i added an attribute to FbWindow to mark windows which are only used as

"carrier" (maybe a temporarly name?) ... carriers dont need background-updates
.. ever.

this leads to a big performance"boost" over the last commits. before we
updated also the windows which are the hosts for the apps (m_window and
        m_clientarea in FbWinFrame) -> bad idea.

2 files changed, 16 insertions, 6 deletions

diff --git a/src/FbTk/FbWindow.cc b/src/FbTk/FbWindow.cc
index 5a6417f..d3a7736 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_lastbg_color_set(false), m_lastbg_color(0), m_lastbg_pm(0), m_renderer(0), m_is_carrier(false) {
 
 }
 
@@ -58,7 +58,8 @@ 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_lastbg_pm(0), m_renderer(the_copy.m_renderer),
+                                             m_is_carrier(false) {
     the_copy.m_window = 0;
 }
 
@@ -76,7 +77,7 @@ 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_lastbg_pm(0), m_renderer(0), m_is_carrier(false) {
 
     create(RootWindow(display(), screen_num),
            x, y, width, height, eventmask,
@@ -93,7 +94,7 @@ 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_lastbg_pm(0), m_renderer(0), m_is_carrier(false) {
 
     create(parent.window(), x, y, width, height, eventmask,
            override_redirect, save_unders, depth, class_type);
@@ -110,7 +111,7 @@ 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_lastbg_pm(0), m_renderer(0), m_is_carrier(false) {
 
     setNew(client);
 }
@@ -150,10 +151,14 @@ 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;
 
diff --git a/src/FbTk/FbWindow.hh b/src/FbTk/FbWindow.hh
index b08df5e..a630f4f 100644
--- a/src/FbTk/FbWindow.hh
+++ b/src/FbTk/FbWindow.hh
@@ -187,6 +187,9 @@ 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);
 
@@ -221,6 +224,8 @@ private:
     Pixmap m_lastbg_pm;
 
     FbWindowRenderer *m_renderer;
+
+    bool m_is_carrier;
 };
 
 bool operator == (Window win, const FbWindow &fbwin);