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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#ifndef QPAINTENGINE_P_H
#define QPAINTENGINE_P_H
//
// W A R N I N G
// -------------
//
// This file is not part of the Qt API. It exists for the convenience
// of other Qt classes. This header file may change from version to
// version without notice, or even be removed.
//
// We mean it.
//
#include <QtGui/private/qtguiglobal_p.h>
#include "QtGui/qpainter.h"
#include "QtGui/qpaintengine.h"
#include "QtGui/qregion.h"
#include "private/qobject_p.h"
QT_BEGIN_NAMESPACE
class QPaintDevice;
class Q_GUI_EXPORT QPaintEnginePrivate
{
Q_DECLARE_PUBLIC(QPaintEngine)
public:
QPaintEnginePrivate() : pdev(nullptr), q_ptr(nullptr), currentClipDevice(nullptr), hasSystemTransform(0),
hasSystemViewport(0) {}
virtual ~QPaintEnginePrivate();
QPaintDevice *pdev;
QPaintEngine *q_ptr;
QRegion baseSystemClip;
QRegion systemClip;
QRect systemRect;
QRegion systemViewport;
QTransform systemTransform;
QPaintDevice *currentClipDevice;
uint hasSystemTransform : 1;
uint hasSystemViewport : 1;
inline void updateSystemClip()
{
systemClip = baseSystemClip;
if (systemClip.isEmpty())
return;
if (hasSystemTransform) {
if (systemTransform.type() <= QTransform::TxTranslate)
systemClip.translate(qRound(systemTransform.dx()), qRound(systemTransform.dy()));
else
systemClip = systemTransform.map(systemClip);
}
// Make sure we're inside the viewport.
if (hasSystemViewport) {
systemClip &= systemViewport;
if (systemClip.isEmpty()) {
// We don't want to paint without system clip, so set it to 1 pixel :)
systemClip = QRect(systemViewport.boundingRect().topLeft(), QSize(1, 1));
}
}
}
inline void setSystemTransform(const QTransform &xform)
{
systemTransform = xform;
hasSystemTransform = !xform.isIdentity();
updateSystemClip();
if (q_ptr->state)
systemStateChanged();
}
inline void setSystemViewport(const QRegion ®ion)
{
systemViewport = region;
hasSystemViewport = !systemViewport.isEmpty();
updateSystemClip();
if (q_ptr->state)
systemStateChanged();
}
inline void setSystemTransformAndViewport(const QTransform &xform, const QRegion ®ion)
{
systemTransform = xform;
hasSystemTransform = !xform.isIdentity();
systemViewport = region;
hasSystemViewport = !systemViewport.isEmpty();
updateSystemClip();
if (q_ptr->state)
systemStateChanged();
}
virtual void systemStateChanged() { }
void drawBoxTextItem(const QPointF &p, const QTextItemInt &ti);
static QPaintEnginePrivate *get(QPaintEngine *paintEngine) { return paintEngine->d_func(); }
virtual QPaintEngine *aggregateEngine() { return nullptr; }
virtual Qt::HANDLE nativeHandle() { return nullptr; }
};
QT_END_NAMESPACE
#endif // QPAINTENGINE_P_H
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