diff options
| -rw-r--r-- | pango/pango-item-private.h | 5 | ||||
| -rw-r--r-- | pango/pango-item.c | 68 |
2 files changed, 73 insertions, 0 deletions
diff --git a/pango/pango-item-private.h b/pango/pango-item-private.h index 8680fa4b..dd3f89fc 100644 --- a/pango/pango-item-private.h +++ b/pango/pango-item-private.h @@ -68,6 +68,11 @@ G_STATIC_ASSERT (offsetof (PangoItem, length) == offsetof (PangoItemPrivate, len G_STATIC_ASSERT (offsetof (PangoItem, num_chars) == offsetof (PangoItemPrivate, num_chars)); G_STATIC_ASSERT (offsetof (PangoItem, analysis) == offsetof (PangoItemPrivate, analysis)); +void pango_analysis_collect_features (const PangoAnalysis *analysis, + hb_feature_t *features, + guint length, + guint *num_features); + G_END_DECLS #endif /* __PANGO_ITEM_PRIVATE_H__ */ diff --git a/pango/pango-item.c b/pango/pango-item.c index 484d5f1f..4b02c277 100644 --- a/pango/pango-item.c +++ b/pango/pango-item.c @@ -231,3 +231,71 @@ pango_item_apply_attrs (PangoItem *item, item->analysis.extra_attrs = g_slist_concat (item->analysis.extra_attrs, attrs); } + +void +pango_analysis_collect_features (const PangoAnalysis *analysis, + hb_feature_t *features, + guint length, + guint *num_features) +{ + GSList *l; + + pango_font_get_features (analysis->font, features, length, num_features); + + for (l = analysis->extra_attrs; l && *num_features < length; l = l->next) + { + PangoAttribute *attr = l->data; + if (attr->klass->type == PANGO_ATTR_FONT_FEATURES) + { + PangoAttrFontFeatures *fattr = (PangoAttrFontFeatures *) attr; + const gchar *feat; + const gchar *end; + int len; + + feat = fattr->features; + + while (feat != NULL && *num_features < length) + { + end = strchr (feat, ','); + if (end) + len = end - feat; + else + len = -1; + if (hb_feature_from_string (feat, len, &features[*num_features])) + { + features[*num_features].start = attr->start_index; + features[*num_features].end = attr->end_index; + (*num_features)++; + } + + if (end == NULL) + break; + + feat = end + 1; + } + } + } + + /* Turn off ligatures when letterspacing */ + for (l = analysis->extra_attrs; l && *num_features < length; l = l->next) + { + PangoAttribute *attr = l->data; + if (attr->klass->type == PANGO_ATTR_LETTER_SPACING) + { + hb_tag_t tags[] = { + HB_TAG('l','i','g','a'), + HB_TAG('c','l','i','g'), + HB_TAG('d','l','i','g'), + }; + int i; + for (i = 0; i < G_N_ELEMENTS (tags); i++) + { + features[*num_features].tag = tags[i]; + features[*num_features].value = 0; + features[*num_features].start = attr->start_index; + features[*num_features].end = attr->end_index; + (*num_features)++; + } + } + } +} |