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/****************************************************************************
**
** Copyright (C) 2014 Digia Plc
** All rights reserved.
** For any questions to Digia, please use contact form at http://qt.digia.com
**
** This file is part of the QtDataVisualization module.
**
** Licensees holding valid Qt Enterprise licenses may use this file in
** accordance with the Qt Enterprise License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.digia.com
**
****************************************************************************/
#include "declarativerendernode_p.h"
#include <QtQuick/QQuickWindow>
#include <QtGui/QOpenGLFramebufferObject>
QT_BEGIN_NAMESPACE_DATAVISUALIZATION
DeclarativeRenderNode::DeclarativeRenderNode(QQuickWindow *window,
Abstract3DController *controller,
AbstractDeclarative::RenderingMode mode,
QObject *parent)
: QObject(parent),
m_fbo(0),
m_texture(0),
m_window(window),
m_controller(controller),
m_mode(mode)
{
connect(window, &QQuickWindow::beforeRendering,
this, &DeclarativeRenderNode::renderFBO,
Qt::DirectConnection);
}
DeclarativeRenderNode::~DeclarativeRenderNode()
{
delete m_texture;
delete m_fbo;
}
void DeclarativeRenderNode::renderFBO()
{
QSize size = rect().size().toSize();
if (size.width() <= 0 || size.height() <= 0)
return;
// Create FBO
if (!m_fbo) {
QOpenGLFramebufferObjectFormat format;
format.setAttachment(QOpenGLFramebufferObject::Depth);
m_fbo = new QOpenGLFramebufferObject(size, format);
m_texture = m_window->createTextureFromId(m_fbo->texture(), size);
setTexture(m_texture);
// Flip texture
QSize ts = m_texture->textureSize();
QRectF sourceRect(0, 0, ts.width(), ts.height());
float tmp = sourceRect.top();
sourceRect.setTop(sourceRect.bottom());
sourceRect.setBottom(tmp);
QSGGeometry *geometry = this->geometry();
QSGGeometry::updateTexturedRectGeometry(geometry, rect(),
m_texture->convertToNormalizedSourceRect(sourceRect));
markDirty(DirtyMaterial);
}
// Call the shared rendering function
m_fbo->bind();
glDisable(GL_BLEND);
m_controller->render(m_fbo->handle());
glEnable(GL_BLEND);
m_fbo->release();
// New view is in the FBO, request repaint of scene graph
}
QT_END_NAMESPACE_DATAVISUALIZATION
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