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Breadcrumbs go here --> </ul> </div> <div class="toolbuttons toolblock"> <ul> <li id="smallA" class="t_button">A</li> <li id="medA" class="t_button active">A</li> <li id="bigA" class="t_button">A</li> <li id="print" class="t_button"><a href="javascript:this.print();"> <span>Print</span></a></li> </ul> </div> </div> <div class="content mainContent"> <h1 class="title">renderthread.cpp Example File</h1> <span class="small-subtitle">threads/queuedcustomtype/renderthread.cpp</span> <!-- $$$threads/queuedcustomtype/renderthread.cpp-description --> <div class="descr"> <a name="details"></a> <pre class="cpp"> <span class="comment">/**************************************************************************** ** ** Copyright (C) 2015 The Qt Company Ltd. ** Contact: http://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** 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." ** ** $QT_END_LICENSE$ ** ****************************************************************************/</span> <span class="preprocessor">#include "renderthread.h"</span> RenderThread<span class="operator">::</span>RenderThread(<span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>parent) : <span class="type"><a href="qthread.html">QThread</a></span>(parent) { m_abort <span class="operator">=</span> <span class="keyword">false</span>; } RenderThread<span class="operator">::</span><span class="operator">~</span>RenderThread() { mutex<span class="operator">.</span>lock(); m_abort <span class="operator">=</span> <span class="keyword">true</span>; mutex<span class="operator">.</span>unlock(); wait(); } <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) { <span class="keyword">if</span> (image<span class="operator">.</span>isNull()) <span class="keyword">return</span>; m_image <span class="operator">=</span> image; m_abort <span class="operator">=</span> <span class="keyword">false</span>; start(); } <span class="type">void</span> RenderThread<span class="operator">::</span>run() { <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>); <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) { <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) { <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>); <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()); <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>); <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()); <span class="type">int</span> n <span class="operator">=</span> <span class="number">0</span>; <span class="type">int</span> red <span class="operator">=</span> <span class="number">0</span>; <span class="type">int</span> green <span class="operator">=</span> <span class="number">0</span>; <span class="type">int</span> blue <span class="operator">=</span> <span class="number">0</span>; <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) { <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) { <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); red <span class="operator">+</span><span class="operator">=</span> <a href="qcolor.html#qRed">qRed</a>(pixel); green <span class="operator">+</span><span class="operator">=</span> <a href="qcolor.html#qGreen">qGreen</a>(pixel); blue <span class="operator">+</span><span class="operator">=</span> <a href="qcolor.html#qBlue">qBlue</a>(pixel); n <span class="operator">+</span><span class="operator">=</span> <span class="number">1</span>; } } 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> <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)); <span class="keyword">emit</span> sendBlock(block); <span class="keyword">if</span> (m_abort) <span class="keyword">return</span>; msleep(<span class="number">10</span>); } } } <span class="type">void</span> RenderThread<span class="operator">::</span>stopProcess() { mutex<span class="operator">.</span>lock(); m_abort <span class="operator">=</span> <span class="keyword">true</span>; mutex<span class="operator">.</span>unlock(); }</pre> </div> <!-- @@@threads/queuedcustomtype/renderthread.cpp --> </div> </div> </div> <div class="ft"> <span></span> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2015 The Qt Company Ltd. 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