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qt5base-lts/tests/auto/qtransform/tst_qtransform.cpp
Qt by Nokia 38be0d1383 Initial import from the monolithic Qt. 
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Branched from the monolithic repo, Qt master branch, at commit
896db169ea224deb96c59ce8af800d019de63f12
2011-04-27 12:05:43 +02:00

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/****************************************************************************
**
** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** This file is part of the test suite of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** No Commercial Usage
** This file contains pre-release code and may not be distributed.
** You may use this file in accordance with the terms and conditions
** contained in the Technology Preview License Agreement accompanying
** this package.
**
** 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 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.
**
** If you have questions regarding the use of this file, please contact
** Nokia at qt-info@nokia.com.
**
**
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtTest/QtTest>
#include "qtransform.h"
#include <math.h>
#include <qpolygon.h>
#include <qdebug.h>
Q_DECLARE_METATYPE(QRect)
//TESTED_CLASS=
//TESTED_FILES=
class tst_QTransform : public QObject
{
Q_OBJECT
public:
tst_QTransform();
virtual ~tst_QTransform();
public slots:
void init();
void cleanup();
private slots:
void mapRect_data();
void operator_star_qrect_data();
void mapToPolygon_data();
void mapRect();
void operator_star_qrect();
void assignments();
void mapToPolygon();
void translate();
void scale();
void matrix();
void testOffset();
void types();
void scalarOps();
void transform();
void mapEmptyPath();
void boundingRect();
void controlPointRect();
void inverted_data();
void inverted();
void projectivePathMapping();
void mapInt();
void mapPathWithPoint();
private:
void mapping_data();
};
Q_DECLARE_METATYPE(QTransform)
Q_DECLARE_METATYPE(QPolygon)
tst_QTransform::tst_QTransform()
{
}
tst_QTransform::~tst_QTransform()
{
}
void tst_QTransform::init()
{
// No initialisation is required
}
void tst_QTransform::cleanup()
{
// No cleanup is required.
}
#ifdef Q_OS_WIN32
#define M_PI 3.14159265897932384626433832795f
#endif
void tst_QTransform::mapRect_data()
{
mapping_data();
// rotations that are not multiples of 90 degrees. mapRect returns the bounding rect here.
qreal deg = -45;
QTest::newRow( "rot 45 a" )
<< QTransform().rotate(deg)
<< QRect( 0, 0, 10, 10 )
<< QPolygon( QRect( 0, -7, 14, 14 ) );
QTest::newRow( "rot 45 b" )
<< QTransform().rotate(deg)
<< QRect( 10, 20, 30, 40 )
<< QPolygon( QRect( 21, -14, 50, 49 ) );
QTest::newRow( "rot 45 c" )
<< QTransform().rotate(deg).scale(10, 10)
<< QRect( 0, 0, 10, 10 )
<< QPolygon( QRect( 0, -71, 141, 142 ) );
QTest::newRow( "rot 45 d" )
<< QTransform().rotate(deg).scale(10, 10)
<< QRect( 10, 20, 30, 40 )
<< QPolygon( QRect( 212, -141, 495, 495 ) );
deg = 45;
QTest::newRow( "rot -45 a" )
<< QTransform().rotate(deg)
<< QRect( 0, 0, 10, 10 )
<< QPolygon( QRect( -7, 0, 14, 14 ) );
QTest::newRow( "rot -45 b" )
<< QTransform().rotate(deg)
<< QRect( 10, 20, 30, 40 )
<< QPolygon( QRect( -35, 21, 49, 50 ) );
QTest::newRow( "rot -45 c" )
<< QTransform().rotate(deg).scale(10, 10)
<< QRect( 0, 0, 10, 10 )
<< QPolygon( QRect( -71, 0, 142, 141 ) );
QTest::newRow( "rot -45 d" )
<< QTransform().rotate(deg).scale(10, 10)
<< QRect( 10, 20, 30, 40 )
<< QPolygon( QRect( -354, 212, 495, 495 ) );
}
void tst_QTransform::operator_star_qrect_data()
{
mapping_data();
}
void tst_QTransform::mapToPolygon_data()
{
mapping_data();
}
void tst_QTransform::mapping_data()
{
//create the testtable instance and define the elements
QTest::addColumn<QTransform>("matrix");
QTest::addColumn<QRect>("src");
QTest::addColumn<QPolygon>("res");
//next we fill it with data
// identity
QTest::newRow( "identity" )
<< QTransform()
<< QRect( 10, 20, 30, 40 )
<< QPolygon( QRect( 10, 20, 30, 40 ) );
// scaling
QTest::newRow( "scale 0" )
<< QTransform().scale(2, 2)
<< QRect( 10, 20, 30, 40 )
<< QPolygon( QRect( 20, 40, 60, 80 ) );
QTest::newRow( "scale 1" )
<< QTransform().scale(10, 10)
<< QRect( 10, 20, 30, 40 )
<< QPolygon( QRect( 100, 200, 300, 400 ) );
// mirroring
QTest::newRow( "mirror 0" )
<< QTransform().scale(-1, 1)
<< QRect( 10, 20, 30, 40 )
<< QPolygon( QRect( -40, 20, 30, 40 ) );
QTest::newRow( "mirror 1" )
<< QTransform().scale(1, -1)
<< QRect( 10, 20, 30, 40 )
<< QPolygon( QRect( 10, -60, 30, 40 ) );
QTest::newRow( "mirror 2" )
<< QTransform().scale(-1, -1)
<< QRect( 10, 20, 30, 40 )
<< QPolygon( QRect( -40, -60, 30, 40 ) );
QTest::newRow( "mirror 3" )
<< QTransform().scale(-2, -2)
<< QRect( 10, 20, 30, 40 )
<< QPolygon( QRect( -80, -120, 60, 80 ) );
QTest::newRow( "mirror 4" )
<< QTransform().scale(-10, -10)
<< QRect( 10, 20, 30, 40 )
<< QPolygon( QRect( -400, -600, 300, 400 ) );
QTest::newRow( "mirror 5" )
<< QTransform().scale(-1, 1)
<< QRect( 0, 0, 30, 40 )
<< QPolygon( QRect( -30, 0, 30, 40 ) );
QTest::newRow( "mirror 6" )
<< QTransform().scale(1, -1)
<< QRect( 0, 0, 30, 40 )
<< QPolygon( QRect( 0, -40, 30, 40 ) );
QTest::newRow( "mirror 7" )
<< QTransform().scale(-1, -1)
<< QRect( 0, 0, 30, 40 )
<< QPolygon( QRect( -30, -40, 30, 40 ) );
QTest::newRow( "mirror 8" )
<< QTransform().scale(-2, -2)
<< QRect( 0, 0, 30, 40 )
<< QPolygon( QRect( -60, -80, 60, 80 ) );
QTest::newRow( "mirror 9" )
<< QTransform().scale(-10, -10) << QRect( 0, 0, 30, 40 )
<< QPolygon( QRect( -300, -400, 300, 400 ) );
// rotations
float deg = 0.;
QTest::newRow( "rot 0 a" )
<< QTransform().rotate(deg)
<< QRect( 0, 0, 30, 40 )
<< QPolygon ( QRect( 0, 0, 30, 40 ) );
deg = 0.00001f;
QTest::newRow( "rot 0 b" )
<< QTransform().rotate(deg)
<< QRect( 0, 0, 30, 40 )
<< QPolygon ( QRect( 0, 0, 30, 40 ) );
deg = 0.;
QTest::newRow( "rot 0 c" )
<< QTransform().rotate(deg)
<< QRect( 10, 20, 30, 40 )
<< QPolygon ( QRect( 10, 20, 30, 40 ) );
deg = 0.00001f;
QTest::newRow( "rot 0 d" )
<< QTransform().rotate(deg)
<< QRect( 10, 20, 30, 40 )
<< QPolygon ( QRect( 10, 20, 30, 40 ) );
// rotations
deg = -90.f;
QTest::newRow( "rotscale 90 a" )
<< QTransform().rotate(deg).scale(10, 10)
<< QRect( 0, 0, 30, 40 )
<< QPolygon( QRect( 0, -300, 400, 300 ) );
deg = -90.00001f;
QTest::newRow( "rotscale 90 b" )
<< QTransform().rotate(deg).scale(10, 10)
<< QRect( 0, 0, 30, 40 )
<< QPolygon( QRect( 0, -300, 400, 300 ) );
deg = -90.f;
QTest::newRow( "rotscale 90 c" )
<< QTransform().rotate(deg).scale(10, 10)
<< QRect( 10, 20, 30, 40 )
<< QPolygon( QRect( 200, -400, 400, 300 ) );
deg = -90.00001f;
QTest::newRow( "rotscale 90 d" )
<< QTransform().rotate(deg).scale(10, 10)
<< QRect( 10, 20, 30, 40 )
<< QPolygon( QRect( 200, -400, 400, 300 ) );
deg = 180.f;
QTest::newRow( "rotscale 180 a" )
<< QTransform().rotate(deg).scale(10, 10)
<< QRect( 0, 0, 30, 40 )
<< QPolygon( QRect( -300, -400, 300, 400 ) );
deg = 180.000001f;
QTest::newRow( "rotscale 180 b" )
<< QTransform().rotate(deg).scale(10, 10)
<< QRect( 0, 0, 30, 40 )
<< QPolygon( QRect( -300, -400, 300, 400 ) );
deg = 180.f;
QTest::newRow( "rotscale 180 c" )
<< QTransform().rotate(deg).scale(10, 10)
<< QRect( 10, 20, 30, 40 )
<< QPolygon( QRect( -400, -600, 300, 400 ) );
deg = 180.000001f;
QTest::newRow( "rotscale 180 d" )
<< QTransform().rotate(deg).scale(10, 10)
<< QRect( 10, 20, 30, 40 )
<< QPolygon( QRect( -400, -600, 300, 400 ) );
deg = -270.f;
QTest::newRow( "rotscale 270 a" )
<< QTransform().rotate(deg).scale(10, 10)
<< QRect( 0, 0, 30, 40 )
<< QPolygon( QRect( -400, 0, 400, 300 ) );
deg = -270.0000001f;
QTest::newRow( "rotscale 270 b" )
<< QTransform().rotate(deg).scale(10, 10)
<< QRect( 0, 0, 30, 40 )
<< QPolygon( QRect( -400, 0, 400, 300 ) );
deg = -270.f;
QTest::newRow( "rotscale 270 c" )
<< QTransform().rotate(deg).scale(10, 10)
<< QRect( 10, 20, 30, 40 )
<< QPolygon( QRect( -600, 100, 400, 300 ) );
deg = -270.000001f;
QTest::newRow( "rotscale 270 d" )
<< QTransform().rotate(deg).scale(10, 10)
<< QRect( 10, 20, 30, 40 )
<< QPolygon( QRect( -600, 100, 400, 300 ) );
}
void tst_QTransform::mapRect()
{
QFETCH( QTransform, matrix );
QFETCH( QRect, src );
QFETCH( QPolygon, res );
QRect mapped = matrix.mapRect(src);
QCOMPARE( mapped, res.boundingRect().adjusted(0, 0, -1, -1) );
QRectF r = matrix.mapRect(QRectF(src));
QRect ir(r.topLeft().toPoint(), r.bottomRight().toPoint() - QPoint(1, 1));
QCOMPARE( mapped, ir );
}
void tst_QTransform::operator_star_qrect()
{
#if 0
QFETCH( QTransform, matrix );
QFETCH( QRect, src );
QFETCH( QPolygon, res );
QCOMPARE( (matrix * src), QRegion(res) );
#endif
}
void tst_QTransform::assignments()
{
QTransform m;
m.scale(2, 3);
m.rotate(45);
m.shear(4, 5);
QTransform c1(m);
QCOMPARE(m.m11(), c1.m11());
QCOMPARE(m.m12(), c1.m12());
QCOMPARE(m.m21(), c1.m21());
QCOMPARE(m.m22(), c1.m22());
QCOMPARE(m.dx(), c1.dx());
QCOMPARE(m.dy(), c1.dy());
QTransform c2 = m;
QCOMPARE(m.m11(), c2.m11());
QCOMPARE(m.m12(), c2.m12());
QCOMPARE(m.m21(), c2.m21());
QCOMPARE(m.m22(), c2.m22());
QCOMPARE(m.dx(), c2.dx());
QCOMPARE(m.dy(), c2.dy());
}
void tst_QTransform::mapToPolygon()
{
QFETCH( QTransform, matrix );
QFETCH( QRect, src );
QFETCH( QPolygon, res );
QPolygon poly = matrix.mapToPolygon(src);
// don't care about starting point
bool equal = false;
for (int i = 0; i < poly.size(); ++i) {
QPolygon rot;
for (int j = i; j < poly.size(); ++j)
rot << poly[j];
for (int j = 0; j < i; ++j)
rot << poly[j];
if (rot == res)
equal = true;
}
QVERIFY(equal);
}
void tst_QTransform::translate()
{
QTransform m( 1, 2, 3, 4, 5, 6 );
QTransform res2( m );
QTransform res( 1, 2, 3, 4, 75, 106 );
m.translate( 10, 20 );
QVERIFY( m == res );
m.translate( -10, -20 );
QVERIFY( m == res2 );
QVERIFY( QTransform::fromTranslate( 0, 0 ).type() == QTransform::TxNone );
QVERIFY( QTransform::fromTranslate( 10, 0 ).type() == QTransform::TxTranslate );
QVERIFY( QTransform::fromTranslate( -1, 5 ) == QTransform().translate( -1, 5 ));
QVERIFY( QTransform::fromTranslate( 0, 0 ) == QTransform());
}
void tst_QTransform::scale()
{
QTransform m( 1, 2, 3, 4, 5, 6 );
QTransform res2( m );
QTransform res( 10, 20, 60, 80, 5, 6 );
m.scale( 10, 20 );
QVERIFY( m == res );
m.scale( 1./10., 1./20. );
QVERIFY( m == res2 );
QVERIFY( QTransform::fromScale( 1, 1 ).type() == QTransform::TxNone );
QVERIFY( QTransform::fromScale( 2, 4 ).type() == QTransform::TxScale );
QVERIFY( QTransform::fromScale( 2, 4 ) == QTransform().scale( 2, 4 ));
QVERIFY( QTransform::fromScale( 1, 1 ) == QTransform());
}
void tst_QTransform::matrix()
{
QMatrix mat1;
mat1.scale(0.3, 0.7);
mat1.translate(53.3, 94.4);
mat1.rotate(45);
QMatrix mat2;
mat2.rotate(33);
mat2.scale(0.6, 0.6);
mat2.translate(13.333, 7.777);
QTransform tran1(mat1);
QTransform tran2(mat2);
QTransform dummy;
dummy.setMatrix(mat1.m11(), mat1.m12(), 0,
mat1.m21(), mat1.m22(), 0,
mat1.dx(), mat1.dy(), 1);
QVERIFY(tran1 == dummy);
QVERIFY(tran1.inverted() == dummy.inverted());
QVERIFY(tran1.inverted() == QTransform(mat1.inverted()));
QVERIFY(tran2.inverted() == QTransform(mat2.inverted()));
QMatrix mat3 = mat1 * mat2;
QTransform tran3 = tran1 * tran2;
QVERIFY(QTransform(mat3) == tran3);
/* QMatrix::operator==() doesn't use qFuzzyCompare(), which
* on win32-g++ results in a failure. So we work around it by
* calling QTranform::operator==(), which performs a fuzzy compare. */
QCOMPARE(QTransform(mat3), QTransform(tran3.toAffine()));
QTransform tranInv = tran1.inverted();
QMatrix matInv = mat1.inverted();
QRect rect(43, 70, 200, 200);
QPoint pt(43, 66);
QVERIFY(tranInv.map(pt) == matInv.map(pt));
QVERIFY(tranInv.map(pt) == matInv.map(pt));
QPainterPath path;
path.moveTo(55, 60);
path.lineTo(110, 110);
path.quadTo(220, 50, 10, 20);
path.closeSubpath();
QVERIFY(tranInv.map(path) == matInv.map(path));
}
void tst_QTransform::testOffset()
{
QTransform trans;
const QMatrix &aff = trans.toAffine();
QCOMPARE((void*)(&aff), (void*)(&trans));
}
void tst_QTransform::types()
{
QTransform m1;
QCOMPARE(m1.type(), QTransform::TxNone);
m1.translate(1.0f, 0.0f);
QCOMPARE(m1.type(), QTransform::TxTranslate);
QCOMPARE(m1.inverted().type(), QTransform::TxTranslate);
m1.scale(1.0f, 2.0f);
QCOMPARE(m1.type(), QTransform::TxScale);
QCOMPARE(m1.inverted().type(), QTransform::TxScale);
m1.rotate(45.0f);
QCOMPARE(m1.type(), QTransform::TxRotate);
QCOMPARE(m1.inverted().type(), QTransform::TxRotate);
m1.shear(0.5f, 0.25f);
QCOMPARE(m1.type(), QTransform::TxShear);
QCOMPARE(m1.inverted().type(), QTransform::TxShear);
m1.rotate(45.0f, Qt::XAxis);
QCOMPARE(m1.type(), QTransform::TxProject);
m1.shear(0.5f, 0.25f);
QCOMPARE(m1.type(), QTransform::TxProject);
m1.rotate(45.0f);
QCOMPARE(m1.type(), QTransform::TxProject);
m1.scale(1.0f, 2.0f);
QCOMPARE(m1.type(), QTransform::TxProject);
m1.translate(1.0f, 0.0f);
QCOMPARE(m1.type(), QTransform::TxProject);
QTransform m2(1.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f,
-1.0f, -1.0f, 1.0f);
QCOMPARE(m2.type(), QTransform::TxTranslate);
QCOMPARE((m1 * m2).type(), QTransform::TxProject);
m1 *= QTransform();
QCOMPARE(m1.type(), QTransform::TxProject);
m1 *= QTransform(1.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f,
1.0f, 0.0f, 1.0f);
QCOMPARE(m1.type(), QTransform::TxProject);
m2.reset();
QCOMPARE(m2.type(), QTransform::TxNone);
m2.setMatrix(1.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 1.0f);
QCOMPARE(m2.type(), QTransform::TxNone);
m2 *= QTransform();
QCOMPARE(m2.type(), QTransform::TxNone);
m2.setMatrix(2.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 1.0f);
QCOMPARE(m2.type(), QTransform::TxScale);
m2 *= QTransform();
QCOMPARE(m2.type(), QTransform::TxScale);
m2.setMatrix(0.0f, 1.0f, 0.0f,
1.0f, 0.0f, 0.0f,
0.0f, 1.0f, 1.0f);
QCOMPARE(m2.type(), QTransform::TxRotate);
m2 *= QTransform();
QCOMPARE(m2.type(), QTransform::TxRotate);
m2.setMatrix(1.0f, 0.0f, 0.5f,
0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 1.0f);
QCOMPARE(m2.type(), QTransform::TxProject);
m2 *= QTransform();
QCOMPARE(m2.type(), QTransform::TxProject);
m2.setMatrix(1.0f, 1.0f, 0.0f,
1.0f, 0.0f, 0.0f,
0.0f, 1.0f, 1.0f);
QCOMPARE(m2.type(), QTransform::TxShear);
m2 *= m2.inverted();
QCOMPARE(m2.type(), QTransform::TxNone);
m2.translate(5.0f, 5.0f);
m2.rotate(45.0f);
m2.rotate(-45.0f);
QCOMPARE(m2.type(), QTransform::TxTranslate);
m2.scale(2.0f, 3.0f);
m2.shear(1.0f, 0.0f);
m2.shear(-1.0f, 0.0f);
QCOMPARE(m2.type(), QTransform::TxScale);
m2 *= QTransform(1.0f, 1.0f, 0.0f,
0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 1.0f);
QCOMPARE(m2.type(), QTransform::TxShear);
m2 *= QTransform(1.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f,
1.0f, 0.0f, 1.0f);
QCOMPARE(m2.type(), QTransform::TxShear);
QTransform m3(1.8f, 0.0f, 0.0f,
0.0f, 1.8f, 0.0f,
0.0f, 0.0f, 1.0f);
QCOMPARE(m3.type(), QTransform::TxScale);
m3.translate(5.0f, 5.0f);
QCOMPARE(m3.type(), QTransform::TxScale);
QCOMPARE(m3.inverted().type(), QTransform::TxScale);
m3.setMatrix(1.0f, 0.0f, 0.0f,
0.0f, 1.0f, 0.0f,
0.0f, 0.0f, 2.0f);
QCOMPARE(m3.type(), QTransform::TxProject);
m3.setMatrix(0.0f, 2.0f, 0.0f,
1.0f, 0.0f, 0.0f,
0.0f, 0.0f, 2.0f);
QCOMPARE(m3.type(), QTransform::TxProject);
QTransform m4;
m4.scale(5, 5);
m4.translate(4, 2);
m4.rotate(45);
QCOMPARE(m4.type(), QTransform::TxRotate);
QTransform m5;
m5.scale(5, 5);
m5 = m5.adjoint() / m5.determinant();
QCOMPARE(m5.type(), QTransform::TxScale);
}
void tst_QTransform::scalarOps()
{
QTransform t;
QCOMPARE(t.m11(), 1.);
QCOMPARE(t.m33(), 1.);
QCOMPARE(t.m21(), 0.);
t = QTransform() + 3;
QCOMPARE(t.m11(), 4.);
QCOMPARE(t.m33(), 4.);
QCOMPARE(t.m21(), 3.);
t = t - 3;
QCOMPARE(t.m11(), 1.);
QCOMPARE(t.m33(), 1.);
QCOMPARE(t.m21(), 0.);
QCOMPARE(t.isIdentity(), true);
t += 3;
t = t * 2;
QCOMPARE(t.m11(), 8.);
QCOMPARE(t.m33(), 8.);
QCOMPARE(t.m21(), 6.);
}
void tst_QTransform::transform()
{
QTransform t;
t.rotate(30, Qt::YAxis);
t.translate(15, 10);
t.scale(2, 2);
t.rotate(30);
t.shear(0.5, 0.5);
QTransform a, b, c, d, e;
a.rotate(30, Qt::YAxis);
b.translate(15, 10);
c.scale(2, 2);
d.rotate(30);
e.shear(0.5, 0.5);
QVERIFY(qFuzzyCompare(t, e * d * c * b * a));
}
void tst_QTransform::mapEmptyPath()
{
QPainterPath path;
path.moveTo(10, 10);
path.lineTo(10, 10);
QCOMPARE(QTransform().map(path), path);
}
void tst_QTransform::boundingRect()
{
QPainterPath path;
path.moveTo(10, 10);
path.lineTo(10, 10);
QCOMPARE(path.boundingRect(), QRectF(10, 10, 0, 0));
}
void tst_QTransform::controlPointRect()
{
QPainterPath path;
path.moveTo(10, 10);
path.lineTo(10, 10);
QCOMPARE(path.controlPointRect(), QRectF(10, 10, 0, 0));
}
void tst_QTransform::inverted_data()
{
QTest::addColumn<QTransform>("matrix");
QTest::newRow("identity")
<< QTransform();
QTest::newRow("TxTranslate")
<< QTransform().translate(200, 10);
QTest::newRow("TxScale")
<< QTransform().scale(5, 2);
QTest::newRow("TxTranslate TxScale")
<< QTransform().translate(100, -10).scale(40, 2);
QTest::newRow("TxScale TxTranslate")
<< QTransform().scale(40, 2).translate(100, -10);
QTest::newRow("TxRotate")
<< QTransform().rotate(40, Qt::ZAxis);
QTest::newRow("TxRotate TxScale")
<< QTransform().rotate(60, Qt::ZAxis).scale(2, 0.25);
QTest::newRow("TxScale TxRotate")
<< QTransform().scale(2, 0.25).rotate(30, Qt::ZAxis);
QTest::newRow("TxRotate TxScale TxTranslate")
<< QTransform().rotate(60, Qt::ZAxis).scale(2, 0.25).translate(200, -3000);
QTest::newRow("TxRotate TxTranslate TxScale")
<< QTransform().rotate(60, Qt::ZAxis).translate(200, -3000).scale(19, 77);
QTest::newRow("TxShear")
<< QTransform().shear(10, 10);
QTest::newRow("TxShear TxRotate")
<< QTransform().shear(10, 10).rotate(45, Qt::ZAxis);
QTest::newRow("TxShear TxRotate TxScale")
<< QTransform().shear(10, 10).rotate(45, Qt::ZAxis).scale(19, 81);
QTest::newRow("TxTranslate TxShear TxRotate TxScale")
<< QTransform().translate(150, -1).shear(10, 10).rotate(45, Qt::ZAxis).scale(19, 81);
const qreal s = 500000;
QTransform big;
big.scale(s, s);
QTest::newRow("big") << big;
QTransform small;
small.scale(1/s, 1/s);
QTest::newRow("small") << small;
}
void tst_QTransform::inverted()
{
if (sizeof(qreal) != sizeof(double))
QSKIP("precision error if qreal is not double", SkipAll);
QFETCH(QTransform, matrix);
const QTransform inverted = matrix.inverted();
QVERIFY(matrix.isIdentity() == inverted.isIdentity());
QVERIFY(matrix.type() == inverted.type());
QVERIFY((matrix * inverted).isIdentity());
QVERIFY((inverted * matrix).isIdentity());
}
void tst_QTransform::projectivePathMapping()
{
QPainterPath path;
path.addRect(-50, -50, 100, 100);
const QRectF view(0, 0, 1024, 1024);
QVERIFY(view.intersects(path.boundingRect()));
for (int i = 0; i < 85; i += 5) {
QTransform transform;
transform.translate(512, 512);
transform.rotate(i, Qt::YAxis);
const QPainterPath mapped = transform.map(path);
QVERIFY(view.intersects(mapped.boundingRect()));
QVERIFY(transform.inverted().mapRect(view).intersects(path.boundingRect()));
}
}
void tst_QTransform::mapInt()
{
int x = 0;
int y = 0;
QTransform::fromTranslate(10, 10).map(x, y, &x, &y);
QCOMPARE(x, 10);
QCOMPARE(y, 10);
}
void tst_QTransform::mapPathWithPoint()
{
QPainterPath p(QPointF(10, 10));
p = QTransform::fromTranslate(10, 10).map(p);
QCOMPARE(p.currentPosition(), QPointF(20, 20));
}
QTEST_APPLESS_MAIN(tst_QTransform)
#include "tst_qtransform.moc"
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