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