diff --git a/src/gui/image/qicon.cpp b/src/gui/image/qicon.cpp
index ffe7e3088e..76224fe56e 100644
--- a/src/gui/image/qicon.cpp
+++ b/src/gui/image/qicon.cpp
@@ -45,7 +45,6 @@
 #include "qiconengineplugin.h"
 #include "private/qfactoryloader_p.h"
 #include "private/qiconloader_p.h"
-#include "qapplication.h"
 #include "qstyleoption.h"
 #include "qpainter.h"
 #include "qfileinfo.h"
@@ -263,37 +262,38 @@ QPixmap QPixmapIconEngine::pixmap(const QSize &size, QIcon::Mode mode, QIcon::St
     if (!actualSize.isNull() && (actualSize.width() > size.width() || actualSize.height() > size.height()))
         actualSize.scale(size, Qt::KeepAspectRatio);
 
-    QString key = QLatin1Literal("qt_")
-                  % HexString<quint64>(pm.cacheKey())
-                  % HexString<uint>(pe->mode)
-                  % HexString<quint64>(QApplication::palette().cacheKey())
-                  % HexString<uint>(actualSize.width())
-                  % HexString<uint>(actualSize.height());
+    // #### Qt5 no idea what this really does, but we need to remove the QApp and style references
+//    QString key = QLatin1Literal("qt_")
+//                  % HexString<quint64>(pm.cacheKey())
+//                  % HexString<uint>(pe->mode)
+//                  % HexString<quint64>(QApplication::palette().cacheKey())
+//                  % HexString<uint>(actualSize.width())
+//                  % HexString<uint>(actualSize.height());
 
-    if (mode == QIcon::Active) {
-        if (QPixmapCache::find(key % HexString<uint>(mode), pm))
-            return pm; // horray
-        if (QPixmapCache::find(key % HexString<uint>(QIcon::Normal), pm)) {
-            QStyleOption opt(0);
-            opt.palette = QApplication::palette();
-            QPixmap active = QApplication::style()->generatedIconPixmap(QIcon::Active, pm, &opt);
-            if (pm.cacheKey() == active.cacheKey())
-                return pm;
-        }
-    }
+//    if (mode == QIcon::Active) {
+//        if (QPixmapCache::find(key % HexString<uint>(mode), pm))
+//            return pm; // horray
+//        if (QPixmapCache::find(key % HexString<uint>(QIcon::Normal), pm)) {
+//            QStyleOption opt(0);
+//            opt.palette = QApplication::palette();
+//            QPixmap active = QApplication::style()->generatedIconPixmap(QIcon::Active, pm, &opt);
+//            if (pm.cacheKey() == active.cacheKey())
+//                return pm;
+//        }
+//    }
 
-    if (!QPixmapCache::find(key % HexString<uint>(mode), pm)) {
+//    if (!QPixmapCache::find(key % HexString<uint>(mode), pm)) {
         if (pm.size() != actualSize)
             pm = pm.scaled(actualSize, Qt::IgnoreAspectRatio, Qt::SmoothTransformation);
-        if (pe->mode != mode && mode != QIcon::Normal) {
-            QStyleOption opt(0);
-            opt.palette = QApplication::palette();
-            QPixmap generated = QApplication::style()->generatedIconPixmap(mode, pm, &opt);
-            if (!generated.isNull())
-                pm = generated;
-        }
-        QPixmapCache::insert(key % HexString<uint>(mode), pm);
-    }
+//        if (pe->mode != mode && mode != QIcon::Normal) {
+//            QStyleOption opt(0);
+//            opt.palette = QApplication::palette();
+//            QPixmap generated = QApplication::style()->generatedIconPixmap(mode, pm, &opt);
+//            if (!generated.isNull())
+//                pm = generated;
+//        }
+//        QPixmapCache::insert(key % HexString<uint>(mode), pm);
+//    }
     return pm;
 }
 
diff --git a/src/gui/image/qiconloader.cpp b/src/gui/image/qiconloader.cpp
index c423397624..c7ff18da61 100644
--- a/src/gui/image/qiconloader.cpp
+++ b/src/gui/image/qiconloader.cpp
@@ -41,7 +41,7 @@
 #ifndef QT_NO_ICON
 #include <private/qiconloader_p.h>
 
-#include <private/qapplication_p.h>
+#include <private/qguiapplication_qpa_p.h>
 #include <private/qicon_p.h>
 #include <private/qguiplatformplugin_p.h>
 
diff --git a/src/gui/image/qnativeimage.cpp b/src/gui/image/qnativeimage.cpp
index a5a4e7b614..2b03f17363 100644
--- a/src/gui/image/qnativeimage.cpp
+++ b/src/gui/image/qnativeimage.cpp
@@ -45,7 +45,7 @@
 
 #include "private/qpaintengine_raster_p.h"
 
-#include "private/qapplication_p.h"
+#include "private/qguiapplication_qpa_p.h"
 
 #if defined(Q_WS_X11) && !defined(QT_NO_MITSHM)
 #include <qx11info_x11.h>
@@ -301,11 +301,7 @@ QNativeImage::~QNativeImage()
 
 QImage::Format QNativeImage::systemFormat()
 {
-#ifdef Q_WS_QPA
-    return QApplicationPrivate::platformIntegration()->screens().at(0)->format();
-#else
-    return QImage::Format_RGB32;
-#endif
+    return QGuiApplicationPrivate::platformIntegration()->screens().at(0)->format();
 }
 
 #endif // platforms
diff --git a/src/gui/image/qpicture.cpp b/src/gui/image/qpicture.cpp
index 3f38c0ce2a..4a71fa57ad 100644
--- a/src/gui/image/qpicture.cpp
+++ b/src/gui/image/qpicture.cpp
@@ -1217,7 +1217,6 @@ QDataStream &operator>>(QDataStream &s, QPicture &r)
 
 QT_BEGIN_INCLUDE_NAMESPACE
 #include "qregexp.h"
-#include "qapplication.h"
 #include "qpictureformatplugin.h"
 QT_END_INCLUDE_NAMESPACE
 
diff --git a/src/gui/image/qpixmap.cpp b/src/gui/image/qpixmap.cpp
index 7c1779236d..25e818f7b6 100644
--- a/src/gui/image/qpixmap.cpp
+++ b/src/gui/image/qpixmap.cpp
@@ -52,8 +52,7 @@
 #include "qpainter.h"
 #include "qdatastream.h"
 #include "qbuffer.h"
-#include "qapplication.h"
-#include <private/qapplication_p.h>
+#include <private/qguiapplication_qpa_p.h>
 #include <private/qwidget_p.h>
 #include "qevent.h"
 #include "qfile.h"
@@ -64,6 +63,7 @@
 #include "qimagewriter.h"
 #include "qpaintengine.h"
 #include "qthread.h"
+#include "qdebug.h"
 
 #ifdef Q_WS_MAC
 # include "private/qt_mac_p.h"
@@ -97,25 +97,17 @@ Q_GUI_EXPORT qint64 qt_pixmap_id(const QPixmap &pixmap)
 
 static bool qt_pixmap_thread_test()
 {
-    if (!qApp) {
+    if (!QCoreApplication::instance()) {
         qFatal("QPixmap: Must construct a QApplication before a QPaintDevice");
         return false;
     }
 
     if (qApp->thread() != QThread::currentThread()) {
         bool fail = false;
-#if defined (Q_WS_X11)
-        if (!QApplication::testAttribute(Qt::AA_X11InitThreads))
-            fail = true;
-#elif defined (Q_WS_QPA)
-        if (!QApplicationPrivate::platformIntegration()->hasCapability(QPlatformIntegration::ThreadedPixmaps)) {
+        if (!QGuiApplicationPrivate::platformIntegration()->hasCapability(QPlatformIntegration::ThreadedPixmaps)) {
             printf("Lighthouse plugin does not support threaded pixmaps!\n");
             fail = true;
         }
-#else
-        if (QApplicationPrivate::graphics_system_name != QLatin1String("raster"))
-            fail = true;
-#endif
         if (fail) {
             qWarning("QPixmap: It is not safe to use pixmaps outside the GUI thread");
             return false;
@@ -129,16 +121,8 @@ void QPixmap::init(int w, int h, Type type)
     init(w, h, int(type));
 }
 
-extern QApplication::Type qt_appType;
-
 void QPixmap::init(int w, int h, int type)
 {
-    if (qt_appType == QApplication::Tty) {
-        qWarning("QPixmap: Cannot create a QPixmap when no GUI is being used");
-        data = 0;
-        return;
-    }
-
     if ((w > 0 && h > 0) || type == QPixmapData::BitmapType)
         data = QPixmapData::create(w, h, (QPixmapData::PixelType) type);
     else
@@ -985,7 +969,7 @@ bool QPixmap::doImageIO(QImageWriter *writer, int quality) const
     return writer->write(toImage());
 }
 
-
+// #### Qt5: needs fixing
 // The implementation (and documentation) of
 // QPixmap::fill(const QWidget *, const QPoint &)
 // is in qwidget.cpp
@@ -1071,6 +1055,7 @@ qint64 QPixmap::cacheKey() const
     return data->cacheKey();
 }
 
+#if 0
 static void sendResizeEvents(QWidget *target)
 {
     QResizeEvent e(target->size(), QSize());
@@ -1083,6 +1068,7 @@ static void sendResizeEvents(QWidget *target)
             sendResizeEvents(child);
     }
 }
+#endif
 
 /*!
     \fn QPixmap QPixmap::grabWidget(QWidget * widget, const QRect &rectangle)
@@ -1116,6 +1102,11 @@ static void sendResizeEvents(QWidget *target)
 
 QPixmap QPixmap::grabWidget(QWidget * widget, const QRect &rect)
 {
+    // ### Qt5: should we keep or remove this method?
+    // SC solution would be to install a callback form QtWidgets, but ugly.
+    qWarning() << "QPixmap::grabWidget is deprecated, use QWidget::render() instead";
+    return QPixmap();
+#if 0
     if (!widget)
         return QPixmap();
 
@@ -1141,6 +1132,7 @@ QPixmap QPixmap::grabWidget(QWidget * widget, const QRect &rect)
     widget->d_func()->render(&res, QPoint(), r, QWidget::DrawWindowBackground
                              | QWidget::DrawChildren | QWidget::IgnoreMask, true);
     return res;
+#endif
 }
 
 /*!
diff --git a/src/gui/image/qpixmap_blitter.cpp b/src/gui/image/qpixmap_blitter.cpp
index fa8ae3deec..a761d111fd 100644
--- a/src/gui/image/qpixmap_blitter.cpp
+++ b/src/gui/image/qpixmap_blitter.cpp
@@ -44,7 +44,7 @@
 #include <qpainter.h>
 #include <qimage.h>
 
-#include <private/qapplication_p.h>
+#include <private/qguiapplication_qpa_p.h>
 #include <private/qblittable_p.h>
 
 #include <private/qdrawhelper_p.h>
@@ -98,7 +98,7 @@ void QBlittablePixmapData::resize(int width, int height)
     delete m_engine;
     m_engine = 0;
 #ifdef Q_WS_QPA
-    d = QApplicationPrivate::platformIntegration()->screens().at(0)->depth();
+    d = QGuiApplicationPrivate::platformIntegration()->screens().at(0)->depth();
 #endif
     w = width;
     h = height;
diff --git a/src/gui/image/qpixmapdata.cpp b/src/gui/image/qpixmapdata.cpp
index bc1a9c8db2..0f604e463c 100644
--- a/src/gui/image/qpixmapdata.cpp
+++ b/src/gui/image/qpixmapdata.cpp
@@ -43,7 +43,7 @@
 #include <QtCore/qbuffer.h>
 #include <QtGui/qbitmap.h>
 #include <QtGui/qimagereader.h>
-#include <private/qapplication_p.h>
+#include <private/qguiapplication_qpa_p.h>
 #include <private/qimagepixmapcleanuphooks_p.h>
 
 QT_BEGIN_NAMESPACE
diff --git a/src/gui/image/qpixmapdatafactory.cpp b/src/gui/image/qpixmapdatafactory.cpp
index 109a39072a..2c165daa26 100644
--- a/src/gui/image/qpixmapdatafactory.cpp
+++ b/src/gui/image/qpixmapdatafactory.cpp
@@ -60,7 +60,7 @@
 # include <private/qpixmap_s60_p.h>
 #endif
 
-#include "private/qapplication_p.h"
+#include "private/qguiapplication_qpa_p.h"
 
 QT_BEGIN_NAMESPACE
 
diff --git a/src/gui/image/qpixmapfilter.cpp b/src/gui/image/qpixmapfilter.cpp
index dd84c39500..f440304a18 100644
--- a/src/gui/image/qpixmapfilter.cpp
+++ b/src/gui/image/qpixmapfilter.cpp
@@ -48,7 +48,7 @@
 #include "qpixmapfilter_p.h"
 #include "qvarlengtharray.h"
 
-#include "private/qapplication_p.h"
+#include "private/qguiapplication_qpa_p.h"
 #include "private/qpaintengineex_p.h"
 #include "private/qpaintengine_raster_p.h"
 #include "qmath.h"