1 /*
2 * FontInstance.cpp
3 * testICU
4 *
5 * Authors:
6 * fred
7 * bulia byak <buliabyak@users.sf.net>
8 *
9 */
11 #define PANGO_ENABLE_ENGINE
13 #ifdef HAVE_CONFIG_H
14 # include "config.h"
15 #endif
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"
32 struct font_style_hash : public std::unary_function<font_style, size_t> {
33 size_t operator()(font_style const &x) const;
34 };
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 };
40 typedef INK_UNORDERED_MAP<font_style, raster_font*, font_style_hash, font_style_equal> StyleMap;
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 }
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;
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 }
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;
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.
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
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 }
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 }
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 }
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
162 /* *** END #if HACK *** */
164 /*
165 *
166 */
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 }
182 font_instance::~font_instance(void)
183 {
184 if ( loadedPtr ) {
185 StyleMap* tmp = static_cast<StyleMap*>(loadedPtr);
186 delete tmp;
187 loadedPtr = 0;
188 }
190 if ( daddy ) {
191 daddy->UnrefFace(this);
192 daddy = 0;
193 }
195 //printf("font instance death\n");
196 if ( pFont ) {
197 g_object_unref(pFont);
198 pFont = 0;
199 }
201 if ( descr ) {
202 pango_font_description_free(descr);
203 descr = 0;
204 }
206 // if ( theFace ) FT_Done_Face(theFace); // owned by pFont. don't touch
207 theFace = 0;
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 }
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 }
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 }
246 unsigned int font_instance::Name(gchar *str, unsigned int size)
247 {
248 return Attribute("name", str, size);
249 }
251 unsigned int font_instance::Family(gchar *str, unsigned int size)
252 {
253 return Attribute("family", str, size);
254 }
256 unsigned int font_instance::PSName(gchar *str, unsigned int size)
257 {
258 return Attribute("psname", str, size);
259 }
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;
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);
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_THIN ) {
311 res=(char*)"100";
312 } else if ( v <= PANGO_WEIGHT_ULTRALIGHT ) {
313 res=(char*)"200";
314 } else if ( v <= PANGO_WEIGHT_LIGHT ) {
315 res=(char*)"300";
316 } else if ( v <= PANGO_WEIGHT_BOOK ) {
317 res=(char*)"380";
318 } else if ( v <= PANGO_WEIGHT_NORMAL ) {
319 res=(char*)"normal";
320 } else if ( v <= PANGO_WEIGHT_MEDIUM ) {
321 res=(char*)"500";
322 } else if ( v <= PANGO_WEIGHT_SEMIBOLD ) {
323 res=(char*)"600";
324 } else if ( v <= PANGO_WEIGHT_BOLD ) {
325 res=(char*)"bold";
326 } else if ( v <= PANGO_WEIGHT_ULTRABOLD ) {
327 res=(char*)"800";
328 } else { // HEAVY NB: Pango defines ULTRAHEAVY = 1000 but not CSS2
329 res=(char*)"900";
330 }
331 free_res=false;
332 } else if ( strcmp(key,"stretch") == 0 ) {
333 PangoStretch v=pango_font_description_get_stretch(descr);
334 if ( v <= PANGO_STRETCH_EXTRA_CONDENSED ) {
335 res=(char*)"extra-condensed";
336 } else if ( v <= PANGO_STRETCH_CONDENSED ) {
337 res=(char*)"condensed";
338 } else if ( v <= PANGO_STRETCH_SEMI_CONDENSED ) {
339 res=(char*)"semi-condensed";
340 } else if ( v <= PANGO_STRETCH_NORMAL ) {
341 res=(char*)"normal";
342 } else if ( v <= PANGO_STRETCH_SEMI_EXPANDED ) {
343 res=(char*)"semi-expanded";
344 } else if ( v <= PANGO_STRETCH_EXPANDED ) {
345 res=(char*)"expanded";
346 } else {
347 res=(char*)"extra-expanded";
348 }
349 free_res=false;
350 } else if ( strcmp(key,"variant") == 0 ) {
351 PangoVariant v=pango_font_description_get_variant(descr);
352 if ( v == PANGO_VARIANT_SMALL_CAPS ) {
353 res=(char*)"small-caps";
354 } else {
355 res=(char*)"normal";
356 }
357 free_res=false;
358 } else {
359 res = NULL;
360 free_res=false;
361 }
362 if ( res == NULL ) {
363 if ( size > 0 ) str[0]=0;
364 return 0;
365 }
367 if (res) {
368 unsigned int len=strlen(res);
369 unsigned int rlen=(size-1<len)?size-1:len;
370 if ( str ) {
371 if ( rlen > 0 ) memcpy(str,res,rlen);
372 if ( size > 0 ) str[rlen]=0;
373 }
374 if (free_res) free(res);
375 return len;
376 }
377 return 0;
378 }
380 void font_instance::InitTheFace()
381 {
382 #ifdef USE_PANGO_WIN32
383 if ( !theFace ) {
384 LOGFONT *lf=pango_win32_font_logfont(pFont);
385 g_assert(lf != NULL);
386 theFace=pango_win32_font_cache_load(daddy->pangoFontCache,lf);
387 g_free(lf);
388 }
389 XFORM identity = {1.0, 0.0, 0.0, 1.0, 0.0, 0.0};
390 SetWorldTransform(daddy->hScreenDC, &identity);
391 SetGraphicsMode(daddy->hScreenDC, GM_COMPATIBLE);
392 SelectObject(daddy->hScreenDC,theFace);
393 #else
394 theFace=pango_ft2_font_get_face(pFont);
395 if ( theFace )
396 FT_Select_Charmap(theFace,ft_encoding_unicode) && FT_Select_Charmap(theFace,ft_encoding_symbol);
397 #endif
398 }
400 void font_instance::FreeTheFace()
401 {
402 #ifdef USE_PANGO_WIN32
403 SelectObject(daddy->hScreenDC,GetStockObject(SYSTEM_FONT));
404 pango_win32_font_cache_unload(daddy->pangoFontCache,theFace);
405 #endif
406 theFace=NULL;
407 }
409 void font_instance::InstallFace(PangoFont* iFace)
410 {
411 if ( !iFace )
412 return;
413 pFont=iFace;
415 InitTheFace();
417 if ( pFont && IsOutlineFont() == false ) {
418 FreeTheFace();
419 if ( pFont ) g_object_unref(pFont);
420 pFont=NULL;
421 }
422 }
424 bool font_instance::IsOutlineFont(void)
425 {
426 if ( pFont == NULL ) return false;
427 InitTheFace();
428 #ifdef USE_PANGO_WIN32
429 TEXTMETRIC tm;
430 return GetTextMetrics(daddy->hScreenDC,&tm) && tm.tmPitchAndFamily&(TMPF_TRUETYPE|TMPF_DEVICE);
431 #else
432 return FT_IS_SCALABLE(theFace);
433 #endif
434 }
436 int font_instance::MapUnicodeChar(gunichar c)
437 {
438 if ( pFont == NULL ) return 0;
439 #ifdef USE_PANGO_WIN32
440 return pango_win32_font_get_glyph_index(pFont,c);
441 #else
442 int res=0;
443 theFace=pango_ft2_font_get_face(pFont);
444 if ( c > 0xf0000 ) {
445 res=CLAMP(c,0xf0000,0x1fffff)-0xf0000;
446 } else {
447 res=FT_Get_Char_Index(theFace, c);
448 }
449 return res;
450 #endif
451 }
454 #ifdef USE_PANGO_WIN32
455 static inline Geom::Point pointfx_to_nrpoint(const POINTFX &p, double scale)
456 {
457 return Geom::Point(*(long*)&p.x / 65536.0 * scale,
458 *(long*)&p.y / 65536.0 * scale);
459 }
460 #endif
462 void font_instance::LoadGlyph(int glyph_id)
463 {
464 if ( pFont == NULL ) return;
465 InitTheFace();
466 #ifndef USE_PANGO_WIN32
467 if ( !FT_IS_SCALABLE(theFace) ) return; // bitmap font
468 #endif
470 if ( id_to_no.find(glyph_id) == id_to_no.end() ) {
471 if ( nbGlyph >= maxGlyph ) {
472 maxGlyph=2*nbGlyph+1;
473 glyphs=(font_glyph*)realloc(glyphs,maxGlyph*sizeof(font_glyph));
474 }
475 font_glyph n_g;
476 n_g.outline=NULL;
477 n_g.pathvector=NULL;
478 n_g.bbox[0]=n_g.bbox[1]=n_g.bbox[2]=n_g.bbox[3]=0;
479 bool doAdd=false;
481 #ifdef USE_PANGO_WIN32
483 #ifndef GGO_UNHINTED // For compatibility with old SDKs.
484 #define GGO_UNHINTED 0x0100
485 #endif
487 MAT2 identity = {{0,1},{0,0},{0,0},{0,1}};
488 OUTLINETEXTMETRIC otm;
489 GetOutlineTextMetrics(daddy->hScreenDC, sizeof(otm), &otm);
490 GLYPHMETRICS metrics;
491 DWORD bufferSize=GetGlyphOutline (daddy->hScreenDC, glyph_id, GGO_GLYPH_INDEX | GGO_NATIVE | GGO_UNHINTED, &metrics, 0, NULL, &identity);
492 double scale=1.0/daddy->fontSize;
493 n_g.h_advance=metrics.gmCellIncX*scale;
494 n_g.v_advance=otm.otmTextMetrics.tmHeight*scale;
495 n_g.h_width=metrics.gmBlackBoxX*scale;
496 n_g.v_width=metrics.gmBlackBoxY*scale;
497 n_g.outline=NULL;
498 if ( bufferSize == GDI_ERROR) {
499 // shit happened
500 } else if ( bufferSize == 0) {
501 // character has no visual representation, but is valid (eg whitespace)
502 doAdd=true;
503 } else {
504 char *buffer = new char[bufferSize];
505 if ( GetGlyphOutline (daddy->hScreenDC, glyph_id, GGO_GLYPH_INDEX | GGO_NATIVE | GGO_UNHINTED, &metrics, bufferSize, buffer, &identity) <= 0 ) {
506 // shit happened
507 } else {
508 // Platform SDK is rubbish, read KB87115 instead
509 n_g.outline=new Path;
510 DWORD polyOffset=0;
511 while ( polyOffset < bufferSize ) {
512 TTPOLYGONHEADER const *polyHeader=(TTPOLYGONHEADER const *)(buffer+polyOffset);
513 if (polyOffset+polyHeader->cb > bufferSize) break;
515 if (polyHeader->dwType == TT_POLYGON_TYPE) {
516 n_g.outline->MoveTo(pointfx_to_nrpoint(polyHeader->pfxStart, scale));
517 DWORD curveOffset=polyOffset+sizeof(TTPOLYGONHEADER);
519 while ( curveOffset < polyOffset+polyHeader->cb ) {
520 TTPOLYCURVE const *polyCurve=(TTPOLYCURVE const *)(buffer+curveOffset);
521 POINTFX const *p=polyCurve->apfx;
522 POINTFX const *endp=p+polyCurve->cpfx;
524 switch (polyCurve->wType) {
525 case TT_PRIM_LINE:
526 while ( p != endp )
527 n_g.outline->LineTo(pointfx_to_nrpoint(*p++, scale));
528 break;
530 case TT_PRIM_QSPLINE:
531 {
532 g_assert(polyCurve->cpfx >= 2);
533 endp -= 2;
534 Geom::Point this_mid=pointfx_to_nrpoint(p[0], scale);
535 while ( p != endp ) {
536 Geom::Point next_mid=pointfx_to_nrpoint(p[1], scale);
537 n_g.outline->BezierTo((next_mid+this_mid)/2);
538 n_g.outline->IntermBezierTo(this_mid);
539 n_g.outline->EndBezierTo();
540 ++p;
541 this_mid=next_mid;
542 }
543 n_g.outline->BezierTo(pointfx_to_nrpoint(p[1], scale));
544 n_g.outline->IntermBezierTo(this_mid);
545 n_g.outline->EndBezierTo();
546 break;
547 }
549 case 3: // TT_PRIM_CSPLINE
550 g_assert(polyCurve->cpfx % 3 == 0);
551 while ( p != endp ) {
552 n_g.outline->CubicTo(pointfx_to_nrpoint(p[2], scale), pointfx_to_nrpoint(p[0], scale), pointfx_to_nrpoint(p[1], scale));
553 p += 3;
554 }
555 break;
556 }
557 curveOffset += sizeof(TTPOLYCURVE)+sizeof(POINTFX)*(polyCurve->cpfx-1);
558 }
559 n_g.outline->Close();
560 }
561 polyOffset += polyHeader->cb;
562 }
563 doAdd=true;
564 }
565 delete [] buffer;
566 }
567 #else
568 if (FT_Load_Glyph (theFace, glyph_id, FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING | FT_LOAD_NO_BITMAP)) {
569 // shit happened
570 } else {
571 if ( FT_HAS_HORIZONTAL(theFace) ) {
572 n_g.h_advance=((double)theFace->glyph->metrics.horiAdvance)/((double)theFace->units_per_EM);
573 n_g.h_width=((double)theFace->glyph->metrics.width)/((double)theFace->units_per_EM);
574 } else {
575 n_g.h_width=n_g.h_advance=((double)(theFace->bbox.xMax-theFace->bbox.xMin))/((double)theFace->units_per_EM);
576 }
577 if ( FT_HAS_VERTICAL(theFace) ) {
578 n_g.v_advance=((double)theFace->glyph->metrics.vertAdvance)/((double)theFace->units_per_EM);
579 n_g.v_width=((double)theFace->glyph->metrics.height)/((double)theFace->units_per_EM);
580 } else {
581 n_g.v_width=n_g.v_advance=((double)theFace->height)/((double)theFace->units_per_EM);
582 }
583 if ( theFace->glyph->format == ft_glyph_format_outline ) {
584 FT_Outline_Funcs ft2_outline_funcs = {
585 ft2_move_to,
586 ft2_line_to,
587 ft2_conic_to,
588 ft2_cubic_to,
589 0, 0
590 };
591 n_g.outline=new Path;
592 ft2_to_liv tData;
593 tData.theP=n_g.outline;
594 tData.scale=1.0/((double)theFace->units_per_EM);
595 tData.last=Geom::Point(0,0);
596 FT_Outline_Decompose (&theFace->glyph->outline, &ft2_outline_funcs, &tData);
597 }
598 doAdd=true;
599 }
600 #endif
602 if ( doAdd ) {
603 if ( n_g.outline ) {
604 n_g.outline->FastBBox(n_g.bbox[0],n_g.bbox[1],n_g.bbox[2],n_g.bbox[3]);
605 n_g.pathvector=n_g.outline->MakePathVector();
606 }
607 glyphs[nbGlyph]=n_g;
608 id_to_no[glyph_id]=nbGlyph;
609 nbGlyph++;
610 }
611 } else {
612 }
613 }
615 bool font_instance::FontMetrics(double &ascent,double &descent,double &leading)
616 {
617 if ( pFont == NULL ) return false;
618 InitTheFace();
619 if ( theFace == NULL ) return false;
620 #ifdef USE_PANGO_WIN32
621 OUTLINETEXTMETRIC otm;
622 if ( !GetOutlineTextMetrics(daddy->hScreenDC,sizeof(otm),&otm) ) return false;
623 double scale=1.0/daddy->fontSize;
624 ascent=fabs(otm.otmAscent*scale);
625 descent=fabs(otm.otmDescent*scale);
626 leading=fabs(otm.otmLineGap*scale);
627 #else
628 if ( theFace->units_per_EM == 0 ) return false; // bitmap font
629 ascent=fabs(((double)theFace->ascender)/((double)theFace->units_per_EM));
630 descent=fabs(((double)theFace->descender)/((double)theFace->units_per_EM));
631 leading=fabs(((double)theFace->height)/((double)theFace->units_per_EM));
632 leading-=ascent+descent;
633 #endif
634 return true;
635 }
637 bool font_instance::FontSlope(double &run, double &rise)
638 {
639 run = 0.0;
640 rise = 1.0;
642 if ( pFont == NULL ) return false;
643 InitTheFace();
644 if ( theFace == NULL ) return false;
646 #ifdef USE_PANGO_WIN32
647 OUTLINETEXTMETRIC otm;
648 if ( !GetOutlineTextMetrics(daddy->hScreenDC,sizeof(otm),&otm) ) return false;
649 run=otm.otmsCharSlopeRun;
650 rise=otm.otmsCharSlopeRise;
651 #else
652 if ( !FT_IS_SCALABLE(theFace) ) return false; // bitmap font
654 TT_HoriHeader *hhea = (TT_HoriHeader*)FT_Get_Sfnt_Table(theFace, ft_sfnt_hhea);
655 if (hhea == NULL) return false;
656 run = hhea->caret_Slope_Run;
657 rise = hhea->caret_Slope_Rise;
658 #endif
659 return true;
660 }
662 Geom::OptRect font_instance::BBox(int glyph_id)
663 {
664 int no=-1;
665 if ( id_to_no.find(glyph_id) == id_to_no.end() ) {
666 LoadGlyph(glyph_id);
667 if ( id_to_no.find(glyph_id) == id_to_no.end() ) {
668 // didn't load
669 } else {
670 no=id_to_no[glyph_id];
671 }
672 } else {
673 no=id_to_no[glyph_id];
674 }
675 if ( no < 0 ) {
676 return Geom::OptRect();
677 } else {
678 Geom::Point rmin(glyphs[no].bbox[0],glyphs[no].bbox[1]);
679 Geom::Point rmax(glyphs[no].bbox[2],glyphs[no].bbox[3]);
680 return Geom::Rect(rmin, rmax);
681 }
682 }
684 Path* font_instance::Outline(int glyph_id,Path* copyInto)
685 {
686 int no=-1;
687 if ( id_to_no.find(glyph_id) == id_to_no.end() ) {
688 LoadGlyph(glyph_id);
689 if ( id_to_no.find(glyph_id) == id_to_no.end() ) {
690 // didn't load
691 } else {
692 no=id_to_no[glyph_id];
693 }
694 } else {
695 no=id_to_no[glyph_id];
696 }
697 if ( no < 0 ) return NULL;
698 Path* src_o=glyphs[no].outline;
699 if ( copyInto ) {
700 copyInto->Reset();
701 copyInto->Copy(src_o);
702 return copyInto;
703 }
704 return src_o;
705 }
707 Geom::PathVector* font_instance::PathVector(int glyph_id)
708 {
709 int no = -1;
710 if ( id_to_no.find(glyph_id) == id_to_no.end() ) {
711 LoadGlyph(glyph_id);
712 if ( id_to_no.find(glyph_id) == id_to_no.end() ) {
713 // didn't load
714 } else {
715 no = id_to_no[glyph_id];
716 }
717 } else {
718 no = id_to_no[glyph_id];
719 }
720 if ( no < 0 ) return NULL;
721 return glyphs[no].pathvector;
722 }
724 double font_instance::Advance(int glyph_id,bool vertical)
725 {
726 int no=-1;
727 if ( id_to_no.find(glyph_id) == id_to_no.end() ) {
728 LoadGlyph(glyph_id);
729 if ( id_to_no.find(glyph_id) == id_to_no.end() ) {
730 // didn't load
731 } else {
732 no=id_to_no[glyph_id];
733 }
734 } else {
735 no=id_to_no[glyph_id];
736 }
737 if ( no >= 0 ) {
738 if ( vertical ) {
739 return glyphs[no].v_advance;
740 } else {
741 return glyphs[no].h_advance;
742 }
743 }
744 return 0;
745 }
748 raster_font* font_instance::RasterFont(const Geom::Matrix &trs, double stroke_width, bool vertical, JoinType stroke_join, ButtType stroke_cap, float /*miter_limit*/)
749 {
750 font_style nStyle;
751 nStyle.transform=trs;
752 nStyle.vertical=vertical;
753 nStyle.stroke_width=stroke_width;
754 nStyle.stroke_cap=stroke_cap;
755 nStyle.stroke_join=stroke_join;
756 nStyle.nbDash=0;
757 nStyle.dash_offset=0;
758 nStyle.dashes=NULL;
759 return RasterFont(nStyle);
760 }
762 raster_font* font_instance::RasterFont(const font_style &inStyle)
763 {
764 raster_font *res=NULL;
765 double *savDashes=NULL;
766 font_style nStyle=inStyle;
767 // for some evil reason font_style doesn't have a copy ctor, so the
768 // stuff that should be done there is done here instead (because the
769 // raster_font ctor copies nStyle).
770 if ( nStyle.stroke_width > 0 && nStyle.nbDash > 0 && nStyle.dashes ) {
771 savDashes=nStyle.dashes;
772 nStyle.dashes=(double*)malloc(nStyle.nbDash*sizeof(double));
773 memcpy(nStyle.dashes,savDashes,nStyle.nbDash*sizeof(double));
774 }
775 StyleMap& loadedStyles = *static_cast<StyleMap*>(loadedPtr);
776 if ( loadedStyles.find(nStyle) == loadedStyles.end() ) {
777 raster_font *nR = new raster_font(nStyle);
778 nR->Ref();
779 nR->daddy=this;
780 loadedStyles[nStyle]=nR;
781 res=nR;
782 if ( res ) Ref();
783 } else {
784 res=loadedStyles[nStyle];
785 res->Ref();
786 if ( nStyle.dashes ) free(nStyle.dashes); // since they're not taken by a new rasterfont
787 }
788 nStyle.dashes=savDashes;
789 return res;
790 }
792 void font_instance::RemoveRasterFont(raster_font* who)
793 {
794 if ( who ) {
795 StyleMap& loadedStyles = *static_cast<StyleMap*>(loadedPtr);
796 if ( loadedStyles.find(who->style) == loadedStyles.end() ) {
797 //g_print("RemoveRasterFont failed \n");
798 // not found
799 } else {
800 loadedStyles.erase(loadedStyles.find(who->style));
801 //g_print("RemoveRasterFont\n");
802 Unref();
803 }
804 }
805 }
809 /*
810 Local Variables:
811 mode:c++
812 c-file-style:"stroustrup"
813 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
814 indent-tabs-mode:nil
815 fill-column:99
816 End:
817 */
818 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4 :