organicmaps/harfbuzz
13
Fork 0
mirror of https://github.com/harfbuzz/harfbuzz.git synced 2025-04-15 01:18:13 +00:00
Code Issues 1 Projects Releases Wiki Activity Actions

[hb-ft] Implement get_table_tags func

Browse source 
Part of https://github.com/harfbuzz/harfbuzz/issues/4821
This commit is contained in:
Behdad Esfahbod 2024-08-06 11:27:37 -06:00
parent 76770eb00f
commit 830326fe14
1 changed files with 40 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

40
src/hb-ft.cc
View file

@ -1104,6 +1104,45 @@ _hb_ft_reference_table (hb_face_t *face HB_UNUSED, hb_tag_t tag, void *user_data
buffer, hb_free);
}
static unsigned
_hb_ft_get_table_tags (const hb_face_t *face HB_UNUSED,
unsigned int start_offset,
unsigned int *table_count,
hb_tag_t *table_tags,
void *user_data)
{
FT_Face ft_face = (FT_Face) user_data;
FT_ULong population = 0;
FT_Sfnt_Table_Info (ft_face,
0, // table_index; ignored
nullptr,
&population);
if (!table_count)
return population;
else
*table_count = 0;
if (unlikely (start_offset >= population))
return population;
unsigned end_offset = hb_min (start_offset + *table_count, (unsigned) population);
if (unlikely (end_offset < start_offset))
return population;
*table_count = end_offset - start_offset;
for (unsigned i = start_offset; i < end_offset; i++)
{
FT_ULong tag = 0, length;
FT_Sfnt_Table_Info (ft_face, i, &tag, &length);
table_tags[i - start_offset] = tag;
}
return population;
}
/**
* hb_ft_face_create:
* @ft_face: (destroy destroy) (scope notified): FT_Face to work upon
@ -1145,6 +1184,7 @@ hb_ft_face_create (FT_Face ft_face,
hb_blob_destroy (blob);
} else {
face = hb_face_create_for_tables (_hb_ft_reference_table, ft_face, destroy);
hb_face_set_get_table_tags_func (face, _hb_ft_get_table_tags, ft_face, nullptr);
}
hb_face_set_index (face, ft_face->face_index);