finished prototype of nodes providing a texture to a viewer

app/node/processor/renderer/renderer.cpp

@@ -0,0 +1,80 @@
+/***
+
+  Olive - Non-Linear Video Editor
+  Copyright (C) 2019 Olive Team
+
+  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 3 of the License, 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.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+***/
+
+#include "renderer.h"
+
+RendererProcessor::RendererProcessor(QObject *parent) :
+  Node(parent),
+  started_(false)
+{
+
+}
+
+QString RendererProcessor::Name()
+{
+  return tr("Renderer");
+}
+
+QString RendererProcessor::Category()
+{
+  return tr("Processor");
+}
+
+QString RendererProcessor::Description()
+{
+  return tr("A multi-threaded OpenGL hardware-accelerated node compositor.");
+}
+
+void RendererProcessor::Start()
+{
+  if (started_) {
+    return;
+  }
+
+  threads_.resize(QThread::idealThreadCount());
+
+  for (int i=0;i<threads_.size();i++) {
+    threads_[i] = new RendererThread();
+    threads_[i]->run();
+  }
+
+  started_ = true;
+}
+
+void RendererProcessor::Stop()
+{
+  if (!started_) {
+    return;
+  }
+
+  started_ = false;
+
+  for (int i=0;i<threads_.size();i++) {
+    threads_[i]->Cancel();
+    delete threads_[i];
+  }
+
+  threads_.clear();
+}
+
+RendererThread *RendererProcessor::CurrentThread()
+{
+  return dynamic_cast<RendererThread*>(QThread::currentThread());
+}