Revision control
++ // Copyright (C) 2021 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #ifndef RENDERTHREAD_H
++ #define RENDERTHREAD_H
++
++ #include <QMutex>
++ #include <QSize>
++ #include <QThread>
++ #include <QWaitCondition>
++
++ QT_BEGIN_NAMESPACE
++ class QImage;
++ QT_END_NAMESPACE
++
++ //! [0]
++ class RenderThread : public QThread
++ {
++ Q_OBJECT
++
++ public:
++ RenderThread(QObject *parent = nullptr);
++ ~RenderThread();
++
++ void render(double centerX, double centerY, double scaleFactor, QSize resultSize,
++ double devicePixelRatio);
++
++ static void setNumPasses(int n) { numPasses = n; }
++
++ static QString infoKey() { return QStringLiteral("info"); }
++
++ signals:
++ void renderedImage(const QImage &image, double scaleFactor);
++
++ protected:
++ void run() override;
++
++ private:
++ static uint rgbFromWaveLength(double wave);
++
++ QMutex mutex;
++ QWaitCondition condition;
++ double centerX;
++ double centerY;
++ double scaleFactor;
++ double devicePixelRatio;
++ QSize resultSize;
++ static int numPasses;
++ bool restart = false;
++ bool abort = false;
++
++ static constexpr int ColormapSize = 512;
++ uint colormap[ColormapSize];
++ };
++ //! [0]
++
++ #endif // RENDERTHREAD_H