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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the plugins 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.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qiosbackingstore.h"
#include "qioswindow.h"
#include <QtGui/QOpenGLContext>
#include <QtGui/private/qwindow_p.h>
#include <QtDebug>
QT_BEGIN_NAMESPACE
/*!
\class QIOSBackingStore
QBackingStore enables the use of QPainter to paint on a QWindow, as opposed
to rendering to a QWindow through the use of OpenGL with QOpenGLContext.
*/
QIOSBackingStore::QIOSBackingStore(QWindow *window)
: QRasterBackingStore(window)
{
// We use the surface both for raster operations and for GL drawing (when
// we blit the raster image), so the type needs to cover both use cases.
if (window->surfaceType() == QSurface::RasterSurface)
window->setSurfaceType(QSurface::RasterGLSurface);
Q_ASSERT_X(window->surfaceType() != QSurface::OpenGLSurface, "QIOSBackingStore",
"QBackingStore on iOS can only be used with raster-enabled surfaces.");
}
QIOSBackingStore::~QIOSBackingStore()
{
}
void QIOSBackingStore::flush(QWindow *window, const QRegion ®ion, const QPoint &offset)
{
Q_ASSERT(!qt_window_private(window)->compositing);
Q_UNUSED(region);
Q_UNUSED(offset);
if (window != this->window()) {
// We skip flushing raster-based child windows, to avoid the extra cost of copying from the
// parent FBO into the child FBO. Since the child is already drawn inside the parent FBO, it
// will become visible when flushing the parent. The only case we end up not supporting is if
// the child window overlaps a sibling window that's draws using a separate QOpenGLContext.
return;
}
static QPlatformTextureList emptyTextureList;
composeAndFlush(window, region, offset, &emptyTextureList, false);
}
QT_END_NAMESPACE
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