77 lines
2.1 KiB
C++
77 lines
2.1 KiB
C++
#include "imageprovider.h"
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#include <QFile>
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#include <QMetaObject>
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#include <QStandardPaths>
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#include <QtCore/QDebug>
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#include <QtCore/QWaitCondition>
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#include "jobs/mediathumbnailjob.h"
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#include "connection.h"
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using QMatrixClient::MediaThumbnailJob;
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ImageProvider::ImageProvider(QObject* parent)
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: QObject(parent),
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QQuickImageProvider(
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QQmlImageProviderBase::Image,
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QQmlImageProviderBase::ForceAsynchronousImageLoading) {}
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QImage ImageProvider::requestImage(const QString& id, QSize* pSize,
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const QSize& requestedSize) {
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if (!id.startsWith("mxc://")) {
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qWarning() << "ImageProvider: won't fetch an invalid id:" << id
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<< "doesn't follow server/mediaId pattern";
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return {};
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}
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QUrl mxcUri{id};
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QImage result = image(mxcUri, requestedSize);
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if (result.isNull()) return {};
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if (!requestedSize.isEmpty() && result.size() != requestedSize) {
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QImage scaled = result.scaled(requestedSize, Qt::KeepAspectRatio,
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Qt::SmoothTransformation);
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if (pSize != nullptr) *pSize = scaled.size();
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return scaled;
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}
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if (pSize != nullptr) *pSize = result.size();
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return result;
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}
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QImage ImageProvider::image(const QUrl& mxc, const QSize& size) {
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QUrl tempfilePath = QUrl::fromLocalFile(
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QStandardPaths::writableLocation(QStandardPaths::CacheLocation) + "/" +
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mxc.fileName() + ".png");
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QImage cachedImage;
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if (cachedImage.load(tempfilePath.toLocalFile())) {
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return cachedImage;
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}
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MediaThumbnailJob* job = nullptr;
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QReadLocker locker(&m_lock);
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QMetaObject::invokeMethod(
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m_connection, [=] { return m_connection->getThumbnail(mxc, size); },
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Qt::BlockingQueuedConnection, &job);
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if (!job) {
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qDebug() << "ImageProvider: failed to send a request";
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return {};
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}
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QImage result;
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{
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QWaitCondition condition; // The most compact way to block on a signal
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job->connect(job, &MediaThumbnailJob::finished, job, [&] {
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result = job->thumbnail();
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condition.wakeAll();
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});
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condition.wait(&m_lock);
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}
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result.save(tempfilePath.toLocalFile());
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return result;
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}
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