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