1 files changed, 144 insertions, 0 deletions
diff --git a/examples/multimedia/videographicsitem/videoitem.cpp b/examples/multimedia/videographicsitem/videoitem.cpp
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+++ b/examples/multimedia/videographicsitem/videoitem.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** 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, Nokia gives you certain additional
+** rights.  These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include "videoitem.h"
+
+#include <QtMultimedia>
+
+VideoItem::VideoItem(QGraphicsItem *parent)
+    : QGraphicsItem(parent)
+    , imageFormat(QImage::Format_Invalid)
+    , framePainted(false)
+{
+}
+
+VideoItem::~VideoItem()
+{
+}
+
+QRectF VideoItem::boundingRect() const
+{
+    return QRectF(QPointF(0,0), surfaceFormat().sizeHint());
+}
+
+void VideoItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
+{
+    Q_UNUSED(option);
+    Q_UNUSED(widget);
+
+    if (currentFrame.map(QAbstractVideoBuffer::ReadOnly)) {
+        const QTransform oldTransform = painter->transform();
+
+        if (surfaceFormat().scanLineDirection() == QVideoSurfaceFormat::BottomToTop) {
+           painter->scale(1, -1);
+           painter->translate(0, -boundingRect().height());
+        }
+
+        painter->drawImage(boundingRect(), QImage(
+                currentFrame.bits(),
+                imageSize.width(),
+                imageSize.height(),
+                imageFormat));
+
+        painter->setTransform(oldTransform);
+
+        framePainted = true;
+
+        currentFrame.unmap();
+    }
+}
+
+QList<QVideoFrame::PixelFormat> VideoItem::supportedPixelFormats(
+        QAbstractVideoBuffer::HandleType handleType) const
+{
+    if (handleType == QAbstractVideoBuffer::NoHandle) {
+        return QList<QVideoFrame::PixelFormat>()
+                << QVideoFrame::Format_RGB32
+                << QVideoFrame::Format_ARGB32
+                << QVideoFrame::Format_ARGB32_Premultiplied
+                << QVideoFrame::Format_RGB565
+                << QVideoFrame::Format_RGB555;
+    } else {
+        return QList<QVideoFrame::PixelFormat>();
+    }
+}
+
+bool VideoItem::start(const QVideoSurfaceFormat &format)
+{
+    if (isFormatSupported(format)) {
+        imageFormat = QVideoFrame::equivalentImageFormat(format.pixelFormat());
+        imageSize = format.frameSize();
+        framePainted = true;
+
+        QAbstractVideoSurface::start(format);
+
+        prepareGeometryChange();
+
+        return true;
+    } else {
+        return false;
+    }
+}
+
+void VideoItem::stop()
+{
+    currentFrame = QVideoFrame();
+    framePainted = false;
+
+    QAbstractVideoSurface::stop();
+}
+
+bool VideoItem::present(const QVideoFrame &frame)
+{
+    if (!framePainted) {
+        if (!isStarted())
+            setError(StoppedError);
+
+        return false;
+    } else {
+        currentFrame = frame;
+        framePainted = false;
+
+        update();
+
+        return true;
+    }
+}