Output resolved fonts in debug config

kitty/core_text.m

@@ -808,6 +808,13 @@ get_variable_data(CTFace *self) {
     size_t table_len = cftable ? CFDataGetLength(cftable) : 0;
     return read_fvar_font_table(table, table_len, self->name_lookup_table);
 }
+
+static PyObject*
+identify_for_debug(CTFace *self) {
+    return PyUnicode_FromFormat("%V: %V", self->postscript_name, "[psname]", self->path, "[path]");
+}
+
+
 // }}}
 
 
@@ -822,6 +829,7 @@ display_name(CTFace *self) {
 static PyMethodDef methods[] = {
     METHODB(display_name, METH_NOARGS),
     METHODB(get_variable_data, METH_NOARGS),
+    METHODB(identify_for_debug, METH_NOARGS),
     METHODB(get_best_name, METH_O),
     {NULL}  /* Sentinel */
 };

kitty/debug_config.py

@@ -17,7 +17,7 @@ from kittens.tui.operations import colored, styled
 from .child import cmdline_of_pid
 from .cli import version
 from .constants import extensions_dir, is_macos, is_wayland, kitty_base_dir, kitty_exe, shell_path
-from .fast_data_types import Color, SingleKey, num_users, opengl_version_string, wayland_compositor_data
+from .fast_data_types import Color, SingleKey, current_fonts, num_users, opengl_version_string, wayland_compositor_data
 from .options.types import Options as KittyOpts
 from .options.types import defaults
 from .options.utils import KeyboardMode, KeyDefinition
@@ -257,6 +257,10 @@ def debug_config(opts: KittyOpts) -> str:
         p('Running under:', green(compositor_name()))
     p(green('OpenGL:'), opengl_version_string())
     p(green('Frozen:'), 'True' if getattr(sys, 'frozen', False) else 'False')
+    p(green('Fonts:'))
+    for k, font in current_fonts().items():
+        if hasattr(font, 'identify_for_debug'):
+            p(yellow(f'  {k}:'), font.identify_for_debug())
     p(green('Paths:'))
     p(yellow('  kitty:'), os.path.realpath(kitty_exe()))
     p(yellow('  base dir:'), kitty_base_dir)

kitty/fast_data_types.pyi

@@ -420,6 +420,7 @@ def fc_match_postscript_name(
 class Face:
     def __init__(self, descriptor: Optional[FontConfigPattern] = None, path: str = '', index: int = 0): ...
     def get_variable_data(self) -> VariableData: ...
+    def identify_for_debug(self) -> str: ...
 
 
 class CoreTextFont(TypedDict):
@@ -445,6 +446,7 @@ class CoreTextFont(TypedDict):
 class CTFace:
     def __init__(self, descriptor: Optional[CoreTextFont] = None, path: str = ''): ...
     def get_variable_data(self) -> VariableData: ...
+    def identify_for_debug(self) -> str: ...
 
 
 def coretext_all_fonts() -> Tuple[CoreTextFont, ...]:

kitty/freetype.c

@@ -691,7 +691,7 @@ render_glyphs_in_cells(PyObject *f, bool bold, bool italic, hb_glyph_info_t *inf
 }
 
 static PyObject*
-display_name(PyObject *s, PyObject *a UNUSED) {
+postscript_name(PyObject *s, PyObject *a UNUSED) {
     Face *self = (Face*)s;
     const char *psname = FT_Get_Postscript_Name(self->face);
     if (psname) return Py_BuildValue("s", psname);
@@ -699,6 +699,12 @@ display_name(PyObject *s, PyObject *a UNUSED) {
     return self->path;
 }
 
+static PyObject*
+identify_for_debug(PyObject *s, PyObject *a UNUSED) {
+    Face *self = (Face*)s;
+    return PyUnicode_FromFormat("%s: %V:%d", FT_Get_Postscript_Name(self->face), self->path, "[path]", self->instance.val);
+}
+
 static PyObject*
 extra_data(PyObject *self, PyObject *a UNUSED) {
     return PyLong_FromVoidPtr(((Face*)self)->extra_data);
@@ -862,7 +868,8 @@ static PyMemberDef members[] = {
 };
 
 static PyMethodDef methods[] = {
-    METHODB(display_name, METH_NOARGS),
+    METHODB(postscript_name, METH_NOARGS),
+    METHODB(identify_for_debug, METH_NOARGS),
     METHODB(extra_data, METH_NOARGS),
     METHODB(get_variable_data, METH_NOARGS),
     METHODB(get_best_name, METH_O),