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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QPAINTENGINE_ALPHA_P_H
#define QPAINTENGINE_ALPHA_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 <QtPrintSupport/private/qtprintsupportglobal_p.h>
#ifndef QT_NO_PRINTER
#include "private/qpaintengine_p.h"
#include <QtPrintSupport/qtprintsupportglobal.h>
QT_BEGIN_NAMESPACE
class QAlphaPaintEnginePrivate;
class Q_PRINTSUPPORT_EXPORT QAlphaPaintEngine : public QPaintEngine
{
Q_DECLARE_PRIVATE(QAlphaPaintEngine)
public:
~QAlphaPaintEngine();
virtual bool begin(QPaintDevice *pdev);
virtual bool end();
virtual void updateState(const QPaintEngineState &state);
virtual void drawPath(const QPainterPath &path);
virtual void drawPolygon(const QPointF *points, int pointCount, PolygonDrawMode mode);
virtual void drawPixmap(const QRectF &r, const QPixmap &pm, const QRectF &sr);
virtual void drawTextItem(const QPointF &p, const QTextItem &textItem);
virtual void drawTiledPixmap(const QRectF &r, const QPixmap &pixmap, const QPointF &s);
protected:
QAlphaPaintEngine(QAlphaPaintEnginePrivate &data, PaintEngineFeatures devcaps = 0);
QRegion alphaClipping() const;
bool continueCall() const;
void flushAndInit(bool init = true);
void cleanUp();
};
class QAlphaPaintEnginePrivate : public QPaintEnginePrivate
{
Q_DECLARE_PUBLIC(QAlphaPaintEngine)
public:
QAlphaPaintEnginePrivate();
~QAlphaPaintEnginePrivate();
int m_pass;
QPicture *m_pic;
QPaintEngine *m_picengine;
QPainter *m_picpainter;
QPaintEngine::PaintEngineFeatures m_savedcaps;
QPaintDevice *m_pdev;
QRegion m_alphargn;
QRegion m_cliprgn;
mutable QRegion m_cachedDirtyRgn;
mutable int m_numberOfCachedRects;
QVector<QRect> m_dirtyRects;
bool m_hasalpha;
bool m_alphaPen;
bool m_alphaBrush;
bool m_alphaOpacity;
bool m_advancedPen;
bool m_advancedBrush;
bool m_complexTransform;
bool m_emulateProjectiveTransforms;
bool m_continueCall;
QTransform m_transform;
QPen m_pen;
void addAlphaRect(const QRectF &rect);
void addDirtyRect(const QRectF &rect) { m_dirtyRects.append(rect.toAlignedRect()); }
bool canSeeTroughBackground(bool somethingInRectHasAlpha, const QRectF &rect) const;
QRectF addPenWidth(const QPainterPath &path);
void drawAlphaImage(const QRectF &rect);
QRect toRect(const QRectF &rect) const;
bool fullyContained(const QRectF &rect) const;
void resetState(QPainter *p);
};
QT_END_NAMESPACE
#endif // QT_NO_PRINTER
#endif // QPAINTENGINE_ALPHA_P_H
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