openbox/composite.c

   1 #include "composite.h"
   2 #include "openbox.h"
   3 #include "extensions.h"
   4
   5 #ifndef USE_XCOMPOSITE
   6 void composite_startup(gboolean reconfig) {}
   7 void composite_shutdown(gboolean reconfig) {}
   8 gboolean composite_window_has_alpha(Visual *vis) { return FALSE; }
   9 XID composite_get_window_picture(Window win, Visual *vis) { return None; }
  10 Pixmap composite_get_window_pixmap(Window win) { return None; }
  11 #else
  12
  13 static Picture root_picture = None;
  14
  15 void composite_startup(gboolean reconfig)
  16 {
  17     if (reconfig) return;
  18     if (!extensions_comp) return;
  19
  20     /* Redirect window contents to offscreen pixmaps */
  21     XCompositeRedirectSubwindows(ob_display,
  22                                  RootWindow(ob_display, ob_screen),
  23                                  CompositeRedirectAutomatic);
  24 }
  25
  26 void composite_shutdown(gboolean reconfig)
  27 {
  28     if (reconfig) return;
  29     if (!extensions_comp) return;
  30 }
  31
  32 void composite_setup_root_window()
  33 {
  34     if (root_picture)
  35         XRenderFreePicture(ob_display, root_picture);
  36
  37     root_picture =
  38         composite_get_window_picture(RootWindow(ob_display, ob_screen),
  39                                      RrVisual(ob_rr_inst));
  40 }
  41
  42 gboolean composite_window_has_alpha(Visual *vis)
  43 {
  44     XRenderPictFormat *format;
  45
  46     if (!extensions_comp) return FALSE;
  47
  48     format = XRenderFindVisualFormat(ob_display, vis);
  49     return format->type == PictTypeDirect && format->direct.alphaMask;
  50 }
  51
  52 XID composite_get_window_picture(Window win, Visual *vis)
  53 {
  54     XRenderPictureAttributes pa;
  55     XRenderPictFormat *format;
  56
  57     if (!extensions_comp) return None;
  58
  59     format = XRenderFindVisualFormat(ob_display, vis);
  60
  61     pa.subwindow_mode = IncludeInferiors;
  62     return XRenderCreatePicture(ob_display, win, format, CPSubwindowMode, &pa);
  63 }
  64
  65 Pixmap composite_get_window_pixmap(Window win)
  66 {
  67     if (!extensions_comp) return None;
  68
  69     return XCompositeNameWindowPixmap(ob_display, win);
  70 }
  71
  72 #endif