Avoid creating copy of an image in memory when storing as png

Task-number: QT-3871
Reviewed-by: Kim

1 files changed, 43 insertions, 0 deletions

diff --git a/tests/auto/qimagereader/tst_qimagereader.cpp b/tests/auto/qimagereader/tst_qimagereader.cpp
index 3bee5d9..4b4bdd6 100644
--- a/tests/auto/qimagereader/tst_qimagereader.cpp
+++ b/tests/auto/qimagereader/tst_qimagereader.cpp
@@ -178,6 +178,8 @@ private slots:
     void testIgnoresFormatAndExtension_data();
     void testIgnoresFormatAndExtension();
 
+    void saveFormat_data();
+    void saveFormat();
 };
 
 static const QLatin1String prefix(SRCDIR "/images/");
@@ -1905,5 +1907,46 @@ void tst_QImageReader::testIgnoresFormatAndExtension()
     }
 }
 
+
+void tst_QImageReader::saveFormat_data()
+{
+    QTest::addColumn<QImage::Format>("format");
+
+    QTest::newRow("Format_Mono") << QImage::Format_Mono;
+    QTest::newRow("Format_MonoLSB") << QImage::Format_MonoLSB;
+    QTest::newRow("Format_Indexed8") << QImage::Format_Indexed8;
+    QTest::newRow("Format_RGB32") << QImage::Format_RGB32;
+    QTest::newRow("Format_ARGB32") << QImage::Format_ARGB32;
+    QTest::newRow("Format_ARGB32_Premultiplied") << QImage::Format_ARGB32_Premultiplied;
+    QTest::newRow("Format_RGB16") << QImage::Format_RGB16;
+    QTest::newRow("Format_ARGB8565_Premultiplied") << QImage::Format_ARGB8565_Premultiplied;
+    QTest::newRow("Format_RGB666") << QImage::Format_RGB666;
+    QTest::newRow("Format_ARGB6666_Premultiplied") << QImage::Format_ARGB6666_Premultiplied;
+    QTest::newRow("Format_RGB555") << QImage::Format_RGB555;
+    QTest::newRow("Format_ARGB8555_Premultiplied") << QImage::Format_ARGB8555_Premultiplied;
+    QTest::newRow("Format_RGB888") << QImage::Format_RGB888;
+    QTest::newRow("Format_RGB444") << QImage::Format_RGB444;
+    QTest::newRow("Format_ARGB4444_Premultiplied") << QImage::Format_ARGB4444_Premultiplied;
+}
+
+void tst_QImageReader::saveFormat()
+{
+    QFETCH(QImage::Format, format);
+
+    QImage orig(":/images/kollada.png");
+
+    QImage converted = orig.convertToFormat(format);
+    QBuffer buf;
+    buf.open(QIODevice::WriteOnly);
+    QVERIFY(converted.save(&buf, "png"));
+    buf.close();
+    QImage stored = QImage::fromData(buf.buffer(), "png");
+
+    stored = stored.convertToFormat(QImage::Format_ARGB32);
+    converted = converted.convertToFormat(QImage::Format_ARGB32);
+    QCOMPARE(stored, converted);
+}
+
+
 QTEST_MAIN(tst_QImageReader)
 #include "tst_qimagereader.moc"