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/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of Qt for Device Creation.
**
** $QT_BEGIN_LICENSE:BSD$
** 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.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
** * Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** * Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in
** the documentation and/or other materials provided with the
** distribution.
** * Neither the name of The Qt Company Ltd nor the names of its
** contributors may be used to endorse or promote products derived
** from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qquickfreenectvideooutput.h"
#include "qquickfreenectbackend.h"
#include <QQuickWindow>
#include <QSGSimpleTextureNode>
#include <memory>
class TextureOwningNode : public QSGSimpleTextureNode {
std::unique_ptr<QSGTexture> m_texture;
public:
TextureOwningNode() {
}
void setTexture(QSGTexture *texture) {
QSGSimpleTextureNode::setTexture(texture);
m_texture.reset(texture);
}
};
QQuickFreenectVideoOutput::QQuickFreenectVideoOutput()
: m_backend(QQuickFreenectBackend::instance())
{
setFlag(ItemHasContents);
connect(m_backend.get(), SIGNAL(videoFrameReady()), SLOT(onReceivedFrame()));
m_backend->requestVideoStreamType(VideoRGB);
}
QQuickFreenectVideoOutput::StreamType QQuickFreenectVideoOutput::streamType() const
{
return m_backend->requestedVideoStreamType();
}
void QQuickFreenectVideoOutput::setStreamType(StreamType type)
{
m_backend->requestVideoStreamType(type);
emit streamTypeChanged();
m_isStreaming = false;
emit isStreamingChanged();
}
QSGNode *QQuickFreenectVideoOutput::updatePaintNode(QSGNode *oldNode, UpdatePaintNodeData *)
{
StreamType bufferType = m_backend->videoFrontBufferStreamType();
const QSize textureSize(640, bufferType == VideoRGB ? 480 : 488);
auto textureNode = static_cast<TextureOwningNode *>(oldNode);
if (!textureNode) {
GLuint texId;
glGenTextures(1, &texId);
QSGTexture *texture = window()->createTextureFromId(texId, textureSize, QQuickWindow::TextureOwnsGLTexture);
textureNode = new TextureOwningNode;
textureNode->setTexture(texture);
}
qreal widthRatio = width() / textureSize.width();
qreal heightRatio = height() / textureSize.height();
QSizeF nodeSize = QSizeF(textureSize) * std::min(widthRatio, heightRatio);
textureNode->setRect(QRectF(QPointF((width() - nodeSize.width()) / 2, (height() - nodeSize.height()) / 2), nodeSize));
if (uint8_t *buffer = m_backend->pickVideoFrontBuffer()) {
GLint bufferFormat = bufferType == VideoRGB ? GL_RGB : GL_LUMINANCE;
glBindTexture(GL_TEXTURE_2D, textureNode->texture()->textureId());
glTexImage2D(GL_TEXTURE_2D, 0, bufferFormat, textureSize.width(), textureSize.height(), 0, bufferFormat, GL_UNSIGNED_BYTE, buffer);
textureNode->markDirty(QSGNode::DirtyMaterial);
}
return textureNode;
}
void QQuickFreenectVideoOutput::onReceivedFrame()
{
m_isStreaming = true;
emit isStreamingChanged();
update();
}
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