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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 "declarativerenderer_p.h"
#include <QtQuick/QQuickWindow>
#include <QtGui/QOpenGLFramebufferObject>
QT_DATAVISUALIZATION_BEGIN_NAMESPACE
DeclarativeRenderer::DeclarativeRenderer(QQuickWindow *window, Abstract3DController *controller) :
m_fbo(0),
m_texture(0),
m_window(window),
m_controller(controller)
{
connect(m_window, &QQuickWindow::beforeSynchronizing, this,
&DeclarativeRenderer::synchDataToRenderer, Qt::DirectConnection);
connect(m_window, &QQuickWindow::beforeRendering, this,
&DeclarativeRenderer::renderFBO, Qt::DirectConnection);
connect(m_controller.data(), &Abstract3DController::needRender, m_window,
&QQuickWindow::update);
}
DeclarativeRenderer::~DeclarativeRenderer()
{
delete m_texture;
delete m_fbo;
}
void DeclarativeRenderer::synchDataToRenderer()
{
if (m_controller) {
m_controller->initializeOpenGL();
m_controller->synchDataToRenderer();
}
}
void DeclarativeRenderer::setDevicePixelRatio(float devicePixelRatio )
{
m_devicePixelRatio = devicePixelRatio;
}
void DeclarativeRenderer::renderFBO()
{
if (m_controller) {
QSize size = rect().size().toSize();
size.setWidth(size.width() * m_devicePixelRatio);
size.setHeight(size.height() * m_devicePixelRatio);
// 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);
}
// Call the graph rendering function
m_fbo->bind();
m_controller->render(m_fbo->handle());
m_fbo->release();
}
}
QT_DATAVISUALIZATION_END_NAMESPACE
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