Added way to destroy the share widget in the GL graphics system.

This lets us destroy the share widget temporarily if we want to free up
OpenGL resources for a while.

Reviewed-by: Gunnar Sletta

2 files changed, 20 insertions, 0 deletions

diff --git a/src/opengl/qwindowsurface_gl.cpp b/src/opengl/qwindowsurface_gl.cpp
index 6b82ed3..b86fb78 100644
--- a/src/opengl/qwindowsurface_gl.cpp
+++ b/src/opengl/qwindowsurface_gl.cpp
@@ -199,6 +199,7 @@ public:
         return widget;
     }
 
+    // destroys the share widget and prevents recreation
     void cleanup() {
         QGLWidget *w = widget;
         cleanedUp = true;
@@ -206,6 +207,20 @@ public:
         delete w;
     }
 
+    // destroys the share widget, but allows it to be recreated later on
+    void destroy() {
+        if (cleanedUp)
+            return;
+
+        QGLWidget *w = widget;
+
+        // prevent potential recursions
+        cleanedUp = true;
+        widget = 0;
+        delete w;
+        cleanedUp = false;
+    }
+
     static bool cleanedUp;
 
 private:
@@ -233,6 +248,10 @@ QGLWidget* qt_gl_share_widget()
     return _qt_gl_share_widget()->shareWidget();
 }
 
+void qt_destroy_gl_share_widget()
+{
+    _qt_gl_share_widget()->destroy();
+}
 
 struct QGLWindowSurfacePrivate
 {
diff --git a/src/opengl/qwindowsurface_gl_p.h b/src/opengl/qwindowsurface_gl_p.h
index 5e670fe..ffc2e86 100644
--- a/src/opengl/qwindowsurface_gl_p.h
+++ b/src/opengl/qwindowsurface_gl_p.h
@@ -67,6 +67,7 @@ class QWidget;
 struct QGLWindowSurfacePrivate;
 
 Q_OPENGL_EXPORT QGLWidget* qt_gl_share_widget();
+Q_OPENGL_EXPORT void qt_destroy_gl_share_widget();
 
 class QGLWindowSurfaceGLPaintDevice : public QGLPaintDevice
 {