Polish the shared image provider

When the new shared memory image provider was added, some of the
issues identified during review were postponed to be fixed during
stabilization phase. This commit deals with
- Replace the kludge for registering plugin version
- Add autotest
- Place plugin in labs
- Use QT_CONFIG instead of QT_NO_xxx
- Use the new extended image provider api, in order to use the
  scaled-size calculation from Quick

Change-Id: I75c01c7565650fcf859411dde9520ee65b2b0c64
Reviewed-by: Christian Stromme <christian.stromme@qt.io>

4 files changed, 117 insertions, 1 deletions

diff --git a/tests/auto/quick/quick.pro b/tests/auto/quick/quick.pro
index 6e9998c061..00be8240e5 100644
--- a/tests/auto/quick/quick.pro
+++ b/tests/auto/quick/quick.pro
@@ -85,7 +85,8 @@ QUICKTESTS =  \
     qquickdesignersupport \
     qquickscreen \
     touchmouse \
-    scenegraph
+    scenegraph \
+    sharedimage
 
 SUBDIRS += $$PUBLICTESTS
 
diff --git a/tests/auto/quick/sharedimage/data/yellow.png b/tests/auto/quick/sharedimage/data/yellow.png
new file mode 100644
index 0000000000..51e8aaf38c
--- /dev/null
+++ b/tests/auto/quick/sharedimage/data/yellow.png
diff --git a/tests/auto/quick/sharedimage/sharedimage.pro b/tests/auto/quick/sharedimage/sharedimage.pro
new file mode 100644
index 0000000000..00ec2c1131
--- /dev/null
+++ b/tests/auto/quick/sharedimage/sharedimage.pro
@@ -0,0 +1,12 @@
+CONFIG += testcase
+TARGET = tst_sharedimage
+CONFIG -= app_bundle
+
+SOURCES += tst_sharedimage.cpp
+
+QT += testlib quick-private
+
+TESTDATA = data/*
+
+OTHER_FILES += \
+    data/yellow.png
diff --git a/tests/auto/quick/sharedimage/tst_sharedimage.cpp b/tests/auto/quick/sharedimage/tst_sharedimage.cpp
new file mode 100644
index 0000000000..b91fc8a0de
--- /dev/null
+++ b/tests/auto/quick/sharedimage/tst_sharedimage.cpp
@@ -0,0 +1,103 @@
+/****************************************************************************
+**
+** Copyright (C) 2016 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the test suite of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:GPL-EXCEPT$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3 as published by the Free Software
+** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtTest>
+#include <private/qquickimage_p.h>
+#include <QQmlApplicationEngine>
+
+class tst_sharedimage : public QObject
+{
+    Q_OBJECT
+public:
+    tst_sharedimage()
+    {
+    }
+
+private slots:
+    void initTestCase();
+    void compareToPlainLoad_data();
+    void compareToPlainLoad();
+};
+
+void tst_sharedimage::initTestCase()
+{
+#if !QT_CONFIG(systemsemaphore)
+    QSKIP("Shared image not supported");
+#endif
+}
+
+void tst_sharedimage::compareToPlainLoad_data()
+{
+    QString imagePath = QFINDTESTDATA("data/yellow.png");
+    if (imagePath.startsWith(QLatin1Char('/')))
+        imagePath.remove(0, 1);
+    QString plainImage("Image { source: \"file:///%1\"; cache: false; %2 }");
+    QString sharedImage("Image { source: \"image://shared/%1\"; cache: false; %2 }");
+    QString script("import QtQuick 2.0\nimport Qt.labs.sharedimage 1.0\n%1\n");
+
+    QString plain = script.arg(plainImage).arg(imagePath);
+    QString shared = script.arg(sharedImage).arg(imagePath);
+
+    QTest::addColumn<QByteArray>("plainScript");
+    QTest::addColumn<QByteArray>("sharedScript");
+
+    QString opts = QStringLiteral("asynchronous: false;");
+    QTest::newRow("sync") << plain.arg(opts).toLatin1() << shared.arg(opts).toLatin1();
+
+    opts = QStringLiteral("asynchronous: true");
+    QTest::newRow("async") << plain.arg(opts).toLatin1() << shared.arg(opts).toLatin1();
+
+    opts = QStringLiteral("sourceSize: Qt.size(50, 50)");
+    QTest::newRow("scaled, stretch") << plain.arg(opts).toLatin1() << shared.arg(opts).toLatin1();
+
+    opts = QStringLiteral("sourceSize: Qt.size(50, 50); fillMode: Image.PreserveAspectFit");
+    QTest::newRow("scaled, aspectfit") << plain.arg(opts).toLatin1() << shared.arg(opts).toLatin1();
+}
+
+void tst_sharedimage::compareToPlainLoad()
+{
+    QFETCH(QByteArray, plainScript);
+    QFETCH(QByteArray, sharedScript);
+
+    QImage images[2];
+    for (int i = 0; i < 2; i++) {
+        QQmlApplicationEngine engine;
+        engine.loadData(i ? sharedScript : plainScript);
+        QVERIFY(engine.rootObjects().size());
+        QQuickImage *obj = qobject_cast<QQuickImage*>(engine.rootObjects().at(0));
+        QVERIFY(obj != 0);
+        QTRY_VERIFY(!obj->image().isNull());
+        images[i] = obj->image();
+    }
+
+    QCOMPARE(images[1], images[0].convertToFormat(images[1].format()));
+}
+
+QTEST_MAIN(tst_sharedimage)
+
+#include "tst_sharedimage.moc"