diff --git a/autotests/CMakeLists.txt b/autotests/CMakeLists.txt
--- a/autotests/CMakeLists.txt
+++ b/autotests/CMakeLists.txt
@@ -55,6 +55,7 @@
 # Loads each <format> image in read/<format>/, and compares the
 # result against the data read from the corresponding png file
 kimageformats_read_tests(
+    hdr
     pcx
     psd
     ras
diff --git a/autotests/read/hdr/rgb.hdr b/autotests/read/hdr/rgb.hdr
new file mode 100644
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000
GIT binary patch
literal 0
Hc$@<O00001

literal 0
Hc$@<O00001

diff --git a/autotests/read/hdr/rgb.png b/autotests/read/hdr/rgb.png
new file mode 100644
index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000
GIT binary patch
literal 0
Hc$@<O00001

literal 0
Hc$@<O00001

diff --git a/src/imageformats/CMakeLists.txt b/src/imageformats/CMakeLists.txt
--- a/src/imageformats/CMakeLists.txt
+++ b/src/imageformats/CMakeLists.txt
@@ -53,6 +53,11 @@
 
 ##################################
 
+kimageformats_add_plugin(kimg_hdr JSON "hdr.json" SOURCES hdr.cpp)
+install(FILES hdr.desktop DESTINATION ${KDE_INSTALL_KSERVICES5DIR}/qimageioplugins/)
+
+##################################
+
 kimageformats_add_plugin(kimg_pcx JSON "pcx.json" SOURCES pcx.cpp)
 install(FILES pcx.desktop DESTINATION ${KDE_INSTALL_KSERVICES5DIR}/qimageioplugins/)
 
diff --git a/src/imageformats/hdr.cpp b/src/imageformats/hdr.cpp
--- a/src/imageformats/hdr.cpp
+++ b/src/imageformats/hdr.cpp
@@ -15,7 +15,7 @@
 
 #include <QDebug>
 
-typedef Q_UINT8 uchar;
+typedef unsigned char uchar;
 
 namespace   // Private.
 {
@@ -93,19 +93,22 @@
     uchar val, code;
 
     // Create dst image.
-    if (!img.create(width, height, 32)) {
+    img = QImage(width, height, QImage::Format_RGB32);
+    if (img.isNull()) {
         return false;
     }
 
-    QMemArray<uchar> image(width * 4);
+    QByteArray lineArray;
+    lineArray.resize(4 * width);
+    uchar *image = (uchar *) lineArray.data();
 
     for (int cline = 0; cline < height; cline++) {
         QRgb *scanline = (QRgb *) img.scanLine(cline);
 
         // determine scanline type
         if ((width < MINELEN) || (MAXELEN < width)) {
-            Read_Old_Line(image.data(), width, s);
-            RGBE_To_QRgbLine(image.data(), scanline, width);
+            Read_Old_Line(image, width, s);
+            RGBE_To_QRgbLine(image, scanline, width);
             continue;
         }
 
@@ -116,9 +119,9 @@
         }
 
         if (val != 2) {
-            s.device()->at(s.device()->at() - 1);
-            Read_Old_Line(image.data(), width, s);
-            RGBE_To_QRgbLine(image.data(), scanline, width);
+            s.device()->ungetChar(val);
+            Read_Old_Line(image, width, s);
+            RGBE_To_QRgbLine(image, scanline, width);
             continue;
         }
 
@@ -132,8 +135,8 @@
 
         if ((image[1] != 2) || (image[2] & 128)) {
             image[0] = 2;
-            Read_Old_Line(image.data() + 4, width - 1, s);
-            RGBE_To_QRgbLine(image.data(), scanline, width);
+            Read_Old_Line(image + 4, width - 1, s);
+            RGBE_To_QRgbLine(image, scanline, width);
             continue;
         }
 
@@ -168,24 +171,24 @@
             }
         }
 
-        RGBE_To_QRgbLine(image.data(), scanline, width);
+        RGBE_To_QRgbLine(image, scanline, width);
     }
 
     return true;
 }
 
 } // namespace
 
-Q_DECL_EXPORT void kimgio_hdr_read(QImageIO *io)
+bool HDRHandler::read(QImage *outImage)
 {
     int len;
     char line[MAXLINE];
     //bool validHeader = false;
     bool validFormat = false;
 
     // Parse header
     do {
-        len = io->ioDevice()->readLine(line, MAXLINE);
+        len = device()->readLine(line, MAXLINE);
 
         /*if (strcmp(line, "#?RADIANCE\n") == 0 || strcmp(line, "#?RGBE\n") == 0)
         {
@@ -199,40 +202,78 @@
 
     if (/*!validHeader ||*/ !validFormat) {
         // qDebug() << "Unknown HDR format.";
-        io->setImage(0);
-        io->setStatus(-1);
-        return;
+        return false;
     }
 
-    io->ioDevice()->readLine(line, MAXLINE);
+    device()->readLine(line, MAXLINE);
 
     char s1[3], s2[3];
     int width, height;
     if (sscanf(line, "%2[+-XY] %d %2[+-XY] %d\n", s1, &height, s2, &width) != 4)
         //if( sscanf(line, "-Y %d +X %d", &height, &width) < 2 )
     {
         // qDebug() << "Invalid HDR file.";
-        io->setImage(0);
-        io->setStatus(-1);
-        return;
+        return false;
     }
 
-    QDataStream s(io->ioDevice());
+    QDataStream s(device());
 
     QImage img;
     if (!LoadHDR(s, width, height, img)) {
         // qDebug() << "Error loading HDR file.";
-        io->setImage(0);
-        io->setStatus(-1);
-        return;
+        return false;
+    }
+
+    *outImage = img;
+    return true;
+}
+
+HDRHandler::HDRHandler()
+{
+}
+
+bool HDRHandler::canRead() const
+{
+    if (canRead(device())) {
+        setFormat("hdr");
+        return true;
+    }
+    return false;
+}
+
+bool HDRHandler::canRead(QIODevice *device)
+{
+    if (!device) {
+        qWarning("HDRHandler::canRead() called with no device");
+        return false;
     }
 
-    io->setImage(img);
-    io->setStatus(0);
+    return device->peek(11) == "#?RADIANCE\n" || device->peek(7) == "#?RGBE\n";
 }
 
-Q_DECL_EXPORT void kimgio_hdr_write(QImageIO *)
+QImageIOPlugin::Capabilities HDRPlugin::capabilities(QIODevice *device, const QByteArray &format) const
 {
-    // intentionally not implemented (since writing low dynamic range data to a HDR file is nonsense.)
+    if (format == "hdr") {
+        return Capabilities(CanRead);
+    }
+    if (!format.isEmpty()) {
+        return {};
+    }
+    if (!device->isOpen()) {
+        return {};
+    }
+
+    Capabilities cap;
+    if (device->isReadable() && HDRHandler::canRead(device)) {
+        cap |= CanRead;
+    }
+    return cap;
 }
 
+QImageIOHandler *HDRPlugin::create(QIODevice *device, const QByteArray &format) const
+{
+    QImageIOHandler *handler = new HDRHandler;
+    handler->setDevice(device);
+    handler->setFormat(format);
+    return handler;
+}
diff --git a/src/imageformats/hdr.json b/src/imageformats/hdr.json
new file mode 100644
--- /dev/null
+++ b/src/imageformats/hdr.json
@@ -0,0 +1,4 @@
+{
+    "Keys": [ "hdr" ],
+    "MimeTypes": [ "image/x-hdr", "image/vnd.radiance" ]
+}
diff --git a/src/imageformats/hdr_p.h b/src/imageformats/hdr_p.h
--- a/src/imageformats/hdr_p.h
+++ b/src/imageformats/hdr_p.h
@@ -10,12 +10,27 @@
 #ifndef KIMG_HDR_P_H
 #define KIMG_HDR_P_H
 
-class QImageIO;
+#include <QImageIOPlugin>
 
-extern "C" {
-    void kimgio_hdr_read(QImageIO *);
-    void kimgio_hdr_write(QImageIO *);
-}
+class HDRHandler : public QImageIOHandler
+{
+public:
+    HDRHandler();
 
-#endif
+    bool canRead() const override;
+    bool read(QImage *outImage) override;
 
+    static bool canRead(QIODevice *device);
+};
+
+class HDRPlugin : public QImageIOPlugin
+{
+    Q_OBJECT
+    Q_PLUGIN_METADATA(IID "org.qt-project.Qt.QImageIOHandlerFactoryInterface" FILE "hdr.json")
+
+public:
+    Capabilities capabilities(QIODevice *device, const QByteArray &format) const override;
+    QImageIOHandler *create(QIODevice *device, const QByteArray &format = QByteArray()) const override;
+};
+
+#endif // KIMG_HDR_P_H