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Diffstat (limited to 'src/declarative/items/qquickimage.cpp')
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diff --git a/src/declarative/items/qquickimage.cpp b/src/declarative/items/qquickimage.cpp deleted file mode 100644 index 46b8ea0915..0000000000 --- a/src/declarative/items/qquickimage.cpp +++ /dev/null @@ -1,746 +0,0 @@ -/**************************************************************************** -** -** 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. -** -** $QT_BEGIN_LICENSE:LGPL$ -** GNU Lesser General Public License Usage -** 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. -** -** GNU General Public License Usage -** Alternatively, this file may be used under the terms of the GNU General -** Public License version 3.0 as published by the Free Software Foundation -** and appearing in the file LICENSE.GPL included in the packaging of this -** file. Please review the following information to ensure the GNU General -** Public License version 3.0 requirements will be met: -** http://www.gnu.org/copyleft/gpl.html. -** -** Other Usage -** Alternatively, this file may be used in accordance with the terms and -** conditions contained in a signed written agreement between you and Nokia. -** -** -** -** -** -** $QT_END_LICENSE$ -** -****************************************************************************/ - -#include "qquickimage_p.h" -#include "qquickimage_p_p.h" - -#include <private/qsgtextureprovider_p.h> - -#include <private/qsgcontext_p.h> -#include <private/qsgadaptationlayer_p.h> - -#include <QtGui/qpainter.h> -#include <qmath.h> - -QT_BEGIN_NAMESPACE - -class QQuickImageTextureProvider : public QSGTextureProvider -{ - Q_OBJECT -public: - QQuickImageTextureProvider() - : m_texture(0) - , m_smooth(false) - { - } - - QSGTexture *texture() const { - - if (m_texture && m_texture->isAtlasTexture()) - const_cast<QQuickImageTextureProvider *>(this)->m_texture = m_texture->removedFromAtlas(); - - if (m_texture) { - m_texture->setFiltering(m_smooth ? QSGTexture::Linear : QSGTexture::Nearest); - m_texture->setMipmapFiltering(QSGTexture::Nearest); - m_texture->setHorizontalWrapMode(QSGTexture::ClampToEdge); - m_texture->setVerticalWrapMode(QSGTexture::ClampToEdge); - } - return m_texture; - } - - friend class QQuickImage; - - QSGTexture *m_texture; - bool m_smooth; -}; - -#include "qquickimage.moc" - -QQuickImagePrivate::QQuickImagePrivate() - : fillMode(QQuickImage::Stretch) - , paintedWidth(0) - , paintedHeight(0) - , pixmapChanged(false) - , hAlign(QQuickImage::AlignHCenter) - , vAlign(QQuickImage::AlignVCenter) - , provider(0) -{ -} - -/*! - \qmlclass Image QQuickImage - \inqmlmodule QtQuick 2 - \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 -*/ - -QQuickImage::QQuickImage(QQuickItem *parent) - : QQuickImageBase(*(new QQuickImagePrivate), parent) -{ -} - -QQuickImage::QQuickImage(QQuickImagePrivate &dd, QQuickItem *parent) - : QQuickImageBase(dd, parent) -{ -} - -QQuickImage::~QQuickImage() -{ - Q_D(QQuickImage); - if (d->provider) - d->provider->deleteLater(); -} - -void QQuickImagePrivate::setImage(const QImage &image) -{ - Q_Q(QQuickImage); - pix.setImage(image); - - q->pixmapChange(); - status = pix.isNull() ? QQuickImageBase::Null : QQuickImageBase::Ready; - - q->update(); -} - -/*! - \qmlproperty enumeration QtQuick2::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 - \o Image.Pad - the image is not transformed - \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} -*/ -QQuickImage::FillMode QQuickImage::fillMode() const -{ - Q_D(const QQuickImage); - return d->fillMode; -} - -void QQuickImage::setFillMode(FillMode mode) -{ - Q_D(QQuickImage); - if (d->fillMode == mode) - return; - d->fillMode = mode; - update(); - updatePaintedGeometry(); - emit fillModeChanged(); -} - -/*! - - \qmlproperty real QtQuick2::Image::paintedWidth - \qmlproperty real QtQuick2::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 QQuickImage::paintedWidth() const -{ - Q_D(const QQuickImage); - return d->paintedWidth; -} - -qreal QQuickImage::paintedHeight() const -{ - Q_D(const QQuickImage); - return d->paintedHeight; -} - -/*! - \qmlproperty enumeration QtQuick2::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 QtQuick2::Image::progress - - This property holds the progress of image loading, from 0.0 (nothing loaded) - to 1.0 (finished). - - \sa status -*/ - -/*! - \qmlproperty bool QtQuick2::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 QtQuick2::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 intrinsically 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.} -*/ - -/*! - \qmlproperty url QtQuick2::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 QtQuick2::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 asynchronously. -*/ - -/*! - \qmlproperty bool QtQuick2::Image::cache - - 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 QtQuick2::Image::mirror - - This property holds whether the image should be horizontally inverted - (effectively displaying a mirrored image). - - The default value is false. -*/ - -/*! - \qmlproperty enumeration QtQuick2::Image::horizontalAlignment - \qmlproperty enumeration QtQuick2::Image::verticalAlignment - - Sets the horizontal and vertical alignment of the image. By default, the image is top-left aligned. - - The valid values for \c horizontalAlignment are \c Image.AlignLeft, \c Image.AlignRight and \c Image.AlignHCenter. - The valid values for \c verticalAlignment are \c Image.AlignTop, \c Image.AlignBottom - and \c Image.AlignVCenter. -*/ -void QQuickImage::updatePaintedGeometry() -{ - Q_D(QQuickImage); - - if (d->fillMode == PreserveAspectFit) { - if (!d->pix.width() || !d->pix.height()) { - setImplicitSize(0, 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; - } - qreal iHeight = (widthValid() && !heightValid()) ? d->paintedHeight : d->pix.height(); - qreal iWidth = (heightValid() && !widthValid()) ? d->paintedWidth : d->pix.width(); - setImplicitSize(iWidth, iHeight); - - } 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 if (d->fillMode == Pad) { - d->paintedWidth = d->pix.width(); - d->paintedHeight = d->pix.height(); - } else { - d->paintedWidth = width(); - d->paintedHeight = height(); - } - emit paintedGeometryChanged(); -} - -void QQuickImage::geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry) -{ - QQuickImageBase::geometryChanged(newGeometry, oldGeometry); - updatePaintedGeometry(); -} - -QRectF QQuickImage::boundingRect() const -{ - Q_D(const QQuickImage); - return QRectF(0, 0, qMax(width(), d->paintedWidth), qMax(height(), d->paintedHeight)); -} - -QSGTextureProvider *QQuickImage::textureProvider() const -{ - Q_D(const QQuickImage); - if (!d->provider) { - // Make sure it gets thread affinity on the rendering thread so deletion works properly.. - Q_ASSERT_X(d->canvas - && d->sceneGraphContext() - && QThread::currentThread() == d->sceneGraphContext()->thread(), - "QQuickImage::textureProvider", - "Cannot be used outside the GUI thread"); - QQuickImagePrivate *dd = const_cast<QQuickImagePrivate *>(d); - dd->provider = new QQuickImageTextureProvider; - dd->provider->m_smooth = d->smooth; - dd->provider->m_texture = d->sceneGraphContext()->textureForFactory(d->pix.textureFactory()); - } - - return d->provider; -} - -QSGNode *QQuickImage::updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *) -{ - Q_D(QQuickImage); - - QSGTexture *texture = d->sceneGraphContext()->textureForFactory(d->pix.textureFactory()); - - // Copy over the current texture state into the texture provider... - if (d->provider) { - d->provider->m_smooth = d->smooth; - d->provider->m_texture = texture; - } - - if (!texture || width() <= 0 || height() <= 0) { - delete oldNode; - return 0; - } - - QSGImageNode *node = static_cast<QSGImageNode *>(oldNode); - if (!node) { - d->pixmapChanged = true; - node = d->sceneGraphContext()->createImageNode(); - node->setTexture(texture); - } - - if (d->pixmapChanged) { - // force update the texture in the node to trigger reconstruction of - // geometry and the likes when a atlas segment has changed. - node->setTexture(0); - node->setTexture(texture); - d->pixmapChanged = false; - } - - QRectF targetRect; - QRectF sourceRect; - QSGTexture::WrapMode hWrap = QSGTexture::ClampToEdge; - QSGTexture::WrapMode vWrap = QSGTexture::ClampToEdge; - - qreal pixWidth = (d->fillMode == PreserveAspectFit) ? d->paintedWidth : d->pix.width(); - qreal pixHeight = (d->fillMode == PreserveAspectFit) ? d->paintedHeight : d->pix.height(); - - int xOffset = 0; - if (d->hAlign == QQuickImage::AlignHCenter) - xOffset = qCeil((width() - pixWidth) / 2.); - else if (d->hAlign == QQuickImage::AlignRight) - xOffset = qCeil(width() - pixWidth); - - int yOffset = 0; - if (d->vAlign == QQuickImage::AlignVCenter) - yOffset = qCeil((height() - pixHeight) / 2.); - else if (d->vAlign == QQuickImage::AlignBottom) - yOffset = qCeil(height() - pixHeight); - - switch (d->fillMode) { - default: - case Stretch: - targetRect = QRectF(0, 0, width(), height()); - sourceRect = d->pix.rect(); - break; - - case PreserveAspectFit: - targetRect = QRectF(xOffset, yOffset, d->paintedWidth, d->paintedHeight); - sourceRect = d->pix.rect(); - break; - - case PreserveAspectCrop: { - targetRect = QRect(0, 0, width(), height()); - qreal wscale = width() / qreal(d->pix.width()); - qreal hscale = height() / qreal(d->pix.height()); - - if (wscale > hscale) { - int src = (hscale / wscale) * qreal(d->pix.height()); - int y = 0; - if (d->vAlign == QQuickImage::AlignVCenter) - y = qCeil((d->pix.height() - src) / 2.); - else if (d->vAlign == QQuickImage::AlignBottom) - y = qCeil(d->pix.height() - src); - sourceRect = QRectF(0, y, d->pix.width(), src); - - } else { - int src = (wscale / hscale) * qreal(d->pix.width()); - int x = 0; - if (d->hAlign == QQuickImage::AlignHCenter) - x = qCeil((d->pix.width() - src) / 2.); - else if (d->hAlign == QQuickImage::AlignRight) - x = qCeil(d->pix.width() - src); - sourceRect = QRectF(x, 0, src, d->pix.height()); - } - } - break; - - case Tile: - targetRect = QRectF(0, 0, width(), height()); - sourceRect = QRectF(-xOffset, -yOffset, width(), height()); - hWrap = QSGTexture::Repeat; - vWrap = QSGTexture::Repeat; - break; - - case TileHorizontally: - targetRect = QRectF(0, 0, width(), height()); - sourceRect = QRectF(-xOffset, 0, width(), d->pix.height()); - hWrap = QSGTexture::Repeat; - break; - - case TileVertically: - targetRect = QRectF(0, 0, width(), height()); - sourceRect = QRectF(0, -yOffset, d->pix.width(), height()); - vWrap = QSGTexture::Repeat; - break; - - case Pad: - qreal w = qMin(qreal(d->pix.width()), width()); - qreal h = qMin(qreal(d->pix.height()), height()); - qreal x = (d->pix.width() > width()) ? -xOffset : 0; - qreal y = (d->pix.height() > height()) ? -yOffset : 0; - targetRect = QRectF(x + xOffset, y + yOffset, w, h); - sourceRect = QRectF(x, y, w, h); - break; - }; - - QRectF nsrect(sourceRect.x() / d->pix.width(), - sourceRect.y() / d->pix.height(), - sourceRect.width() / d->pix.width(), - sourceRect.height() / d->pix.height()); - - if (d->mirror) { - qreal oldLeft = nsrect.left(); - nsrect.setLeft(nsrect.right()); - nsrect.setRight(oldLeft); - } - - node->setHorizontalWrapMode(hWrap); - node->setVerticalWrapMode(vWrap); - node->setFiltering(d->smooth ? QSGTexture::Linear : QSGTexture::Nearest); - - node->setTargetRect(targetRect); - node->setSourceRect(nsrect); - node->update(); - - return node; -} - -void QQuickImage::pixmapChange() -{ - Q_D(QQuickImage); - // 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) - QQuickImageBase::pixmapChange(); - updatePaintedGeometry(); - d->pixmapChanged = true; - - // When the pixmap changes, such as being deleted, we need to update the textures - update(); -} - -QQuickImage::VAlignment QQuickImage::verticalAlignment() const -{ - Q_D(const QQuickImage); - return d->vAlign; -} - -void QQuickImage::setVerticalAlignment(VAlignment align) -{ - Q_D(QQuickImage); - if (d->vAlign == align) - return; - - d->vAlign = align; - update(); - updatePaintedGeometry(); - emit verticalAlignmentChanged(align); -} - -QQuickImage::HAlignment QQuickImage::horizontalAlignment() const -{ - Q_D(const QQuickImage); - return d->hAlign; -} - -void QQuickImage::setHorizontalAlignment(HAlignment align) -{ - Q_D(QQuickImage); - if (d->hAlign == align) - return; - - d->hAlign = align; - update(); - updatePaintedGeometry(); - emit horizontalAlignmentChanged(align); -} - -QT_END_NAMESPACE |