/****************************************************************************

**

** Copyright (C) 2010 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 <QDebug>

#include <QFile>

#include <QImage>

#include <QImageReader>

#include <QImageWriter>

#include <QLabel>

#include <QPainter>

#include <QSet>

#if defined(Q_OS_SYMBIAN)

# define SRCDIR ""

#endif

typedef QMap<QString, QString> QStringMap;

typedef QList<int> QIntList;

Q_DECLARE_METATYPE(QImage)

Q_DECLARE_METATYPE(QStringMap)

Q_DECLARE_METATYPE(QIntList)

Q_DECLARE_METATYPE(QImageWriter::ImageWriterError)

Q_DECLARE_METATYPE(QIODevice *)

Q_DECLARE_METATYPE(QImage::Format)

//TESTED_FILES=

class tst_QImageWriter : public QObject

{

    Q_OBJECT

public:

    tst_QImageWriter();

    virtual ~tst_QImageWriter();

public slots:

    void init();

    void cleanup();

private slots:

    void getSetCheck();

    void writeImage_data();

    void writeImage();

    void writeImage2_data();

    void writeImage2();

    void supportedFormats();

    void readWriteNonDestructive_data();

    void readWriteNonDestructive();

#if defined QTEST_HAVE_TIFF

    void largeTiff();

#endif

    void setDescription_data();

    void setDescription();

    void writeToInvalidDevice();

    void supportsOption_data();

    void supportsOption();

    void saveWithNoFormat_data();

    void saveWithNoFormat();

    void resolution_data();

    void resolution();

    void saveToTemporaryFile();

};

#ifdef Q_OS_SYMBIAN

static const QLatin1String prefix(SRCDIR "images/");

#else

static const QLatin1String prefix(SRCDIR "/images/");

#endif

static void initializePadding(QImage *image)

{

    int effectiveBytesPerLine = (image->width() * image->depth() + 7) / 8;

    int paddingBytes = image->bytesPerLine() - effectiveBytesPerLine;

    if (paddingBytes == 0)

        return;

    for (int y = 0; y < image->height(); ++y) {

        qMemSet(image->scanLine(y) + effectiveBytesPerLine, 0, paddingBytes);

    }

}

// Testing get/set functions

void tst_QImageWriter::getSetCheck()

{

    QImageWriter obj1;

    // QIODevice * QImageWriter::device()

    // void QImageWriter::setDevice(QIODevice *)

    QFile *var1 = new QFile;

    obj1.setDevice(var1);

    QCOMPARE((QIODevice *) var1, obj1.device());

    // The class should possibly handle a 0-pointer as a device, since

    // there is a default contructor, so it's "handling" a 0 device by default.

    // For example: QMovie::setDevice(0) works just fine

    obj1.setDevice((QIODevice *)0);

    QCOMPARE((QIODevice *) 0, obj1.device());

    delete var1;

    // int QImageWriter::quality()

    // void QImageWriter::setQuality(int)

    obj1.setQuality(0);

    QCOMPARE(0, obj1.quality());

    obj1.setQuality(INT_MIN);

    QCOMPARE(INT_MIN, obj1.quality());

    obj1.setQuality(INT_MAX);

    QCOMPARE(INT_MAX, obj1.quality());

    // int QImageWriter::compression()

    // void QImageWriter::setCompression(int)

    obj1.setCompression(0);

    QCOMPARE(0, obj1.compression());

    obj1.setCompression(INT_MIN);

    QCOMPARE(INT_MIN, obj1.compression());

    obj1.setCompression(INT_MAX);

    QCOMPARE(INT_MAX, obj1.compression());

    // float QImageWriter::gamma()

    // void QImageWriter::setGamma(float)

    obj1.setGamma(0.0f);

    QCOMPARE(0.0f, obj1.gamma());

    obj1.setGamma(1.1f);

    QCOMPARE(1.1f, obj1.gamma());

}

tst_QImageWriter::tst_QImageWriter()

{

}

tst_QImageWriter::~tst_QImageWriter()

{

    QDir dir(prefix);

    QStringList filesToDelete = dir.entryList(QStringList() << "gen-*" , QDir::NoDotAndDotDot | QDir::Files);

    foreach( QString file, filesToDelete) {

        QFile::remove(dir.absoluteFilePath(file));

    }

}

void tst_QImageWriter::init()

{

}

void tst_QImageWriter::cleanup()

{

}

void tst_QImageWriter::writeImage_data()

{

    QTest::addColumn<QString>("fileName");

    QTest::addColumn<bool>("lossy");

    QTest::addColumn<QByteArray>("format");

    QTest::newRow("BMP: colorful") << QString("colorful.bmp") << false << QByteArray("bmp");

    QTest::newRow("BMP: font") << QString("font.bmp") << false << QByteArray("bmp");

    QTest::newRow("XPM: marble") << QString("marble.xpm") << false << QByteArray("xpm");

    QTest::newRow("PNG: kollada") << QString("kollada.png") << false << QByteArray("png");

    QTest::newRow("PPM: teapot") << QString("teapot.ppm") << false << QByteArray("ppm");

    QTest::newRow("PBM: ship63") << QString("ship63.pbm") << true << QByteArray("pbm");

    QTest::newRow("XBM: gnus") << QString("gnus.xbm") << false << QByteArray("xbm");

    QTest::newRow("JPEG: beavis") << QString("beavis.jpg") << true << QByteArray("jpeg");

#if defined QTEST_HAVE_TIFF

    QTest::newRow("TIFF: teapot") << QString("teapot.tiff") << false << QByteArray("tiff");

#endif

}

void tst_QImageWriter::writeImage()

{

    QFETCH(QString, fileName);

    QFETCH(bool, lossy);

    QFETCH(QByteArray, format);

    QImage image;

    {

        QImageReader reader(prefix + fileName);

        image = reader.read();

        QVERIFY2(!image.isNull(), qPrintable(reader.errorString()));

    }

    {

        QImageWriter writer(prefix + "gen-" + fileName, format);

        QVERIFY(writer.write(image));

    }

    {

        // Shouldn't be able to write to read-only file

        QFile sourceFile(prefix + "gen-" + fileName);

        QFile::Permissions permissions = sourceFile.permissions();

        QVERIFY(sourceFile.setPermissions(QFile::ReadOwner | QFile::ReadUser | QFile::ReadGroup | QFile::ReadOther));

        QImageWriter writer(prefix + "gen-" + fileName, format);

        QVERIFY(!writer.write(image));

        QVERIFY(sourceFile.setPermissions(permissions));

    }

    QImage image2;

    {

        QImageReader reader(prefix + "gen-" + fileName);

        image2 = reader.read();

        QVERIFY(!image2.isNull());

    }

    if (!lossy) {

        QCOMPARE(image, image2);

    } else {

        QCOMPARE(image.format(), image2.format());

        QCOMPARE(image.depth(), image2.depth());

    }

}

void tst_QImageWriter::writeImage2_data()

{

    QTest::addColumn<QString>("fileName");

    QTest::addColumn<QByteArray>("format");

    QTest::addColumn<QImage>("image");

    const QStringList formats = QStringList() << "bmp" << "xpm" << "png"

                                              << "ppm"; //<< "jpeg";

    QImage image0(70, 70, QImage::Format_ARGB32);

    image0.fill(QColor(Qt::red).rgb());

    QImage::Format imgFormat = QImage::Format_Mono;

    while (imgFormat != QImage::NImageFormats) {

        QImage image = image0.convertToFormat(imgFormat);

        initializePadding(&image);

        foreach (const QString format, formats) {

            const QString fileName = QString("solidcolor_%1.%2").arg(imgFormat)

                                     .arg(format);

            QTest::newRow(fileName.toLatin1()) << fileName

                                               << format.toLatin1()

                                               << image;

        }

        imgFormat = QImage::Format(int(imgFormat) + 1);

    }

}

#if defined QTEST_HAVE_TIFF

void tst_QImageWriter::largeTiff()

{

#if !defined(Q_OS_WINCE) && !defined(Q_OS_SYMBIAN)

    QImage img(4096, 2048, QImage::Format_ARGB32);

    QPainter p(&img);

    img.fill(0x0);

    p.fillRect(0, 0, 4096, 2048, QBrush(Qt::CrossPattern));

    p.end();

    QByteArray array;

    QBuffer writeBuffer(&array);

    writeBuffer.open(QIODevice::WriteOnly);

    QImageWriter writer(&writeBuffer, "tiff");

    QVERIFY(writer.write(img));

    writeBuffer.close();

    QBuffer readBuffer(&array);

    readBuffer.open(QIODevice::ReadOnly);

    QImageReader reader(&readBuffer, "tiff");

    QImage img2 = reader.read();

    QVERIFY(!img2.isNull());

    QCOMPARE(img, img2);

#else

    QWARN("not tested on Symbian/WinCE");

#endif

}

#endif

/*

    Workaround for the equality operator for indexed formats

    (which fails if the colortables are different).

    Images must have the same format and size.

*/

static bool equalImageContents(const QImage &image1, const QImage &image2)

{

    switch (image1.format()) {

    case QImage::Format_Mono:

    case QImage::Format_Indexed8:

        for (int y = 0; y < image1.height(); ++y)

            for (int x = 0; x < image1.width(); ++x)

                if (image1.pixel(x, y) != image2.pixel(x, y))

                    return false;

        return true;

    default:

        return (image1 == image2);

    }

}

void tst_QImageWriter::writeImage2()

{

    QFETCH(QString, fileName);

    QFETCH(QByteArray, format);

    QFETCH(QImage, image);

    //we reduce the scope of writer so that it closes the associated file

    // and QFile::remove can actually work

    {

        QImageWriter writer(fileName, format);

        QVERIFY(writer.write(image));

    }

    QImage written;

    //we reduce the scope of reader so that it closes the associated file

    // and QFile::remove can actually work

    {

        QImageReader reader(fileName, format);

        QVERIFY(reader.read(&written));

    }

    written = written.convertToFormat(image.format());

    if (!equalImageContents(written, image)) {

        qDebug() << "image" << image.format() << image.width()

                 << image.height() << image.depth()

                 << hex << image.pixel(0, 0);

        qDebug() << "written" << written.format() << written.width()

                 << written.height() << written.depth()

                 << hex << written.pixel(0, 0);

    }

    QVERIFY(equalImageContents(written, image));

    QVERIFY(QFile::remove(fileName));

}

void tst_QImageWriter::supportedFormats()

{

    QList<QByteArray> formats = QImageWriter::supportedImageFormats();

    QList<QByteArray> sortedFormats = formats;

    qSort(sortedFormats);

    // check that the list is sorted

    QCOMPARE(formats, sortedFormats);

    QSet<QByteArray> formatSet;

    foreach (QByteArray format, formats)

        formatSet << format;

    // check that the list does not contain duplicates

    QCOMPARE(formatSet.size(), formats.size());

}

void tst_QImageWriter::readWriteNonDestructive_data()

{

    QTest::addColumn<QImage::Format>("format");

    QTest::addColumn<QImage::Format>("expectedFormat");

    QTest::addColumn<bool>("grayscale");

    QTest::newRow("tiff mono") << QImage::Format_Mono << QImage::Format_Mono << false;

    QTest::newRow("tiff indexed") << QImage::Format_Indexed8 << QImage::Format_Indexed8 << false;

    QTest::newRow("tiff rgb32") << QImage::Format_ARGB32 << QImage::Format_ARGB32 << false;

    QTest::newRow("tiff grayscale") << QImage::Format_Indexed8 << QImage::Format_Indexed8 << true;

}

void tst_QImageWriter::readWriteNonDestructive()

{

    QFETCH(QImage::Format, format);

    QFETCH(QImage::Format, expectedFormat);

    QFETCH(bool, grayscale);

    QImage image = QImage(prefix + "colorful.bmp").convertToFormat(format);

    if (grayscale) {

        QVector<QRgb> colors;

        for (int i = 0; i < 256; ++i)

            colors << qRgb(i, i, i);

        image.setColorTable(colors);

    }

    QVERIFY(image.save(prefix + "gen-readWriteNonDestructive.tiff"));

    QImage image2 = QImage(prefix + "gen-readWriteNonDestructive.tiff");

    QImage::Format readFormat = image2.format();

    QCOMPARE(readFormat, expectedFormat);

    QCOMPARE(image, image2);

}

void tst_QImageWriter::setDescription_data()

{

    QTest::addColumn<QString>("fileName");

    QTest::addColumn<QStringMap>("description");

    QMap<QString, QString> willem;

    willem["Title"] = "PngSuite";

    willem["Author"] = "Willem A.J. van Schaik (willem@schaik.com)";

    willem["Copyright"] = "Copyright Willem van Schaik, Singapore 1995-96";

    willem["Description"] = "A compilation of a set of images created to test the "

                            "various color-types of the PNG format. Included are "

                            "black&white, color, paletted, with alpha channel, with "

                            "transparency formats. All bit-depths allowed according "

                            "to the spec are present.";

    willem["Software"] = "Created on a NeXTstation color using \"pnmtopng\".";

    willem["Disclaimer"] = "Freeware.";

    QTest::newRow("PNG") << prefix + QString("gen-pngwithtext.png") << willem;

}

void tst_QImageWriter::setDescription()

{

    QFETCH(QString, fileName);

    QFETCH(QStringMap, description);

    QImageWriter writer(fileName, "png");

    foreach (QString key, description.keys())

        writer.setText(key, description.value(key));

    QVERIFY(writer.write(QImage(prefix + "kollada.png")));

    QImageReader reader(fileName);

    foreach (QString key, description.keys())

        QCOMPARE(reader.text(key), description.value(key));

}

void tst_QImageWriter::writeToInvalidDevice()

{

    QLatin1String fileName("/these/directories/do/not/exist/001.png");

    {

        QImageWriter writer(fileName);

        QVERIFY(!writer.canWrite());

        QCOMPARE(writer.error(), QImageWriter::DeviceError);

    }

    {

        QImageWriter writer(fileName);

        writer.setFormat("png");

        QVERIFY(!writer.canWrite());

        QCOMPARE(writer.error(), QImageWriter::DeviceError);

    }

    {

        QImageWriter writer(fileName);

        QImage im(10, 10, QImage::Format_ARGB32);

        QVERIFY(!writer.write(im));

        QCOMPARE(writer.error(), QImageWriter::DeviceError);

    }

    {

        QImageWriter writer(fileName);

        writer.setFormat("png");

        QImage im(10, 10, QImage::Format_ARGB32);

        QVERIFY(!writer.write(im));

        QCOMPARE(writer.error(), QImageWriter::DeviceError);

    }

}

void tst_QImageWriter::supportsOption_data()

{

    QTest::addColumn<QString>("fileName");

    QTest::addColumn<QIntList>("options");

    QTest::newRow("png") << QString("gen-black.png")

                         << (QIntList() << QImageIOHandler::Gamma

                              << QImageIOHandler::Description

                              << QImageIOHandler::Quality

                              << QImageIOHandler::Size);

#if defined QTEST_HAVE_TIFF

    QTest::newRow("tiff") << QString("gen-black.tiff")

                          << (QIntList() << QImageIOHandler::Size

                              << QImageIOHandler::CompressionRatio);

#endif

}

void tst_QImageWriter::supportsOption()

{

    QFETCH(QString, fileName);

    QFETCH(QIntList, options);

    QSet<QImageIOHandler::ImageOption> allOptions;

    allOptions << QImageIOHandler::Size

               << QImageIOHandler::ClipRect

               << QImageIOHandler::Description

               << QImageIOHandler::ScaledClipRect

               << QImageIOHandler::ScaledSize

               << QImageIOHandler::CompressionRatio

               << QImageIOHandler::Gamma

               << QImageIOHandler::Quality

               << QImageIOHandler::Name

               << QImageIOHandler::SubType

               << QImageIOHandler::IncrementalReading

               << QImageIOHandler::Endianness

               << QImageIOHandler::Animation

               << QImageIOHandler::BackgroundColor;

    QImageWriter writer(prefix + fileName);

    for (int i = 0; i < options.size(); ++i) {

        QVERIFY(writer.supportsOption(QImageIOHandler::ImageOption(options.at(i))));