1 #include "evas_font_ot.h"
8 #include "evas_common.h"
11 #include "evas_font_private.h"
14 static const hb_script_t
15 _evas_script_to_harfbuzz[] =
57 HB_SCRIPT_CANADIAN_ABORIGINAL,
64 /* Unicode-4.0 additions */
74 /* Unicode-4.1 additions */
75 HB_SCRIPT_NEW_TAI_LUE,
79 HB_SCRIPT_SYLOTI_NAGRI,
80 HB_SCRIPT_OLD_PERSIAN,
83 /* Unicode-5.0 additions */
91 /* Unicode-5.1 additions */
104 /* Unicode-5.2 additions */
107 HB_SCRIPT_EGYPTIAN_HIEROGLYPHS,
108 HB_SCRIPT_IMPERIAL_ARAMAIC,
109 HB_SCRIPT_INSCRIPTIONAL_PAHLAVI,
110 HB_SCRIPT_INSCRIPTIONAL_PARTHIAN,
115 HB_SCRIPT_MEETEI_MAYEK,
116 HB_SCRIPT_OLD_SOUTH_ARABIAN,
117 HB_SCRIPT_OLD_TURKIC,
121 /* Unicode-6.0 additions */
129 /* FIXME: doc. returns #items */
131 evas_common_font_ot_cluster_size_get(const Evas_Text_Props *props, size_t char_index)
135 int left_bound, right_bound;
137 char_index += props->start;
138 base_cluster = EVAS_FONT_OT_POS_GET(props->info->ot[char_index]);
139 for (i = (int) char_index ;
140 (i >= (int) props->start) &&
141 (EVAS_FONT_OT_POS_GET(props->info->ot[i]) == base_cluster) ;
145 for (i = (int) char_index + 1;
146 (i < (int) (props->start + props->len)) &&
147 (EVAS_FONT_OT_POS_GET(props->info->ot[i]) == base_cluster) ;
152 if (right_bound == left_bound)
156 else if (props->bidi.dir == EVAS_BIDI_DIRECTION_RTL)
160 items = props->text_offset + props->text_len - base_cluster;
164 items = props->info->ot[left_bound].source_cluster - base_cluster;
169 if (right_bound >= (int) (props->text_offset + props->text_len))
171 items = props->text_offset + props->text_len - base_cluster;
175 items = props->info->ot[right_bound].source_cluster - base_cluster;
178 return (items > 0) ? items : 1;
182 evas_common_font_ot_load_face(void *_font)
184 RGBA_Font_Source *font = (RGBA_Font_Source *) _font;
185 /* Unload the face if by any chance it's already loaded */
186 evas_common_font_ot_unload_face(font);
187 font->hb.face = hb_ft_face_create(font->ft.face, NULL);
191 evas_common_font_ot_unload_face(void *_font)
193 RGBA_Font_Source *font = (RGBA_Font_Source *) _font;
194 if (!font->hb.face) return;
195 hb_face_destroy(font->hb.face);
196 font->hb.face = NULL;
199 /* Harfbuzz font functions */
202 _evas_common_font_ot_hb_get_glyph_advance(hb_font_t *font,
203 void *font_data, hb_codepoint_t glyph,
204 hb_position_t *x_advance, hb_position_t *y_advance,
208 RGBA_Font_Int *fi = (RGBA_Font_Int *) font_data;
212 fg = evas_common_font_int_cache_glyph_get(fi, glyph);
215 *x_advance = fg->glyph->advance.x >> 10;
216 *y_advance = fg->glyph->advance.y >> 10;
221 _evas_common_font_ot_hb_get_kerning(hb_font_t *font, void *font_data,
222 hb_codepoint_t first_glyph, hb_codepoint_t second_glyph,
223 hb_position_t *x_kern, hb_position_t *y_kern, void *user_data)
225 RGBA_Font_Int *fi = (RGBA_Font_Int *) font_data;
229 if (evas_common_font_query_kerning(fi, first_glyph, second_glyph, &kern))
236 /* End of harfbuzz font funcs */
238 static inline hb_font_funcs_t *
239 _evas_common_font_ot_font_funcs_get(void)
241 static hb_font_funcs_t *font_funcs = NULL;
244 font_funcs = hb_font_funcs_create();
245 hb_font_funcs_set_glyph_advance_func(font_funcs,
246 _evas_common_font_ot_hb_get_glyph_advance, NULL, NULL);
247 hb_font_funcs_set_kerning_func(font_funcs,
248 _evas_common_font_ot_hb_get_kerning, NULL, NULL);
254 static inline hb_unicode_funcs_t *
255 _evas_common_font_ot_unicode_funcs_get(void)
257 static hb_unicode_funcs_t *unicode_funcs = NULL;
260 unicode_funcs = hb_unicode_funcs_get_default();
263 return unicode_funcs;
267 _evas_common_font_ot_shape(hb_buffer_t *buffer, RGBA_Font_Int *fi)
269 hb_font_t *hb_font, *hb_ft_font;
271 hb_ft_font = hb_ft_font_create(fi->src->ft.face, NULL);
272 hb_font = hb_font_create_sub_font(hb_ft_font);
274 hb_font_set_funcs(hb_font, _evas_common_font_ot_font_funcs_get(), fi, NULL);
276 hb_shape(hb_font, buffer, NULL, 0);
278 hb_font_destroy(hb_font);
279 hb_font_destroy(hb_ft_font);
283 evas_common_font_ot_populate_text_props(void *_fn, const Eina_Unicode *text,
284 Evas_Text_Props *props, int len)
286 RGBA_Font *fn = (RGBA_Font *) _fn;
289 hb_glyph_position_t *positions;
290 hb_glyph_info_t *infos;
293 Evas_Font_Glyph_Info *gl_itr;
294 Evas_Font_OT_Info *ot_itr;
295 Evas_Coord pen_x = 0;
297 fi = fn->fonts->data;
298 /* Load the font needed for this script */
300 /* Skip common chars */
301 const Eina_Unicode *tmp;
304 evas_common_language_char_script_get(*tmp) == EVAS_SCRIPT_COMMON ;
307 if (!*tmp && (tmp > text)) tmp--;
308 evas_common_font_glyph_search(fn, &fi, *tmp);
310 evas_common_font_int_reload(fi);
311 if (fi->src->current_size != fi->size)
314 FT_Activate_Size(fi->ft.size);
316 fi->src->current_size = fi->size;
321 slen = eina_unicode_strlen(text);
328 buffer = hb_buffer_create(slen);
329 hb_buffer_set_unicode_funcs(buffer, _evas_common_font_ot_unicode_funcs_get());
330 hb_buffer_set_language(buffer, hb_language_from_string(
331 evas_common_language_from_locale_get()));
332 hb_buffer_set_script(buffer, _evas_script_to_harfbuzz[props->script]);
333 hb_buffer_set_direction(buffer,
334 (props->bidi.dir == EVAS_BIDI_DIRECTION_RTL) ?
335 HB_DIRECTION_RTL : HB_DIRECTION_LTR);
336 /* FIXME: add run-time conversions if needed, which is very unlikely */
337 hb_buffer_add_utf32(buffer, (const uint32_t *) text, slen, 0, slen);
339 _evas_common_font_ot_shape(buffer, fi);
341 props->len = hb_buffer_get_length(buffer);
342 props->info->ot = calloc(props->len,
343 sizeof(Evas_Font_OT_Info));
344 props->info->glyph = calloc(props->len,
345 sizeof(Evas_Font_Glyph_Info));
346 positions = hb_buffer_get_glyph_positions(buffer, NULL);
347 infos = hb_buffer_get_glyph_infos(buffer, NULL);
348 gl_itr = props->info->glyph;
349 ot_itr = props->info->ot;
350 for (i = 0 ; i < props->len ; i++)
353 ot_itr->source_cluster = infos->cluster;
354 ot_itr->x_offset = positions->x_offset;
355 ot_itr->y_offset = positions->y_offset;
356 gl_itr->index = infos->codepoint;
357 adv = positions->x_advance;
360 gl_itr->pen_after = EVAS_FONT_ROUND_26_6_TO_INT(pen_x);
368 hb_buffer_destroy(buffer);
369 evas_common_font_int_use_trim();