[gtk+/wip/frame-synchronization: 20/33] GdkPaintClock: Reverse order of resume-events and afterpaint

[Owen Taylor <otaylor src gnome org>]

commit 9a0c80d9d81913153f41478c4ddb2741ef1135a3
Author: Owen W. Taylor <otaylor fishsoup net>
Date:   Sun Oct 7 11:42:45 2012 -0400

    GdkPaintClock: Reverse order of resume-events and afterpaint
    
    Keeping events paused after the end of a frame put us in a
    weird state where we had to process and queue events - so that
    we would get the message from the compositor - but not deliver
    them. Instead resume events before ending the frame.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=685460

 gdk/gdkpaintclock.h     |    4 +-
 gdk/gdkpaintclockidle.c |  116 +++++++++++++++++++++++------------------------
 2 files changed, 58 insertions(+), 62 deletions(-)
---
diff --git a/gdk/gdkpaintclock.h b/gdk/gdkpaintclock.h
index f2b6b6c..b38d7a8 100644
--- a/gdk/gdkpaintclock.h
+++ b/gdk/gdkpaintclock.h
@@ -70,8 +70,8 @@ typedef enum {
   GDK_PAINT_CLOCK_PHASE_UPDATE        = 1 << 2,
   GDK_PAINT_CLOCK_PHASE_LAYOUT        = 1 << 3,
   GDK_PAINT_CLOCK_PHASE_PAINT         = 1 << 4,
-  GDK_PAINT_CLOCK_PHASE_AFTER_PAINT   = 1 << 5,
-  GDK_PAINT_CLOCK_PHASE_RESUME_EVENTS = 1 << 6
+  GDK_PAINT_CLOCK_PHASE_RESUME_EVENTS = 1 << 5,
+  GDK_PAINT_CLOCK_PHASE_AFTER_PAINT   = 1 << 6
 } GdkPaintClockPhase;
 
 struct _GdkPaintClockInterface
diff --git a/gdk/gdkpaintclockidle.c b/gdk/gdkpaintclockidle.c
index 8d2009d..0f34ea7 100644
--- a/gdk/gdkpaintclockidle.c
+++ b/gdk/gdkpaintclockidle.c
@@ -219,83 +219,79 @@ gdk_paint_clock_paint_idle (void *data)
   skip_to_resume_events =
     (priv->requested & ~(GDK_PAINT_CLOCK_PHASE_FLUSH_EVENTS | GDK_PAINT_CLOCK_PHASE_RESUME_EVENTS)) == 0;
 
-  switch (priv->phase)
+  if (!skip_to_resume_events)
     {
-    case GDK_PAINT_CLOCK_PHASE_FLUSH_EVENTS:
-      break;
-    case GDK_PAINT_CLOCK_PHASE_NONE:
-    case GDK_PAINT_CLOCK_PHASE_BEFORE_PAINT:
-      if (priv->freeze_count == 0)
-	{
-          priv->frame_time = compute_frame_time (clock_idle);
-
-          priv->phase = GDK_PAINT_CLOCK_PHASE_BEFORE_PAINT;
-          /* We always emit ::before-paint and ::after-paint if
-           * any of the intermediate phases are requested and
-           * they don't get repeated if you freeze/thaw while
-           * in them. */
-          if (!skip_to_resume_events)
+      switch (priv->phase)
+        {
+        case GDK_PAINT_CLOCK_PHASE_FLUSH_EVENTS:
+          break;
+        case GDK_PAINT_CLOCK_PHASE_NONE:
+        case GDK_PAINT_CLOCK_PHASE_BEFORE_PAINT:
+          if (priv->freeze_count == 0)
             {
+              priv->frame_time = compute_frame_time (clock_idle);
+
+              priv->phase = GDK_PAINT_CLOCK_PHASE_BEFORE_PAINT;
+
+              /* We always emit ::before-paint and ::after-paint if
+               * any of the intermediate phases are requested and
+               * they don't get repeated if you freeze/thaw while
+               * in them. */
               priv->requested &= ~GDK_PAINT_CLOCK_PHASE_BEFORE_PAINT;
               g_signal_emit_by_name (G_OBJECT (clock), "before-paint");
+              priv->phase = GDK_PAINT_CLOCK_PHASE_UPDATE;
             }
-          priv->phase = GDK_PAINT_CLOCK_PHASE_UPDATE;
-	}
-    case GDK_PAINT_CLOCK_PHASE_UPDATE:
-      if (priv->freeze_count == 0)
-	{
-          if (priv->requested & GDK_PAINT_CLOCK_PHASE_UPDATE)
+        case GDK_PAINT_CLOCK_PHASE_UPDATE:
+          if (priv->freeze_count == 0)
             {
-              priv->requested &= ~GDK_PAINT_CLOCK_PHASE_UPDATE;
-              g_signal_emit_by_name (G_OBJECT (clock), "update");
+              if (priv->requested & GDK_PAINT_CLOCK_PHASE_UPDATE)
+                {
+                  priv->requested &= ~GDK_PAINT_CLOCK_PHASE_UPDATE;
+                  g_signal_emit_by_name (G_OBJECT (clock), "update");
+                }
             }
-	}
-    case GDK_PAINT_CLOCK_PHASE_LAYOUT:
-      if (priv->freeze_count == 0)
-	{
-	  priv->phase = GDK_PAINT_CLOCK_PHASE_LAYOUT;
-          if (priv->requested & GDK_PAINT_CLOCK_PHASE_LAYOUT)
+        case GDK_PAINT_CLOCK_PHASE_LAYOUT:
+          if (priv->freeze_count == 0)
             {
-              priv->requested &= ~GDK_PAINT_CLOCK_PHASE_LAYOUT;
-              g_signal_emit_by_name (G_OBJECT (clock), "layout");
+              priv->phase = GDK_PAINT_CLOCK_PHASE_LAYOUT;
+              if (priv->requested & GDK_PAINT_CLOCK_PHASE_LAYOUT)
+                {
+                  priv->requested &= ~GDK_PAINT_CLOCK_PHASE_LAYOUT;
+                  g_signal_emit_by_name (G_OBJECT (clock), "layout");
+                }
             }
-	}
-    case GDK_PAINT_CLOCK_PHASE_PAINT:
-      if (priv->freeze_count == 0)
-	{
-	  priv->phase = GDK_PAINT_CLOCK_PHASE_PAINT;
-          if (priv->requested & GDK_PAINT_CLOCK_PHASE_PAINT)
+        case GDK_PAINT_CLOCK_PHASE_PAINT:
+          if (priv->freeze_count == 0)
             {
-              priv->requested &= ~GDK_PAINT_CLOCK_PHASE_PAINT;
-              g_signal_emit_by_name (G_OBJECT (clock), "paint");
+              priv->phase = GDK_PAINT_CLOCK_PHASE_PAINT;
+              if (priv->requested & GDK_PAINT_CLOCK_PHASE_PAINT)
+                {
+                  priv->requested &= ~GDK_PAINT_CLOCK_PHASE_PAINT;
+                  g_signal_emit_by_name (G_OBJECT (clock), "paint");
+                }
             }
-	}
-    case GDK_PAINT_CLOCK_PHASE_AFTER_PAINT:
-      if (priv->freeze_count == 0)
-	{
-	  priv->phase = GDK_PAINT_CLOCK_PHASE_AFTER_PAINT;
-          if (!skip_to_resume_events)
+        case GDK_PAINT_CLOCK_PHASE_AFTER_PAINT:
+          if (priv->freeze_count == 0)
             {
               priv->requested &= ~GDK_PAINT_CLOCK_PHASE_AFTER_PAINT;
               g_signal_emit_by_name (G_OBJECT (clock), "after-paint");
+              /* the ::after-paint phase doesn't get repeated on freeze/thaw,
+               */
+              priv->phase = GDK_PAINT_CLOCK_PHASE_NONE;
             }
-          /* the ::after-paint phase doesn't get repeated on freeze/thaw,
-           */
-          priv->phase = GDK_PAINT_CLOCK_PHASE_RESUME_EVENTS;
-	}
-    case GDK_PAINT_CLOCK_PHASE_RESUME_EVENTS:
-      if (priv->freeze_count == 0)
-	{
-          if (priv->requested & GDK_PAINT_CLOCK_PHASE_RESUME_EVENTS)
-            {
-              priv->requested &= ~GDK_PAINT_CLOCK_PHASE_RESUME_EVENTS;
-              g_signal_emit_by_name (G_OBJECT (clock), "resume-events");
-            }
-          /* the ::resume-event phase doesn't get repeated on freeze/thaw */
-	  priv->phase = GDK_PAINT_CLOCK_PHASE_NONE;
-	}
+        case GDK_PAINT_CLOCK_PHASE_RESUME_EVENTS:
+          ;
+        }
     }
 
+  if (priv->requested & GDK_PAINT_CLOCK_PHASE_RESUME_EVENTS)
+    {
+      priv->requested &= ~GDK_PAINT_CLOCK_PHASE_RESUME_EVENTS;
+      g_signal_emit_by_name (G_OBJECT (clock), "resume-events");
+    }
+
+  priv->phase = GDK_PAINT_CLOCK_PHASE_NONE;
+
   if (priv->freeze_count == 0 && priv->requested != 0)
     {
       /* We need to start over again immediately - this implies that there is no