/****************************************************************************+
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**+
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** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (qt-info@nokia.com)+
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**+
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** This file is part of the QtGui module of the Qt Toolkit.+
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**+
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** $QT_BEGIN_LICENSE:LGPL$+
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** No Commercial Usage+
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** This file contains pre-release code and may not be distributed.+
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** You may use this file in accordance with the terms and conditions+
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** contained in the Technology Preview License Agreement accompanying+
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** this package.+
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**+
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** GNU Lesser General Public License Usage+
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** Alternatively, this file may be used under the terms of the GNU Lesser+
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** General Public License version 2.1 as published by the Free Software+
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** Foundation and appearing in the file LICENSE.LGPL included in the+
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** packaging of this file.  Please review the following information to+
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** ensure the GNU Lesser General Public License version 2.1 requirements+
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at qt-info@nokia.com.+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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**+
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** $QT_END_LICENSE$+
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**+
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****************************************************************************/+
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+
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#include "qwindowsurface_mac_p.h"+
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+
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#include <private/qt_mac_p.h>+
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#include <private/qt_cocoa_helpers_mac_p.h>+
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#include <QtGui/qwidget.h>+
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+
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QT_BEGIN_NAMESPACE+
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+
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struct QMacWindowSurfacePrivate+
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{+
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    QWidget *widget;+
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    QPixmap device;+
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};+
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+
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QMacWindowSurface::QMacWindowSurface(QWidget *widget)+
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    : QWindowSurface(widget), d_ptr(new QMacWindowSurfacePrivate)+
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{+
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    d_ptr->widget = widget;+
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}+
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+
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QMacWindowSurface::~QMacWindowSurface()+
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{+
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    delete d_ptr;+
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}+
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+
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QPaintDevice *QMacWindowSurface::paintDevice()+
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{+
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    return &d_ptr->device;+
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}+
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+
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void QMacWindowSurface::flush(QWidget *widget, const QRegion &rgn, const QPoint &offset)+
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{+
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    Q_UNUSED(offset);+
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+
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    // Get a context for the widget.+
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#ifndef QT_MAC_USE_COCOA+
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    CGContextRef context;+
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    CGrafPtr port = GetWindowPort(qt_mac_window_for(widget));+
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    QDBeginCGContext(port, &context);+
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#else+
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    extern CGContextRef qt_mac_graphicsContextFor(QWidget *);+
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    CGContextRef context = qt_mac_graphicsContextFor(widget);+
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#endif+
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    CGContextSaveGState(context);+
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+
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    // Flip context.+
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    CGContextTranslateCTM(context, 0, widget->height());+
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    CGContextScaleCTM(context, 1, -1);+
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+
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    // Clip to region.+
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    const QVector<QRect> &rects = rgn.rects();+
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    for (int i = 0; i < rects.size(); ++i) {+
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        const QRect &rect = rects.at(i);+
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        CGContextAddRect(context, CGRectMake(rect.x(), rect.y(), rect.width(), rect.height()));+
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    }+
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    CGContextClip(context);+
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+
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    // Draw the image onto the window.+
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    const CGRect dest = CGRectMake(0, 0, widget->width(), widget->height());+
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    const CGImageRef image = d_ptr->device.toMacCGImageRef();+
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    qt_mac_drawCGImage(context, &dest, image);+
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    CFRelease(image);+
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+
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    // Restore context.+
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    CGContextRestoreGState(context);+
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#ifndef QT_MAC_USE_COCOA+
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    QDEndCGContext(port, &context);+
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#else+
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    CGContextFlush(context);+
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#endif+
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}+
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+
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void QMacWindowSurface::setGeometry(const QRect &rect)+
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{+
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    QWindowSurface::setGeometry(rect);+
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    const QSize size = rect.size();+
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    if (d_ptr->device.size() != size)+
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        d_ptr->device = QPixmap(size);+
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}+
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+
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bool QMacWindowSurface::scroll(const QRegion &area, int dx, int dy)+
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{+
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    if (d_ptr->device.size().isNull())+
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        return false;+
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+
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    QCFType<CGImageRef> image = d_ptr->device.toMacCGImageRef();+
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    const QRect rect(area.boundingRect());+
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    const CGRect dest = CGRectMake(rect.x(), rect.y(), rect.width(), rect.height());+
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    QCFType<CGImageRef> subimage = CGImageCreateWithImageInRect(image, dest);+
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    QCFType<CGContextRef> context = qt_mac_cg_context(&d_ptr->device);+
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    CGContextTranslateCTM(context, dx, dy);+
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    qt_mac_drawCGImage(context, &dest, subimage);+
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    return true;+
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}+
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+
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QT_END_NAMESPACE+
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