organicmaps/harfbuzz
13
Fork 0
mirror of https://github.com/harfbuzz/harfbuzz.git synced 2025-04-04 13:05:04 +00:00
Code Issues 1 Projects Releases Wiki Activity Actions 7

[face] Add HB_FACE_LOADER env var

Browse source
This commit is contained in:
Behdad Esfahbod 2025-03-09 01:40:23 -07:00
parent 9d05b03f83
commit 6b9d9f7259
2 changed files with 34 additions and 20 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

17
perf/hb-benchmark.hh
View file

@ -56,22 +56,7 @@ static inline hb_face_t *
hb_benchmark_face_create_from_file_or_fail (const char *font_path,
unsigned face_index)
{
const char *loader = getenv ("HB_FACE_LOADER");
if (loader && !*loader)
loader = nullptr;
#ifdef HAVE_FREETYPE
if (loader && !strcmp (loader, "ft"))
return hb_ft_face_create_from_file_or_fail (font_path, face_index);
#endif
#ifdef HAVE_CORETEXT
if (loader && !strcmp (loader, "coretext"))
return hb_coretext_face_create_from_file_or_fail (font_path, face_index);
#endif
if (!loader || !strcmp (loader, "ot"))
return hb_face_create_from_file_or_fail (font_path, face_index);
assert (false);
return hb_face_create_from_file_or_fail_using (font_path, face_index, nullptr);
}
HB_END_DECLS

37
src/hb-face.cc
View file

@ -352,6 +352,10 @@ static struct supported_face_loaders_t {
* A thin wrapper around the face loader functions registered with HarfBuzz.
* If @loader_name is `NULL`, the first available loader is used.
*
* For example, the FreeType ("ft") loader might be able to load
* .woff and .woff2 files if FreeType is built with those features,
* whereas the OpenType ("ot") loader will not.
*
* Return value: (transfer full): The new face object, or `NULL` if
* the file cannot be read or the loader fails to load the face.
*
@ -360,15 +364,40 @@ static struct supported_face_loaders_t {
hb_face_t *
hb_face_create_from_file_or_fail_using (const char *file_name,
unsigned int index,
const char *loader_name)
const char *name)
{
if (loader_name && !*loader_name)
loader_name = nullptr;
bool retry = false;
if (!name || !*name)
{
static hb_atomic_ptr_t<const char> static_funcs_name;
name = static_funcs_name.get_acquire ();
if (!name)
{
name = getenv ("HB_FACE_LOADER");
if (!name)
name = "";
if (!static_funcs_name.cmpexch (nullptr, name))
name = static_funcs_name.get_acquire ();
}
retry = true;
}
if (name && !*name) name = nullptr;
retry:
for (unsigned i = 0; i < ARRAY_LENGTH (supported_face_loaders); i++)
{
if (!loader_name || !strcmp (supported_face_loaders[i].name, loader_name))
if (!name || !strcmp (supported_face_loaders[i].name, name))
return supported_face_loaders[i].func (file_name, index);
}
if (retry)
{
retry = false;
name = nullptr;
goto retry;
}
return nullptr;
}