currentfont = 0;
  27     currentglyph = 0;
  28     id2font = new GHash(1);
  29     SplashColor white = {255,255,255};
  30     splash = new SplashOutputDev(splashModeRGB8,320,0,white,0,0);
  31     splash->startDoc(xref);
  32 }
  33 InfoOutputDev::~InfoOutputDev()
  34 {
  35     GHashIter*i;
  36     id2font->startIter(&i);
  37     GString*key;
  38     FontInfo*fontinfo;
  39     while(id2font->getNext(&i, &key, (void**)&fontinfo)) {
  40         delete fontinfo;
  41     }
  42     id2font->killIter(&i);
  43
  44     delete id2font;id2font=0;
  45     delete splash;splash=0;
  46 }
  47 void FontInfo::grow(int size)
  48 {
  49     if(size >= this->num_glyphs) {
  50         this->glyphs = (GlyphInfo**)realloc(this->glyphs, sizeof(GlyphInfo*)*(size));
  51         memset(&this->glyphs[this->num_glyphs], 0, sizeof(SplashPath*)*((size)-this->num_glyphs));
  52         this->num_glyphs = size;
  53     }
  54 }
  55 FontInfo::FontInfo()
  56 {
  57     this->charid2glyph = 0;
  58     this->seen = 0;
  59     this->num_glyphs = 0;
  60     this->glyphs = 0;
  61     this->splash_font = 0;
  62     this->lastchar = -1;
  63     this->lastx = 0;
  64     this->lasty = 0;
  65 }
  66 FontInfo::~FontInfo()
  67 {
  68     this->font = 0;
  69     if(this->charid2glyph) {
  70         free(this->charid2glyph);
  71         this->charid2glyph = 0;
  72     }
  73     int t;
  74     for(t=0;t<num_glyphs;t++) {
  75         if(glyphs[t]) {
  76             delete glyphs[t]->path;glyphs[t]->path = 0;
  77             delete glyphs[t];
  78             glyphs[t]=0;
  79         }
  80     }
  81     free(glyphs);glyphs=0;
  82 }
  83 GBool InfoOutputDev::upsideDown() {return gTrue;}
  84 GBool InfoOutputDev::useDrawChar() {return gTrue;}
  85 GBool InfoOutputDev::interpretType3Chars() {return gTrue;}
  86 GBool InfoOutputDev::useTilingPatternFill() {return gTrue;}
  87
  88 void InfoOutputDev::startPage(int pageNum, GfxState *state, double crop_x1, double crop_y1, double crop_x2, double crop_y2)
  89 {
  90     double x1,y1,x2,y2;
  91     state->transform(crop_x1,crop_y1,&x1,&y1);
  92     state->transform(crop_x2,crop_y2,&x2,&y2);
  93     if(x2<x1) {double x3=x1;x1=x2;x2=x3;}
  94     if(y2<y1) {double y3=y1;y1=y2;y2=y3;}
  95     this->x1 = (int)x1;
  96     this->y1 = (int)y1;
  97     this->x2 = (int)x2;
  98     this->y2 = (int)y2;
  99     msg("<verbose> Generating info structure for page %d", pageNum);
 100 }
 101 void InfoOutputDev::endPage()
 102 {
 103 }
 104 void InfoOutputDev::drawLink(Link *link, Catalog *catalog)
 105 {
 106     num_links++;
 107 }
 108 double InfoOutputDev::getMaximumFontSize(char*id)
 109 {
 110     FontInfo*info = (FontInfo*)id2font->lookup(id);
 111     if(!info) {
 112         msg("<error> Unknown font id: %s", id);
 113         return 0.0;
 114     }
 115     return info->max_size;
 116 }
 117
 118 char*getFontID(GfxFont*font)
 119 {
 120     Ref*ref = font->getID();
 121     GString*gstr = font->getName();
 122     char* fname = gstr==0?0:gstr->getCString();
 123     char buf[128];
 124     if(fname==0) {
 125         if(font->getType() == fontType3) {
 126             sprintf(buf, "t3font-%d-%d", ref->num, ref->gen);
 127         } else {
 128             sprintf(buf, "font-%d-%d", ref->num, ref->gen);
 129         }
 130     } else {
 131         sprintf(buf, "%s-%d-%d", fname, ref->num, ref->gen);
 132     }
 133     return strdup(buf);
 134 }
 135
 136 void InfoOutputDev::updateFont(GfxState *state)
 137 {
 138     GfxFont*font = state->getFont();
 139     if(!font) {
 140         currentfont = 0;
 141         return;
 142     }
 143     if(font->getType() == fontType3) {
 144         currentfont = 0;
 145         return;
 146     }
 147     char*id = getFontID(font);
 148
 149     if(currentfont)
 150         currentfont->splash_font = 0;
 151
 152     currentfont = (FontInfo*)id2font->lookup(id);
 153     if(!currentfont) {
 154         currentfont = new FontInfo;
 155         currentfont->font = font;
 156         currentfont->max_size = 0;
 157         GString* idStr = new GString(id);
 158         id2font->add(idStr, (void*)currentfont);
 159         num_fonts++;
 160     }
 161
 162     state->setCTM(1.0,0,0,1.0,0,0);
 163     splash->updateCTM(state, 0,0,0,0,0,0);
 164     state->setTextMat(1.0,0,0,1.0,0,0);
 165     state->setFont(font, 1024.0);
 166     splash->doUpdateFont(state);
 167     currentfont->splash_font = splash->getCurrentFont();
 168     currentfont->ascender = currentfont->splash_font->ascender;
 169     currentfont->descender = currentfont->splash_font->descender;
 170     free(id);
 171 }
 172
 173 void InfoOutputDev::fill(GfxState *state)
 174 {
 175     num_polygons++;
 176 }
 177
 178 void InfoOutputDev::eoFill(GfxState *state)
 179 {
 180     num_polygons++;
 181 }
 182
 183 FontInfo* InfoOutputDev::getFont(char*id)
 184 {
 185     return (FontInfo*)id2font->lookup(id);
 186 }
 187
 188 void InfoOutputDev::drawChar(GfxState *state, double x, double y,
 189                       double dx, double dy,
 190                       double originX, double originY,
 191                       CharCode code, int nBytes, Unicode *u, int uLen)
 192 {
 193     double m11,m21,m12,m22;
 194     state->getFontTransMat(&m11, &m12, &m21, &m22);
 195     m11 *= state->getHorizScaling();
 196     m21 *= state->getHorizScaling();
 197     double lenx = sqrt(m11*m11 + m12*m12);
 198     double leny = sqrt(m21*m21 + m22*m22);
 199     double len = lenx>leny?lenx:leny;
 200     if(!currentfont || !currentfont->splash_font) {
 201         return; //error
 202     }
 203     if(currentfont && currentfont->max_size < len) {
 204         currentfont->max_size = len;
 205     }
 206     currentfont->grow(code+1);
 207     GlyphInfo*g = currentfont->glyphs[code];
 208     if(!g) {
 209         g = currentfont->glyphs[code] = new GlyphInfo();
 210         g->advance_samples = 0;
 211         currentfont->splash_font->last_advance = -1;
 212         g->path = currentfont->splash_font->getGlyphPath(code);
 213         g->advance = currentfont->splash_font->last_advance;
 214         g->unicode = 0;
 215     }
 216     if(uLen && (u[0]>=32 && u[0]<g->unicode || !g->unicode)) {
 217         g->unicode = u[0];
 218     }
 219     if(currentfont->lastchar>=0 && currentfont->lasty == y) {
 220         double xshift = x - currentfont->lastx;
 221         if(xshift>=0) {
 222             AdvanceSample* old = g->advance_samples;
 223             g->advance_samples = new AdvanceSample();
 224             g->advance_samples->next = old;
 225             g->advance_samples->advance = xshift;
 226         }
 227     }
 228
 229     currentfont->lastx = x;
 230     currentfont->lasty = y;
 231     currentfont->lastchar = code;
 232 }
 233
 234 static int compare_double(const void *_a, const void *_b)
 235 {
 236     const double*a = (const double*)_a;
 237     const double*b = (const double*)_b;
 238     if(*a < *b)
 239         return -1;
 240     if(*a > *b)
 241         return 1;
 242     return 0;
 243 }
 244
 245 double GlyphInfo::estimateAdvance()
 246 {
 247     AdvanceSample*a = advance_samples;
 248     int n=0;
 249     while(a) {
 250         n++;
 251         a = a->next;
 252     }
 253     if(!n)
 254         return -1;
 255     double*list = (double*)malloc(sizeof(double)*n);
 256     n = 0;
 257     a = advance_samples;
 258     while(a) {
 259         list[n++] = a->advance;
 260         a = a->next;
 261     }
 262     // FIXME: a true median algorithm would be faster
 263     qsort(list, n, sizeof(double), compare_double);
 264     double median = list[n/2];
 265     free(list);
 266     return median;
 267 }
 268
 269 GBool InfoOutputDev::beginType3Char(GfxState *state, double x, double y, double dx, double dy, CharCode code, Unicode *u, int uLen)
 270 {
 271     GfxFont*font = state->getFont();
 272     if(!font)
 273         return gTrue;
 274     if(font->getType() != fontType3)
 275         return gTrue;
 276
 277     char*id = getFontID(font);
 278     currentfont = (FontInfo*)id2font->lookup(id);
 279     if(!currentfont) {
 280         currentfont = new FontInfo;
 281         currentfont->font = font;
 282         GString* idStr = new GString(id);
 283         id2font->add(idStr, (void*)currentfont);
 284         num_fonts++;
 285     }
 286     currentfont = currentfont;
 287     free(id);
 288
 289     currentfont->grow(code+1);
 290     if(!currentfont->glyphs[code]) {
 291         currentglyph = currentfont->glyphs[code] = new GlyphInfo();
 292         currentglyph->unicode = uLen?u[0]:0;
 293         currentglyph->path = new SplashPath();
 294         currentglyph->x1=0;
 295         currentglyph->y1=0;
 296         currentglyph->x2=dx;
 297         currentglyph->y2=dy;
 298         return gFalse;
 299     } else {
 300         return gTrue;
 301     }
 302 }
 303
 304 void InfoOutputDev::type3D0(GfxState *state, double wx, double wy)
 305 {
 306     currentglyph->x1=0;
 307     currentglyph->y1=0;
 308     currentglyph->x2=wx;
 309     currentglyph->y2=wy;
 310 }
 311
 312 void InfoOutputDev::type3D1(GfxState *state, double wx, double wy, double llx, double lly, double urx, double ury)
 313 {
 314     currentglyph->x1=llx;
 315     currentglyph->y1=lly;
 316     currentglyph->x2=urx;
 317     currentglyph->y2=ury;
 318 }
 319
 320 void InfoOutputDev::endType3Char(GfxState *state)
 321 {
 322     double x1 = currentglyph->x1;
 323     double y1 = currentglyph->y1;
 324     double x2 = currentglyph->x2;
 325     double y2 = currentglyph->y2;
 326     currentglyph->path->moveTo(x1,y1);
 327     currentglyph->path->lineTo(x2,y1);
 328     currentglyph->path->lineTo(x2,y2);
 329     currentglyph->path->lineTo(x1,y2);
 330     currentglyph->path->close();
 331 }
 332
 333 void InfoOutputDev::drawImageMask(GfxState *state, Object *ref, Stream *str,
 334                            int width, int height, GBool invert,
 335                            GBool inlineImg)
 336 {
 337     num_images++;
 338     OutputDev::drawImageMask(state,ref,str,width,height,invert,inlineImg);
 339 }
 340 void InfoOutputDev::drawImage(GfxState *state, Object *ref, Stream *str,
 341                        int width, int height, GfxImageColorMap *colorMap,
 342                        int *maskColors, GBool inlineImg)
 343 {
 344     num_images++;
 345     OutputDev::drawImage(state,ref,str,width,height,colorMap,maskColors,inlineImg);
 346 }
 347 void InfoOutputDev::drawMaskedImage(GfxState *state, Object *ref, Stream *str,
 348                                 int width, int height,
 349                                 GfxImageColorMap *colorMap,
 350                                 Stream *maskStr,
 351                                 int maskWidth, int maskHeight,
 352                                 GBool maskInvert)
 353 {
 354     OutputDev::drawMaskedImage(state,ref,str,width,height,colorMap,maskStr,maskWidth,maskHeight,maskInvert);
 355 }
 356
 357 void InfoOutputDev::drawSoftMaskedImage(GfxState *state, Object *ref, Stream *str,
 358                                     int width, int height,
 359                                     GfxImageColorMap *colorMap,
 360                                     Stream *maskStr,
 361                                     int maskWidth, int maskHeight,
 362                                     GfxImageColorMap *maskColorMap)
 363 {
 364     OutputDev::drawSoftMaskedImage(state,ref,str,width,height,colorMap,maskStr,maskWidth,maskHeight,maskColorMap);
 365 }