1 // -*- c-basic-offset: 8; indent-tabs-mode: t -*-
2 // vim:ts=8:sw=8:noet:ai:
4 Copyright (C) 2006 Evgeniy Stepanov <eugeni.stepanov@gmail.com>
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
25 #include FT_FREETYPE_H
26 #include FT_SYNTHESIS_H
30 #include "ass_library.h"
32 #include "ass_bitmap.h"
33 #include "ass_cache.h"
34 #include "ass_fontconfig.h"
38 * Select Microfost Unicode CharMap, if the font has one.
39 * Otherwise, let FreeType decide.
41 static void charmap_magic(FT_Face face)
44 for (i = 0; i < face->num_charmaps; ++i) {
45 FT_CharMap cmap = face->charmaps[i];
46 unsigned pid = cmap->platform_id;
47 unsigned eid = cmap->encoding_id;
48 if (pid == 3 /*microsoft*/ && (eid == 1 /*unicode bmp*/ || eid == 10 /*full unicode*/)) {
49 FT_Set_Charmap(face, cmap);
55 if (face->num_charmaps == 0) {
56 mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_NoCharmaps);
59 mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_NoCharmapAutodetected);
60 FT_Set_Charmap(face, face->charmaps[0]);
66 * \brief find a memory font by name
68 static int find_font(ass_library_t* library, char* name)
71 for (i = 0; i < library->num_fontdata; ++i)
72 if (strcasecmp(name, library->fontdata[i].name) == 0)
78 * \brief Create a new ass_font_t according to "desc" argument
80 ass_font_t* ass_font_new(ass_library_t* library, FT_Library ftlibrary, void* fc_priv, ass_font_desc_t* desc)
89 font = ass_font_cache_find(desc);
93 path = fontconfig_select(fc_priv, desc->family, desc->bold, desc->italic, &index);
95 mem_idx = find_font(library, path);
97 error = FT_New_Memory_Face(ftlibrary, (unsigned char*)library->fontdata[mem_idx].data,
98 library->fontdata[mem_idx].size, 0, &face);
100 mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_ErrorOpeningMemoryFont, path);
104 error = FT_New_Face(ftlibrary, path, index, &face);
106 mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_ErrorOpeningFont, path, index);
113 font = calloc(1, sizeof(ass_font_t));
114 font->ftlibrary = ftlibrary;
115 font->faces[0] = face;
117 font->desc.family = strdup(desc->family);
118 font->desc.bold = desc->bold;
119 font->desc.italic = desc->italic;
121 font->m.xx = font->m.yy = (FT_Fixed)0x10000L;
122 font->m.xy = font->m.yy = 0;
123 font->v.x = font->v.y = 0;
126 #ifdef HAVE_FONTCONFIG
127 font->charset = FcCharSetCreate();
130 ass_font_cache_add(font);
136 * \brief Set font transformation matrix and shift vector
138 void ass_font_set_transform(ass_font_t* font, FT_Matrix* m, FT_Vector* v)
147 for (i = 0; i < font->n_faces; ++i)
148 FT_Set_Transform(font->faces[i], &font->m, &font->v);
152 * \brief Set font size
154 void ass_font_set_size(ass_font_t* font, int size)
157 if (font->size != size) {
159 for (i = 0; i < font->n_faces; ++i)
160 FT_Set_Pixel_Sizes(font->faces[i], 0, size);
164 #ifdef HAVE_FONTCONFIG
166 * \brief Select a new FT_Face with the given character
167 * The new face is added to the end of font->faces.
169 static void ass_font_reselect(void* fontconfig_priv, ass_font_t* font, uint32_t ch)
176 if (font->n_faces == ASS_FONT_MAX_FACES)
179 path = fontconfig_select_with_charset(fontconfig_priv, font->desc.family, font->desc.bold,
180 font->desc.italic, &index, font->charset);
182 error = FT_New_Face(font->ftlibrary, path, index, &face);
184 mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_ErrorOpeningFont, path, index);
189 error = FT_Get_Char_Index(face, ch);
190 if (error == 0) { // the new font face is not better then the old one
195 font->faces[font->n_faces++] = face;
197 FT_Set_Transform(face, &font->m, &font->v);
198 FT_Set_Pixel_Sizes(face, 0, font->size);
203 * \brief Get maximal font ascender and descender.
204 * \param ch character code
205 * The values are extracted from the font face that provides glyphs for the given character
207 void ass_font_get_asc_desc(ass_font_t* font, uint32_t ch, int* asc, int* desc)
210 for (i = 0; i < font->n_faces; ++i) {
211 FT_Face face = font->faces[i];
212 if (FT_Get_Char_Index(face, ch)) {
214 v = face->size->metrics.ascender;
215 v2 = FT_MulFix(face->bbox.yMax, face->size->metrics.y_scale);
216 *asc = (v > v2 * 0.9) ? v : v2;
218 v = - face->size->metrics.descender;
219 v2 = - FT_MulFix(face->bbox.yMin, face->size->metrics.y_scale);
220 *desc = (v > v2 * 0.9) ? v : v2;
230 * \param ch character code
232 FT_Glyph ass_font_get_glyph(void* fontconfig_priv, ass_font_t* font, uint32_t ch)
242 if (font->n_faces == 0)
245 for (i = 0; i < font->n_faces; ++i) {
246 face = font->faces[i];
247 index = FT_Get_Char_Index(face, ch);
252 #ifdef HAVE_FONTCONFIG
253 FcCharSetAddChar(font->charset, ch);
255 mp_msg(MSGT_ASS, MSGL_INFO, MSGTR_LIBASS_GlyphNotFoundReselectingFont,
256 ch, font->desc.family, font->desc.bold, font->desc.italic);
257 ass_font_reselect(fontconfig_priv, font, ch);
258 face = font->faces[font->n_faces - 1];
259 index = FT_Get_Char_Index(face, ch);
261 mp_msg(MSGT_ASS, MSGL_ERR, MSGTR_LIBASS_GlyphNotFound,
262 ch, font->desc.family, font->desc.bold, font->desc.italic);
267 error = FT_Load_Glyph(face, index, FT_LOAD_NO_BITMAP );
269 mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_ErrorLoadingGlyph);
273 #if (FREETYPE_MAJOR > 2) || \
274 ((FREETYPE_MAJOR == 2) && (FREETYPE_MINOR >= 2)) || \
275 ((FREETYPE_MAJOR == 2) && (FREETYPE_MINOR == 1) && (FREETYPE_PATCH >= 10))
276 // FreeType >= 2.1.10 required
277 if (!(face->style_flags & FT_STYLE_FLAG_ITALIC) &&
278 (font->desc.italic > 55)) {
279 FT_GlyphSlot_Oblique(face->glyph);
282 error = FT_Get_Glyph(face->glyph, &glyph);
284 mp_msg(MSGT_ASS, MSGL_WARN, MSGTR_LIBASS_ErrorLoadingGlyph);
292 * \brief Get kerning for the pair of glyphs.
294 FT_Vector ass_font_get_kerning(ass_font_t* font, uint32_t c1, uint32_t c2)
296 FT_Vector v = {0, 0};
299 for (i = 0; i < font->n_faces; ++i) {
300 FT_Face face = font->faces[i];
301 int i1 = FT_Get_Char_Index(face, c1);
302 int i2 = FT_Get_Char_Index(face, c2);
304 if (FT_HAS_KERNING(face))
305 FT_Get_Kerning(face, i1, i2, FT_KERNING_DEFAULT, &v);
308 if (i1 || i2) // these glyphs are from different font faces, no kerning information
315 * \brief Deallocate ass_font_t
317 void ass_font_free(ass_font_t* font)
320 for (i = 0; i < font->n_faces; ++i)
321 if (font->faces[i]) FT_Done_Face(font->faces[i]);
322 if (font->desc.family) free(font->desc.family);
323 #ifdef HAVE_FONTCONFIG
324 if (font->charset) FcCharSetDestroy(font->charset);