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<h1 class="title">context2d.cpp Example File</h1>
<span class="small-subtitle">script/context2d/context2d.cpp</span>
<!-- $$$script/context2d/context2d.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 "context2d.h"</span>
<span class="preprocessor">#include <QVariant></span>
<span class="preprocessor">#include <math.h></span>
<span class="keyword">static</span> <span class="keyword">const</span> <span class="type">double</span> Q_PI <span class="operator">=</span> <span class="number">3.14159265358979323846</span>; <span class="comment">// pi</span>
<span class="preprocessor">#define DEGREES(t) ((t) * 180.0 / Q_PI)</span>
<span class="preprocessor">#define qClamp(val, min, max) qMin(qMax(val, min), max)</span>
<span class="keyword">static</span> <span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span><span class="operator">></span> parseNumbersList(<span class="type"><a href="qstring.html">QString</a></span><span class="operator">::</span>const_iterator <span class="operator">&</span>itr)
{
<span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span><span class="operator">></span> points;
<span class="type"><a href="qstring.html">QString</a></span> temp;
<span class="keyword">while</span> ((<span class="operator">*</span>itr)<span class="operator">.</span>isSpace())
<span class="operator">+</span><span class="operator">+</span>itr;
<span class="keyword">while</span> ((<span class="operator">*</span>itr)<span class="operator">.</span>isNumber() <span class="operator">|</span><span class="operator">|</span>
(<span class="operator">*</span>itr) <span class="operator">=</span><span class="operator">=</span> <span class="char">'-'</span> <span class="operator">|</span><span class="operator">|</span> (<span class="operator">*</span>itr) <span class="operator">=</span><span class="operator">=</span> <span class="char">'+'</span> <span class="operator">|</span><span class="operator">|</span> (<span class="operator">*</span>itr) <span class="operator">=</span><span class="operator">=</span> <span class="char">'.'</span>) {
temp <span class="operator">=</span> <span class="type"><a href="qstring.html">QString</a></span>();
<span class="keyword">if</span> ((<span class="operator">*</span>itr) <span class="operator">=</span><span class="operator">=</span> <span class="char">'-'</span>)
temp <span class="operator">+</span><span class="operator">=</span> <span class="operator">*</span>itr<span class="operator">+</span><span class="operator">+</span>;
<span class="keyword">else</span> <span class="keyword">if</span> ((<span class="operator">*</span>itr) <span class="operator">=</span><span class="operator">=</span> <span class="char">'+'</span>)
temp <span class="operator">+</span><span class="operator">=</span> <span class="operator">*</span>itr<span class="operator">+</span><span class="operator">+</span>;
<span class="keyword">while</span> ((<span class="operator">*</span>itr)<span class="operator">.</span>isDigit())
temp <span class="operator">+</span><span class="operator">=</span> <span class="operator">*</span>itr<span class="operator">+</span><span class="operator">+</span>;
<span class="keyword">if</span> ((<span class="operator">*</span>itr) <span class="operator">=</span><span class="operator">=</span> <span class="char">'.'</span>)
temp <span class="operator">+</span><span class="operator">=</span> <span class="operator">*</span>itr<span class="operator">+</span><span class="operator">+</span>;
<span class="keyword">while</span> ((<span class="operator">*</span>itr)<span class="operator">.</span>isDigit())
temp <span class="operator">+</span><span class="operator">=</span> <span class="operator">*</span>itr<span class="operator">+</span><span class="operator">+</span>;
<span class="keyword">while</span> ((<span class="operator">*</span>itr)<span class="operator">.</span>isSpace())
<span class="operator">+</span><span class="operator">+</span>itr;
<span class="keyword">if</span> ((<span class="operator">*</span>itr) <span class="operator">=</span><span class="operator">=</span> <span class="char">','</span>)
<span class="operator">+</span><span class="operator">+</span>itr;
points<span class="operator">.</span>append(temp<span class="operator">.</span>toDouble());
<span class="comment">//eat spaces</span>
<span class="keyword">while</span> ((<span class="operator">*</span>itr)<span class="operator">.</span>isSpace())
<span class="operator">+</span><span class="operator">+</span>itr;
}
<span class="keyword">return</span> points;
}
<span class="type"><a href="qcolor.html">QColor</a></span> colorFromString(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>name)
{
<span class="type"><a href="qstring.html">QString</a></span><span class="operator">::</span>const_iterator itr <span class="operator">=</span> name<span class="operator">.</span>constBegin();
<span class="type"><a href="qlist.html">QList</a></span><span class="operator"><</span><span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span><span class="operator">></span> compo;
<span class="keyword">if</span> (name<span class="operator">.</span>startsWith(<span class="string">"rgba("</span>)) {
<span class="operator">+</span><span class="operator">+</span>itr; <span class="operator">+</span><span class="operator">+</span>itr; <span class="operator">+</span><span class="operator">+</span>itr; <span class="operator">+</span><span class="operator">+</span>itr; <span class="operator">+</span><span class="operator">+</span>itr;
compo <span class="operator">=</span> parseNumbersList(itr);
<span class="keyword">if</span> (compo<span class="operator">.</span>size() <span class="operator">!</span><span class="operator">=</span> <span class="number">4</span>) {
<span class="keyword">return</span> <span class="type"><a href="qcolor.html">QColor</a></span>();
}
<span class="comment">//alpha seems to be always between 0-1</span>
compo<span class="operator">[</span><span class="number">3</span><span class="operator">]</span> <span class="operator">*</span><span class="operator">=</span> <span class="number">255</span>;
<span class="keyword">return</span> <span class="type"><a href="qcolor.html">QColor</a></span>((<span class="type">int</span>)compo<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">,</span> (<span class="type">int</span>)compo<span class="operator">[</span><span class="number">1</span><span class="operator">]</span><span class="operator">,</span>
(<span class="type">int</span>)compo<span class="operator">[</span><span class="number">2</span><span class="operator">]</span><span class="operator">,</span> (<span class="type">int</span>)compo<span class="operator">[</span><span class="number">3</span><span class="operator">]</span>);
} <span class="keyword">else</span> <span class="keyword">if</span> (name<span class="operator">.</span>startsWith(<span class="string">"rgb("</span>)) {
<span class="operator">+</span><span class="operator">+</span>itr; <span class="operator">+</span><span class="operator">+</span>itr; <span class="operator">+</span><span class="operator">+</span>itr; <span class="operator">+</span><span class="operator">+</span>itr;
compo <span class="operator">=</span> parseNumbersList(itr);
<span class="keyword">if</span> (compo<span class="operator">.</span>size() <span class="operator">!</span><span class="operator">=</span> <span class="number">3</span>) {
<span class="keyword">return</span> <span class="type"><a href="qcolor.html">QColor</a></span>();
}
<span class="keyword">return</span> <span class="type"><a href="qcolor.html">QColor</a></span>((<span class="type">int</span>)qClamp(compo<span class="operator">[</span><span class="number">0</span><span class="operator">]</span><span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">0</span>)<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">255</span>))<span class="operator">,</span>
(<span class="type">int</span>)qClamp(compo<span class="operator">[</span><span class="number">1</span><span class="operator">]</span><span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">0</span>)<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">255</span>))<span class="operator">,</span>
(<span class="type">int</span>)qClamp(compo<span class="operator">[</span><span class="number">2</span><span class="operator">]</span><span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">0</span>)<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span>(<span class="number">255</span>)));
} <span class="keyword">else</span> {
<span class="comment">//QRgb color;</span>
<span class="comment">//CSSParser::parseColor(name, color);</span>
<span class="keyword">return</span> <span class="type"><a href="qcolor.html">QColor</a></span>(name);
}
}
<span class="keyword">static</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode compositeOperatorFromString(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>compositeOperator)
{
<span class="keyword">if</span> ( compositeOperator <span class="operator">=</span><span class="operator">=</span> <span class="string">"source-over"</span> ) {
<span class="keyword">return</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_SourceOver;
} <span class="keyword">else</span> <span class="keyword">if</span> ( compositeOperator <span class="operator">=</span><span class="operator">=</span> <span class="string">"source-out"</span> ) {
<span class="keyword">return</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_SourceOut;
} <span class="keyword">else</span> <span class="keyword">if</span> ( compositeOperator <span class="operator">=</span><span class="operator">=</span> <span class="string">"source-in"</span> ) {
<span class="keyword">return</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_SourceIn;
} <span class="keyword">else</span> <span class="keyword">if</span> ( compositeOperator <span class="operator">=</span><span class="operator">=</span> <span class="string">"source-atop"</span> ) {
<span class="keyword">return</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_SourceAtop;
} <span class="keyword">else</span> <span class="keyword">if</span> ( compositeOperator <span class="operator">=</span><span class="operator">=</span> <span class="string">"destination-atop"</span> ) {
<span class="keyword">return</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_DestinationAtop;
} <span class="keyword">else</span> <span class="keyword">if</span> ( compositeOperator <span class="operator">=</span><span class="operator">=</span> <span class="string">"destination-in"</span> ) {
<span class="keyword">return</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_DestinationIn;
} <span class="keyword">else</span> <span class="keyword">if</span> ( compositeOperator <span class="operator">=</span><span class="operator">=</span> <span class="string">"destination-out"</span> ) {
<span class="keyword">return</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_DestinationOut;
} <span class="keyword">else</span> <span class="keyword">if</span> ( compositeOperator <span class="operator">=</span><span class="operator">=</span> <span class="string">"destination-over"</span> ) {
<span class="keyword">return</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_DestinationOver;
} <span class="keyword">else</span> <span class="keyword">if</span> ( compositeOperator <span class="operator">=</span><span class="operator">=</span> <span class="string">"darker"</span> ) {
<span class="keyword">return</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_SourceOver;
} <span class="keyword">else</span> <span class="keyword">if</span> ( compositeOperator <span class="operator">=</span><span class="operator">=</span> <span class="string">"lighter"</span> ) {
<span class="keyword">return</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_SourceOver;
} <span class="keyword">else</span> <span class="keyword">if</span> ( compositeOperator <span class="operator">=</span><span class="operator">=</span> <span class="string">"copy"</span> ) {
<span class="keyword">return</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Source;
} <span class="keyword">else</span> <span class="keyword">if</span> ( compositeOperator <span class="operator">=</span><span class="operator">=</span> <span class="string">"xor"</span> ) {
<span class="keyword">return</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Xor;
}
<span class="keyword">return</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_SourceOver;
}
<span class="keyword">static</span> <span class="type"><a href="qstring.html">QString</a></span> compositeOperatorToString(<span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode op)
{
<span class="keyword">switch</span> (op) {
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_SourceOver:
<span class="keyword">return</span> <span class="string">"source-over"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_DestinationOver:
<span class="keyword">return</span> <span class="string">"destination-over"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Clear:
<span class="keyword">return</span> <span class="string">"clear"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Source:
<span class="keyword">return</span> <span class="string">"source"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Destination:
<span class="keyword">return</span> <span class="string">"destination"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_SourceIn:
<span class="keyword">return</span> <span class="string">"source-in"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_DestinationIn:
<span class="keyword">return</span> <span class="string">"destination-in"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_SourceOut:
<span class="keyword">return</span> <span class="string">"source-out"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_DestinationOut:
<span class="keyword">return</span> <span class="string">"destination-out"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_SourceAtop:
<span class="keyword">return</span> <span class="string">"source-atop"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_DestinationAtop:
<span class="keyword">return</span> <span class="string">"destination-atop"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Xor:
<span class="keyword">return</span> <span class="string">"xor"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Plus:
<span class="keyword">return</span> <span class="string">"plus"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Multiply:
<span class="keyword">return</span> <span class="string">"multiply"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Screen:
<span class="keyword">return</span> <span class="string">"screen"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Overlay:
<span class="keyword">return</span> <span class="string">"overlay"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Darken:
<span class="keyword">return</span> <span class="string">"darken"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Lighten:
<span class="keyword">return</span> <span class="string">"lighten"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_ColorDodge:
<span class="keyword">return</span> <span class="string">"color-dodge"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_ColorBurn:
<span class="keyword">return</span> <span class="string">"color-burn"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_HardLight:
<span class="keyword">return</span> <span class="string">"hard-light"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_SoftLight:
<span class="keyword">return</span> <span class="string">"soft-light"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Difference:
<span class="keyword">return</span> <span class="string">"difference"</span>;
<span class="keyword">case</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Exclusion:
<span class="keyword">return</span> <span class="string">"exclusion"</span>;
<span class="keyword">default</span>:
<span class="keyword">break</span>;
}
<span class="keyword">return</span> <span class="type"><a href="qstring.html">QString</a></span>();
}
<span class="type">void</span> Context2D<span class="operator">::</span>save()
{
m_stateStack<span class="operator">.</span>push(m_state);
}
<span class="type">void</span> Context2D<span class="operator">::</span>restore()
{
<span class="keyword">if</span> (<span class="operator">!</span>m_stateStack<span class="operator">.</span>isEmpty()) {
m_state <span class="operator">=</span> m_stateStack<span class="operator">.</span>pop();
m_state<span class="operator">.</span>flags <span class="operator">=</span> AllIsFullOfDirt;
}
}
<span class="type">void</span> Context2D<span class="operator">::</span>scale(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y)
{
m_state<span class="operator">.</span>matrix<span class="operator">.</span>scale(x<span class="operator">,</span> y);
m_state<span class="operator">.</span>flags <span class="operator">|</span><span class="operator">=</span> DirtyTransformationMatrix;
}
<span class="type">void</span> Context2D<span class="operator">::</span>rotate(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> angle)
{
m_state<span class="operator">.</span>matrix<span class="operator">.</span>rotate(DEGREES(angle));
m_state<span class="operator">.</span>flags <span class="operator">|</span><span class="operator">=</span> DirtyTransformationMatrix;
}
<span class="type">void</span> Context2D<span class="operator">::</span>translate(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y)
{
m_state<span class="operator">.</span>matrix<span class="operator">.</span>translate(x<span class="operator">,</span> y);
m_state<span class="operator">.</span>flags <span class="operator">|</span><span class="operator">=</span> DirtyTransformationMatrix;
}
<span class="type">void</span> Context2D<span class="operator">::</span>transform(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> m11<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> m12<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> m21<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> m22<span class="operator">,</span>
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dx<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dy)
{
<span class="type"><a href="qmatrix.html">QMatrix</a></span> mat(m11<span class="operator">,</span> m12<span class="operator">,</span>
m21<span class="operator">,</span> m22<span class="operator">,</span>
dx<span class="operator">,</span> dy);
m_state<span class="operator">.</span>matrix <span class="operator">*</span><span class="operator">=</span> mat;
m_state<span class="operator">.</span>flags <span class="operator">|</span><span class="operator">=</span> DirtyTransformationMatrix;
}
<span class="type">void</span> Context2D<span class="operator">::</span>setTransform(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> m11<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> m12<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> m21<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> m22<span class="operator">,</span>
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dx<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dy)
{
<span class="type"><a href="qmatrix.html">QMatrix</a></span> mat(m11<span class="operator">,</span> m12<span class="operator">,</span>
m21<span class="operator">,</span> m22<span class="operator">,</span>
dx<span class="operator">,</span> dy);
m_state<span class="operator">.</span>matrix <span class="operator">=</span> mat;
m_state<span class="operator">.</span>flags <span class="operator">|</span><span class="operator">=</span> DirtyTransformationMatrix;
}
<span class="type"><a href="qstring.html">QString</a></span> Context2D<span class="operator">::</span>globalCompositeOperation() <span class="keyword">const</span>
{
<span class="keyword">return</span> compositeOperatorToString(m_state<span class="operator">.</span>globalCompositeOperation);
}
<span class="type">void</span> Context2D<span class="operator">::</span>setGlobalCompositeOperation(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>op)
{
<span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode mode <span class="operator">=</span>
compositeOperatorFromString(op);
m_state<span class="operator">.</span>globalCompositeOperation <span class="operator">=</span> mode;
m_state<span class="operator">.</span>flags <span class="operator">|</span><span class="operator">=</span> DirtyGlobalCompositeOperation;
}
<span class="type"><a href="qvariant.html">QVariant</a></span> Context2D<span class="operator">::</span>strokeStyle() <span class="keyword">const</span>
{
<span class="keyword">return</span> m_state<span class="operator">.</span>strokeStyle;
}
<span class="type">void</span> Context2D<span class="operator">::</span>setStrokeStyle(<span class="keyword">const</span> <span class="type"><a href="qvariant.html">QVariant</a></span> <span class="operator">&</span>style)
{
<span class="keyword">if</span> (style<span class="operator">.</span>canConvert<span class="operator"><</span>CanvasGradient<span class="operator">></span>()) {
CanvasGradient cg <span class="operator">=</span> qvariant_cast<span class="operator"><</span>CanvasGradient<span class="operator">></span>(style);
m_state<span class="operator">.</span>strokeStyle <span class="operator">=</span> cg<span class="operator">.</span>value;
} <span class="keyword">else</span> {
<span class="type"><a href="qcolor.html">QColor</a></span> color <span class="operator">=</span> colorFromString(style<span class="operator">.</span>toString());
m_state<span class="operator">.</span>strokeStyle <span class="operator">=</span> color;
}
m_state<span class="operator">.</span>flags <span class="operator">|</span><span class="operator">=</span> DirtyStrokeStyle;
}
<span class="type"><a href="qvariant.html">QVariant</a></span> Context2D<span class="operator">::</span>fillStyle() <span class="keyword">const</span>
{
<span class="keyword">return</span> m_state<span class="operator">.</span>fillStyle;
}
<span class="type">void</span> Context2D<span class="operator">::</span>setFillStyle(<span class="keyword">const</span> <span class="type"><a href="qvariant.html">QVariant</a></span> <span class="operator">&</span>style)
{
<span class="keyword">if</span> (style<span class="operator">.</span>canConvert<span class="operator"><</span>CanvasGradient<span class="operator">></span>()) {
CanvasGradient cg <span class="operator">=</span> qvariant_cast<span class="operator"><</span>CanvasGradient<span class="operator">></span>(style);
m_state<span class="operator">.</span>fillStyle <span class="operator">=</span> cg<span class="operator">.</span>value;
} <span class="keyword">else</span> {
<span class="type"><a href="qcolor.html">QColor</a></span> color <span class="operator">=</span> colorFromString(style<span class="operator">.</span>toString());
m_state<span class="operator">.</span>fillStyle <span class="operator">=</span> color;
}
m_state<span class="operator">.</span>flags <span class="operator">|</span><span class="operator">=</span> DirtyFillStyle;
}
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> Context2D<span class="operator">::</span>globalAlpha() <span class="keyword">const</span>
{
<span class="keyword">return</span> m_state<span class="operator">.</span>globalAlpha;
}
<span class="type">void</span> Context2D<span class="operator">::</span>setGlobalAlpha(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> alpha)
{
m_state<span class="operator">.</span>globalAlpha <span class="operator">=</span> alpha;
m_state<span class="operator">.</span>flags <span class="operator">|</span><span class="operator">=</span> DirtyGlobalAlpha;
}
CanvasGradient Context2D<span class="operator">::</span>createLinearGradient(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x0<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y0<span class="operator">,</span>
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x1<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y1)
{
<span class="type"><a href="qlineargradient.html">QLinearGradient</a></span> g(x0<span class="operator">,</span> y0<span class="operator">,</span> x1<span class="operator">,</span> y1);
<span class="keyword">return</span> CanvasGradient(g);
}
CanvasGradient Context2D<span class="operator">::</span>createRadialGradient(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x0<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y0<span class="operator">,</span>
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> r0<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x1<span class="operator">,</span>
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y1<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> r1)
{
<span class="type"><a href="qradialgradient.html">QRadialGradient</a></span> g(<span class="type"><a href="qpointf.html">QPointF</a></span>(x1<span class="operator">,</span> y1)<span class="operator">,</span> r0<span class="operator">+</span>r1<span class="operator">,</span> <span class="type"><a href="qpointf.html">QPointF</a></span>(x0<span class="operator">,</span> y0));
<span class="keyword">return</span> CanvasGradient(g);
}
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> Context2D<span class="operator">::</span>lineWidth() <span class="keyword">const</span>
{
<span class="keyword">return</span> m_state<span class="operator">.</span>lineWidth;
}
<span class="type">void</span> Context2D<span class="operator">::</span>setLineWidth(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> w)
{
m_state<span class="operator">.</span>lineWidth <span class="operator">=</span> w;
m_state<span class="operator">.</span>flags <span class="operator">|</span><span class="operator">=</span> DirtyLineWidth;
}
<span class="type"><a href="qstring.html">QString</a></span> Context2D<span class="operator">::</span>lineCap() <span class="keyword">const</span>
{
<span class="keyword">switch</span> (m_state<span class="operator">.</span>lineCap) {
<span class="keyword">case</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>FlatCap:
<span class="keyword">return</span> <span class="string">"butt"</span>;
<span class="keyword">case</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SquareCap:
<span class="keyword">return</span> <span class="string">"square"</span>;
<span class="keyword">case</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>RoundCap:
<span class="keyword">return</span> <span class="string">"round"</span>;
<span class="keyword">default</span>: ;
}
<span class="keyword">return</span> <span class="type"><a href="qstring.html">QString</a></span>();
}
<span class="type">void</span> Context2D<span class="operator">::</span>setLineCap(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>capString)
{
<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>PenCapStyle style;
<span class="keyword">if</span> (capString <span class="operator">=</span><span class="operator">=</span> <span class="string">"round"</span>)
style <span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>RoundCap;
<span class="keyword">else</span> <span class="keyword">if</span> (capString <span class="operator">=</span><span class="operator">=</span> <span class="string">"square"</span>)
style <span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SquareCap;
<span class="keyword">else</span> <span class="comment">//if (capString == "butt")</span>
style <span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>FlatCap;
m_state<span class="operator">.</span>lineCap <span class="operator">=</span> style;
m_state<span class="operator">.</span>flags <span class="operator">|</span><span class="operator">=</span> DirtyLineCap;
}
<span class="type"><a href="qstring.html">QString</a></span> Context2D<span class="operator">::</span>lineJoin() <span class="keyword">const</span>
{
<span class="keyword">switch</span> (m_state<span class="operator">.</span>lineJoin) {
<span class="keyword">case</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>RoundJoin:
<span class="keyword">return</span> <span class="string">"round"</span>;
<span class="keyword">case</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>BevelJoin:
<span class="keyword">return</span> <span class="string">"bevel"</span>;
<span class="keyword">case</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>MiterJoin:
<span class="keyword">return</span> <span class="string">"miter"</span>;
<span class="keyword">default</span>: ;
}
<span class="keyword">return</span> <span class="type"><a href="qstring.html">QString</a></span>();
}
<span class="type">void</span> Context2D<span class="operator">::</span>setLineJoin(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>joinString)
{
<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>PenJoinStyle style;
<span class="keyword">if</span> (joinString <span class="operator">=</span><span class="operator">=</span> <span class="string">"round"</span>)
style <span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>RoundJoin;
<span class="keyword">else</span> <span class="keyword">if</span> (joinString <span class="operator">=</span><span class="operator">=</span> <span class="string">"bevel"</span>)
style <span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>BevelJoin;
<span class="keyword">else</span> <span class="comment">//if (joinString == "miter")</span>
style <span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>MiterJoin;
m_state<span class="operator">.</span>lineJoin <span class="operator">=</span> style;
m_state<span class="operator">.</span>flags <span class="operator">|</span><span class="operator">=</span> DirtyLineJoin;
}
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> Context2D<span class="operator">::</span>miterLimit() <span class="keyword">const</span>
{
<span class="keyword">return</span> m_state<span class="operator">.</span>miterLimit;
}
<span class="type">void</span> Context2D<span class="operator">::</span>setMiterLimit(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> m)
{
m_state<span class="operator">.</span>miterLimit <span class="operator">=</span> m;
m_state<span class="operator">.</span>flags <span class="operator">|</span><span class="operator">=</span> DirtyMiterLimit;
}
<span class="type">void</span> Context2D<span class="operator">::</span>setShadowOffsetX(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x)
{
m_state<span class="operator">.</span>shadowOffsetX <span class="operator">=</span> x;
m_state<span class="operator">.</span>flags <span class="operator">|</span><span class="operator">=</span> DirtyShadowOffsetX;
}
<span class="type">void</span> Context2D<span class="operator">::</span>setShadowOffsetY(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y)
{
m_state<span class="operator">.</span>shadowOffsetY <span class="operator">=</span> y;
m_state<span class="operator">.</span>flags <span class="operator">|</span><span class="operator">=</span> DirtyShadowOffsetY;
}
<span class="type">void</span> Context2D<span class="operator">::</span>setShadowBlur(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> b)
{
m_state<span class="operator">.</span>shadowBlur <span class="operator">=</span> b;
m_state<span class="operator">.</span>flags <span class="operator">|</span><span class="operator">=</span> DirtyShadowBlur;
}
<span class="type">void</span> Context2D<span class="operator">::</span>setShadowColor(<span class="keyword">const</span> <span class="type"><a href="qstring.html">QString</a></span> <span class="operator">&</span>str)
{
m_state<span class="operator">.</span>shadowColor <span class="operator">=</span> colorFromString(str);
m_state<span class="operator">.</span>flags <span class="operator">|</span><span class="operator">=</span> DirtyShadowColor;
}
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> Context2D<span class="operator">::</span>shadowOffsetX() <span class="keyword">const</span>
{
<span class="keyword">return</span> m_state<span class="operator">.</span>shadowOffsetX;
}
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> Context2D<span class="operator">::</span>shadowOffsetY() <span class="keyword">const</span>
{
<span class="keyword">return</span> m_state<span class="operator">.</span>shadowOffsetY;
}
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> Context2D<span class="operator">::</span>shadowBlur() <span class="keyword">const</span>
{
<span class="keyword">return</span> m_state<span class="operator">.</span>shadowBlur;
}
<span class="type"><a href="qstring.html">QString</a></span> Context2D<span class="operator">::</span>shadowColor() <span class="keyword">const</span>
{
<span class="keyword">return</span> m_state<span class="operator">.</span>shadowColor<span class="operator">.</span>name();
}
<span class="type">void</span> Context2D<span class="operator">::</span>clearRect(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> w<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> h)
{
beginPainting();
m_painter<span class="operator">.</span>save();
m_painter<span class="operator">.</span>setMatrix(m_state<span class="operator">.</span>matrix<span class="operator">,</span> <span class="keyword">false</span>);
m_painter<span class="operator">.</span>setCompositionMode(<span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_Source);
m_painter<span class="operator">.</span>fillRect(<span class="type"><a href="qrectf.html">QRectF</a></span>(x<span class="operator">,</span> y<span class="operator">,</span> w<span class="operator">,</span> h)<span class="operator">,</span> <span class="type"><a href="qcolor.html">QColor</a></span>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>));
m_painter<span class="operator">.</span>restore();
scheduleChange();
}
<span class="type">void</span> Context2D<span class="operator">::</span>fillRect(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> w<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> h)
{
beginPainting();
m_painter<span class="operator">.</span>save();
m_painter<span class="operator">.</span>setMatrix(m_state<span class="operator">.</span>matrix<span class="operator">,</span> <span class="keyword">false</span>);
m_painter<span class="operator">.</span>fillRect(<span class="type"><a href="qrectf.html">QRectF</a></span>(x<span class="operator">,</span> y<span class="operator">,</span> w<span class="operator">,</span> h)<span class="operator">,</span> m_painter<span class="operator">.</span>brush());
m_painter<span class="operator">.</span>restore();
scheduleChange();
}
<span class="type">void</span> Context2D<span class="operator">::</span>strokeRect(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> w<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> h)
{
<span class="type"><a href="qpainterpath.html">QPainterPath</a></span> path;
path<span class="operator">.</span>addRect(x<span class="operator">,</span> y<span class="operator">,</span> w<span class="operator">,</span> h);
beginPainting();
m_painter<span class="operator">.</span>save();
m_painter<span class="operator">.</span>setMatrix(m_state<span class="operator">.</span>matrix<span class="operator">,</span> <span class="keyword">false</span>);
m_painter<span class="operator">.</span>strokePath(path<span class="operator">,</span> m_painter<span class="operator">.</span>pen());
m_painter<span class="operator">.</span>restore();
scheduleChange();
}
<span class="type">void</span> Context2D<span class="operator">::</span>beginPath()
{
m_path <span class="operator">=</span> <span class="type"><a href="qpainterpath.html">QPainterPath</a></span>();
}
<span class="type">void</span> Context2D<span class="operator">::</span>closePath()
{
m_path<span class="operator">.</span>closeSubpath();
}
<span class="type">void</span> Context2D<span class="operator">::</span>moveTo(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y)
{
<span class="type"><a href="qpointf.html">QPointF</a></span> pt <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>map(<span class="type"><a href="qpointf.html">QPointF</a></span>(x<span class="operator">,</span> y));
m_path<span class="operator">.</span>moveTo(pt);
}
<span class="type">void</span> Context2D<span class="operator">::</span>lineTo(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y)
{
<span class="type"><a href="qpointf.html">QPointF</a></span> pt <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>map(<span class="type"><a href="qpointf.html">QPointF</a></span>(x<span class="operator">,</span> y));
m_path<span class="operator">.</span>lineTo(pt);
}
<span class="type">void</span> Context2D<span class="operator">::</span>quadraticCurveTo(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> cpx<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> cpy<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y)
{
<span class="type"><a href="qpointf.html">QPointF</a></span> cp <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>map(<span class="type"><a href="qpointf.html">QPointF</a></span>(cpx<span class="operator">,</span> cpy));
<span class="type"><a href="qpointf.html">QPointF</a></span> xy <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>map(<span class="type"><a href="qpointf.html">QPointF</a></span>(x<span class="operator">,</span> y));
m_path<span class="operator">.</span>quadTo(cp<span class="operator">,</span> xy);
}
<span class="type">void</span> Context2D<span class="operator">::</span>bezierCurveTo(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> cp1x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> cp1y<span class="operator">,</span>
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> cp2x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> cp2y<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y)
{
<span class="type"><a href="qpointf.html">QPointF</a></span> cp1 <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>map(<span class="type"><a href="qpointf.html">QPointF</a></span>(cp1x<span class="operator">,</span> cp1y));
<span class="type"><a href="qpointf.html">QPointF</a></span> cp2 <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>map(<span class="type"><a href="qpointf.html">QPointF</a></span>(cp2x<span class="operator">,</span> cp2y));
<span class="type"><a href="qpointf.html">QPointF</a></span> end <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>map(<span class="type"><a href="qpointf.html">QPointF</a></span>(x<span class="operator">,</span> y));
m_path<span class="operator">.</span>cubicTo(cp1<span class="operator">,</span> cp2<span class="operator">,</span> end);
}
<span class="type">void</span> Context2D<span class="operator">::</span>arcTo(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x1<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y1<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x2<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y2<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> radius)
{
<span class="comment">//FIXME: this is surely busted</span>
<span class="type"><a href="qpointf.html">QPointF</a></span> st <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>map(<span class="type"><a href="qpointf.html">QPointF</a></span>(x1<span class="operator">,</span> y1));
<span class="type"><a href="qpointf.html">QPointF</a></span> end <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>map(<span class="type"><a href="qpointf.html">QPointF</a></span>(x2<span class="operator">,</span> y2));
m_path<span class="operator">.</span>arcTo(st<span class="operator">.</span>x()<span class="operator">,</span> st<span class="operator">.</span>y()<span class="operator">,</span>
end<span class="operator">.</span>x()<span class="operator">-</span>st<span class="operator">.</span>x()<span class="operator">,</span> end<span class="operator">.</span>y()<span class="operator">-</span>st<span class="operator">.</span>y()<span class="operator">,</span>
radius<span class="operator">,</span> <span class="number">90</span>);
}
<span class="type">void</span> Context2D<span class="operator">::</span>rect(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> w<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> h)
{
<span class="type"><a href="qpainterpath.html">QPainterPath</a></span> path; path<span class="operator">.</span>addRect(x<span class="operator">,</span> y<span class="operator">,</span> w<span class="operator">,</span> h);
path <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>map(path);
m_path<span class="operator">.</span>addPath(path);
}
<span class="type">void</span> Context2D<span class="operator">::</span>arc(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> xc<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> yc<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> radius<span class="operator">,</span>
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sar<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> ear<span class="operator">,</span>
<span class="type">bool</span> anticlockwise)
{
<span class="comment">//### HACK</span>
<span class="comment">// In Qt we don't switch the coordinate system for degrees</span>
<span class="comment">// and still use the 0,0 as bottom left for degrees so we need</span>
<span class="comment">// to switch</span>
sar <span class="operator">=</span> <span class="operator">-</span>sar;
ear <span class="operator">=</span> <span class="operator">-</span>ear;
anticlockwise <span class="operator">=</span> <span class="operator">!</span>anticlockwise;
<span class="comment">//end hack</span>
<span class="type">float</span> sa <span class="operator">=</span> DEGREES(sar);
<span class="type">float</span> ea <span class="operator">=</span> DEGREES(ear);
<span class="type">double</span> span <span class="operator">=</span> <span class="number">0</span>;
<span class="type">double</span> xs <span class="operator">=</span> xc <span class="operator">-</span> radius;
<span class="type">double</span> ys <span class="operator">=</span> yc <span class="operator">-</span> radius;
<span class="type">double</span> width <span class="operator">=</span> radius<span class="operator">*</span><span class="number">2</span>;
<span class="type">double</span> height <span class="operator">=</span> radius<span class="operator">*</span><span class="number">2</span>;
<span class="keyword">if</span> (<span class="operator">!</span>anticlockwise <span class="operator">&</span><span class="operator">&</span> (ea <span class="operator"><</span> sa)) {
span <span class="operator">+</span><span class="operator">=</span> <span class="number">360</span>;
} <span class="keyword">else</span> <span class="keyword">if</span> (anticlockwise <span class="operator">&</span><span class="operator">&</span> (sa <span class="operator"><</span> ea)) {
span <span class="operator">-</span><span class="operator">=</span> <span class="number">360</span>;
}
<span class="comment">//### this is also due to switched coordinate system</span>
<span class="comment">// we would end up with a 0 span instead of 360</span>
<span class="keyword">if</span> (<span class="operator">!</span>(<a href="qvector3d.html#qFuzzyCompare">qFuzzyCompare</a>(span <span class="operator">+</span> (ea <span class="operator">-</span> sa) <span class="operator">+</span> <span class="number">1</span><span class="operator">,</span> <span class="number">1</span>) <span class="operator">&</span><span class="operator">&</span>
<a href="qvector3d.html#qFuzzyCompare">qFuzzyCompare</a>(<a href="qtglobal.html#qAbs">qAbs</a>(span)<span class="operator">,</span> <span class="number">360</span>))) {
span <span class="operator">+</span><span class="operator">=</span> ea <span class="operator">-</span> sa;
}
<span class="type"><a href="qpainterpath.html">QPainterPath</a></span> path;
path<span class="operator">.</span>moveTo(<span class="type"><a href="qpointf.html">QPointF</a></span>(xc <span class="operator">+</span> radius <span class="operator">*</span> cos(sar)<span class="operator">,</span>
yc <span class="operator">-</span> radius <span class="operator">*</span> sin(sar)));
path<span class="operator">.</span>arcTo(xs<span class="operator">,</span> ys<span class="operator">,</span> width<span class="operator">,</span> height<span class="operator">,</span> sa<span class="operator">,</span> span);
path <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>map(path);
m_path<span class="operator">.</span>addPath(path);
}
<span class="type">void</span> Context2D<span class="operator">::</span>fill()
{
beginPainting();
m_painter<span class="operator">.</span>fillPath(m_path<span class="operator">,</span> m_painter<span class="operator">.</span>brush());
scheduleChange();
}
<span class="type">void</span> Context2D<span class="operator">::</span>stroke()
{
beginPainting();
m_painter<span class="operator">.</span>save();
m_painter<span class="operator">.</span>setMatrix(m_state<span class="operator">.</span>matrix<span class="operator">,</span> <span class="keyword">false</span>);
<span class="type"><a href="qpainterpath.html">QPainterPath</a></span> tmp <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>inverted()<span class="operator">.</span>map(m_path);
m_painter<span class="operator">.</span>strokePath(tmp<span class="operator">,</span> m_painter<span class="operator">.</span>pen());
m_painter<span class="operator">.</span>restore();
scheduleChange();
}
<span class="type">void</span> Context2D<span class="operator">::</span>clip()
{
m_state<span class="operator">.</span>clipPath <span class="operator">=</span> m_path;
m_state<span class="operator">.</span>flags <span class="operator">|</span><span class="operator">=</span> DirtyClippingRegion;
}
<span class="type">bool</span> Context2D<span class="operator">::</span>isPointInPath(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> x<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> y) <span class="keyword">const</span>
{
<span class="keyword">return</span> m_path<span class="operator">.</span>contains(<span class="type"><a href="qpointf.html">QPointF</a></span>(x<span class="operator">,</span> y));
}
ImageData Context2D<span class="operator">::</span>getImageData(<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sx<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sy<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sw<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sh)
{
Q_UNUSED(sx);
Q_UNUSED(sy);
Q_UNUSED(sw);
Q_UNUSED(sh);
<span class="keyword">return</span> ImageData();
}
<span class="type">void</span> Context2D<span class="operator">::</span>putImageData(ImageData image<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dx<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dy)
{
Q_UNUSED(image);
Q_UNUSED(dx);
Q_UNUSED(dy);
}
Context2D<span class="operator">::</span>Context2D(<span class="type"><a href="qobject.html">QObject</a></span> <span class="operator">*</span>parent)
: <span class="type"><a href="qobject.html">QObject</a></span>(parent)<span class="operator">,</span> m_changeTimerId(<span class="operator">-</span><span class="number">1</span>)
{
reset();
}
<span class="keyword">const</span> <span class="type"><a href="qimage.html">QImage</a></span> <span class="operator">&</span>Context2D<span class="operator">::</span>endPainting()
{
<span class="keyword">if</span> (m_painter<span class="operator">.</span>isActive())
m_painter<span class="operator">.</span>end();
<span class="keyword">return</span> m_image;
}
<span class="type">void</span> Context2D<span class="operator">::</span>beginPainting()
{
<span class="keyword">if</span> (<span class="operator">!</span>m_painter<span class="operator">.</span>isActive()) {
m_painter<span class="operator">.</span>begin(<span class="operator">&</span>m_image);
m_painter<span class="operator">.</span>setRenderHint(<span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>Antialiasing);
<span class="keyword">if</span> (<span class="operator">!</span>m_state<span class="operator">.</span>clipPath<span class="operator">.</span>isEmpty())
m_painter<span class="operator">.</span>setClipPath(m_state<span class="operator">.</span>clipPath);
m_painter<span class="operator">.</span>setBrush(m_state<span class="operator">.</span>fillStyle);
m_painter<span class="operator">.</span>setOpacity(m_state<span class="operator">.</span>globalAlpha);
<span class="type"><a href="qpen.html">QPen</a></span> pen;
pen<span class="operator">.</span>setBrush(m_state<span class="operator">.</span>strokeStyle);
<span class="keyword">if</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)
pen<span class="operator">.</span>setStyle(<span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>SolidLine);
pen<span class="operator">.</span>setCapStyle(m_state<span class="operator">.</span>lineCap);
pen<span class="operator">.</span>setJoinStyle(m_state<span class="operator">.</span>lineJoin);
pen<span class="operator">.</span>setWidthF(m_state<span class="operator">.</span>lineWidth);
pen<span class="operator">.</span>setMiterLimit(m_state<span class="operator">.</span>miterLimit);
m_painter<span class="operator">.</span>setPen(pen);
} <span class="keyword">else</span> {
<span class="keyword">if</span> ((m_state<span class="operator">.</span>flags <span class="operator">&</span> DirtyClippingRegion) <span class="operator">&</span><span class="operator">&</span> <span class="operator">!</span>m_state<span class="operator">.</span>clipPath<span class="operator">.</span>isEmpty())
m_painter<span class="operator">.</span>setClipPath(m_state<span class="operator">.</span>clipPath);
<span class="keyword">if</span> (m_state<span class="operator">.</span>flags <span class="operator">&</span> DirtyFillStyle)
m_painter<span class="operator">.</span>setBrush(m_state<span class="operator">.</span>fillStyle);
<span class="keyword">if</span> (m_state<span class="operator">.</span>flags <span class="operator">&</span> DirtyGlobalAlpha)
m_painter<span class="operator">.</span>setOpacity(m_state<span class="operator">.</span>globalAlpha);
<span class="keyword">if</span> (m_state<span class="operator">.</span>flags <span class="operator">&</span> DirtyGlobalCompositeOperation)
m_painter<span class="operator">.</span>setCompositionMode(m_state<span class="operator">.</span>globalCompositeOperation);
<span class="keyword">if</span> (m_state<span class="operator">.</span>flags <span class="operator">&</span> MDirtyPen) {
<span class="type"><a href="qpen.html">QPen</a></span> pen <span class="operator">=</span> m_painter<span class="operator">.</span>pen();
<span class="keyword">if</span> (m_state<span class="operator">.</span>flags <span class="operator">&</span> DirtyStrokeStyle)
pen<span class="operator">.</span>setBrush(m_state<span class="operator">.</span>strokeStyle);
<span class="keyword">if</span> (m_state<span class="operator">.</span>flags <span class="operator">&</span> DirtyLineWidth)
pen<span class="operator">.</span>setWidthF(m_state<span class="operator">.</span>lineWidth);
<span class="keyword">if</span> (m_state<span class="operator">.</span>flags <span class="operator">&</span> DirtyLineCap)
pen<span class="operator">.</span>setCapStyle(m_state<span class="operator">.</span>lineCap);
<span class="keyword">if</span> (m_state<span class="operator">.</span>flags <span class="operator">&</span> DirtyLineJoin)
pen<span class="operator">.</span>setJoinStyle(m_state<span class="operator">.</span>lineJoin);
<span class="keyword">if</span> (m_state<span class="operator">.</span>flags <span class="operator">&</span> DirtyMiterLimit)
pen<span class="operator">.</span>setMiterLimit(m_state<span class="operator">.</span>miterLimit);
m_painter<span class="operator">.</span>setPen(pen);
}
m_state<span class="operator">.</span>flags <span class="operator">=</span> <span class="number">0</span>;
}
}
<span class="type">void</span> Context2D<span class="operator">::</span>clear()
{
endPainting();
m_image<span class="operator">.</span>fill(<a href="qcolor.html#qRgba">qRgba</a>(<span class="number">0</span><span class="operator">,</span><span class="number">0</span><span class="operator">,</span><span class="number">0</span><span class="operator">,</span><span class="number">0</span>));
scheduleChange();
}
<span class="type">void</span> Context2D<span class="operator">::</span><a href="qtextstream.html#reset">reset</a>()
{
m_stateStack<span class="operator">.</span>clear();
m_state<span class="operator">.</span>matrix <span class="operator">=</span> <span class="type"><a href="qmatrix.html">QMatrix</a></span>();
m_state<span class="operator">.</span>clipPath <span class="operator">=</span> <span class="type"><a href="qpainterpath.html">QPainterPath</a></span>();
m_state<span class="operator">.</span>globalAlpha <span class="operator">=</span> <span class="number">1.0</span>;
m_state<span class="operator">.</span>globalCompositeOperation <span class="operator">=</span> <span class="type"><a href="qpainter.html">QPainter</a></span><span class="operator">::</span>CompositionMode_SourceOver;
m_state<span class="operator">.</span>strokeStyle <span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>black;
m_state<span class="operator">.</span>fillStyle <span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>black;
m_state<span class="operator">.</span>lineWidth <span class="operator">=</span> <span class="number">1</span>;
m_state<span class="operator">.</span>lineCap <span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>FlatCap;
m_state<span class="operator">.</span>lineJoin <span class="operator">=</span> <span class="type"><a href="qt.html">Qt</a></span><span class="operator">::</span>MiterJoin;
m_state<span class="operator">.</span>miterLimit <span class="operator">=</span> <span class="number">10</span>;
m_state<span class="operator">.</span>shadowOffsetX <span class="operator">=</span> <span class="number">0</span>;
m_state<span class="operator">.</span>shadowOffsetY <span class="operator">=</span> <span class="number">0</span>;
m_state<span class="operator">.</span>shadowBlur <span class="operator">=</span> <span class="number">0</span>;
m_state<span class="operator">.</span>shadowColor <span class="operator">=</span> <a href="qcolor.html#qRgba">qRgba</a>(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span>);
m_state<span class="operator">.</span>flags <span class="operator">=</span> AllIsFullOfDirt;
clear();
}
<span class="type">void</span> Context2D<span class="operator">::</span>setSize(<span class="type">int</span> width<span class="operator">,</span> <span class="type">int</span> height)
{
endPainting();
<span class="type"><a href="qimage.html">QImage</a></span> newi(width<span class="operator">,</span> height<span class="operator">,</span> <span class="type"><a href="qimage.html">QImage</a></span><span class="operator">::</span>Format_ARGB32_Premultiplied);
newi<span class="operator">.</span>fill(<a href="qcolor.html#qRgba">qRgba</a>(<span class="number">0</span><span class="operator">,</span><span class="number">0</span><span class="operator">,</span><span class="number">0</span><span class="operator">,</span><span class="number">0</span>));
<span class="type"><a href="qpainter.html">QPainter</a></span> p(<span class="operator">&</span>newi);
p<span class="operator">.</span>drawImage(<span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> m_image);
p<span class="operator">.</span>end();
m_image <span class="operator">=</span> newi;
scheduleChange();
}
<span class="type">void</span> Context2D<span class="operator">::</span>setSize(<span class="keyword">const</span> <span class="type"><a href="qsize.html">QSize</a></span> <span class="operator">&</span>size)
{
setSize(size<span class="operator">.</span>width()<span class="operator">,</span> size<span class="operator">.</span>height());
}
<span class="type"><a href="qsize.html">QSize</a></span> Context2D<span class="operator">::</span>size() <span class="keyword">const</span>
{
<span class="keyword">return</span> m_image<span class="operator">.</span>size();
}
<span class="type">void</span> Context2D<span class="operator">::</span>drawImage(DomImage <span class="operator">*</span>image<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dx<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dy)
{
<span class="keyword">if</span> (<span class="operator">!</span>image)
<span class="keyword">return</span>;
<span class="keyword">if</span> (dx <span class="operator"><</span> <span class="number">0</span>) {
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sx <span class="operator">=</span> <a href="qtglobal.html#qAbs">qAbs</a>(dx);
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sy <span class="operator">=</span> <a href="qtglobal.html#qAbs">qAbs</a>(dy);
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sw <span class="operator">=</span> image<span class="operator">-</span><span class="operator">></span>width() <span class="operator">-</span> sx;
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sh <span class="operator">=</span> image<span class="operator">-</span><span class="operator">></span>height() <span class="operator">-</span> sy;
drawImage(image<span class="operator">,</span> sx<span class="operator">,</span> sy<span class="operator">,</span> sw<span class="operator">,</span> sh<span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> <span class="number">0</span><span class="operator">,</span> sw<span class="operator">,</span> sh);
} <span class="keyword">else</span> {
beginPainting();
m_painter<span class="operator">.</span>drawImage(<span class="type"><a href="qpointf.html">QPointF</a></span>(dx<span class="operator">,</span> dy)<span class="operator">,</span> image<span class="operator">-</span><span class="operator">></span>image());
scheduleChange();
}
}
<span class="type">void</span> Context2D<span class="operator">::</span>drawImage(DomImage <span class="operator">*</span>image<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dx<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dy<span class="operator">,</span>
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dw<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dh)
{
<span class="keyword">if</span> (<span class="operator">!</span>image)
<span class="keyword">return</span>;
beginPainting();
m_painter<span class="operator">.</span>drawImage(<span class="type"><a href="qrectf.html">QRectF</a></span>(dx<span class="operator">,</span> dy<span class="operator">,</span> dw<span class="operator">,</span> dh)<span class="operator">.</span>toRect()<span class="operator">,</span> image<span class="operator">-</span><span class="operator">></span>image());
scheduleChange();
}
<span class="type">void</span> Context2D<span class="operator">::</span>drawImage(DomImage <span class="operator">*</span>image<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sx<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sy<span class="operator">,</span>
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sw<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> sh<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dx<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dy<span class="operator">,</span>
<span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dw<span class="operator">,</span> <span class="type"><a href="qtglobal.html#qreal-typedef">qreal</a></span> dh)
{
<span class="keyword">if</span> (<span class="operator">!</span>image)
<span class="keyword">return</span>;
beginPainting();
m_painter<span class="operator">.</span>drawImage(<span class="type"><a href="qrectf.html">QRectF</a></span>(dx<span class="operator">,</span> dy<span class="operator">,</span> dw<span class="operator">,</span> dh)<span class="operator">,</span> image<span class="operator">-</span><span class="operator">></span>image()<span class="operator">,</span>
<span class="type"><a href="qrectf.html">QRectF</a></span>(sx<span class="operator">,</span> sy<span class="operator">,</span> sw<span class="operator">,</span> sh));
scheduleChange();
}
<span class="type">void</span> Context2D<span class="operator">::</span>scheduleChange()
{
<span class="keyword">if</span> (m_changeTimerId <span class="operator">=</span><span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>)
m_changeTimerId <span class="operator">=</span> startTimer(<span class="number">0</span>);
}
<span class="type">void</span> Context2D<span class="operator">::</span>timerEvent(<span class="type"><a href="qtimerevent.html">QTimerEvent</a></span> <span class="operator">*</span>e)
{
<span class="keyword">if</span> (e<span class="operator">-</span><span class="operator">></span>timerId() <span class="operator">=</span><span class="operator">=</span> m_changeTimerId) {
killTimer(m_changeTimerId);
m_changeTimerId <span class="operator">=</span> <span class="operator">-</span><span class="number">1</span>;
<span class="keyword">emit</span> changed(endPainting());
} <span class="keyword">else</span> {
<span class="type"><a href="qobject.html">QObject</a></span><span class="operator">::</span>timerEvent(e);
}
}</pre>
</div>
<!-- @@@script/context2d/context2d.cpp -->
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