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