Merge remote-tracking branch 'mainline/4.7' into 4.7

Conflicts:
	dist/changes-4.7.4

4 files changed, 109 insertions, 43 deletions

diff --git a/tools/qmeegographicssystemhelper/qmeegographicssystemhelper.cpp b/tools/qmeegographicssystemhelper/qmeegographicssystemhelper.cpp
index ac32995..6778bd5 100644
--- a/tools/qmeegographicssystemhelper/qmeegographicssystemhelper.cpp
+++ b/tools/qmeegographicssystemhelper/qmeegographicssystemhelper.cpp
@@ -47,7 +47,6 @@
 #include <private/qpixmap_raster_p.h>
 #include <private/qwindowsurface_gl_p.h>
 #include "qmeegoruntime.h"
-#include "qmeegoswitchevent.h"
 
 QString QMeeGoGraphicsSystemHelper::runningGraphicsSystemName()
 {
@@ -77,46 +76,12 @@ bool QMeeGoGraphicsSystemHelper::isRunningRuntime()
 
 void QMeeGoGraphicsSystemHelper::switchToMeeGo()
 {
-    if (isRunningMeeGo())
-        return;
-
-    if (QApplicationPrivate::instance()->graphics_system_name != QLatin1String("runtime"))
-        qWarning("Can't switch to meego - switching only supported with 'runtime' graphics system.");
-    else {
-        QMeeGoSwitchEvent willSwitchEvent(QLatin1String("meego"), QMeeGoSwitchEvent::WillSwitch);
-        foreach (QWidget *widget, QApplication::topLevelWidgets())
-            QCoreApplication::sendEvent(widget, &willSwitchEvent);
-
-        QApplication *app = static_cast<QApplication *>(QCoreApplication::instance());
-        app->setGraphicsSystem(QLatin1String("meego"));
-
-        QMeeGoSwitchEvent didSwitchEvent(QLatin1String("meego"), QMeeGoSwitchEvent::DidSwitch);
-        foreach (QWidget *widget, QApplication::topLevelWidgets())
-            QCoreApplication::sendEvent(widget, &didSwitchEvent);
-    }
+    QMeeGoRuntime::switchToMeeGo();
 }
 
 void QMeeGoGraphicsSystemHelper::switchToRaster()
 {
-    if (runningGraphicsSystemName() == QLatin1String("raster"))
-        return;
-
-    if (QApplicationPrivate::instance()->graphics_system_name != QLatin1String("runtime"))
-        qWarning("Can't switch to raster - switching only supported with 'runtime' graphics system.");
-    else {
-        QMeeGoSwitchEvent willSwitchEvent(QLatin1String("raster"), QMeeGoSwitchEvent::WillSwitch);
-        foreach (QWidget *widget, QApplication::topLevelWidgets())
-            QCoreApplication::sendEvent(widget, &willSwitchEvent);
-
-        QApplication *app = static_cast<QApplication *>(QCoreApplication::instance());
-        app->setGraphicsSystem(QLatin1String("raster"));
-
-	QMeeGoRuntime::invalidateLiveSurfaces();
-
-        QMeeGoSwitchEvent didSwitchEvent(QLatin1String("raster"), QMeeGoSwitchEvent::DidSwitch);
-        foreach (QWidget *widget, QApplication::topLevelWidgets())
-            QCoreApplication::sendEvent(widget, &didSwitchEvent);
-    }
+    QMeeGoRuntime::switchToRaster();
 }
 
 Qt::HANDLE QMeeGoGraphicsSystemHelper::imageToEGLSharedImage(const QImage &image)
@@ -170,3 +135,13 @@ void QMeeGoGraphicsSystemHelper::setSwapBehavior(SwapMode mode)
     else if (mode == KillSwap)
         QGLWindowSurface::swapBehavior = QGLWindowSurface::KillSwap;
 }
+
+void QMeeGoGraphicsSystemHelper::setSwitchPolicy(SwitchPolicy policy)
+{
+    QMeeGoRuntime::setSwitchPolicy(policy);
+}
+
+void QMeeGoGraphicsSystemHelper::enableSwitchEvents()
+{
+    QMeeGoRuntime::enableSwitchEvents();
+}
diff --git a/tools/qmeegographicssystemhelper/qmeegographicssystemhelper.h b/tools/qmeegographicssystemhelper/qmeegographicssystemhelper.h
index 5a3b57e..4612190 100644
--- a/tools/qmeegographicssystemhelper/qmeegographicssystemhelper.h
+++ b/tools/qmeegographicssystemhelper/qmeegographicssystemhelper.h
@@ -97,14 +97,22 @@ public:
     */
     static bool isRunningRuntime();
 
+    //! Enables the sending of QMeeGoSwitchEvent's when the graphicssystem switches.
+    /*!
+      An application that wishes to start receive QMeegoSwitchEvents must call this function.
+    */
+    static void enableSwitchEvents();
+
     //! Switches to meego graphics system. 
     /*!
      When running with the 'runtime' graphics system, sets the currently active 
      system to 'meego'. The window surface and all the resources are automatically
      migrated to OpenGL. Will fail if the active graphics system is not 'runtime'.
      Calling this function will emit QMeeGoSwitchEvent to the top level widgets.
-     Two events will be emitted for each switch -- one before the switch (QMeeGoSwitchEvent::WillSwitch)
-     and one after the switch (QMeeGoSwitchEvent::DidSwitch).
+     If switch events are enabled, two events will be emitted for each switch --
+     one before the switch (QMeeGoSwitchEvent::WillSwitch) and one after the
+     switch (QMeeGoSwitchEvent::DidSwitch).
+     If the switch policy is set to NoSwitch, this function has no effect.
     */
     static void switchToMeeGo();
 
@@ -114,12 +122,30 @@ public:
      system to 'raster'. The window surface and the graphics resources (including the 
      EGL shared image resources) are automatically migrated back to the CPU. All OpenGL 
      resources (surface, context, cache, font cache) are automaticall anihilated.
-     Calling this function will emit QMeeGoSwitchEvent to the top level widgets.
-     Two events will be emitted for each switch -- one before the switch (QMeeGoSwitchEvent::WillSwitch)
-     and one after the switch (QMeeGoSwitchEvent::DidSwitch).
+     Calling this function will emit QMeeGoSwitchEvent to the top level widgets. If switch
+     events are enabled, two events will be emitted for each switch -- one before the
+     switch (QMeeGoSwitchEvent::WillSwitch) and one after the switch (QMeeGoSwitchEvent::DidSwitch).
+     If the switch policy is set to NoSwitch, this function has no effect.
     */
     static void switchToRaster();
 
+    //! Used to specify the policy for graphics system switching.
+    enum SwitchPolicy {
+        AutomaticSwitch,    /**< Automatic switching */
+        ManualSwitch,       /**< Switching is controleld by the application */
+        NoSwitch            /**< Switching is disabled completely */
+    };
+
+    //! Sets the policy of graphicssystem switching
+    /*!
+     By default, the switch to raster happens automatically when all windows are either
+     minimized or when the last window is destroyed. This function lets the application
+     change the graphicssystem switching policy to prevent the switching from happening
+     automatically (that is if the application doesn't want switching at all or wishes
+     to control the switching manually).
+    */
+    static void setSwitchPolicy(SwitchPolicy policy);
+
     //! Returns the name of the active graphics system
     /*!
      Returns the name of the currently active system. If running with 'runtime' graphics 
diff --git a/tools/qmeegographicssystemhelper/qmeegoruntime.cpp b/tools/qmeegographicssystemhelper/qmeegoruntime.cpp
index 7c81d51..928d01a 100644
--- a/tools/qmeegographicssystemhelper/qmeegoruntime.cpp
+++ b/tools/qmeegographicssystemhelper/qmeegoruntime.cpp
@@ -41,6 +41,11 @@
 
 #include "qmeegoruntime.h"
 
+#include "qmeegoswitchevent.h"
+
+#include <QtGui/QApplication>
+#include <QtGui/QWidget>
+
 #include <private/qlibrary_p.h>
 #include <private/qfactoryloader_p.h>
 #include <private/qgraphicssystemplugin_p.h>
@@ -49,6 +54,7 @@
 #define ENSURE_INITIALIZED {if (!initialized) initialize();}
 
 bool QMeeGoRuntime::initialized = false;
+bool QMeeGoRuntime::switchEventsEnabled = false;
 
 typedef int (*QMeeGoImageToEglSharedImageFunc) (const QImage&);
 typedef QPixmapData* (*QMeeGoPixmapDataFromEglSharedImageFunc) (Qt::HANDLE handle, const QImage&);
@@ -66,6 +72,10 @@ typedef Qt::HANDLE (*QMeeGoLiveTextureGetHandleFunc) (QPixmap*);
 typedef void* (*QMeeGoCreateFenceSyncFunc) (void);
 typedef void (*QMeeGoDestroyFenceSyncFunc) (void *fs);
 typedef void (*QMeeGoInvalidateLiveSurfacesFunc) (void);
+typedef void (*QMeeGoSwitchToRasterFunc) (void);
+typedef void (*QMeeGoSwitchToMeeGoFunc) (void);
+typedef void (*QMeeGoRegisterSwitchCallbackFunc) (void (*callback)(int type, const char *name));
+typedef void (*QMeeGoSetSwitchPolicyFunc) (int policy);
 
 static QMeeGoImageToEglSharedImageFunc qt_meego_image_to_egl_shared_image = NULL;
 static QMeeGoPixmapDataFromEglSharedImageFunc qt_meego_pixmapdata_from_egl_shared_image = NULL;
@@ -83,6 +93,17 @@ static QMeeGoLiveTextureGetHandleFunc qt_meego_live_texture_get_handle = NULL;
 static QMeeGoCreateFenceSyncFunc qt_meego_create_fence_sync = NULL;
 static QMeeGoDestroyFenceSyncFunc qt_meego_destroy_fence_sync = NULL;
 static QMeeGoInvalidateLiveSurfacesFunc qt_meego_invalidate_live_surfaces = NULL;
+static QMeeGoSwitchToRasterFunc qt_meego_switch_to_raster = NULL;
+static QMeeGoSwitchToMeeGoFunc qt_meego_switch_to_meego = NULL;
+static QMeeGoRegisterSwitchCallbackFunc qt_meego_register_switch_callback = NULL;
+static QMeeGoSetSwitchPolicyFunc qt_meego_set_switch_policy = NULL;
+
+extern "C" void handleSwitch(int type, const char *name)
+{
+    QMeeGoSwitchEvent switchEvent((QLatin1String(name)), QMeeGoSwitchEvent::State(type));
+    foreach (QWidget *widget, QApplication::topLevelWidgets())
+        QCoreApplication::sendEvent(widget, &switchEvent);
+}
 
 void QMeeGoRuntime::initialize()
 {
@@ -112,13 +133,19 @@ void QMeeGoRuntime::initialize()
         qt_meego_create_fence_sync = (QMeeGoCreateFenceSyncFunc) library.resolve("qt_meego_create_fence_sync");
         qt_meego_destroy_fence_sync = (QMeeGoDestroyFenceSyncFunc) library.resolve("qt_meego_destroy_fence_sync");
         qt_meego_invalidate_live_surfaces = (QMeeGoInvalidateLiveSurfacesFunc) library.resolve("qt_meego_invalidate_live_surfaces");
+        qt_meego_switch_to_raster = (QMeeGoSwitchToRasterFunc) library.resolve("qt_meego_switch_to_raster");
+        qt_meego_switch_to_meego = (QMeeGoSwitchToMeeGoFunc) library.resolve("qt_meego_switch_to_meego");
+        qt_meego_register_switch_callback = (QMeeGoRegisterSwitchCallbackFunc) library.resolve("qt_meego_register_switch_callback");
+        qt_meego_set_switch_policy = (QMeeGoSetSwitchPolicyFunc) library.resolve("qt_meego_set_switch_policy");
 
         if (qt_meego_image_to_egl_shared_image && qt_meego_pixmapdata_from_egl_shared_image && 
             qt_meego_pixmapdata_with_gl_texture && qt_meego_destroy_egl_shared_image && qt_meego_update_egl_shared_image_pixmap && 
             qt_meego_set_surface_fixed_size && qt_meego_set_surface_scaling && qt_meego_set_translucent && 
             qt_meego_pixmapdata_with_new_live_texture && qt_meego_pixmapdata_from_live_texture_handle &&
             qt_meego_live_texture_lock && qt_meego_live_texture_release && qt_meego_live_texture_get_handle &&
-            qt_meego_create_fence_sync && qt_meego_destroy_fence_sync && qt_meego_invalidate_live_surfaces)
+            qt_meego_create_fence_sync && qt_meego_destroy_fence_sync && qt_meego_invalidate_live_surfaces &&
+            qt_meego_switch_to_raster && qt_meego_switch_to_meego && qt_meego_register_switch_callback &&
+            qt_meego_set_switch_policy)
         {
             qDebug("Successfully resolved MeeGo graphics system: %s %s\n", qPrintable(libraryPrivate->fileName), qPrintable(libraryPrivate->fullVersion));
         } else {
@@ -242,3 +269,34 @@ void QMeeGoRuntime::invalidateLiveSurfaces()
     Q_ASSERT(qt_meego_invalidate_live_surfaces);
     qt_meego_invalidate_live_surfaces();
 }
+
+void QMeeGoRuntime::switchToRaster()
+{
+    ENSURE_INITIALIZED;
+    Q_ASSERT(qt_meego_switch_to_raster);
+    qt_meego_switch_to_raster();
+}
+
+void QMeeGoRuntime::switchToMeeGo()
+{
+    ENSURE_INITIALIZED;
+    Q_ASSERT(qt_meego_switch_to_meego);
+    qt_meego_switch_to_meego();
+}
+
+void QMeeGoRuntime::enableSwitchEvents()
+{
+    ENSURE_INITIALIZED;
+    if (!switchEventsEnabled) {
+        Q_ASSERT(qt_meego_register_switch_callback);
+        qt_meego_register_switch_callback(handleSwitch);
+        switchEventsEnabled = true;
+    }
+}
+
+void QMeeGoRuntime::setSwitchPolicy(QMeeGoGraphicsSystemHelper::SwitchPolicy policy)
+{
+    ENSURE_INITIALIZED;
+    Q_ASSERT(qt_meego_set_switch_policy);
+    qt_meego_set_switch_policy(int(policy));
+}
diff --git a/tools/qmeegographicssystemhelper/qmeegoruntime.h b/tools/qmeegographicssystemhelper/qmeegoruntime.h
index b91efae..b898699 100644
--- a/tools/qmeegographicssystemhelper/qmeegoruntime.h
+++ b/tools/qmeegographicssystemhelper/qmeegoruntime.h
@@ -42,6 +42,8 @@
 #include <QPixmap>
 #include <QImage>
 
+#include "qmeegographicssystemhelper.h"
+
 class QMeeGoRuntime
 {
 public:
@@ -63,7 +65,12 @@ public:
     static void* createFenceSync();
     static void destroyFenceSync(void *fs);
     static void invalidateLiveSurfaces();
+    static void switchToRaster();
+    static void switchToMeeGo();
+    static void enableSwitchEvents();
+    static void setSwitchPolicy(QMeeGoGraphicsSystemHelper::SwitchPolicy policy);
 
 private:
     static bool initialized;
+    static bool switchEventsEnabled;
 };