6371d623d2
The example refines the image by running a number of passes with increasing number of iterations, which is not really visible to the user. Set an informational text string on the generated image which provides this information along with the elapsed time. The idea is to do the same to the corresponding Qt for Python example to have some sort of speed comparison for number crunching. Add a command line option for the number of passes. Make the window a bit larger to accommodate the information. Change-Id: I2afc1009ab53b580123d82a6aa645d9ffaa63ea2 Reviewed-by: Paul Wicking <paul.wicking@qt.io> (cherry picked from commit 0e69349f6f8e9445877ea5b2105973115ad79cf7)
105 lines
3.4 KiB
C++
105 lines
3.4 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2021 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#ifndef RENDERTHREAD_H
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#define RENDERTHREAD_H
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#include <QMutex>
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#include <QSize>
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#include <QThread>
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#include <QWaitCondition>
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QT_BEGIN_NAMESPACE
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class QImage;
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QT_END_NAMESPACE
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//! [0]
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class RenderThread : public QThread
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{
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Q_OBJECT
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public:
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RenderThread(QObject *parent = nullptr);
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~RenderThread();
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void render(double centerX, double centerY, double scaleFactor, QSize resultSize,
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double devicePixelRatio);
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static void setNumPasses(int n) { numPasses = n; }
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static QString infoKey() { return QStringLiteral("info"); }
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signals:
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void renderedImage(const QImage &image, double scaleFactor);
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protected:
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void run() override;
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private:
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static uint rgbFromWaveLength(double wave);
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QMutex mutex;
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QWaitCondition condition;
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double centerX;
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double centerY;
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double scaleFactor;
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double devicePixelRatio;
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QSize resultSize;
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static int numPasses;
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bool restart = false;
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bool abort = false;
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enum { ColormapSize = 512 };
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uint colormap[ColormapSize];
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};
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//! [0]
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#endif // RENDERTHREAD_H
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