diff --git a/plugins/impex/heif/HeifExport.cpp b/plugins/impex/heif/HeifExport.cpp
index 3c9fae1736..2f4629fc95 100644
--- a/plugins/impex/heif/HeifExport.cpp
+++ b/plugins/impex/heif/HeifExport.cpp
@@ -1,269 +1,269 @@
 /*
  *  Copyright (c) 2018 Dirk Farin <farin@struktur.de>
  *
  *  This program is free software; you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation; either version 2 of the License, or
  *  (at your option) any later version.
  *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
  *
  *  You should have received a copy of the GNU General Public License
  *  along with this program; if not, write to the Free Software
  *  Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "HeifExport.h"
 #include "HeifError.h"
 
 #include <QCheckBox>
 #include <QSlider>
 #include <QApplication>
 #include <QScopedPointer>
 #include <QBuffer>
 
 #include <kpluginfactory.h>
 #include <QFileInfo>
 
 #include <KoColorSpaceRegistry.h>
 #include <KoColorSpaceConstants.h>
 #include <KoColorModelStandardIds.h>
 
 #include <KisImportExportManager.h>
 #include <KisExportCheckRegistry.h>
 
 #include <kis_properties_configuration.h>
 #include <kis_config.h>
 #include <KisDocument.h>
 #include <kis_image.h>
 #include <kis_group_layer.h>
 #include <kis_paint_device.h>
 #include <kis_paint_layer.h>
 
 #include <metadata/kis_meta_data_store.h>
 #include <metadata/kis_meta_data_entry.h>
 #include <metadata/kis_meta_data_value.h>
 #include <metadata/kis_meta_data_schema.h>
 #include <metadata/kis_meta_data_schema_registry.h>
 #include <metadata/kis_meta_data_filter_registry_model.h>
 #include <metadata/kis_exif_info_visitor.h>
 #include <metadata/kis_meta_data_io_backend.h>
 
 #include "kis_iterator_ng.h"
 
 #include "libheif/heif-cxx.h"
 
 
 class KisExternalLayer;
 
 K_PLUGIN_FACTORY_WITH_JSON(ExportFactory, "krita_heif_export.json", registerPlugin<HeifExport>();)
 
 HeifExport::HeifExport(QObject *parent, const QVariantList &) : KisImportExportFilter(parent)
 {
 }
 
 HeifExport::~HeifExport()
 {
 }
 
 KisPropertiesConfigurationSP HeifExport::defaultConfiguration(const QByteArray &/*from*/, const QByteArray &/*to*/) const
 {
     KisPropertiesConfigurationSP cfg = new KisPropertiesConfiguration();
     cfg->setProperty("quality", 50);
     cfg->setProperty("lossless", true);
     return cfg;
 }
 
 KisConfigWidget *HeifExport::createConfigurationWidget(QWidget *parent, const QByteArray &/*from*/, const QByteArray &/*to*/) const
 {
     return new KisWdgOptionsHeif(parent);
 }
 
 
 
 class Writer_QIODevice : public heif::Context::Writer
 {
 public:
     Writer_QIODevice(QIODevice* io)
         : m_io(io)
     {
     }
 
-    heif_error write(heif::Context&, const void* data, size_t size) override {
+    heif_error write(const void* data, size_t size) override {
         qint64 n = m_io->write((const char*)data,size);
         if (n != (qint64)size) {
             QString error = m_io->errorString();
 
             heif_error err = {
                 heif_error_Encoding_error,
                 heif_suberror_Cannot_write_output_data,
                 "Could not write output data" };
 
             return err;
         }
 
         struct heif_error heif_error_ok = { heif_error_Ok, heif_suberror_Unspecified, "Success" };
         return heif_error_ok;
     }
 
 private:
     QIODevice* m_io;
 };
 
 
 KisImportExportFilter::ConversionStatus HeifExport::convert(KisDocument *document, QIODevice *io,  KisPropertiesConfigurationSP configuration)
 {
     KisImageSP image = document->savingImage();
     const KoColorSpace *cs = image->colorSpace();
 
     // Convert to 8 bits rgba on saving
     if (cs->colorModelId() != RGBAColorModelID || cs->colorDepthId() != Integer8BitsColorDepthID) {
         cs = KoColorSpaceRegistry::instance()->colorSpace(RGBAColorModelID.id(), Integer8BitsColorDepthID.id());
         image->convertImageColorSpace(cs, KoColorConversionTransformation::internalRenderingIntent(), KoColorConversionTransformation::internalConversionFlags());
     }
 
     int quality = configuration->getInt("quality", 50);
     bool lossless = configuration->getBool("lossless", false);
 
     bool has_alpha = configuration->getBool(KisImportExportFilter::ImageContainsTransparencyTag, false);
 
     KisExifInfoVisitor exivInfoVisitor;
     exivInfoVisitor.visit(image->rootLayer().data());
 
     QScopedPointer<KisMetaData::Store> metaDataStore;
     if (exivInfoVisitor.metaDataCount() == 1) {
         metaDataStore.reset(new KisMetaData::Store(*exivInfoVisitor.exifInfo()));
     }
     else {
         metaDataStore.reset(new KisMetaData::Store());
     }
 
     if (!metaDataStore->empty()) {
         {
             KisMetaData::IOBackend* exifIO = KisMetaData::IOBackendRegistry::instance()->value("exif");
             QBuffer buffer;
             exifIO->saveTo(metaDataStore.data(), &buffer, KisMetaData::IOBackend::NoHeader); // Or JpegHeader? Or something else?
             QByteArray data = buffer.data();
             // Write the data to the file
         }
         {
             KisMetaData::IOBackend* xmpIO = KisMetaData::IOBackendRegistry::instance()->value("xmp");
             QBuffer buffer;
             xmpIO->saveTo(metaDataStore.data(), &buffer, KisMetaData::IOBackend::NoHeader); // Or JpegHeader? Or something else?
             QByteArray data = buffer.data();
             // Write the data to the file
         }
     }
 
     // If we want to add information from the document to the metadata,
     // we should do that here.
 
     try {
         // --- use standard HEVC encoder
 
         heif::Encoder encoder(heif_compression_HEVC);
 
         encoder.set_lossy_quality(quality);
         encoder.set_lossless(lossless);
 
 
         // --- convert KisImage to HEIF image ---
         int width = image->width();
         int height = image->height();
 
         heif::Context ctx;
 
         heif::Image img;
         img.create(width,height, heif_colorspace_RGB, heif_chroma_444);
         img.add_plane(heif_channel_R, width,height, 8);
         img.add_plane(heif_channel_G, width,height, 8);
         img.add_plane(heif_channel_B, width,height, 8);
 
         uint8_t* ptrR {0};
         uint8_t* ptrG {0};
         uint8_t* ptrB {0};
         uint8_t* ptrA {0};
         int strideR,strideG,strideB,strideA;
 
         ptrR = img.get_plane(heif_channel_R, &strideR);
         ptrG = img.get_plane(heif_channel_G, &strideG);
         ptrB = img.get_plane(heif_channel_B, &strideB);
 
         if (has_alpha) {
             img.add_plane(heif_channel_Alpha, width,height, 8);
             ptrA = img.get_plane(heif_channel_Alpha, &strideA);
         }
 
         KisPaintDeviceSP pd = image->projection();
 
         for (int y=0; y<height; y++) {
             KisHLineIteratorSP it = pd->createHLineIteratorNG(0, y, width);
 
             for (int x=0; x<width; x++) {
                 ptrR[y*strideR+x] = KoBgrTraits<quint8>::red(it->rawData());
                 ptrG[y*strideG+x] = KoBgrTraits<quint8>::green(it->rawData());
                 ptrB[y*strideB+x] = KoBgrTraits<quint8>::blue(it->rawData());
 
                 if (has_alpha) {
                     ptrA[y*strideA+x] = cs->opacityU8(it->rawData());
                 }
 
                 it->nextPixel();
             }
         }
 
         // --- encode and write image
 
         ctx.encode_image(img, encoder);
 
         Writer_QIODevice writer(io);
 
         ctx.write(writer);
     }
     catch (heif::Error err) {
         return setHeifError(document, err);
     }
 
     return KisImportExportFilter::OK;
 }
 
 void HeifExport::initializeCapabilities()
 {
     // This checks before saving for what the file format supports: anything that is supported needs to be mentioned here
 
     QList<QPair<KoID, KoID> > supportedColorModels;
     supportedColorModels << QPair<KoID, KoID>()
             << QPair<KoID, KoID>(RGBAColorModelID, Integer8BitsColorDepthID)
             /*<< QPair<KoID, KoID>(GrayAColorModelID, Integer8BitsColorDepthID)
                     << QPair<KoID, KoID>(RGBAColorModelID, Integer16BitsColorDepthID)
                     << QPair<KoID, KoID>(GrayAColorModelID, Integer16BitsColorDepthID)*/
             ;
     addSupportedColorModels(supportedColorModels, "HEIF");
 }
 
 
 void KisWdgOptionsHeif::setConfiguration(const KisPropertiesConfigurationSP cfg)
 {
     chkLossless->setChecked(cfg->getBool("lossless", true));
     sliderQuality->setValue(cfg->getInt("quality", 50));
 }
 
 KisPropertiesConfigurationSP KisWdgOptionsHeif::configuration() const
 {
     KisPropertiesConfigurationSP cfg = new KisPropertiesConfiguration();
     cfg->setProperty("lossless", chkLossless->isChecked());
     cfg->setProperty("quality", sliderQuality->value());
     return cfg;
 }
 
 void KisWdgOptionsHeif::toggleQualitySlider(bool toggle)
 {
     // Disable the quality slider if lossless is true
     sliderQuality->setEnabled(!toggle);
 }
 
 #include <HeifExport.moc>