3 Functions for loading external fonts.
5 Extension module for the rfxswf library.
6 Part of the swftools package.
8 Copyright (c) 2003, 2004, 2005 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 */
24 #include "../config.h"
25 #include "gfxdevice.h"
28 static int loadfont_scale = 64;
29 static int full_unicode = 1;
33 #ifdef HAVE_FT2BUILD_H
35 #include FT_FREETYPE_H
38 #include FT_SFNT_NAMES_H
39 #include FT_TRUETYPE_IDS_H
42 #include <freetype/freetype.h>
43 #include <freetype/ftglyph.h>
44 #include <freetype/ftsizes.h>
45 #include <freetype/ftsnames.h>
46 #include <freetype/ttnameid.h>
47 #include <freetype/ftoutln.h>
50 /* Setting subpixels to 64 also means that the "point size" of the
51 font outlines will be 64. So the font, when rendered at original
52 size (i.e., the swf fontsize is 1024) will have the same size as
53 if it was rendered at 64pt */
56 #define FT_SUBPIXELS 64
58 typedef struct _gfxdrawinfo_t {
63 static int ft_move_to(const FT_Vector* _to, void* user)
65 gfxdrawinfo_t* info = (gfxdrawinfo_t*)user;
66 gfxdrawer_t* draw = info->draw;
67 double x = _to->x*FT_SCALE/(float)FT_SUBPIXELS;
68 double y = -_to->y*FT_SCALE/(float)FT_SUBPIXELS;
69 draw->moveTo(draw, x,y);
72 static int ft_line_to(const FT_Vector* _to, void* user)
74 gfxdrawinfo_t* info = (gfxdrawinfo_t*)user;
75 gfxdrawer_t* draw = info->draw;
76 double x = _to->x*FT_SCALE/(float)FT_SUBPIXELS;
77 double y = -_to->y*FT_SCALE/(float)FT_SUBPIXELS;
78 draw->lineTo(draw, x,y);
81 static int ft_cubic_to(const FT_Vector* _c1, const FT_Vector* _c2, const FT_Vector* _to, void* user)
83 gfxdrawinfo_t* info = (gfxdrawinfo_t*)user;
84 gfxdrawer_t* draw = info->draw;
85 double tox = _to->x*FT_SCALE/(float)FT_SUBPIXELS;
86 double toy = -_to->y*FT_SCALE/(float)FT_SUBPIXELS;
87 double c1x = _c1->x*FT_SCALE/(float)FT_SUBPIXELS;
88 double c1y = -_c1->y*FT_SCALE/(float)FT_SUBPIXELS;
89 double c2x = _c2->x*FT_SCALE/(float)FT_SUBPIXELS;
90 double c2y = -_c2->y*FT_SCALE/(float)FT_SUBPIXELS;
91 gfxdraw_cubicTo(draw, c1x, c1y, c2x, c2y, tox, toy, info->quality);
94 static int ft_conic_to(const FT_Vector* _c, const FT_Vector* _to, void* user)
96 gfxdrawinfo_t* info = (gfxdrawinfo_t*)user;
97 gfxdrawer_t* draw = info->draw;
98 double tox = _to->x*FT_SCALE/(float)FT_SUBPIXELS;
99 double toy = -_to->y*FT_SCALE/(float)FT_SUBPIXELS;
100 double cx = _c->x*FT_SCALE/(float)FT_SUBPIXELS;
101 double cy = -_c->y*FT_SCALE/(float)FT_SUBPIXELS;
102 gfxdraw_conicTo(draw, cx,cy, tox,toy, info->quality);
105 static FT_Outline_Funcs outline_functions =
114 static FT_Library ftlibrary = 0;
116 static gfxglyph_t cloneGlyph(gfxglyph_t*src)
119 memset(&dest, 0, sizeof(dest));
121 dest.name = strdup(src->name);
122 dest.advance = src->advance;
123 dest.unicode = src->unicode;
124 dest.line = gfxline_clone(src->line);
128 static void glyph_clear(gfxglyph_t*g)
132 free((void*)g->name); g->name = 0;
134 gfxline_free(g->line);g->line = 0;
137 static int errorno = 0;
141 gfxfont_t* gfxfont_load(char*id, char*filename, unsigned int flags, double quality)
145 const char* fontname = 0;
151 int*glyph2unicode = 0;
156 int has_had_errors = 0;
160 if(FT_Init_FreeType(&ftlibrary)) {
161 fprintf(stderr, "Couldn't init freetype library!\n");
165 error = FT_New_Face(ftlibrary, filename, 0, &face);
166 FT_Set_Pixel_Sizes (face, 16*loadfont_scale, 16*loadfont_scale);
168 printf("gfxfont_load(%s, %s, %f)\n", id, filename, quality);
172 fprintf(stderr, "Couldn't load file %s- not a TTF file? (error=%02x)\n", filename, error);
175 if(face->num_glyphs <= 0) {
176 fprintf(stderr, "File %s contains %d glyphs\n", face->num_glyphs);
180 font = rfx_calloc(sizeof(gfxfont_t));
181 //font->style = ((face->style_flags&FT_STYLE_FLAG_ITALIC)?FONT_STYLE_ITALIC:0) |((face->style_flags&FT_STYLE_FLAG_BOLD)?FONT_STYLE_BOLD:0);
182 //font->ascent = abs(face->ascender)*FT_SCALE*loadfont_scale*20/FT_SUBPIXELS/2; //face->bbox.xMin;
183 //font->descent = abs(face->descender)*FT_SCALE*loadfont_scale*20/FT_SUBPIXELS/2; //face->bbox.xMax;
184 //font->leading = font->layout->ascent + font->layout->descent;
185 //font->encoding = FONT_ENCODING_UNICODE;
186 font->max_unicode = 0;
187 font->id = strdup(id);
189 font->glyphs = rfx_calloc(face->num_glyphs*sizeof(gfxglyph_t));
190 glyph2unicode = rfx_calloc(face->num_glyphs*sizeof(int));
191 glyph2glyph = rfx_calloc(face->num_glyphs*sizeof(int));
193 if(FT_HAS_GLYPH_NAMES(face)) {
194 //font->glyphnames = rfx_calloc(face->num_glyphs*sizeof(char*));
197 fontname = FT_Get_Postscript_Name(face);
200 for(t=0;t<face->num_charmaps;t++) {
201 printf("possible encoding: %c%c%c%c (%d of %d)\n",
202 (face->charmaps[t]->encoding >> 24)&255,
203 (face->charmaps[t]->encoding >> 16)&255,
204 (face->charmaps[t]->encoding >> 8)&255,
205 (face->charmaps[t]->encoding >> 0)&255,
206 t+1, face->num_charmaps
213 charcode = FT_Get_First_Char(face, &gindex);
217 if(gindex >= 0 && gindex<face->num_glyphs) {
218 if(!glyph2unicode[gindex]) {
219 glyph2unicode[gindex] = charcode;
220 if(charcode + 1 > font->max_unicode) {
221 font->max_unicode = charcode + 1;
225 charcode = FT_Get_Next_Char(face, charcode, &gindex);
230 printf("ENCODING: %c%c%c%c (%d of %d) max_unicode=%d\n",
231 (face->charmap->encoding >> 24)&255,
232 (face->charmap->encoding >> 16)&255,
233 (face->charmap->encoding >> 8)&255,
234 (face->charmap->encoding >> 0)&255,
235 charmap, face->num_charmaps, font->max_unicode
238 printf("ENCODING: NONE (%d of %d) max_unicode=%d\n",
239 charmap, face->num_charmaps, font->max_unicode
244 /* if we didn't find a single encoding character, try
245 the font's charmaps instead. That usually means that
246 the encoding is no longer unicode.
247 TODO: find a way to convert the encoding to unicode
249 if(font->max_unicode == 0 && charmap < face->num_charmaps-1
250 && face->charmaps[charmap+1]->encoding != 0x41444243 /* adbc, custom */
251 && face->charmaps[charmap+1]->encoding != 0x61726d6e /* armn */
255 FT_Set_Charmap(face, face->charmaps[charmap]);
260 /* TODO: if isunicode is 1, we now need to permutate the character
261 order so that each character is at it's encoding position */
264 font->max_unicode = 65535;
266 font->unicode2glyph = rfx_calloc(font->max_unicode*sizeof(int));
268 for(t=0;t<font->max_unicode;t++) {
269 int g = FT_Get_Char_Index(face, t);
270 if(!g || g>=face->num_glyphs)
272 font->unicode2glyph[t] = g;
275 printf("u%d ->%d\n", t, g);
278 if(!glyph2unicode[g]) {
279 glyph2unicode[g] = t;
283 font->max_unicode = max_unicode;
285 font->num_glyphs = 0;
288 for(t=0; t < face->num_glyphs; t++) {
289 if(FT_HAS_GLYPH_NAMES(face)) {
291 error = FT_Get_Glyph_Name(face, t, name, 127);
292 if(!error && name[0] && !strstr(name, "notdef")) {
299 for(t=0; t < face->num_glyphs; t++) {
311 font->glyphs[font->num_glyphs].advance = 0;
312 font->glyphs[font->num_glyphs].line = 0;
313 font->glyphs[font->num_glyphs].unicode = glyph2unicode[t];
314 font->glyphs[font->num_glyphs].name = 0;
316 if(FT_HAS_GLYPH_NAMES(face) && (num_names >= face->num_glyphs/10 || num_names > 2)) {
318 error = FT_Get_Glyph_Name(face, t, name, 127);
319 if(!error && name[0] && !strstr(name, "notdef")) {
320 font->glyphs[font->num_glyphs].name = strdup(name);
325 #if 0 // some cantonese pdfs fail to work if this is activated
327 if(has_had_errors && (isunicode && !glyph2unicode[t]) && !hasname && t>=256) {
328 /* some freetype versions crash or corrupt memory if we try to load
329 characters (without unicode index or name) above 256 for some fonts.
330 So skip those characters once the first error occured */
336 error = FT_Load_Glyph(face, t, FT_LOAD_NO_BITMAP);
339 fprintf(stderr, "Warning: glyph %d/%d (unicode %d, name %s) has return code %d\n", t, face->num_glyphs, glyph2unicode[t], name, error);
341 fprintf(stderr, "Warning: glyph %d/%d (unicode %d) has return code %d\n", t, face->num_glyphs, glyph2unicode[t], error);
345 if(!has_had_errors) {
347 if(fontname && *fontname) {
348 fprintf(stderr, "font has been copied to %s.ttf\n", fontname);
349 sprintf(buf, "cp %s %s.ttf", filename, fontname);
351 fprintf(stderr, "font has been copied to badfont%d.ttf\n", errorno);
352 sprintf(buf, "cp %s badfont%d.ttf", filename, errorno);
362 error = FT_Get_Glyph(face->glyph, &glyph);
364 fprintf(stderr, "Couldn't get glyph %d/%d, error:%d\n", t, face->num_glyphs, error);
372 gfxdrawer_target_gfxline(&draw);
374 info.quality = quality;
376 //error = FT_Outline_Decompose(&face->glyph->outline, &outline_functions, &info);
377 error = FT_Outline_Decompose(&face->glyph->outline, &outline_functions, &info);
380 fprintf(stderr, "Couldn't decompose glyph %d\n", t);
381 gfxline_free((gfxline_t*)draw.result(&draw));
382 FT_Done_Glyph(glyph);
385 font->glyphs[font->num_glyphs].advance = glyph->advance.x/65536;
386 font->glyphs[font->num_glyphs].line = (gfxline_t*)draw.result(&draw);
388 l = font->glyphs[font->num_glyphs].line;
390 if(l->type != gfx_moveTo) {
396 gfxline_free(font->glyphs[font->num_glyphs].line);
397 font->glyphs[font->num_glyphs].line = 0;
398 font->glyphs[font->num_glyphs].advance = 0;
400 /* Some PDFs created e.g. by InDesign tend to create
401 fonts with reduced (empty) characters, which still
402 have unicode indices attached to them.
403 Remove that information, in order to not confuse
404 any converter applications.
406 font->glyphs[font->num_glyphs].unicode = 0;
407 if(font->glyphs[font->num_glyphs].name) {
408 free((void*)font->glyphs[font->num_glyphs].name);
409 font->glyphs[font->num_glyphs].name = 0;
411 FT_Done_Glyph(glyph);
417 FT_Done_Glyph(glyph);
418 font->glyphs[font->num_glyphs].unicode = glyph2unicode[t];
421 glyph2glyph[t] = font->num_glyphs;
425 /* notice: if skip_unused is true, font->glyph2unicode, font->glyphnames and font->layout->bounds will
426 have more memory allocated than just font->num_glyphs, but only the first font->numchars
429 for(t=0;t<font->max_unicode;t++) {
430 if(font->unicode2glyph[t]>=0) {
431 font->unicode2glyph[t] = glyph2glyph[font->unicode2glyph[t]];
434 rfx_free(glyph2glyph);
435 rfx_free(glyph2unicode);
438 FT_Done_FreeType(ftlibrary);ftlibrary=0;
440 if(!isunicode && font->num_glyphs>0 && font->max_unicode) {
441 /* if the encoding isn't unicode, remap the font
442 so that the encoding equals the char position, and
443 remove the unicode table */
445 gfxglyph_t*newglyphs = rfx_calloc(font->max_unicode*sizeof(gfxglyph_t));
447 for(t=0;t<max_unicode;t++) {
448 int c = font->unicode2glyph[t];
449 if(c>=font->num_glyphs || c<0)
451 newglyphs[t] = cloneGlyph(&font->glyphs[c]);
452 newglyphs[t].unicode = -1;
454 for(t=0;t<font->num_glyphs;t++) {
455 glyph_clear(&font->glyphs[t]);
458 font->glyphs = newglyphs;
459 font->num_glyphs = font->max_unicode;
461 free(font->unicode2glyph);font->unicode2glyph = 0;
462 font->max_unicode = 0;
465 if(font->unicode2glyph) {
468 /* check whether the Unicode indices look o.k.
469 If they don't, disable the unicode lookup by setting
470 the unicode map to -1 everywhere */
471 for(t=0;t<font->num_glyphs;t++) {
472 int c = font->glyphs[t].unicode;
473 gfxline_t* line = font->glyphs[t].line;
474 if(c && c < 32 && (line && line->next && line->next->next)) {
475 // the character maps into the unicode control character range
476 // between 0001-001f. Yet it is not empty. Treat the one
477 // mapping as broken, and look how many of those we find.
482 free(font->unicode2glyph);font->unicode2glyph = 0;
483 font->max_unicode = 0;
484 for(t=0;t<font->num_glyphs;t++) {
485 font->glyphs[t].unicode = -1;
494 gfxfont_t* gfxfont_load(char*filename)
496 fprintf(stderr, "No freetype support compiled in! Not able to load %s\n", filename);
501 void gfxfont_free(gfxfont_t*font)
504 for(t=0;t<font->num_glyphs;t++) {
505 glyph_clear(&font->glyphs[t]);
508 free(font->glyphs);font->glyphs = 0;
510 font->num_glyphs = 0;
511 if(font->unicode2glyph) {
512 free(font->unicode2glyph);font->unicode2glyph = 0;