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181 lines
4.4 KiB
181 lines
4.4 KiB
/* ============================================================
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*
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* This file is a part of kipi-plugins project
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* http://www.kipi-plugins.org
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*
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* Date : 2007-11-14
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* Description : a kipi plugin to slide images.
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*
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* Copyright (C) 2007 by Valerio Fuoglio <valerio dot fuoglio at gmail dot com>
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*
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* Parts of this code are based on smoothslidesaver by Carsten Weinhold
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* <carsten dot weinhold at gmx dot de>
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*
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* This program is free software; you can redistribute it
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* and/or modify it under the terms of the GNU General
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* Public License as published by the Free Software Foundation;
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* either version 2, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* ============================================================ */
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// TQt includes.
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#include <tqdir.h>
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#include <tqvaluevector.h>
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#include <tqdeepcopy.h>
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#include <tqwmatrix.h>
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#include <tqobject.h>
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// KDE includes.
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#include <tdelocale.h>
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// Local includes.
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#include "slideshowkb.h"
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#include "imageloadthread.h"
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#include "imageloadthread.moc"
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namespace KIPISlideShowPlugin
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{
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ImageLoadThread::ImageLoadThread(TQValueList<TQPair<TQString, int> >& fileList,
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int width, int height)
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{
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m_initialized = false;
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m_needImage = true;
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m_haveImages = false;
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m_quitRequested = false;
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m_fileIndex = 0;
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m_fileList = fileList;
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m_width = width;
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m_height = height;
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}
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void ImageLoadThread::quit() {
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TQMutexLocker locker(&m_condLock);
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m_quitRequested = true;
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m_imageRequest.wakeOne();
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}
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void ImageLoadThread::requestNewImage() {
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TQMutexLocker locker(&m_condLock);
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if ( !m_needImage) {
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m_needImage = true;
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m_imageRequest.wakeOne();
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}
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}
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void ImageLoadThread::run() {
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TQMutexLocker locker(&m_condLock);
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// we enter the loop with m_needImage==true, so we will immediatly
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// try to load an image
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while (true) {
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if (m_quitRequested)
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break;
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if (m_needImage) {
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if ( m_fileIndex == (int)m_fileList.count() )
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{
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m_needImage = false;
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emit(endOfShow());
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continue;
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}
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m_needImage = false;
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m_condLock.unlock();
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bool ok;
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do {
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ok = loadImage();
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if ( !ok)
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invalidateCurrentImageName();
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} while ( !ok && m_fileIndex < (int)m_fileList.count());
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if ( m_fileIndex == (int)m_fileList.count() )
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{
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emit(endOfShow());
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m_condLock.lock();
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continue;
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}
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if ( !ok) {
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// generate a black dummy image
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m_texture = TQImage(128, 128, 32);
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m_texture.fill(TQt::black.rgb());
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}
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m_condLock.lock();
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m_fileIndex++;
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if ( !m_initialized) {
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m_haveImages = ok;
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m_initialized = true;
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}
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} else {
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// wait for new requests from the consumer
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m_imageRequest.wait(&m_condLock);
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}
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}
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}
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bool ImageLoadThread::loadImage() {
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TQPair<TQString, int> fileAngle = m_fileList[m_fileIndex];
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TQString path(fileAngle.first);
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int angle(fileAngle.second);
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TQImage image(path);
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if (angle != 0)
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{
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TQWMatrix wm;
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wm.rotate(angle);
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image = image.xForm(wm);
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}
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if (image.isNull()) {
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return false;
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}
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float aspect = (float)image.width() / (float)image.height();
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image = image.smoothScale(m_width, m_height, TQImage::ScaleMin);
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m_imageLock.lock();
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// this is the critical moment, when we make the new texture and
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// aspect available to the consumer
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m_textureAspect = aspect;
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m_texture = TQGLWidget::convertToGLFormat(image);
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m_imageLock.unlock();
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return true;
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}
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void ImageLoadThread::invalidateCurrentImageName() {
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m_fileList.remove(m_fileList[m_fileIndex]);
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m_fileIndex++;
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}
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} // NameSpace KIPISlideShowPlugin
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