qquickborderimage.cpp

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "qquickborderimage_p.h"
#include "qquickborderimage_p_p.h"
 
#include <QtQml/qqmlinfo.h>
#include <QtQml/qqmlfile.h>
#include <QtQml/qqmlengine.h>
#if QT_CONFIG(qml_network)
#include <QtNetwork/qnetworkreply.h>
#endif
#include <QtCore/qfile.h>
#include <QtCore/qmath.h>
#include <QtGui/qguiapplication.h>
 
#include <private/qqmlglobal_p.h>
#include <private/qsgadaptationlayer_p.h>
 
QT_BEGIN_NAMESPACE
 
 
QQuickBorderImage::QQuickBorderImage(QQuickItem *parent)
: QQuickImageBase(*(new QQuickBorderImagePrivate), parent)
{
    connect(this, &QQuickImageBase::sourceSizeChanged, this, &QQuickBorderImage::sourceSizeChanged);
}
 
QQuickBorderImage::~QQuickBorderImage()
{
#if QT_CONFIG(qml_network)
    Q_D(QQuickBorderImage);
    if (d->sciReply)
        d->sciReply->deleteLater();
#endif
}
 
void QQuickBorderImage::setSource(const QUrl &url)
{
    Q_D(QQuickBorderImage);
 
    if (url == d->url)
        return;
 
#if QT_CONFIG(qml_network)
    if (d->sciReply) {
        d->sciReply->deleteLater();
        d->sciReply = nullptr;
    }
#endif
 
    d->url = url;
    d->sciurl = QUrl();
    emit sourceChanged(d->url);
 
    if (isComponentComplete())
        load();
}
 
void QQuickBorderImage::load()
{
    Q_D(QQuickBorderImage);
 
    if (d->url.isEmpty()) {
        loadEmptyUrl();
    } else {
        if (d->url.path().endsWith(QLatin1String("sci"))) {
            const QQmlContext *context = qmlContext(this);
            QString lf = QQmlFile::urlToLocalFileOrQrc(context ? context->resolvedUrl(d->url)
                                                               : d->url);
            if (!lf.isEmpty()) {
                QFile file(lf);
                if (!file.open(QIODevice::ReadOnly))
                    d->setStatus(Error);
                else
                    setGridScaledImage(QQuickGridScaledImage(&file));
            } else {
#if QT_CONFIG(qml_network)
                d->setProgress(0);
                d->setStatus(Loading);
 
                QNetworkRequest req(d->url);
                d->sciReply = qmlEngine(this)->networkAccessManager()->get(req);
                qmlobject_connect(d->sciReply, QNetworkReply, SIGNAL(finished()),
                                  this, QQuickBorderImage, SLOT(sciRequestFinished()));
#endif
            }
        } else {
            loadPixmap(d->url, LoadPixmapOptions(HandleDPR | UseProviderOptions));
        }
    }
}
 
QQuickScaleGrid *QQuickBorderImage::border()
{
    Q_D(QQuickBorderImage);
    return d->getScaleGrid();
}
 
QQuickBorderImage::TileMode QQuickBorderImage::horizontalTileMode() const
{
    Q_D(const QQuickBorderImage);
    return d->horizontalTileMode;
}
 
void QQuickBorderImage::setHorizontalTileMode(TileMode t)
{
    Q_D(QQuickBorderImage);
    if (t != d->horizontalTileMode) {
        d->horizontalTileMode = t;
        emit horizontalTileModeChanged();
        update();
    }
}
 
QQuickBorderImage::TileMode QQuickBorderImage::verticalTileMode() const
{
    Q_D(const QQuickBorderImage);
    return d->verticalTileMode;
}
 
void QQuickBorderImage::setVerticalTileMode(TileMode t)
{
    Q_D(QQuickBorderImage);
    if (t != d->verticalTileMode) {
        d->verticalTileMode = t;
        emit verticalTileModeChanged();
        update();
    }
}
 
void QQuickBorderImage::setGridScaledImage(const QQuickGridScaledImage& sci)
{
    Q_D(QQuickBorderImage);
    if (!sci.isValid()) {
        d->setStatus(Error);
    } else {
        QQuickScaleGrid *sg = border();
        sg->setTop(sci.gridTop());
        sg->setBottom(sci.gridBottom());
        sg->setLeft(sci.gridLeft());
        sg->setRight(sci.gridRight());
        d->horizontalTileMode = sci.horizontalTileRule();
        d->verticalTileMode = sci.verticalTileRule();
 
        d->sciurl = d->url.resolved(QUrl(sci.pixmapUrl()));
        loadPixmap(d->sciurl);
    }
}
 
void QQuickBorderImage::requestFinished()
{
    Q_D(QQuickBorderImage);
 
    if (d->pendingPix != d->currentPix) {
        std::swap(d->pendingPix, d->currentPix);
        d->pendingPix->clear(this); // Clear the old image
    }
 
    const QSize impsize = d->currentPix->implicitSize();
    setImplicitSize(impsize.width() / d->devicePixelRatio, impsize.height() / d->devicePixelRatio);
 
    if (d->currentPix->isError()) {
        qmlWarning(this) << d->currentPix->error();
        d->setStatus(Error);
        d->setProgress(0);
    } else {
        d->setStatus(Ready);
        d->setProgress(1);
    }
 
    if (sourceSize() != d->oldSourceSize) {
        d->oldSourceSize = sourceSize();
        emit sourceSizeChanged();
    }
    if (d->frameCount != d->currentPix->frameCount()) {
        d->frameCount = d->currentPix->frameCount();
        emit frameCountChanged();
    }
 
    pixmapChange();
}
 
#if QT_CONFIG(qml_network)
void QQuickBorderImage::sciRequestFinished()
{
    Q_D(QQuickBorderImage);
 
    if (d->sciReply->error() != QNetworkReply::NoError) {
        d->setStatus(Error);
        d->sciReply->deleteLater();
        d->sciReply = nullptr;
    } else {
        QQuickGridScaledImage sci(d->sciReply);
        d->sciReply->deleteLater();
        d->sciReply = nullptr;
        setGridScaledImage(sci);
    }
}
#endif // qml_network
 
void QQuickBorderImage::doUpdate()
{
    update();
}
 
void QQuickBorderImagePrivate::calculateRects(const QQuickScaleGrid *border,
                                              const QSize &sourceSize,
                                              const QSizeF &targetSize,
                                              int horizontalTileMode,
                                              int verticalTileMode,
                                              qreal devicePixelRatio,
                                              QRectF *targetRect,
                                              QRectF *innerTargetRect,
                                              QRectF *innerSourceRect,
                                              QRectF *subSourceRect)
{
    *innerSourceRect = QRectF(0, 0, 1, 1);
    *targetRect = QRectF(0, 0, targetSize.width(), targetSize.height());
    *innerTargetRect = *targetRect;
 
    if (border) {
        qreal borderLeft = border->left() * devicePixelRatio;
        qreal borderRight = border->right() * devicePixelRatio;
        qreal borderTop = border->top() * devicePixelRatio;
        qreal borderBottom = border->bottom() * devicePixelRatio;
        if (borderLeft + borderRight > sourceSize.width() && borderLeft < sourceSize.width())
            borderRight = sourceSize.width() - borderLeft;
        if (borderTop + borderBottom > sourceSize.height() && borderTop < sourceSize.height())
            borderBottom = sourceSize.height() - borderTop;
        *innerSourceRect = QRectF(QPointF(borderLeft / qreal(sourceSize.width()),
                                          borderTop / qreal(sourceSize.height())),
                                  QPointF((sourceSize.width() - borderRight) / qreal(sourceSize.width()),
                                          (sourceSize.height() - borderBottom) / qreal(sourceSize.height()))),
        *innerTargetRect = QRectF(border->left(),
                                  border->top(),
                                  qMax<qreal>(0, targetSize.width() - (border->right() + border->left())),
                                  qMax<qreal>(0, targetSize.height() - (border->bottom() + border->top())));
    }
 
    qreal hTiles = 1;
    qreal vTiles = 1;
    const QSizeF innerTargetSize = innerTargetRect->size() * devicePixelRatio;
    if (innerSourceRect->width() <= 0)
        hTiles = 0;
    else if (horizontalTileMode != QQuickBorderImage::Stretch) {
        hTiles = innerTargetSize.width() / qreal(innerSourceRect->width() * sourceSize.width());
        if (horizontalTileMode == QQuickBorderImage::Round)
            hTiles = qCeil(hTiles);
    }
    if (innerSourceRect->height() <= 0)
        vTiles = 0;
    else if (verticalTileMode != QQuickBorderImage::Stretch) {
        vTiles = innerTargetSize.height() / qreal(innerSourceRect->height() * sourceSize.height());
        if (verticalTileMode == QQuickBorderImage::Round)
            vTiles = qCeil(vTiles);
    }
 
    *subSourceRect = QRectF(0, 0, hTiles, vTiles);
}
 
 
QSGNode *QQuickBorderImage::updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *)
{
    Q_D(QQuickBorderImage);
 
    QSGTexture *texture = d->sceneGraphRenderContext()->textureForFactory(d->currentPix->textureFactory(), window());
 
    if (!texture || width() <= 0 || height() <= 0) {
        delete oldNode;
        return nullptr;
    }
 
    QSGInternalImageNode *node = static_cast<QSGInternalImageNode *>(oldNode);
 
    bool updatePixmap = d->pixmapChanged;
    d->pixmapChanged = false;
    if (!node) {
        node = d->sceneGraphContext()->createInternalImageNode(d->sceneGraphRenderContext());
        updatePixmap = true;
    }
 
    if (updatePixmap)
        node->setTexture(texture);
 
    // Don't implicitly create the scalegrid in the rendering thread...
    QRectF targetRect;
    QRectF innerTargetRect;
    QRectF innerSourceRect;
    QRectF subSourceRect;
    d->calculateRects(d->border,
                      QSize(d->currentPix->width(), d->currentPix->height()), QSizeF(width(), height()),
                      d->horizontalTileMode, d->verticalTileMode, d->devicePixelRatio,
                      &targetRect, &innerTargetRect,
                      &innerSourceRect, &subSourceRect);
 
    node->setTargetRect(targetRect);
    node->setInnerSourceRect(innerSourceRect);
    node->setInnerTargetRect(innerTargetRect);
    node->setSubSourceRect(subSourceRect);
    node->setMirror(d->mirrorHorizontally, d->mirrorVertically);
 
    node->setMipmapFiltering(QSGTexture::None);
    node->setFiltering(d->smooth ? QSGTexture::Linear : QSGTexture::Nearest);
    if (innerSourceRect == QRectF(0, 0, 1, 1) && (subSourceRect.width() > 1 || subSourceRect.height() > 1)) {
        node->setHorizontalWrapMode(QSGTexture::Repeat);
        node->setVerticalWrapMode(QSGTexture::Repeat);
    } else {
        node->setHorizontalWrapMode(QSGTexture::ClampToEdge);
        node->setVerticalWrapMode(QSGTexture::ClampToEdge);
    }
    node->setAntialiasing(d->antialiasing);
    node->update();
 
    return node;
}
 
void QQuickBorderImage::pixmapChange()
{
    Q_D(QQuickBorderImage);
    d->pixmapChanged = true;
    update();
}
 
QT_END_NAMESPACE
 
#include "moc_qquickborderimage_p.cpp"