3 Functions for loading external fonts.
5 Extension module for the rfxswf library.
6 Part of the swftools package.
8 Copyright (c) 2003, 2004 Matthias Kramm
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 2 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program; if not, write to the Free Software
22 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
26 #include <freetype/freetype.h>
27 #include <freetype/ftglyph.h>
28 #include <freetype/ftsnames.h>
29 #include <freetype/ttnameid.h>
30 #include <freetype/ftoutln.h>
33 #define FT_SUBPIXELS 64
35 static int ft_move_to(FT_Vector* _to, void* user)
37 drawer_t* draw = (drawer_t*)user;
39 to.x = _to->x*FT_SCALE/(float)FT_SUBPIXELS;
40 to.y = -_to->y*FT_SCALE/(float)FT_SUBPIXELS;
41 draw->moveTo(draw, &to);
44 static int ft_line_to(FT_Vector* _to, void* user)
46 drawer_t* draw = (drawer_t*)user;
48 to.x = _to->x*FT_SCALE/(float)FT_SUBPIXELS;
49 to.y = -_to->y*FT_SCALE/(float)FT_SUBPIXELS;
50 draw->lineTo(draw, &to);
53 static int ft_cubic_to(FT_Vector* _c1, FT_Vector* _c2, FT_Vector* _to, void* user)
55 drawer_t* draw = (drawer_t*)user;
57 to.x = _to->x*FT_SCALE/(float)FT_SUBPIXELS;
58 to.y = -_to->y*FT_SCALE/(float)FT_SUBPIXELS;
59 c1.x = _c1->x*FT_SCALE/(float)FT_SUBPIXELS;
60 c1.y = -_c1->y*FT_SCALE/(float)FT_SUBPIXELS;
61 c2.x = _c2->x*FT_SCALE/(float)FT_SUBPIXELS;
62 c2.y = -_c2->y*FT_SCALE/(float)FT_SUBPIXELS;
63 draw_cubicTo(draw, &c1, &c2, &to);
66 static int ft_conic_to(FT_Vector* _c, FT_Vector* _to, void* user)
68 drawer_t* draw = (drawer_t*)user;
70 to.x = _to->x*FT_SCALE/(float)FT_SUBPIXELS;
71 to.y = -_to->y*FT_SCALE/(float)FT_SUBPIXELS;
72 c.x = _c->x*FT_SCALE/(float)FT_SUBPIXELS;
73 c.y = -_c->y*FT_SCALE/(float)FT_SUBPIXELS;
74 draw_conicTo(draw, &c, &to);
77 static FT_Outline_Funcs outline_functions =
86 static FT_Library ftlibrary = 0;
88 SWFFONT* swf_LoadTrueTypeFont(char*filename)
101 if(FT_Init_FreeType(&ftlibrary)) {
102 fprintf(stderr, "Couldn't init freetype library!\n");
106 error = FT_New_Face(ftlibrary, filename, 0, &face);
108 fprintf(stderr, "Couldn't load file %s- not a TTF file?\n", filename);
111 if(face->num_glyphs <= 0)
114 font = malloc(sizeof(SWFFONT));
115 memset(font, 0, sizeof(SWFFONT));
118 font->layout = malloc(sizeof(SWFLAYOUT));
119 memset(font->layout, 0, sizeof(SWFLAYOUT));
120 font->layout->bounds = malloc(face->num_glyphs*sizeof(SRECT));
121 font->style = ((face->style_flags&FT_STYLE_FLAG_ITALIC)?FONT_STYLE_ITALIC:0)
122 |((face->style_flags&FT_STYLE_FLAG_BOLD)?FONT_STYLE_BOLD:0);
123 font->encoding = FONT_ENCODING_UNICODE;
124 font->glyph2ascii = malloc(face->num_glyphs*sizeof(U16));
125 memset(font->glyph2ascii, 0, face->num_glyphs*sizeof(U16));
127 font->glyph = malloc(face->num_glyphs*sizeof(SWFGLYPH));
128 memset(font->glyph, 0, face->num_glyphs*sizeof(SWFGLYPH));
129 if(FT_HAS_GLYPH_NAMES(face)) {
130 font->glyphnames = malloc(face->num_glyphs*sizeof(char*));
131 memset(font->glyphnames,0,face->num_glyphs*sizeof(char*));
134 font->layout->ascent = face->ascender*20/FT_SUBPIXELS; //face->bbox.xMin;
135 font->layout->descent = abs(face->descender)*20/FT_SUBPIXELS; //face->bbox.xMax;
136 font->layout->leading = abs(face->bbox.yMin - face->bbox.yMax); //-face->bbox.xMin*20/FT_SUBPIXELS;
137 font->layout->kerningcount = 0;
139 name = FT_Get_Postscript_Name(face);
141 font->name = (U8*)strdup(name);
143 /* // Map Glyphs to Unicode, version 1 (quick and dirty):
145 for(t=0;t<65536;t++) {
146 int index = FT_Get_Char_Index(face, t);
147 if(index>=0 && index<face->num_glyphs) {
148 if(font->glyph2ascii[index]<0)
149 font->glyph2ascii[index] = t;
153 // Map Glyphs to Unicode, version 2 (much nicer):
154 // (The third way would be the AGL algorithm, as proposed
155 // by Werner Lemberg on freetype@freetype.org)
157 charcode = FT_Get_First_Char(face, &gindex);
160 if(gindex >= 0 && gindex<face->num_glyphs) {
161 if(!font->glyph2ascii[gindex]) {
162 font->glyph2ascii[gindex] = charcode;
163 if(charcode + 1 > font->maxascii) {
164 font->maxascii = charcode + 1;
168 charcode = FT_Get_Next_Char(face, charcode, &gindex);
171 font->ascii2glyph = malloc(font->maxascii*sizeof(int));
173 for(t=0;t<font->maxascii;t++) {
174 int g = FT_Get_Char_Index(face, t);
175 if(!g || g>=face->num_glyphs)
177 font->ascii2glyph[t] = g;
179 if(!font->glyph2ascii[g]) {
180 font->glyph2ascii[g] = t;
187 glyph2glyph = (int*)malloc(face->num_glyphs*sizeof(int));
189 for(t=0; t < face->num_glyphs; t++) {
198 if(FT_HAS_GLYPH_NAMES(face)) {
199 error = FT_Get_Glyph_Name(face, t, name, 127);
200 if(!error && name[0] && !strstr(name, "notdef")) {
201 font->glyphnames[font->numchars] = strdup(name);
205 if(!font->glyph2ascii[t] && !hasname && skipunused) {
208 error = FT_Load_Glyph(face, t, FT_LOAD_NO_BITMAP|FT_LOAD_NO_SCALE);
210 error = FT_Get_Glyph(face->glyph, &glyph);
213 FT_Glyph_Get_CBox(glyph, ft_glyph_bbox_unscaled, &bbox);
214 bbox.yMin = -bbox.yMin;
215 bbox.yMax = -bbox.yMax;
216 if(bbox.xMax < bbox.xMin) {
218 bbox.xMax ^= bbox.xMin;
219 bbox.xMin ^= bbox.xMax;
220 bbox.xMax ^= bbox.xMin;
222 if(bbox.yMax < bbox.yMin) {
224 bbox.yMax ^= bbox.yMin;
225 bbox.yMin ^= bbox.yMax;
226 bbox.yMax ^= bbox.yMin;
229 swf_Shape01DrawerInit(&draw, 0);
231 //error = FT_Outline_Decompose(&face->glyph->outline, &outline_functions, &draw);
232 error = FT_Outline_Decompose(&face->glyph->outline, &outline_functions, &draw);
239 font->glyph[font->numchars].advance = (bbox.xMax*FT_SCALE)/FT_SUBPIXELS;
241 font->glyph[font->numchars].advance = ((bbox.xMax - bbox.xMin)*FT_SCALE)/FT_SUBPIXELS;
244 font->glyph[font->numchars].advance = glyph->advance.x*20/65536;
247 font->glyph[font->numchars].shape = swf_ShapeDrawerToShape(&draw);
249 font->layout->bounds[font->numchars].xmin = (bbox.xMin*FT_SCALE*20)/FT_SUBPIXELS;
250 font->layout->bounds[font->numchars].ymin = (bbox.yMin*FT_SCALE*20)/FT_SUBPIXELS;
251 font->layout->bounds[font->numchars].xmax = (bbox.xMax*FT_SCALE*20)/FT_SUBPIXELS;
252 font->layout->bounds[font->numchars].ymax = (bbox.yMax*FT_SCALE*20)/FT_SUBPIXELS;
256 FT_Done_Glyph(glyph);
257 font->glyph2ascii[font->numchars] = font->glyph2ascii[t];
258 glyph2glyph[t] = font->numchars;
261 /* notice: if skipunused is true, font->glyph2ascii, font->glyphnames and font->layout->bounds will
262 have more memory allocated than just font->numchars, but only the first font->numchars
265 for(t=0;t<font->maxascii;t++) {
266 if(font->ascii2glyph[t]>=0) {
267 font->ascii2glyph[t] = glyph2glyph[font->ascii2glyph[t]];
273 FT_Done_FreeType(ftlibrary);ftlibrary=0;
277 #else //HAVE_FREETYPE
279 SWFFONT* swf_LoadTrueTypeFont(char*filename)
281 fprintf(stderr, "Warning: no freetype library- not able to load %s\n", filename);
291 static int t1lib_initialized = 0;
293 SWFFONT* swf_LoadT1Font(char*filename)
297 float angle,underline;
298 char*fontname,*fullname,*familyname;
306 if(!t1lib_initialized) {
308 if ((T1_InitLib(NO_LOGFILE)==NULL)){
309 fprintf(stderr, "Initialization of t1lib failed\n");
312 t1lib_initialized = 1;
314 nr = T1_AddFont(filename);
317 num = T1_SetDefaultEncoding(encoding);
318 for(;num<256;num++) encoding[num] = 0;
320 charnames = T1_GetAllCharNames(nr);
322 angle = T1_GetItalicAngle(nr);
323 fontname = T1_GetFontName(nr);
324 fullname = T1_GetFullName(nr);
325 familyname = T1_GetFamilyName(nr);
326 underline = T1_GetUnderlinePosition(nr);
327 bbox = T1_GetFontBBox(nr);
329 font = (SWFFONT*)malloc(sizeof(SWFFONT));
330 memset(font, 0, sizeof(SWFFONT));
334 font->name = (U8*)strdup(fontname);
337 font->layout = (SWFLAYOUT*)malloc(sizeof(SWFLAYOUT));
338 memset(font->layout, 0, sizeof(SWFLAYOUT));
341 charname = charnames;
347 font->maxascii = num;
348 font->numchars = num;
350 font->style = (/*bold*/0?FONT_STYLE_BOLD:0) + (angle>0.05?FONT_STYLE_ITALIC:0);
352 font->glyph = (SWFGLYPH*)malloc(num*sizeof(SWFGLYPH));
353 memset(font->glyph, 0, num*sizeof(SWFGLYPH));
354 font->glyph2ascii = (U16*)malloc(num*sizeof(U16));
355 memset(font->glyph2ascii, 0, num*sizeof(U16));
356 font->ascii2glyph = (int*)malloc(font->maxascii*sizeof(int));
357 memset(font->ascii2glyph, -1, font->maxascii*sizeof(int));
358 font->layout->ascent = (U16)(underline - bbox.lly);
359 font->layout->descent = (U16)(bbox.ury - underline);
360 font->layout->leading = (U16)(font->layout->ascent -
361 font->layout->descent -
362 (bbox.lly - bbox.ury));
363 font->layout->bounds = (SRECT*)malloc(sizeof(SRECT)*num);
364 memset(font->layout->bounds, 0, sizeof(SRECT)*num);
365 font->layout->kerningcount = 0;
366 font->layout->kerning = 0;
367 font->glyphnames = malloc(num*sizeof(char*));
368 memset(font->glyphnames, 0, num*sizeof(char*));
372 charname = charnames;
373 for(c=0;c<font->numchars;c++) {
376 T1_OUTLINE * outline;
380 outline = T1_GetCharOutline(nr, c, 100.0, 0);
381 firstx = outline->dest.x/0xffff;
387 font->glyphnames[c] = strdup(*charname);
390 font->ascii2glyph[c] = c;
391 font->glyph2ascii[c] = c;
393 swf_Shape01DrawerInit(&draw, 0);
396 pos.x += (outline->dest.x/(float)0xffff);
397 pos.y += (outline->dest.y/(float)0xffff);
399 if(outline->type == T1_PATHTYPE_MOVE) {
400 draw.moveTo(&draw,&pos);
401 } else if(outline->type == T1_PATHTYPE_LINE) {
402 draw.lineTo(&draw,&pos);
403 } else if(outline->type == T1_PATHTYPE_BEZIER) {
404 T1_BEZIERSEGMENT*o2 = (T1_BEZIERSEGMENT*)outline;
406 b.x = o2->B.x/(float)0xffff+last.x;
407 b.y = o2->B.y/(float)0xffff+last.y;
408 c.x = o2->C.x/(float)0xffff+last.x;
409 c.y = o2->C.y/(float)0xffff+last.y;
410 draw_cubicTo(&draw,&b,&c,&pos);
412 fprintf(stderr, "loadT1Font: unknown outline type:%d\n", outline->type);
415 outline = outline->link;
420 font->glyph[c].shape = swf_ShapeDrawerToShape(&draw);
421 bbox = swf_ShapeDrawerGetBBox(&draw);
424 font->layout->bounds[c] = bbox;
425 font->glyph[c].advance = bbox.xmax;
426 if(!font->glyph[c].advance) {
427 font->glyph[c].advance = firstx;
436 SWFFONT* swf_LoadT1Font(char*filename)
438 fprintf(stderr, "Warning: no t1lib- not able to load %s\n", filename);
444 static int isSWF(const char*filename)
446 FILE*fi = fopen(filename, "rb");
452 memset(a, 0, sizeof(a));
456 if(!strncmp(a, "FWS", 3) || !strncmp(a, "CWS", 3)) {
462 SWFFONT* swf_LoadFont(char*filename)
464 int is_swf = isSWF(filename);
468 return swf_ReadFont(filename);
470 #if defined(HAVE_FREETYPE)
471 return swf_LoadTrueTypeFont(filename);
472 #elif defined(HAVE_T1LIB)
473 return swf_LoadT1Font(filename);
475 fprintf(stderr, "Error: Neither T1lib nor FreeType support compiled in. Could not load %s\n", filename);