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50
51#ifndef RENDERTHREAD_H
52#define RENDERTHREAD_H
53
54#include <QMutex>
55#include <QSize>
56#include <QThread>
57#include <QWaitCondition>
58
59QT_BEGIN_NAMESPACE
60class QImage;
61QT_END_NAMESPACE
62
63//! [0]
64class RenderThread : public QThread
65{
66 Q_OBJECT
67
68public:
69 RenderThread(QObject *parent = nullptr);
70 ~RenderThread();
71
72 void render(double centerX, double centerY, double scaleFactor, QSize resultSize,
73 double devicePixelRatio);
74
75signals:
76 void renderedImage(const QImage &image, double scaleFactor);
77
78protected:
79 void run() override;
80
81private:
82 static uint rgbFromWaveLength(double wave);
83
84 QMutex mutex;
85 QWaitCondition condition;
86 double centerX;
87 double centerY;
88 double scaleFactor;
89 double devicePixelRatio;
90 QSize resultSize;
91 bool restart = false;
92 bool abort = false;
93
94 enum { ColormapSize = 512 };
95 uint colormap[ColormapSize];
96};
97//! [0]
98
99#endif // RENDERTHREAD_H
100

source code of qtbase/examples/corelib/threads/mandelbrot/renderthread.h