[the-board] [main] Disable font mipmapping and AA antialias

[Lucas Rocha <lucasr src gnome org>]

commit 2a04c5acacf39b3f1dabc580b3a0201e7c6fac62
Author: Lucas Rocha <lucasr gnome org>
Date:   Fri Jan 21 23:21:39 2011 +0000

    [main] Disable font mipmapping and AA antialias

 src/main.c |   56 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 56 insertions(+), 0 deletions(-)
---
diff --git a/src/main.c b/src/main.c
index 204ed5b..b77952d 100644
--- a/src/main.c
+++ b/src/main.c
@@ -9,6 +9,7 @@
 
 #include <gjs/gjs.h>
 
+#include <gtk/gtk.h>
 #include <clutter/clutter.h>
 #include <clutter-gtk/clutter-gtk.h>
 #include <clutter-gst/clutter-gst.h>
@@ -32,10 +33,50 @@ parse_options (int *argc, char ***argv)
   g_option_context_free (ctx);
 }
 
+static void
+update_font_options (GtkSettings *settings)
+{
+  ClutterBackend *backend;
+  const cairo_font_options_t *options;
+  cairo_antialias_t antialias_mode;
+  gint antialias;
+
+  /* Disable text mipmapping; it causes problems on pre-GEM Intel
+   * drivers and we should just be rendering text at the right
+   * size rather than scaling it. If we do effects where we dynamically
+   * zoom labels, then we might want to reconsider. */
+  clutter_set_font_flags (clutter_get_font_flags () & ~CLUTTER_FONT_MIPMAPPING);
+
+  backend = clutter_get_default_backend ();
+  options = clutter_backend_get_font_options (backend);
+
+  g_object_get (settings,
+                "gtk-xft-antialias", &antialias,
+                NULL);
+
+  /* We don't want to turn on subpixel anti-aliasing; since Clutter
+   * doesn't currently have the code to support ARGB masks,
+   * generating them then squashing them back to A8 is pointless. */
+  antialias_mode = (antialias < 0 || antialias) ? CAIRO_ANTIALIAS_GRAY
+                                                : CAIRO_ANTIALIAS_NONE;
+
+  cairo_font_options_set_antialias ((cairo_font_options_t *) options,
+                                    antialias_mode);
+}
+
+static void
+settings_notify_cb (GtkSettings *settings,
+                    GParamSpec  *pspec,
+                    gpointer     data)
+{
+  update_font_options (settings);
+}
+
 int
 main (int argc, char **argv)
 {
   GjsContext *js_context;
+  GtkSettings *settings;
   GError *error;
 
   gtk_clutter_init (&argc, &argv);
@@ -45,6 +86,21 @@ main (int argc, char **argv)
 
   js_context = gjs_context_new_with_search_path (NULL);
 
+  settings = gtk_settings_get_default ();
+
+  g_object_connect (settings,
+                    "signal::notify::gtk-xft-dpi",
+                    G_CALLBACK (settings_notify_cb), NULL,
+                    "signal::notify::gtk-xft-antialias",
+                    G_CALLBACK (settings_notify_cb), NULL,
+                    "signal::notify::gtk-xft-hinting",
+                    G_CALLBACK (settings_notify_cb), NULL,
+                    "signal::notify::gtk-xft-hintstyle",
+                    G_CALLBACK (settings_notify_cb), NULL,
+                    NULL);
+
+  update_font_options (settings);
+
   error = NULL;
 
   if (!gjs_context_eval (js_context,