Add clutter-frame-source to the repository to fix the build

clutter/clutter-frame-source.c

@@ -0,0 +1,156 @@
+/*
+ * Clutter.
+ *
+ * An OpenGL based 'interactive canvas' library.
+ *
+ * Authored By Matthew Allum  <mallum@openedhand.com>
+ *
+ * Copyright (C) 2008 OpenedHand
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "clutter-frame-source.h"
+
+typedef struct _ClutterFrameSource ClutterFrameSource;
+
+struct _ClutterFrameSource
+{
+  GSource source;
+
+  GTimeVal start_time;
+  guint last_time, frame_time;
+};
+
+static gboolean clutter_frame_source_prepare  (GSource *source, gint *timeout);
+static gboolean clutter_frame_source_check    (GSource *source);
+static gboolean clutter_frame_source_dispatch (GSource    *source,
+					       GSourceFunc callback,
+					       gpointer    user_data);
+
+static GSourceFuncs clutter_frame_source_funcs = 
+  {
+    clutter_frame_source_prepare,
+    clutter_frame_source_check,
+    clutter_frame_source_dispatch,
+    NULL
+  };
+
+guint
+clutter_frame_source_add_full (gint           priority,
+			       guint          interval,
+			       GSourceFunc    function,
+			       gpointer       data,
+			       GDestroyNotify notify)
+{
+  guint ret;
+  GSource *source = g_source_new (&clutter_frame_source_funcs,
+				  sizeof (ClutterFrameSource));
+  ClutterFrameSource *frame_source = (ClutterFrameSource *) source;
+
+  frame_source->last_time = 0;
+  frame_source->frame_time = interval;
+  g_get_current_time (&frame_source->start_time);
+
+  if (priority != G_PRIORITY_DEFAULT)
+    g_source_set_priority (source, priority);
+
+  g_source_set_callback (source, function, data, notify);
+
+  ret = g_source_attach (source, NULL);
+
+  g_source_unref (source);
+
+  return ret;
+}
+
+guint
+clutter_frame_source_add (guint          interval,
+			  GSourceFunc    function,
+			  gpointer       data)
+{
+  return clutter_frame_source_add_full (G_PRIORITY_DEFAULT,
+					interval, function, data, NULL);
+}
+
+static guint
+clutter_frame_source_get_ticks (ClutterFrameSource *frame_source)
+{
+  GTimeVal time_now;
+
+  g_source_get_current_time ((GSource *) frame_source, &time_now);
+  
+  return (time_now.tv_sec - frame_source->start_time.tv_sec) * 1000
+    + (time_now.tv_usec - frame_source->start_time.tv_usec) / 1000;
+}
+
+static gboolean
+clutter_frame_source_prepare (GSource *source, gint *timeout)
+{
+  ClutterFrameSource *frame_source = (ClutterFrameSource *) source;
+
+  guint now = clutter_frame_source_get_ticks (frame_source);
+
+  /* If time has gone backwards or the time since the last frame is
+     greater than the two frames worth then reset the time and do a
+     frame now */
+  if (frame_source->last_time > now || now - frame_source->last_time
+      > frame_source->frame_time * 2)
+    {
+      frame_source->last_time = now - frame_source->frame_time;
+      if (timeout)
+	*timeout = 0;
+      return TRUE;
+    }
+  else if (now - frame_source->last_time >= frame_source->frame_time)
+    {
+      if (timeout)
+	*timeout = 0;
+      return TRUE;
+    }
+  else
+    {
+      if (timeout)
+	*timeout = frame_source->frame_time + frame_source->last_time - now;
+      return FALSE;
+    }
+}
+
+static gboolean
+clutter_frame_source_check (GSource *source)
+{
+  return clutter_frame_source_prepare (source, NULL);
+}
+
+static gboolean
+clutter_frame_source_dispatch (GSource     *source,
+			       GSourceFunc callback,
+			       gpointer    user_data)
+{
+  ClutterFrameSource *frame_source = (ClutterFrameSource *) source;
+
+  if ((* callback) (user_data))
+  {
+    frame_source->last_time += frame_source->frame_time;
+    return TRUE;
+  }
+  else
+    return FALSE;
+}

clutter/clutter-frame-source.h

@@ -0,0 +1,41 @@
+/*
+ * Clutter.
+ *
+ * An OpenGL based 'interactive canvas' library.
+ *
+ * Authored By Matthew Allum  <mallum@openedhand.com>
+ *
+ * Copyright (C) 2008 OpenedHand
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef _CLUTTER_FRAME_SOURCE_H
+#define _CLUTTER_FRAME_SOURCE_H
+
+#include <glib.h>
+
+guint clutter_frame_source_add (guint          interval,
+				GSourceFunc    function,
+				gpointer       data);
+
+guint clutter_frame_source_add_full (gint           priority,
+				     guint          interval,
+				     GSourceFunc    function,
+				     gpointer       data,
+				     GDestroyNotify notify);
+
+#endif /* _CLUTTER_FRAME_SOURCE_H */