1 files changed, 51 insertions, 15 deletions

diff --git a/src/gui/image/qpixmap.cpp b/src/gui/image/qpixmap.cpp
index 7fcb2b9..8ed9e93 100644
--- a/src/gui/image/qpixmap.cpp
+++ b/src/gui/image/qpixmap.cpp
@@ -379,6 +379,56 @@ QPixmap QPixmap::copy(const QRect &rect) const
 }
 
 /*!
+    \fn QPixmap::scroll(int dx, int dy, int x, int y, int width, int height, QRegion *exposed)
+
+    This convenience function is equivalent to calling QPixmap::scroll(\a dx,
+    \a dy, QRect(\a x, \a y, \a width, \a height), \a exposed).
+
+    \sa QWidget::scroll(), QGraphicsItem::scroll()
+*/
+
+/*!
+    Scrolls the area \a rect of this pixmap by (\a dx, \a dy). The exposed
+    region is left unchanged. You can optionally pass a pointer to an empty
+    QRegion to get the region that is \a exposed by the scroll operation.
+
+    \snippet doc/src/snippets/code/src_gui_image_qpixmap.cpp 2
+
+    You cannot scroll while there is an active painter on the pixmap.
+
+    \sa QWidget::scroll(), QGraphicsItem::scroll()
+*/
+void QPixmap::scroll(int dx, int dy, const QRect &rect, QRegion *exposed)
+{
+    if (isNull() || (dx == 0 && dy == 0))
+        return;
+    QRect dest = rect & this->rect();
+    QRect src = dest.translated(-dx, -dy) & dest;
+    if (src.isEmpty()) {
+        if (exposed)
+            *exposed += dest;
+        return;
+    }
+
+    detach();
+
+    if (!data->scroll(dx, dy, src)) {
+        // Fallback
+        QPixmap pix = *this;
+        QPainter painter(&pix);
+        painter.setCompositionMode(QPainter::CompositionMode_Source);
+        painter.drawPixmap(src.translated(dx, dy), *this, src);
+        painter.end();
+        *this = pix;
+    }
+
+    if (exposed) {
+        *exposed += dest;
+        *exposed -= src.translated(dx, dy);
+    }
+}
+
+/*!
     Assigns the given \a pixmap to this pixmap and returns a reference
     to this pixmap.
 
@@ -1309,14 +1359,6 @@ bool QPixmap::isDetached() const
 void QPixmap::deref()
 {
     if (data && !data->ref.deref()) { // Destroy image if last ref
-#if !defined(QT_NO_DIRECT3D) && defined(Q_WS_WIN)
-        if (data->classId() == QPixmapData::RasterClass) {
-            QRasterPixmapData *rData = static_cast<QRasterPixmapData*>(data);
-            if (rData->texture)
-                rData->texture->Release();
-            rData->texture = 0;
-        }
-#endif
         if (data->is_cached && qt_pixmap_cleanup_hook_64)
             qt_pixmap_cleanup_hook_64(cacheKey());
         delete data;
@@ -1853,7 +1895,7 @@ int QPixmap::defaultDepth()
     return QScreen::instance()->depth();
 #elif defined(Q_WS_X11)
     return QX11Info::appDepth();
-#elif defined(Q_OS_WINCE)
+#elif defined(Q_WS_WINCE)
     return QColormap::instance().depth();
 #elif defined(Q_WS_WIN)
     return 32; // XXX
@@ -1888,12 +1930,6 @@ void QPixmap::detach()
     if (id == QPixmapData::RasterClass) {
         QRasterPixmapData *rasterData = static_cast<QRasterPixmapData*>(data);
         rasterData->image.detach();
-#if defined(Q_WS_WIN) && !defined(QT_NO_DIRECT3D)
-        if (rasterData->texture) {
-            rasterData->texture->Release();
-            rasterData->texture = 0;
-        }
-#endif
     }
 
     if (data->is_cached && qt_pixmap_cleanup_hook_64 && data->ref == 1)