Update dependency version to 6.14.0

This patch improve the string read/write in case of non ASCII encoding.
- When reading, checks for UTF-8 text even on ASCII data type. If it fails, Latin1 converter is used.
- When writing using V3 specs, a better check is done to identify 7-bit ASCII text.

Related to MR !358

.kde-ci.yml

@@ -7,5 +7,5 @@ Dependencies:
 Options:
  test-before-installing: True
  require-passing-tests-on: ['Linux', 'FreeBSD', 'Windows']
- cmake-options: "-DKIMAGEFORMATS_DDS=ON -DKIMAGEFORMATS_JXR=ON"
+ cmake-options: "-DKIMAGEFORMATS_DDS=ON -DKIMAGEFORMATS_JXR=ON -DKIMAGEFORMATS_HEIF=ON"
  per-test-timeout: 90

CMakeLists.txt

@@ -1,11 +1,11 @@
 cmake_minimum_required(VERSION 3.16)
 
-set(KF_VERSION "6.12.0") # handled by release scripts
-set(KF_DEP_VERSION "6.12.0") # handled by release scripts
+set(KF_VERSION "6.14.0") # handled by release scripts
+set(KF_DEP_VERSION "6.14.0") # handled by release scripts
 project(KImageFormats VERSION ${KF_VERSION})
 
 include(FeatureSummary)
-find_package(ECM 6.12.0  NO_MODULE)
+find_package(ECM 6.14.0  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)
 
@@ -21,7 +21,7 @@ include(ECMDeprecationSettings)
 include(CheckIncludeFiles)
 include(FindPkgConfig)
 
-set(REQUIRED_QT_VERSION 6.6.0)
+set(REQUIRED_QT_VERSION 6.7.0)
 find_package(Qt6Gui ${REQUIRED_QT_VERSION} REQUIRED NO_MODULE)
 
 find_package(KF6Archive ${KF_DEP_VERSION})
@@ -99,8 +99,8 @@ endif()
 add_feature_info(LibJXR LibJXR_FOUND "required for the QImage plugin for JPEG XR images")
 
 ecm_set_disabled_deprecation_versions(
-    QT 6.8.0
-    KF 6.11.0
+    QT 6.9.0
+    KF 6.12.0
 )
 
 add_subdirectory(src)

autotests/CMakeLists.txt

@@ -122,9 +122,12 @@ if (LibHeif_FOUND)
         kimageformats_read_tests(FUZZ 1
             hej2
         )
+        kimageformats_write_tests(FUZZ 1
+            hej2-nodatacheck-lossless
+        )
     endif()
 
-    if (LibHeif_VERSION VERSION_GREATER_EQUAL "1.19.0")
+    if (LibHeif_VERSION VERSION_GREATER_EQUAL "1.19.6")
         kimageformats_read_tests(FUZZ 4
             avci
         )

autotests/readtest.cpp

@@ -258,6 +258,15 @@ int main(int argc, char **argv)
     });
     QTextStream(stdout) << "QImageReader::supportedImageFormats: " << formatStrings.join(", ") << "\n";
 
+    if (!formats.contains(format)) {
+        if (format == "avci" || format == "heif" || format == "hej2") {
+            QTextStream(stdout) << "WARNING : " << suffix << " is not supported with current libheif configuration!\n"
+                                << "********* "
+                                << "Finished basic read tests for " << suffix << " images *********\n";
+            return 0;
+        }
+    }
+
     const QFileInfoList lstImgDir = imgdir.entryInfoList();
     // Launch 2 runs for each test: first run on a random access device, second run on a sequential access device
     for (int seq = 0; seq < 2; ++seq) {
@@ -323,7 +332,12 @@ int main(int argc, char **argv)
             OptionTest optionTest;
             if (!optionTest.store(&inputReader)) {
                 QTextStream(stdout) << "FAIL : " << fi.fileName() << ": error while reading options\n";
-                ++failed;
+                if (format == "heif") {
+                    // libheif + ffmpeg decoder is unable to load all HEIF files.
+                    ++skipped;
+                } else {
+                    ++failed;
+                }
                 continue;
             }
 

autotests/write/basic/avif.json

@@ -31,7 +31,7 @@
         },
         {
             "key" : "Description",
-            "value" : "TV broadcast test image."
+            "value" : "テレビ放送テスト映像。(TV broadcast test image.)"
         },
         {
             "key" : "Latitude",

autotests/write/basic/heif.json

@@ -31,7 +31,7 @@
         },
         {
             "key" : "Description",
-            "value" : "TV broadcast test image."
+            "value" : "テレビ放送テスト映像。(TV broadcast test image.)"
         },
         {
             "key" : "Latitude",

autotests/write/basic/hej2.json

@@ -0,0 +1,65 @@
+{
+    "format" : "hej2",
+    "metadata" : [
+        {
+            "key" : "CreationDate",
+            "value" : "2025-01-14T13:53:32+01:00"
+        },
+        {
+            "key" : "Direction",
+            "value" : "123.7"
+        },
+        {
+            "key" : "ModificationDate",
+            "value" : "2025-02-14T15:58:44+01:00"
+        },
+        {
+            "key" : "Software" ,
+            "value" : "Adobe Photoshop 26.2 (Windows)"
+        },
+        {
+            "key" : "Altitude",
+            "value" : "34"
+        },
+        {
+            "key" : "Author",
+            "value" : "KDE Project"
+        },
+        {
+            "key" : "Copyright",
+            "value" : "@2025 KDE Project"
+        },
+        {
+            "key" : "Description",
+            "value" : "TV broadcast test image."
+        },
+        {
+            "key" : "Latitude",
+            "value" : "44.6478"
+        },
+        {
+            "key" : "LensManufacturer",
+            "value" : "KDE Glasses"
+        },
+        {
+            "key" : "LensModel",
+            "value" : "A1234"
+        },
+        {
+            "key" : "Longitude",
+            "value" : "10.9254"
+        },
+        {
+            "key" : "Manufacturer",
+            "value" : "KFramework"
+        },
+        {
+            "key" : "Model",
+            "value" : "KImageFormats"
+        }
+    ],
+    "resolution" : {
+        "dotsPerMeterX" : 11811,
+        "dotsPerMeterY" : 11812
+    }
+}

autotests/write/basic/jxl.json

@@ -31,7 +31,7 @@
         },
         {
             "key" : "Description",
-            "value" : "TV broadcast test image."
+            "value" : "テレビ放送テスト映像。(TV broadcast test image.)"
         },
         {
             "key" : "Latitude",

autotests/writetest.cpp

@@ -370,7 +370,12 @@ int formatTest(const QString &suffix, bool createTemplates)
         QBuffer buffer(&ba);
         auto writtenImage = QImageReader(&buffer, suffix.toLatin1()).read();
         if (writtenImage.isNull()) {
-            ++failed;
+            if (suffix.toLatin1() == "heif") {
+                // libheif + ffmpeg decoder is unable to load all HEIF files.
+                ++skipped;
+            } else {
+                ++failed;
+            }
             QTextStream(stdout) << "FAIL : error while reading the image " << formatName << "\n";
             continue;
         }
@@ -622,8 +627,28 @@ int main(int argc, char **argv)
         }
     }
 
-    // run test
     auto suffix = args.at(0);
+
+    // skip test if libheif configuration is obviously incomplete
+    QByteArray format = suffix.toLatin1();
+    const QList<QByteArray> read_formats = QImageReader::supportedImageFormats();
+    const QList<QByteArray> write_formats = QImageWriter::supportedImageFormats();
+
+    if (!read_formats.contains(format)) {
+        if (format == "heif" || format == "hej2") {
+            QTextStream(stdout) << "WARNING : libheif configuration is missing necessary decoder(s)!\n";
+            return 0;
+        }
+    }
+
+    if (!write_formats.contains(format)) {
+        if (format == "heif" || format == "hej2") {
+            QTextStream(stdout) << "WARNING : libheif configuration is missing necessary encoder(s)!\n";
+            return 0;
+        }
+    }
+
+    // run test
     auto ret = basicTest(suffix, parser.isSet(lossless), parser.isSet(ignoreDataCheck), parser.isSet(skipOptTest), fuzzarg);
     if (ret == 0) {
         ret = formatTest(suffix, parser.isSet(createFormatTempates));

src/imageformats/CMakeLists.txt

@@ -15,6 +15,16 @@ function(kimageformats_add_plugin plugin)
     target_sources(${plugin} PRIVATE ${KIF_ADD_PLUGIN_SOURCES})
     set_target_properties(${plugin} PROPERTIES LIBRARY_OUTPUT_DIRECTORY ${CMAKE_LIBRARY_OUTPUT_DIRECTORY}/imageformats)
     target_link_libraries(${plugin} PRIVATE Qt6::Gui)
+
+    if(ANDROID)
+        # Plugins should be named with lib prefix on Android
+        # Working name: libplugins_imageformats_kimg_avif_armeabi-v7a.so
+        # Doesn't work: plugins_imageformats_kimg_avif_armeabi-v7a.so
+        if(NOT ${CMAKE_SHARED_LIBRARY_PREFIX} STREQUAL "")
+            set_target_properties(${plugin} PROPERTIES PREFIX ${CMAKE_SHARED_LIBRARY_PREFIX})
+        endif()
+    endif()
+
     install(TARGETS ${plugin} DESTINATION ${KDE_INSTALL_QTPLUGINDIR}/imageformats)
 endfunction()
 

src/imageformats/dds.cpp

@@ -2557,3 +2557,5 @@ QImageIOHandler *QDDSPlugin::create(QIODevice *device, const QByteArray &format)
     handler->setFormat(format);
     return handler;
 }
+
+#include "moc_dds_p.cpp"

src/imageformats/heif.cpp

@@ -16,8 +16,8 @@
 #include <QDebug>
 #include <QPointF>
 #include <QSysInfo>
+#include <cstring>
 #include <limits>
-#include <string.h>
 
 #ifndef HEIF_MAX_METADATA_SIZE
 /*!
@@ -26,12 +26,12 @@
 #define HEIF_MAX_METADATA_SIZE (4 * 1024 * 1024)
 #endif
 
-
 size_t HEIFHandler::m_initialized_count = 0;
 bool HEIFHandler::m_plugins_queried = false;
 bool HEIFHandler::m_heif_decoder_available = false;
 bool HEIFHandler::m_heif_encoder_available = false;
 bool HEIFHandler::m_hej2_decoder_available = false;
+bool HEIFHandler::m_hej2_encoder_available = false;
 bool HEIFHandler::m_avci_decoder_available = false;
 
 extern "C" {
@@ -155,6 +155,14 @@ bool HEIFHandler::write_helper(const QImage &image)
         break;
     }
 
+    heif_compression_format encoder_codec = heif_compression_HEVC;
+#if LIBHEIF_HAVE_VERSION(1, 13, 0)
+    if (format() == "hej2") {
+        encoder_codec = heif_compression_JPEG2000;
+        save_depth = 8; // for compatibility reasons
+    }
+#endif
+
     heif_chroma chroma;
     if (save_depth > 8) {
         if (save_alpha) {
@@ -287,7 +295,7 @@ bool HEIFHandler::write_helper(const QImage &image)
     }
 
     struct heif_encoder *encoder = nullptr;
-    err = heif_context_get_encoder_for_format(context, heif_compression_HEVC, &encoder);
+    err = heif_context_get_encoder_for_format(context, encoder_codec, &encoder);
     if (err.code) {
         qWarning() << "Unable to get an encoder instance:" << err.message;
         heif_image_release(h_image);
@@ -314,7 +322,7 @@ bool HEIFHandler::write_helper(const QImage &image)
         }
     }
 
-    struct heif_image_handle* handle;
+    struct heif_image_handle *handle;
     err = heif_context_encode_image(context, h_image, encoder, encoder_options, &handle);
 
     // exif metadata
@@ -554,7 +562,7 @@ bool HEIFHandler::ensureDecoder()
 
     QImage::Format target_image_format;
 
-    if (bit_depth == 10 || bit_depth == 12) {
+    if (bit_depth == 10 || bit_depth == 12 || bit_depth == 16) {
         if (hasAlphaChannel) {
             chroma = (QSysInfo::ByteOrder == QSysInfo::LittleEndian) ? heif_chroma_interleaved_RRGGBBAA_LE : heif_chroma_interleaved_RRGGBBAA_BE;
             target_image_format = QImage::Format_RGBA64;
@@ -646,6 +654,35 @@ bool HEIFHandler::ensureDecoder()
     }
 
     switch (bit_depth) {
+    case 16:
+        if (hasAlphaChannel) {
+            for (int y = 0; y < imageHeight; y++) {
+                memcpy(m_current_image.scanLine(y), src + (y * stride), 8 * size_t(imageWidth));
+            }
+        } else { // no alpha channel
+            for (int y = 0; y < imageHeight; y++) {
+                const uint16_t *src_word = reinterpret_cast<const uint16_t *>(src + (y * stride));
+                uint16_t *dest_data = reinterpret_cast<uint16_t *>(m_current_image.scanLine(y));
+                for (int x = 0; x < imageWidth; x++) {
+                    // R
+                    *dest_data = *src_word;
+                    src_word++;
+                    dest_data++;
+                    // G
+                    *dest_data = *src_word;
+                    src_word++;
+                    dest_data++;
+                    // B
+                    *dest_data = *src_word;
+                    src_word++;
+                    dest_data++;
+                    // X = 0xffff
+                    *dest_data = 0xffff;
+                    dest_data++;
+                }
+            }
+        }
+        break;
     case 12:
         if (hasAlphaChannel) {
             for (int y = 0; y < imageHeight; y++) {
@@ -991,6 +1028,13 @@ bool HEIFHandler::isHej2DecoderAvailable()
     return m_hej2_decoder_available;
 }
 
+bool HEIFHandler::isHej2EncoderAvailable()
+{
+    HEIFHandler::queryHeifLib();
+
+    return m_hej2_encoder_available;
+}
+
 bool HEIFHandler::isAVCIDecoderAvailable()
 {
     HEIFHandler::queryHeifLib();
@@ -1013,8 +1057,9 @@ void HEIFHandler::queryHeifLib()
         m_heif_decoder_available = heif_have_decoder_for_format(heif_compression_HEVC);
 #if LIBHEIF_HAVE_VERSION(1, 13, 0)
         m_hej2_decoder_available = heif_have_decoder_for_format(heif_compression_JPEG2000);
+        m_hej2_encoder_available = heif_have_encoder_for_format(heif_compression_JPEG2000);
 #endif
-#if LIBHEIF_HAVE_VERSION(1, 19, 0)
+#if LIBHEIF_HAVE_VERSION(1, 19, 6)
         m_avci_decoder_available = heif_have_decoder_for_format(heif_compression_AVC);
 #endif
         m_plugins_queried = true;
@@ -1081,6 +1126,9 @@ QImageIOPlugin::Capabilities HEIFPlugin::capabilities(QIODevice *device, const Q
         if (HEIFHandler::isHej2DecoderAvailable()) {
             format_cap |= CanRead;
         }
+        if (HEIFHandler::isHej2EncoderAvailable()) {
+            format_cap |= CanWrite;
+        }
         return format_cap;
     }
 
@@ -1110,7 +1158,7 @@ QImageIOPlugin::Capabilities HEIFPlugin::capabilities(QIODevice *device, const Q
         }
     }
 
-    if (device->isWritable() && HEIFHandler::isHeifEncoderAvailable()) {
+    if (device->isWritable() && (HEIFHandler::isHeifEncoderAvailable() || HEIFHandler::isHej2EncoderAvailable())) {
         cap |= CanWrite;
     }
     return cap;

src/imageformats/heif_p.h

@@ -31,6 +31,7 @@ public:
     static bool isHeifDecoderAvailable();
     static bool isHeifEncoderAvailable();
     static bool isHej2DecoderAvailable();
+    static bool isHej2EncoderAvailable();
     static bool isAVCIDecoderAvailable();
 
     static bool isSupportedBMFFType(const QByteArray &header);
@@ -62,6 +63,7 @@ private:
     static bool m_heif_decoder_available;
     static bool m_heif_encoder_available;
     static bool m_hej2_decoder_available;
+    static bool m_hej2_encoder_available;
     static bool m_avci_decoder_available;
 
     static QMutex &getHEIFHandlerMutex();

src/imageformats/jxl.cpp

@@ -20,7 +20,7 @@
 #include <string.h>
 
 // Avoid rotation on buggy Qts (see also https://bugreports.qt.io/browse/QTBUG-126575)
-#if (QT_VERSION >= QT_VERSION_CHECK(6, 5, 7) && QT_VERSION < QT_VERSION_CHECK(6, 6, 0)) || (QT_VERSION >= QT_VERSION_CHECK(6, 7, 3))
+#if QT_VERSION >= QT_VERSION_CHECK(6, 7, 3)
 #ifndef JXL_QT_AUTOTRANSFORM
 #define JXL_QT_AUTOTRANSFORM
 #endif

src/imageformats/jxr.cpp

@@ -720,11 +720,11 @@ public:
 
         auto exif = MicroExif::fromImage(image);
         if (!exif.isEmpty()) {
-            auto exifIfd = exif.exifIfdByteArray(QDataStream::LittleEndian);
+            auto exifIfd = exif.exifIfdByteArray(QDataStream::LittleEndian, MicroExif::V2);
             if (auto err = PKImageEncode_SetEXIFMetadata_WMP(pEncoder, reinterpret_cast<const quint8 *>(exifIfd.constData()), exifIfd.size())) {
                 qCWarning(LOG_JXRPLUGIN) << "JXRHandler::write() error while setting EXIF data:" << err;
             }
-            auto gpsIfd = exif.gpsIfdByteArray(QDataStream::LittleEndian);
+            auto gpsIfd = exif.gpsIfdByteArray(QDataStream::LittleEndian, MicroExif::V2);
             if (auto err = PKImageEncode_SetGPSInfoMetadata_WMP(pEncoder, reinterpret_cast<const quint8 *>(gpsIfd.constData()), gpsIfd.size())) {
                 qCWarning(LOG_JXRPLUGIN) << "JXRHandler::write() error while setting GPS data:" << err;
             }
@@ -991,7 +991,7 @@ bool JXRHandler::read(QImage *outImage)
                 return false;
             }
             for (qint32 y = 0, h = img.height(); y < h; ++y) {
-                std::memcpy(img.scanLine(y), ba.data() + convStrideSize * y, (std::min)(convStrideSize, img.bytesPerLine()));
+                std::memcpy(img.scanLine(y), ba.data() + convStrideSize * y, (std::min)(convStrideSize, qint64(img.bytesPerLine())));
             }
         }
         PKFormatConverter_Release(&pConverter);

src/imageformats/microexif.cpp

@@ -12,6 +12,7 @@
 #include <QCoreApplication>
 #include <QDataStream>
 #include <QHash>
+#include <QStringDecoder>
 #include <QTimeZone>
 
 // TIFF 6 specs
@@ -111,17 +112,17 @@ static const KnownTags staticTagTypes = {
     TagInfo(TIFF_IMAGEWIDTH, ExifTagType::Long),
     TagInfo(TIFF_IMAGEHEIGHT, ExifTagType::Long),
     TagInfo(TIFF_BITSPERSAMPLE, ExifTagType::Short),
-    TagInfo(TIFF_IMAGEDESCRIPTION, ExifTagType::Ascii),
-    TagInfo(TIFF_MAKE, ExifTagType::Ascii),
-    TagInfo(TIFF_MODEL, ExifTagType::Ascii),
+    TagInfo(TIFF_IMAGEDESCRIPTION, ExifTagType::Utf8),
+    TagInfo(TIFF_MAKE, ExifTagType::Utf8),
+    TagInfo(TIFF_MODEL, ExifTagType::Utf8),
     TagInfo(TIFF_ORIENT, ExifTagType::Short),
     TagInfo(TIFF_XRES, ExifTagType::Rational),
     TagInfo(TIFF_YRES, ExifTagType::Rational),
     TagInfo(TIFF_URES, ExifTagType::Short),
-    TagInfo(TIFF_SOFTWARE, ExifTagType::Ascii),
-    TagInfo(TIFF_ARTIST, ExifTagType::Ascii),
+    TagInfo(TIFF_SOFTWARE, ExifTagType::Utf8),
+    TagInfo(TIFF_ARTIST, ExifTagType::Utf8),
     TagInfo(TIFF_DATETIME, ExifTagType::Ascii),
-    TagInfo(TIFF_COPYRIGHT, ExifTagType::Ascii),
+    TagInfo(TIFF_COPYRIGHT, ExifTagType::Utf8),
     TagInfo(EXIF_EXIFIFD, ExifTagType::Long),
     TagInfo(EXIF_GPSIFD, ExifTagType::Long),
     TagInfo(EXIF_DATETIMEORIGINAL, ExifTagType::Ascii),
@@ -134,10 +135,10 @@ static const KnownTags staticTagTypes = {
     TagInfo(EXIF_PIXELYDIM, ExifTagType::Long),
     TagInfo(EXIF_IMAGEUNIQUEID, ExifTagType::Ascii),
     TagInfo(EXIF_BODYSERIALNUMBER, ExifTagType::Ascii),
-    TagInfo(EXIF_LENSMAKE, ExifTagType::Ascii),
-    TagInfo(EXIF_LENSMODEL, ExifTagType::Ascii),
+    TagInfo(EXIF_LENSMAKE, ExifTagType::Utf8),
+    TagInfo(EXIF_LENSMODEL, ExifTagType::Utf8),
     TagInfo(EXIF_LENSSERIALNUMBER, ExifTagType::Ascii),
-    TagInfo(EXIF_IMAGETITLE, ExifTagType::Ascii),
+    TagInfo(EXIF_IMAGETITLE, ExifTagType::Utf8),
     TagInfo(EXIF_EXIFVERSION, ExifTagType::Undefined)
 };
 // clang-format on
@@ -367,6 +368,28 @@ static void writeData(QDataStream &ds, const QVariant &value, const ExifTagType&
     }
 }
 
+static ExifTagType updateDataType(const ExifTagType &dataType, const QVariant &value, const MicroExif::Version &ver)
+{
+    if (dataType != ExifTagType::Utf8)
+        return dataType;
+
+    if (ver == MicroExif::V2)
+        return ExifTagType::Ascii;
+
+    // Note that in EXIF specs, UTF-8 is backward compatible with ASCII: all UTF-8 tags can also be ASCII.
+    // To maximize compatibility, I check if the string can be encoded in ASCII.
+    auto txt = value.toString();
+
+    // Exif ASCII data type allow only values up to 127 (7-bit ASCII).
+    auto u8 = txt.toUtf8();
+    for (auto &&c : u8) {
+        if (uchar(c) > 127)
+            return dataType;
+    }
+
+    return ExifTagType::Ascii;
+}
+
 /*!
  * \brief writeIfd
  * \param ds The stream.
@@ -375,7 +398,12 @@ static void writeData(QDataStream &ds, const QVariant &value, const ExifTagType&
  * \param knownTags List of known and supported tags.
  * \return True on success, otherwise false.
  */
-static bool writeIfd(QDataStream &ds, const MicroExif::Tags &tags, TagPos &positions, quint32 pos = 0, const KnownTags &knownTags = staticTagTypes)
+static bool writeIfd(QDataStream &ds,
+                     const MicroExif::Version &ver,
+                     const MicroExif::Tags &tags,
+                     TagPos &positions,
+                     quint32 pos = 0,
+                     const KnownTags &knownTags = staticTagTypes)
 {
     if (tags.isEmpty())
         return true;
@@ -390,7 +418,7 @@ static bool writeIfd(QDataStream &ds, const MicroExif::Tags &tags, TagPos &posit
             continue;
         }
         auto value = tags.value(key);
-        auto dataType = knownTags.value(key);
+        auto dataType = updateDataType(knownTags.value(key), value, ver);
         auto count = countBytes(dataType, value);
 
         ds << quint16(key);
@@ -412,9 +440,8 @@ static bool writeIfd(QDataStream &ds, const MicroExif::Tags &tags, TagPos &posit
         if (!knownTags.contains(key)) {
             continue;
         }
-
         auto value = tags.value(key);
-        auto dataType = knownTags.value(key);
+        auto dataType = updateDataType(knownTags.value(key), value, ver);
         auto count = countBytes(dataType, value);
         auto valueSize = count * EXIF_TAG_SIZEOF(dataType);
         if (valueSize <= 4)
@@ -534,8 +561,16 @@ static bool readIfd(QDataStream &ds, MicroExif::Tags &tags, quint32 pos = 0, con
 
         if (dataType == EXIF_TAG_DATATYPE(ExifTagType::Ascii) || dataType == EXIF_TAG_DATATYPE(ExifTagType::Utf8)) {
             auto l = readBytes(ds, count, true);
-            if (!l.isEmpty())
-                tags.insert(tagId, dataType == EXIF_TAG_DATATYPE(ExifTagType::Utf8) ? QString::fromUtf8(l) : QString::fromLatin1(l));
+            if (!l.isEmpty()) {
+                // It seems that converting to Latin 1 never detects errors so, using UTF-8.
+                // Note that if the dataType is ASCII, by EXIF specification, it must use only the
+                // first 128 values ​​so the UTF-8 conversion is correct.
+                auto dec = QStringDecoder(QStringDecoder::Utf8);
+                // QStringDecoder raise an error only after converting to QString
+                auto ut8 = QString(dec(l));
+                // If there are errors in the conversion to UTF-8, then I try with latin1 (extended ASCII)
+                tags.insert(tagId, dec.hasError() ? QString::fromLatin1(l) : ut8);
+            }
         } else if (dataType == EXIF_TAG_DATATYPE(ExifTagType::Undefined)) {
             auto l = readBytes(ds, count, false);
             if (!l.isEmpty())
@@ -1032,7 +1067,7 @@ void MicroExif::setImageDirection(double degree, bool isMagnetic)
     m_gpsTags.insert(GPS_IMGDIRECTION, degree);
 }
 
-QByteArray MicroExif::toByteArray(const QDataStream::ByteOrder &byteOrder) const
+QByteArray MicroExif::toByteArray(const QDataStream::ByteOrder &byteOrder, const Version &version) const
 {
     QByteArray ba;
     {
@@ -1043,16 +1078,16 @@ QByteArray MicroExif::toByteArray(const QDataStream::ByteOrder &byteOrder) const
     return ba;
 }
 
-QByteArray MicroExif::exifIfdByteArray(const QDataStream::ByteOrder &byteOrder) const
+QByteArray MicroExif::exifIfdByteArray(const QDataStream::ByteOrder &byteOrder, const Version &version) const
 {
     QByteArray ba;
     {
         QDataStream ds(&ba, QIODevice::WriteOnly);
         ds.setByteOrder(byteOrder);
         auto exifTags = m_exifTags;
-        exifTags.insert(EXIF_EXIFVERSION, QByteArray("0300"));
+        exifTags.insert(EXIF_EXIFVERSION, version == Version::V3 ? QByteArray("0300") : QByteArray("0232"));
         TagPos positions;
-        if (!writeIfd(ds, exifTags, positions))
+        if (!writeIfd(ds, version, exifTags, positions))
             return {};
     }
     return ba;
@@ -1065,7 +1100,7 @@ bool MicroExif::setExifIfdByteArray(const QByteArray &ba, const QDataStream::Byt
     return readIfd(ds, m_exifTags, 0, staticTagTypes);
 }
 
-QByteArray MicroExif::gpsIfdByteArray(const QDataStream::ByteOrder &byteOrder) const
+QByteArray MicroExif::gpsIfdByteArray(const QDataStream::ByteOrder &byteOrder, const Version &version) const
 {
     QByteArray ba;
     {
@@ -1074,7 +1109,7 @@ QByteArray MicroExif::gpsIfdByteArray(const QDataStream::ByteOrder &byteOrder) c
         auto gpsTags = m_gpsTags;
         gpsTags.insert(GPS_GPSVERSION, QByteArray("2400"));
         TagPos positions;
-        if (!writeIfd(ds, gpsTags, positions, 0, staticGpsTagTypes))
+        if (!writeIfd(ds, version, gpsTags, positions, 0, staticGpsTagTypes))
             return {};
         return ba;
     }
@@ -1087,7 +1122,7 @@ bool MicroExif::setGpsIfdByteArray(const QByteArray &ba, const QDataStream::Byte
     return readIfd(ds, m_gpsTags, 0, staticGpsTagTypes);
 }
 
-bool MicroExif::write(QIODevice *device, const QDataStream::ByteOrder &byteOrder) const
+bool MicroExif::write(QIODevice *device, const QDataStream::ByteOrder &byteOrder, const Version &version) const
 {
     if (device == nullptr || device->isSequential() || isEmpty())
         return false;
@@ -1096,7 +1131,7 @@ bool MicroExif::write(QIODevice *device, const QDataStream::ByteOrder &byteOrder
         ds.setByteOrder(byteOrder);
         if (!writeHeader(ds))
             return false;
-        if (!writeIfds(ds))
+        if (!writeIfds(ds, version))
             return false;
     }
     device->close();
@@ -1327,30 +1362,30 @@ bool MicroExif::writeHeader(QDataStream &ds) const
     return ds.status() ==  QDataStream::Ok;
 }
 
-bool MicroExif::writeIfds(QDataStream &ds) const
+bool MicroExif::writeIfds(QDataStream &ds, const Version &version) const
 {
     auto tiffTags = m_tiffTags;
     auto exifTags = m_exifTags;
     auto gpsTags = m_gpsTags;
-    updateTags(tiffTags, exifTags, gpsTags);
+    updateTags(tiffTags, exifTags, gpsTags, version);
 
     TagPos positions;
-    if (!writeIfd(ds, tiffTags, positions))
+    if (!writeIfd(ds, version, tiffTags, positions))
         return false;
-    if (!writeIfd(ds, exifTags, positions, positions.value(EXIF_EXIFIFD)))
+    if (!writeIfd(ds, version, exifTags, positions, positions.value(EXIF_EXIFIFD)))
         return false;
-    if (!writeIfd(ds, gpsTags, positions, positions.value(EXIF_GPSIFD), staticGpsTagTypes))
+    if (!writeIfd(ds, version, gpsTags, positions, positions.value(EXIF_GPSIFD), staticGpsTagTypes))
         return false;
     return true;
 }
 
-void MicroExif::updateTags(Tags &tiffTags, Tags &exifTags, Tags &gpsTags) const
+void MicroExif::updateTags(Tags &tiffTags, Tags &exifTags, Tags &gpsTags, const Version &version) const
 {
     if (exifTags.isEmpty()) {
         tiffTags.remove(EXIF_EXIFIFD);
     } else {
         tiffTags.insert(EXIF_EXIFIFD, quint32());
-        exifTags.insert(EXIF_EXIFVERSION, QByteArray("0300"));
+        exifTags.insert(EXIF_EXIFVERSION, version == Version::V3 ? QByteArray("0300") : QByteArray("0232"));
     }
     if (gpsTags.isEmpty()) {
         tiffTags.remove(EXIF_GPSIFD);

src/imageformats/microexif_p.h

@@ -37,6 +37,15 @@ class MicroExif
 public:
     using Tags = QMap<quint16, QVariant>;
 
+    /*!
+     * \brief The Version enum
+     * Exif specs version used when writing.
+     */
+    enum Version {
+        V2, // V2.xx
+        V3 // V3.xx, use of UTF-8 data type (default)
+    };
+
     /*!
      * \brief MicroExif
      * Constructs an empty class.
@@ -265,18 +274,20 @@ public:
      * - EXIF IFD
      * - GPS IFD
      * \param byteOrder Sets the serialization byte order for EXIF data.
+     * \param version The EXIF specs version to use.
      * \return A byte array containing the serialized data.
      * \sa write
      */
-    QByteArray toByteArray(const QDataStream::ByteOrder &byteOrder = EXIF_DEFAULT_BYTEORDER) const;
+    QByteArray toByteArray(const QDataStream::ByteOrder &byteOrder = EXIF_DEFAULT_BYTEORDER, const Version &version = Version::V3) const;
 
     /*!
      * \brief exifIfdByteArray
      * Convert the EXIF IFD only to RAW data. Useful when you want to add EXIF data to an existing TIFF container.
      * \param byteOrder Sets the serialization byte order for the data.
+     * \param version The EXIF specs version to use.
      * \return A byte array containing the serialized data.
      */
-    QByteArray exifIfdByteArray(const QDataStream::ByteOrder &byteOrder = EXIF_DEFAULT_BYTEORDER) const;
+    QByteArray exifIfdByteArray(const QDataStream::ByteOrder &byteOrder = EXIF_DEFAULT_BYTEORDER, const Version &version = Version::V3) const;
     /*!
      * \brief setExifIfdByteArray
      * \param ba The RAW data of EXIF IFD.
@@ -289,9 +300,10 @@ public:
      * \brief gpsIfdByteArray
      * Convert the GPS IFD only to RAW data. Useful when you want to add GPS data to an existing TIFF container.
      * \param byteOrder Sets the serialization byte order for the data.
+     * \param version The EXIF specs version to use.
      * \return A byte array containing the serialized data.
      */
-    QByteArray gpsIfdByteArray(const QDataStream::ByteOrder &byteOrder = EXIF_DEFAULT_BYTEORDER) const;
+    QByteArray gpsIfdByteArray(const QDataStream::ByteOrder &byteOrder = EXIF_DEFAULT_BYTEORDER, const Version &version = Version::V3) const;
     /*!
      * \brief setGpsIfdByteArray
      * \param ba The RAW data of GPS IFD.
@@ -309,10 +321,11 @@ public:
      * - GPS IFD
      * \param device A random access device.
      * \param byteOrder Sets the serialization byte order for EXIF data.
+     * \param version The EXIF specs version to use.
      * \return True on success, otherwise false.
      * \sa toByteArray
      */
-    bool write(QIODevice *device, const QDataStream::ByteOrder &byteOrder = EXIF_DEFAULT_BYTEORDER) const;
+    bool write(QIODevice *device, const QDataStream::ByteOrder &byteOrder = EXIF_DEFAULT_BYTEORDER, const Version &version = Version::V3) const;
 
     /*!
      * \brief updateImageMetadata
@@ -373,8 +386,8 @@ private:
     void setGpsString(quint16 tagId, const QString& s);
     QString gpsString(quint16 tagId) const;
     bool writeHeader(QDataStream &ds) const;
-    bool writeIfds(QDataStream &ds) const;
-    void updateTags(Tags &tiffTags, Tags &exifTags, Tags &gpsTags) const;
+    bool writeIfds(QDataStream &ds, const Version &version) const;
+    void updateTags(Tags &tiffTags, Tags &exifTags, Tags &gpsTags, const Version &version) const;
 
     static void setString(Tags &tags, quint16 tagId, const QString &s);
     static QString string(const Tags &tags, quint16 tagId);

src/imageformats/psd.cpp

@@ -1504,7 +1504,18 @@ bool PSDHandler::read(QImage *image)
         img.setColorSpace(QColorSpace(QColorSpace::SRgb));
 #endif
     } else if (!setColorSpace(img, irs)) {
-        // qDebug() << "No colorspace info set!";
+        // Float images are used by Photoshop as linear: if no color space
+        // is present, a linear one should be chosen.
+        if (header.color_mode == CM_RGB && header.depth == 32) {
+            img.setColorSpace(QColorSpace(QColorSpace::SRgbLinear));
+        }
+#if QT_VERSION >= QT_VERSION_CHECK(6, 8, 0)
+        if (header.color_mode == CM_GRAYSCALE && header.depth == 32) {
+            auto qs = QColorSpace(QPointF(0.3127, 0.3291), QColorSpace::TransferFunction::Linear);
+            qs.setDescription(QStringLiteral("Linear grayscale"));
+            img.setColorSpace(qs);
+        }
+#endif
     }
 
     // XMP data

src/imageformats/sct.cpp

@@ -457,3 +457,4 @@ QImageIOHandler *ScitexPlugin::create(QIODevice *device, const QByteArray &forma
     return handler;
 }
 
+#include "moc_sct_p.cpp"

src/imageformats/xcf.cpp

@@ -962,11 +962,7 @@ bool XCFImageFormat::loadImageProperties(QDataStream &xcf_io, XCFImage &xcf_imag
         case PROP_PARASITES:
             while (!property.atEnd()) {
                 char *tag;
-#if QT_VERSION < QT_VERSION_CHECK(6, 7, 0)
-                quint32 size;
-#else
                 qint64 size;
-#endif
 
                 property.readBytes(tag, size);