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103 lines
3.2 KiB
103 lines
3.2 KiB
15 years ago
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/*
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* This file is part of Krita
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*
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* Copyright (c) 2005 Bart Coppens <kde@bartcoppens.be>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <qthread.h>
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#include <qapplication.h>
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#include <qevent.h>
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#include "kis_accumulating_producer.h"
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static const int EmitCompletedType = QEvent::User + 1;
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/**
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* The threaded producer definition in c++ file because this is really an internal affair.
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* Note that since we _know_ that we'll only have a single instance of it running, at most,
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* we don't care too much about locking and synchronization
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**/
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class KisAccumulatingHistogramProducer::ThreadedProducer : public QThread {
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KisAccumulatingHistogramProducer* m_source;
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bool m_stop;
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protected:
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virtual void run();
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public:
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ThreadedProducer(KisAccumulatingHistogramProducer* source)
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: m_source(source), m_stop(false) {}
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void cancel() { m_stop = true; }
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};
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KisAccumulatingHistogramProducer::KisAccumulatingHistogramProducer(KisCachedHistogramObserver::Producers* source)
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: KisBasicHistogramProducer(
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KisID("ACCHISTO", ""),
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source->at(0)->channels().count(),
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source->at(0)->numberOfBins(),
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0),
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m_source(source)
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{
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m_thread = new ThreadedProducer(this);
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}
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KisAccumulatingHistogramProducer::~KisAccumulatingHistogramProducer() {
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m_thread->cancel();
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m_thread->wait();
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delete m_thread;
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}
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void KisAccumulatingHistogramProducer::addRegionsToBinAsync() {
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m_thread->cancel();
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m_thread->wait();
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clear();
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m_thread->start();
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}
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void KisAccumulatingHistogramProducer::ThreadedProducer::run() {
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m_stop = false;
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uint count = m_source->m_source->count(); // Talk about bad naming schemes...
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KisCachedHistogramObserver::Producers* source = m_source->m_source;
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QValueVector<vBins>& bins = m_source->m_bins;
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int channels = m_source->m_channels;
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int nrOfBins = m_source->m_nrOfBins;
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for (uint i = 0; i < count && !m_stop; i++) {
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KisHistogramProducer* p = source->at(i);
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m_source->m_count += p->count();
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for (int j = 0; j < channels && !m_stop; j++) {
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for (int k = 0; k < nrOfBins; k++) {
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bins.at(j).at(k) += p->getBinAt(j, k);
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}
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}
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}
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if (!m_stop) {
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// This function is thread-safe; and it takes ownership of the event
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QApplication::postEvent(m_source, new QCustomEvent(EmitCompletedType));
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}
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}
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void KisAccumulatingHistogramProducer::customEvent(QCustomEvent* e) {
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if (e->type() == EmitCompletedType) {
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emit completed();
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}
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}
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#include "kis_accumulating_producer.moc"
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