[meta] hb_ot_metadata_get_entries, tags iteration API
diff --git a/src/hb-ot-meta-table.hh b/src/hb-ot-meta-table.hh
index d36c3e9..7d60c76 100644
--- a/src/hb-ot-meta-table.hh
+++ b/src/hb-ot-meta-table.hh
@@ -42,6 +42,8 @@
{
int cmp (hb_tag_t a) const { return tag.cmp (a); }
+ hb_tag_t get_tag () const { return tag; }
+
hb_blob_t *reference_entry (hb_blob_t *meta_blob) const
{ return hb_blob_create_sub_blob (meta_blob, dataZ, dataLength); }
@@ -76,6 +78,21 @@
hb_blob_t *reference_entry (hb_tag_t tag) const
{ return table->dataMaps.lsearch (tag, Null (DataMap)).reference_entry (table.get_blob ()); }
+ unsigned int get_entries (unsigned int start_offset,
+ unsigned int *count,
+ hb_ot_metadata_t *entries) const
+ {
+ unsigned int entries_count = table->dataMaps.len;
+ if (count && *count)
+ {
+ unsigned int len = hb_min (entries_count - start_offset, *count);
+ for (unsigned int i = 0; i < len; i++)
+ entries[i] = (hb_ot_metadata_t) table->dataMaps[i + start_offset].get_tag ();
+ *count = len;
+ }
+ return table->dataMaps.len;
+ }
+
private:
hb_blob_ptr_t<meta> table;
};
diff --git a/src/hb-ot-metadata.cc b/src/hb-ot-metadata.cc
index 42153be..8ad602a 100644
--- a/src/hb-ot-metadata.cc
+++ b/src/hb-ot-metadata.cc
@@ -38,9 +38,29 @@
**/
/**
- * hb_ot_meta_reference_entry:
+ * hb_ot_metadata_reference_entry:
+ * @face: a face object
+ * @start_offset: iteration's start offset
+ * @entries_count:(inout) (allow-none): buffer size as input, filled size as output
+ * @entries: (out caller-allocates) (array length=entries_count): entries tags buffer
+ *
+ * Return value: Number of all available feature types.
+ *
+ * Since: REPLACEME
+ **/
+unsigned int
+hb_ot_metadata_get_entries (hb_face_t *face,
+ unsigned int start_offset,
+ unsigned int *entries_count, /* IN/OUT. May be NULL. */
+ hb_ot_metadata_t *entries /* OUT. May be NULL. */)
+{
+ return face->table.meta->get_entries (start_offset, entries_count, entries);
+}
+
+/**
+ * hb_ot_metadata_reference_entry:
* @face: a #hb_face_t object.
- * @meta_tag: tag of metadata you like to have.
+ * @metadata_tag: tag of metadata you like to have.
*
* It fetches metadata entry of a given tag from a font.
*
@@ -49,9 +69,9 @@
* Since: REPLACEME
**/
hb_blob_t *
-hb_ot_metadata_reference_entry (hb_face_t *face, hb_ot_metadata_t meta_tag)
+hb_ot_metadata_reference_entry (hb_face_t *face, hb_ot_metadata_t metadata_tag)
{
- return face->table.meta->reference_entry (meta_tag);
+ return face->table.meta->reference_entry (metadata_tag);
}
#endif
diff --git a/src/hb-ot-metadata.h b/src/hb-ot-metadata.h
index 3654458..5d26e1d 100644
--- a/src/hb-ot-metadata.h
+++ b/src/hb-ot-metadata.h
@@ -49,8 +49,14 @@
HB_OT_METADATA_SUPPORTED_LANGUAGES = HB_TAG ('s','l','n','g')
} hb_ot_metadata_t;
+HB_EXTERN unsigned int
+hb_ot_metadata_get_entries (hb_face_t *face,
+ unsigned int start_offset,
+ unsigned int *entries_count, /* IN/OUT. May be NULL. */
+ hb_ot_metadata_t *entries /* OUT. May be NULL. */);
+
HB_EXTERN hb_blob_t *
-hb_ot_metadata_reference_entry (hb_face_t *face, hb_ot_metadata_t tag);
+hb_ot_metadata_reference_entry (hb_face_t *face, hb_ot_metadata_t metadata_tag);
HB_END_DECLS
diff --git a/test/api/test-ot-metadata.c b/test/api/test-ot-metadata.c
index d5f9224..f0e633e 100644
--- a/test/api/test-ot-metadata.c
+++ b/test/api/test-ot-metadata.c
@@ -29,6 +29,31 @@
/* Unit tests for hb-ot-metadata.h */
static void
+test_ot_metadata_get_entries (void)
+{
+ hb_face_t *face = hb_test_open_font_file ("fonts/meta.ttf");
+ hb_ot_metadata_t entries[2];
+
+ unsigned int entries_count = 2;
+ g_assert_cmpint (hb_ot_metadata_get_entries (face, 0, &entries_count, entries), ==, 5);
+ g_assert_cmpint (entries_count, ==, 2);
+ g_assert_cmpint (entries[0], ==, HB_TAG ('a','p','p','l'));
+ g_assert_cmpint (entries[1], ==, HB_TAG ('b','i','l','d'));
+
+ entries_count = 1;
+ g_assert_cmpint (hb_ot_metadata_get_entries (face, 2, &entries_count, entries), ==, 5);
+ g_assert_cmpint (entries_count, ==, 1);
+ g_assert_cmpint (entries[0], ==, HB_TAG ('d','l','n','g'));
+
+ entries_count = 2;
+ g_assert_cmpint (hb_ot_metadata_get_entries (face, 4, &entries_count, entries), ==, 5);
+ g_assert_cmpint (entries_count, ==, 1);
+ g_assert_cmpint (entries[0], ==, HB_TAG ('s','l','n','g'));
+
+ hb_face_destroy (face);
+}
+
+static void
test_ot_metadata_reference_entry (void)
{
hb_face_t *face = hb_test_open_font_file ("fonts/meta.ttf");
@@ -53,6 +78,7 @@
main (int argc, char **argv)
{
hb_test_init (&argc, &argv);
+ hb_test_add (test_ot_metadata_get_entries);
hb_test_add (test_ot_metadata_reference_entry);
return hb_test_run ();
}
