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/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** All rights reserved.
** Contact: http://www.qt-project.org/
**
** This file is part of the QtLocation module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** 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, Nokia gives you certain additional
** rights. These rights are described in the Nokia 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.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qgeomapsphere_p.h"
#include "qgeotilecache_p.h"
#include "qgeotile_p.h"
#include "qgeomap_p.h"
#include "qgeomap_p_p.h"
#include "qgeomappingmanager.h"
#include <QOpenGLFramebufferObject>
#include <Qt3D/qglscenenode.h>
#include <Qt3D/qglframebufferobjectsurface.h>
#include <Qt3D/qglcamera.h>
#include <Qt3D/qglpainter.h>
#include <QVector>
#include <QTimer>
QT_BEGIN_NAMESPACE
QGeoMapSphere::QGeoMapSphere(QGeoMap* map, QGeoMapPrivate *mapPrivate, QGeoTileCache *tileCache)
: QObject(0),
tileCache_(tileCache),
map_(map),
mapPrivate_(mapPrivate),
manager_(0)
{
sphereNode_ = new QGLSceneNode(this);
connect(this,
SIGNAL(tileUpdated()),
map,
SIGNAL(updateRequired()));
}
QGeoMapSphere::~QGeoMapSphere()
{
QList<QGLSceneNode*> nodes = built_.values();
for (int i = 0; i < nodes.size(); ++i) {
QGLSceneNode *node = nodes.at(i);
//node->material()->texture()->release();
node->geometry().clear();
sphereNode_->removeNode(node);
delete node;
}
}
void QGeoMapSphere::setMappingManager(QGeoMappingManager *manager)
{
manager_ = manager;
}
QGLSceneNode* QGeoMapSphere::sphereSceneNode() const
{
return sphereNode_;
}
// Function to perform housekeeping that require access to GL context
// (access to GL context varies depending on if we are running as
// c++ app or QML app).
//
// Function is guaranteed to be only called when executing in
// rendering thread with valid GL context. Furthermore it is
// safe to update any geometry/structures - mutex is locked.
void QGeoMapSphere::GLContextAvailable()
{
// need something like this in the cache for
// releasing textures and freeing nodes that
// have been evicted from the GPU
tileCache_->GLContextAvailable(sphereNode_);
// qDeleteAll(obsoleteNodes_);
// obsoleteNodes_.clear();
}
void QGeoMapSphere::update(const QList<QGeoTileSpec> &tiles)
{
QHash<QGeoTileSpec, QGLSceneNode*> stillBuilt;
QVector<QGeoTileSpec> req(tiles.size());
QVector<QGeoTileSpec> draw(tiles.size());
QSet<QGeoTileSpec> cancelTiles = requested_ - tiles.toSet();
int reqSize = 0;
int drawSize = 0;
QList<QGeoTileSpec>::const_iterator i = tiles.constBegin();
QList<QGeoTileSpec>::const_iterator tilesEnd = tiles.constEnd();
while (i != tilesEnd) {
/*
If the tile is already built or has been requested then we
shouldn't use it (where "use" means drawing a cached tile or
requested an uncached tile).
*/
if (built_.contains(*i)) {
stillBuilt.insert(*i, built_.value(*i));
} else if (!requested_.contains(*i)){
/*
Otherwise we add it to the correct list
*/
if (tileCache_->contains(*i)) {
draw[drawSize] = *i;
++drawSize;
} else {
req[reqSize] = *i;
++reqSize;
requested_.insert(*i);
}
}
++i;
}
req.resize(reqSize);
requested_ -= cancelTiles;
updateMutex.lock();
QHash<QGeoTileSpec, QGLSceneNode*>::const_iterator j = built_.constBegin();
QHash<QGeoTileSpec, QGLSceneNode*>::const_iterator end = built_.constEnd();
while (j != end) {
QGeoTileSpec spec = j.key();
if (!stillBuilt.contains(spec)) {
sphereNode_->removeNode(j.value());
}
++j;
}
built_.swap(stillBuilt);
updateMutex.unlock();
for (int i = 0; i < drawSize; ++i)
displayTile(draw.at(i));
if (req.isEmpty()) {
emit tileUpdated();
} else {
if (manager_) {
manager_->updateTileRequests(map_, req.toList().toSet(), cancelTiles);
}
}
}
void QGeoMapSphere::tileFetched(const QGeoTileSpec &spec)
{
if (!requested_.contains(spec))
return;
displayTile(spec);
requested_.remove(spec);
emit tileUpdated();
}
void QGeoMapSphere::displayTile(const QGeoTileSpec &spec)
{
if (built_.contains(spec))
return;
updateMutex.lock();
QGeoTile tile = tileCache_->get(spec);
QGLSceneNode *node = tile.sceneNode();
if (!node) {
node = mapPrivate_->createTileNode(tile);
tile.setSceneNode(node);
tile.bind();
tileCache_->update(spec, tile);
}
if (node) {
sphereNode_->addNode(node);
built_.insert(spec, node);
}
updateMutex.unlock();
}
void QGeoMapSphere::paintGL(QGLPainter *painter)
{
if (!updateMutex.tryLock()) {
qWarning() << "----- map will miss a frame, no mutex acquired!------";
return;
}
GLContextAvailable();
sphereNode_->draw(painter);
updateMutex.unlock();
}
QT_END_NAMESPACE
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