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Branched from the monolithic repo, Qt master branch, at commit
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diff --git a/src/declarative/graphicsitems/qdeclarativeimage.cpp b/src/declarative/graphicsitems/qdeclarativeimage.cpp
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+++ b/src/declarative/graphicsitems/qdeclarativeimage.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the QtDeclarative module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "private/qdeclarativeimage_p.h"
+#include "private/qdeclarativeimage_p_p.h"
+
+#include <QKeyEvent>
+#include <QPainter>
+
+QT_BEGIN_NAMESPACE
+
+
+/*!
+    \qmlclass Image QDeclarativeImage
+    \since 4.7
+    \ingroup qml-basic-visual-elements
+    \brief The Image element displays an image in a declarative user interface
+    \inherits Item
+
+    The Image element is used to display images in a declarative user interface.
+
+    The source of the image is specified as a URL using the \l source property.
+    Images can be supplied in any of the standard image formats supported by Qt,
+    including bitmap formats such as PNG and JPEG, and vector graphics formats
+    such as SVG. If you need to display animated images, use the \l AnimatedImage
+    element.
+
+    If the \l{Item::width}{width} and \l{Item::height}{height} properties are not
+    specified, the Image element automatically uses the size of the loaded image.
+    By default, specifying the width and height of the element causes the image
+    to be scaled to that size. This behavior can be changed by setting the
+    \l fillMode property, allowing the image to be stretched and tiled instead.
+
+    \section1 Example Usage
+
+    The following example shows the simplest usage of the Image element.
+
+    \snippet doc/src/snippets/declarative/image.qml document
+
+    \beginfloatleft
+    \image declarative-qtlogo.png
+    \endfloat
+
+    \clearfloat
+
+    \section1 Performance
+
+    By default, locally available images are loaded immediately, and the user interface
+    is blocked until loading is complete. If a large image is to be loaded, it may be
+    preferable to load the image in a low priority thread, by enabling the \l asynchronous
+    property.
+
+    If the image is obtained from a network rather than a local resource, it is
+    automatically loaded asynchronously, and the \l progress and \l status properties
+    are updated as appropriate.
+
+    Images are cached and shared internally, so if several Image elements have the same \l source,
+    only one copy of the image will be loaded.
+
+    \bold Note: Images are often the greatest user of memory in QML user interfaces.  It is recommended
+    that images which do not form part of the user interface have their
+    size bounded via the \l sourceSize property. This is especially important for content
+    that is loaded from external sources or provided by the user.
+
+    \sa {declarative/imageelements/image}{Image example}, QDeclarativeImageProvider
+*/
+
+QDeclarativeImage::QDeclarativeImage(QDeclarativeItem *parent)
+    : QDeclarativeImageBase(*(new QDeclarativeImagePrivate), parent)
+{
+}
+
+QDeclarativeImage::QDeclarativeImage(QDeclarativeImagePrivate &dd, QDeclarativeItem *parent)
+    : QDeclarativeImageBase(dd, parent)
+{
+}
+
+QDeclarativeImage::~QDeclarativeImage()
+{
+}
+
+QPixmap QDeclarativeImage::pixmap() const
+{
+    Q_D(const QDeclarativeImage);
+    return d->pix.pixmap();
+}
+
+void QDeclarativeImage::setPixmap(const QPixmap &pix)
+{
+    Q_D(QDeclarativeImage);
+    if (!d->url.isEmpty())
+        return;
+    d->setPixmap(pix);
+}
+
+void QDeclarativeImagePrivate::setPixmap(const QPixmap &pixmap)
+{
+    Q_Q(QDeclarativeImage);
+    pix.setPixmap(pixmap);
+
+    q->pixmapChange();
+    status = pix.isNull() ? QDeclarativeImageBase::Null : QDeclarativeImageBase::Ready;
+
+    q->update();
+}
+
+/*!
+    \qmlproperty enumeration Image::fillMode
+
+    Set this property to define what happens when the source image has a different size
+    than the item.
+
+    \list
+    \o Image.Stretch - the image is scaled to fit
+    \o Image.PreserveAspectFit - the image is scaled uniformly to fit without cropping
+    \o Image.PreserveAspectCrop - the image is scaled uniformly to fill, cropping if necessary
+    \o Image.Tile - the image is duplicated horizontally and vertically
+    \o Image.TileVertically - the image is stretched horizontally and tiled vertically
+    \o Image.TileHorizontally - the image is stretched vertically and tiled horizontally
+    \endlist
+
+    \table
+    
+    \row
+    \o \image declarative-qtlogo-stretch.png
+    \o Stretch (default)
+    \qml
+    Image {
+        width: 130; height: 100
+        smooth: true
+        source: "qtlogo.png"
+    }
+    \endqml
+
+    \row
+    \o \image declarative-qtlogo-preserveaspectfit.png
+    \o PreserveAspectFit
+    \qml
+    Image {
+        width: 130; height: 100
+        fillMode: Image.PreserveAspectFit
+        smooth: true
+        source: "qtlogo.png"
+    }
+    \endqml
+
+    \row
+    \o \image declarative-qtlogo-preserveaspectcrop.png
+    \o PreserveAspectCrop
+    \qml
+    Image {
+        width: 130; height: 100
+        fillMode: Image.PreserveAspectCrop
+        smooth: true
+        source: "qtlogo.png"
+        clip: true
+    }
+    \endqml
+
+    \row
+    \o \image declarative-qtlogo-tile.png
+    \o Tile
+    \qml
+    Image {
+        width: 120; height: 120
+        fillMode: Image.Tile
+        source: "qtlogo.png"
+    }
+    \endqml
+
+    \row
+    \o \image declarative-qtlogo-tilevertically.png
+    \o TileVertically
+    \qml
+    Image {
+        width: 120; height: 120
+        fillMode: Image.TileVertically
+        smooth: true
+        source: "qtlogo.png"
+    }
+    \endqml
+
+    \row
+    \o \image declarative-qtlogo-tilehorizontally.png
+    \o TileHorizontally
+    \qml
+    Image {
+        width: 120; height: 120
+        fillMode: Image.TileHorizontally
+        smooth: true
+        source: "qtlogo.png"
+    }
+    \endqml
+
+    \endtable
+
+    Note that \c clip is \c false by default which means that the element might
+    paint outside its bounding rectangle even if the fillMode is set to \c PreserveAspectCrop.
+
+    \sa {declarative/imageelements/image}{Image example}
+*/
+QDeclarativeImage::FillMode QDeclarativeImage::fillMode() const
+{
+    Q_D(const QDeclarativeImage);
+    return d->fillMode;
+}
+
+void QDeclarativeImage::setFillMode(FillMode mode)
+{
+    Q_D(QDeclarativeImage);
+    if (d->fillMode == mode)
+        return;
+    d->fillMode = mode;
+    update();
+    updatePaintedGeometry();
+    emit fillModeChanged();
+}
+
+/*!
+
+    \qmlproperty real Image::paintedWidth
+    \qmlproperty real Image::paintedHeight
+
+    These properties hold the size of the image that is actually painted.
+    In most cases it is the same as \c width and \c height, but when using a 
+    \c fillMode \c PreserveAspectFit or \c fillMode \c PreserveAspectCrop 
+    \c paintedWidth or \c paintedHeight can be smaller or larger than 
+    \c width and \c height of the Image element.
+*/
+qreal QDeclarativeImage::paintedWidth() const
+{
+    Q_D(const QDeclarativeImage);
+    return d->paintedWidth;
+}
+
+qreal QDeclarativeImage::paintedHeight() const
+{
+    Q_D(const QDeclarativeImage);
+    return d->paintedHeight;
+}
+
+/*!
+    \qmlproperty enumeration Image::status
+
+    This property holds the status of image loading.  It can be one of:
+    \list
+    \o Image.Null - no image has been set
+    \o Image.Ready - the image has been loaded
+    \o Image.Loading - the image is currently being loaded
+    \o Image.Error - an error occurred while loading the image
+    \endlist
+
+    Use this status to provide an update or respond to the status change in some way.
+    For example, you could:
+
+    \list
+    \o Trigger a state change:
+    \qml
+        State { name: 'loaded'; when: image.status == Image.Ready }
+    \endqml
+
+    \o Implement an \c onStatusChanged signal handler:
+    \qml
+        Image {
+            id: image
+            onStatusChanged: if (image.status == Image.Ready) console.log('Loaded')
+        }
+    \endqml
+
+    \o Bind to the status value:
+    \qml
+        Text { text: image.status == Image.Ready ? 'Loaded' : 'Not loaded' }
+    \endqml
+    \endlist
+
+    \sa progress
+*/
+
+/*!
+    \qmlproperty real Image::progress
+
+    This property holds the progress of image loading, from 0.0 (nothing loaded)
+    to 1.0 (finished).
+
+    \sa status
+*/
+
+/*!
+    \qmlproperty bool Image::smooth
+
+    Set this property if you want the image to be smoothly filtered when scaled or
+    transformed.  Smooth filtering gives better visual quality, but is slower.  If
+    the image is displayed at its natural size, this property has no visual or
+    performance effect.
+
+    \note Generally scaling artifacts are only visible if the image is stationary on
+    the screen.  A common pattern when animating an image is to disable smooth
+    filtering at the beginning of the animation and reenable it at the conclusion.
+*/
+
+/*!
+    \qmlproperty QSize Image::sourceSize
+
+    This property holds the actual width and height of the loaded image.
+
+    Unlike the \l {Item::}{width} and \l {Item::}{height} properties, which scale
+    the painting of the image, this property sets the actual number of pixels
+    stored for the loaded image so that large images do not use more
+    memory than necessary. For example, this ensures the image in memory is no
+    larger than 1024x1024 pixels, regardless of the Image's \l {Item::}{width} and 
+    \l {Item::}{height} values:
+
+    \code
+    Rectangle {
+        width: ...
+        height: ...
+
+        Image {
+           anchors.fill: parent
+           source: "reallyBigImage.jpg"
+           sourceSize.width: 1024
+           sourceSize.height: 1024
+        }
+    }
+    \endcode
+
+    If the image's actual size is larger than the sourceSize, the image is scaled down.
+    If only one dimension of the size is set to greater than 0, the
+    other dimension is set in proportion to preserve the source image's aspect ratio.
+    (The \l fillMode is independent of this.)
+
+    If the source is an instrinsically scalable image (eg. SVG), this property
+    determines the size of the loaded image regardless of intrinsic size.
+    Avoid changing this property dynamically; rendering an SVG is \e slow compared
+    to an image.
+
+    If the source is a non-scalable image (eg. JPEG), the loaded image will
+    be no greater than this property specifies. For some formats (currently only JPEG),
+    the whole image will never actually be loaded into memory.
+
+    Since QtQuick 1.1 the sourceSize can be cleared to the natural size of the image
+    by setting sourceSize to \c undefined.
+ 
+    \note \e {Changing this property dynamically causes the image source to be reloaded,
+    potentially even from the network, if it is not in the disk cache.}
+*/
+
+void QDeclarativeImage::updatePaintedGeometry()
+{
+    Q_D(QDeclarativeImage);
+
+    if (d->fillMode == PreserveAspectFit) {
+        if (!d->pix.width() || !d->pix.height()) {
+            setImplicitWidth(0);
+            setImplicitHeight(0);
+            return;
+        }
+        qreal w = widthValid() ? width() : d->pix.width();
+        qreal widthScale = w / qreal(d->pix.width());
+        qreal h = heightValid() ? height() : d->pix.height();
+        qreal heightScale = h / qreal(d->pix.height());
+        if (widthScale <= heightScale) {
+            d->paintedWidth = w;
+            d->paintedHeight = widthScale * qreal(d->pix.height());
+        } else if(heightScale < widthScale) {
+            d->paintedWidth = heightScale * qreal(d->pix.width());
+            d->paintedHeight = h;
+        }
+        if (widthValid() && !heightValid()) {
+            setImplicitHeight(d->paintedHeight);
+        } else {
+            setImplicitHeight(d->pix.height());
+        }
+        if (heightValid() && !widthValid()) {
+            setImplicitWidth(d->paintedWidth);
+        } else {
+            setImplicitWidth(d->pix.width());
+        }
+    } else if (d->fillMode == PreserveAspectCrop) {
+        if (!d->pix.width() || !d->pix.height())
+            return;
+        qreal widthScale = width() / qreal(d->pix.width());
+        qreal heightScale = height() / qreal(d->pix.height());
+        if (widthScale < heightScale) {
+            widthScale = heightScale;
+        } else if(heightScale < widthScale) {
+            heightScale = widthScale;
+        }
+
+        d->paintedHeight = heightScale * qreal(d->pix.height());
+        d->paintedWidth = widthScale * qreal(d->pix.width());
+    } else {
+        d->paintedWidth = width();
+        d->paintedHeight = height();
+    }
+    emit paintedGeometryChanged();
+}
+
+void QDeclarativeImage::geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry)
+{
+    QDeclarativeImageBase::geometryChanged(newGeometry, oldGeometry);
+    updatePaintedGeometry();
+}
+
+QRectF QDeclarativeImage::boundingRect() const
+{
+    Q_D(const QDeclarativeImage);
+    return QRectF(0, 0, qMax(d->mWidth, d->paintedWidth), qMax(d->mHeight, d->paintedHeight));
+}
+
+/*!
+    \qmlproperty url Image::source
+
+    Image can handle any image format supported by Qt, loaded from any URL scheme supported by Qt.
+
+    The URL may be absolute, or relative to the URL of the component.
+
+    \sa QDeclarativeImageProvider
+*/
+
+/*!
+    \qmlproperty bool Image::asynchronous
+
+    Specifies that images on the local filesystem should be loaded
+    asynchronously in a separate thread.  The default value is
+    false, causing the user interface thread to block while the
+    image is loaded.  Setting \a asynchronous to true is useful where
+    maintaining a responsive user interface is more desirable
+    than having images immediately visible.
+
+    Note that this property is only valid for images read from the
+    local filesystem.  Images loaded via a network resource (e.g. HTTP)
+    are always loaded asynchonously.
+*/
+
+/*!
+    \qmlproperty bool Image::cache
+    \since Quick 1.1
+
+    Specifies whether the image should be cached. The default value is
+    true. Setting \a cache to false is useful when dealing with large images,
+    to make sure that they aren't cached at the expense of small 'ui element' images.
+*/
+
+/*!
+    \qmlproperty bool Image::mirror
+    \since Quick 1.1
+
+    This property holds whether the image should be horizontally inverted
+    (effectively displaying a mirrored image).
+
+    The default value is false.
+*/
+
+
+void QDeclarativeImage::paint(QPainter *p, const QStyleOptionGraphicsItem *, QWidget *)
+{
+    Q_D(QDeclarativeImage);
+    if (d->pix.pixmap().isNull() )
+        return;
+
+    int drawWidth = width();
+    int drawHeight = height();
+    bool doClip = false;
+    QTransform transform;
+    qreal widthScale = width() / qreal(d->pix.width());
+    qreal heightScale = height() / qreal(d->pix.height());
+
+    if (width() != d->pix.width() || height() != d->pix.height()) {
+        if (d->fillMode >= Tile) {
+            if (d->fillMode == TileVertically) {
+                transform.scale(widthScale, 1.0);
+                drawWidth = d->pix.width();
+            } else if (d->fillMode == TileHorizontally) {
+                transform.scale(1.0, heightScale);
+                drawHeight = d->pix.height();
+            }
+        } else {
+            if (d->fillMode == PreserveAspectFit) {
+                if (widthScale <= heightScale) {
+                    heightScale = widthScale;
+                    transform.translate(0, (height() - heightScale * d->pix.height()) / 2);
+                } else if(heightScale < widthScale) {
+                    widthScale = heightScale;
+                    transform.translate((width() - widthScale * d->pix.width()) / 2, 0);
+                }
+            } else if (d->fillMode == PreserveAspectCrop) {
+                if (widthScale < heightScale) {
+                    widthScale = heightScale;
+                    transform.translate((width() - widthScale * d->pix.width()) / 2, 0);
+                } else if(heightScale < widthScale) {
+                    heightScale = widthScale;
+                    transform.translate(0, (height() - heightScale * d->pix.height()) / 2);
+                }
+            }
+            transform.scale(widthScale, heightScale);
+            drawWidth = d->pix.width();
+            drawHeight = d->pix.height();
+            doClip = clip();
+        }
+    }
+
+    QTransform oldTransform;
+    bool oldAA = p->testRenderHint(QPainter::Antialiasing);
+    bool oldSmooth = p->testRenderHint(QPainter::SmoothPixmapTransform);
+    if (d->smooth)
+        p->setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform, d->smooth);
+    if (doClip) {
+        p->save();
+        p->setClipRect(QRectF(0, 0, d->mWidth, d->mHeight), Qt::IntersectClip);
+    }
+    if (d->mirror)
+        transform.translate(drawWidth, 0).scale(-1.0, 1.0);
+    if (!transform.isIdentity()) {
+        oldTransform = p->transform();
+        p->setWorldTransform(transform * oldTransform);
+    }
+
+    if (d->fillMode >= Tile)
+        p->drawTiledPixmap(QRectF(0, 0, drawWidth, drawHeight), d->pix);
+    else
+        p->drawPixmap(QRectF(0, 0, drawWidth, drawHeight), d->pix, QRectF(0, 0, drawWidth, drawHeight));
+
+    if (d->smooth) {
+        p->setRenderHint(QPainter::Antialiasing, oldAA);
+        p->setRenderHint(QPainter::SmoothPixmapTransform, oldSmooth);
+    }
+    if (doClip)
+        p->restore();
+    if (!transform.isIdentity())
+        p->setWorldTransform(oldTransform);
+}
+
+void QDeclarativeImage::pixmapChange()
+{
+    Q_D(QDeclarativeImage);
+    // PreserveAspectFit calculates the implicit size differently so we
+    // don't call our superclass pixmapChange(), since that would
+    // result in the implicit size being set incorrectly, then updated
+    // in updatePaintedGeometry()
+    if (d->fillMode != PreserveAspectFit)
+        QDeclarativeImageBase::pixmapChange();
+    updatePaintedGeometry();
+}
+
+QT_END_NAMESPACE