1 /**************************************************************************** 2 ** 3 ** Copyright (C) 2016 The Qt Company Ltd. 4 ** Contact: https://www.qt.io/licensing/ 5 ** 6 ** This file is part of the QtGui module of the Qt Toolkit. 7 ** 8 ** $QT_BEGIN_LICENSE:LGPL$ 9 ** Commercial License Usage 10 ** Licensees holding valid commercial Qt licenses may use this file in 11 ** accordance with the commercial license agreement provided with the 12 ** Software or, alternatively, in accordance with the terms contained in 13 ** a written agreement between you and The Qt Company. For licensing terms 14 ** and conditions see https://www.qt.io/terms-conditions. For further 15 ** information use the contact form at https://www.qt.io/contact-us. 16 ** 17 ** GNU Lesser General Public License Usage 18 ** Alternatively, this file may be used under the terms of the GNU Lesser 19 ** General Public License version 3 as published by the Free Software 20 ** Foundation and appearing in the file LICENSE.LGPL3 included in the 21 ** packaging of this file. Please review the following information to 22 ** ensure the GNU Lesser General Public License version 3 requirements 23 ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. 24 ** 25 ** GNU General Public License Usage 26 ** Alternatively, this file may be used under the terms of the GNU 27 ** General Public License version 2.0 or (at your option) the GNU General 28 ** Public license version 3 or any later version approved by the KDE Free 29 ** Qt Foundation. The licenses are as published by the Free Software 30 ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 31 ** included in the packaging of this file. Please review the following 32 ** information to ensure the GNU General Public License requirements will 33 ** be met: https://www.gnu.org/licenses/gpl-2.0.html and 34 ** https://www.gnu.org/licenses/gpl-3.0.html. 35 ** 36 ** $QT_END_LICENSE$ 37 ** 38 ****************************************************************************/ 39 40 #ifndef QPAINTENGINE_P_H 41 #define QPAINTENGINE_P_H 42 43 // 44 // W A R N I N G 45 // ------------- 46 // 47 // This file is not part of the Qt API. It exists for the convenience 48 // of other Qt classes. This header file may change from version to 49 // version without notice, or even be removed. 50 // 51 // We mean it. 52 // 53 54 #include <QtGui/private/qtguiglobal_p.h> 55 #include "QtGui/qpainter.h" 56 #include "QtGui/qpaintengine.h" 57 #include "QtGui/qregion.h" 58 #include "private/qobject_p.h" 59 60 QT_BEGIN_NAMESPACE 61 62 class QPaintDevice; 63 64 class Q_GUI_EXPORT QPaintEnginePrivate 65 { Q_DECLARE_PUBLIC(QPaintEngine)66 Q_DECLARE_PUBLIC(QPaintEngine) 67 public: 68 QPaintEnginePrivate() : pdev(nullptr), q_ptr(nullptr), currentClipDevice(nullptr), hasSystemTransform(0), 69 hasSystemViewport(0) {} 70 virtual ~QPaintEnginePrivate(); 71 72 QPaintDevice *pdev; 73 QPaintEngine *q_ptr; 74 QRegion baseSystemClip; 75 QRegion systemClip; 76 QRect systemRect; 77 QRegion systemViewport; 78 QTransform systemTransform; 79 QPaintDevice *currentClipDevice; 80 uint hasSystemTransform : 1; 81 uint hasSystemViewport : 1; 82 updateSystemClip()83 inline void updateSystemClip() 84 { 85 systemClip = baseSystemClip; 86 if (systemClip.isEmpty()) 87 return; 88 89 if (hasSystemTransform) { 90 if (systemTransform.type() <= QTransform::TxTranslate) 91 systemClip.translate(qRound(systemTransform.dx()), qRound(systemTransform.dy())); 92 else 93 systemClip = systemTransform.map(systemClip); 94 } 95 96 // Make sure we're inside the viewport. 97 if (hasSystemViewport) { 98 systemClip &= systemViewport; 99 if (systemClip.isEmpty()) { 100 // We don't want to paint without system clip, so set it to 1 pixel :) 101 systemClip = QRect(systemViewport.boundingRect().topLeft(), QSize(1, 1)); 102 } 103 } 104 } 105 setSystemTransform(const QTransform & xform)106 inline void setSystemTransform(const QTransform &xform) 107 { 108 systemTransform = xform; 109 hasSystemTransform = !xform.isIdentity(); 110 updateSystemClip(); 111 if (q_ptr->state) 112 systemStateChanged(); 113 } 114 setSystemViewport(const QRegion & region)115 inline void setSystemViewport(const QRegion ®ion) 116 { 117 systemViewport = region; 118 hasSystemViewport = !systemViewport.isEmpty(); 119 updateSystemClip(); 120 if (q_ptr->state) 121 systemStateChanged(); 122 } 123 setSystemTransformAndViewport(const QTransform & xform,const QRegion & region)124 inline void setSystemTransformAndViewport(const QTransform &xform, const QRegion ®ion) 125 { 126 systemTransform = xform; 127 hasSystemTransform = !xform.isIdentity(); 128 systemViewport = region; 129 hasSystemViewport = !systemViewport.isEmpty(); 130 updateSystemClip(); 131 if (q_ptr->state) 132 systemStateChanged(); 133 } 134 systemStateChanged()135 virtual void systemStateChanged() { } 136 137 void drawBoxTextItem(const QPointF &p, const QTextItemInt &ti); 138 get(QPaintEngine * paintEngine)139 static QPaintEnginePrivate *get(QPaintEngine *paintEngine) { return paintEngine->d_func(); } 140 aggregateEngine()141 virtual QPaintEngine *aggregateEngine() { return nullptr; } nativeHandle()142 virtual Qt::HANDLE nativeHandle() { return nullptr; } 143 }; 144 145 QT_END_NAMESPACE 146 147 #endif // QPAINTENGINE_P_H 148