From d2306d74850986692c02b70df0d7a6a6e933d0dc Mon Sep 17 00:00:00 2001
From: Sandro Mani <manisandro@gmail.com>
Date: Sun, 1 Jan 2017 23:49:35 +0100
Subject: Add support for multipage TIFF images to QTiffHandler

Allows multipage TIFF images to be read via QImageReader::jumpToImage
and QImageReader::jumpNextToImage.

[ChangeLog][QtGui][QImageReader] Support multipage TIFF images through
QImageReader

Change-Id: Id6ac68b75500148e51be11eff3d296c929d2d95c
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
---
 tests/auto/tiff/tst_qtiff.cpp           |  44 ++++++++++++++++++++++++++++++++
 tests/shared/images/tiff.qrc            |   1 +
 tests/shared/images/tiff/multipage.tiff | Bin 0 -> 20238 bytes
 3 files changed, 45 insertions(+)
 create mode 100644 tests/shared/images/tiff/multipage.tiff

(limited to 'tests')

diff --git a/tests/auto/tiff/tst_qtiff.cpp b/tests/auto/tiff/tst_qtiff.cpp
index 8e3d0c9..65cc56c 100644
--- a/tests/auto/tiff/tst_qtiff.cpp
+++ b/tests/auto/tiff/tst_qtiff.cpp
@@ -78,6 +78,9 @@ private slots:
     void resolution_data();
     void resolution();
 
+    void multipage_data();
+    void multipage();
+
 private:
     QString prefix;
 };
@@ -513,5 +516,46 @@ void tst_qtiff::resolution()
     QCOMPARE(expectedDotsPerMeterY, generatedImage.dotsPerMeterY());
 }
 
+void tst_qtiff::multipage_data()
+{
+    QTest::addColumn<QString>("filename");
+    QTest::addColumn<int>("expectedNumPages");
+    QTest::addColumn<QVector<QSize>>("expectedSizes");
+
+    QVector<QSize> sizes = QVector<QSize>() << QSize(640, 480) << QSize(800, 600) << QSize(320, 240);
+    QTest::newRow("3 page TIFF") << ("multipage.tiff") << 3 << sizes;
+}
+
+void tst_qtiff::multipage()
+{
+    QFETCH(QString, filename);
+    QFETCH(int, expectedNumPages);
+    QFETCH(QVector<QSize>, expectedSizes);
+
+    QImageReader reader(prefix + filename);
+    QCOMPARE(reader.imageCount(), expectedNumPages);
+
+    // Test jumpToImage, currentImageNumber and whether the actual image is correct
+    QCOMPARE(reader.jumpToImage(-1), false);
+    for (int i = 0; i < expectedNumPages; ++i) {
+        reader.jumpToImage(i);
+        QCOMPARE(reader.currentImageNumber(), i);
+        QSize size = reader.size();
+        QCOMPARE(size.width(), expectedSizes[i].width());
+        QCOMPARE(size.height(), expectedSizes[i].height());
+        QImage image = reader.read();
+        QVERIFY2(!image.isNull(), qPrintable(reader.errorString()));
+    }
+    QCOMPARE(reader.jumpToImage(expectedNumPages), false);
+
+    // Test jumpToNextImage
+    reader.jumpToImage(0);
+    QCOMPARE(reader.currentImageNumber(), 0);
+    for (int i = 0; i < expectedNumPages - 1; ++i) {
+        QCOMPARE(reader.jumpToNextImage(), true);
+    }
+    QCOMPARE(reader.jumpToNextImage(), false);
+}
+
 QTEST_MAIN(tst_qtiff)
 #include "tst_qtiff.moc"
diff --git a/tests/shared/images/tiff.qrc b/tests/shared/images/tiff.qrc
index 8fcab8b..c98a72c 100644
--- a/tests/shared/images/tiff.qrc
+++ b/tests/shared/images/tiff.qrc
@@ -21,6 +21,7 @@
         <file>tiff/mono_orientation_6.tiff</file>
         <file>tiff/mono_orientation_7.tiff</file>
         <file>tiff/mono_orientation_8.tiff</file>
+        <file>tiff/multipage.tiff</file>
         <file>tiff/original_indexed.tiff</file>
         <file>tiff/original_mono.tiff</file>
         <file>tiff/original_rgb.tiff</file>
diff --git a/tests/shared/images/tiff/multipage.tiff b/tests/shared/images/tiff/multipage.tiff
new file mode 100644
index 0000000..0c2f266
Binary files /dev/null and b/tests/shared/images/tiff/multipage.tiff differ
-- 
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