72 lines
1.7 KiB
C++
72 lines
1.7 KiB
C++
#include "worker.hpp"
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#include <chrono>
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#include <thread>
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Worker *Worker::inst = 0;
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QMutex Worker::workerLock;
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QMutex Worker::lock;
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// QPixmaps don't like existing on non GUI threads.
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// Because of this we have to:
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// 1. Convert to image on the GUI thread
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// 2. Queue onto the worker, where:
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// 1. Convert the image to the right format
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// 2. Consume the image.
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void Worker::queue(WorkerContext *context) {
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QMutexLocker ml(&lock);
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_WorkerContext *c = new _WorkerContext;
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c->image = context->pixmap.toImage();
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c->consumer = context->consumer;
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c->targetFormat = context->targetFormat;
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c->underlyingThing = context;
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inst->qqueue.enqueue(c);
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}
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void Worker::init() {
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QMutexLocker ml(&workerLock);
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if (!inst) inst = new Worker;
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}
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Worker::Worker() : QObject() {
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thr = new QThread;
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moveToThread(thr);
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connect(thr, &QThread::started, this, &Worker::process);
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connect(thr, &QThread::finished, thr, &QThread::deleteLater);
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connect(this, &Worker::finished, this, &Worker::deleteLater);
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connect(thr, &QThread::finished, thr, &QThread::deleteLater);
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thr->start();
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}
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Worker::~Worker() {
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_end();
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}
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void Worker::end() {
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inst->_end();
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}
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void Worker::_end() {
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QMutexLocker ml(&endLock);
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_ended = true;
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}
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bool Worker::ended() {
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QMutexLocker ml(&endLock);
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return _ended;
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}
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void Worker::process() {
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while (!ended()) {
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lock.lock();
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if (!qqueue.isEmpty()) {
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_WorkerContext *c = qqueue.dequeue();
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c->consumer(c->image.convertToFormat(c->targetFormat));
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delete c->underlyingThing;
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delete c;
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}
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lock.unlock();
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std::this_thread::sleep_for(std::chrono::milliseconds(10)); // STL likes it's scopes
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}
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emit finished();
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}
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