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 font->hb.face = hb_ft_face_create(font->ft.face, NULL);
96 evas_common_font_ot_unload_face(void *_font)
98 RGBA_Font_Source *font = (RGBA_Font_Source *) _font;
99 if (!font->hb.face) return;
100 hb_face_destroy(font->hb.face);
101 font->hb.face = NULL;
105 _evas_common_font_ot_shape(hb_buffer_t *buffer, RGBA_Font_Source *src)
109 hb_font = hb_ft_font_create(src->ft.face, NULL);
111 hb_shape(hb_font, src->hb.face, buffer, NULL, 0);
112 hb_font_destroy(hb_font);
115 /* Won't work in the middle of ligatures */
117 evas_common_font_ot_cutoff_text_props(Evas_Text_Props *props, int cutoff)
119 Evas_Font_OT_Data *new_data;
120 if ((cutoff <= 0) || (!props->ot_data) ||
121 (((size_t) cutoff) >= props->ot_data->len))
124 new_data = malloc(sizeof(Evas_Font_OT_Data));
125 memcpy(new_data, props->ot_data, sizeof(Evas_Font_OT_Data));
126 new_data->refcount = 1;
127 new_data->len = cutoff;
128 new_data->items = malloc(cutoff * sizeof(Evas_Font_OT_Data_Item));
130 if (props->bidi.dir == EVAS_BIDI_DIRECTION_RTL)
132 memcpy(new_data->items,
133 props->ot_data->items + (props->ot_data->len - cutoff),
134 cutoff * sizeof(Evas_Font_OT_Data_Item));
138 memcpy(new_data->items,
139 props->ot_data->items,
140 cutoff * sizeof(Evas_Font_OT_Data_Item));
143 evas_common_font_ot_props_unref(props->ot_data);
144 props->ot_data = new_data;
147 /* Won't work in the middle of ligatures
148 * aissumes ext doesn't have an already init ot_data
149 * we assume there's at least one char in each part */
151 evas_common_font_ot_split_text_props(Evas_Text_Props *base,
152 Evas_Text_Props *ext, int cutoff)
154 Evas_Font_OT_Data *new_data;
156 if ((cutoff <= 0) || (!base->ot_data) ||
157 (((size_t) cutoff) >= base->ot_data->len))
160 ext->ot_data = calloc(1, sizeof(Evas_Font_OT_Data));
161 ext->ot_data->refcount = 1;
162 ext->ot_data->len = base->ot_data->len - cutoff;
163 ext->ot_data->items = calloc(ext->ot_data->len,
164 sizeof(Evas_Font_OT_Data_Item));
166 new_data = malloc(sizeof(Evas_Font_OT_Data));
167 memcpy(new_data, base->ot_data, sizeof(Evas_Font_OT_Data));
168 new_data->refcount = 1;
169 new_data->items = malloc(cutoff * sizeof(Evas_Font_OT_Data_Item));
170 new_data->len = cutoff;
172 if (base->bidi.dir == EVAS_BIDI_DIRECTION_RTL)
174 memcpy(ext->ot_data->items, base->ot_data->items,
175 ext->ot_data->len * sizeof(Evas_Font_OT_Data_Item));
176 memcpy(new_data->items,
177 base->ot_data->items + ext->ot_data->len,
178 cutoff * sizeof(Evas_Font_OT_Data_Item));
182 memcpy(ext->ot_data->items, base->ot_data->items + cutoff,
183 ext->ot_data->len * sizeof(Evas_Font_OT_Data_Item));
184 memcpy(new_data->items, base->ot_data->items,
185 cutoff * sizeof(Evas_Font_OT_Data_Item));
187 evas_common_font_ot_props_unref(base->ot_data);
188 base->ot_data = new_data;
190 /* Adjust the offset of the clusters */
193 min = ext->ot_data->items[0].source_cluster;
194 for (i = 1 ; i < (int) ext->ot_data->len ; i++)
196 if (ext->ot_data->items[i].source_cluster < min)
198 min = ext->ot_data->items[i].source_cluster;
201 for (i = 0 ; i < (int) ext->ot_data->len ; i++)
203 ext->ot_data->items[i].source_cluster -= min;
205 ext->ot_data->offset = base->ot_data->offset + min;
209 /* Won't work in the middle of ligatures
210 * assumes both are init correctly and that both are from the
211 * same origin item, i.e both have the same script + direction.
212 * assume item1 is logically first */
214 evas_common_font_ot_merge_text_props(Evas_Text_Props *item1,
215 const Evas_Text_Props *item2)
217 Evas_Font_OT_Data *new_data;
218 Evas_Font_OT_Data_Item *itr; /* Itr will be used for adding back
221 if (!item1->ot_data || !item2->ot_data)
223 len = item1->ot_data->len + item2->ot_data->len;
225 new_data = malloc(sizeof(Evas_Font_OT_Data));
226 memcpy(new_data, item1->ot_data, sizeof(Evas_Font_OT_Data));
227 new_data->refcount = 1;
228 new_data->items = malloc(len * sizeof(Evas_Font_OT_Data_Item));
230 if (item1->bidi.dir == EVAS_BIDI_DIRECTION_RTL)
232 memcpy(new_data->items, item2->ot_data->items,
233 item2->ot_data->len * sizeof(Evas_Font_OT_Data_Item));
234 memcpy(new_data->items + item2->ot_data->len, item1->ot_data->items,
235 item1->ot_data->len * sizeof(Evas_Font_OT_Data_Item));
236 itr = new_data->items;
240 memcpy(new_data->items, item1->ot_data->items,
241 item1->ot_data->len * sizeof(Evas_Font_OT_Data_Item));
242 memcpy(new_data->items + item1->ot_data->len, item2->ot_data->items,
243 item2->ot_data->len * sizeof(Evas_Font_OT_Data_Item));
244 itr = new_data->items + item1->ot_data->len;
246 evas_common_font_ot_props_unref(item1->ot_data);
247 item1->ot_data = new_data;
248 /* Add back the offset of item2 to the newly created */
249 if (item2->ot_data->offset > 0)
252 for (i = 0 ; i < (int) item2->ot_data->len ; i++, itr++)
254 /* This must be > 0, just because this is how it works */
255 itr->source_cluster += item2->ot_data->offset -
256 item1->ot_data->offset;
262 evas_common_font_ot_populate_text_props(void *_fn, const Eina_Unicode *text,
263 Evas_Text_Props *props, int len)
265 RGBA_Font *fn = (RGBA_Font *) _fn;
268 hb_glyph_position_t *positions;
269 hb_glyph_info_t *infos;
272 if (!evas_common_font_ot_is_enabled()) return EINA_TRUE;
275 evas_common_font_ot_props_unref(props->ot_data);
277 props->ot_data = calloc(1, sizeof(Evas_Font_OT_Data));
278 props->ot_data->refcount = 1;
280 fi = fn->fonts->data;
281 /* Load the font needed for this script */
283 /* Skip common chars */
284 const Eina_Unicode *tmp;
287 evas_common_language_char_script_get(*tmp) == EVAS_SCRIPT_COMMON ;
290 if (!*tmp && (tmp > text)) tmp--;
291 evas_common_font_glyph_search(fn, &fi, *tmp);
293 evas_common_font_int_reload(fi);
294 if (fi->src->current_size != fi->size)
297 FT_Activate_Size(fi->ft.size);
299 fi->src->current_size = fi->size;
304 slen = eina_unicode_strlen(text);
311 buffer = hb_buffer_create(slen);
312 hb_buffer_set_unicode_funcs(buffer, evas_common_language_unicode_funcs_get());
313 hb_buffer_set_language(buffer, hb_language_from_string(
314 evas_common_language_from_locale_get()));
315 hb_buffer_set_script(buffer, props->script);
316 hb_buffer_set_direction(buffer,
317 (props->bidi.dir == EVAS_BIDI_DIRECTION_RTL) ?
318 HB_DIRECTION_RTL : HB_DIRECTION_LTR);
319 /* FIXME: add run-time conversions if needed, which is very unlikely */
320 hb_buffer_add_utf32(buffer, (const uint32_t *) text, slen, 0, slen);
322 _evas_common_font_ot_shape(buffer, fi->src);
324 props->ot_data->len = hb_buffer_get_length(buffer);
325 props->ot_data->items = calloc(props->ot_data->len,
326 sizeof(Evas_Font_OT_Data_Item));
327 positions = hb_buffer_get_glyph_positions(buffer);
328 infos = hb_buffer_get_glyph_infos(buffer);
329 for (i = 0 ; i < props->ot_data->len ; i++)
331 props->ot_data->items[i].index = infos[i].codepoint;
332 props->ot_data->items[i].source_cluster = infos[i].cluster;
333 props->ot_data->items[i].x_advance = positions[i].x_advance;
334 props->ot_data->items[i].x_offset = positions[i].x_offset;
335 props->ot_data->items[i].y_offset = positions[i].y_offset;
338 hb_buffer_destroy(buffer);
339 evas_common_font_int_use_trim();
345 evas_common_font_ot_props_ref(Evas_Font_OT_Data *data)
351 evas_common_font_ot_props_unref(Evas_Font_OT_Data *data)
354 if (--data->refcount == 0)