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/* ============================================================
*
* This file is a part of digiKam project
* http://www.digikam.org
*
* Date : 2005-12-17
* Description : image file IO threaded interface.
*
* Copyright (C) 2005-2007 by Marcel Wiesweg <marcel.wiesweg@gmx.de>
* Copyright (C) 2005-2007 by Gilles Caulier <caulier dot gilles at gmail dot com>
*
* This program is free software; you can redistribute it
* and/or modify it under the terms of the GNU General
* Public License as published by the Free Software Foundation;
* either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* ============================================================ */
// Local includes.
#include "ddebug.h"
#include "dmetadata.h"
#include "loadsavethread.h"
#include "managedloadsavethread.h"
#include "sharedloadsavethread.h"
#include "loadsavetask.h"
namespace Digikam
{
class LoadSaveThreadPriv
{
public:
LoadSaveThreadPriv()
{
running = true;
blockNotification = false;
lastTask = 0;
}
bool running;
bool blockNotification;
LoadSaveTask *lastTask;
QTime notificationTime;
};
//---------------------------------------------------------------------------------------------------
LoadSaveThread::LoadSaveThread()
{
d = new LoadSaveThreadPriv;
m_currentTask = 0;
m_notificationPolicy = NotificationPolicyTimeLimited;
start();
}
LoadSaveThread::~LoadSaveThread()
{
d->running = false;
{
QMutexLocker lock(&m_mutex);
m_condVar.wakeAll();
}
wait();
if (d->lastTask)
delete d->lastTask;
delete d;
}
void LoadSaveThread::load(LoadingDescription description)
{
QMutexLocker lock(&m_mutex);
m_todo.append(new LoadingTask(this, description));
m_condVar.wakeAll();
}
void LoadSaveThread::save(DImg &image, const QString& filePath, const QString &format)
{
QMutexLocker lock(&m_mutex);
m_todo.append(new SavingTask(this, image, filePath, format));
m_condVar.wakeAll();
}
void LoadSaveThread::run()
{
while (d->running)
{
{
QMutexLocker lock(&m_mutex);
if (d->lastTask)
{
delete d->lastTask;
d->lastTask = 0;
}
m_currentTask = m_todo.getFirst();
if (m_currentTask)
{
m_todo.removeFirst();
if (m_notificationPolicy == NotificationPolicyTimeLimited)
{
// set timing values so that first event is sent only
// after an initial time span.
d->notificationTime = QTime::currentTime();
d->blockNotification = true;
}
}
else
m_condVar.wait(&m_mutex, 1000);
}
if (m_currentTask)
m_currentTask->execute();
}
}
void LoadSaveThread::taskHasFinished()
{
// This function is called by the tasks before they send their final message.
// This is to guarantee the user of the API that at least the final message
// is sent after load() has been called. This might not been the case
// if m_currentTask is currently loading the same image and a race condition
// between the return from execute and the next run of the loop above occurs.
QMutexLocker lock(&m_mutex);
d->lastTask = m_currentTask;
m_currentTask = 0;
}
void LoadSaveThread::customEvent(QCustomEvent *event)
{
if (event->type() == NotifyEvent::notifyEventId())
{
switch (m_notificationPolicy)
{
case NotificationPolicyDirect:
d->blockNotification = false;
break;
case NotificationPolicyTimeLimited:
break;
}
((NotifyEvent *)event)->notify(this);
}
}
void LoadSaveThread::setNotificationPolicy(NotificationPolicy notificationPolicy)
{
m_notificationPolicy = notificationPolicy;
d->blockNotification = false;
}
bool LoadSaveThread::querySendNotifyEvent()
{
// This function is called from the thread to ask for permission to send a notify event.
switch (m_notificationPolicy)
{
case NotificationPolicyDirect:
// Note that m_blockNotification is not protected by a mutex. However, if there is a
// race condition, the worst case is that one event is not sent, which is no problem.
if (d->blockNotification)
return false;
else
{
d->blockNotification = true;
return true;
}
break;
case NotificationPolicyTimeLimited:
// Current default time value: 100 millisecs.
if (d->blockNotification)
d->blockNotification = d->notificationTime.msecsTo(QTime::currentTime()) < 100;
if (d->blockNotification)
return false;
else
{
d->notificationTime = QTime::currentTime();
d->blockNotification = true;
return true;
}
break;
}
return false;
}
// This is a hack needed to prevent hanging when a KProcess-based loader (raw loader)
// is waiting for the process to finish, but the main thread is waiting
// for the thread to finish and no KProcess events are delivered.
// Remove when porting to Qt4.
bool LoadSaveThread::isShuttingDown()
{
// the condition is met after d->running is set to false in the destructor
return running() && !d->running;
}
bool LoadSaveThread::exifRotate(DImg &image, const QString& filePath)
{
QVariant attribute(image.attribute("exifRotated"));
if (attribute.isValid() && attribute.toBool())
return false;
// Raw files are already rotated properlly by dcraw. Only perform auto-rotation with JPEG/PNG/TIFF file.
// We don't have a feedback from dcraw about auto-rotated RAW file during decoding. Return true anyway.
attribute = image.attribute("fromRawEmbeddedPreview");
if (DImg::fileFormat(filePath) == DImg::RAW && !(attribute.isValid() && attribute.toBool()) )
{
return true;
}
// Rotate thumbnail based on metadata orientation information
DMetadata metadata(filePath);
DMetadata::ImageOrientation orientation = metadata.getImageOrientation();
bool rotatedOrFlipped = false;
if(orientation != DMetadata::ORIENTATION_NORMAL)
{
switch (orientation)
{
case DMetadata::ORIENTATION_NORMAL:
case DMetadata::ORIENTATION_UNSPECIFIED:
break;
case DMetadata::ORIENTATION_HFLIP:
image.flip(DImg::HORIZONTAL);
rotatedOrFlipped = true;
break;
case DMetadata::ORIENTATION_ROT_180:
image.rotate(DImg::ROT180);
rotatedOrFlipped = true;
break;
case DMetadata::ORIENTATION_VFLIP:
image.flip(DImg::VERTICAL);
rotatedOrFlipped = true;
break;
case DMetadata::ORIENTATION_ROT_90_HFLIP:
image.rotate(DImg::ROT90);
image.flip(DImg::HORIZONTAL);
rotatedOrFlipped = true;
break;
case DMetadata::ORIENTATION_ROT_90:
image.rotate(DImg::ROT90);
rotatedOrFlipped = true;
break;
case DMetadata::ORIENTATION_ROT_90_VFLIP:
image.rotate(DImg::ROT90);
image.flip(DImg::VERTICAL);
rotatedOrFlipped = true;
break;
case DMetadata::ORIENTATION_ROT_270:
image.rotate(DImg::ROT270);
rotatedOrFlipped = true;
break;
}
}
image.setAttribute("exifRotated", true);
return rotatedOrFlipped;
/*
if (orientation == DMetadata::ORIENTATION_NORMAL ||
orientation == DMetadata::ORIENTATION_UNSPECIFIED)
return;
QWMatrix matrix;
switch (orientation)
{
case DMetadata::ORIENTATION_NORMAL:
case DMetadata::ORIENTATION_UNSPECIFIED:
break;
case DMetadata::ORIENTATION_HFLIP:
matrix.scale(-1, 1);
break;
case DMetadata::ORIENTATION_ROT_180:
matrix.rotate(180);
break;
case DMetadata::ORIENTATION_VFLIP:
matrix.scale(1, -1);
break;
case DMetadata::ORIENTATION_ROT_90_HFLIP:
matrix.scale(-1, 1);
matrix.rotate(90);
break;
case DMetadata::ORIENTATION_ROT_90:
matrix.rotate(90);
break;
case DMetadata::ORIENTATION_ROT_90_VFLIP:
matrix.scale(1, -1);
matrix.rotate(90);
break;
case DMetadata::ORIENTATION_ROT_270:
matrix.rotate(270);
break;
}
// transform accordingly
thumb = thumb.xForm( matrix );
*/
}
} // namespace Digikam
#include "loadsavethread.moc"
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