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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd.
** Contact: http://www.qt.io/licensing/
**
** This file is part of the QtGui module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL21$
** 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 http://www.qt.io/terms-conditions. For further
** information use the contact form at http://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 2.1 or version 3 as published by the Free
** Software Foundation and appearing in the file LICENSE.LGPLv21 and
** LICENSE.LGPLv3 included in the packaging of this file. Please review the
** following information to ensure the GNU Lesser General Public License
** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** As a special exception, The Qt Company gives you certain additional
** rights. These rights are described in The Qt Company LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef QPLATFORMBACKINGSTORE_H
#define QPLATFORMBACKINGSTORE_H
//
// W A R N I N G
// -------------
//
// This file is part of the QPA API and is not meant to be used
// in applications. Usage of this API may make your code
// source and binary incompatible with future versions of Qt.
//
#include <QtCore/qrect.h>
#include <QtCore/qobject.h>
#include <QtGui/qwindow.h>
#include <QtGui/qregion.h>
#include <QtGui/qopengl.h>
QT_BEGIN_NAMESPACE
class QRegion;
class QRect;
class QPoint;
class QImage;
class QPlatformBackingStorePrivate;
class QPlatformWindow;
class QPlatformTextureList;
class QPlatformTextureListPrivate;
class QOpenGLContext;
class QPlatformGraphicsBuffer;
#ifndef QT_NO_OPENGL
class Q_GUI_EXPORT QPlatformTextureList : public QObject
{
Q_OBJECT
Q_DECLARE_PRIVATE(QPlatformTextureList)
public:
enum Flag {
StacksOnTop = 0x01
};
Q_DECLARE_FLAGS(Flags, Flag)
explicit QPlatformTextureList(QObject *parent = 0);
~QPlatformTextureList();
int count() const;
bool isEmpty() const { return count() == 0; }
GLuint textureId(int index) const;
QRect geometry(int index) const;
QWidget *widget(int index);
Flags flags(int index) const;
void lock(bool on);
bool isLocked() const;
void appendTexture(QWidget *widget, GLuint textureId, const QRect &geometry, Flags flags = 0);
void clear();
Q_SIGNALS:
void locked(bool);
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QPlatformTextureList::Flags)
#endif
class Q_GUI_EXPORT QPlatformBackingStore
{
public:
explicit QPlatformBackingStore(QWindow *window);
virtual ~QPlatformBackingStore();
QWindow *window() const;
virtual QPaintDevice *paintDevice() = 0;
// 'window' can be a child window, in which case 'region' is in child window coordinates and
// offset is the (child) window's offset in relation to the window surface.
virtual void flush(QWindow *window, const QRegion ®ion, const QPoint &offset) = 0;
#ifndef QT_NO_OPENGL
virtual void composeAndFlush(QWindow *window, const QRegion ®ion, const QPoint &offset,
QPlatformTextureList *textures, QOpenGLContext *context,
bool translucentBackground);
virtual QImage toImage() const;
virtual GLuint toTexture(const QRegion &dirtyRegion, QSize *textureSize, bool *needsSwizzle) const;
#endif
virtual QPlatformGraphicsBuffer *graphicsBuffer() const;
virtual void resize(const QSize &size, const QRegion &staticContents) = 0;
virtual bool scroll(const QRegion &area, int dx, int dy);
virtual void beginPaint(const QRegion &);
virtual void endPaint();
private:
QPlatformBackingStorePrivate *d_ptr;
};
QT_END_NAMESPACE
#endif // QPLATFORMBACKINGSTORE_H
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