src/libnrtype/FontInstance.cpp

   1 /*
   2  *  FontInstance.cpp
   3  *  testICU
   4  *
   5  *   Authors:
   6  *     fred
   7  *     bulia byak <buliabyak@users.sf.net>
   8  *
   9  */
  10
  11 #define PANGO_ENABLE_ENGINE
  12
  13 #ifdef HAVE_CONFIG_H
  14 # include <config.h>
  15 #endif
  16 #include <libnr/nr-rect.h>
  17 #include <libnrtype/font-glyph.h>
  18 #include <libnrtype/font-instance.h>
  19 #include <2geom/pathvector.h>
  20 #include <livarot/Path.h>
  21
  22 #include "RasterFont.h"
  23
  24 /* Freetype 2 */
  25 # include <ft2build.h>
  26 # include FT_OUTLINE_H
  27 # include FT_BBOX_H
  28 # include FT_TRUETYPE_TAGS_H
  29 # include FT_TRUETYPE_TABLES_H
  30 # include <pango/pangoft2.h>
  31
  32 #include <tr1/unordered_map>
  33
  34
  35 // the various raster_font in use at a given time are held in a hash_map whose indices are the
  36 // styles, hence the 2 following 'classes'
  37 struct font_style_hash : public std::unary_function<font_style, size_t> {
  38     size_t operator()(font_style const &x) const;
  39 };
  40
  41 struct font_style_equal : public std::binary_function<font_style, font_style, bool> {
  42     bool operator()(font_style const &a, font_style const &b) const;
  43 };
  44
  45
  46 typedef std::tr1::unordered_map<font_style, raster_font*, font_style_hash, font_style_equal> StyleMap;
  47
  48
  49
  50 size_t  font_style_hash::operator()(const font_style &x) const {
  51         int      h=0,n;
  52         n=(int)floor(100*x.stroke_width);
  53         h*=12186;
  54         h+=n;
  55         n=(x.vertical)?1:0;
  56         h*=12186;
  57         h+=n;
  58         if ( x.stroke_width >= 0.01 ) {
  59                 n=x.stroke_cap*10+x.stroke_join+(int)(x.stroke_miter_limit*100);
  60                 h*=12186;
  61                 h+=n;
  62                 if ( x.nbDash > 0 ) {
  63                         n=x.nbDash;
  64                         h*=12186;
  65                         h+=n;
  66                         n=(int)floor(100*x.dash_offset);
  67                         h*=12186;
  68                         h+=n;
  69                         for (int i=0;i<x.nbDash;i++) {
  70                                 n=(int)floor(100*x.dashes[i]);
  71                                 h*=12186;
  72                                 h+=n;
  73                         }
  74                 }
  75         }
  76         return h;
  77 }
  78
  79 bool  font_style_equal::operator()(const font_style &a,const font_style &b) const {
  80     for (int i=0;i<6;i++) {
  81         if ( (int)(100*a.transform[i]) != (int)(100*b.transform[i]) ) return false;
  82     }
  83         if ( a.vertical && b.vertical == false ) return false;
  84         if ( a.vertical == false && b.vertical ) return false;
  85         if ( a.stroke_width > 0.01 && b.stroke_width <= 0.01 ) return false;
  86         if ( a.stroke_width <= 0.01 && b.stroke_width > 0.01 ) return false;
  87         if ( a.stroke_width <= 0.01 && b.stroke_width <= 0.01 ) return true;
  88
  89         if ( a.stroke_cap != b.stroke_cap ) return false;
  90         if ( a.stroke_join != b.stroke_join ) return false;
  91     if ( (int)(a.stroke_miter_limit*100) != (int)(b.stroke_miter_limit*100) ) return false;
  92         if ( a.nbDash != b.nbDash ) return false;
  93         if ( a.nbDash <= 0 ) return true;
  94         if ( (int)floor(100*a.dash_offset) != (int)floor(100*b.dash_offset) ) return false;
  95         for (int i=0;i<a.nbDash;i++) {
  96                 if ( (int)floor(100*a.dashes[i]) != (int)floor(100*b.dashes[i]) ) return false;
  97         }
  98         return true;
  99 }
 100
 101 #ifndef USE_PANGO_WIN32
 102 /*
 103  * Outline extraction
 104  */
 105 typedef struct ft2_to_liv {
 106         Path*        theP;
 107         double       scale;
 108         Geom::Point    last;
 109 } ft2_to_liv;
 110
 111 // Note: Freetype 2.2.1 redefined function signatures for functions to be placed in an
 112 // FT_Outline_Funcs structure.  This is needed to keep backwards compatibility with the
 113 // 2.1.x series.
 114
 115 /* *** BEGIN #if HACK *** */
 116 #if FREETYPE_MAJOR == 2 && FREETYPE_MINOR >= 2
 117 typedef FT_Vector const FREETYPE_VECTOR;
 118 #else
 119 typedef FT_Vector FREETYPE_VECTOR;
 120 #endif
 121
 122 // outline as returned by freetype -> livarot Path
 123 // see nr-type-ft2.cpp for the freetype -> artBPath on which this code is based
 124 static int ft2_move_to(FREETYPE_VECTOR *to, void * i_user) {
 125         ft2_to_liv* user=(ft2_to_liv*)i_user;
 126         Geom::Point   p(user->scale*to->x,user->scale*to->y);
 127         //      printf("m  t=%f %f\n",p[0],p[1]);
 128         user->theP->MoveTo(p);
 129         user->last=p;
 130         return 0;
 131 }
 132
 133 static int ft2_line_to(FREETYPE_VECTOR *to, void *i_user)
 134 {
 135         ft2_to_liv* user=(ft2_to_liv*)i_user;
 136         Geom::Point   p(user->scale*to->x,user->scale*to->y);
 137         //      printf("l  t=%f %f\n",p[0],p[1]);
 138         user->theP->LineTo(p);
 139         user->last=p;
 140         return 0;
 141 }
 142
 143 static int ft2_conic_to(FREETYPE_VECTOR *control, FREETYPE_VECTOR *to, void *i_user)
 144 {
 145         ft2_to_liv* user=(ft2_to_liv*)i_user;
 146         Geom::Point   p(user->scale*to->x,user->scale*to->y),c(user->scale*control->x,user->scale*control->y);
 147         //      printf("b c=%f %f  t=%f %f\n",c[0],c[1],p[0],p[1]);
 148         user->theP->BezierTo(p);
 149         user->theP->IntermBezierTo(c);
 150         user->theP->EndBezierTo();
 151         user->last=p;
 152         return 0;
 153 }
 154
 155 static int ft2_cubic_to(FREETYPE_VECTOR *control1, FREETYPE_VECTOR *control2, FREETYPE_VECTOR *to, void *i_user)
 156 {
 157         ft2_to_liv* user=(ft2_to_liv*)i_user;
 158         Geom::Point   p(user->scale*to->x,user->scale*to->y),
 159         c1(user->scale*control1->x,user->scale*control1->y),
 160         c2(user->scale*control2->x,user->scale*control2->y);
 161         //      printf("c c1=%f %f  c2=%f %f   t=%f %f\n",c1[0],c1[1],c2[0],c2[1],p[0],p[1]);
 162         user->theP->CubicTo(p,3*(c1-user->last),3*(p-c2));
 163         user->last=p;
 164         return 0;
 165 }
 166 #endif
 167
 168 /* *** END #if HACK *** */
 169
 170 /*
 171  *
 172  */
 173
 174 font_instance::font_instance(void) :
 175     pFont(0),
 176     descr(0),
 177     refCount(0),
 178     daddy(0),
 179     nbGlyph(0),
 180     maxGlyph(0),
 181     glyphs(0),
 182     loadedPtr(new StyleMap()),
 183     theFace(0)
 184 {
 185     //printf("font instance born\n");
 186 }
 187
 188 font_instance::~font_instance(void)
 189 {
 190     if ( loadedPtr ) {
 191         StyleMap* tmp = static_cast<StyleMap*>(loadedPtr);
 192         delete tmp;
 193         loadedPtr = 0;
 194     }
 195
 196     if ( daddy ) {
 197         daddy->UnrefFace(this);
 198         daddy = 0;
 199     }
 200
 201     //printf("font instance death\n");
 202     if ( pFont ) {
 203         g_object_unref(pFont);
 204         pFont = 0;
 205     }
 206
 207     if ( descr ) {
 208         pango_font_description_free(descr);
 209         descr = 0;
 210     }
 211
 212     //  if ( theFace ) FT_Done_Face(theFace); // owned by pFont. don't touch
 213     theFace = 0;
 214
 215     for (int i=0;i<nbGlyph;i++) {
 216         if ( glyphs[i].outline ) {
 217             delete glyphs[i].outline;
 218         }
 219         if ( glyphs[i].pathvector ) {
 220             delete glyphs[i].pathvector;
 221         }
 222     }
 223     if ( glyphs ) {
 224         free(glyphs);
 225         glyphs = 0;
 226     }
 227     nbGlyph = 0;
 228     maxGlyph = 0;
 229 }
 230
 231 void font_instance::Ref(void)
 232 {
 233         refCount++;
 234         //char *tc=pango_font_description_to_string(descr);
 235         //printf("font %x %s ref'd %i\n",this,tc,refCount);
 236         //free(tc);
 237 }
 238
 239 void font_instance::Unref(void)
 240 {
 241         refCount--;
 242         //char *tc=pango_font_description_to_string(descr);
 243         //printf("font %x %s unref'd %i\n",this,tc,refCount);
 244         //free(tc);
 245         if ( refCount <= 0 ) {
 246                 if ( daddy ) daddy->UnrefFace(this);
 247                 daddy=NULL;
 248                 delete this;
 249         }
 250 }
 251
 252 unsigned int font_instance::Name(gchar *str, unsigned int size)
 253 {
 254         return Attribute("name", str, size);
 255 }
 256
 257 unsigned int font_instance::Family(gchar *str, unsigned int size)
 258 {
 259         return Attribute("family", str, size);
 260 }
 261
 262 unsigned int font_instance::PSName(gchar *str, unsigned int size)
 263 {
 264         return Attribute("psname", str, size);
 265 }
 266
 267 unsigned int font_instance::Attribute(const gchar *key, gchar *str, unsigned int size)
 268 {
 269         if ( descr == NULL ) {
 270                 if ( size > 0 ) str[0]=0;
 271                 return 0;
 272         }
 273         char*   res=NULL;
 274         bool    free_res=false;
 275
 276         if ( strcmp(key,"name") == 0 ) {
 277                 PangoFontDescription* td=pango_font_description_copy(descr);
 278                 pango_font_description_unset_fields (td, PANGO_FONT_MASK_SIZE);
 279                 res=pango_font_description_to_string (td);
 280                 pango_font_description_free(td);
 281                 free_res=true;
 282         } else if ( strcmp(key,"psname") == 0 ) {
 283 #ifndef USE_PANGO_WIN32
 284          res = (char *) FT_Get_Postscript_Name (theFace); // that's the main method, seems to always work
 285 #endif
 286          free_res=false;
 287          if (res == NULL) { // a very limited workaround, only bold, italic, and oblique will work
 288              PangoStyle style=pango_font_description_get_style(descr);
 289              bool i = (style == PANGO_STYLE_ITALIC);
 290              bool o = (style == PANGO_STYLE_OBLIQUE);
 291              PangoWeight weight=pango_font_description_get_weight(descr);
 292              bool b = (weight >= PANGO_WEIGHT_BOLD);
 293
 294              res = g_strdup_printf ("%s%s%s%s",
 295                                     pango_font_description_get_family(descr),
 296                                     (b || i || o) ? "-" : "",
 297                                     (b) ? "Bold" : "",
 298                                     (i) ? "Italic" : ((o) ? "Oblique" : "")  );
 299              free_res = true;
 300          }
 301         } else if ( strcmp(key,"family") == 0 ) {
 302                 res=(char*)pango_font_description_get_family(descr);
 303                 free_res=false;
 304         } else if ( strcmp(key,"style") == 0 ) {
 305                 PangoStyle v=pango_font_description_get_style(descr);
 306                 if ( v == PANGO_STYLE_ITALIC ) {
 307                         res=(char*)"italic";
 308                 } else if ( v == PANGO_STYLE_OBLIQUE ) {
 309                         res=(char*)"oblique";
 310                 } else {
 311                         res=(char*)"normal";
 312                 }
 313                 free_res=false;
 314         } else if ( strcmp(key,"weight") == 0 ) {
 315                 PangoWeight v=pango_font_description_get_weight(descr);
 316                 if ( v <= PANGO_WEIGHT_ULTRALIGHT ) {
 317                         res=(char*)"200";
 318                 } else if ( v <= PANGO_WEIGHT_LIGHT ) {
 319                         res=(char*)"300";
 320                 } else if ( v <= PANGO_WEIGHT_NORMAL ) {
 321                         res=(char*)"normal";
 322                 } else if ( v <= PANGO_WEIGHT_BOLD ) {
 323                         res=(char*)"bold";
 324                 } else if ( v <= PANGO_WEIGHT_ULTRABOLD ) {
 325                     res=(char*)"800";
 326                 } else { // HEAVY
 327                         res=(char*)"900";
 328                 }
 329                 free_res=false;
 330         } else if ( strcmp(key,"stretch") == 0 ) {
 331                 PangoStretch v=pango_font_description_get_stretch(descr);
 332                 if ( v <= PANGO_STRETCH_EXTRA_CONDENSED ) {
 333                         res=(char*)"extra-condensed";
 334                 } else if ( v <= PANGO_STRETCH_CONDENSED ) {
 335                         res=(char*)"condensed";
 336                 } else if ( v <= PANGO_STRETCH_SEMI_CONDENSED ) {
 337                         res=(char*)"semi-condensed";
 338                 } else if ( v <= PANGO_STRETCH_NORMAL ) {
 339                         res=(char*)"normal";
 340                 } else if ( v <= PANGO_STRETCH_SEMI_EXPANDED ) {
 341                         res=(char*)"semi-expanded";
 342                 } else if ( v <= PANGO_STRETCH_EXPANDED ) {
 343                         res=(char*)"expanded";
 344                 } else {
 345                         res=(char*)"extra-expanded";
 346                 }
 347                 free_res=false;
 348         } else if ( strcmp(key,"variant") == 0 ) {
 349                 PangoVariant v=pango_font_description_get_variant(descr);
 350                 if ( v == PANGO_VARIANT_SMALL_CAPS ) {
 351                         res=(char*)"small-caps";
 352                 } else {
 353                         res=(char*)"normal";
 354                 }
 355                 free_res=false;
 356         } else {
 357                 res = NULL;
 358                 free_res=false;
 359         }
 360         if ( res == NULL ) {
 361                 if ( size > 0 ) str[0]=0;
 362                 return 0;
 363         }
 364
 365         if (res) {
 366                 unsigned int len=strlen(res);
 367                 unsigned int rlen=(size-1<len)?size-1:len;
 368                 if ( str ) {
 369                         if ( rlen > 0 ) memcpy(str,res,rlen);
 370                         if ( size > 0 ) str[rlen]=0;
 371                 }
 372                 if (free_res) free(res);
 373                 return len;
 374         }
 375         return 0;
 376 }
 377
 378 void font_instance::InitTheFace()
 379 {
 380 #ifdef USE_PANGO_WIN32
 381     if ( !theFace ) {
 382         LOGFONT *lf=pango_win32_font_logfont(pFont);
 383         g_assert(lf != NULL);
 384         theFace=pango_win32_font_cache_load(daddy->pangoFontCache,lf);
 385         g_free(lf);
 386     }
 387     XFORM identity = {1.0, 0.0, 0.0, 1.0, 0.0, 0.0};
 388     SetWorldTransform(daddy->hScreenDC, &identity);
 389     SetGraphicsMode(daddy->hScreenDC, GM_COMPATIBLE);
 390     SelectObject(daddy->hScreenDC,theFace);
 391 #else
 392         theFace=pango_ft2_font_get_face(pFont);
 393     if ( theFace )
 394         FT_Select_Charmap(theFace,ft_encoding_unicode) && FT_Select_Charmap(theFace,ft_encoding_symbol);
 395 #endif
 396 }
 397
 398 void font_instance::FreeTheFace()
 399 {
 400 #ifdef USE_PANGO_WIN32
 401     SelectObject(daddy->hScreenDC,GetStockObject(SYSTEM_FONT));
 402     pango_win32_font_cache_unload(daddy->pangoFontCache,theFace);
 403 #endif
 404     theFace=NULL;
 405 }
 406
 407 void font_instance::InstallFace(PangoFont* iFace)
 408 {
 409         if ( !iFace )
 410             return;
 411         pFont=iFace;
 412
 413     InitTheFace();
 414
 415         if ( pFont && IsOutlineFont() == false ) {
 416         FreeTheFace();
 417                 if ( pFont ) g_object_unref(pFont);
 418                 pFont=NULL;
 419         }
 420 }
 421
 422 bool    font_instance::IsOutlineFont(void)
 423 {
 424         if ( pFont == NULL ) return false;
 425     InitTheFace();
 426 #ifdef USE_PANGO_WIN32
 427     TEXTMETRIC tm;
 428     return GetTextMetrics(daddy->hScreenDC,&tm) && tm.tmPitchAndFamily&(TMPF_TRUETYPE|TMPF_DEVICE);
 429 #else
 430         return FT_IS_SCALABLE(theFace);
 431 #endif
 432 }
 433
 434 int font_instance::MapUnicodeChar(gunichar c)
 435 {
 436         if ( pFont == NULL ) return 0;
 437 #ifdef USE_PANGO_WIN32
 438     return pango_win32_font_get_glyph_index(pFont,c);
 439 #else
 440         int res=0;
 441         theFace=pango_ft2_font_get_face(pFont);
 442         if ( c > 0xf0000 ) {
 443                 res=CLAMP(c,0xf0000,0x1fffff)-0xf0000;
 444         } else {
 445                 res=FT_Get_Char_Index(theFace, c);
 446         }
 447         return res;
 448 #endif
 449 }
 450
 451
 452 #ifdef USE_PANGO_WIN32
 453 static inline Geom::Point pointfx_to_nrpoint(const POINTFX &p, double scale)
 454 {
 455     return Geom::Point(*(long*)&p.x / 65536.0 * scale,
 456                      *(long*)&p.y / 65536.0 * scale);
 457 }
 458 #endif
 459
 460 void font_instance::LoadGlyph(int glyph_id)
 461 {
 462         if ( pFont == NULL ) return;
 463     InitTheFace();
 464 #ifndef USE_PANGO_WIN32
 465         if ( !FT_IS_SCALABLE(theFace) ) return; // bitmap font
 466 #endif
 467
 468         if ( id_to_no.find(glyph_id) == id_to_no.end() ) {
 469                 if ( nbGlyph >= maxGlyph ) {
 470                         maxGlyph=2*nbGlyph+1;
 471                         glyphs=(font_glyph*)realloc(glyphs,maxGlyph*sizeof(font_glyph));
 472                 }
 473                 font_glyph  n_g;
 474                 n_g.outline=NULL;
 475         n_g.pathvector=NULL;
 476                 n_g.bbox[0]=n_g.bbox[1]=n_g.bbox[2]=n_g.bbox[3]=0;
 477                 bool   doAdd=false;
 478
 479 #ifdef USE_PANGO_WIN32
 480
 481 #ifndef GGO_UNHINTED         // For compatibility with old SDKs.
 482 #define GGO_UNHINTED 0x0100
 483 #endif
 484
 485         MAT2 identity = {{0,1},{0,0},{0,0},{0,1}};
 486         OUTLINETEXTMETRIC otm;
 487         GetOutlineTextMetrics(daddy->hScreenDC, sizeof(otm), &otm);
 488         GLYPHMETRICS metrics;
 489         DWORD bufferSize=GetGlyphOutline (daddy->hScreenDC, glyph_id, GGO_GLYPH_INDEX | GGO_NATIVE | GGO_UNHINTED, &metrics, 0, NULL, &identity);
 490         double scale=1.0/daddy->fontSize;
 491         n_g.h_advance=metrics.gmCellIncX*scale;
 492         n_g.v_advance=otm.otmTextMetrics.tmHeight*scale;
 493         n_g.h_width=metrics.gmBlackBoxX*scale;
 494         n_g.v_width=metrics.gmBlackBoxY*scale;
 495         n_g.outline=NULL;
 496         if ( bufferSize == GDI_ERROR) {
 497             // shit happened
 498         } else if ( bufferSize == 0) {
 499             // character has no visual representation, but is valid (eg whitespace)
 500             doAdd=true;
 501         } else {
 502             std::auto_ptr<char> buffer(new char[bufferSize]);
 503             if ( GetGlyphOutline (daddy->hScreenDC, glyph_id, GGO_GLYPH_INDEX | GGO_NATIVE | GGO_UNHINTED, &metrics, bufferSize, buffer.get(), &identity) <= 0 ) {
 504                 // shit happened
 505             } else {
 506                 // Platform SDK is rubbish, read KB87115 instead
 507                 n_g.outline=new Path;
 508                 DWORD polyOffset=0;
 509                 while ( polyOffset < bufferSize ) {
 510                     TTPOLYGONHEADER const *polyHeader=(TTPOLYGONHEADER const *)(buffer.get()+polyOffset);
 511                     if (polyOffset+polyHeader->cb > bufferSize) break;
 512
 513                     if (polyHeader->dwType == TT_POLYGON_TYPE) {
 514                         n_g.outline->MoveTo(pointfx_to_nrpoint(polyHeader->pfxStart, scale));
 515                         DWORD curveOffset=polyOffset+sizeof(TTPOLYGONHEADER);
 516
 517                         while ( curveOffset < polyOffset+polyHeader->cb ) {
 518                             TTPOLYCURVE const *polyCurve=(TTPOLYCURVE const *)(buffer.get()+curveOffset);
 519                             POINTFX const *p=polyCurve->apfx;
 520                             POINTFX const *endp=p+polyCurve->cpfx;
 521
 522                             switch (polyCurve->wType) {
 523                                 case TT_PRIM_LINE:
 524                                     while ( p != endp )
 525                                         n_g.outline->LineTo(pointfx_to_nrpoint(*p++, scale));
 526                                     break;
 527
 528                                 case TT_PRIM_QSPLINE:
 529                                 {
 530                                     g_assert(polyCurve->cpfx >= 2);
 531                                     endp -= 2;
 532                                     Geom::Point this_mid=pointfx_to_nrpoint(p[0], scale);
 533                                     while ( p != endp ) {
 534                                         Geom::Point next_mid=pointfx_to_nrpoint(p[1], scale);
 535                                             n_g.outline->BezierTo((next_mid+this_mid)/2);
 536                                             n_g.outline->IntermBezierTo(this_mid);
 537                                             n_g.outline->EndBezierTo();
 538                                         ++p;
 539                                         this_mid=next_mid;
 540                                     }
 541                                         n_g.outline->BezierTo(pointfx_to_nrpoint(p[1], scale));
 542                                         n_g.outline->IntermBezierTo(this_mid);
 543                                         n_g.outline->EndBezierTo();
 544                                     break;
 545                                 }
 546
 547                                 case 3:  // TT_PRIM_CSPLINE
 548                                     g_assert(polyCurve->cpfx % 3 == 0);
 549                                     while ( p != endp ) {
 550                                         n_g.outline->CubicTo(pointfx_to_nrpoint(p[2], scale), pointfx_to_nrpoint(p[0], scale), pointfx_to_nrpoint(p[1], scale));
 551                                         p += 3;
 552                                     }
 553                                     break;
 554                             }
 555                             curveOffset += sizeof(TTPOLYCURVE)+sizeof(POINTFX)*(polyCurve->cpfx-1);
 556                         }
 557                         n_g.outline->Close();
 558                     }
 559                     polyOffset += polyHeader->cb;
 560                 }
 561                 doAdd=true;
 562             }
 563         }
 564 #else
 565                 if (FT_Load_Glyph (theFace, glyph_id, FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING | FT_LOAD_NO_BITMAP)) {
 566                         // shit happened
 567                 } else {
 568                         if ( FT_HAS_HORIZONTAL(theFace) ) {
 569                                 n_g.h_advance=((double)theFace->glyph->metrics.horiAdvance)/((double)theFace->units_per_EM);
 570                                 n_g.h_width=((double)theFace->glyph->metrics.width)/((double)theFace->units_per_EM);
 571                         } else {
 572                                 n_g.h_width=n_g.h_advance=((double)(theFace->bbox.xMax-theFace->bbox.xMin))/((double)theFace->units_per_EM);
 573                         }
 574                         if ( FT_HAS_VERTICAL(theFace) ) {
 575                                 n_g.v_advance=((double)theFace->glyph->metrics.vertAdvance)/((double)theFace->units_per_EM);
 576                                 n_g.v_width=((double)theFace->glyph->metrics.height)/((double)theFace->units_per_EM);
 577                         } else {
 578                                 n_g.v_width=n_g.v_advance=((double)theFace->height)/((double)theFace->units_per_EM);
 579                         }
 580                         if ( theFace->glyph->format == ft_glyph_format_outline ) {
 581                                 FT_Outline_Funcs ft2_outline_funcs = {
 582                                         ft2_move_to,
 583                                         ft2_line_to,
 584                                         ft2_conic_to,
 585                                         ft2_cubic_to,
 586                                         0, 0
 587                                 };
 588                                 n_g.outline=new Path;
 589                                 ft2_to_liv   tData;
 590                                 tData.theP=n_g.outline;
 591                                 tData.scale=1.0/((double)theFace->units_per_EM);
 592                                 tData.last=Geom::Point(0,0);
 593                                 FT_Outline_Decompose (&theFace->glyph->outline, &ft2_outline_funcs, &tData);
 594                         }
 595                         doAdd=true;
 596                 }
 597 #endif
 598
 599                 if ( doAdd ) {
 600                         if ( n_g.outline ) {
 601                                 n_g.outline->FastBBox(n_g.bbox[0],n_g.bbox[1],n_g.bbox[2],n_g.bbox[3]);
 602                 n_g.pathvector=n_g.outline->MakePathVector();
 603                         }
 604                         glyphs[nbGlyph]=n_g;
 605                         id_to_no[glyph_id]=nbGlyph;
 606                         nbGlyph++;
 607                 }
 608     } else {
 609     }
 610 }
 611
 612 bool font_instance::FontMetrics(double &ascent,double &descent,double &leading)
 613 {
 614         if ( pFont == NULL ) return false;
 615     InitTheFace();
 616         if ( theFace == NULL ) return false;
 617 #ifdef USE_PANGO_WIN32
 618     OUTLINETEXTMETRIC otm;
 619     if ( !GetOutlineTextMetrics(daddy->hScreenDC,sizeof(otm),&otm) ) return false;
 620     double scale=1.0/daddy->fontSize;
 621     ascent=fabs(otm.otmAscent*scale);
 622     descent=fabs(otm.otmDescent*scale);
 623     leading=fabs(otm.otmLineGap*scale);
 624 #else
 625         if ( theFace->units_per_EM == 0 ) return false; // bitmap font
 626         ascent=fabs(((double)theFace->ascender)/((double)theFace->units_per_EM));
 627         descent=fabs(((double)theFace->descender)/((double)theFace->units_per_EM));
 628         leading=fabs(((double)theFace->height)/((double)theFace->units_per_EM));
 629         leading-=ascent+descent;
 630 #endif
 631         return true;
 632 }
 633
 634 bool font_instance::FontSlope(double &run, double &rise)
 635 {
 636     run = 0.0;
 637     rise = 1.0;
 638
 639         if ( pFont == NULL ) return false;
 640     InitTheFace();
 641         if ( theFace == NULL ) return false;
 642
 643 #ifdef USE_PANGO_WIN32
 644     OUTLINETEXTMETRIC otm;
 645     if ( !GetOutlineTextMetrics(daddy->hScreenDC,sizeof(otm),&otm) ) return false;
 646     run=otm.otmsCharSlopeRun;
 647     rise=otm.otmsCharSlopeRise;
 648 #else
 649         if ( !FT_IS_SCALABLE(theFace) ) return false; // bitmap font
 650
 651     TT_HoriHeader *hhea = (TT_HoriHeader*)FT_Get_Sfnt_Table(theFace, ft_sfnt_hhea);
 652     if (hhea == NULL) return false;
 653     run = hhea->caret_Slope_Run;
 654     rise = hhea->caret_Slope_Rise;
 655 #endif
 656         return true;
 657 }
 658
 659 Geom::OptRect font_instance::BBox(int glyph_id)
 660 {
 661         int no=-1;
 662         if ( id_to_no.find(glyph_id) == id_to_no.end() ) {
 663                 LoadGlyph(glyph_id);
 664                 if ( id_to_no.find(glyph_id) == id_to_no.end() ) {
 665                         // didn't load
 666                 } else {
 667                         no=id_to_no[glyph_id];
 668                 }
 669         } else {
 670                 no=id_to_no[glyph_id];
 671         }
 672         if ( no < 0 ) {
 673             return Geom::OptRect();
 674         } else {
 675             Geom::Point rmin(glyphs[no].bbox[0],glyphs[no].bbox[1]);
 676             Geom::Point rmax(glyphs[no].bbox[2],glyphs[no].bbox[3]);
 677             return Geom::Rect(rmin, rmax);
 678         }
 679 }
 680
 681 Path* font_instance::Outline(int glyph_id,Path* copyInto)
 682 {
 683         int no=-1;
 684         if ( id_to_no.find(glyph_id) == id_to_no.end() ) {
 685                 LoadGlyph(glyph_id);
 686                 if ( id_to_no.find(glyph_id) == id_to_no.end() ) {
 687                         // didn't load
 688                 } else {
 689                         no=id_to_no[glyph_id];
 690                 }
 691         } else {
 692                 no=id_to_no[glyph_id];
 693         }
 694         if ( no < 0 ) return NULL;
 695         Path*    src_o=glyphs[no].outline;
 696         if ( copyInto ) {
 697                 copyInto->Reset();
 698                 copyInto->Copy(src_o);
 699                 return copyInto;
 700         }
 701         return src_o;
 702 }
 703
 704 Geom::PathVector* font_instance::PathVector(int glyph_id)
 705 {
 706     int no = -1;
 707     if ( id_to_no.find(glyph_id) == id_to_no.end() ) {
 708         LoadGlyph(glyph_id);
 709         if ( id_to_no.find(glyph_id) == id_to_no.end() ) {
 710             // didn't load
 711         } else {
 712             no = id_to_no[glyph_id];
 713         }
 714     } else {
 715         no = id_to_no[glyph_id];
 716     }
 717     if ( no < 0 ) return NULL;
 718     return glyphs[no].pathvector;
 719 }
 720
 721 double font_instance::Advance(int glyph_id,bool vertical)
 722 {
 723         int no=-1;
 724         if ( id_to_no.find(glyph_id) == id_to_no.end() ) {
 725                 LoadGlyph(glyph_id);
 726                 if ( id_to_no.find(glyph_id) == id_to_no.end() ) {
 727                         // didn't load
 728                 } else {
 729                         no=id_to_no[glyph_id];
 730                 }
 731         } else {
 732                 no=id_to_no[glyph_id];
 733         }
 734         if ( no >= 0 ) {
 735                 if ( vertical ) {
 736                         return glyphs[no].v_advance;
 737                 } else {
 738                         return glyphs[no].h_advance;
 739                 }
 740         }
 741         return 0;
 742 }
 743
 744
 745 raster_font* font_instance::RasterFont(const Geom::Matrix &trs, double stroke_width, bool vertical, JoinType stroke_join, ButtType stroke_cap, float /*miter_limit*/)
 746 {
 747         font_style  nStyle;
 748         nStyle.transform=trs;
 749         nStyle.vertical=vertical;
 750         nStyle.stroke_width=stroke_width;
 751         nStyle.stroke_cap=stroke_cap;
 752         nStyle.stroke_join=stroke_join;
 753         nStyle.nbDash=0;
 754         nStyle.dash_offset=0;
 755         nStyle.dashes=NULL;
 756         return RasterFont(nStyle);
 757 }
 758
 759 raster_font* font_instance::RasterFont(const font_style &inStyle)
 760 {
 761         raster_font  *res=NULL;
 762         double *savDashes=NULL;
 763         font_style nStyle=inStyle;
 764     // for some evil reason font_style doesn't have a copy ctor, so the
 765     // stuff that should be done there is done here instead (because the
 766     // raster_font ctor copies nStyle).
 767         if ( nStyle.stroke_width > 0 && nStyle.nbDash > 0 && nStyle.dashes ) {
 768                 savDashes=nStyle.dashes;
 769                 nStyle.dashes=(double*)malloc(nStyle.nbDash*sizeof(double));
 770                 memcpy(nStyle.dashes,savDashes,nStyle.nbDash*sizeof(double));
 771         }
 772         StyleMap& loadedStyles = *static_cast<StyleMap*>(loadedPtr);
 773         if ( loadedStyles.find(nStyle) == loadedStyles.end() ) {
 774                 raster_font *nR = new raster_font(nStyle);
 775                 nR->Ref();
 776                 nR->daddy=this;
 777                 loadedStyles[nStyle]=nR;
 778                 res=nR;
 779                 if ( res ) Ref();
 780         } else {
 781                 res=loadedStyles[nStyle];
 782                 res->Ref();
 783                 if ( nStyle.dashes ) free(nStyle.dashes); // since they're not taken by a new rasterfont
 784         }
 785         nStyle.dashes=savDashes;
 786         return res;
 787 }
 788
 789 void font_instance::RemoveRasterFont(raster_font* who)
 790 {
 791     if ( who ) {
 792         StyleMap& loadedStyles = *static_cast<StyleMap*>(loadedPtr);
 793         if ( loadedStyles.find(who->style) == loadedStyles.end() ) {
 794             //g_print("RemoveRasterFont failed \n");
 795             // not found
 796         } else {
 797             loadedStyles.erase(loadedStyles.find(who->style));
 798             //g_print("RemoveRasterFont\n");
 799             Unref();
 800         }
 801     }
 802 }
 803
 804
 805
 806 /*
 807  Local Variables:
 808  mode:c++
 809  c-file-style:"stroustrup"
 810  c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
 811  indent-tabs-mode:nil
 812  fill-column:99
 813  End:
 814  */
 815 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :