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/* ============================================================
*
* This file is a part of kipi-plugins project
* http://www.kipi-plugins.org
*
* Date : 2007-11-14
* Description : a kipi plugin to slide images.
*
* Copyright (C) 2007 by Valerio Fuoglio <valerio dot fuoglio at gmail dot com>
*
* Parts of this code are based on smoothslidesaver by Carsten Weinhold
* <carsten dot weinhold at gmx dot de>
*
* 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.
*
* ============================================================ */
// Qt includes.
#include <qdir.h>
#include <qvaluevector.h>
#include <qdeepcopy.h>
#include <qwmatrix.h>
#include <qobject.h>
// KDE includes.
#include <klocale.h>
// Local includes.
#include "slideshowkb.h"
#include "imageloadthread.h"
#include "imageloadthread.moc"
namespace KIPISlideShowPlugin
{
ImageLoadThread::ImageLoadThread(QValueList<QPair<QString, int> >& fileList,
int width, int height)
{
m_initialized = false;
m_needImage = true;
m_haveImages = false;
m_quitRequested = false;
m_fileIndex = 0;
m_fileList = fileList;
m_width = width;
m_height = height;
}
void ImageLoadThread::quit() {
QMutexLocker locker(&m_condLock);
m_quitRequested = true;
m_imageRequest.wakeOne();
}
void ImageLoadThread::requestNewImage() {
QMutexLocker locker(&m_condLock);
if ( !m_needImage) {
m_needImage = true;
m_imageRequest.wakeOne();
}
}
void ImageLoadThread::run() {
QMutexLocker locker(&m_condLock);
// we enter the loop with m_needImage==true, so we will immediatly
// try to load an image
while (true) {
if (m_quitRequested)
break;
if (m_needImage) {
if ( m_fileIndex == (int)m_fileList.count() )
{
m_needImage = false;
emit(endOfShow());
continue;
}
m_needImage = false;
m_condLock.unlock();
bool ok;
do {
ok = loadImage();
if ( !ok)
invalidateCurrentImageName();
} while ( !ok && m_fileIndex < (int)m_fileList.count());
if ( m_fileIndex == (int)m_fileList.count() )
{
emit(endOfShow());
m_condLock.lock();
continue;
}
if ( !ok) {
// generate a black dummy image
m_texture = QImage(128, 128, 32);
m_texture.fill(Qt::black.rgb());
}
m_condLock.lock();
m_fileIndex++;
if ( !m_initialized) {
m_haveImages = ok;
m_initialized = true;
}
} else {
// wait for new requests from the consumer
m_imageRequest.wait(&m_condLock);
}
}
}
bool ImageLoadThread::loadImage() {
QPair<QString, int> fileAngle = m_fileList[m_fileIndex];
QString path(fileAngle.first);
int angle(fileAngle.second);
QImage image(path);
if (angle != 0)
{
QWMatrix wm;
wm.rotate(angle);
image = image.xForm(wm);
}
if (image.isNull()) {
return false;
}
float aspect = (float)image.width() / (float)image.height();
image = image.smoothScale(m_width, m_height, QImage::ScaleMin);
m_imageLock.lock();
// this is the critical moment, when we make the new texture and
// aspect available to the consumer
m_textureAspect = aspect;
m_texture = QGLWidget::convertToGLFormat(image);
m_imageLock.unlock();
return true;
}
void ImageLoadThread::invalidateCurrentImageName() {
m_fileList.remove(m_fileList[m_fileIndex]);
m_fileIndex++;
}
} // NameSpace KIPISlideShowPlugin
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