[gtk/wip/fanc999/fontchooser.win32.gtk3: 3/3] demos/font_features.c: Support PangoWin32Font

[Chun-wei Fan <fanchunwei src gnome org>]

commit ea075cabdeebc4bb3a391ef4c756ab205b854229
Author: Chun-wei Fan <fanchunwei src gnome org>
Date:   Mon Jan 7 16:29:24 2019 +0800

    demos/font_features.c: Support PangoWin32Font
    
    Also support PangoWin32Font for the font features demo, which will
    enable running on Windows even if PangoFT support is not enabled or is
    unused.

 demos/gtk-demo/font_features.c | 47 ++++++++++++++++++++++++++++--------------
 1 file changed, 32 insertions(+), 15 deletions(-)
---
diff --git a/demos/gtk-demo/font_features.c b/demos/gtk-demo/font_features.c
index 761bf8f38f..c725610f56 100644
--- a/demos/gtk-demo/font_features.c
+++ b/demos/gtk-demo/font_features.c
@@ -8,12 +8,15 @@
  * and their effect.
  */
 
+#include "config.h"
+
 #include <gtk/gtk.h>
-#include <pango/pangofc-font.h>
 #include <hb.h>
 #include <hb-ot.h>
 #include <hb-ft.h>
 
+#include "gtk/gtkpangofontutilsprivate.h"
+
 static GtkWidget *label;
 static GtkWidget *settings;
 static GtkWidget *font;
@@ -117,18 +120,31 @@ update_display (void)
   g_free (font_settings);
 }
 
-static PangoFont *
+typedef struct
+{
+  PangoContext *context;
+  PangoFontMap *map;
+  PangoFont    *font;
+  gpointer     *ft_extra_items;
+} demo_pango_items;
+
+static demo_pango_items *items = NULL;
+
+static void
 get_pango_font (void)
 {
   PangoFontDescription *desc;
   PangoContext *context;
-  PangoFontMap *map;
+
+  if (items == NULL)
+    items = g_new0 (demo_pango_items, 1);
 
   desc = gtk_font_chooser_get_font_desc (GTK_FONT_CHOOSER (font));
   context = gtk_widget_get_pango_context (font);
-  map = pango_context_get_font_map (context);
+  items->map = pango_context_get_font_map (context);
 
-  return pango_font_map_load_font (map, context, desc);
+  items->font = pango_font_map_load_font (items->map, context, desc);
+  items->ft_extra_items = _gtk_pango_font_init_extra_ft_items (items->font);
 }
 
 static struct { const char *name; hb_script_t script; } script_names[] = {
@@ -208,15 +224,17 @@ update_script_combo (void)
   hb_font_t *hb_font;
   gint i, j, k, l;
   FT_Face ft_face;
-  PangoFont *pango_font;
   GHashTable *tags;
   GHashTableIter iter;
   TagPair *pair;
 
   store = gtk_list_store_new (4, G_TYPE_STRING, G_TYPE_UINT, G_TYPE_UINT, G_TYPE_UINT);
 
-  pango_font = get_pango_font ();
-  ft_face = pango_fc_font_lock_face (PANGO_FC_FONT (pango_font)),
+  get_pango_font ();
+  ft_face = _gtk_pango_font_get_ft_face (items->font,
+                                         items->map,
+                                         items->ft_extra_items);
+
   hb_font = hb_ft_font_create (ft_face, NULL);
 
   tags = g_hash_table_new_full (tag_pair_hash, tag_pair_equal, g_free, NULL);
@@ -267,8 +285,8 @@ update_script_combo (void)
       hb_face_destroy (hb_face);
     }
 
-  pango_fc_font_unlock_face (PANGO_FC_FONT (pango_font));
-  g_object_unref (pango_font);
+  _gtk_pango_font_release_ft_face (items->font, items->ft_extra_items);
+  g_object_unref (items->font);
 
   g_hash_table_iter_init (&iter, tags);
   while (g_hash_table_iter_next (&iter, (gpointer *)&pair, NULL))
@@ -345,7 +363,6 @@ update_features (void)
   GtkTreeModel *model;
   GtkTreeIter iter;
   guint script_index, lang_index;
-  PangoFont *pango_font;
   FT_Face ft_face;
   hb_font_t *hb_font;
 
@@ -363,8 +380,8 @@ update_features (void)
                       2, &lang_index,
                       -1);
 
-  pango_font = get_pango_font ();
-  ft_face = pango_fc_font_lock_face (PANGO_FC_FONT (pango_font)),
+  get_pango_font ();
+  ft_face = _gtk_pango_font_get_ft_face (items->font, items->map, items->ft_extra_items);
   hb_font = hb_ft_font_create (ft_face, NULL);
 
   if (hb_font)
@@ -400,8 +417,8 @@ update_features (void)
       hb_face_destroy (hb_face);
     }
 
-  pango_fc_font_unlock_face (PANGO_FC_FONT (pango_font));
-  g_object_unref (pango_font);
+  _gtk_pango_font_release_ft_face (items->font, items->ft_extra_items);
+  g_object_unref (items->font);
 }
 
 static void