Make the showcase output a little nicer

kitty/core_text.m

@@ -308,6 +308,12 @@ repr(Face *self) {
     );
 }
 
+static PyObject*
+display_name(Face *self) {
+#define R(x) if (self->x) { Py_INCREF(self->x); return self->x; }
+    R(full_name); R(postscript_name); R(family_name); R(path);
+#undef R
+}
 
 // Boilerplate {{{
 

kitty/fonts.c

@@ -657,6 +657,33 @@ concat_cells(PyObject UNUSED *self, PyObject *args) {
     return ans;
 }
 
+static PyObject*
+current_fonts(PyObject UNUSED *self) {
+    PyObject *ans = PyDict_New();
+    if (!ans) return NULL;
+#define SET(key, val) {if (PyDict_SetItemString(ans, #key, val) != 0) { goto error; }}
+    SET(medium, medium_font.face);
+    if (bold_font.face) SET(bold, bold_font.face);
+    if (italic_font.face) SET(italic, italic_font.face);
+    if (bi_font.face) SET(bi, bi_font.face);
+    int num = 0;
+    while (fallback_fonts[num].face) num++;
+    PyObject *ff = PyTuple_New(num);
+    if (!ff) goto error;
+    num = 0;
+    while (fallback_fonts[num].face) {
+        Py_INCREF(fallback_fonts[num].face);
+        PyTuple_SET_ITEM(ff, num, fallback_fonts[num].face);
+        num++;
+    }
+    SET(fallback, ff);
+    Py_CLEAR(ff);
+    return ans;
+error:
+    Py_CLEAR(ans); return NULL;
+#undef SET
+}
+
 static PyMethodDef module_methods[] = {
     METHODB(set_font_size, METH_VARARGS),
     METHODB(set_font, METH_VARARGS),
@@ -666,6 +693,7 @@ static PyMethodDef module_methods[] = {
     METHODB(test_sprite_position_for, METH_VARARGS),
     METHODB(concat_cells, METH_VARARGS),
     METHODB(set_send_sprite_to_gpu, METH_O),
+    METHODB(current_fonts, METH_NOARGS),
     METHODB(test_render_line, METH_VARARGS),
     {NULL, NULL, 0, NULL}        /* Sentinel */
 };

kitty/fonts/render.py

@@ -180,7 +180,7 @@ def render_box_drawing(codepoint):
 
 def test_render_string(text='Hello, world!', family='monospace', size=144.0, dpi=96.0):
     from tempfile import NamedTemporaryFile
-    from kitty.fast_data_types import concat_cells, set_send_sprite_to_gpu, Screen, sprite_map_set_limits, test_render_line
+    from kitty.fast_data_types import concat_cells, set_send_sprite_to_gpu, Screen, sprite_map_set_limits, test_render_line, current_fonts
     from kitty.icat import detect_support, show
     if not detect_support():
         raise SystemExit('Your terminal does not support the graphics protocol')
@@ -208,12 +208,16 @@ def test_render_string(text='Hello, world!', family='monospace', size=144.0, dpi
     rgb_data = concat_cells(cell_width, cell_height, tuple(cells))
     with NamedTemporaryFile(delete=False) as f:
         f.write(rgb_data)
-    print('Rendered string {!r} below, with font: {}'.format(text, family))
+    cf = current_fonts()
+    fonts = [cf['medium'].display_name()]
+    fonts.extend(f.display_name() for f in cf['fallback'])
+    print('Rendered string {} below, with fonts: {}'.format(text, ', '.join(fonts)))
     show(f.name, cell_width * len(cells), cell_height, 24)
     print('\n')
 
 
 def showcase():
-    test_render_string('He\u0347\u0305llo\u0341, w\u0302or\u0306l\u0354d!', family='Consolas')
+    test_render_string('He\u0347\u0305llo\u0341, w\u0302or\u0306l\u0354d!', family='Noto Sans Mono')
-    test_render_string('你好,世界')
+    test_render_string('你好,世界', family='Noto Sans Mono')
+    test_render_string('|\U0001F929|\U0001F921|\U0001F91f|', family='Noto Sans Mono')
     test_render_string('A=>>B!=C', family='Fira Code Medium')

kitty/freetype.c

@@ -301,6 +301,14 @@ render_glyphs_in_cells(PyObject *f, bool bold, bool italic, hb_glyph_info_t *inf
     return true;
 }
 
+static PyObject*
+display_name(Face *self) {
+    const char *psname = FT_Get_Postscript_Name(self->face);
+    if (psname) return Py_BuildValue("s", psname);
+    Py_INCREF(self->path);
+    return self->path;
+}
+
 // Boilerplate {{{
 
 static PyMemberDef members[] = {
@@ -319,6 +327,7 @@ static PyMemberDef members[] = {
 };
 
 static PyMethodDef methods[] = {
+    METHODB(display_name, METH_NOARGS),
     {NULL}  /* Sentinel */
 };