Video texture streaming support via external EGLImage textures

Created new StreamVideoNode & StreamVideoMaterial classes
for QSG renderer. These classes duplicate the logic of
chromium's direct renderer GLRenderer::DrawStreamVideoQuad.
Added support for new DrawQuad material in DelegatedFrameNode.
Added support for external textures in MailboxTexture.

Change-Id: If569b07dfef985f9833de7e64eeb3f952026bca4
Reviewed-by: Arvid Nilsson <anilsson@blackberry.com>
Reviewed-by: Jocelyn Turcotte <jocelyn.turcotte@digia.com>

1 files changed, 82 insertions, 0 deletions

diff --git a/src/core/stream_video_node.h b/src/core/stream_video_node.h
new file mode 100644
index 000000000..cf16f10d4
--- /dev/null
+++ b/src/core/stream_video_node.h
@@ -0,0 +1,82 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part 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 STREAM_VIDEO_NODE_H
+#define STREAM_VIDEO_NODE_H
+
+#include <QtQuick/qsgmaterial.h>
+#include <QtQuick/qsgnode.h>
+
+QT_BEGIN_NAMESPACE
+class QSGTexture;
+QT_END_NAMESPACE
+
+// These classes duplicate, QtQuick style, the logic of GLRenderer::DrawStreamVideoQuad.
+// Their behavior should stay as close as possible to GLRenderer.
+
+class StreamVideoMaterial : public QSGMaterial
+{
+public:
+    StreamVideoMaterial(QSGTexture *texture);
+
+    virtual QSGMaterialType *type() const Q_DECL_OVERRIDE{
+        static QSGMaterialType theType;
+        return &theType;
+    }
+
+    virtual QSGMaterialShader *createShader() const;
+    virtual int compare(const QSGMaterial *other) const;
+
+    QSGTexture *m_texture;
+};
+
+class StreamVideoNode : public QSGGeometryNode
+{
+public:
+    StreamVideoNode(QSGTexture *texture);
+    void setRect(const QRectF &rect);
+
+private:
+    QSGGeometry m_geometry;
+    StreamVideoMaterial *m_material;
+};
+
+#endif // STREAM_VIDEO_NODE_H