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# renderthread.h Example File
threads/mandelbrot/renderthread.h

        #ifndef RENDERTHREAD_H
        #define RENDERTHREAD_H

        #include <QMutex>
        #include <QSize>
        #include <QThread>
        #include <QWaitCondition>

        class QImage;

        class RenderThread : public QThread
        {
            Q_OBJECT

        public:
            RenderThread(QObject *parent = 0);
            ~RenderThread();

            void render(double centerX, double centerY, double scaleFactor,
                        QSize resultSize);

        signals:
            void renderedImage(const QImage &image, double scaleFactor);

        protected:
            void run();

        private:
            uint rgbFromWaveLength(double wave);

            QMutex mutex;
            QWaitCondition condition;
            double centerX;
            double centerY;
            double scaleFactor;
            QSize resultSize;
            bool restart;
            bool abort;

            enum { ColormapSize = 512 };
            uint colormap[ColormapSize];
        };

        #endif