Qt.labs.sharedimage: Make plugin optional

This moves the sharedimage types into a new library and is meant to make
them availabe to the QML compiler at some point in the future.

Task-number: QTBUG-90487
Change-Id: If79425a43cb8c1831422631791d35c1f329c7e80
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>

1 files changed, 93 insertions, 0 deletions

diff --git a/src/labs/sharedimage/qsharedimageprovider_p.h b/src/labs/sharedimage/qsharedimageprovider_p.h
new file mode 100644
index 0000000000..f8bea9e784
--- /dev/null
+++ b/src/labs/sharedimage/qsharedimageprovider_p.h
@@ -0,0 +1,93 @@
+/****************************************************************************
+**
+** Copyright (C) 2017 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the plugins of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** 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-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QSHAREDIMAGEPROVIDER_H
+#define QSHAREDIMAGEPROVIDER_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qtlabssharedimageglobal_p.h"
+
+#include <QQuickImageProvider>
+#include <private/qquickpixmapcache_p.h>
+#include <QScopedPointer>
+
+#include "qsharedimageloader_p.h"
+
+class SharedImageProvider;
+
+class QuickSharedImageLoader : public QSharedImageLoader
+{
+    Q_OBJECT
+    friend class SharedImageProvider;
+
+public:
+    enum ImageParameter {
+        OriginalSize = 0,
+        RequestedSize,
+        ProviderOptions,
+        NumImageParameters
+    };
+
+    QuickSharedImageLoader(QObject *parent = nullptr);
+protected:
+    QImage loadFile(const QString &path, ImageParameters *params) override;
+    QString key(const QString &path, ImageParameters *params) override;
+};
+
+class Q_LABSSHAREDIMAGE_PRIVATE_EXPORT SharedImageProvider : public QQuickImageProviderWithOptions
+{
+public:
+    SharedImageProvider();
+
+    QImage requestImage(const QString &id, QSize *size, const QSize &requestedSize, const QQuickImageProviderOptions &options) override;
+
+protected:
+    QScopedPointer<QuickSharedImageLoader> loader;
+};
+#endif // QSHAREDIMAGEPROVIDER_H