qt5base-lts/tests/auto/gui/image/qpicture/tst_qpicture.cpp

/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/


#include <QtTest/QtTest>

#include <qpicture.h>
#include <qpainter.h>
#include <qimage.h>
#include <qdesktopwidget.h>
#include <qapplication.h>
#include <limits.h>

class tst_QPicture : public QObject
{
    Q_OBJECT

public:
    tst_QPicture();

private slots:
    void getSetCheck();
    void devType();
    void paintingActive();
    void boundingRect();
    void swap();
    void operator_lt_lt();

    void save_restore();

    void boundaryValues_data();
    void boundaryValues();
};

// Testing get/set functions
void tst_QPicture::getSetCheck()
{
    QPictureIO obj1;
    // const QPicture & QPictureIO::picture()
    // void QPictureIO::setPicture(const QPicture &)
    // const char * QPictureIO::format()
    // void QPictureIO::setFormat(const char *)
    const char var2[] = "PNG";
    obj1.setFormat(var2);
    QCOMPARE(var2, obj1.format());
    obj1.setFormat((char *)0);
    // The format is stored internally in a QString, so return is always a valid char *
    QVERIFY(QString(obj1.format()).isEmpty());

    // const char * QPictureIO::parameters()
    // void QPictureIO::setParameters(const char *)
    const char var3[] = "Bogus data";
    obj1.setParameters(var3);
    QCOMPARE(var3, obj1.parameters());
    obj1.setParameters((char *)0);
    // The format is stored internally in a QString, so return is always a valid char *
    QVERIFY(QString(obj1.parameters()).isEmpty());
}

tst_QPicture::tst_QPicture()
{
}

void tst_QPicture::devType()
{
    QPicture p;
    QCOMPARE( p.devType(), (int)QInternal::Picture );
}

void tst_QPicture::paintingActive()
{
    // actually implemented in QPainter but QPicture is a good
    // example of an external paint device
    QPicture p;
    QVERIFY( !p.paintingActive() );
    QPainter pt( &p );
    QVERIFY( p.paintingActive() );
    pt.end();
    QVERIFY( !p.paintingActive() );
}

void tst_QPicture::boundingRect()
{
    QPicture p1;
    // default value
    QVERIFY( !p1.boundingRect().isValid() );

    QRect r1( 20, 30, 5, 15 );
    p1.setBoundingRect( r1 );
    QCOMPARE( p1.boundingRect(), r1 );
    p1.setBoundingRect(QRect());

    QPainter pt( &p1 );
    pt.drawLine( 10, 20, 110, 80 );
    pt.end();

    // assignment and copy constructor
    QRect r2( 10, 20, 100, 60 );
    QCOMPARE( p1.boundingRect(), r2 );
    QPicture p2( p1 );
    QCOMPARE( p1.boundingRect(), r2 );
    QPicture p3;
    p3 = p1;
    QCOMPARE( p1.boundingRect(), r2 );

    {
        QPicture p4;
        QPainter p(&p4);
        p.drawLine(0, 0, 5, 0);
        p.drawLine(0, 0, 0, 5);
        p.end();

        QRect r3(0, 0, 5, 5);
        QCOMPARE(p4.boundingRect(), r3);
    }
}

void tst_QPicture::swap()
{
    QPicture p1, p2;
    QPainter(&p1).drawLine(0, 0, 5, 5);
    QPainter(&p2).drawLine(0, 3, 3, 0);
    QCOMPARE(p1.boundingRect(), QRect(0,0,5,5));
    QCOMPARE(p2.boundingRect(), QRect(0,0,3,3));
    p1.swap(p2);
    QCOMPARE(p1.boundingRect(), QRect(0,0,3,3));
    QCOMPARE(p2.boundingRect(), QRect(0,0,5,5));
}

// operator<< and operator>>
void tst_QPicture::operator_lt_lt()
{
    // streaming of null pictures
    {
	QPicture pic1, pic2;
	QByteArray ba( 100, 0 );
	QDataStream str1( &ba, QIODevice::WriteOnly );
	str1 << pic1;
	QDataStream str2( &ba, QIODevice::ReadOnly );
	str2 >> pic2;
 	QVERIFY( pic2.isNull() );
    }

    // picture with a simple line, checking bitwise equality
    {
	QPicture pic1, pic2;
	QPainter p( &pic1 );
	p.drawLine( 10, 20, 30, 40 );
	p.end();
	QByteArray ba( 10 * pic1.size(), 0 );
	QDataStream str1( &ba, QIODevice::WriteOnly );
	str1 << pic1;
	QDataStream str2( &ba, QIODevice::ReadOnly );
	str2 >> pic2;
	QCOMPARE( pic1.size(), pic2.size() );
	QVERIFY( memcmp( pic1.data(), pic2.data(), pic1.size() ) == 0 );
    }
}

static QPointF scalePoint(const QPointF &point, QPaintDevice *sourceDevice, QPaintDevice *destDevice)
{
    return QPointF(point.x() * qreal(destDevice->logicalDpiX()) / qreal(sourceDevice->logicalDpiX()),
                   point.y() * qreal(destDevice->logicalDpiY()) / qreal(sourceDevice->logicalDpiY()));
}

static QRectF scaleRect(const QRectF &rect, QPaintDevice *sourceDevice, QPaintDevice *destDevice)
{
    return QRectF(rect.left() * qreal(destDevice->logicalDpiX()) / qreal(sourceDevice->logicalDpiX()),
                  rect.top() * qreal(destDevice->logicalDpiY()) / qreal(sourceDevice->logicalDpiY()),
                  rect.width() * qreal(destDevice->logicalDpiX()) / qreal(sourceDevice->logicalDpiX()),
                  rect.height() * qreal(destDevice->logicalDpiY()) / qreal(sourceDevice->logicalDpiY()));
}

static void paintStuff(QPainter *p)
{
    QPaintDevice *screenDevice = QApplication::desktop();
    p->drawRect(scaleRect(QRectF(100, 100, 100, 100), screenDevice, p->device()));
    p->save();
    p->translate(scalePoint(QPointF(10, 10), screenDevice, p->device()));
    p->restore();
    p->drawRect(scaleRect(QRectF(100, 100, 100, 100), screenDevice, p->device()));
}

/* See task: 41469
   Problem is that the state is not properly restored if the basestate of
   the painter is different when the picture data was created compared to
   the base state of the painter when it is played back.
 */
void tst_QPicture::save_restore()
{
    QPicture pic;
    QPainter p;
    p.begin(&pic);
    paintStuff(&p);
    p.end();

    QPixmap pix1(300, 300);
    pix1.fill(Qt::white);
    p.begin(&pix1);
    p.drawPicture(50, 50, pic);
    p.end();

    QPixmap pix2(300, 300);
    pix2.fill(Qt::white);
    p.begin(&pix2);
    p.translate(50, 50);
    paintStuff(&p);
    p.end();

    QVERIFY( pix1.toImage() == pix2.toImage() );
}

void tst_QPicture::boundaryValues_data()
{
    QTest::addColumn<int>("x");
    QTest::addColumn<int>("y");
    QTest::newRow("max x") << INT_MAX << 50;
    QTest::newRow("max y") << 50 << INT_MAX;
    QTest::newRow("max x and y") << INT_MAX << INT_MAX;

    QTest::newRow("min x") << INT_MIN << 50;
    QTest::newRow("min y") << 50 << INT_MIN;
    QTest::newRow("min x and y") << INT_MIN << INT_MIN;

    QTest::newRow("min x, max y") << INT_MIN << INT_MAX;
    QTest::newRow("max x, min y") << INT_MAX << INT_MIN;

}

void tst_QPicture::boundaryValues()
{
    QPicture picture;

    QPainter painter;
    painter.begin(&picture);

    QFETCH(int, x);
    QFETCH(int, y);
    painter.drawPoint(QPoint(x, y));

    painter.end();

    
}


QTEST_MAIN(tst_QPicture)
#include "tst_qpicture.moc"