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<h1 class="title">svgalibpaintengine.cpp Example File</h1>
<span class="small-subtitle">qws/svgalib/svgalibpaintengine.cpp</span>
<!-- $$$qws/svgalib/svgalibpaintengine.cpp-description -->
<div class="descr"> <a name="details"></a>
<pre class="cpp"> <span class="comment">/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** 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 Digia Plc and its Subsidiary(-ies) 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 "svgalibpaintengine.h"</span>
<span class="preprocessor">#include <QColor></span>
<span class="preprocessor">#include <vga.h></span>
<span class="preprocessor">#include <vgagl.h></span>
SvgalibPaintEngine<span class="operator">::</span>SvgalibPaintEngine(<span class="type"><a href="qpaintdevice.html">QPaintDevice</a></span> <span class="operator">*</span>device)
: <span class="type"><a href="qrasterpaintengine.html">QRasterPaintEngine</a></span>(device)
{
}
SvgalibPaintEngine<span class="operator">::</span><span class="operator">~</span>SvgalibPaintEngine()
{
}
<span class="type">bool</span> SvgalibPaintEngine<span class="operator">::</span>begin(<span class="type"><a href="qpaintdevice.html">QPaintDevice</a></span> <span class="operator">*</span>dev)
{
device <span class="operator">=</span> dev;
pen <span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoPen;
simplePen <span class="operator">=</span> <span class="keyword">true</span>;
brush <span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoBrush;
simpleBrush <span class="operator">=</span> <span class="keyword">true</span>;
matrix <span class="operator">=</span> <span class="type"><a href="qtransform.html">QTransform</a></span>();
simpleMatrix <span class="operator">=</span> <span class="keyword">true</span>;
setClip(<span class="type"><a href="qrect.html">QRect</a></span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> device<span class="operator">-</span><span class="operator">></span>width()<span class="operator">,</span> device<span class="operator">-</span><span class="operator">></span>height()));
opaque <span class="operator">=</span> <span class="keyword">true</span>;
aliased <span class="operator">=</span> <span class="keyword">true</span>;
sourceOver <span class="operator">=</span> <span class="keyword">true</span>;
<span class="keyword">return</span> <span class="type"><a href="qrasterpaintengine.html">QRasterPaintEngine</a></span><span class="operator">::</span>begin(dev);
}
<span class="type">bool</span> SvgalibPaintEngine<span class="operator">::</span>end()
{
gl_setclippingwindow(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> device<span class="operator">-</span><span class="operator">></span>width() <span class="operator">-</span> <span class="number">1</span><span class="operator">,</span> device<span class="operator">-</span><span class="operator">></span>height() <span class="operator">-</span> <span class="number">1</span>);
<span class="keyword">return</span> <span class="type"><a href="qrasterpaintengine.html">QRasterPaintEngine</a></span><span class="operator">::</span>end();
}
<span class="type">void</span> SvgalibPaintEngine<span class="operator">::</span>updateState()
{
<span class="type">QRasterPaintEngineState</span> <span class="operator">*</span>s <span class="operator">=</span> state();
<span class="keyword">if</span> (s<span class="operator">-</span><span class="operator">></span>dirty <span class="operator">&</span> DirtyTransform) {
matrix <span class="operator">=</span> s<span class="operator">-</span><span class="operator">></span>matrix;
simpleMatrix <span class="operator">=</span> (matrix<span class="operator">.</span>m12() <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span> <span class="operator">&</span><span class="operator">&</span> matrix<span class="operator">.</span>m21() <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span>);
}
<span class="keyword">if</span> (s<span class="operator">-</span><span class="operator">></span>dirty <span class="operator">&</span> DirtyPen) {
pen <span class="operator">=</span> s<span class="operator">-</span><span class="operator">></span>pen;
simplePen <span class="operator">=</span> (pen<span class="operator">.</span>width() <span class="operator">=</span><span class="operator">=</span> <span class="number">0</span> <span class="operator">|</span><span class="operator">|</span> pen<span class="operator">.</span>widthF() <span class="operator"><</span><span class="operator">=</span> <span class="number">1</span>)
<span class="operator">&</span><span class="operator">&</span> (pen<span class="operator">.</span>style() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoPen <span class="operator">|</span><span class="operator">|</span> pen<span class="operator">.</span>style() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SolidLine)
<span class="operator">&</span><span class="operator">&</span> (pen<span class="operator">.</span>color()<span class="operator">.</span>alpha() <span class="operator">=</span><span class="operator">=</span> <span class="number">255</span>);
}
<span class="keyword">if</span> (s<span class="operator">-</span><span class="operator">></span>dirty <span class="operator">&</span> DirtyBrush) {
brush <span class="operator">=</span> s<span class="operator">-</span><span class="operator">></span>brush;
simpleBrush <span class="operator">=</span> (brush<span class="operator">.</span>style() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SolidPattern
<span class="operator">|</span><span class="operator">|</span> brush<span class="operator">.</span>style() <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoBrush)
<span class="operator">&</span><span class="operator">&</span> (brush<span class="operator">.</span>color()<span class="operator">.</span>alpha() <span class="operator">=</span><span class="operator">=</span> <span class="number">255</span>);
}
<span class="keyword">if</span> (s<span class="operator">-</span><span class="operator">></span>dirty <span class="operator">&</span> DirtyClipRegion)
setClip(s<span class="operator">-</span><span class="operator">></span>clipRegion);
<span class="keyword">if</span> (s<span class="operator">-</span><span class="operator">></span>dirty <span class="operator">&</span> DirtyClipEnabled) {
clipEnabled <span class="operator">=</span> s<span class="operator">-</span><span class="operator">></span>isClipEnabled();
updateClip();
}
<span class="keyword">if</span> (s<span class="operator">-</span><span class="operator">></span>dirty <span class="operator">&</span> DirtyClipPath) {
setClip(<span class="type"><a href="qregion.html">QRegion</a></span>());
simpleClip <span class="operator">=</span> <span class="keyword">false</span>;
}
<span class="keyword">if</span> (s<span class="operator">-</span><span class="operator">></span>dirty <span class="operator">&</span> DirtyCompositionMode) {
<span class="keyword">const</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode m <span class="operator">=</span> s<span class="operator">-</span><span class="operator">></span>composition_mode;
sourceOver <span class="operator">=</span> (m <span class="operator">=</span><span class="operator">=</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_SourceOver);
}
<span class="keyword">if</span> (s<span class="operator">-</span><span class="operator">></span>dirty <span class="operator">&</span> DirtyOpacity)
opaque <span class="operator">=</span> (s<span class="operator">-</span><span class="operator">></span>opacity <span class="operator">=</span><span class="operator">=</span> <span class="number">256</span>);
<span class="keyword">if</span> (s<span class="operator">-</span><span class="operator">></span>dirty <span class="operator">&</span> DirtyHints)
aliased <span class="operator">=</span> <span class="operator">!</span>(s<span class="operator">-</span><span class="operator">></span>flags<span class="operator">.</span>antialiased);
}
<span class="type">void</span> SvgalibPaintEngine<span class="operator">::</span>setClip(<span class="keyword">const</span> <span class="type"><a href="qregion.html">QRegion</a></span> <span class="operator">&</span>region)
{
<span class="keyword">if</span> (region<span class="operator">.</span>isEmpty())
clip <span class="operator">=</span> <span class="type"><a href="qrect.html">QRect</a></span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> device<span class="operator">-</span><span class="operator">></span>width()<span class="operator">,</span> device<span class="operator">-</span><span class="operator">></span>height());
<span class="keyword">else</span>
clip <span class="operator">=</span> matrix<span class="operator">.</span>map(region) <span class="operator">&</span> <span class="type"><a href="qrect.html">QRect</a></span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> device<span class="operator">-</span><span class="operator">></span>width()<span class="operator">,</span> device<span class="operator">-</span><span class="operator">></span>height());
clipEnabled <span class="operator">=</span> <span class="keyword">true</span>;
updateClip();
}
<span class="type">void</span> SvgalibPaintEngine<span class="operator">::</span>updateClip()
{
<span class="type"><a href="qregion.html">QRegion</a></span> clipRegion <span class="operator">=</span> <span class="type"><a href="qrect.html">QRect</a></span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> device<span class="operator">-</span><span class="operator">></span>width()<span class="operator">,</span> device<span class="operator">-</span><span class="operator">></span>height());
<span class="keyword">if</span> (<span class="operator">!</span>systemClip()<span class="operator">.</span>isEmpty())
clipRegion <span class="operator">&</span><span class="operator">=</span> systemClip();
<span class="keyword">if</span> (clipEnabled)
clipRegion <span class="operator">&</span><span class="operator">=</span> clip;
simpleClip <span class="operator">=</span> (clipRegion<span class="operator">.</span>rects()<span class="operator">.</span>size() <span class="operator"><</span><span class="operator">=</span> <span class="number">1</span>);
<span class="keyword">const</span> <span class="type"><a href="qrect.html">QRect</a></span> r <span class="operator">=</span> clipRegion<span class="operator">.</span>boundingRect();
gl_setclippingwindow(r<span class="operator">.</span>left()<span class="operator">,</span> r<span class="operator">.</span>top()<span class="operator">,</span>
r<span class="operator">.</span>x() <span class="operator">+</span> r<span class="operator">.</span>width()<span class="operator">,</span>
r<span class="operator">.</span>y() <span class="operator">+</span> r<span class="operator">.</span>height());
}
<span class="type">void</span> SvgalibPaintEngine<span class="operator">::</span>drawRects(<span class="keyword">const</span> <span class="type"><a href="qrect.html">QRect</a></span> <span class="operator">*</span>rects<span class="operator">,</span> <span class="type">int</span> rectCount)
{
<span class="keyword">const</span> <span class="type">bool</span> canAccelerate <span class="operator">=</span> simplePen <span class="operator">&</span><span class="operator">&</span> simpleBrush <span class="operator">&</span><span class="operator">&</span> simpleMatrix
<span class="operator">&</span><span class="operator">&</span> simpleClip <span class="operator">&</span><span class="operator">&</span> opaque <span class="operator">&</span><span class="operator">&</span> aliased
<span class="operator">&</span><span class="operator">&</span> sourceOver;
<span class="keyword">if</span> (<span class="operator">!</span>canAccelerate) {
<span class="type"><a href="qrasterpaintengine.html">QRasterPaintEngine</a></span><span class="operator">::</span>drawRects(rects<span class="operator">,</span> rectCount);
<span class="keyword">return</span>;
}
<span class="keyword">for</span> (<span class="type">int</span> i <span class="operator">=</span> <span class="number">0</span>; i <span class="operator"><</span> rectCount; <span class="operator">+</span><span class="operator">+</span>i) {
<span class="keyword">const</span> <span class="type"><a href="qrect.html">QRect</a></span> r <span class="operator">=</span> matrix<span class="operator">.</span>mapRect(rects<span class="operator">[</span>i<span class="operator">]</span>);
<span class="keyword">if</span> (brush <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoBrush) {
gl_fillbox(r<span class="operator">.</span>left()<span class="operator">,</span> r<span class="operator">.</span>top()<span class="operator">,</span> r<span class="operator">.</span>width()<span class="operator">,</span> r<span class="operator">.</span>height()<span class="operator">,</span>
brush<span class="operator">.</span>color()<span class="operator">.</span>rgba());
}
<span class="keyword">if</span> (pen <span class="operator">!</span><span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>NoPen) {
<span class="keyword">const</span> <span class="type">int</span> c <span class="operator">=</span> pen<span class="operator">.</span>color()<span class="operator">.</span>rgba();
gl_hline(r<span class="operator">.</span>left()<span class="operator">,</span> r<span class="operator">.</span>top()<span class="operator">,</span> r<span class="operator">.</span>right()<span class="operator">,</span> c);
gl_hline(r<span class="operator">.</span>left()<span class="operator">,</span> r<span class="operator">.</span>bottom()<span class="operator">,</span> r<span class="operator">.</span>right()<span class="operator">,</span> c);
gl_line(r<span class="operator">.</span>left()<span class="operator">,</span> r<span class="operator">.</span>top()<span class="operator">,</span> r<span class="operator">.</span>left()<span class="operator">,</span> r<span class="operator">.</span>bottom()<span class="operator">,</span> c);
gl_line(r<span class="operator">.</span>right()<span class="operator">,</span> r<span class="operator">.</span>top()<span class="operator">,</span> r<span class="operator">.</span>right()<span class="operator">,</span> r<span class="operator">.</span>bottom()<span class="operator">,</span> c);
}
}
}</pre>
</div>
<!-- @@@qws/svgalib/svgalibpaintengine.cpp -->
</div>
</div>
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<acronym title="Copyright">©</acronym> 2013 Digia Plc and/or its
subsidiaries. Documentation contributions included herein are the copyrights of
their respective owners.</p>
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The documentation provided herein is licensed under the terms of the
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License version 1.3</a> as published by the Free Software Foundation.</p>
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