Remove define KWIN_HAVE_COMPOSITING

Building the workspaces requires to have all the build dependencies
which were required for KWIN_HAVE_COMPOSITING to be set. This allows
us to remove all the ifdefs for this and gives us a cleaner code.

CMakeLists.txt

@@ -28,36 +28,19 @@ if(KWIN_PLASMA_ACTIVE)
     set(KWIN_BUILD_WITH_OPENGLES ON)
 endif(KWIN_PLASMA_ACTIVE)
 
-# KWIN_HAVE_COMPOSITING - whether any compositing support is available
-if( X11_Xcomposite_FOUND AND X11_Xdamage_FOUND )
-    set( KWIN_HAVE_COMPOSITING 1 )
-endif( X11_Xcomposite_FOUND AND X11_Xdamage_FOUND )
+# KWIN_HAVE_OPENGL_COMPOSITING - always have either OpenGL or OpenGL ES
+set( KWIN_HAVE_OPENGL_COMPOSITING 1 )
 
-# KWIN_HAVE_OPENGL_COMPOSITING - whether OpenGL-based compositing support is available
-if( KWIN_HAVE_COMPOSITING AND OPENGL_FOUND )
-    set( KWIN_HAVE_OPENGL_COMPOSITING 1 )
-endif( KWIN_HAVE_COMPOSITING AND OPENGL_FOUND )
-
-# KWIN_HAVE_XRENDER_COMPOSITING - whether XRender-based compositing support is available
-if( KWIN_HAVE_COMPOSITING AND X11_Xrender_FOUND AND X11_Xfixes_FOUND AND KWIN_BUILD_XRENDER_COMPOSITING )
+# KWIN_HAVE_XRENDER_COMPOSITING - whether XRender-based compositing support is available: may be disabled
+if( KWIN_BUILD_XRENDER_COMPOSITING )
     set( KWIN_HAVE_XRENDER_COMPOSITING 1 )
-endif( KWIN_HAVE_COMPOSITING AND X11_Xrender_FOUND AND X11_Xfixes_FOUND AND KWIN_BUILD_XRENDER_COMPOSITING )
+endif( KWIN_BUILD_XRENDER_COMPOSITING )
 
 # KWIN_HAVE_OPENGLES_COMPOSITING - whether OpenGL ES-based compositing support is available
-if( KWIN_HAVE_COMPOSITING AND OPENGLES_FOUND AND KWIN_BUILD_WITH_OPENGLES)
-    set( KWIN_HAVE_OPENGL_COMPOSITING 1)
+if( OPENGLES_FOUND AND KWIN_BUILD_WITH_OPENGLES)
     set( KWIN_HAVE_OPENGLES_COMPOSITING 1 )
     message("Compiling KWin for mobile.")
-endif( KWIN_HAVE_COMPOSITING AND OPENGLES_FOUND AND KWIN_BUILD_WITH_OPENGLES )
-
-# safety
-if( KWIN_HAVE_OPENGL_COMPOSITING OR KWIN_HAVE_XRENDER_COMPOSITING )
-    # ok
-else( KWIN_HAVE_OPENGL_COMPOSITING OR KWIN_HAVE_XRENDER_COMPOSITING )
-    set( KWIN_HAVE_COMPOSITING ) # unset
-endif( KWIN_HAVE_OPENGL_COMPOSITING OR KWIN_HAVE_XRENDER_COMPOSITING )
-
-macro_log_feature(KWIN_HAVE_COMPOSITING "Compositing support" "X11 Compositing support"  "http://www.x.org/" FALSE "" "XComposite and XDamage extensions and OpenGL or XRender with XFixes are required for KWin compositing support")
+endif( OPENGLES_FOUND AND KWIN_BUILD_WITH_OPENGLES )
 
 macro_bool_to_01( OPENGL_FOUND KWIN_HAVE_OPENGL )
 macro_bool_to_01( KWIN_HAVE_OPENGLES_COMPOSITING KWIN_HAVE_OPENGLES )
@@ -101,9 +84,7 @@ if( KWIN_BUILD_DECORATIONS )
 endif( KWIN_BUILD_DECORATIONS )
 add_subdirectory( data )
 
-if( KWIN_HAVE_COMPOSITING )
 add_subdirectory( effects )
-endif( KWIN_HAVE_COMPOSITING )
 
 ########### next target ###############
 

composite.cpp

@@ -85,7 +85,6 @@ extern int currentRefreshRate();
 
 void Workspace::setupCompositing()
 {
-#ifdef KWIN_HAVE_COMPOSITING
     if (scene != NULL)
         return;
     if (compositingSuspended) {
@@ -154,11 +153,7 @@ void Workspace::setupCompositing()
         break;
 #endif
     default:
-#ifndef KWIN_HAVE_COMPOSITING
-        kDebug(1212) << "Compositing was not available at compile time";
-#else
         kDebug(1212) << "No compositing enabled";
-#endif
         delete cm_selection;
         return;
     }
@@ -191,14 +186,10 @@ void Workspace::setupCompositing()
     foreach (Unmanaged * c, unmanaged)
     c->setupCompositing();
     discardPopup(); // force re-creation of the Alt+F3 popup (opacity option)
-#else
-    kDebug(1212) << "Compositing was not available at compile time";
-#endif
 }
 
 void Workspace::finishCompositing()
 {
-#ifdef KWIN_HAVE_COMPOSITING
     if (scene == NULL)
         return;
     m_finishingCompositing = true;
@@ -241,7 +232,6 @@ void Workspace::finishCompositing()
     while (!deleted.isEmpty())
         deleted.first()->discard(Allowed);
     m_finishingCompositing = false;
-#endif
 }
 
 // OpenGL self-check failed, fallback to XRender
@@ -377,7 +367,6 @@ void Workspace::timerEvent(QTimerEvent *te)
 
 void Workspace::performCompositing()
 {
-#ifdef KWIN_HAVE_COMPOSITING
     if (((repaints_region.isEmpty() && !windowRepaintsPending())  // no damage
             || !scene->overlayWindow()->isVisible())) { // nothing is visible anyway
         vBlankPadding += 3;
@@ -427,7 +416,6 @@ void Workspace::performCompositing()
     // checkCompositeTime() would restart it again somewhen later, called from functions that
     // would again add something pending.
     checkCompositeTimer();
-#endif
 }
 
 void Workspace::performMousePoll()
@@ -532,7 +520,6 @@ void Workspace::delayedCheckUnredirect()
 
 void Toplevel::setupCompositing()
 {
-#ifdef KWIN_HAVE_COMPOSITING
     if (!compositing())
         return;
     damageRatio = 0.0;
@@ -545,12 +532,10 @@ void Toplevel::setupCompositing()
     unredirect = false;
     workspace()->checkUnredirect(true);
     scene->windowAdded(this);
-#endif
 }
 
 void Toplevel::finishCompositing()
 {
-#ifdef KWIN_HAVE_COMPOSITING
     damageRatio = 0.0;
     if (damage_handle == None)
         return;
@@ -564,7 +549,6 @@ void Toplevel::finishCompositing()
     damage_region = QRegion();
     repaints_region = QRegion();
     effect_window = NULL;
-#endif
 }
 
 void Toplevel::discardWindowPixmap()
@@ -581,7 +565,6 @@ void Toplevel::discardWindowPixmap()
 
 Pixmap Toplevel::createWindowPixmap()
 {
-#ifdef KWIN_HAVE_COMPOSITING
     assert(compositing());
     if (unredirected())
         return None;
@@ -600,9 +583,6 @@ Pixmap Toplevel::createWindowPixmap()
     }
     ungrabXServer();
     return pix;
-#else
-    return None;
-#endif
 }
 
 #ifdef HAVE_XDAMAGE

compositingprefs.cpp

@@ -69,7 +69,6 @@ bool CompositingPrefs::compositingPossible()
         gl_workaround_group.readEntry("OpenGLIsUnsafe", false))
         return false;
 
-#ifdef KWIN_HAVE_COMPOSITING
     Extensions::init();
     if (!Extensions::compositeAvailable()) {
         kDebug(1212) << "No composite extension available";
@@ -92,14 +91,10 @@ bool CompositingPrefs::compositingPossible()
 #endif
     kDebug(1212) << "No OpenGL or XRender/XFixes support";
     return false;
-#else
-    return false;
-#endif
 }
 
 QString CompositingPrefs::compositingNotPossibleReason()
 {
-#ifdef KWIN_HAVE_COMPOSITING
     // first off, check whether we figured that we'll crash on detection because of a buggy driver
     KSharedConfigPtr config = KSharedConfig::openConfig("kwinrc");
     KConfigGroup gl_workaround_group(config, "Compositing");
@@ -129,10 +124,6 @@ QString CompositingPrefs::compositingNotPossibleReason()
     }
 #endif
     return QString();
-#else
-    return i18n("Compositing was disabled at compile time.\n"
-                "It is likely Xorg development headers were not installed.");
-#endif
 }
 
 static bool s_glxDetected = false;

libkwineffects/kwinconfig.h.cmake

@@ -16,9 +16,6 @@
 
 */
 
-/* KWIN_HAVE_COMPOSITING - whether any compositing support is available */
-#cmakedefine KWIN_HAVE_COMPOSITING
-
 /* KWIN_HAVE_OPENGL_COMPOSITING - whether OpenGL-based compositing support is available */
 #cmakedefine KWIN_HAVE_OPENGL_COMPOSITING