[gtk+] Revert "W32: Implement composition check for GDK"

[Руслан Ижбулатов <ruslanizhb src gnome org>]

commit fee41fb61626ff87981df98e8faa258039e08ecf
Author: Руслан Ижбулатов <lrn1986 gmail com>
Date:   Thu Apr 10 17:58:58 2014 +0000

    Revert "W32: Implement composition check for GDK"
    
    This reverts commit 7ae5a56948e5124eabd558438ff29187f5721819.
    
    Pushed by accident.

 gdk/win32/gdkmain-win32.c    |   29 -----------------------------
 gdk/win32/gdkprivate-win32.h |   10 ----------
 gdk/win32/gdkscreen-win32.c  |   17 -----------------
 gtk/gtkwindow.c              |    3 ---
 4 files changed, 0 insertions(+), 59 deletions(-)
---
diff --git a/gdk/win32/gdkmain-win32.c b/gdk/win32/gdkmain-win32.c
index 5011817..905c729 100644
--- a/gdk/win32/gdkmain-win32.c
+++ b/gdk/win32/gdkmain-win32.c
@@ -48,12 +48,6 @@ static gboolean gdk_synchronize = FALSE;
 
 static gboolean dummy;
 
-#ifdef HAVE_W32_DWM
-static HMODULE dwmdll = NULL;
-PFN_DwmEnableBlurBehindWindow dwmEnableBlurBehindWindow = NULL;
-PFN_DwmIsCompositionEnabled dwmIsCompositionEnabled = NULL;
-#endif
-
 const GOptionEntry _gdk_windowing_args[] = {
   { "sync", 0, 0, G_OPTION_ARG_NONE, &gdk_synchronize, 
     /* Description of --sync in --help output */              N_("Don't batch GDI requests"), NULL },
@@ -138,29 +132,6 @@ _gdk_win32_windowing_init (void)
   _cf_text_html = RegisterClipboardFormat ("text/html");
 
   _gdk_win32_selection_init ();
-
-/* HAVE_W32_DWM means that we have necessary declarations at compile-time,
- * but we'd still like to be able to run on XP, so we'll load the functions
- * we need at runtime.
- */
-#ifdef HAVE_W32_DWM
-  if (dwmdll == NULL)
-    {
-      dwmdll = LoadLibraryA ("dwmapi.dll");
-      if (dwmdll == NULL)
-        {
-          /* This will make sure that we only try this once */
-          dwmdll = INVALID_HANDLE_VALUE;
-        }
-      else
-        {
-          dwmEnableBlurBehindWindow = (PFN_DwmEnableBlurBehindWindow)
-              GetProcAddress (dwmdll, "DwmEnableBlurBehindWindow");
-          dwmIsCompositionEnabled = (PFN_DwmIsCompositionEnabled)
-              GetProcAddress (dwmdll, "DwmIsCompositionEnabled");
-        }
-    }
-#endif
 }
 
 void
diff --git a/gdk/win32/gdkprivate-win32.h b/gdk/win32/gdkprivate-win32.h
index 2482c5d..acc3fca 100644
--- a/gdk/win32/gdkprivate-win32.h
+++ b/gdk/win32/gdkprivate-win32.h
@@ -41,15 +41,6 @@
 
 #include "config.h"
 
-#ifdef HAVE_W32_DWM
-#include <dwmapi.h>
-typedef HRESULT (WINAPI *PFN_DwmEnableBlurBehindWindow)(HWND,
-    const DWM_BLURBEHIND *);
-typedef HRESULT (WINAPI *PFN_DwmIsCompositionEnabled)(BOOL *pfEnabled);
-extern PFN_DwmEnableBlurBehindWindow dwmEnableBlurBehindWindow;
-extern PFN_DwmIsCompositionEnabled dwmIsCompositionEnabled;
-#endif
-
 /* Make up for some minor w32api or MSVC6 header lossage */
 
 #ifndef PS_JOIN_MASK
@@ -505,7 +496,6 @@ gchar *_gdk_win32_display_manager_get_atom_name (GdkDisplayManager *manager,
                                                 GdkAtom            atom);
 void _gdk_win32_append_event (GdkEvent *event);
 void _gdk_win32_emit_configure_event (GdkWindow *window);
-gboolean _gdk_win32_is_desktop_composition_enabled ();
 
 /* Initialization */
 void _gdk_win32_windowing_init (void);
diff --git a/gdk/win32/gdkscreen-win32.c b/gdk/win32/gdkscreen-win32.c
index 2ab8801..d2c2dea 100644
--- a/gdk/win32/gdkscreen-win32.c
+++ b/gdk/win32/gdkscreen-win32.c
@@ -174,23 +174,6 @@ gdk_win32_screen_is_composited (GdkScreen *screen)
 {
   g_return_val_if_fail (GDK_IS_SCREEN (screen), FALSE);
 
-  return _gdk_win32_is_desktop_composition_enabled ();
-}
-
-gboolean
-_gdk_win32_is_desktop_composition_enabled ()
-{
-  BOOL b;
-  DWORD sysver, major, minor;
-  sysver = GetVersion ();
-  major = (DWORD)(LOBYTE (LOWORD (sysver)));
-  minor = (DWORD)(HIBYTE (LOWORD (sysver)));
-  /* Composition is always enabled in W8 */
-  if (major >= 6 && minor >= 2)
-    return TRUE;
-
-  if (dwmIsCompositionEnabled && (S_OK == dwmIsCompositionEnabled (&b)))
-    return b;
   return FALSE;
 }
 
diff --git a/gtk/gtkwindow.c b/gtk/gtkwindow.c
index 9104fed..d791186 100644
--- a/gtk/gtkwindow.c
+++ b/gtk/gtkwindow.c
@@ -3630,9 +3630,6 @@ gdk_window_supports_csd (GtkWindow *window)
 
       screen = gtk_widget_get_screen (widget);
 
-      if (!gdk_screen_is_composited (screen))
-        return FALSE;
-
       /* We need a visual with alpha */
       visual = gdk_screen_get_rgba_visual (screen);
       if (!visual)