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Diffstat (limited to 'src/imports/sharedimage/sharedimageprovider.cpp')
| -rw-r--r-- | src/imports/sharedimage/sharedimageprovider.cpp | 156 |
1 files changed, 156 insertions, 0 deletions
diff --git a/src/imports/sharedimage/sharedimageprovider.cpp b/src/imports/sharedimage/sharedimageprovider.cpp new file mode 100644 index 0000000000..2dd3a130e9 --- /dev/null +++ b/src/imports/sharedimage/sharedimageprovider.cpp @@ -0,0 +1,156 @@ +/**************************************************************************** +** +** Copyright (C) 2017 The Qt Company Ltd. +** Contact: https://www.qt.io/licensing/ +** +** This file is part of the plugins of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** Commercial License Usage +** Licensees holding valid commercial Qt licenses may use this file in +** accordance with the commercial license agreement provided with the +** Software or, alternatively, in accordance with the terms contained in +** a written agreement between you and The Qt Company. For licensing terms +** and conditions see https://www.qt.io/terms-conditions. For further +** information use the contact form at https://www.qt.io/contact-us. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 3 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL3 included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 3 requirements +** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 2.0 or (at your option) the GNU General +** Public license version 3 or any later version approved by the KDE Free +** Qt Foundation. The licenses are as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 +** included in the packaging of this file. Please review the following +** information to ensure the GNU General Public License requirements will +** be met: https://www.gnu.org/licenses/gpl-2.0.html and +** https://www.gnu.org/licenses/gpl-3.0.html. +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <sharedimageprovider.h> +#include <qsharedimageloader_p.h> +#include <qquickimageprovider.h> +#include <private/qimage_p.h> +#include <QImageReader> +#include <QFileInfo> +#include <QDir> + +class QuickSharedImageLoader : public QSharedImageLoader +{ + Q_OBJECT + friend class SharedImageProvider; + +public: + QuickSharedImageLoader(QObject *parent = Q_NULLPTR) + : QSharedImageLoader(parent) + { + } + +protected: + QImage loadFile(const QString &path, ImageParameters *params) override + { + QImageReader imgio(path); + QSize realSize = imgio.size(); + QSize requestSize = params ? params->value(RequestedSize).toSize() : QSize(); + + // Following qquickpixmapcache's readImage, from here... + const bool force_scale = imgio.format() == "svg" || imgio.format() == "svgz"; + + if (requestSize.width() > 0 || requestSize.height() > 0) { + QSize s = realSize; + qreal ratio = 0.0; + if (requestSize.width() && (force_scale || requestSize.width() < s.width())) { + ratio = qreal(requestSize.width())/s.width(); + } + if (requestSize.height() && (force_scale || requestSize.height() < s.height())) { + qreal hr = qreal(requestSize.height())/s.height(); + if (ratio == 0.0 || hr < ratio) + ratio = hr; + } + if (ratio > 0.0) { + s.setHeight(qRound(s.height() * ratio)); + s.setWidth(qRound(s.width() * ratio)); + imgio.setScaledSize(s); + } + } + // ... to here + + QImage image; + if (imgio.read(&image)) { + if (realSize.isEmpty()) + realSize = image.size(); + // Make sure we have acceptable format for texture uploader, or it will convert & lose sharing + // This mimics the testing & conversion normally done by the quick pixmapcache & texturefactory + if (image.format() != QImage::Format_RGB32 && image.format() != QImage::Format_ARGB32_Premultiplied) { + QImage::Format newFmt = QImage::Format_RGB32; + if (image.hasAlphaChannel() && image.data_ptr()->checkForAlphaPixels()) + newFmt = QImage::Format_ARGB32_Premultiplied; + qCDebug(lcSharedImage) << "Convert on load from format" << image.format() << "to" << newFmt; + image = image.convertToFormat(newFmt); + } + } + + if (params && params->count() > OriginalSize) + params->replace(OriginalSize, realSize); + + return image; + } + + QString key(const QString &path, ImageParameters *params) override + { + QSize reqSz = params->value(RequestedSize).toSize(); + if (!reqSz.isValid()) + return path; + + QString key = path + QStringLiteral("_%1x%2").arg(reqSz.width()).arg(reqSz.height()); + qCDebug(lcSharedImage) << "KEY:" << key; + return key; + } +}; + + +SharedImageProvider::SharedImageProvider() + : QQuickImageProvider(QQuickImageProvider::Image), loader(new QuickSharedImageLoader) +{ +} + +QImage SharedImageProvider::requestImage(const QString &id, QSize *size, const QSize &requestedSize) +{ + QFileInfo fi(QDir::root(), id); + QString path = fi.canonicalFilePath(); + if (path.isEmpty()) + return QImage(); + + QSharedImageLoader::ImageParameters params(QSharedImageLoader::NumImageParameters); + params[QSharedImageLoader::RequestedSize].setValue(requestedSize); + + QImage img = loader->load(path, ¶ms); + if (img.isNull()) { + // May be sharing problem, fall back to normal local load + img = loader->loadFile(path, ¶ms); + if (!img.isNull()) + qCWarning(lcSharedImage) << "Sharing problem; loading" << id << "unshared"; + } + + //... QSize realSize = params.value(QSharedImageLoader::OriginalSize).toSize(); + // quickpixmapcache's readImage() reports back the original size, prior to requestedSize scaling, in the *size + // parameter. That value is currently ignored by quick however, which only cares about the present size of the + // returned image. So handling and sharing of info on pre-scaled size is currently not implemented. + if (size) { + *size = img.size(); + } + + return img; +} + +#include "sharedimageprovider.moc" |