Heic handler: fix orientation and other image properties

The mac heic handler lacked support for any meta-data i/o. Most
notably, the image orientation proprty was ignored, so images read in
could be wrongly oriented.

Fixes: QTBUG-73415
Change-Id: I779f91dc28c7441b124aab4557e1abcd3e69fde9
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>

3 files changed, 80 insertions, 1 deletions

diff --git a/tests/auto/heif/tst_qheif.cpp b/tests/auto/heif/tst_qheif.cpp
index faf22fa..26ddf73 100644
--- a/tests/auto/heif/tst_qheif.cpp
+++ b/tests/auto/heif/tst_qheif.cpp
@@ -37,6 +37,9 @@ private slots:
     void initTestCase();
     void readImage_data();
     void readImage();
+    void readProperties_data();
+    void readProperties();
+    void writeImage();
 };
 
 void tst_qheif::initTestCase()
@@ -49,8 +52,10 @@ void tst_qheif::readImage_data()
 {
     QTest::addColumn<QString>("fileName");
     QTest::addColumn<QSize>("size");
+    QTest::addColumn<int>("transform");
 
-    QTest::newRow("col") << QString("col320x480.heic") << QSize(320, 480);
+    QTest::newRow("col") << QString("col320x480.heic") << QSize(320, 480) << int(QImageIOHandler::TransformationNone);
+    QTest::newRow("rot") << QString("newlogoCCW.heic") << QSize(110, 78) << int(QImageIOHandler::TransformationRotate90);
 }
 
 void tst_qheif::readImage()
@@ -66,5 +71,78 @@ void tst_qheif::readImage()
     QCOMPARE(image.size(), size);
 }
 
+void tst_qheif::readProperties_data()
+{
+    readImage_data();
+}
+
+void tst_qheif::readProperties()
+{
+    QFETCH(QString, fileName);
+    QFETCH(QSize, size);
+    QFETCH(int, transform);
+
+    QSize rawSize = (transform & QImageIOHandler::TransformationRotate90) ? size.transposed() : size;
+
+    QString path = QStringLiteral(":/heif/") + fileName;
+    QImageReader reader(path);
+    QCOMPARE(reader.size(), rawSize);
+    QCOMPARE(int(reader.transformation()), transform);
+
+    QImage image = reader.read();
+    QCOMPARE(image.size(), size);
+
+    QCOMPARE(reader.size(), rawSize);
+    QCOMPARE(int(reader.transformation()), transform);
+}
+
+void tst_qheif::writeImage()
+{
+    QImage img(20, 10, QImage::Format_ARGB32_Premultiplied);
+    img.fill(Qt::green);
+
+    QBuffer buf1, buf2;
+    QImage rimg1;
+
+    {
+        buf1.open(QIODevice::WriteOnly);
+        QImageWriter writer(&buf1, "heic");
+        QVERIFY(writer.write(img));
+        buf1.close();
+        QVERIFY(buf1.size() > 0);
+
+        buf1.open(QIODevice::ReadOnly);
+        QImageReader reader(&buf1);
+        QVERIFY(reader.read(&rimg1));
+        buf1.close();
+        QVERIFY(rimg1.size() == img.size());
+    }
+
+    {
+        buf2.open(QIODevice::WriteOnly);
+        QImageWriter writer(&buf2, "heic");
+        writer.setQuality(20);
+        QVERIFY(writer.write(img));
+        buf2.close();
+        QVERIFY(buf2.size() > 0);
+        QVERIFY(buf2.size() < buf1.size());
+    }
+
+    {
+        buf2.open(QIODevice::WriteOnly);
+        QImageWriter writer(&buf2, "heic");
+        writer.setTransformation(QImageIOHandler::TransformationRotate270);
+        QVERIFY(writer.write(img));
+        buf2.close();
+
+        QImage rimg2;
+        buf2.open(QIODevice::ReadOnly);
+        QImageReader reader(&buf2);
+        QVERIFY(reader.read(&rimg2));
+        buf2.close();
+        QVERIFY(rimg2.size() == img.size().transposed());
+    }
+}
+
 QTEST_MAIN(tst_qheif)
 #include "tst_qheif.moc"
diff --git a/tests/shared/images/heif.qrc b/tests/shared/images/heif.qrc
index 2a41c36..8232b6a 100644
--- a/tests/shared/images/heif.qrc
+++ b/tests/shared/images/heif.qrc
@@ -1,5 +1,6 @@
 <RCC>
     <qresource prefix="/">
         <file>heif/col320x480.heic</file>
+        <file>heif/newlogoCCW.heic</file>
     </qresource>
 </RCC>
diff --git a/tests/shared/images/heif/newlogoCCW.heic b/tests/shared/images/heif/newlogoCCW.heic
new file mode 100644
index 0000000..1604947
--- /dev/null
+++ b/tests/shared/images/heif/newlogoCCW.heic