2 files changed, 9 insertions, 19 deletions

diff --git a/src/FbTk/FbWindow.cc b/src/FbTk/FbWindow.cc
index d3a7736..de6b197 100644
--- a/src/FbTk/FbWindow.cc
+++ b/src/FbTk/FbWindow.cc
@@ -46,7 +46,7 @@ namespace FbTk {
 
 FbWindow::FbWindow():FbDrawable(), m_parent(0), m_screen_num(0), m_window(0), m_x(0), m_y(0),
                      m_width(0), m_height(0), m_border_width(0), m_depth(0), m_destroy(true),
-                     m_lastbg_color_set(false), m_lastbg_color(0), m_lastbg_pm(0), m_renderer(0), m_is_carrier(false) {
+                     m_lastbg_color_set(false), m_lastbg_color(0), m_lastbg_pm(0), m_renderer(0) {
 
 }
 
@@ -58,8 +58,7 @@ FbWindow::FbWindow(const FbWindow& the_copy):FbDrawable(),
                                              m_border_width(the_copy.borderWidth()),
                                              m_depth(the_copy.depth()), m_destroy(true),
                                              m_lastbg_color_set(false), m_lastbg_color(0), 
-                                             m_lastbg_pm(0), m_renderer(the_copy.m_renderer),
-                                             m_is_carrier(false) {
+                                             m_lastbg_pm(0), m_renderer(the_copy.m_renderer) {
     the_copy.m_window = 0;
 }
 
@@ -77,7 +76,7 @@ FbWindow::FbWindow(int screen_num,
     m_destroy(true),
     m_lastbg_color_set(false),
     m_lastbg_color(0),
-    m_lastbg_pm(0), m_renderer(0), m_is_carrier(false) {
+    m_lastbg_pm(0), m_renderer(0) {
 
     create(RootWindow(display(), screen_num),
            x, y, width, height, eventmask,
@@ -94,7 +93,7 @@ FbWindow::FbWindow(const FbWindow &parent,
     m_screen_num(parent.screenNumber()),
     m_destroy(true),
     m_lastbg_color_set(false), m_lastbg_color(0),
-    m_lastbg_pm(0), m_renderer(0), m_is_carrier(false) {
+    m_lastbg_pm(0), m_renderer(0) {
 
     create(parent.window(), x, y, width, height, eventmask,
            override_redirect, save_unders, depth, class_type);
@@ -111,7 +110,7 @@ FbWindow::FbWindow(Window client):FbDrawable(), m_parent(0),
                                   m_depth(0),
                                   m_destroy(false),  // don't destroy this window
                                   m_lastbg_color_set(false), m_lastbg_color(0),
-                                  m_lastbg_pm(0), m_renderer(0), m_is_carrier(false) {
+                                  m_lastbg_pm(0), m_renderer(0) {
 
     setNew(client);
 }
@@ -151,14 +150,10 @@ void FbWindow::setBackgroundPixmap(Pixmap bg_pixmap) {
 }
 
 void FbWindow::updateBackground(bool only_if_alpha) {
-    
-    if (isCarrier())
-        return;
-    
     Pixmap newbg = m_lastbg_pm;
     unsigned char alpha = 255;
     bool free_newbg = false;
-    
+
     if (m_lastbg_pm == None && !m_lastbg_color_set)
         return;
 
@@ -168,9 +163,9 @@ void FbWindow::updateBackground(bool only_if_alpha) {
     if (only_if_alpha && alpha == 255) 
         return;
 
-    // still use bg buffer pixmap if transparent
-    // cause it does nice caching things
-    if (m_lastbg_pm != ParentRelative) {
+     // still use bg buffer pixmap if not transparent
+     // cause it does nice caching things, assuming we have a renderer
+     if (m_lastbg_pm != ParentRelative && (m_renderer || alpha != 255)) {
         // update source and destination if needed
         Pixmap root = FbPixmap::getRootPixmap(screenNumber());
         if (alpha != 255 && m_transparent->source() != root)
diff --git a/src/FbTk/FbWindow.hh b/src/FbTk/FbWindow.hh
index a630f4f..b08df5e 100644
--- a/src/FbTk/FbWindow.hh
+++ b/src/FbTk/FbWindow.hh
@@ -187,9 +187,6 @@ public:
     void setRenderer(FbWindowRenderer &renderer) { m_renderer = &renderer; }
     void sendConfigureNotify(int x, int y, unsigned int width, unsigned int height);
 
-    /// this window is basicly a carrier and does not need background-updates
-    void setCarrier(bool flag) { m_is_carrier = flag; }
-    bool isCarrier() const { return m_is_carrier; }
     /// forces full background change, recalcing of alpha values if necessary
     void updateBackground(bool only_if_alpha);
 
@@ -224,8 +221,6 @@ private:
     Pixmap m_lastbg_pm;
 
     FbWindowRenderer *m_renderer;
-
-    bool m_is_carrier;
 };
 
 bool operator == (Window win, const FbWindow &fbwin);