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/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the QtDataVis3D module.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** 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, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "declarativescatterrenderer_p.h"
#include <QtQuick/QQuickWindow>
#include <QtGui/QOpenGLFramebufferObject>
QT_DATAVIS3D_BEGIN_NAMESPACE
DeclarativeScatterRenderer::DeclarativeScatterRenderer(QQuickWindow *window,
Scatter3DController *renderer)
: m_fbo(0),
m_texture(0),
m_window(window),
m_scatterRenderer(renderer)
{
connect(m_window, SIGNAL(beforeRendering()), this, SLOT(render()), Qt::DirectConnection);
}
DeclarativeScatterRenderer::~DeclarativeScatterRenderer()
{
delete m_texture;
delete m_fbo;
}
void DeclarativeScatterRenderer::render()
{
QSize size = rect().size().toSize();
// 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
// TODO: Can be gotten rid of once support for texture flipping becomes available (in Qt5.2)
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);
//qDebug() << "create node" << m_fbo->handle() << m_texture->textureId() << m_fbo->size();
}
// Call the shared rendering function
m_fbo->bind();
m_scatterRenderer->render(m_fbo->handle());
m_fbo->release();
// New view is in the FBO, request repaint of scene graph
m_window->update();
}
QT_DATAVIS3D_END_NAMESPACE
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