[gnome-shell] st-drawing-area: Avoid unnecessary repaints

[Florian Müllner <fmuellner src gnome org>]

commit 42c736614c7441c43ac04512af2565cd845fb686
Author: Florian Müllner <fmuellner gnome org>
Date:   Fri Oct 15 09:18:37 2010 +0200

    st-drawing-area: Avoid unnecessary repaints
    
    StDrawingArea uses the member variable needs_repaint to keep track
    of whether it needs repainting. The variable is set to TRUE correctly,
    e.g. on allocation or style changes - alas, it is never set to FALSE,
    resulting in the area being repainted continuously.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=632197

 src/st/st-drawing-area.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/st/st-drawing-area.c b/src/st/st-drawing-area.c
index fa99d11..a10da15 100644
--- a/src/st/st-drawing-area.c
+++ b/src/st/st-drawing-area.c
@@ -115,6 +115,7 @@ st_drawing_area_paint (ClutterActor *self)
           surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
           priv->context = cairo_create (surface);
           priv->in_repaint = TRUE;
+          priv->needs_repaint = FALSE;
 
           g_signal_emit ((GObject*)area, st_drawing_area_signals[REPAINT], 0);