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_Item *tmp;
120 if ((cutoff <= 0) || (!props->ot_data) ||
121 (((size_t) cutoff) >= props->ot_data->len))
124 if (props->bidi.dir == EVAS_BIDI_DIRECTION_RTL)
126 memmove(props->ot_data->items,
127 props->ot_data->items + (props->ot_data->len - cutoff),
128 cutoff * sizeof(Evas_Font_OT_Data_Item));
130 tmp = realloc(props->ot_data->items,
131 cutoff * sizeof(Evas_Font_OT_Data_Item));
132 props->ot_data->items = tmp;
133 props->ot_data->len = cutoff;
137 /* Won't work in the middle of ligatures
138 * aissumes ext doesn't have an already init ot_data
139 * we assume there's at least one char in each part */
141 evas_common_font_ot_split_text_props(Evas_Text_Props *base,
142 Evas_Text_Props *ext, int cutoff)
144 Evas_Font_OT_Data_Item *tmp;
146 if ((cutoff <= 0) || (!base->ot_data) ||
147 (((size_t) cutoff) >= base->ot_data->len))
150 ext->ot_data = calloc(1, sizeof(Evas_Font_OT_Data));
151 ext->ot_data->refcount = 1;
152 ext->ot_data->len = base->ot_data->len - cutoff;
153 ext->ot_data->items = calloc(ext->ot_data->len,
154 sizeof(Evas_Font_OT_Data_Item));
155 if (base->bidi.dir == EVAS_BIDI_DIRECTION_RTL)
157 memcpy(ext->ot_data->items, base->ot_data->items,
158 ext->ot_data->len * sizeof(Evas_Font_OT_Data_Item));
159 memmove(base->ot_data->items,
160 base->ot_data->items + ext->ot_data->len,
161 cutoff * sizeof(Evas_Font_OT_Data_Item));
165 memcpy(ext->ot_data->items, base->ot_data->items + cutoff,
166 ext->ot_data->len * sizeof(Evas_Font_OT_Data_Item));
169 /* Adjust the offset of the clusters */
172 min = ext->ot_data->items[0].source_cluster;
173 for (i = 1 ; i < (int) ext->ot_data->len ; i++)
175 if (ext->ot_data->items[i].source_cluster < min)
177 min = ext->ot_data->items[i].source_cluster;
180 for (i = 0 ; i < (int) ext->ot_data->len ; i++)
182 ext->ot_data->items[i].source_cluster -= min;
184 ext->ot_data->offset = base->ot_data->offset + min;
186 tmp = realloc(base->ot_data->items,
187 cutoff * sizeof(Evas_Font_OT_Data_Item));
188 base->ot_data->items = tmp;
189 base->ot_data->len = cutoff;
193 /* Won't work in the middle of ligatures
194 * assumes both are init correctly and that both are from the
195 * same origin item, i.e both have the same script + direction.
196 * assume item1 is logically first */
198 evas_common_font_ot_merge_text_props(Evas_Text_Props *item1,
199 const Evas_Text_Props *item2)
201 Evas_Font_OT_Data_Item *tmp, *itr; /* Itr will be used for adding back
204 if (!item1->ot_data || !item2->ot_data)
206 len = item1->ot_data->len + item2->ot_data->len;
207 tmp = calloc(len, sizeof(Evas_Font_OT_Data_Item));
208 if (item1->bidi.dir == EVAS_BIDI_DIRECTION_RTL)
210 memcpy(tmp, item2->ot_data->items,
211 item2->ot_data->len * sizeof(Evas_Font_OT_Data_Item));
212 memcpy(tmp + item2->ot_data->len, item1->ot_data->items,
213 item1->ot_data->len * sizeof(Evas_Font_OT_Data_Item));
218 memcpy(tmp, item1->ot_data->items,
219 item1->ot_data->len * sizeof(Evas_Font_OT_Data_Item));
220 memcpy(tmp + item1->ot_data->len, item2->ot_data->items,
221 item2->ot_data->len * sizeof(Evas_Font_OT_Data_Item));
222 itr = tmp + item1->ot_data->len;
224 free(item1->ot_data->items);
225 item1->ot_data->items = tmp;
226 item1->ot_data->len = len;
227 /* Add back the offset of item2 to the newly created */
228 if (item2->ot_data->offset > 0)
231 for (i = 0 ; i < (int) item2->ot_data->len ; i++, itr++)
233 /* This must be > 0, just because this is how it works */
234 itr->source_cluster += item2->ot_data->offset -
235 item1->ot_data->offset;
241 evas_common_font_ot_populate_text_props(void *_fn, const Eina_Unicode *text,
242 Evas_Text_Props *props, int len)
244 RGBA_Font *fn = (RGBA_Font *) _fn;
247 hb_glyph_position_t *positions;
248 hb_glyph_info_t *infos;
251 if (!evas_common_font_ot_is_enabled()) return EINA_TRUE;
254 evas_common_font_ot_props_unref(props->ot_data);
256 props->ot_data = calloc(1, sizeof(Evas_Font_OT_Data));
257 props->ot_data->refcount = 1;
259 fi = fn->fonts->data;
260 /* Load the font needed for this script */
262 /* Skip common chars */
263 const Eina_Unicode *tmp;
266 evas_common_language_char_script_get(*tmp) == EVAS_SCRIPT_COMMON ;
269 if (!*tmp && (tmp > text)) tmp--;
270 evas_common_font_glyph_search(fn, &fi, *tmp);
272 evas_common_font_int_reload(fi);
273 if (fi->src->current_size != fi->size)
276 FT_Activate_Size(fi->ft.size);
278 fi->src->current_size = fi->size;
283 slen = eina_unicode_strlen(text);
290 buffer = hb_buffer_create(slen);
291 hb_buffer_set_unicode_funcs(buffer, evas_common_language_unicode_funcs_get());
292 hb_buffer_set_language(buffer, hb_language_from_string(
293 evas_common_language_from_locale_get()));
294 hb_buffer_set_script(buffer, props->script);
295 hb_buffer_set_direction(buffer,
296 (props->bidi.dir == EVAS_BIDI_DIRECTION_RTL) ?
297 HB_DIRECTION_RTL : HB_DIRECTION_LTR);
298 /* FIXME: add run-time conversions if needed, which is very unlikely */
299 hb_buffer_add_utf32(buffer, (const uint32_t *) text, slen, 0, slen);
301 _evas_common_font_ot_shape(buffer, fi->src);
303 props->ot_data->len = hb_buffer_get_length(buffer);
304 props->ot_data->items = calloc(props->ot_data->len,
305 sizeof(Evas_Font_OT_Data_Item));
306 positions = hb_buffer_get_glyph_positions(buffer);
307 infos = hb_buffer_get_glyph_infos(buffer);
308 for (i = 0 ; i < props->ot_data->len ; i++)
310 props->ot_data->items[i].index = infos[i].codepoint;
311 props->ot_data->items[i].source_cluster = infos[i].cluster;
312 props->ot_data->items[i].x_advance = positions[i].x_advance;
313 props->ot_data->items[i].x_offset = positions[i].x_offset;
314 props->ot_data->items[i].y_offset = positions[i].y_offset;
317 hb_buffer_destroy(buffer);
318 evas_common_font_int_use_trim();
324 evas_common_font_ot_props_ref(Evas_Font_OT_Data *data)
330 evas_common_font_ot_props_unref(Evas_Font_OT_Data *data)
333 if (--data->refcount == 0)