<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html> <html lang="en"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>context2d.cpp Example File | Qt Script</title> <link rel="stylesheet" type="text/css" href="style/offline-simple.css" /> <script type="text/javascript"> document.getElementsByTagName("link").item(0).setAttribute("href", "style/offline.css"); // loading style sheet breaks anchors that were jumped to before // so force jumping to anchor again setTimeout(function() { var anchor = location.hash; // need to jump to different anchor first (e.g. none) location.hash = "#"; setTimeout(function() { location.hash = anchor; }, 0); }, 0); </script> </head> <body> <div class="header" id="qtdocheader"> <div class="main"> <div class="main-rounded"> <div class="navigationbar"> <table><tr> <td >Qt 5.12</td><td ><a href="qtscript-index.html">Qt Script</a></td><td ><a href="qtscript-script-context2d-example.html">Context2D Example</a></td><td >context2d.cpp Example File</td></tr></table><table class="buildversion"><tr> <td id="buildversion" width="100%" align="right"><a href="qtscript-index.html">Qt 5.12.6 Reference Documentation</a></td> </tr></table> </div> </div> <div class="content"> <div class="line"> <div class="content mainContent"> <div class="sidebar"><div class="sidebar-content" id="sidebar-content"></div></div> <h1 class="title">context2d.cpp Example File</h1> <span class="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) 2017 The Qt Company Ltd. ** Contact: https://www.qt.io/licensing/ ** ** This file is part of the examples of the Qt Toolkit. ** ** $QT_BEGIN_LICENSE:BSD$ ** Commercial License Usage ** Licensees holding valid commercial Qt licenses may use this file in ** accordance with the commercial license agreement provided with the ** Software or, alternatively, in accordance with the terms contained in ** a written agreement between you and The Qt Company. For licensing terms ** and conditions see https://www.qt.io/terms-conditions. For further ** information use the contact form at https://www.qt.io/contact-us. ** ** BSD License Usage ** Alternatively, 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 <qmath.h></span> <span class="preprocessor">#define qClamp(val, min, max) qMin(qMax(val, min), max)</span> <span class="keyword">static</span> <span class="type">QList</span><span class="operator"><</span><span class="type">qreal</span><span class="operator">></span> parseNumbersList(<span class="type">QString</span><span class="operator">::</span>const_iterator <span class="operator">&</span>itr) { <span class="type">QList</span><span class="operator"><</span><span class="type">qreal</span><span class="operator">></span> points; <span class="type">QString</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">QString</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">QColor</span> colorFromString(<span class="keyword">const</span> <span class="type">QString</span> <span class="operator">&</span>name) { <span class="type">QString</span><span class="operator">::</span>const_iterator itr <span class="operator">=</span> name<span class="operator">.</span>constBegin(); <span class="type">QList</span><span class="operator"><</span><span class="type">qreal</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">QColor</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">QColor</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">QColor</span>(); } <span class="keyword">return</span> <span class="type">QColor</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">qreal</span>(<span class="number">0</span>)<span class="operator">,</span> <span class="type">qreal</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">qreal</span>(<span class="number">0</span>)<span class="operator">,</span> <span class="type">qreal</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">qreal</span>(<span class="number">0</span>)<span class="operator">,</span> <span class="type">qreal</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">QColor</span>(name); } } <span class="keyword">static</span> <span class="type">QPainter</span><span class="operator">::</span>CompositionMode compositeOperatorFromString(<span class="keyword">const</span> <span class="type">QString</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</span><span class="operator">::</span>CompositionMode_Xor; } <span class="keyword">return</span> <span class="type">QPainter</span><span class="operator">::</span>CompositionMode_SourceOver; } <span class="keyword">static</span> <span class="type">QString</span> compositeOperatorToString(<span class="type">QPainter</span><span class="operator">::</span>CompositionMode op) { <span class="keyword">switch</span> (op) { <span class="keyword">case</span> <span class="type">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QPainter</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">QString</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">qreal</span> x<span class="operator">,</span> <span class="type">qreal</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">qreal</span> angle) { m_state<span class="operator">.</span>matrix<span class="operator">.</span>rotate(qRadiansToDegrees(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">qreal</span> x<span class="operator">,</span> <span class="type">qreal</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">qreal</span> m11<span class="operator">,</span> <span class="type">qreal</span> m12<span class="operator">,</span> <span class="type">qreal</span> m21<span class="operator">,</span> <span class="type">qreal</span> m22<span class="operator">,</span> <span class="type">qreal</span> dx<span class="operator">,</span> <span class="type">qreal</span> dy) { <span class="type">QMatrix</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">qreal</span> m11<span class="operator">,</span> <span class="type">qreal</span> m12<span class="operator">,</span> <span class="type">qreal</span> m21<span class="operator">,</span> <span class="type">qreal</span> m22<span class="operator">,</span> <span class="type">qreal</span> dx<span class="operator">,</span> <span class="type">qreal</span> dy) { <span class="type">QMatrix</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">QString</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">QString</span> <span class="operator">&</span>op) { <span class="type">QPainter</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">QVariant</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">QVariant</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">QColor</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">QVariant</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">QVariant</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">QColor</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">qreal</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">qreal</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">qreal</span> x0<span class="operator">,</span> <span class="type">qreal</span> y0<span class="operator">,</span> <span class="type">qreal</span> x1<span class="operator">,</span> <span class="type">qreal</span> y1) { <span class="type">QLinearGradient</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">qreal</span> x0<span class="operator">,</span> <span class="type">qreal</span> y0<span class="operator">,</span> <span class="type">qreal</span> r0<span class="operator">,</span> <span class="type">qreal</span> x1<span class="operator">,</span> <span class="type">qreal</span> y1<span class="operator">,</span> <span class="type">qreal</span> r1) { <span class="type">QRadialGradient</span> g(<span class="type">QPointF</span>(x1<span class="operator">,</span> y1)<span class="operator">,</span> r0<span class="operator">+</span>r1<span class="operator">,</span> <span class="type">QPointF</span>(x0<span class="operator">,</span> y0)); <span class="keyword">return</span> CanvasGradient(g); } <span class="type">qreal</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">qreal</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">QString</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">Qt</span><span class="operator">::</span>FlatCap: <span class="keyword">return</span> <span class="string">"butt"</span>; <span class="keyword">case</span> <span class="type">Qt</span><span class="operator">::</span>SquareCap: <span class="keyword">return</span> <span class="string">"square"</span>; <span class="keyword">case</span> <span class="type">Qt</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">QString</span>(); } <span class="type">void</span> Context2D<span class="operator">::</span>setLineCap(<span class="keyword">const</span> <span class="type">QString</span> <span class="operator">&</span>capString) { <span class="type">Qt</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">Qt</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">Qt</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">Qt</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">QString</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">Qt</span><span class="operator">::</span>RoundJoin: <span class="keyword">return</span> <span class="string">"round"</span>; <span class="keyword">case</span> <span class="type">Qt</span><span class="operator">::</span>BevelJoin: <span class="keyword">return</span> <span class="string">"bevel"</span>; <span class="keyword">case</span> <span class="type">Qt</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">QString</span>(); } <span class="type">void</span> Context2D<span class="operator">::</span>setLineJoin(<span class="keyword">const</span> <span class="type">QString</span> <span class="operator">&</span>joinString) { <span class="type">Qt</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">Qt</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">Qt</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">Qt</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">qreal</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">qreal</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">qreal</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">qreal</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">qreal</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">QString</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">qreal</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">qreal</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">qreal</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">QString</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">qreal</span> x<span class="operator">,</span> <span class="type">qreal</span> y<span class="operator">,</span> <span class="type">qreal</span> w<span class="operator">,</span> <span class="type">qreal</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">QPainter</span><span class="operator">::</span>CompositionMode_Source); m_painter<span class="operator">.</span>fillRect(<span class="type">QRectF</span>(x<span class="operator">,</span> y<span class="operator">,</span> w<span class="operator">,</span> h)<span class="operator">,</span> <span class="type">QColor</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">qreal</span> x<span class="operator">,</span> <span class="type">qreal</span> y<span class="operator">,</span> <span class="type">qreal</span> w<span class="operator">,</span> <span class="type">qreal</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">QRectF</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">qreal</span> x<span class="operator">,</span> <span class="type">qreal</span> y<span class="operator">,</span> <span class="type">qreal</span> w<span class="operator">,</span> <span class="type">qreal</span> h) { <span class="type">QPainterPath</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">QPainterPath</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">qreal</span> x<span class="operator">,</span> <span class="type">qreal</span> y) { <span class="type">QPointF</span> pt <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>map(<span class="type">QPointF</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">qreal</span> x<span class="operator">,</span> <span class="type">qreal</span> y) { <span class="type">QPointF</span> pt <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>map(<span class="type">QPointF</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">qreal</span> cpx<span class="operator">,</span> <span class="type">qreal</span> cpy<span class="operator">,</span> <span class="type">qreal</span> x<span class="operator">,</span> <span class="type">qreal</span> y) { <span class="type">QPointF</span> cp <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>map(<span class="type">QPointF</span>(cpx<span class="operator">,</span> cpy)); <span class="type">QPointF</span> xy <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>map(<span class="type">QPointF</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">qreal</span> cp1x<span class="operator">,</span> <span class="type">qreal</span> cp1y<span class="operator">,</span> <span class="type">qreal</span> cp2x<span class="operator">,</span> <span class="type">qreal</span> cp2y<span class="operator">,</span> <span class="type">qreal</span> x<span class="operator">,</span> <span class="type">qreal</span> y) { <span class="type">QPointF</span> cp1 <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>map(<span class="type">QPointF</span>(cp1x<span class="operator">,</span> cp1y)); <span class="type">QPointF</span> cp2 <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>map(<span class="type">QPointF</span>(cp2x<span class="operator">,</span> cp2y)); <span class="type">QPointF</span> end <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>map(<span class="type">QPointF</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">qreal</span> x1<span class="operator">,</span> <span class="type">qreal</span> y1<span class="operator">,</span> <span class="type">qreal</span> x2<span class="operator">,</span> <span class="type">qreal</span> y2<span class="operator">,</span> <span class="type">qreal</span> radius) { <span class="comment">//FIXME: this is surely busted</span> <span class="type">QPointF</span> st <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>map(<span class="type">QPointF</span>(x1<span class="operator">,</span> y1)); <span class="type">QPointF</span> end <span class="operator">=</span> m_state<span class="operator">.</span>matrix<span class="operator">.</span>map(<span class="type">QPointF</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">qreal</span> x<span class="operator">,</span> <span class="type">qreal</span> y<span class="operator">,</span> <span class="type">qreal</span> w<span class="operator">,</span> <span class="type">qreal</span> h) { <span class="type">QPainterPath</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">qreal</span> xc<span class="operator">,</span> <span class="type">qreal</span> yc<span class="operator">,</span> <span class="type">qreal</span> radius<span class="operator">,</span> <span class="type">qreal</span> sar<span class="operator">,</span> <span class="type">qreal</span> ear<span class="operator">,</span> bool 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> qRadiansToDegrees(sar); <span class="type">float</span> ea <span class="operator">=</span> qRadiansToDegrees(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>(qFuzzyCompare(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> qFuzzyCompare(qAbs(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">QPainterPath</span> path; path<span class="operator">.</span>moveTo(<span class="type">QPointF</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">QPainterPath</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; } bool Context2D<span class="operator">::</span>isPointInPath(<span class="type">qreal</span> x<span class="operator">,</span> <span class="type">qreal</span> y) <span class="keyword">const</span> { <span class="keyword">return</span> m_path<span class="operator">.</span>contains(<span class="type">QPointF</span>(x<span class="operator">,</span> y)); } ImageData Context2D<span class="operator">::</span>getImageData(<span class="type">qreal</span> sx<span class="operator">,</span> <span class="type">qreal</span> sy<span class="operator">,</span> <span class="type">qreal</span> sw<span class="operator">,</span> <span class="type">qreal</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">qreal</span> dx<span class="operator">,</span> <span class="type">qreal</span> dy) { Q_UNUSED(image); Q_UNUSED(dx); Q_UNUSED(dy); } Context2D<span class="operator">::</span>Context2D(<span class="type">QObject</span> <span class="operator">*</span>parent) : <span class="type">QObject</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">QImage</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">QPainter</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">QPen</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">Qt</span><span class="operator">::</span>NoPen) pen<span class="operator">.</span>setStyle(<span class="type">Qt</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">QPen</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(qRgba(<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>reset() { m_stateStack<span class="operator">.</span>clear(); m_state<span class="operator">.</span>matrix <span class="operator">=</span> <span class="type">QMatrix</span>(); m_state<span class="operator">.</span>clipPath <span class="operator">=</span> <span class="type">QPainterPath</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">QPainter</span><span class="operator">::</span>CompositionMode_SourceOver; m_state<span class="operator">.</span>strokeStyle <span class="operator">=</span> <span class="type">Qt</span><span class="operator">::</span>black; m_state<span class="operator">.</span>fillStyle <span class="operator">=</span> <span class="type">Qt</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">Qt</span><span class="operator">::</span>FlatCap; m_state<span class="operator">.</span>lineJoin <span class="operator">=</span> <span class="type">Qt</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> qRgba(<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">QImage</span> newi(width<span class="operator">,</span> height<span class="operator">,</span> <span class="type">QImage</span><span class="operator">::</span>Format_ARGB32_Premultiplied); newi<span class="operator">.</span>fill(qRgba(<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">QPainter</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">QSize</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">QSize</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">qreal</span> dx<span class="operator">,</span> <span class="type">qreal</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">qreal</span> sx <span class="operator">=</span> qAbs(dx); <span class="type">qreal</span> sy <span class="operator">=</span> qAbs(dy); <span class="type">qreal</span> sw <span class="operator">=</span> image<span class="operator">-</span><span class="operator">></span>width() <span class="operator">-</span> sx; <span class="type">qreal</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">QPointF</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">qreal</span> dx<span class="operator">,</span> <span class="type">qreal</span> dy<span class="operator">,</span> <span class="type">qreal</span> dw<span class="operator">,</span> <span class="type">qreal</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">QRectF</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">qreal</span> sx<span class="operator">,</span> <span class="type">qreal</span> sy<span class="operator">,</span> <span class="type">qreal</span> sw<span class="operator">,</span> <span class="type">qreal</span> sh<span class="operator">,</span> <span class="type">qreal</span> dx<span class="operator">,</span> <span class="type">qreal</span> dy<span class="operator">,</span> <span class="type">qreal</span> dw<span class="operator">,</span> <span class="type">qreal</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">QRectF</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">QRectF</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">QTimerEvent</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">QObject</span><span class="operator">::</span>timerEvent(e); } } </pre> </div> <!-- @@@script/context2d/context2d.cpp --> </div> </div> </div> </div> </div> <div class="footer"> <p> <acronym title="Copyright">©</acronym> 2019 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners.<br/> The documentation provided herein is licensed under the terms of the <a href="http://www.gnu.org/licenses/fdl.html">GNU Free Documentation License version 1.3</a> as published by the Free Software Foundation.<br/> Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners. </p> </div> </body> </html>