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[util/hb-shape] Cache blob/face in batch mode

This commit is contained in:
Behdad Esfahbod 2021-07-28 19:05:12 -06:00
parent 9a7ff54bb7
commit ad03f34df7
2 changed files with 41 additions and 7 deletions
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41
util/options.cc
View File

@ -681,6 +681,10 @@ output_options_t::add_options (option_parser_t *parser)
}
const char *font_options_t::cached_font_path = nullptr;
hb_blob_t *font_options_t::cached_blob = nullptr;
unsigned font_options_t::cached_face_index = (unsigned) -1;
hb_face_t *font_options_t::cached_face = nullptr;
hb_font_t *
font_options_t::get_font () const
@ -704,14 +708,39 @@ font_options_t::get_font () const
#endif
}
blob = hb_blob_create_from_file_or_fail (font_path);
if (cached_font_path && 0 == strcmp (cached_font_path, font_path))
blob = hb_blob_reference (cached_blob);
else
{
blob = hb_blob_create_from_file_or_fail (font_path);
if (!blob)
fail (false, "%s: Failed reading file", font_path);
if (!blob)
fail (false, "%s: Failed reading file", font_path);
/* Create the face */
hb_face_t *face = hb_face_create (blob, face_index);
hb_blob_destroy (blob);
/* Update caches. */
hb_face_destroy (cached_face);
cached_face = nullptr;
cached_face_index = (unsigned) -1;
free ((char *) cached_font_path);
cached_font_path = strdup (font_path);
hb_blob_destroy (cached_blob);
cached_blob = hb_blob_reference (blob);
}
hb_face_t *face = nullptr;
if (cached_face_index == face_index)
face = hb_face_reference (cached_face);
else
{
face = hb_face_create (blob, face_index);
hb_blob_destroy (blob);
cached_face_index = face_index;
hb_face_destroy (cached_face);
cached_face = hb_face_reference (face);
}
font = hb_font_create (face);

7
util/options.hh
View File

@ -491,7 +491,7 @@ struct font_options_t : option_group_t
char *font_file;
mutable hb_blob_t *blob;
int face_index;
unsigned face_index;
hb_variation_t *variations;
unsigned int num_variations;
int default_font_size;
@ -506,6 +506,11 @@ struct font_options_t : option_group_t
private:
mutable hb_font_t *font;
static const char *cached_font_path;
static hb_blob_t *cached_blob;
static unsigned cached_face_index;
static hb_face_t *cached_face;
};