Merge remote branch 'qt/4.7' into lighthouse

Conflicts:
	configure
	mkspecs/common/qws.conf
	src/corelib/io/qresource.cpp
	src/gui/image/qpixmapdata_p.h
	src/gui/kernel/qapplication.cpp
	src/gui/kernel/qapplication_p.h
	src/gui/painting/qpaintengine_raster.cpp
	src/gui/text/qfontdatabase.cpp
	src/opengl/qgl_p.h
	src/plugins/mediaservices/gstreamer/gstreamer.pro

16 files changed, 196 insertions, 80 deletions

diff --git a/src/gui/image/image.pri b/src/gui/image/image.pri
index 1aee4f0..1df66a0 100644
--- a/src/gui/image/image.pri
+++ b/src/gui/image/image.pri
@@ -98,12 +98,12 @@ SOURCES += \
     SOURCES += image/qpnghandler.cpp
 
     contains(QT_CONFIG, system-png) {
-        unix:LIBS_PRIVATE  += -lpng
-        win32:LIBS += libpng.lib
+        unix|win32-g++*:LIBS_PRIVATE  += -lpng
+        win32:!win32-g++*:LIBS += libpng.lib
     } else {
 	DEFINES *= QT_USE_BUNDLED_LIBPNG
         !isEqual(QT_ARCH, i386):!isEqual(QT_ARCH, x86_64):DEFINES += PNG_NO_ASSEMBLER_CODE
-        INCLUDEPATH  += ../3rdparty/libpng ../3rdparty/zlib
+        INCLUDEPATH += ../3rdparty/libpng
         SOURCES += ../3rdparty/libpng/png.c \
           ../3rdparty/libpng/pngerror.c \
           ../3rdparty/libpng/pngget.c \
@@ -119,6 +119,14 @@ SOURCES += \
           ../3rdparty/libpng/pngwrite.c \
           ../3rdparty/libpng/pngwtran.c \
           ../3rdparty/libpng/pngwutil.c
+
+        contains(QT_CONFIG, system-zlib) {
+            symbian:LIBS_PRIVATE += -llibz
+            else:if(unix|win32-g++*):LIBS_PRIVATE += -lz
+            else:LIBS += zdll.lib
+        } else {
+            INCLUDEPATH  += ../3rdparty/zlib
+        }
     }
 } else {
     DEFINES *= QT_NO_IMAGEFORMAT_PNG
diff --git a/src/gui/image/qbmphandler.cpp b/src/gui/image/qbmphandler.cpp
index 42e19b8..074b8f0 100644
--- a/src/gui/image/qbmphandler.cpp
+++ b/src/gui/image/qbmphandler.cpp
@@ -674,13 +674,15 @@ bool QBmpHandler::readHeader()
 
 bool QBmpHandler::canRead() const
 {
-    if (state == Ready) {
-        if (!canRead(device()))
-            return false;
+    if (state == Ready && !canRead(device()))
+        return false;
+
+    if (state != Error) {
         setFormat("bmp");
         return true;
     }
-    return state != Error;
+
+    return false;
 }
 
 bool QBmpHandler::canRead(QIODevice *device)
diff --git a/src/gui/image/qicon.cpp b/src/gui/image/qicon.cpp
index 891b1db..a2f429a 100644
--- a/src/gui/image/qicon.cpp
+++ b/src/gui/image/qicon.cpp
@@ -66,6 +66,8 @@
 #include "private/qkde_p.h"
 #endif
 
+#include "private/qstylehelper_p.h"
+
 #ifndef QT_NO_ICON
 QT_BEGIN_NAMESPACE
 
@@ -261,21 +263,17 @@ 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 = QLatin1String("$qt_icon_")
-                  + QString::number(pm.cacheKey())
-                  + QString::number(pe->mode)
-                  + QString::number(QApplication::palette().cacheKey())
-                  + QLatin1Char('_')
-                  + QString::number(actualSize.width())
-                  + QLatin1Char('_')
-                  + QString::number(actualSize.height())
-                  + QLatin1Char('_');
-
+    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 + QString::number(mode), pm))
+        if (QPixmapCache::find(key % HexString<uint>(mode), pm))
             return pm; // horray
-        if (QPixmapCache::find(key + QString::number(QIcon::Normal), pm)) {
+        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);
@@ -284,7 +282,7 @@ QPixmap QPixmapIconEngine::pixmap(const QSize &size, QIcon::Mode mode, QIcon::St
         }
     }
 
-    if (!QPixmapCache::find(key + QString::number(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) {
@@ -294,7 +292,7 @@ QPixmap QPixmapIconEngine::pixmap(const QSize &size, QIcon::Mode mode, QIcon::St
             if (!generated.isNull())
                 pm = generated;
         }
-        QPixmapCache::insert(key + QString::number(mode), pm);
+        QPixmapCache::insert(key % HexString<uint>(mode), pm);
     }
     return pm;
 }
diff --git a/src/gui/image/qiconloader.cpp b/src/gui/image/qiconloader.cpp
index a515ef8..34f40a9 100644
--- a/src/gui/image/qiconloader.cpp
+++ b/src/gui/image/qiconloader.cpp
@@ -63,6 +63,8 @@
 #include <private/qt_x11_p.h>
 #endif
 
+#include <private/qstylehelper_p.h>
+
 QT_BEGIN_NAMESPACE
 
 Q_GLOBAL_STATIC(QIconLoader, iconLoaderInstance)
@@ -488,14 +490,12 @@ QPixmap PixmapEntry::pixmap(const QSize &size, QIcon::Mode mode, QIcon::State st
         basePixmap.load(filename);
 
     int actualSize = qMin(size.width(), size.height());
-    QString key = QLatin1String("$qt_theme_")
-                  + QString::number(basePixmap.cacheKey(), 16)
-                  + QLatin1Char('_')
-                  + QString::number(mode)
-                  + QLatin1Char('_')
-                  + QString::number(qApp->palette().cacheKey(), 16)
-                  + QLatin1Char('_')
-                  + QString::number(actualSize);
+
+    QString key = QLatin1Literal("$qt_theme_")
+                  % HexString<qint64>(basePixmap.cacheKey())
+                  % HexString<int>(mode)
+                  % HexString<qint64>(qApp->palette().cacheKey())
+                  % HexString<int>(actualSize);
 
     QPixmap cachedPixmap;
     if (QPixmapCache::find(key, &cachedPixmap)) {
diff --git a/src/gui/image/qimage.cpp b/src/gui/image/qimage.cpp
index 85be5b1..adc2632 100644
--- a/src/gui/image/qimage.cpp
+++ b/src/gui/image/qimage.cpp
@@ -272,6 +272,8 @@ bool QImageData::checkForAlphaPixels() const
 
     switch (format) {
 
+    case QImage::Format_Mono:
+    case QImage::Format_MonoLSB:
     case QImage::Format_Indexed8:
         has_alpha_pixels = has_alpha_clut;
         break;
@@ -4208,6 +4210,7 @@ QImage QImage::createHeuristicMask(bool clipTight) const
     int w = width();
     int h = height();
     QImage m(w, h, Format_MonoLSB);
+    QIMAGE_SANITYCHECK_MEMORY(m);
     m.setColorCount(2);
     m.setColor(0, QColor(Qt::color0).rgba());
     m.setColor(1, QColor(Qt::color1).rgba());
@@ -4300,6 +4303,7 @@ QImage QImage::createMaskFromColor(QRgb color, Qt::MaskMode mode) const
     if (!d)
         return QImage();
     QImage maskImage(size(), QImage::Format_MonoLSB);
+    QIMAGE_SANITYCHECK_MEMORY(maskImage);
     maskImage.fill(0);
     uchar *s = maskImage.bits();
 
@@ -4360,6 +4364,7 @@ QImage QImage::mirrored(bool horizontal, bool vertical) const
     int h = d->height;
     // Create result image, copy colormap
     QImage result(d->width, d->height, d->format);
+    QIMAGE_SANITYCHECK_MEMORY(result);
 
     // check if we ran out of of memory..
     if (!result.d)
@@ -4497,6 +4502,7 @@ QImage QImage::rgbSwapped() const
     case Format_ARGB32:
     case Format_ARGB32_Premultiplied:
         res = QImage(d->width, d->height, d->format);
+        QIMAGE_SANITYCHECK_MEMORY(res);
         for (int i = 0; i < d->height; i++) {
             uint *q = (uint*)res.scanLine(i);
             uint *p = (uint*)scanLine(i);
@@ -4510,6 +4516,7 @@ QImage QImage::rgbSwapped() const
         break;
     case Format_RGB16:
         res = QImage(d->width, d->height, d->format);
+        QIMAGE_SANITYCHECK_MEMORY(res);
         for (int i = 0; i < d->height; i++) {
             ushort *q = (ushort*)res.scanLine(i);
             const ushort *p = (const ushort*)scanLine(i);
@@ -4523,6 +4530,7 @@ QImage QImage::rgbSwapped() const
         break;
     case Format_ARGB8565_Premultiplied:
         res = QImage(d->width, d->height, d->format);
+        QIMAGE_SANITYCHECK_MEMORY(res);
         for (int i = 0; i < d->height; i++) {
             quint8 *p = (quint8*)scanLine(i);
             const quint8 *end = p + d->width * sizeof(qargb8565);
@@ -4535,6 +4543,7 @@ QImage QImage::rgbSwapped() const
         break;
     case Format_RGB666:
         res = QImage(d->width, d->height, d->format);
+        QIMAGE_SANITYCHECK_MEMORY(res);
         for (int i = 0; i < d->height; i++) {
             qrgb666 *q = reinterpret_cast<qrgb666*>(res.scanLine(i));
             const qrgb666 *p = reinterpret_cast<const qrgb666*>(scanLine(i));
@@ -4547,6 +4556,7 @@ QImage QImage::rgbSwapped() const
         break;
     case Format_ARGB6666_Premultiplied:
         res = QImage(d->width, d->height, d->format);
+        QIMAGE_SANITYCHECK_MEMORY(res);
         for (int i = 0; i < d->height; i++) {
             qargb6666 *q = reinterpret_cast<qargb6666*>(res.scanLine(i));
             const qargb6666 *p = reinterpret_cast<const qargb6666*>(scanLine(i));
@@ -4559,6 +4569,7 @@ QImage QImage::rgbSwapped() const
         break;
     case Format_RGB555:
         res = QImage(d->width, d->height, d->format);
+        QIMAGE_SANITYCHECK_MEMORY(res);
         for (int i = 0; i < d->height; i++) {
             ushort *q = (ushort*)res.scanLine(i);
             const ushort *p = (const ushort*)scanLine(i);
@@ -4572,6 +4583,7 @@ QImage QImage::rgbSwapped() const
         break;
     case Format_ARGB8555_Premultiplied:
         res = QImage(d->width, d->height, d->format);
+        QIMAGE_SANITYCHECK_MEMORY(res);
         for (int i = 0; i < d->height; i++) {
             quint8 *p = (quint8*)scanLine(i);
             const quint8 *end = p + d->width * sizeof(qargb8555);
@@ -4584,6 +4596,7 @@ QImage QImage::rgbSwapped() const
         break;
     case Format_RGB888:
         res = QImage(d->width, d->height, d->format);
+        QIMAGE_SANITYCHECK_MEMORY(res);
         for (int i = 0; i < d->height; i++) {
             quint8 *q = reinterpret_cast<quint8*>(res.scanLine(i));
             const quint8 *p = reinterpret_cast<const quint8*>(scanLine(i));
@@ -4599,6 +4612,7 @@ QImage QImage::rgbSwapped() const
         break;
     case Format_RGB444:
         res = QImage(d->width, d->height, d->format);
+        QIMAGE_SANITYCHECK_MEMORY(res);
         for (int i = 0; i < d->height; i++) {
             quint8 *q = reinterpret_cast<quint8*>(res.scanLine(i));
             const quint8 *p = reinterpret_cast<const quint8*>(scanLine(i));
@@ -4613,6 +4627,7 @@ QImage QImage::rgbSwapped() const
         break;
     case Format_ARGB4444_Premultiplied:
         res = QImage(d->width, d->height, d->format);
+        QIMAGE_SANITYCHECK_MEMORY(res);
         for (int i = 0; i < d->height; i++) {
             quint8 *q = reinterpret_cast<quint8*>(res.scanLine(i));
             const quint8 *p = reinterpret_cast<const quint8*>(scanLine(i));
@@ -4812,7 +4827,7 @@ bool QImageData::doImageIO(const QImage *image, QImageWriter *writer, int qualit
     or as a BMP image if the stream's version is 1. Note that writing
     the stream to a file will not produce a valid image file.
 
-    \sa QImage::save(), {Format of the QDataStream Operators}
+    \sa QImage::save(), {Serializing Qt Data Types}
 */
 
 QDataStream &operator<<(QDataStream &s, const QImage &image)
@@ -4838,7 +4853,7 @@ QDataStream &operator<<(QDataStream &s, const QImage &image)
     Reads an image from the given \a stream and stores it in the given
     \a image.
 
-    \sa QImage::load(), {Format of the QDataStream Operators}
+    \sa QImage::load(), {Serializing Qt Data Types}
 */
 
 QDataStream &operator>>(QDataStream &s, QImage &image)
diff --git a/src/gui/image/qpixmap.cpp b/src/gui/image/qpixmap.cpp
index 8be4bab..ec640fc 100644
--- a/src/gui/image/qpixmap.cpp
+++ b/src/gui/image/qpixmap.cpp
@@ -82,6 +82,7 @@
 #endif
 
 #include "qpixmap_raster_p.h"
+#include "private/qstylehelper_p.h"
 
 QT_BEGIN_NAMESPACE
 
@@ -635,17 +636,21 @@ void QPixmap::resize_helper(const QSize &s)
     if (size() == s)
         return;
 
+    // QPixmap.data member may be QRuntimePixmapData so use pixmapData() function to get
+    // the actual underlaying runtime pixmap data.
+    QPixmapData *pd = pixmapData();
+
     // Create new pixmap
-    QPixmap pm(QSize(w, h), data ? data->type : QPixmapData::PixmapType);
+    QPixmap pm(QSize(w, h), pd ? pd->type : QPixmapData::PixmapType);
     bool uninit = false;
 #if defined(Q_WS_X11)
-    QX11PixmapData *x11Data = data && data->classId() == QPixmapData::X11Class ? static_cast<QX11PixmapData*>(data.data()) : 0;
+    QX11PixmapData *x11Data = pd && pd->classId() == QPixmapData::X11Class ? static_cast<QX11PixmapData*>(pd) : 0;
     if (x11Data) {
         pm.x11SetScreen(x11Data->xinfo.screen());
         uninit = x11Data->flags & QX11PixmapData::Uninitialized;
     }
 #elif defined(Q_WS_MAC)
-    QMacPixmapData *macData = data && data->classId() == QPixmapData::MacClass ? static_cast<QMacPixmapData*>(data.data()) : 0;
+    QMacPixmapData *macData = pd && pd->classId() == QPixmapData::MacClass ? static_cast<QMacPixmapData*>(pd) : 0;
     if (macData)
         uninit = macData->uninit;
 #endif
@@ -659,7 +664,7 @@ void QPixmap::resize_helper(const QSize &s)
 
 #if defined(Q_WS_X11)
     if (x11Data && x11Data->x11_mask) {
-        QX11PixmapData *pmData = static_cast<QX11PixmapData*>(pm.data.data());
+        QX11PixmapData *pmData = static_cast<QX11PixmapData*>(pd);
         pmData->x11_mask = (Qt::HANDLE)XCreatePixmap(X11->display,
                                                      RootWindow(x11Data->xinfo.display(),
                                                                 x11Data->xinfo.screen()),
@@ -825,8 +830,14 @@ bool QPixmap::load(const QString &fileName, const char *format, Qt::ImageConvers
         return false;
 
     QFileInfo info(fileName);
-    QString key = QLatin1String("qt_pixmap_") + info.absoluteFilePath() + QLatin1Char('_') + QString::number(info.lastModified().toTime_t()) + QLatin1Char('_') +
-        QString::number(info.size()) + QLatin1Char('_') + QString::number(data ? data->pixelType() : QPixmapData::PixmapType);
+    if (!info.exists())
+        return false;
+
+    QString key = QLatin1Literal("qt_pixmap")
+                  % info.absoluteFilePath()
+                  % HexString<uint>(info.lastModified().toTime_t())
+                  % HexString<quint64>(info.size())
+                  % HexString<uint>(data ? data->pixelType() : QPixmapData::PixmapType);
 
     if (QPixmapCache::find(key, *this))
         return true;
@@ -1163,8 +1174,9 @@ QPixmap QPixmap::grabWidget(QWidget * widget, const QRect &rect)
 Qt::HANDLE QPixmap::handle() const
 {
 #if defined(Q_WS_X11)
-    if (data && data->classId() == QPixmapData::X11Class)
-        return static_cast<const QX11PixmapData*>(data.constData())->handle();
+    const QPixmapData *pd = pixmapData();
+    if (pd && pd->classId() == QPixmapData::X11Class)
+        return static_cast<const QX11PixmapData*>(pd)->handle();
 #endif
     return 0;
 }
@@ -1281,7 +1293,7 @@ bool QPixmap::convertFromImage(const QImage &image, ColorMode mode)
     image. Note that writing the stream to a file will not produce a
     valid image file.
 
-    \sa QPixmap::save(), {Format of the QDataStream Operators}
+    \sa QPixmap::save(), {Serializing Qt Data Types}
 */
 
 QDataStream &operator<<(QDataStream &stream, const QPixmap &pixmap)
@@ -1294,7 +1306,7 @@ QDataStream &operator<<(QDataStream &stream, const QPixmap &pixmap)
 
     Reads an image from the given \a stream into the given \a pixmap.
 
-    \sa QPixmap::load(), {Format of the QDataStream Operators}
+    \sa QPixmap::load(), {Serializing Qt Data Types}
 */
 
 QDataStream &operator>>(QDataStream &stream, QPixmap &pixmap)
@@ -1754,6 +1766,9 @@ QPixmap QPixmap::transformed(const QMatrix &matrix, Qt::TransformationMode mode)
     function returns the actual matrix used for transforming the
     pixmap.
 
+    \note When using the native X11 graphics system, the pixmap
+    becomes invalid when the QApplication instance is destroyed.
+
     \sa QBitmap, QImage, QImageReader, QImageWriter
 */
 
@@ -1946,17 +1961,20 @@ void QPixmap::detach()
     if (!data)
         return;
 
-    QPixmapData::ClassId id = data->classId();
+    // QPixmap.data member may be QRuntimePixmapData so use pixmapData() function to get
+    // the actual underlaying runtime pixmap data.
+    QPixmapData *pd = pixmapData();
+    QPixmapData::ClassId id = pd->classId();
     if (id == QPixmapData::RasterClass) {
-        QRasterPixmapData *rasterData = static_cast<QRasterPixmapData*>(data.data());
+        QRasterPixmapData *rasterData = static_cast<QRasterPixmapData*>(pd);
         rasterData->image.detach();
     }
 
     if (data->is_cached && data->ref == 1)
-        QImagePixmapCleanupHooks::executePixmapDataModificationHooks(data.data());
+        QImagePixmapCleanupHooks::executePixmapDataModificationHooks(pd);
 
 #if defined(Q_WS_MAC)
-    QMacPixmapData *macData = id == QPixmapData::MacClass ? static_cast<QMacPixmapData*>(data.data()) : 0;
+    QMacPixmapData *macData = id == QPixmapData::MacClass ? static_cast<QMacPixmapData*>(pd) : 0;
     if (macData) {
         if (macData->cg_mask) {
             CGImageRelease(macData->cg_mask);
@@ -1971,8 +1989,8 @@ void QPixmap::detach()
     ++data->detach_no;
 
 #if defined(Q_WS_X11)
-    if (data->classId() == QPixmapData::X11Class) {
-        QX11PixmapData *d = static_cast<QX11PixmapData*>(data.data());
+    if (pd->classId() == QPixmapData::X11Class) {
+        QX11PixmapData *d = static_cast<QX11PixmapData*>(pd);
         d->flags &= ~QX11PixmapData::Uninitialized;
 
         // reset the cache data
@@ -2062,9 +2080,15 @@ QPixmap QPixmap::fromImage(const QImage &image, Qt::ImageConversionFlags flags)
 */
 QPixmapData* QPixmap::pixmapData() const
 {
-    return data.data();
+    if (data) {
+        QPixmapData* pm = data.data();
+        return pm->runtimeData() ? pm->runtimeData() : pm;
+    }
+
+    return 0;
 }
 
+
 /*!
     \enum QPixmap::HBitmapFormat
 
diff --git a/src/gui/image/qpixmap.h b/src/gui/image/qpixmap.h
index 180af3b..82546da 100644
--- a/src/gui/image/qpixmap.h
+++ b/src/gui/image/qpixmap.h
@@ -271,9 +271,7 @@ private:
     friend class QX11PaintEngine;
     friend class QCoreGraphicsPaintEngine;
     friend class QWidgetPrivate;
-    friend class QRasterPaintEngine;
     friend class QRasterBuffer;
-    friend class QPixmapCacheEntry;
 #if !defined(QT_NO_DATASTREAM)
     friend Q_GUI_EXPORT QDataStream &operator>>(QDataStream &, QPixmap &);
 #endif
diff --git a/src/gui/image/qpixmap_x11.cpp b/src/gui/image/qpixmap_x11.cpp
index 6bebefc..e8dc5ae 100644
--- a/src/gui/image/qpixmap_x11.cpp
+++ b/src/gui/image/qpixmap_x11.cpp
@@ -1250,10 +1250,8 @@ void QX11PixmapData::release()
     pengine = 0;
 
     if (!X11) {
-#ifndef QT_NO_DEBUG
-        qWarning("~QX11PixmapData(): QPixmap objects must be destroyed before the QApplication"
-                 " object, otherwise the native pixmap object will be leaked.");
-#endif
+        // At this point, the X server will already have freed our resources,
+        // so there is nothing to do.
         return;
     }
 
diff --git a/src/gui/image/qpixmapcache.cpp b/src/gui/image/qpixmapcache.cpp
index 5fc605a..ca21a0c 100644
--- a/src/gui/image/qpixmapcache.cpp
+++ b/src/gui/image/qpixmapcache.cpp
@@ -39,6 +39,7 @@
 **
 ****************************************************************************/
 
+#define Q_TEST_QPIXMAPCACHE
 #include "qpixmapcache.h"
 #include "qobject.h"
 #include "qdebug.h"
@@ -194,7 +195,11 @@ public:
 
     static QPixmapCache::KeyData* getKeyData(QPixmapCache::Key *key);
 
+    QList< QPair<QString,QPixmap> > allPixmaps() const;
+    bool flushDetachedPixmaps(bool nt);
+
 private:
+    enum { soon_time = 10000, flush_time = 30000 };
     int *keyArray;
     int theid;
     int ps;
@@ -232,37 +237,49 @@ QPMCache::~QPMCache()
   cleaning-up, and to not cut down the size of the cache while the
   cache is in active use.
 
-  When the last pixmap has been deleted from the cache, kill the
-  timer so Qt won't keep the CPU from going into sleep mode.
+  When the last detached pixmap has been deleted from the cache, kill the
+  timer so Qt won't keep the CPU from going into sleep mode. Currently
+  the timer is not restarted when the pixmap becomes unused, but it does
+  restart once something else is added (i.e. the cache space is actually needed).
+
+  Returns true if any were removed.
 */
-void QPMCache::timerEvent(QTimerEvent *)
+bool QPMCache::flushDetachedPixmaps(bool nt)
 {
     int mc = maxCost();
-    bool nt = totalCost() == ps;
     setMaxCost(nt ? totalCost() * 3 / 4 : totalCost() -1);
     setMaxCost(mc);
     ps = totalCost();
 
+    bool any = false;
     QHash<QString, QPixmapCache::Key>::iterator it = cacheKeys.begin();
     while (it != cacheKeys.end()) {
         if (!contains(it.value())) {
             releaseKey(it.value());
             it = cacheKeys.erase(it);
+            any = true;
         } else {
             ++it;
         }
     }
 
-    if (!size()) {
+    return any;
+}
+
+void QPMCache::timerEvent(QTimerEvent *)
+{
+    bool nt = totalCost() == ps;
+    if (!flushDetachedPixmaps(nt)) {
         killTimer(theid);
         theid = 0;
     } else if (nt != t) {
         killTimer(theid);
-        theid = startTimer(nt ? 10000 : 30000);
+        theid = startTimer(nt ? soon_time : flush_time);
         t = nt;
     }
 }
 
+
 QPixmap *QPMCache::object(const QString &key) const
 {
     QPixmapCache::Key cacheKey = cacheKeys.value(key);
@@ -305,7 +322,7 @@ bool QPMCache::insert(const QString& key, const QPixmap &pixmap, int cost)
     if (success) {
         cacheKeys.insert(key, cacheKey);
         if (!theid) {
-            theid = startTimer(30000);
+            theid = startTimer(flush_time);
             t = false;
         }
     } else {
@@ -321,7 +338,7 @@ QPixmapCache::Key QPMCache::insert(const QPixmap &pixmap, int cost)
     bool success = QCache<QPixmapCache::Key, QPixmapCacheEntry>::insert(cacheKey, new QPixmapCacheEntry(cacheKey, pixmap), cost);
     if (success) {
         if (!theid) {
-            theid = startTimer(30000);
+            theid = startTimer(flush_time);
             t = false;
         }
     } else {
@@ -342,7 +359,7 @@ bool QPMCache::replace(const QPixmapCache::Key &key, const QPixmap &pixmap, int
     bool success = QCache<QPixmapCache::Key, QPixmapCacheEntry>::insert(cacheKey, new QPixmapCacheEntry(cacheKey, pixmap), cost);
     if (success) {
         if(!theid) {
-            theid = startTimer(30000);
+            theid = startTimer(flush_time);
             t = false;
         }
         const_cast<QPixmapCache::Key&>(key) = cacheKey;
@@ -422,6 +439,20 @@ QPixmapCache::KeyData* QPMCache::getKeyData(QPixmapCache::Key *key)
     return key->d;
 }
 
+QList< QPair<QString,QPixmap> > QPMCache::allPixmaps() const
+{
+    QList< QPair<QString,QPixmap> > r;
+    QHash<QString, QPixmapCache::Key>::const_iterator it = cacheKeys.begin();
+    while (it != cacheKeys.end()) {
+        QPixmap *ptr = QCache<QPixmapCache::Key, QPixmapCacheEntry>::object(it.value());
+        if (ptr)
+            r.append(QPair<QString,QPixmap>(it.key(),*ptr));
+        ++it;
+    }
+    return r;
+}
+
+
 Q_GLOBAL_STATIC(QPMCache, pm_cache)
 
 int Q_AUTOTEST_EXPORT q_QPixmapCache_keyHashSize()
@@ -633,4 +664,19 @@ void QPixmapCache::clear()
     }
 }
 
+void QPixmapCache::flushDetachedPixmaps()
+{
+    pm_cache()->flushDetachedPixmaps(true);
+}
+
+int QPixmapCache::totalUsed()
+{
+    return (pm_cache()->totalCost()+1023) / 1024;
+}
+
+QList< QPair<QString,QPixmap> > QPixmapCache::allPixmaps()
+{
+    return pm_cache()->allPixmaps();
+}
+
 QT_END_NAMESPACE
diff --git a/src/gui/image/qpixmapcache.h b/src/gui/image/qpixmapcache.h
index 50a9369..e9c8c15 100644
--- a/src/gui/image/qpixmapcache.h
+++ b/src/gui/image/qpixmapcache.h
@@ -44,6 +44,10 @@
 
 #include <QtGui/qpixmap.h>
 
+#ifdef Q_TEST_QPIXMAPCACHE
+#include <QtCore/qpair.h>
+#endif
+
 QT_BEGIN_HEADER
 
 QT_BEGIN_NAMESPACE
@@ -83,6 +87,12 @@ public:
     static void remove(const QString &key);
     static void remove(const Key &key);
     static void clear();
+
+#ifdef Q_TEST_QPIXMAPCACHE
+    static void flushDetachedPixmaps();
+    static int totalUsed();
+    static QList< QPair<QString,QPixmap> > allPixmaps();
+#endif
 };
 
 QT_END_NAMESPACE
diff --git a/src/gui/image/qpixmapcache_p.h b/src/gui/image/qpixmapcache_p.h
index 86a1b78..6db3b20 100644
--- a/src/gui/image/qpixmapcache_p.h
+++ b/src/gui/image/qpixmapcache_p.h
@@ -81,8 +81,9 @@ class QPixmapCacheEntry : public QPixmap
 public:
     QPixmapCacheEntry(const QPixmapCache::Key &key, const QPixmap &pix) : QPixmap(pix), key(key)
     {
-        if (data && data->classId() == QPixmapData::RasterClass) {
-            QRasterPixmapData *d = static_cast<QRasterPixmapData*>(data.data());
+        QPixmapData *pd = pixmapData();
+        if (pd && pd->classId() == QPixmapData::RasterClass) {
+            QRasterPixmapData *d = static_cast<QRasterPixmapData*>(pd);
             if (!d->image.isNull() && d->image.d->paintEngine
                 && !d->image.d->paintEngine->isActive())
             {
@@ -95,6 +96,8 @@ public:
     QPixmapCache::Key key;
 };
 
+inline bool qIsDetached(QPixmapCacheEntry &t) { return t.isDetached(); }
+
 QT_END_NAMESPACE
 
 #endif // QPIXMAPCACHE_P_H
diff --git a/src/gui/image/qpixmapdata_p.h b/src/gui/image/qpixmapdata_p.h
index 8323b61..6d2a827 100644
--- a/src/gui/image/qpixmapdata_p.h
+++ b/src/gui/image/qpixmapdata_p.h
@@ -73,7 +73,8 @@ public:
     };
 #endif
     enum ClassId { RasterClass, X11Class, MacClass, DirectFBClass,
-                   OpenGLClass, OpenVGClass, BlitterClass, CustomClass = 1024 };
+                   OpenGLClass, OpenVGClass, RuntimeClass, BlitterClass,
+                   CustomClass = 1024 };
 
     QPixmapData(PixelType pixelType, int classId);
     virtual ~QPixmapData();
@@ -133,7 +134,10 @@ public:
 
     static QPixmapData *create(int w, int h, PixelType type);
 
+    virtual QPixmapData *runtimeData() const { return 0; }
+
 protected:
+
     void setSerialNumber(int serNo);
     int w;
     int h;
diff --git a/src/gui/image/qpnghandler.cpp b/src/gui/image/qpnghandler.cpp
index dd31834..2cf8222 100644
--- a/src/gui/image/qpnghandler.cpp
+++ b/src/gui/image/qpnghandler.cpp
@@ -892,13 +892,15 @@ QPngHandler::~QPngHandler()
 
 bool QPngHandler::canRead() const
 {
-    if (d->state == QPngHandlerPrivate::Ready) {
-        if (!canRead(device()))
-            return false;
+    if (d->state == QPngHandlerPrivate::Ready && !canRead(device()))
+        return false;
+
+    if (d->state != QPngHandlerPrivate::Error) {
         setFormat("png");
         return true;
     }
-    return d->state != QPngHandlerPrivate::Error;
+
+    return false;
 }
 
 bool QPngHandler::canRead(QIODevice *device)
diff --git a/src/gui/image/qppmhandler.cpp b/src/gui/image/qppmhandler.cpp
index cbbbef4..a9e796c 100644
--- a/src/gui/image/qppmhandler.cpp
+++ b/src/gui/image/qppmhandler.cpp
@@ -409,13 +409,15 @@ bool QPpmHandler::readHeader()
 
 bool QPpmHandler::canRead() const
 {
-    if (state == Ready) {
-        if (!canRead(device(), &subType))
-            return false;
+    if (state == Ready && !canRead(device(), &subType))
+        return false;
+
+    if (state != Error) {
         setFormat(subType);
         return true;
     }
-    return state != Error;
+
+    return false;
 }
 
 bool QPpmHandler::canRead(QIODevice *device, QByteArray *subType)
diff --git a/src/gui/image/qxbmhandler.cpp b/src/gui/image/qxbmhandler.cpp
index 385340a..0dd4e99 100644
--- a/src/gui/image/qxbmhandler.cpp
+++ b/src/gui/image/qxbmhandler.cpp
@@ -261,13 +261,15 @@ bool QXbmHandler::readHeader()
 
 bool QXbmHandler::canRead() const
 {
-    if (state == Ready) {
-        if (!canRead(device()))
-            return false;
+    if (state == Ready && !canRead(device()))
+        return false;
+
+    if (state != Error) {
         setFormat("xbm");
         return true;
     }
-    return state != Error;
+
+    return false;
 }
 
 bool QXbmHandler::canRead(QIODevice *device)
diff --git a/src/gui/image/qxpmhandler.cpp b/src/gui/image/qxpmhandler.cpp
index a475cd0..b97afd3 100644
--- a/src/gui/image/qxpmhandler.cpp
+++ b/src/gui/image/qxpmhandler.cpp
@@ -1225,11 +1225,15 @@ bool QXpmHandler::readImage(QImage *image)
 
 bool QXpmHandler::canRead() const
 {
-    if (state == Ready && canRead(device())) {
+    if (state == Ready && !canRead(device()))
+        return false;
+
+    if (state != Error) {
         setFormat("xpm");
         return true;
     }
-    return state != Error;
+
+    return false;
 }
 
 bool QXpmHandler::canRead(QIODevice *device)