1 #include "evas_font_ot.h"
8 #include "evas_common.h"
11 #include "evas_font_private.h"
14 evas_common_font_ot_is_enabled(void)
24 env = getenv("EVAS_USE_OT");
35 /* FIXME: doc. returns #items */
37 evas_common_font_ot_cluster_size_get(const Evas_Text_Props *props, size_t char_index, int orig_len)
41 int left_bound, right_bound;
42 size_t base_cluster = EVAS_FONT_OT_POS_GET(props->ot_data->items[char_index]);
43 for (i = (int) char_index ;
45 (EVAS_FONT_OT_POS_GET(props->ot_data->items[i]) == base_cluster) ;
49 for (i = (int) char_index + 1;
50 (i < (int) props->ot_data->len) &&
51 (EVAS_FONT_OT_POS_GET(props->ot_data->items[i]) == base_cluster) ;
55 if (right_bound == left_bound)
59 else if (props->bidi.dir == EVAS_BIDI_DIRECTION_RTL)
64 props->ot_data->items[left_bound + 1].source_cluster;
68 items = props->ot_data->items[left_bound].source_cluster -
69 props->ot_data->items[left_bound + 1].source_cluster;
74 if (right_bound == (int) props->ot_data->len)
77 props->ot_data->items[right_bound - 1].source_cluster;
81 items = props->ot_data->items[right_bound].source_cluster -
82 props->ot_data->items[right_bound - 1].source_cluster;
85 return (items > 0) ? items : 1;
89 evas_common_font_ot_load_face(void *_font)
91 RGBA_Font_Source *font = (RGBA_Font_Source *) _font;
92 /* Unload the face if by any chance it's already loaded */
93 evas_common_font_ot_unload_face(font);
94 font->hb.face = hb_ft_face_create(font->ft.face, NULL);
98 evas_common_font_ot_unload_face(void *_font)
100 RGBA_Font_Source *font = (RGBA_Font_Source *) _font;
101 if (!font->hb.face) return;
102 hb_face_destroy(font->hb.face);
103 font->hb.face = NULL;
107 _evas_common_font_ot_shape(hb_buffer_t *buffer, RGBA_Font_Source *src)
111 hb_font = hb_ft_font_create(src->ft.face, NULL);
113 hb_shape(hb_font, src->hb.face, buffer, NULL, 0);
114 hb_font_destroy(hb_font);
117 /* Won't work in the middle of ligatures */
119 evas_common_font_ot_cutoff_text_props(Evas_Text_Props *props, int cutoff)
121 Evas_Font_OT_Data *new_data;
122 if ((cutoff <= 0) || (!props->ot_data) ||
123 (((size_t) cutoff) >= props->ot_data->len))
126 new_data = malloc(sizeof(Evas_Font_OT_Data));
127 memcpy(new_data, props->ot_data, sizeof(Evas_Font_OT_Data));
128 new_data->refcount = 1;
129 new_data->len = cutoff;
130 new_data->items = malloc(cutoff * sizeof(Evas_Font_OT_Data_Item));
132 if (props->bidi.dir == EVAS_BIDI_DIRECTION_RTL)
134 memcpy(new_data->items,
135 props->ot_data->items + (props->ot_data->len - cutoff),
136 cutoff * sizeof(Evas_Font_OT_Data_Item));
140 memcpy(new_data->items,
141 props->ot_data->items,
142 cutoff * sizeof(Evas_Font_OT_Data_Item));
145 evas_common_font_ot_props_unref(props->ot_data);
146 props->ot_data = new_data;
149 /* Won't work in the middle of ligatures
150 * aissumes ext doesn't have an already init ot_data
151 * we assume there's at least one char in each part */
153 evas_common_font_ot_split_text_props(Evas_Text_Props *base,
154 Evas_Text_Props *ext, int cutoff)
156 Evas_Font_OT_Data *new_data;
158 if ((cutoff <= 0) || (!base->ot_data) ||
159 (((size_t) cutoff) >= base->ot_data->len))
162 ext->ot_data = calloc(1, sizeof(Evas_Font_OT_Data));
163 ext->ot_data->refcount = 1;
164 ext->ot_data->len = base->ot_data->len - cutoff;
165 ext->ot_data->items = calloc(ext->ot_data->len,
166 sizeof(Evas_Font_OT_Data_Item));
168 new_data = malloc(sizeof(Evas_Font_OT_Data));
169 memcpy(new_data, base->ot_data, sizeof(Evas_Font_OT_Data));
170 new_data->refcount = 1;
171 new_data->items = malloc(cutoff * sizeof(Evas_Font_OT_Data_Item));
172 new_data->len = cutoff;
174 if (base->bidi.dir == EVAS_BIDI_DIRECTION_RTL)
176 memcpy(ext->ot_data->items, base->ot_data->items,
177 ext->ot_data->len * sizeof(Evas_Font_OT_Data_Item));
178 memcpy(new_data->items,
179 base->ot_data->items + ext->ot_data->len,
180 cutoff * sizeof(Evas_Font_OT_Data_Item));
184 memcpy(ext->ot_data->items, base->ot_data->items + cutoff,
185 ext->ot_data->len * sizeof(Evas_Font_OT_Data_Item));
186 memcpy(new_data->items, base->ot_data->items,
187 cutoff * sizeof(Evas_Font_OT_Data_Item));
189 evas_common_font_ot_props_unref(base->ot_data);
190 base->ot_data = new_data;
192 /* Adjust the offset of the clusters */
195 min = ext->ot_data->items[0].source_cluster;
196 for (i = 1 ; i < (int) ext->ot_data->len ; i++)
198 if (ext->ot_data->items[i].source_cluster < min)
200 min = ext->ot_data->items[i].source_cluster;
203 for (i = 0 ; i < (int) ext->ot_data->len ; i++)
205 ext->ot_data->items[i].source_cluster -= min;
207 ext->ot_data->offset = base->ot_data->offset + min;
211 /* Won't work in the middle of ligatures
212 * assumes both are init correctly and that both are from the
213 * same origin item, i.e both have the same script + direction.
214 * assume item1 is logically first */
216 evas_common_font_ot_merge_text_props(Evas_Text_Props *item1,
217 const Evas_Text_Props *item2)
219 Evas_Font_OT_Data *new_data;
220 Evas_Font_OT_Data_Item *itr; /* Itr will be used for adding back
223 if (!item1->ot_data || !item2->ot_data)
225 len = item1->ot_data->len + item2->ot_data->len;
227 new_data = malloc(sizeof(Evas_Font_OT_Data));
228 memcpy(new_data, item1->ot_data, sizeof(Evas_Font_OT_Data));
229 new_data->refcount = 1;
230 new_data->items = malloc(len * sizeof(Evas_Font_OT_Data_Item));
232 if (item1->bidi.dir == EVAS_BIDI_DIRECTION_RTL)
234 memcpy(new_data->items, item2->ot_data->items,
235 item2->ot_data->len * sizeof(Evas_Font_OT_Data_Item));
236 memcpy(new_data->items + item2->ot_data->len, item1->ot_data->items,
237 item1->ot_data->len * sizeof(Evas_Font_OT_Data_Item));
238 itr = new_data->items;
242 memcpy(new_data->items, item1->ot_data->items,
243 item1->ot_data->len * sizeof(Evas_Font_OT_Data_Item));
244 memcpy(new_data->items + item1->ot_data->len, item2->ot_data->items,
245 item2->ot_data->len * sizeof(Evas_Font_OT_Data_Item));
246 itr = new_data->items + item1->ot_data->len;
248 evas_common_font_ot_props_unref(item1->ot_data);
249 item1->ot_data = new_data;
250 /* Add back the offset of item2 to the newly created */
251 if (item2->ot_data->offset > 0)
254 for (i = 0 ; i < (int) item2->ot_data->len ; i++, itr++)
256 /* This must be > 0, just because this is how it works */
257 itr->source_cluster += item2->ot_data->offset -
258 item1->ot_data->offset;
264 evas_common_font_ot_populate_text_props(void *_fn, const Eina_Unicode *text,
265 Evas_Text_Props *props, int len)
267 RGBA_Font *fn = (RGBA_Font *) _fn;
270 hb_glyph_position_t *positions;
271 hb_glyph_info_t *infos;
274 if (!evas_common_font_ot_is_enabled()) return EINA_TRUE;
277 evas_common_font_ot_props_unref(props->ot_data);
279 props->ot_data = calloc(1, sizeof(Evas_Font_OT_Data));
280 props->ot_data->refcount = 1;
282 fi = fn->fonts->data;
283 /* Load the font needed for this script */
285 /* Skip common chars */
286 const Eina_Unicode *tmp;
289 evas_common_language_char_script_get(*tmp) == EVAS_SCRIPT_COMMON ;
292 if (!*tmp && (tmp > text)) tmp--;
293 evas_common_font_glyph_search(fn, &fi, *tmp);
295 evas_common_font_int_reload(fi);
296 if (fi->src->current_size != fi->size)
299 FT_Activate_Size(fi->ft.size);
301 fi->src->current_size = fi->size;
306 slen = eina_unicode_strlen(text);
313 buffer = hb_buffer_create(slen);
314 hb_buffer_set_unicode_funcs(buffer, evas_common_language_unicode_funcs_get());
315 hb_buffer_set_language(buffer, hb_language_from_string(
316 evas_common_language_from_locale_get()));
317 hb_buffer_set_script(buffer, props->script);
318 hb_buffer_set_direction(buffer,
319 (props->bidi.dir == EVAS_BIDI_DIRECTION_RTL) ?
320 HB_DIRECTION_RTL : HB_DIRECTION_LTR);
321 /* FIXME: add run-time conversions if needed, which is very unlikely */
322 hb_buffer_add_utf32(buffer, (const uint32_t *) text, slen, 0, slen);
324 _evas_common_font_ot_shape(buffer, fi->src);
326 props->ot_data->len = hb_buffer_get_length(buffer);
327 props->ot_data->items = calloc(props->ot_data->len,
328 sizeof(Evas_Font_OT_Data_Item));
329 positions = hb_buffer_get_glyph_positions(buffer);
330 infos = hb_buffer_get_glyph_infos(buffer);
331 for (i = 0 ; i < props->ot_data->len ; i++)
333 props->ot_data->items[i].index = infos[i].codepoint;
334 props->ot_data->items[i].source_cluster = infos[i].cluster;
335 props->ot_data->items[i].x_advance = positions[i].x_advance;
336 props->ot_data->items[i].x_offset = positions[i].x_offset;
337 props->ot_data->items[i].y_offset = positions[i].y_offset;
340 hb_buffer_destroy(buffer);
341 evas_common_font_int_use_trim();
347 evas_common_font_ot_props_ref(Evas_Font_OT_Data *data)
353 evas_common_font_ot_props_unref(Evas_Font_OT_Data *data)
356 if (--data->refcount == 0)