qtmobility/plugins/multimedia/qt7/qt7ciimagevideobuffer.mm
changeset 14 6fbed849b4f4
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/qtmobility/plugins/multimedia/qt7/qt7ciimagevideobuffer.mm	Wed Jun 23 19:08:38 2010 +0300
@@ -0,0 +1,107 @@
+/****************************************************************************
+**
+** 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 Qt Mobility Components.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** 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 "qt7ciimagevideobuffer.h"
+
+#include <QuartzCore/CIFilter.h>
+#include <QuartzCore/CIVector.h>
+
+QT7CIImageVideoBuffer::QT7CIImageVideoBuffer(CIImage *image)
+    : QAbstractVideoBuffer(CoreImageHandle)
+    , m_image(image)
+    , m_buffer(0)
+    , m_mode(NotMapped)
+{
+    [m_image retain];
+}
+
+QT7CIImageVideoBuffer::~QT7CIImageVideoBuffer()
+{
+    [m_image release];
+    [m_buffer release];
+}
+
+QAbstractVideoBuffer::MapMode QT7CIImageVideoBuffer::mapMode() const
+{
+    return m_mode;
+}
+
+uchar *QT7CIImageVideoBuffer::map(QAbstractVideoBuffer::MapMode mode, int *numBytes, int *bytesPerLine)
+{
+    if (mode == NotMapped || m_mode != NotMapped || !m_image)
+        return 0;
+
+    if (!m_buffer) {
+        //swap R and B channels
+        CIFilter *colorSwapFilter = [CIFilter filterWithName: @"CIColorMatrix"  keysAndValues:
+                                     @"inputImage", m_image,
+                                     @"inputRVector", [CIVector vectorWithX: 0  Y: 0  Z: 1  W: 0],
+                                     @"inputGVector", [CIVector vectorWithX: 0  Y: 1  Z: 0  W: 0],
+                                     @"inputBVector", [CIVector vectorWithX: 1  Y: 0  Z: 0  W: 0],
+                                     @"inputAVector", [CIVector vectorWithX: 0  Y: 0  Z: 0  W: 1],
+                                     @"inputBiasVector", [CIVector vectorWithX: 0  Y: 0  Z: 0  W: 0],
+                                     nil];
+        CIImage *img = [colorSwapFilter valueForKey: @"outputImage"];
+
+        m_buffer = [[NSBitmapImageRep alloc] initWithCIImage:img];
+    }
+
+    if (numBytes)
+        *numBytes = [m_buffer bytesPerPlane];
+
+    if (bytesPerLine)
+        *bytesPerLine = [m_buffer bytesPerRow];
+
+    m_mode = mode;
+
+    return [m_buffer bitmapData];
+}
+
+void QT7CIImageVideoBuffer::unmap()
+{
+    m_mode = NotMapped;
+}
+
+QVariant QT7CIImageVideoBuffer::handle() const
+{
+    return QVariant::fromValue<void*>(m_image);
+}
+