matrixion/src/BlurhashProvider.h

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// SPDX-FileCopyrightText: 2021 Nheko Contributors
// SPDX-FileCopyrightText: 2022 Nheko Contributors
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//
// SPDX-License-Identifier: GPL-3.0-or-later
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#pragma once
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#include <QQuickAsyncImageProvider>
#include <QQuickImageResponse>
#include <QImage>
#include <QThreadPool>
class BlurhashRunnable
: public QObject
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, public QRunnable
{
Q_OBJECT
public:
BlurhashRunnable(const QString &id, const QSize &requestedSize)
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: m_id(id)
, m_requestedSize(requestedSize)
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{
}
void run() override;
signals:
void done(QImage);
void error(QString);
private:
QString m_id;
QSize m_requestedSize;
};
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class BlurhashResponse : public QQuickImageResponse
{
public:
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BlurhashResponse(const QString &id, const QSize &requestedSize)
{
auto runnable = new BlurhashRunnable(id, requestedSize);
connect(runnable, &BlurhashRunnable::done, this, &BlurhashResponse::handleDone);
connect(runnable, &BlurhashRunnable::error, this, &BlurhashResponse::handleError);
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QThreadPool::globalInstance()->start(runnable);
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}
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QQuickTextureFactory *textureFactory() const override
{
return QQuickTextureFactory::textureFactoryForImage(m_image);
}
QString errorString() const override { return m_error; }
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void handleDone(QImage image)
{
m_image = std::move(image);
emit finished();
}
void handleError(QString error)
{
m_error = error;
emit finished();
}
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QString m_error;
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QImage m_image;
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};
class BlurhashProvider
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:
#if QT_VERSION < 0x60000
public QObject
,
#endif
public QQuickAsyncImageProvider
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{
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Q_OBJECT
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public slots:
QQuickImageResponse *
requestImageResponse(const QString &id, const QSize &requestedSize) override
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{
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return new BlurhashResponse(id, requestedSize);
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}
};