src/libnrtype/FontInstance.cpp

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