Simplify portion of NCLX color profile code

Allows listing the supported mime types

.gitignore

@@ -20,3 +20,4 @@ random_seed
 CMakeLists.txt.user*
 *.unc-backup*
 .cmake/
+/.clang-format

CMakeLists.txt

@@ -5,7 +5,7 @@ project(KImageFormats)
 set (CMAKE_CXX_STANDARD 14)
 
 include(FeatureSummary)
-find_package(ECM 5.75.0  NO_MODULE)
+find_package(ECM 5.79.0  NO_MODULE)
 set_package_properties(ECM PROPERTIES TYPE REQUIRED DESCRIPTION "Extra CMake Modules." URL "https://commits.kde.org/extra-cmake-modules")
 feature_summary(WHAT REQUIRED_PACKAGES_NOT_FOUND FATAL_ON_MISSING_REQUIRED_PACKAGES)
 
@@ -19,7 +19,7 @@ include(KDECMakeSettings)
 
 include(CheckIncludeFiles)
 
-set(REQUIRED_QT_VERSION 5.12.0)
+set(REQUIRED_QT_VERSION 5.14.0)
 find_package(Qt5Gui ${REQUIRED_QT_VERSION} REQUIRED NO_MODULE)
 
 find_package(KF5Archive)
@@ -47,11 +47,18 @@ set_package_properties(OpenEXR PROPERTIES
     TYPE OPTIONAL
     PURPOSE "Required for the QImage plugin for OpenEXR images"
 )
+
+find_package(libavif 0.8.2 CONFIG)
+set_package_properties(libavif PROPERTIES
+    TYPE OPTIONAL
+    PURPOSE "Required for the QImage plugin for AVIF images"
+)
+
 add_definitions(-DQT_NO_FOREACH)
 # 050d00 (5.13) triggers a BIC in qimageiohandler.h, in Qt 5.13, so do not enable that until we can require 5.14
 # https://codereview.qt-project.org/c/qt/qtbase/+/279215
-add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0x050c00)
-add_definitions(-DKF_DISABLE_DEPRECATED_BEFORE_AND_AT=0x054900)
+add_definitions(-DQT_DISABLE_DEPRECATED_BEFORE=0x050e00)
+add_definitions(-DKF_DISABLE_DEPRECATED_BEFORE_AND_AT=0x054B00)
 add_subdirectory(src)
 if (BUILD_TESTING)
     add_subdirectory(autotests)

README.md

@@ -13,6 +13,7 @@ image formats.
 
 The following image formats have read-only support:
 
+- Animated Windows cursors (ani)
 - Gimp (xcf)
 - OpenEXR (exr)
 - Photoshop documents (psd)
@@ -20,6 +21,7 @@ The following image formats have read-only support:
 
 The following image formats have read and write support:
 
+- AV1 Image File Format (AVIF)
 - Encapsulated PostScript (eps)
 - Personal Computer Exchange (pcx)
 - SGI images (rgb, rgba, sgi, bw)

autotests/CMakeLists.txt

@@ -70,6 +70,12 @@ if (KF5Archive_FOUND)
     )
 endif()
 
+if (TARGET avif)
+    kimageformats_read_tests(
+        avif
+    )
+endif()
+
 # Allow some fuzziness when reading this formats, to allow for
 # rounding errors (eg: in alpha blending).
 kimageformats_read_tests(FUZZ 1
@@ -110,3 +116,8 @@ add_executable(pictest pictest.cpp)
 target_link_libraries(pictest Qt5::Gui Qt5::Test)
 ecm_mark_as_test(pictest)
 add_test(NAME kimageformats-pic COMMAND pictest)
+
+add_executable(anitest anitest.cpp)
+target_link_libraries(anitest Qt5::Gui Qt5::Test)
+ecm_mark_as_test(anitest)
+add_test(NAME kimageformats-ani COMMAND anitest)

autotests/anitest.cpp

@@ -0,0 +1,119 @@
+/*
+    SPDX-FileCopyrightText: 2020 Kai Uwe Broulik <kde@broulik.de>
+
+    SPDX-License-Identifier: LGPL-2.1-only OR LGPL-3.0-only OR LicenseRef-KDE-Accepted-LGPL
+*/
+
+#include <QImage>
+#include <QImageReader>
+#include <QTest>
+
+static bool imgEquals(const QImage &im1, const QImage &im2)
+{
+    const int height = im1.height();
+    const int width = im1.width();
+    for (int i = 0; i < height; ++i) {
+        const auto *line1 = reinterpret_cast<const quint8 *>(im1.scanLine(i));
+        const auto *line2 = reinterpret_cast<const quint8 *>(im2.scanLine(i));
+        for (int j = 0; j < width; ++j) {
+            if (line1[j] - line2[j] != 0) {
+                return false;
+            }
+        }
+    }
+    return true;
+}
+
+class AniTests : public QObject
+{
+    Q_OBJECT
+
+private Q_SLOTS:
+    void initTestCase()
+    {
+        QCoreApplication::addLibraryPath(QStringLiteral(PLUGIN_DIR));
+    }
+
+    void testReadMetadata()
+    {
+        QImageReader reader(QFINDTESTDATA("ani/test.ani"));
+
+        QVERIFY(reader.canRead());
+
+        QCOMPARE(reader.imageCount(), 4);
+
+        QCOMPARE(reader.size(), QSize(32, 32));
+
+        QCOMPARE(reader.text(QStringLiteral("Title")), QStringLiteral("ANI Test"));
+        QCOMPARE(reader.text(QStringLiteral("Author")), QStringLiteral("KDE Community"));
+    }
+
+    void textRead()
+    {
+        QImageReader reader(QFINDTESTDATA("ani/test.ani"));
+        QVERIFY(reader.canRead());
+        QCOMPARE(reader.currentImageNumber(), 0);
+
+        QImage aniFrame;
+        QVERIFY(reader.read(&aniFrame));
+
+        QImage img1(QFINDTESTDATA("ani/test_1.png"));
+        img1.convertTo(aniFrame.format());
+
+        QVERIFY(imgEquals(aniFrame, img1));
+
+        QCOMPARE(reader.nextImageDelay(), 166); // 10 "jiffies"
+
+        QVERIFY(reader.canRead());
+        // that read() above should have advanced us to the next frame
+        QCOMPARE(reader.currentImageNumber(), 1);
+
+        QVERIFY(reader.read(&aniFrame));
+        QImage img2(QFINDTESTDATA("ani/test_2.png"));
+        img2.convertTo(aniFrame.format());
+
+        QVERIFY(imgEquals(aniFrame, img2));
+
+        // The "middle" frame has a longer delay than the others
+        QCOMPARE(reader.nextImageDelay(), 333); // 20 "jiffies"
+
+        QVERIFY(reader.canRead());
+        QCOMPARE(reader.currentImageNumber(), 2);
+
+        QVERIFY(reader.read(&aniFrame));
+        QImage img3(QFINDTESTDATA("ani/test_3.png"));
+        img3.convertTo(aniFrame.format());
+
+        QVERIFY(imgEquals(aniFrame, img3));
+
+        QCOMPARE(reader.nextImageDelay(), 166);
+
+        QVERIFY(reader.canRead());
+        QCOMPARE(reader.currentImageNumber(), 3);
+
+        QVERIFY(reader.read(&aniFrame));
+        // custom sequence in the ANI file should get us back to img2
+        QVERIFY(imgEquals(aniFrame, img2));
+
+        QCOMPARE(reader.nextImageDelay(), 166);
+
+        // We should have reached the end now
+        QVERIFY(!reader.canRead());
+        QVERIFY(!reader.read(&aniFrame));
+
+        // Jump back to the start
+        QVERIFY(reader.jumpToImage(0));
+
+        QVERIFY(reader.canRead());
+        QCOMPARE(reader.currentImageNumber(), 0);
+
+        QCOMPARE(reader.nextImageDelay(), 166);
+
+        QVERIFY(reader.read(&aniFrame));
+        QVERIFY(imgEquals(aniFrame, img1));
+    }
+};
+
+QTEST_MAIN(AniTests)
+
+#include "anitest.moc"

autotests/readtest.cpp

@@ -36,14 +36,17 @@ static void writeImageData(const char *name, const QString &filename, const QIma
     }
 }
 
-// allow each byte to be different by up to 1, to allow for rounding errors
+template<class Trait>
 static bool fuzzyeq(const QImage &im1, const QImage &im2, uchar fuzziness)
 {
+    Q_ASSERT(im1.format() == im2.format());
+    Q_ASSERT(im1.depth() == 24 || im1.depth() == 32 || im1.depth() == 64);
+
     const int height = im1.height();
     const int width = im1.width();
     for (int i = 0; i < height; ++i) {
-        const uchar *line1 = im1.scanLine(i);
-        const uchar *line2 = im2.scanLine(i);
+        const Trait *line1 = reinterpret_cast<const Trait*>(im1.scanLine(i));
+        const Trait *line2 = reinterpret_cast<const Trait*>(im2.scanLine(i));
         for (int j = 0; j < width; ++j) {
             if (line1[j] > line2[j]) {
                 if (line1[j] - line2[j] > fuzziness)
@@ -57,6 +60,30 @@ static bool fuzzyeq(const QImage &im1, const QImage &im2, uchar fuzziness)
     return true;
 }
 
+// allow each byte to be different by up to 1, to allow for rounding errors
+static bool fuzzyeq(const QImage &im1, const QImage &im2, uchar fuzziness)
+{
+    return (im1.depth() == 64) ? fuzzyeq<quint16>(im1, im2, fuzziness)
+                               : fuzzyeq<quint8>(im1, im2, fuzziness);
+}
+
+// Returns the original format if we support, or returns
+// format which we preferred to use for `fuzzyeq()`.
+// We do only support formats with 8-bits/16-bits pre pixel.
+// If that changed, don't forget to update `fuzzyeq()` too
+static QImage::Format preferredFormat(QImage::Format fmt)
+{
+    switch (fmt) {
+    case QImage::Format_RGB32:
+    case QImage::Format_ARGB32:
+    case QImage::Format_RGBX64:
+    case QImage::Format_RGBA64:
+        return fmt;
+    default:
+        return QImage::Format_ARGB32;
+    }
+}
+
 int main(int argc, char ** argv)
 {
     QCoreApplication app(argc, argv);
@@ -168,19 +195,23 @@ int main(int argc, char ** argv)
                 << expImage.height() << "\n";
             ++failed;
         } else {
-            if (inputImage.format() != QImage::Format_ARGB32) {
+            QImage::Format inputFormat = preferredFormat(inputImage.format());
+            QImage::Format expFormat = preferredFormat(expImage.format());
+            QImage::Format cmpFormat = inputFormat == expFormat ? inputFormat : QImage::Format_ARGB32;
+
+            if (inputImage.format() != cmpFormat) {
                 QTextStream(stdout) << "INFO : " << fi.fileName()
                     << ": converting " << fi.fileName()
                     << " from " << formatToString(inputImage.format())
-                    << " to ARGB32\n";
-                inputImage = inputImage.convertToFormat(QImage::Format_ARGB32);
+                    << " to " << formatToString(cmpFormat) << '\n';
+                inputImage = inputImage.convertToFormat(cmpFormat);
             }
-            if (expImage.format() != QImage::Format_ARGB32) {
+            if (expImage.format() != cmpFormat) {
                 QTextStream(stdout) << "INFO : " << fi.fileName()
                     << ": converting " << expfilename
                     << " from " << formatToString(expImage.format())
-                    << " to ARGB32\n";
-                expImage = expImage.convertToFormat(QImage::Format_ARGB32);
+                    << " to " << formatToString(cmpFormat) << '\n';
+                expImage = expImage.convertToFormat(cmpFormat);
             }
             if (fuzzyeq(inputImage, expImage, fuzziness)) {
                 QTextStream(stdout) << "PASS : " << fi.fileName() << "\n";

src/imageformats/CMakeLists.txt

@@ -24,6 +24,19 @@ endfunction()
 
 ##################################
 
+kimageformats_add_plugin(kimg_ani JSON "ani.json" SOURCES ani.cpp)
+install(FILES ani.desktop DESTINATION ${KDE_INSTALL_KSERVICES5DIR}/qimageioplugins/)
+
+##################################
+
+if (TARGET avif)
+    kimageformats_add_plugin(kimg_avif JSON "avif.json" SOURCES "avif.cpp")
+    target_link_libraries(kimg_avif "avif")
+    install(FILES avif.desktop DESTINATION ${KDE_INSTALL_KSERVICES5DIR}/qimageioplugins/)
+endif()
+
+##################################
+
 install(FILES dds-qt.desktop RENAME dds.desktop DESTINATION ${KDE_INSTALL_KSERVICES5DIR}/qimageioplugins/)
 
 ##################################

src/imageformats/ani.cpp

@@ -0,0 +1,571 @@
+/*
+    SPDX-FileCopyrightText: 2020 Kai Uwe Broulik <kde@broulik.de>
+
+    SPDX-License-Identifier: LGPL-2.0-or-later
+*/
+
+#include "ani_p.h"
+
+#include <QDebug>
+#include <QImage>
+#include <QScopeGuard>
+#include <QtEndian>
+#include <QVariant>
+
+namespace
+{
+
+struct ChunkHeader {
+    char magic[4];
+    quint32_le size;
+};
+
+struct AniHeader {
+    quint32_le cbSize;
+    quint32_le nFrames; // number of actual frames in the file
+    quint32_le nSteps; // number of logical images
+    quint32_le iWidth;
+    quint32_le iHeight;
+    quint32_le iBitCount;
+    quint32_le nPlanes;
+    quint32_le iDispRate;
+    quint32_le bfAttributes; // attributes (0 = bitmap images, 1 = ico/cur, 3 = "seq" block available)
+};
+
+struct CurHeader {
+   quint16_le wReserved; // always 0
+   quint16_le wResID; // always 2
+   quint16_le wNumImages;
+};
+
+struct CursorDirEntry {
+    quint8 bWidth;
+    quint8 bHeight;
+    quint8 bColorCount;
+    quint8 bReserved;	// always 0
+    quint16_le wHotspotX;
+    quint16_le wHotspotY;
+    quint32_le dwBytesInImage;
+    quint32_le dwImageOffset;
+};
+
+} // namespace
+
+ANIHandler::ANIHandler() = default;
+
+bool ANIHandler::canRead() const
+{
+    if (canRead(device())) {
+        setFormat("ani");
+        return true;
+    }
+
+    // Check if there's another frame coming
+    const QByteArray nextFrame = device()->peek(sizeof(ChunkHeader));
+    if (nextFrame.size() == sizeof(ChunkHeader)) {
+        const auto *header = reinterpret_cast<const ChunkHeader *>(nextFrame.data());
+        if (qstrncmp(header->magic, "icon", sizeof(header->magic)) == 0
+                && header->size > 0) {
+            setFormat("ani");
+            return true;
+        }
+    }
+
+    return false;
+}
+
+bool ANIHandler::read(QImage *outImage)
+{
+    if (!ensureScanned()) {
+        return false;
+    }
+
+    if (device()->pos() < m_firstFrameOffset) {
+        device()->seek(m_firstFrameOffset);
+    }
+
+    const QByteArray frameType = device()->read(4);
+    if (frameType != "icon") {
+        return false;
+    }
+
+    const QByteArray frameSizeData = device()->read(sizeof(quint32_le));
+    if (frameSizeData.count() != sizeof(quint32_le)) {
+        return false;
+    }
+
+    const auto frameSize = *(reinterpret_cast<const quint32_le *>(frameSizeData.data()));
+    if (!frameSize) {
+        return false;
+    }
+
+    const QByteArray frameData = device()->read(frameSize);
+
+    const bool ok = outImage->loadFromData(frameData, "cur");
+
+    ++m_currentImageNumber;
+
+    // When we have a custom image sequence, seek to before the frame that would follow
+    if (!m_imageSequence.isEmpty()) {
+        if (m_currentImageNumber < m_imageSequence.count()) {
+            const int nextFrame = m_imageSequence.at(m_currentImageNumber);
+            if (nextFrame < 0 || nextFrame >= m_frameOffsets.count()) {
+                return false;
+            }
+            const auto nextOffset = m_frameOffsets.at(nextFrame);
+            device()->seek(nextOffset);
+        } else if (m_currentImageNumber == m_imageSequence.count()) {
+            const auto endOffset = m_frameOffsets.last();
+            if (device()->pos() != endOffset) {
+                device()->seek(endOffset);
+            }
+        }
+    }
+
+    return ok;
+}
+
+int ANIHandler::currentImageNumber() const
+{
+    if (!ensureScanned()) {
+        return 0;
+    }
+    return m_currentImageNumber;
+}
+
+int ANIHandler::imageCount() const
+{
+    if (!ensureScanned()) {
+        return 0;
+    }
+    return m_imageCount;
+}
+
+bool ANIHandler::jumpToImage(int imageNumber)
+{
+    if (!ensureScanned()) {
+        return false;
+    }
+
+    if (imageNumber < 0) {
+        return false;
+    }
+
+    if (imageNumber == m_currentImageNumber) {
+        return true;
+    }
+
+    // If we have a custom image sequence we have a index of frames we can jump to
+    if (!m_imageSequence.isEmpty()) {
+        if (imageNumber >= m_imageSequence.count()) {
+            return false;
+        }
+
+        const int targetFrame = m_imageSequence.at(imageNumber);
+
+        const auto targetOffset = m_frameOffsets.value(targetFrame, -1);
+
+        if (device()->seek(targetOffset)) {
+            m_currentImageNumber = imageNumber;
+            return true;
+        }
+
+        return false;
+    }
+
+    if (imageNumber >= m_frameCount) {
+        return false;
+    }
+
+    // otherwise we need to jump from frame to frame
+    const auto oldPos = device()->pos();
+
+    if (imageNumber < m_currentImageNumber) {
+        // start from the beginning
+        if (!device()->seek(m_firstFrameOffset)) {
+            return false;
+        }
+    }
+
+    while (m_currentImageNumber < imageNumber) {
+        if (!jumpToNextImage()) {
+            device()->seek(oldPos);
+            return false;
+        }
+    }
+
+    m_currentImageNumber = imageNumber;
+    return true;
+}
+
+bool ANIHandler::jumpToNextImage()
+{
+    if (!ensureScanned()) {
+        return false;
+    }
+
+    // If we have a custom image sequence we have a index of frames we can jump to
+    // Delegate to jumpToImage
+    if (!m_imageSequence.isEmpty()) {
+        return jumpToImage(m_currentImageNumber + 1);
+    }
+
+    if (device()->pos() < m_firstFrameOffset) {
+        if (!device()->seek(m_firstFrameOffset)) {
+            return false;
+        }
+    }
+
+    const QByteArray nextFrame = device()->peek(sizeof(ChunkHeader));
+    if (nextFrame.size() != sizeof(ChunkHeader)) {
+        return false;
+    }
+
+    const auto *header = reinterpret_cast<const ChunkHeader *>(nextFrame.data());
+    if (qstrncmp(header->magic, "icon", sizeof(header->magic)) != 0) {
+        return false;
+    }
+
+    const qint64 seekBy = sizeof(ChunkHeader) + header->size;
+
+    if (!device()->seek(device()->pos() + seekBy)) {
+        return false;
+    }
+
+    ++m_currentImageNumber;
+    return true;
+}
+
+int ANIHandler::loopCount() const
+{
+    if (!ensureScanned()) {
+        return 0;
+    }
+    return -1;
+}
+
+int ANIHandler::nextImageDelay() const
+{
+    if (!ensureScanned()) {
+        return 0;
+    }
+
+    int rate = m_displayRate;
+
+    if (!m_displayRates.isEmpty()) {
+        int previousImage = m_currentImageNumber - 1;
+        if (previousImage < 0) {
+            previousImage = m_displayRates.count() - 1;
+        }
+        rate = m_displayRates.at(previousImage);
+    }
+
+    return rate * 1000 / 60;
+}
+
+bool ANIHandler::supportsOption(ImageOption option) const
+{
+    return option == Size || option == Name || option == Description || option == Animation;
+}
+
+QVariant ANIHandler::option(ImageOption option) const
+{
+    if (!supportsOption(option) || !ensureScanned()) {
+        return QVariant();
+    }
+
+    switch (option) {
+    case QImageIOHandler::Size:
+        return m_size;
+    // TODO QImageIOHandler::Format
+    // but both iBitCount in AniHeader and bColorCount are just zero most of the time
+    // so one would probably need to traverse even further down into IcoHeader and IconDirEntry...
+    // but Qt's ICO/CUR handler always seems to give us a ARB
+    case QImageIOHandler::Name:
+        return m_name;
+    case QImageIOHandler::Description: {
+        QString description;
+        if (!m_name.isEmpty()) {
+            description += QStringLiteral("Title: %1\n\n").arg(m_name);
+        }
+        if (!m_artist.isEmpty()) {
+            description += QStringLiteral("Author: %1\n\n").arg(m_artist);
+        }
+        return description;
+    }
+
+    case QImageIOHandler::Animation:
+        return true;
+    default:
+        break;
+    }
+
+    return QVariant();
+}
+
+bool ANIHandler::ensureScanned() const
+{
+    if (m_scanned) {
+        return true;
+    }
+
+    if (device()->isSequential()) {
+        return false;
+    }
+
+    auto *mutableThis = const_cast<ANIHandler *>(this);
+
+    const auto oldPos = device()->pos();
+    auto cleanup = qScopeGuard([this, oldPos] {
+        device()->seek(oldPos);
+    });
+
+    device()->seek(0);
+
+    const QByteArray riffIntro = device()->read(4);
+    if (riffIntro != "RIFF") {
+        return false;
+    }
+
+    const auto riffSizeData = device()->read(sizeof(quint32_le));
+    if (riffSizeData.size() != sizeof(quint32_le)) {
+        return false;
+    }
+    const auto riffSize = *(reinterpret_cast<const quint32_le *>(riffSizeData.data()));
+    // TODO do a basic sanity check if the size is enough to hold some metadata and a frame?
+    if (riffSize == 0) {
+        return false;
+    }
+
+    mutableThis->m_displayRates.clear();
+    mutableThis->m_imageSequence.clear();
+
+    while (device()->pos() < riffSize) {
+        const QByteArray chunkId = device()->read(4);
+        if (chunkId.length() != 4) {
+            return false;
+        }
+
+        if (chunkId == "ACON") {
+            continue;
+        }
+
+        const QByteArray chunkSizeData = device()->read(sizeof(quint32_le));
+        if (chunkSizeData.length() != sizeof(quint32_le)) {
+            return false;
+        }
+        auto chunkSize = *(reinterpret_cast<const quint32_le *>(chunkSizeData.data()));
+
+        if (chunkId == "anih") {
+            if (chunkSize != sizeof(AniHeader)) {
+                qWarning() << "anih chunk size does not match ANIHEADER size";
+                return false;
+            }
+
+            const QByteArray anihData = device()->read(sizeof(AniHeader));
+            if (anihData.size() != sizeof(AniHeader)) {
+                return false;
+            }
+
+            auto *aniHeader = reinterpret_cast<const AniHeader *>(anihData.data());
+
+            // The size in the ani header is usually 0 unfortunately,
+            // so we'll also check the first frame for its size further below
+            mutableThis->m_size = QSize(aniHeader->iWidth, aniHeader->iHeight);
+            mutableThis->m_frameCount = aniHeader->nFrames;
+            mutableThis->m_imageCount = aniHeader->nSteps;
+            mutableThis->m_displayRate = aniHeader->iDispRate;
+        } else if (chunkId == "rate" || chunkId == "seq ") {
+            const QByteArray data = device()->read(chunkSize);
+            if (static_cast<quint32_le>(data.size()) != chunkSize
+                    || data.size() % sizeof(quint32_le) != 0) {
+                return false;
+            }
+
+            // TODO should we check that the number of rate entries matches nSteps?
+            auto *dataPtr = data.data();
+            QVector<int> list;
+            for (int i = 0; i < data.count(); i += sizeof(quint32_le)) {
+                const auto entry = *(reinterpret_cast<const quint32_le *>(dataPtr + i));
+                list.append(entry);
+            }
+
+            if (chunkId == "rate") {
+                // should we check that the number of rate entries matches nSteps?
+                mutableThis->m_displayRates = list;
+            } else if (chunkId == "seq ") {
+                // Check if it's just an ascending sequence, don't bother with it then
+                bool isAscending = true;
+                for (int i = 0; i < list.count(); ++i) {
+                    if (list.at(i) != i) {
+                        isAscending = false;
+                        break;
+                    }
+                }
+
+                if (!isAscending) {
+                    mutableThis->m_imageSequence = list;
+                }
+            }
+        // IART and INAM are technically inside LIST->INFO but "INFO" is supposedly optional
+        // so just handle those two attributes wherever we encounter them
+        } else if (chunkId == "INAM" || chunkId == "IART") {
+            const QByteArray value = device()->read(chunkSize);
+
+            if (static_cast<quint32_le>(value.size()) != chunkSize) {
+                return false;
+            }
+
+            // DWORDs are aligned to even sizes
+            if (chunkSize % 2 != 0) {
+                device()->read(1);
+            }
+
+            // FIXME encoding
+            const QString stringValue = QString::fromLocal8Bit(value);
+            if (chunkId == "INAM") {
+                mutableThis->m_name = stringValue;
+            } else if (chunkId == "IART") {
+                mutableThis->m_artist = stringValue;
+            }
+        } else if (chunkId == "LIST") {
+            const QByteArray listType = device()->read(4);
+
+            if (listType == "INFO") {
+                // Technically would contain INAM and IART but we handle them anywhere above
+            } else if (listType == "fram") {
+                quint64 read = 0;
+                while (read < chunkSize) {
+                    const QByteArray chunkType = device()->read(4);
+                    read += 4;
+                    if (chunkType != "icon") {
+                        break;
+                    }
+
+                    if (!m_firstFrameOffset) {
+                        mutableThis->m_firstFrameOffset = device()->pos() - 4;
+                        mutableThis->m_currentImageNumber = 0;
+
+                        // If size in header isn't valid, use the first frame's size instead
+                        if (!m_size.isValid() || m_size.isEmpty()) {
+                            const auto oldPos = device()->pos();
+
+                            device()->read(sizeof(quint32_le));
+
+                            const QByteArray curHeaderData = device()->read(sizeof(CurHeader));
+                            const QByteArray cursorDirEntryData = device()->read(sizeof(CursorDirEntry));
+
+                            if (curHeaderData.length() == sizeof(CurHeader)
+                                    && cursorDirEntryData.length() == sizeof(CursorDirEntry)) {
+                                auto *cursorDirEntry = reinterpret_cast<const CursorDirEntry *>(cursorDirEntryData.data());
+                                mutableThis->m_size = QSize(cursorDirEntry->bWidth, cursorDirEntry->bHeight);
+                            }
+
+                            device()->seek(oldPos);
+                        }
+
+                        // If we don't have a custom image sequence we can stop scanning right here
+                        if (m_imageSequence.isEmpty()) {
+                            break;
+                        }
+                    }
+
+                    mutableThis->m_frameOffsets.append(device()->pos() - 4);
+
+                    const QByteArray frameSizeData = device()->read(sizeof(quint32_le));
+                    if (frameSizeData.size() != sizeof(quint32_le)) {
+                        return false;
+                    }
+
+                    const auto frameSize = *(reinterpret_cast<const quint32_le *>(frameSizeData.data()));
+                    device()->seek(device()->pos() + frameSize);
+
+                    read += frameSize;
+
+                    if (m_frameOffsets.count() == m_frameCount) {
+                        // Also record the end of frame data
+                        mutableThis->m_frameOffsets.append(device()->pos() - 4);
+                        break;
+                    }
+                }
+                break;
+            }
+        }
+    }
+
+    if (m_imageCount != m_frameCount && m_imageSequence.isEmpty()) {
+        qWarning("ANIHandler: 'nSteps' is not equal to 'nFrames' but no 'seq' entries were provided");
+        return false;
+    }
+
+    if (!m_imageSequence.isEmpty() && m_imageSequence.count() != m_imageCount) {
+        qWarning("ANIHandler: count of entries in 'seq' does not match 'nSteps' in anih");
+        return false;
+    }
+
+    if (!m_displayRates.isEmpty() && m_displayRates.count() != m_imageCount) {
+        qWarning("ANIHandler: count of entries in 'rate' does not match 'nSteps' in anih");
+        return false;
+    }
+
+    if (!m_frameOffsets.isEmpty() && m_frameOffsets.count() != m_frameCount + 1) {
+        qWarning("ANIHandler: number of actual frames does not match 'nFrames' in anih");
+        return false;
+    }
+
+    mutableThis->m_scanned = true;
+    return true;
+}
+
+bool ANIHandler::canRead(QIODevice *device)
+{
+    if (!device) {
+        qWarning("ANIHandler::canRead() called with no device");
+        return false;
+    }
+
+    const QByteArray riffIntro = device->peek(12);
+
+    if (riffIntro.length() != 12) {
+        return false;
+    }
+
+    if (!riffIntro.startsWith("RIFF")) {
+        return false;
+    }
+
+    // TODO sanity check chunk size?
+
+    if (riffIntro.mid(4 + 4, 4) != "ACON") {
+        return false;
+    }
+
+    return true;
+}
+
+QImageIOPlugin::Capabilities ANIPlugin::capabilities(QIODevice *device, const QByteArray &format) const
+{
+    if (format == "ani") {
+        return Capabilities(CanRead);
+    }
+    if (!format.isEmpty()) {
+        return {};
+    }
+    if (!device->isOpen()) {
+        return {};
+    }
+
+    Capabilities cap;
+    if (device->isReadable() && ANIHandler::canRead(device)) {
+        cap |= CanRead;
+    }
+    return cap;
+}
+
+QImageIOHandler *ANIPlugin::create(QIODevice *device, const QByteArray &format) const
+{
+    QImageIOHandler *handler = new ANIHandler;
+    handler->setDevice(device);
+    handler->setFormat(format);
+    return handler;
+}

src/imageformats/ani.desktop

@@ -0,0 +1,7 @@
+[Desktop Entry]
+Type=Service
+X-KDE-ServiceTypes=QImageIOPlugins
+X-KDE-ImageFormat=ani
+X-KDE-MimeType=application/x-navi-animation
+X-KDE-Read=true
+X-KDE-Write=false

src/imageformats/ani.json

@@ -0,0 +1,4 @@
+{
+    "Keys": [ "ani" ],
+    "MimeTypes": [ "application/x-navi-animation" ]
+}

src/imageformats/ani_p.h

@@ -0,0 +1,69 @@
+/*
+    SPDX-FileCopyrightText: 2020 Kai Uwe Broulik <kde@broulik.de>
+
+    SPDX-License-Identifier: LGPL-2.0-or-later
+*/
+
+#ifndef KIMG_ANI_P_H
+#define KIMG_ANI_P_H
+
+#include <QImageIOPlugin>
+#include <QSize>
+
+class ANIHandler : public QImageIOHandler
+{
+public:
+    ANIHandler();
+
+    bool canRead() const override;
+    bool read(QImage *image) override;
+
+    int currentImageNumber() const override;
+    int imageCount() const override;
+    bool jumpToImage(int imageNumber) override;
+    bool jumpToNextImage() override;
+
+    int loopCount() const override;
+    int nextImageDelay() const override;
+
+    bool supportsOption(ImageOption option) const override;
+    QVariant option(ImageOption option) const override;
+
+    static bool canRead(QIODevice *device);
+
+private:
+    bool ensureScanned() const;
+
+    bool m_scanned = false;
+
+    int m_currentImageNumber = 0;
+
+    int m_frameCount = 0; // "physical" frames
+    int m_imageCount = 0; // logical images
+    // Stores a custom sequence of images
+    QVector<int> m_imageSequence;
+    // and the corresponding offsets where they are
+    // since we can't read the image data sequentally in this case then
+    QVector<qint64> m_frameOffsets;
+    qint64 m_firstFrameOffset = 0;
+
+    int m_displayRate = 0;
+    QVector<int> m_displayRates;
+
+    QString m_name;
+    QString m_artist;
+    QSize m_size;
+
+};
+
+class ANIPlugin : public QImageIOPlugin
+{
+    Q_OBJECT
+    Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QImageIOHandlerFactoryInterface" FILE "ani.json")
+
+public:
+    Capabilities capabilities(QIODevice *device, const QByteArray &format) const override;
+    QImageIOHandler *create(QIODevice *device, const QByteArray &format = QByteArray()) const override;
+};
+
+#endif // KIMG_ANI_P_H

src/imageformats/avif.cpp

@@ -0,0 +1,946 @@
+/*
+    AV1 Image File Format (AVIF) support for QImage.
+
+    SPDX-FileCopyrightText: 2020 Daniel Novomesky <dnovomesky@gmail.com>
+
+    SPDX-License-Identifier: BSD-2-Clause
+*/
+
+#include <QtGlobal>
+#include <QThread>
+
+#include <QColorSpace>
+
+#include "avif_p.h"
+
+
+QAVIFHandler::QAVIFHandler() :
+    m_parseState(ParseAvifNotParsed),
+    m_quality(52),
+    m_container_width(0),
+    m_container_height(0),
+    m_rawAvifData(AVIF_DATA_EMPTY),
+    m_decoder(nullptr),
+    m_must_jump_to_next_image(false)
+{
+}
+
+QAVIFHandler::~QAVIFHandler()
+{
+    if (m_decoder) {
+        avifDecoderDestroy(m_decoder);
+    }
+}
+
+bool QAVIFHandler::canRead() const
+{
+    if (m_parseState == ParseAvifNotParsed && !canRead(device())) {
+        return false;
+    }
+
+    if (m_parseState != ParseAvifError) {
+        setFormat("avif");
+        return true;
+    }
+    return false;
+}
+
+bool QAVIFHandler::canRead(QIODevice *device)
+{
+    if (!device) {
+        return false;
+    }
+    QByteArray header = device->peek(144);
+    if (header.size() < 12) {
+        return false;
+    }
+
+    avifROData input;
+    input.data = (const uint8_t *) header.constData();
+    input.size = header.size();
+
+    if (avifPeekCompatibleFileType(&input)) {
+        return true;
+    }
+    return false;
+}
+
+bool QAVIFHandler::ensureParsed() const
+{
+    if (m_parseState == ParseAvifSuccess) {
+        return true;
+    }
+    if (m_parseState == ParseAvifError) {
+        return false;
+    }
+
+    QAVIFHandler *that = const_cast<QAVIFHandler *>(this);
+
+    return that->ensureDecoder();
+}
+
+bool QAVIFHandler::ensureDecoder()
+{
+    if (m_decoder) {
+        return true;
+    }
+
+    m_rawData = device()->readAll();
+
+    m_rawAvifData.data = (const uint8_t *) m_rawData.constData();
+    m_rawAvifData.size = m_rawData.size();
+
+    if (avifPeekCompatibleFileType(&m_rawAvifData) == AVIF_FALSE) {
+        m_parseState = ParseAvifError;
+        return false;
+    }
+
+
+    m_decoder = avifDecoderCreate();
+
+    avifResult decodeResult;
+
+    decodeResult = avifDecoderSetIOMemory(m_decoder, m_rawAvifData.data, m_rawAvifData.size);
+    if (decodeResult != AVIF_RESULT_OK) {
+        qWarning("ERROR: avifDecoderSetIOMemory failed: %s\n", avifResultToString(decodeResult));
+
+        avifDecoderDestroy(m_decoder);
+        m_decoder = nullptr;
+        m_parseState = ParseAvifError;
+        return false;
+    }
+
+    decodeResult = avifDecoderParse(m_decoder);
+    if (decodeResult != AVIF_RESULT_OK) {
+        qWarning("ERROR: Failed to parse input: %s\n", avifResultToString(decodeResult));
+
+        avifDecoderDestroy(m_decoder);
+        m_decoder = nullptr;
+        m_parseState = ParseAvifError;
+        return false;
+    }
+
+    decodeResult = avifDecoderNextImage(m_decoder);
+
+    if (decodeResult == AVIF_RESULT_OK) {
+
+        m_container_width = m_decoder->image->width;
+        m_container_height = m_decoder->image->height;
+
+        if ((m_container_width > 32768) || (m_container_height > 32768)) {
+            qWarning("AVIF image (%dx%d) is too large!", m_container_width, m_container_height);
+            m_parseState = ParseAvifError;
+            return false;
+        }
+
+        if ((m_container_width == 0) || (m_container_height == 0)) {
+            qWarning("Empty image, nothing to decode");
+            m_parseState = ParseAvifError;
+            return false;
+        }
+
+        m_parseState = ParseAvifSuccess;
+        if (decode_one_frame()) {
+            return true;
+        } else {
+            m_parseState = ParseAvifError;
+            return false;
+        }
+    } else {
+        qWarning("ERROR: Failed to decode image: %s\n", avifResultToString(decodeResult));
+    }
+
+    avifDecoderDestroy(m_decoder);
+    m_decoder = nullptr;
+    m_parseState = ParseAvifError;
+    return false;
+}
+
+bool QAVIFHandler::decode_one_frame()
+{
+    if (!ensureParsed()) {
+        return false;
+    }
+
+    bool loadalpha;
+
+    if (m_decoder->image->alphaPlane) {
+        loadalpha = true;
+    } else {
+        loadalpha = false;
+    }
+
+    QImage::Format resultformat;
+
+    if (m_decoder->image->depth > 8) {
+        if (loadalpha) {
+            resultformat = QImage::Format_RGBA64;
+        } else {
+            resultformat = QImage::Format_RGBX64;
+        }
+    } else {
+        if (loadalpha) {
+            resultformat = QImage::Format_RGBA8888;
+        } else {
+            resultformat = QImage::Format_RGB888;
+        }
+    }
+    QImage result(m_decoder->image->width, m_decoder->image->height, resultformat);
+
+    if (result.isNull()) {
+        qWarning("Memory cannot be allocated");
+        return false;
+    }
+
+    if (m_decoder->image->icc.data && (m_decoder->image->icc.size > 0)) {
+        result.setColorSpace(QColorSpace::fromIccProfile(QByteArray::fromRawData((const char *) m_decoder->image->icc.data, (int) m_decoder->image->icc.size)));
+        if (! result.colorSpace().isValid()) {
+            qWarning("Invalid QColorSpace created from ICC!\n");
+        }
+    } else {
+        float prim[8]; // outPrimaries: rX, rY, gX, gY, bX, bY, wX, wY
+        avifColorPrimariesGetValues(m_decoder->image->colorPrimaries, prim);
+
+        QPointF redPoint(prim[0], prim[1]);
+        QPointF greenPoint(prim[2], prim[3]);
+        QPointF bluePoint(prim[4], prim[5]);
+        QPointF whitePoint(prim[6], prim[7]);
+
+
+        QColorSpace::TransferFunction q_trc = QColorSpace::TransferFunction::Custom;
+        float q_trc_gamma = 0.0f;
+
+        switch (m_decoder->image->transferCharacteristics) {
+        /* AVIF_TRANSFER_CHARACTERISTICS_BT470M */
+        case 4:
+            q_trc = QColorSpace::TransferFunction::Gamma;
+            q_trc_gamma = 2.2f;
+            break;
+        /* AVIF_TRANSFER_CHARACTERISTICS_BT470BG */
+        case 5:
+            q_trc = QColorSpace::TransferFunction::Gamma;
+            q_trc_gamma = 2.8f;
+            break;
+        /* AVIF_TRANSFER_CHARACTERISTICS_LINEAR */
+        case 8:
+            q_trc = QColorSpace::TransferFunction::Linear;
+            break;
+        /* AVIF_TRANSFER_CHARACTERISTICS_SRGB */
+        case 0:
+        case 2: /* AVIF_TRANSFER_CHARACTERISTICS_UNSPECIFIED */
+        case 13:
+            q_trc =  QColorSpace::TransferFunction::SRgb;
+            break;
+        default:
+            qWarning("CICP colorPrimaries: %d, transferCharacteristics: %d\nThe colorspace is unsupported by this plug-in yet.",
+                     m_decoder->image->colorPrimaries, m_decoder->image->transferCharacteristics);
+            q_trc = QColorSpace::TransferFunction::SRgb;
+            break;
+        }
+
+        if (q_trc != QColorSpace::TransferFunction::Custom) {   //we create new colorspace using Qt
+            switch (m_decoder->image->colorPrimaries) {
+            /* AVIF_COLOR_PRIMARIES_BT709 */
+            case 0:
+            case 1:
+            case 2: /* AVIF_COLOR_PRIMARIES_UNSPECIFIED */
+                result.setColorSpace(QColorSpace(QColorSpace::Primaries::SRgb, q_trc, q_trc_gamma));
+                break;
+            /* AVIF_COLOR_PRIMARIES_SMPTE432 */
+            case 12:
+                result.setColorSpace(QColorSpace(QColorSpace::Primaries::DciP3D65, q_trc, q_trc_gamma));
+                break;
+            default:
+                result.setColorSpace(QColorSpace(whitePoint, redPoint, greenPoint, bluePoint, q_trc, q_trc_gamma));
+                break;
+            }
+        }
+
+        if (! result.colorSpace().isValid()) {
+            qWarning("Invalid QColorSpace created from NCLX/CICP!\n");
+        }
+    }
+
+    avifRGBImage rgb;
+    avifRGBImageSetDefaults(&rgb, m_decoder->image);
+
+    if (m_decoder->image->depth > 8) {
+        rgb.depth = 16;
+        rgb.format = AVIF_RGB_FORMAT_RGBA;
+
+        if (!loadalpha) {
+            rgb.ignoreAlpha = AVIF_TRUE;
+            result.fill(Qt::black);
+            if (m_decoder->image->yuvFormat == AVIF_PIXEL_FORMAT_YUV400) {
+                resultformat = QImage::Format_Grayscale16;
+            }
+        }
+    } else {
+        rgb.depth = 8;
+        if (loadalpha) {
+            rgb.format = AVIF_RGB_FORMAT_RGBA;
+            resultformat = QImage::Format_ARGB32;
+        } else {
+            rgb.format = AVIF_RGB_FORMAT_RGB;
+
+            if (m_decoder->image->yuvFormat == AVIF_PIXEL_FORMAT_YUV400) {
+                resultformat = QImage::Format_Grayscale8;
+            } else {
+                resultformat = QImage::Format_RGB32;
+            }
+        }
+    }
+
+    rgb.rowBytes = result.bytesPerLine();
+    rgb.pixels = result.bits();
+
+    avifResult res = avifImageYUVToRGB(m_decoder->image, &rgb);
+    if (res != AVIF_RESULT_OK) {
+        qWarning("ERROR in avifImageYUVToRGB: %s\n", avifResultToString(res));
+        return false;
+    }
+
+    if (m_decoder->image->transformFlags & AVIF_TRANSFORM_CLAP) {
+        if ((m_decoder->image->clap.widthD > 0) && (m_decoder->image->clap.heightD > 0) &&
+                (m_decoder->image->clap.horizOffD > 0) && (m_decoder->image->clap.vertOffD > 0)) {
+            int  new_width, new_height, offx, offy;
+
+            new_width = (int)((double)(m_decoder->image->clap.widthN)  / (m_decoder->image->clap.widthD) + 0.5);
+            if (new_width > result.width()) {
+                new_width = result.width();
+            }
+
+            new_height = (int)((double)(m_decoder->image->clap.heightN) / (m_decoder->image->clap.heightD) + 0.5);
+            if (new_height > result.height()) {
+                new_height = result.height();
+            }
+
+            if (new_width > 0 && new_height > 0) {
+
+                offx = ((double)((int32_t) m_decoder->image->clap.horizOffN)) / (m_decoder->image->clap.horizOffD) +
+                       (result.width() - new_width) / 2.0 + 0.5;
+                if (offx < 0) {
+                    offx = 0;
+                } else if (offx > (result.width() - new_width)) {
+                    offx = result.width() - new_width;
+                }
+
+                offy = ((double)((int32_t) m_decoder->image->clap.vertOffN)) / (m_decoder->image->clap.vertOffD) +
+                       (result.height() - new_height) / 2.0 + 0.5;
+                if (offy < 0) {
+                    offy = 0;
+                } else if (offy > (result.height() - new_height)) {
+                    offy = result.height() - new_height;
+                }
+
+                result = result.copy(offx, offy, new_width, new_height);
+            }
+        }
+
+        else { //Zero values, we need to avoid 0 divide.
+            qWarning("ERROR: Wrong values in avifCleanApertureBox\n");
+        }
+    }
+
+    if (m_decoder->image->transformFlags & AVIF_TRANSFORM_IROT) {
+        QTransform transform;
+        switch (m_decoder->image->irot.angle) {
+        case 1:
+            transform.rotate(-90);
+            result = result.transformed(transform);
+            break;
+        case 2:
+            transform.rotate(180);
+            result = result.transformed(transform);
+            break;
+        case 3:
+            transform.rotate(90);
+            result = result.transformed(transform);
+            break;
+        }
+    }
+
+    if (m_decoder->image->transformFlags & AVIF_TRANSFORM_IMIR) {
+        switch (m_decoder->image->imir.axis) {
+        case 0: //vertical
+            result = result.mirrored(false, true);
+            break;
+        case 1: //horizontal
+            result = result.mirrored(true, false);
+            break;
+        }
+    }
+
+    if (resultformat == result.format()) {
+        m_current_image = result;
+    } else {
+        m_current_image = result.convertToFormat(resultformat);
+    }
+
+    m_must_jump_to_next_image = false;
+    return true;
+}
+
+bool QAVIFHandler::read(QImage *image)
+{
+    if (!ensureParsed()) {
+        return false;
+    }
+
+    if (m_must_jump_to_next_image) {
+        jumpToNextImage();
+    }
+
+    *image = m_current_image;
+    if (imageCount() >= 2) {
+        m_must_jump_to_next_image = true;
+    }
+    return true;
+}
+
+bool QAVIFHandler::write(const QImage &image)
+{
+    if (image.format() == QImage::Format_Invalid) {
+        qWarning("No image data to save");
+        return false;
+    }
+
+    if ((image.width() > 32768) || (image.height() > 32768)) {
+        qWarning("Image is too large");
+        return false;
+    }
+
+    int maxQuantizer = AVIF_QUANTIZER_WORST_QUALITY * (100 - qBound(0, m_quality, 100)) / 100;
+    int minQuantizer = 0;
+    int maxQuantizerAlpha = 0;
+    avifResult res;
+
+    bool save_grayscale; //true - monochrome, false - colors
+    int save_depth; //8 or 10bit per channel
+    QImage::Format tmpformat; //format for temporary image
+
+    avifImage *avif = nullptr;
+
+    //grayscale detection
+    switch (image.format()) {
+    case QImage::Format_Mono:
+    case QImage::Format_MonoLSB:
+    case QImage::Format_Grayscale8:
+    case QImage::Format_Grayscale16:
+        save_grayscale = true;
+        break;
+    case QImage::Format_Indexed8:
+        save_grayscale = image.isGrayscale();
+        break;
+    default:
+        save_grayscale = false;
+        break;
+    }
+
+    //depth detection
+    switch (image.format()) {
+    case QImage::Format_BGR30:
+    case QImage::Format_A2BGR30_Premultiplied:
+    case QImage::Format_RGB30:
+    case QImage::Format_A2RGB30_Premultiplied:
+    case QImage::Format_Grayscale16:
+    case QImage::Format_RGBX64:
+    case QImage::Format_RGBA64:
+    case QImage::Format_RGBA64_Premultiplied:
+        save_depth = 10;
+        break;
+    default:
+        if (image.depth() > 32) {
+            save_depth = 10;
+        } else {
+            save_depth = 8;
+        }
+        break;
+    }
+
+    //quality settings
+    if (maxQuantizer > 20) {
+        minQuantizer = maxQuantizer - 20;
+        if (maxQuantizer > 40) { //we decrease quality of alpha channel here
+            maxQuantizerAlpha = maxQuantizer - 40;
+        }
+    }
+
+    if (save_grayscale && !image.hasAlphaChannel()) { //we are going to save grayscale image without alpha channel
+        if (save_depth > 8) {
+            tmpformat = QImage::Format_Grayscale16;
+        } else {
+            tmpformat = QImage::Format_Grayscale8;
+        }
+        QImage tmpgrayimage = image.convertToFormat(tmpformat);
+
+        avif = avifImageCreate(tmpgrayimage.width(), tmpgrayimage.height(), save_depth, AVIF_PIXEL_FORMAT_YUV400);
+        avifImageAllocatePlanes(avif, AVIF_PLANES_YUV);
+
+        if (tmpgrayimage.colorSpace().isValid()) {
+            avif->colorPrimaries = (avifColorPrimaries)1;
+            avif->matrixCoefficients = (avifMatrixCoefficients)1;
+
+            switch (tmpgrayimage.colorSpace().transferFunction()) {
+            case QColorSpace::TransferFunction::Linear:
+                /* AVIF_TRANSFER_CHARACTERISTICS_LINEAR */
+                avif->transferCharacteristics = (avifTransferCharacteristics)8;
+                break;
+            case QColorSpace::TransferFunction::SRgb:
+                /* AVIF_TRANSFER_CHARACTERISTICS_SRGB */
+                avif->transferCharacteristics = (avifTransferCharacteristics)13;
+                break;
+            default:
+                /* AVIF_TRANSFER_CHARACTERISTICS_UNSPECIFIED */
+                break;
+            }
+
+        }
+
+        if (save_depth > 8) { // QImage::Format_Grayscale16
+            for (int y = 0; y < tmpgrayimage.height(); y++) {
+                const uint16_t *src16bit = reinterpret_cast<const uint16_t *>(tmpgrayimage.constScanLine(y));
+                uint16_t *dest16bit = reinterpret_cast<uint16_t *>(avif->yuvPlanes[0] + y * avif->yuvRowBytes[0]);
+                for (int x = 0; x < tmpgrayimage.width(); x++) {
+                    int tmp_pixelval = (int)(((float)(*src16bit) / 65535.0f) * 1023.0f + 0.5f); //downgrade to 10 bits
+                    *dest16bit = qBound(0, tmp_pixelval, 1023);
+                    dest16bit++;
+                    src16bit++;
+                }
+            }
+        } else { // QImage::Format_Grayscale8
+            for (int y = 0; y < tmpgrayimage.height(); y++) {
+                const uchar *src8bit = tmpgrayimage.constScanLine(y);
+                uint8_t *dest8bit = avif->yuvPlanes[0] + y * avif->yuvRowBytes[0];
+                for (int x = 0; x < tmpgrayimage.width(); x++) {
+                    *dest8bit = *src8bit;
+                    dest8bit++;
+                    src8bit++;
+                }
+            }
+        }
+
+    } else { //we are going to save color image
+        if (save_depth > 8) {
+            if (image.hasAlphaChannel()) {
+                tmpformat = QImage::Format_RGBA64;
+            } else {
+                tmpformat = QImage::Format_RGBX64;
+            }
+        } else { //8bit depth
+            if (image.hasAlphaChannel()) {
+                tmpformat = QImage::Format_RGBA8888;
+            } else {
+                tmpformat = QImage::Format_RGB888;
+            }
+        }
+
+        QImage tmpcolorimage = image.convertToFormat(tmpformat);
+
+        avifPixelFormat pixel_format = AVIF_PIXEL_FORMAT_YUV420;
+        if (maxQuantizer < 20) {
+            if (maxQuantizer < 10) {
+                pixel_format = AVIF_PIXEL_FORMAT_YUV444; //best quality
+            } else {
+                pixel_format = AVIF_PIXEL_FORMAT_YUV422; //high quality
+            }
+        }
+
+        avifMatrixCoefficients matrix_to_save = (avifMatrixCoefficients)1; //default for Qt 5.12 and 5.13;
+
+        avifColorPrimaries primaries_to_save = (avifColorPrimaries)2;
+        avifTransferCharacteristics transfer_to_save = (avifTransferCharacteristics)2;
+
+        if (tmpcolorimage.colorSpace().isValid()) {
+            switch (tmpcolorimage.colorSpace().primaries()) {
+            case QColorSpace::Primaries::SRgb:
+                /* AVIF_COLOR_PRIMARIES_BT709 */
+                primaries_to_save = (avifColorPrimaries)1;
+                /* AVIF_MATRIX_COEFFICIENTS_BT709 */
+                matrix_to_save = (avifMatrixCoefficients)1;
+                break;
+            case QColorSpace::Primaries::DciP3D65:
+                /* AVIF_NCLX_COLOUR_PRIMARIES_P3, AVIF_NCLX_COLOUR_PRIMARIES_SMPTE432 */
+                primaries_to_save = (avifColorPrimaries)12;
+                /* AVIF_MATRIX_COEFFICIENTS_CHROMA_DERIVED_NCL */
+                matrix_to_save = (avifMatrixCoefficients)12;
+                break;
+            default:
+                /* AVIF_TRANSFER_CHARACTERISTICS_UNSPECIFIED */
+                primaries_to_save = (avifColorPrimaries)2;
+                /* AVIF_MATRIX_COEFFICIENTS_UNSPECIFIED */
+                matrix_to_save = (avifMatrixCoefficients)2;
+                break;
+            }
+
+            switch (tmpcolorimage.colorSpace().transferFunction()) {
+            case QColorSpace::TransferFunction::Linear:
+                /* AVIF_TRANSFER_CHARACTERISTICS_LINEAR */
+                transfer_to_save = (avifTransferCharacteristics)8;
+                break;
+            case QColorSpace::TransferFunction::Gamma:
+                if (qAbs(tmpcolorimage.colorSpace().gamma() - 2.2f) < 0.1f) {
+                    /* AVIF_TRANSFER_CHARACTERISTICS_BT470M */
+                    transfer_to_save = (avifTransferCharacteristics)4;
+                } else if (qAbs(tmpcolorimage.colorSpace().gamma() - 2.8f) < 0.1f) {
+                    /* AVIF_TRANSFER_CHARACTERISTICS_BT470BG */
+                    transfer_to_save = (avifTransferCharacteristics)5;
+                } else {
+                    /* AVIF_TRANSFER_CHARACTERISTICS_UNSPECIFIED */
+                    transfer_to_save = (avifTransferCharacteristics)2;
+                }
+                break;
+            case QColorSpace::TransferFunction::SRgb:
+                /* AVIF_TRANSFER_CHARACTERISTICS_SRGB */
+                transfer_to_save = (avifTransferCharacteristics)13;
+                break;
+            default:
+                /* AVIF_TRANSFER_CHARACTERISTICS_UNSPECIFIED */
+                transfer_to_save = (avifTransferCharacteristics)2;
+                break;
+            }
+
+            //in case primaries or trc were not identified
+            if ((primaries_to_save == 2) ||
+                    (transfer_to_save == 2)) {
+
+                //upgrade image to higher bit depth
+                if (save_depth == 8) {
+                    save_depth = 10;
+                    if (tmpcolorimage.hasAlphaChannel()) {
+                        tmpcolorimage = tmpcolorimage.convertToFormat(QImage::Format_RGBA64);
+                    } else {
+                        tmpcolorimage = tmpcolorimage.convertToFormat(QImage::Format_RGBX64);
+                    }
+                }
+
+                if ((primaries_to_save == 2) &&
+                        (transfer_to_save != 2)) {    //other primaries but known trc
+                    primaries_to_save = (avifColorPrimaries)1; // AVIF_COLOR_PRIMARIES_BT709
+                    matrix_to_save = (avifMatrixCoefficients)1; // AVIF_MATRIX_COEFFICIENTS_BT709
+
+                    switch (transfer_to_save) {
+                    case 8: // AVIF_TRANSFER_CHARACTERISTICS_LINEAR
+                        tmpcolorimage.convertToColorSpace(QColorSpace(QColorSpace::Primaries::SRgb, QColorSpace::TransferFunction::Linear));
+                        break;
+                    case 4: // AVIF_TRANSFER_CHARACTERISTICS_BT470M
+                        tmpcolorimage.convertToColorSpace(QColorSpace(QColorSpace::Primaries::SRgb, 2.2f));
+                        break;
+                    case 5: // AVIF_TRANSFER_CHARACTERISTICS_BT470BG
+                        tmpcolorimage.convertToColorSpace(QColorSpace(QColorSpace::Primaries::SRgb, 2.8f));
+                        break;
+                    default: // AVIF_TRANSFER_CHARACTERISTICS_SRGB + any other
+                        tmpcolorimage.convertToColorSpace(QColorSpace(QColorSpace::Primaries::SRgb, QColorSpace::TransferFunction::SRgb));
+                        transfer_to_save = (avifTransferCharacteristics)13;
+                        break;
+                    }
+                } else if ((primaries_to_save != 2) &&
+                           (transfer_to_save == 2)) {    //recognized primaries but other trc
+                    transfer_to_save = (avifTransferCharacteristics)13;
+                    tmpcolorimage.convertToColorSpace(tmpcolorimage.colorSpace().withTransferFunction(QColorSpace::TransferFunction::SRgb));
+                } else { //unrecognized profile
+                    primaries_to_save = (avifColorPrimaries)1; // AVIF_COLOR_PRIMARIES_BT709
+                    transfer_to_save = (avifTransferCharacteristics)13;
+                    matrix_to_save = (avifMatrixCoefficients)1; // AVIF_MATRIX_COEFFICIENTS_BT709
+                    tmpcolorimage.convertToColorSpace(QColorSpace(QColorSpace::Primaries::SRgb, QColorSpace::TransferFunction::SRgb));
+                }
+            }
+        }
+        avif = avifImageCreate(tmpcolorimage.width(), tmpcolorimage.height(), save_depth, pixel_format);
+        avif->matrixCoefficients = matrix_to_save;
+
+        avif->colorPrimaries = primaries_to_save;
+        avif->transferCharacteristics = transfer_to_save;
+
+        avifRGBImage rgb;
+        avifRGBImageSetDefaults(&rgb, avif);
+        rgb.rowBytes = tmpcolorimage.bytesPerLine();
+        rgb.pixels = const_cast<uint8_t *>(tmpcolorimage.constBits());
+
+        if (save_depth > 8) { //10bit depth
+            rgb.depth = 16;
+
+            if (tmpcolorimage.hasAlphaChannel()) {
+                avif->alphaRange = AVIF_RANGE_FULL;
+            } else {
+                rgb.ignoreAlpha = AVIF_TRUE;
+            }
+
+            rgb.format = AVIF_RGB_FORMAT_RGBA;
+        } else { //8bit depth
+            rgb.depth = 8;
+
+            if (tmpcolorimage.hasAlphaChannel()) {
+                rgb.format = AVIF_RGB_FORMAT_RGBA;
+                avif->alphaRange = AVIF_RANGE_FULL;
+            } else {
+                rgb.format = AVIF_RGB_FORMAT_RGB;
+            }
+        }
+
+        res = avifImageRGBToYUV(avif, &rgb);
+        if (res != AVIF_RESULT_OK) {
+            qWarning("ERROR in avifImageRGBToYUV: %s\n", avifResultToString(res));
+            return false;
+        }
+    }
+
+    avifRWData raw = AVIF_DATA_EMPTY;
+    avifEncoder *encoder = avifEncoderCreate();
+    encoder->maxThreads = qBound(1, QThread::idealThreadCount(), 64);
+    encoder->minQuantizer = minQuantizer;
+    encoder->maxQuantizer = maxQuantizer;
+
+    if (image.hasAlphaChannel()) {
+        encoder->minQuantizerAlpha = AVIF_QUANTIZER_LOSSLESS;
+        encoder->maxQuantizerAlpha = maxQuantizerAlpha;
+    }
+
+    encoder->speed = 8;
+
+    res = avifEncoderWrite(encoder, avif, &raw);
+    avifEncoderDestroy(encoder);
+    avifImageDestroy(avif);
+
+    if (res == AVIF_RESULT_OK) {
+        qint64 status = device()->write((const char *)raw.data, raw.size);
+        avifRWDataFree(&raw);
+
+        if (status > 0) {
+            return true;
+        } else if (status == -1) {
+            qWarning("Write error: %s\n", qUtf8Printable(device()->errorString()));
+            return false;
+        }
+    } else {
+        qWarning("ERROR: Failed to encode: %s\n", avifResultToString(res));
+    }
+
+    return false;
+}
+
+
+QVariant QAVIFHandler::option(ImageOption option) const
+{
+    if (!supportsOption(option) || !ensureParsed()) {
+        return QVariant();
+    }
+
+    switch (option) {
+    case Quality:
+        return m_quality;
+    case Size:
+        return m_current_image.size();
+    case Animation:
+        if (imageCount() >= 2) {
+            return true;
+        } else {
+            return false;
+        }
+    default:
+        return QVariant();
+    }
+}
+
+void QAVIFHandler::setOption(ImageOption option, const QVariant &value)
+{
+    switch (option) {
+    case Quality:
+        m_quality = value.toInt();
+        if (m_quality > 100) {
+            m_quality = 100;
+        } else if (m_quality < 0) {
+            m_quality = 52;
+        }
+        return;
+    default:
+        break;
+    }
+    QImageIOHandler::setOption(option, value);
+}
+
+bool QAVIFHandler::supportsOption(ImageOption option) const
+{
+    return option == Quality
+           || option == Size
+           || option == Animation;
+}
+
+int QAVIFHandler::imageCount() const
+{
+    if (!ensureParsed()) {
+        return 0;
+    }
+
+    if (m_decoder->imageCount >= 1) {
+        return m_decoder->imageCount;
+    }
+    return 0;
+}
+
+int QAVIFHandler::currentImageNumber() const
+{
+    if (m_parseState == ParseAvifNotParsed) {
+        return -1;
+    }
+
+    if (m_parseState == ParseAvifError || !m_decoder) {
+        return 0;
+    }
+
+    return m_decoder->imageIndex;
+}
+
+bool QAVIFHandler::jumpToNextImage()
+{
+    if (!ensureParsed()) {
+        return false;
+    }
+
+    if (m_decoder->imageCount < 2) {
+        return true;
+    }
+
+    if (m_decoder->imageIndex >= m_decoder->imageCount - 1) {   //start from begining
+        avifDecoderReset(m_decoder);
+    }
+
+    avifResult decodeResult = avifDecoderNextImage(m_decoder);
+
+    if (decodeResult != AVIF_RESULT_OK) {
+        qWarning("ERROR: Failed to decode Next image in sequence: %s\n", avifResultToString(decodeResult));
+        m_parseState = ParseAvifError;
+        return false;
+    }
+
+    if ((m_container_width != m_decoder->image->width) ||
+            (m_container_height != m_decoder->image->height)) {
+        qWarning("Decoded image sequence size (%dx%d) do not match first image size (%dx%d)!\n",
+                 m_decoder->image->width, m_decoder->image->height,
+                 m_container_width, m_container_height);
+
+        m_parseState = ParseAvifError;
+        return false;
+    }
+
+    if (decode_one_frame()) {
+        return true;
+    } else {
+        m_parseState = ParseAvifError;
+        return false;
+    }
+
+}
+
+bool QAVIFHandler::jumpToImage(int imageNumber)
+{
+    if (!ensureParsed()) {
+        return false;
+    }
+
+    if (m_decoder->imageCount < 2) {   //not an animation
+        if (imageNumber == 0) {
+            return true;
+        } else {
+            return false;
+        }
+    }
+
+    if (imageNumber < 0 || imageNumber >= m_decoder->imageCount) {   //wrong index
+        return false;
+    }
+
+    if (imageNumber == m_decoder->imageCount) {   // we are here already
+        return true;
+    }
+
+    avifResult decodeResult = avifDecoderNthImage(m_decoder, imageNumber);
+
+    if (decodeResult != AVIF_RESULT_OK) {
+        qWarning("ERROR: Failed to decode %d th Image in sequence: %s\n", imageNumber, avifResultToString(decodeResult));
+        m_parseState = ParseAvifError;
+        return false;
+    }
+
+    if ((m_container_width != m_decoder->image->width) ||
+            (m_container_height != m_decoder->image->height)) {
+        qWarning("Decoded image sequence size (%dx%d) do not match declared container size (%dx%d)!\n",
+                 m_decoder->image->width, m_decoder->image->height,
+                 m_container_width, m_container_height);
+
+        m_parseState = ParseAvifError;
+        return false;
+    }
+
+    if (decode_one_frame()) {
+        return true;
+    } else {
+        m_parseState = ParseAvifError;
+        return false;
+    }
+}
+
+int QAVIFHandler::nextImageDelay() const
+{
+    if (!ensureParsed()) {
+        return 0;
+    }
+
+    if (m_decoder->imageCount < 2) {
+        return 0;
+    }
+
+    int delay_ms = 1000.0 * m_decoder->imageTiming.duration;
+    if (delay_ms < 1) {
+        delay_ms = 1;
+    }
+    return delay_ms;
+}
+
+int QAVIFHandler::loopCount() const
+{
+    if (!ensureParsed()) {
+        return 0;
+    }
+
+    if (m_decoder->imageCount < 2) {
+        return 0;
+    }
+
+    return 1;
+}
+
+QImageIOPlugin::Capabilities QAVIFPlugin::capabilities(QIODevice *device, const QByteArray &format) const
+{
+    if (format == "avif") {
+        return Capabilities(CanRead | CanWrite);
+    }
+
+    if (format == "avifs") {
+        return Capabilities(CanRead);
+    }
+
+    if (!format.isEmpty()) {
+        return {};
+    }
+    if (!device->isOpen()) {
+        return {};
+    }
+
+    Capabilities cap;
+    if (device->isReadable() && QAVIFHandler::canRead(device)) {
+        cap |= CanRead;
+    }
+    if (device->isWritable()) {
+        cap |= CanWrite;
+    }
+    return cap;
+}
+
+QImageIOHandler *QAVIFPlugin::create(QIODevice *device, const QByteArray &format) const
+{
+    QImageIOHandler *handler = new QAVIFHandler;
+    handler->setDevice(device);
+    handler->setFormat(format);
+    return handler;
+}

src/imageformats/avif.desktop

@@ -0,0 +1,7 @@
+[Desktop Entry]
+Type=Service
+X-KDE-ServiceTypes=QImageIOPlugins
+X-KDE-ImageFormat=avif
+X-KDE-MimeType=image/avif
+X-KDE-Read=true
+X-KDE-Write=true

src/imageformats/avif.json

@@ -0,0 +1,4 @@
+{
+    "Keys": [ "avif", "avifs" ],
+    "MimeTypes": [ "image/avif", "image/avif-sequence" ]
+}

src/imageformats/avif_p.h

@@ -0,0 +1,80 @@
+/*
+    AV1 Image File Format (AVIF) support for QImage.
+
+    SPDX-FileCopyrightText: 2020 Daniel Novomesky <dnovomesky@gmail.com>
+
+    SPDX-License-Identifier: BSD-2-Clause
+*/
+
+#ifndef KIMG_AVIF_P_H
+#define KIMG_AVIF_P_H
+
+#include <QImage>
+#include <QVariant>
+#include <qimageiohandler.h>
+#include <QImageIOPlugin>
+#include <QByteArray>
+#include <avif/avif.h>
+
+class QAVIFHandler : public QImageIOHandler
+{
+public:
+  QAVIFHandler();
+  ~QAVIFHandler();
+
+  bool canRead() const override;
+  bool read (QImage *image) override;
+  bool write (const QImage &image) override;
+
+  static bool canRead (QIODevice *device);
+
+  QVariant option (ImageOption option) const override;
+  void setOption (ImageOption option, const QVariant &value) override;
+  bool supportsOption (ImageOption option) const override;
+
+  int imageCount() const override;
+  int currentImageNumber() const override;
+  bool jumpToNextImage() override;
+  bool jumpToImage (int imageNumber) override;
+
+  int nextImageDelay() const override;
+
+  int loopCount() const override;
+private:
+  bool ensureParsed() const;
+  bool ensureDecoder();
+  bool decode_one_frame();
+
+  enum ParseAvifState
+  {
+    ParseAvifError = -1,
+    ParseAvifNotParsed = 0,
+    ParseAvifSuccess = 1
+  };
+
+  ParseAvifState m_parseState;
+  int m_quality;
+
+  uint32_t m_container_width;
+  uint32_t m_container_height;
+
+  QByteArray m_rawData;
+  avifROData m_rawAvifData;
+
+  avifDecoder *m_decoder;
+  QImage        m_current_image;
+
+  bool m_must_jump_to_next_image;
+};
+
+class QAVIFPlugin : public QImageIOPlugin
+{
+  Q_OBJECT
+  Q_PLUGIN_METADATA (IID "org.qt-project.Qt.QImageIOHandlerFactoryInterface" FILE "avif.json")
+
+public:
+  Capabilities capabilities (QIODevice *device, const QByteArray &format) const override;
+  QImageIOHandler *create (QIODevice *device, const QByteArray &format = QByteArray()) const override;
+};
+
+#endif // KIMG_AVIF_P_H

src/imageformats/psd.cpp

@@ -87,7 +87,7 @@ static bool IsSupported(const PSDHeader &header)
     if (header.channel_count > 16) {
         return false;
     }
-    if (header.depth != 8) {
+    if (header.depth != 8 && header.depth != 16) {
         return false;
     }
     if (header.color_mode != CM_RGB) {
@@ -104,11 +104,13 @@ static void skip_section(QDataStream &s)
     s.skipRawData(section_length);
 }
 
-static quint8 readPixel(QDataStream &stream) {
-    quint8 pixel;
+template <class Trait>
+static Trait readPixel(QDataStream &stream) {
+    Trait pixel;
     stream >> pixel;
     return pixel;
 }
+
 static QRgb updateRed(QRgb oldPixel, quint8 redPixel) {
     return qRgba(redPixel, qGreen(oldPixel), qBlue(oldPixel), qAlpha(oldPixel));
 }
@@ -149,15 +151,18 @@ static bool LoadPSD(QDataStream &stream, const PSDHeader &header, QImage &img)
 
     quint32 channel_num = header.channel_count;
 
-    QImage::Format fmt = QImage::Format_RGB32;
+    QImage::Format fmt = header.depth == 8 ? QImage::Format_RGB32
+                                           : QImage::Format_RGBX64;
     // Clear the image.
     if (channel_num >= 4) {
         // Enable alpha.
-        fmt = QImage::Format_ARGB32;
+        fmt = header.depth == 8 ? QImage::Format_ARGB32
+                                : QImage::Format_RGBA64;
 
         // Ignore the other channels.
         channel_num = 4;
     }
+
     img = QImage(header.width, header.height, fmt);
     if (img.isNull()) {
         qWarning() << "Failed to allocate image, invalid dimensions?" << QSize(header.width, header.height);
@@ -166,9 +171,10 @@ static bool LoadPSD(QDataStream &stream, const PSDHeader &header, QImage &img)
     img.fill(qRgb(0,0,0));
 
     const quint32 pixel_count = header.height * header.width;
+    const quint32 channel_size = pixel_count * header.depth / 8;
 
     // Verify this, as this is used to write into the memory of the QImage
-    if (pixel_count > img.sizeInBytes() / sizeof(QRgb)) {
+    if (pixel_count > img.sizeInBytes() / (header.depth == 8 ? sizeof(QRgb) : sizeof(QRgba64))) {
         qWarning() << "Invalid pixel count!" << pixel_count << "bytes available:" << img.sizeInBytes();
         return false;
     }
@@ -186,6 +192,14 @@ static bool LoadPSD(QDataStream &stream, const PSDHeader &header, QImage &img)
         updateAlpha
     };
 
+    typedef QRgba64(*channelUpdater16)(QRgba64, quint16);
+    static const channelUpdater16 updaters64[4] = {
+        [](QRgba64 oldPixel, quint16 redPixel)  {return qRgba64((oldPixel & ~(0xFFFFull <<  0)) | (quint64(  redPixel) <<  0));},
+        [](QRgba64 oldPixel, quint16 greenPixel){return qRgba64((oldPixel & ~(0xFFFFull << 16)) | (quint64(greenPixel) << 16));},
+        [](QRgba64 oldPixel, quint16 bluePixel) {return qRgba64((oldPixel & ~(0xFFFFull << 32)) | (quint64( bluePixel) << 32));},
+        [](QRgba64 oldPixel, quint16 alphaPixel){return qRgba64((oldPixel & ~(0xFFFFull << 48)) | (quint64(alphaPixel) << 48));}
+    };
+
     if (compression) {
         // Skip row lengths.
         int skip_count = header.height * header.channel_count * sizeof(quint16);
@@ -194,9 +208,18 @@ static bool LoadPSD(QDataStream &stream, const PSDHeader &header, QImage &img)
         }
 
         for (unsigned short channel = 0; channel < channel_num; channel++) {
-            bool success = decodeRLEData(RLEVariant::PackBits, stream,
-			                 image_data, pixel_count,
-					 &readPixel, updaters[channel]);
+            bool success = false;
+            if (header.depth == 8) {
+                success = decodeRLEData(RLEVariant::PackBits, stream,
+                                         image_data, channel_size,
+                                         &readPixel<quint8>, updaters[channel]);
+            } else if (header.depth == 16) {
+                QRgba64 *image_data = reinterpret_cast<QRgba64*>(img.bits());
+                success = decodeRLEData(RLEVariant::PackBits16, stream,
+                                         image_data, channel_size,
+                                         &readPixel<quint8>, updaters64[channel]);
+            }
+
             if (!success) {
                 qDebug() << "decodeRLEData on channel" << channel << "failed";
                 return false;
@@ -204,8 +227,15 @@ static bool LoadPSD(QDataStream &stream, const PSDHeader &header, QImage &img)
         }
     } else {
         for (unsigned short channel = 0; channel < channel_num; channel++) {
-            for (unsigned i = 0; i < pixel_count; ++i) {
-                image_data[i] = updaters[channel](image_data[i], readPixel(stream));
+            if (header.depth == 8) {
+                for (unsigned i = 0; i < pixel_count; ++i) {
+                    image_data[i] = updaters[channel](image_data[i], readPixel<quint8>(stream));
+                }
+            } else if (header.depth == 16) {
+                QRgba64 *image_data = reinterpret_cast<QRgba64*>(img.bits());
+                for (unsigned i = 0; i < pixel_count; ++i) {
+                    image_data[i] = updaters64[channel](image_data[i], readPixel<quint16>(stream));
+                }
             }
             // make sure we didn't try to read past the end of the stream
             if (stream.status() != QDataStream::Ok) {

src/imageformats/rle_p.h

@@ -24,6 +24,11 @@ enum class RLEVariant {
      * of size 2, 130 of size 3, up to 255 of size 128.
      */
     PackBits,
+    /**
+     * Same as PackBits, but treat unpacked data as
+     * 16-bit integers.
+     */
+    PackBits16,
     /**
      * PIC-style RLE
      *
@@ -67,6 +72,8 @@ static inline bool decodeRLEData(RLEVariant variant,
                                  Func2 updateItem)
 {
     unsigned offset = 0; // in dest
+    bool is_msb = true; // only used for 16-bit PackBits, data is big-endian
+    quint16 temp_data = 0;
     while (offset < length) {
         unsigned remaining = length - offset;
         quint8 count1;
@@ -85,7 +92,7 @@ static inline bool decodeRLEData(RLEVariant variant,
                     // 2 to 128 repetitions
                     length = count1 - 127u;
                 }
-            } else if (variant == RLEVariant::PackBits) {
+            } else if (variant == RLEVariant::PackBits || variant == RLEVariant::PackBits16) {
                 if (count1 == 128u) {
                     // Ignore value 128
                     continue;
@@ -102,7 +109,18 @@ static inline bool decodeRLEData(RLEVariant variant,
             }
             auto datum = readData(stream);
             for (unsigned i = offset; i < offset + length; ++i) {
-                dest[i] = updateItem(dest[i], datum);
+                if (variant == RLEVariant::PackBits16) {
+                    if (is_msb) {
+                        temp_data = datum << 8;
+                        is_msb = false;
+                    } else {
+                        temp_data |= datum;
+                        dest[i >> 1] = updateItem(dest[i >> 1], temp_data);
+                        is_msb = true;
+                    }
+                } else {
+                    dest[i] = updateItem(dest[i], datum);
+                }
             }
             offset += length;
         } else {
@@ -114,7 +132,18 @@ static inline bool decodeRLEData(RLEVariant variant,
             }
             for (unsigned i = offset; i < offset + length; ++i) {
                 auto datum = readData(stream);
-                dest[i] = updateItem(dest[i], datum);
+                if (variant == RLEVariant::PackBits16) {
+                    if (is_msb) {
+                        temp_data = datum << 8;
+                        is_msb = false;
+                    } else {
+                        temp_data |= datum;
+                        dest[i >> 1] = updateItem(dest[i >> 1], temp_data);
+                        is_msb = true;
+                    }
+                } else {
+                    dest[i] = updateItem(dest[i], datum);
+                }
             }
             offset += length;
         }

tests/format-enum.h

@@ -7,56 +7,24 @@
 #ifndef FORMAT_ENUM_H
 #define FORMAT_ENUM_H
 
+#include <QMetaEnum>
 #include <QImage>
 
-// Generated from QImage::Format enum
-static const char * qimage_format_enum_names[] = {
-    "Invalid",
-    "Mono",
-    "MonoLSB",
-    "Indexed8",
-    "RGB32",
-    "ARGB32",
-    "ARGB32_Premultiplied",
-    "RGB16",
-    "ARGB8565_Premultiplied",
-    "RGB666",
-    "ARGB6666_Premultiplied",
-    "RGB555",
-    "ARGB8555_Premultiplied",
-    "RGB888",
-    "RGB444",
-    "ARGB4444_Premultiplied",
-    "RGBX8888",
-    "RGBA8888",
-    "RGBA8888_Premultiplied"
-};
-// Never claim there are more than QImage::NImageFormats supported formats.
-// This is future-proofing against the above list being extended.
-static const int qimage_format_enum_names_count =
-    (sizeof(qimage_format_enum_names) / sizeof(*qimage_format_enum_names) > int(QImage::NImageFormats))
-    ? int(QImage::NImageFormats)
-    : (sizeof(qimage_format_enum_names) / sizeof(*qimage_format_enum_names));
-
 QImage::Format formatFromString(const QString &str)
 {
-    for (int i = 0; i < qimage_format_enum_names_count; ++i) {
-        if (str.compare(QLatin1String(qimage_format_enum_names[i]), Qt::CaseInsensitive) == 0) {
-            return (QImage::Format)(i);
-        }
-    }
-    return QImage::Format_Invalid;
+    const QMetaEnum metaEnum = QMetaEnum::fromType<QImage::Format>();
+    const QString enumString = QStringLiteral("Format_") + str;
+
+    bool ok;
+    const int res = metaEnum.keyToValue(enumString.toLatin1().constData(), &ok);
+
+    return ok ? static_cast<QImage::Format>(res) : QImage::Format_Invalid;
 }
 
 QString formatToString(QImage::Format format)
 {
-    int index = int(format);
-    if (index > 0 && index < qimage_format_enum_names_count) {
-        return QLatin1String(qimage_format_enum_names[index]);
-    }
-    return QLatin1String("<unknown:") +
-        QString::number(index) +
-        QLatin1String(">");
+    const QMetaEnum metaEnum = QMetaEnum::fromType<QImage::Format>();
+    return QString::fromLatin1(metaEnum.valueToKey(format)).remove(QStringLiteral("Format_"));
 }
 
 #endif

tests/imagedump.cpp

@@ -45,6 +45,10 @@ int main(int argc, char **argv)
         QStringList() << QStringLiteral("l") << QStringLiteral("list-file-formats"),
         QStringLiteral("List supported image file formats"));
     parser.addOption(listformats);
+    QCommandLineOption listmimetypes(
+        QStringList() << QStringLiteral("m") << QStringLiteral("list-mime-types"),
+        QStringLiteral("List supported image mime types"));
+    parser.addOption(listmimetypes);
     QCommandLineOption listqformats(
         QStringList() << QStringLiteral("p") << QStringLiteral("list-qimage-formats"),
         QStringLiteral("List supported QImage data formats"));
@@ -63,12 +67,21 @@ int main(int argc, char **argv)
         }
         return 0;
     }
+    if (parser.isSet(listmimetypes)) {
+        QTextStream out(stdout);
+        out << "MIME types:\n";
+        const auto lstSupportedMimeTypes = QImageReader::supportedMimeTypes();
+        for (const auto &fmt : lstSupportedMimeTypes) {
+            out << "  " << fmt << '\n';
+        }
+        return 0;
+    }
     if (parser.isSet(listqformats)) {
         QTextStream out(stdout);
         out << "QImage formats:\n";
         // skip QImage::Format_Invalid
-        for (int i = 1; i < qimage_format_enum_names_count; ++i) {
-            out << "  " << qimage_format_enum_names[i] << '\n';
+        for (int i = 1; i < QImage::NImageFormats; ++i) {
+            out << "  " << formatToString(static_cast<QImage::Format>(i)) << '\n';
         }
         return 0;
     }