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<h1 class="title">renderthread.cpp Example File</h1>
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<span class="small-subtitle">threads/queuedcustomtype/renderthread.cpp</span>
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<!-- $$$threads/queuedcustomtype/renderthread.cpp-description -->
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<div class="descr"> <a name="details"></a>
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<pre class="cpp"> <span class="comment">/****************************************************************************
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**
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** Copyright (C) 2015 The Qt Company Ltd.
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** Contact: http://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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** You may use this file under the terms of the BSD license 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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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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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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** from this software without specific prior written permission.
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**
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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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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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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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****************************************************************************/</span>
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<span class="preprocessor">#include "renderthread.h"</span>
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RenderThread<span class="operator">::</span>RenderThread(<span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>parent)
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: <span class="type"><a href="qthread.html">QThread</a></span>(parent)
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{
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m_abort <span class="operator">=</span> <span class="keyword">false</span>;
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}
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RenderThread<span class="operator">::</span><span class="operator">~</span>RenderThread()
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{
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mutex<span class="operator">.</span>lock();
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m_abort <span class="operator">=</span> <span class="keyword">true</span>;
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mutex<span class="operator">.</span>unlock();
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wait();
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}
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<span class="type">void</span> RenderThread<span class="operator">::</span>processImage(<span class="keyword">const</span> <span class="type"><a href="qimage.html">QImage</a></span> <span class="operator">&</span>image)
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{
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<span class="keyword">if</span> (image<span class="operator">.</span>isNull())
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<span class="keyword">return</span>;
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m_image <span class="operator">=</span> image;
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m_abort <span class="operator">=</span> <span class="keyword">false</span>;
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start();
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}
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<span class="type">void</span> RenderThread<span class="operator">::</span>run()
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{
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<span class="type">int</span> size <span class="operator">=</span> <a href="qtglobal.html#qMax">qMax</a>(m_image<span class="operator">.</span>width()<span class="operator">/</span><span class="number">20</span><span class="operator">,</span> m_image<span class="operator">.</span>height()<span class="operator">/</span><span class="number">20</span>);
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<span class="keyword">for</span> (<span class="type">int</span> s <span class="operator">=</span> size; s <span class="operator">></span> <span class="number">0</span>; <span class="operator">-</span><span class="operator">-</span>s) {
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<span class="keyword">for</span> (<span class="type">int</span> c <span class="operator">=</span> <span class="number">0</span>; c <span class="operator"><</span> <span class="number">400</span>; <span class="operator">+</span><span class="operator">+</span>c) {
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<span class="type">int</span> x1 <span class="operator">=</span> <a href="qtglobal.html#qMax">qMax</a>(<span class="number">0</span><span class="operator">,</span> (qrand() <span class="operator">%</span> m_image<span class="operator">.</span>width()) <span class="operator">-</span> s<span class="operator">/</span><span class="number">2</span>);
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<span class="type">int</span> x2 <span class="operator">=</span> <a href="qtglobal.html#qMin">qMin</a>(x1 <span class="operator">+</span> s<span class="operator">/</span><span class="number">2</span> <span class="operator">+</span> <span class="number">1</span><span class="operator">,</span> m_image<span class="operator">.</span>width());
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<span class="type">int</span> y1 <span class="operator">=</span> <a href="qtglobal.html#qMax">qMax</a>(<span class="number">0</span><span class="operator">,</span> (qrand() <span class="operator">%</span> m_image<span class="operator">.</span>height()) <span class="operator">-</span> s<span class="operator">/</span><span class="number">2</span>);
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<span class="type">int</span> y2 <span class="operator">=</span> <a href="qtglobal.html#qMin">qMin</a>(y1 <span class="operator">+</span> s<span class="operator">/</span><span class="number">2</span> <span class="operator">+</span> <span class="number">1</span><span class="operator">,</span> m_image<span class="operator">.</span>height());
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<span class="type">int</span> n <span class="operator">=</span> <span class="number">0</span>;
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<span class="type">int</span> red <span class="operator">=</span> <span class="number">0</span>;
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<span class="type">int</span> green <span class="operator">=</span> <span class="number">0</span>;
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<span class="type">int</span> blue <span class="operator">=</span> <span class="number">0</span>;
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<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> y1; i <span class="operator"><</span> y2; <span class="operator">+</span><span class="operator">+</span>i) {
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<span class="keyword">for</span> (<span class="type">int</span> j <span class="operator">=</span> x1; j <span class="operator"><</span> x2; <span class="operator">+</span><span class="operator">+</span>j) {
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<span class="type"><a href="qcolor.html#QRgb-typedef">QRgb</a></span> pixel <span class="operator">=</span> m_image<span class="operator">.</span>pixel(j<span class="operator">,</span> i);
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red <span class="operator">+</span><span class="operator">=</span> <a href="qcolor.html#qRed">qRed</a>(pixel);
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green <span class="operator">+</span><span class="operator">=</span> <a href="qcolor.html#qGreen">qGreen</a>(pixel);
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blue <span class="operator">+</span><span class="operator">=</span> <a href="qcolor.html#qBlue">qBlue</a>(pixel);
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n <span class="operator">+</span><span class="operator">=</span> <span class="number">1</span>;
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}
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}
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Block block(<span class="type"><a href="qrect.html">QRect</a></span>(x1<span class="operator">,</span> y1<span class="operator">,</span> x2 <span class="operator">-</span> x1 <span class="operator">+</span> <span class="number">1</span><span class="operator">,</span> y2 <span class="operator">-</span> y1 <span class="operator">+</span> <span class="number">1</span>)<span class="operator">,</span>
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<span class="type"><a href="qcolor.html">QColor</a></span>(red<span class="operator">/</span>n<span class="operator">,</span> green<span class="operator">/</span>n<span class="operator">,</span> blue<span class="operator">/</span>n));
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<span class="keyword">emit</span> sendBlock(block);
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<span class="keyword">if</span> (m_abort)
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<span class="keyword">return</span>;
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msleep(<span class="number">10</span>);
|
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}
|
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}
|
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}
|
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|
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<span class="type">void</span> RenderThread<span class="operator">::</span>stopProcess()
|
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{
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mutex<span class="operator">.</span>lock();
|
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m_abort <span class="operator">=</span> <span class="keyword">true</span>;
|
|
mutex<span class="operator">.</span>unlock();
|
|
}</pre>
|
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</div>
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<!-- @@@threads/queuedcustomtype/renderthread.cpp -->
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<acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd.
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Documentation contributions included herein are the copyrights of
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their respective owners.</p>
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The documentation provided herein is licensed under the terms of the
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<a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation
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License version 1.3</a> as published by the Free Software Foundation.</p>
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Documentation sources may be obtained from <a href="http://www.qt-project.org">
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