Convenience class for FBO rendering in Qt Quick

Change-Id: I5712bbfa0cde9f2fe5fddc35c4cc23597717065c
Reviewed-by: Lars Knoll <lars.knoll@digia.com>

1 files changed, 98 insertions, 0 deletions

diff --git a/src/quick/items/qquickframebufferobject.h b/src/quick/items/qquickframebufferobject.h
new file mode 100644
index 0000000000..789679d74c
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+++ b/src/quick/items/qquickframebufferobject.h
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+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtQuick module 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 Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QQUICKFRAMEBUFFEROBJECT_H
+#define QQUICKFRAMEBUFFEROBJECT_H
+
+#include <QQuickItem>
+
+QT_BEGIN_NAMESPACE
+
+
+class QOpenGLFramebufferObject;
+class QQuickFramebufferObjectPrivate;
+class QSGFramebufferObjectNode;
+
+class Q_QUICK_EXPORT QQuickFramebufferObject : public QQuickItem
+{
+    Q_OBJECT
+    Q_DECLARE_PRIVATE(QQuickFramebufferObject)
+
+    Q_PROPERTY(bool textureFollowsItemSize READ textureFollowsItemSize WRITE setTextureFollowsItemSize NOTIFY textureFollowsItemSizeChanged)
+
+public:
+
+    class Q_QUICK_EXPORT Renderer {
+    protected:
+        Renderer();
+        virtual ~Renderer();
+        virtual void render() = 0;
+        virtual QOpenGLFramebufferObject *createFramebufferObject(const QSize &size);
+        virtual void synchronize(QQuickFramebufferObject *);
+        QOpenGLFramebufferObject *framebufferObject() const;
+        void update();
+        void invalidateFramebufferObject();
+    private:
+        friend class QSGFramebufferObjectNode;
+        friend class QQuickFramebufferObject;
+        void *data;
+    };
+
+    QQuickFramebufferObject(QQuickItem *parent = 0);
+
+    bool textureFollowsItemSize() const;
+    void setTextureFollowsItemSize(bool follows);
+
+    virtual Renderer *createRenderer() const = 0;
+
+protected:
+    void geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry);
+
+protected:
+    QSGNode *updatePaintNode(QSGNode *, UpdatePaintNodeData *) Q_DECL_OVERRIDE;
+
+Q_SIGNALS:
+    void textureFollowsItemSizeChanged(bool);
+};
+
+QT_END_NAMESPACE
+
+#endif // QQUICKFRAMEBUFFEROBJECT_H