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Code to read features from GSUB/GPOS tables

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Kovid Goyal
2024-05-23 10:39:42 +05:30
parent d7702547cf
commit 0f76d3e13b
6 changed files with 78 additions and 7 deletions
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26
kitty/freetype.c
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@@ -842,6 +842,31 @@ get_variation(Face *self, PyObject *a UNUSED) {
Py_INCREF(ans); return ans;
}
static PyObject*
get_features(Face *self, PyObject *a UNUSED) {
FT_Error err;
FT_ULong length = 0;
RAII_PyObject(output, PyFrozenSet_New(NULL)); if (!output) return NULL;
if ((err = FT_Load_Sfnt_Table(self->face, FT_MAKE_TAG('G', 'S', 'U', 'B'), 0, NULL, &length)) == 0) {
RAII_ALLOC(uint8_t, table, malloc(length));
if (!table) return PyErr_NoMemory();
if ((err = FT_Load_Sfnt_Table(self->face, FT_MAKE_TAG('G', 'S', 'U', 'B'), 0, table, &length))) {
set_freetype_error("Failed to load the GSUB table from font with error:", err); return NULL;
}
if (!read_features_from_font_table(table, length, output)) return NULL;
}
length = 0;
if ((err = FT_Load_Sfnt_Table(self->face, FT_MAKE_TAG('G', 'P', 'O', 'S'), 0, NULL, &length)) == 0) {
RAII_ALLOC(uint8_t, table, malloc(length));
if (!table) return PyErr_NoMemory();
if ((err = FT_Load_Sfnt_Table(self->face, FT_MAKE_TAG('G', 'P', 'O', 'S'), 0, table, &length))) {
set_freetype_error("Failed to load the GSUB table from font with error:", err); return NULL;
}
if (!read_features_from_font_table(table, length, output)) return NULL;
}
Py_INCREF(output); return output;
}
static PyObject*
get_variable_data(Face *self, PyObject *a UNUSED) {
if (!ensure_name_table(self)) return NULL;
@@ -992,6 +1017,7 @@ static PyMethodDef methods[] = {
METHODB(identify_for_debug, METH_NOARGS),
METHODB(extra_data, METH_NOARGS),
METHODB(get_variable_data, METH_NOARGS),
METHODB(get_features, METH_NOARGS),
METHODB(get_variation, METH_NOARGS),
METHODB(get_best_name, METH_O),
METHODB(set_size, METH_VARARGS),