GIT_SILENT Upgrade ECM and KF5 version requirements for 5.78.0 release.

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 5.78.0  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

@@ -20,6 +20,7 @@ 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

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 +24,14 @@ endfunction()
 
 ##################################
 
+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/avif.cpp

@@ -0,0 +1,959 @@
+/*
+    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 {
+
+        avifColorPrimaries primaries_to_load;
+        avifTransferCharacteristics trc_to_load;
+
+        if ((m_decoder->image->colorPrimaries == 2 /* AVIF_COLOR_PRIMARIES_UNSPECIFIED */) ||
+                (m_decoder->image->colorPrimaries == 0 /* AVIF_COLOR_PRIMARIES_UNKNOWN */)) {
+            primaries_to_load = (avifColorPrimaries) 1; // AVIF_COLOR_PRIMARIES_BT709
+        } else {
+            primaries_to_load = m_decoder->image->colorPrimaries;
+        }
+        if ((m_decoder->image->transferCharacteristics == 2 /* AVIF_TRANSFER_CHARACTERISTICS_UNSPECIFIED */) ||
+                (m_decoder->image->transferCharacteristics == 0 /* AVIF_TRANSFER_CHARACTERISTICS_UNKNOWN */)) {
+            trc_to_load = (avifTransferCharacteristics) 13; // AVIF_TRANSFER_CHARACTERISTICS_SRGB
+        } else {
+            trc_to_load = m_decoder->image->transferCharacteristics;
+        }
+
+        float prim[8]; // outPrimaries: rX, rY, gX, gY, bX, bY, wX, wY
+        avifColorPrimariesGetValues(primaries_to_load, 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 (trc_to_load) {
+        /* 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 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 (primaries_to_load) {
+            /* AVIF_COLOR_PRIMARIES_BT709 */
+            case 1:
+                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

@@ -67,8 +67,8 @@ int main(int argc, char **argv)
         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;
     }