diff options
Diffstat (limited to 'examples/corelib/threads/mandelbrot/renderthread.cpp')
| -rw-r--r-- | examples/corelib/threads/mandelbrot/renderthread.cpp | 82 |
1 files changed, 27 insertions, 55 deletions
diff --git a/examples/corelib/threads/mandelbrot/renderthread.cpp b/examples/corelib/threads/mandelbrot/renderthread.cpp index 4d2009471c..77a14a6ac1 100644 --- a/examples/corelib/threads/mandelbrot/renderthread.cpp +++ b/examples/corelib/threads/mandelbrot/renderthread.cpp @@ -1,58 +1,16 @@ -/**************************************************************************** -** -** Copyright (C) 2016 The Qt Company Ltd. -** Contact: https://www.qt.io/licensing/ -** -** This file is part of the examples of the Qt Toolkit. -** -** $QT_BEGIN_LICENSE:BSD$ -** Commercial License Usage -** Licensees holding valid commercial Qt licenses may use this file in -** accordance with the commercial license agreement provided with the -** Software or, alternatively, in accordance with the terms contained in -** a written agreement between you and The Qt Company. For licensing terms -** and conditions see https://www.qt.io/terms-conditions. For further -** information use the contact form at https://www.qt.io/contact-us. -** -** BSD License Usage -** Alternatively, you may use this file under the terms of the BSD license -** as follows: -** -** "Redistribution and use in source and binary forms, with or without -** modification, are permitted provided that the following conditions are -** met: -** * Redistributions of source code must retain the above copyright -** notice, this list of conditions and the following disclaimer. -** * Redistributions in binary form must reproduce the above copyright -** notice, this list of conditions and the following disclaimer in -** the documentation and/or other materials provided with the -** distribution. -** * Neither the name of The Qt Company Ltd nor the names of its -** contributors may be used to endorse or promote products derived -** from this software without specific prior written permission. -** -** -** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." -** -** $QT_END_LICENSE$ -** -****************************************************************************/ +// Copyright (C) 2021 The Qt Company Ltd. +// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause #include "renderthread.h" #include <QImage> +#include <QElapsedTimer> +#include <QTextStream> + #include <cmath> +int RenderThread::numPasses = 8; + //! [0] RenderThread::RenderThread(QObject *parent) : QThread(parent) @@ -98,6 +56,7 @@ void RenderThread::render(double centerX, double centerY, double scaleFactor, //! [3] void RenderThread::run() { + QElapsedTimer timer; forever { mutex.lock(); const double devicePixelRatio = this->devicePixelRatio; @@ -110,19 +69,20 @@ void RenderThread::run() //! [3] //! [4] - int halfWidth = resultSize.width() / 2; + const int halfWidth = resultSize.width() / 2; //! [4] //! [5] - int halfHeight = resultSize.height() / 2; + const int halfHeight = resultSize.height() / 2; QImage image(resultSize, QImage::Format_RGB32); image.setDevicePixelRatio(devicePixelRatio); - const int NumPasses = 8; int pass = 0; - while (pass < NumPasses) { + while (pass < numPasses) { const int MaxIterations = (1 << (2 * pass + 6)) + 32; - const int Limit = 4; + constexpr int Limit = 4; bool allBlack = true; + timer.restart(); + for (int y = -halfHeight; y < halfHeight; ++y) { if (restart) break; @@ -165,8 +125,20 @@ void RenderThread::run() if (allBlack && pass == 0) { pass = 4; } else { - if (!restart) + if (!restart) { + QString message; + QTextStream str(&message); + str << " Pass " << (pass + 1) << '/' << numPasses + << ", max iterations: " << MaxIterations << ", time: "; + const auto elapsed = timer.elapsed(); + if (elapsed > 2000) + str << (elapsed / 1000) << 's'; + else + str << elapsed << "ms"; + image.setText(infoKey(), message); + emit renderedImage(image, requestedScaleFactor); + } //! [5] //! [6] ++pass; } |