4 files changed, 35 insertions, 1 deletions
diff --git a/src/gui/image/qpixmap.cpp b/src/gui/image/qpixmap.cpp
index fd2c139..ef9be8f 100644
--- a/src/gui/image/qpixmap.cpp
+++ b/src/gui/image/qpixmap.cpp
@@ -2018,7 +2018,7 @@ void QPixmap::detach()
     the color table. If this is too expensive an operation, you can
     use QBitmap::fromImage() instead.
 
-    \sa toImage(), {QPixmap#Pixmap Conversion}{Pixmap Conversion}
+    \sa fromImageReader(), toImage(), {QPixmap#Pixmap Conversion}{Pixmap Conversion}
 */
 QPixmap QPixmap::fromImage(const QImage &image, Qt::ImageConversionFlags flags)
 {
@@ -2033,6 +2033,27 @@ QPixmap QPixmap::fromImage(const QImage &image, Qt::ImageConversionFlags flags)
 }
 
 /*!
+    \fn QPixmap QPixmap::fromImageReader(QImageReader *imageReader, Qt::ImageConversionFlags flags)
+
+    Create a QPixmap from an image read directly from an \a imageReader.
+    The \a flags argument is a bitwise-OR of the \l{Qt::ImageConversionFlags}.
+    Passing 0 for \a flags sets all the default options.
+
+    On some systems, reading an image directly to QPixmap can use less memory than
+    reading a QImage to convert it to QPixmap.
+
+    \sa fromImage(), toImage(), {QPixmap#Pixmap Conversion}{Pixmap Conversion}
+*/
+QPixmap QPixmap::fromImageReader(QImageReader *imageReader, Qt::ImageConversionFlags flags)
+{
+    QGraphicsSystem *gs = QApplicationPrivate::graphicsSystem();
+    QScopedPointer<QPixmapData> data(gs ? gs->createPixmapData(QPixmapData::PixmapType)
+            : QGraphicsSystem::createDefaultPixmapData(QPixmapData::PixmapType));
+    data->fromImageReader(imageReader, flags);
+    return QPixmap(data.take());
+}
+
+/*!
     \fn QPixmap QPixmap::grabWindow(WId window, int x, int y, int
     width, int height)
 
diff --git a/src/gui/image/qpixmap.h b/src/gui/image/qpixmap.h
index 82546da..64ca8a3 100644
--- a/src/gui/image/qpixmap.h
+++ b/src/gui/image/qpixmap.h
@@ -62,6 +62,7 @@ QT_BEGIN_NAMESPACE
 QT_MODULE(Gui)
 
 class QImageWriter;
+class QImageReader;
 class QColor;
 class QVariant;
 class QX11Info;
@@ -134,6 +135,7 @@ public:
 
     QImage toImage() const;
     static QPixmap fromImage(const QImage &image, Qt::ImageConversionFlags flags = Qt::AutoColor);
+    static QPixmap fromImageReader(QImageReader *imageReader, Qt::ImageConversionFlags flags = Qt::AutoColor);
 
     bool load(const QString& fileName, const char *format = 0, Qt::ImageConversionFlags flags = Qt::AutoColor);
     bool loadFromData(const uchar *buf, uint len, const char* format = 0, Qt::ImageConversionFlags flags = Qt::AutoColor);
diff --git a/src/gui/image/qpixmapdata.cpp b/src/gui/image/qpixmapdata.cpp
index 345e3cf..ef1f6c4 100644
--- a/src/gui/image/qpixmapdata.cpp
+++ b/src/gui/image/qpixmapdata.cpp
@@ -124,6 +124,13 @@ static QImage makeBitmapCompliantIfNeeded(QPixmapData *d, const QImage &image, Q
     return image;
 }
 
+void QPixmapData::fromImageReader(QImageReader *imageReader,
+                                  Qt::ImageConversionFlags flags)
+{
+    const QImage image = imageReader->read();
+    fromImage(image, flags);
+}
+
 bool QPixmapData::fromFile(const QString &fileName, const char *format,
                            Qt::ImageConversionFlags flags)
 {
diff --git a/src/gui/image/qpixmapdata_p.h b/src/gui/image/qpixmapdata_p.h
index 9a1505a..ec62b0b 100644
--- a/src/gui/image/qpixmapdata_p.h
+++ b/src/gui/image/qpixmapdata_p.h
@@ -58,6 +58,8 @@
 
 QT_BEGIN_NAMESPACE
 
+class QImageReader;
+
 class Q_GUI_EXPORT QPixmapData
 {
 public:
@@ -83,6 +85,8 @@ public:
     virtual void resize(int width, int height) = 0;
     virtual void fromImage(const QImage &image,
                            Qt::ImageConversionFlags flags) = 0;
+    virtual void fromImageReader(QImageReader *imageReader,
+                                 Qt::ImageConversionFlags flags);
 
     virtual bool fromFile(const QString &filename, const char *format,
                           Qt::ImageConversionFlags flags);