Add support for the orientation of tiff images

The orientation tag was ignored for tiff images. The tag is now used
to rotate the image before providing it to the user.

The orientation of indexed an mono images is done completely manually.

The orientation of other type is done in conjunction to the mirroring
already performed by libtiff.

Task-number: 258526
Reviewed-by: Samuel Rødal

1 files changed, 45 insertions, 0 deletions

diff --git a/tests/auto/qimagereader/tst_qimagereader.cpp b/tests/auto/qimagereader/tst_qimagereader.cpp
index dad771b24b..ba3d83e379 100644
--- a/tests/auto/qimagereader/tst_qimagereader.cpp
+++ b/tests/auto/qimagereader/tst_qimagereader.cpp
@@ -149,6 +149,9 @@ private slots:
     void tiffCompression_data();
     void tiffCompression();
     void tiffEndianness();
+
+    void tiffOrientation_data();
+    void tiffOrientation();
 #endif
 
     void autoDetectImageFormat();
@@ -1308,6 +1311,48 @@ void tst_QImageReader::tiffEndianness()
     QCOMPARE(littleEndian, bigEndian);
 }
 
+void tst_QImageReader::tiffOrientation_data()
+{
+    QTest::addColumn<QString>("expected");
+    QTest::addColumn<QString>("oriented");
+    QTest::newRow("Indexed TIFF, orientation1") << "tiff_oriented/original_indexed.tiff" << "tiff_oriented/indexed_orientation_1.tiff";
+    QTest::newRow("Indexed TIFF, orientation2") << "tiff_oriented/original_indexed.tiff" << "tiff_oriented/indexed_orientation_2.tiff";
+    QTest::newRow("Indexed TIFF, orientation3") << "tiff_oriented/original_indexed.tiff" << "tiff_oriented/indexed_orientation_3.tiff";
+    QTest::newRow("Indexed TIFF, orientation4") << "tiff_oriented/original_indexed.tiff" << "tiff_oriented/indexed_orientation_4.tiff";
+    QTest::newRow("Indexed TIFF, orientation5") << "tiff_oriented/original_indexed.tiff" << "tiff_oriented/indexed_orientation_5.tiff";
+    QTest::newRow("Indexed TIFF, orientation6") << "tiff_oriented/original_indexed.tiff" << "tiff_oriented/indexed_orientation_6.tiff";
+    QTest::newRow("Indexed TIFF, orientation7") << "tiff_oriented/original_indexed.tiff" << "tiff_oriented/indexed_orientation_7.tiff";
+    QTest::newRow("Indexed TIFF, orientation8") << "tiff_oriented/original_indexed.tiff" << "tiff_oriented/indexed_orientation_8.tiff";
+
+    QTest::newRow("Mono TIFF, orientation1") << "tiff_oriented/original_mono.tiff" << "tiff_oriented/mono_orientation_1.tiff";
+    QTest::newRow("Mono TIFF, orientation2") << "tiff_oriented/original_mono.tiff" << "tiff_oriented/mono_orientation_2.tiff";
+    QTest::newRow("Mono TIFF, orientation3") << "tiff_oriented/original_mono.tiff" << "tiff_oriented/mono_orientation_3.tiff";
+    QTest::newRow("Mono TIFF, orientation4") << "tiff_oriented/original_mono.tiff" << "tiff_oriented/mono_orientation_4.tiff";
+    QTest::newRow("Mono TIFF, orientation5") << "tiff_oriented/original_mono.tiff" << "tiff_oriented/mono_orientation_5.tiff";
+    QTest::newRow("Mono TIFF, orientation6") << "tiff_oriented/original_mono.tiff" << "tiff_oriented/mono_orientation_6.tiff";
+    QTest::newRow("Mono TIFF, orientation7") << "tiff_oriented/original_mono.tiff" << "tiff_oriented/mono_orientation_7.tiff";
+    QTest::newRow("Mono TIFF, orientation8") << "tiff_oriented/original_mono.tiff" << "tiff_oriented/mono_orientation_8.tiff";
+
+    QTest::newRow("RGB TIFF, orientation1") << "tiff_oriented/original_rgb.tiff" << "tiff_oriented/rgb_orientation_1.tiff";
+    QTest::newRow("RGB TIFF, orientation2") << "tiff_oriented/original_rgb.tiff" << "tiff_oriented/rgb_orientation_2.tiff";
+    QTest::newRow("RGB TIFF, orientation3") << "tiff_oriented/original_rgb.tiff" << "tiff_oriented/rgb_orientation_3.tiff";
+    QTest::newRow("RGB TIFF, orientation4") << "tiff_oriented/original_rgb.tiff" << "tiff_oriented/rgb_orientation_4.tiff";
+    QTest::newRow("RGB TIFF, orientation5") << "tiff_oriented/original_rgb.tiff" << "tiff_oriented/rgb_orientation_5.tiff";
+    QTest::newRow("RGB TIFF, orientation6") << "tiff_oriented/original_rgb.tiff" << "tiff_oriented/rgb_orientation_6.tiff";
+    QTest::newRow("RGB TIFF, orientation7") << "tiff_oriented/original_rgb.tiff" << "tiff_oriented/rgb_orientation_7.tiff";
+    QTest::newRow("RGB TIFF, orientation8") << "tiff_oriented/original_rgb.tiff" << "tiff_oriented/rgb_orientation_8.tiff";
+}
+
+void tst_QImageReader::tiffOrientation()
+{
+    QFETCH(QString, expected);
+    QFETCH(QString, oriented);
+
+    QImage expectedImage(prefix + expected);
+    QImage orientedImage(prefix + oriented);
+    QCOMPARE(expectedImage, orientedImage);
+}
+
 #endif
 
 void tst_QImageReader::dotsPerMeter_data()