gui: Begin IPCPreviewWorker

gui/ipcpreviewworker.cpp

@@ -0,0 +1,31 @@
+#include <QtConcurrent>
+#include "ipcpreviewworker.h"
+#include "previewgeneratormapfunctor.h"
+IPCPreviewWorker::IPCPreviewWorker()
+{
+}
+
+void IPCPreviewWorker::start(RenderConfig config, const QVector<RenderTarget> &targets, QLocalSocket *peer)
+{
+	connect(&previewWorkerWatcher, &QFutureWatcher<QByteArray>::resultReadyAt, this,
+			[peer, this](int index)
+			{
+				QDataStream stream{peer};
+				stream << previewWorkerWatcher.resultAt(index);
+				peer->flush();
+			});
+	connect(&previewWorkerWatcher, &QFutureWatcher<QByteArray>::finished, this,
+			[peer]
+			{
+				/* TODO /
+
+				/*peer->waitForBytesWritten();
+				peer->disconnectFromServer();
+				peer->deleteLater();*/
+			});
+
+	auto mapFunctor = new PreviewGeneratorMapFunctor();
+	mapFunctor->setRenderConfig(config);
+
+	previewWorkerWatcher.setFuture(QtConcurrent::mapped(targets, *mapFunctor));
+}