diff options
Diffstat (limited to 'examples/corelib/threads/mandelbrot/renderthread.cpp')
| -rw-r--r-- | examples/corelib/threads/mandelbrot/renderthread.cpp | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/examples/corelib/threads/mandelbrot/renderthread.cpp b/examples/corelib/threads/mandelbrot/renderthread.cpp index 4d2009471c..1f2af3b999 100644 --- a/examples/corelib/threads/mandelbrot/renderthread.cpp +++ b/examples/corelib/threads/mandelbrot/renderthread.cpp @@ -1,6 +1,6 @@ /**************************************************************************** ** -** Copyright (C) 2016 The Qt Company Ltd. +** Copyright (C) 2021 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. @@ -51,8 +51,14 @@ #include "renderthread.h" #include <QImage> + +#include <QElapsedTimer> +#include <QTextStream> + #include <cmath> +int RenderThread::numPasses = 8; + //! [0] RenderThread::RenderThread(QObject *parent) : QThread(parent) @@ -98,6 +104,7 @@ void RenderThread::render(double centerX, double centerY, double scaleFactor, //! [3] void RenderThread::run() { + QElapsedTimer timer; forever { mutex.lock(); const double devicePixelRatio = this->devicePixelRatio; @@ -116,13 +123,14 @@ void RenderThread::run() 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; bool allBlack = true; + timer.restart(); + for (int y = -halfHeight; y < halfHeight; ++y) { if (restart) break; @@ -165,8 +173,20 @@ 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; } |