1 files changed, 115 insertions, 0 deletions
diff --git a/tradeshow/enterprise-kinectdatavis/src/quickfreenect/qquickfreenectvideooutput.cpp b/tradeshow/enterprise-kinectdatavis/src/quickfreenect/qquickfreenectvideooutput.cpp
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+++ b/tradeshow/enterprise-kinectdatavis/src/quickfreenect/qquickfreenectvideooutput.cpp
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+/****************************************************************************
+**
+** Copyright (C) 2015 Digia Plc and/or its subsidiary(-ies).
+** Contact: For any questions to Digia, please use the contact form at
+** http://www.qt.io
+**
+** This file is part of the examples of the Qt Enterprise Embedded.
+**
+** $QT_BEGIN_LICENSE:BSD$
+** 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 Digia Plc and its Subsidiary(-ies) 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();
+}