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/****************************************************************************
**
** Copyright (C) 2013 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 "declarativescatterrenderer_p.h"
#include <QtQuick/QQuickWindow>
#include <QtGui/QOpenGLFramebufferObject>
QT_DATAVISUALIZATION_BEGIN_NAMESPACE
DeclarativeScatterRenderer::DeclarativeScatterRenderer(QQuickWindow *window,
Scatter3DController *renderer)
: m_fbo(0),
m_texture(0),
m_window(window),
m_scatterRenderer(renderer)
{
connect(m_window, &QQuickWindow::beforeSynchronizing, this,
&DeclarativeScatterRenderer::synchDataToRenderer, Qt::DirectConnection);
connect(m_window, &QQuickWindow::beforeRendering, this,
&DeclarativeScatterRenderer::renderFBO, Qt::DirectConnection);
connect(m_scatterRenderer, &Abstract3DController::needRender, m_window,
&QQuickWindow::update);
}
DeclarativeScatterRenderer::~DeclarativeScatterRenderer()
{
delete m_texture;
delete m_fbo;
}
void DeclarativeScatterRenderer::synchDataToRenderer()
{
m_scatterRenderer->initializeOpenGL();
m_scatterRenderer->synchDataToRenderer();
}
void DeclarativeScatterRenderer::renderFBO()
{
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();
}
QT_DATAVISUALIZATION_END_NAMESPACE
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