Re: Sluggish graphics

[Russell Shaw <rjshaw iprimus com au>]

Russell Shaw wrote:
> Hi,
> In a thread, i call gdk_window_get_pointer(drawing_area->window,x,y,NULL).
> If the window is 400x400, the call takes 0.13ms. However, if i make the
> window close to full screen size, the call takes 300-350ms. And the mouse
> cursor only responds to movement every ~300ms too. It happens about 70%
> of the time. The other 30%, the call still takes ~0.15ms for a full window.
>
> Within the thread, gdk_window_get_pointer(...) is being called 10 
> times/sec.
>
> I have nothing being drawn in this window, or any others.
> (500MHz PIII system, GTK2)
>
> drawing_area created as:
>
>    drawing_area=gtk_drawing_area_new();
>
>    gtk_widget_set_events(drawing_area,
>           GDK_EXPOSURE_MASK
>         | GDK_ENTER_NOTIFY_MASK
>         | GDK_BUTTON_PRESS_MASK
>         | GDK_BUTTON_RELEASE_MASK
>         | GDK_KEY_PRESS_MASK
>         | GDK_KEY_RELEASE_MASK);
>   ...
>   gdk_threads_enter();
>   gtk_main();
>   gdk_threads_leave();

Solved. I had a huge memory leak. I put this in the configure
event callback:

  if(cache_pixmap)
    g_object_unref(G_OBJECT(cache_pixmap));

Without it, lots of server memory gets used when you make the
window bigger, which generates lots of configure events.