finished prototype of nodes providing a texture to a viewer

app/node/processor/renderer/rendererthread.h

@@ -0,0 +1,68 @@
+/***
+
+  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/>.
+
+***/
+
+#ifndef RENDERTHREAD_H
+#define RENDERTHREAD_H
+
+#include <QMutex>
+#include <QOffscreenSurface>
+#include <QOpenGLContext>
+#include <QThread>
+#include <QWaitCondition>
+
+#include "node/node.h"
+#include "render/texturebuffer.h"
+
+class RendererThread : public QThread
+{
+public:
+  RendererThread();
+
+  QOpenGLContext* context();
+
+  TextureBuffer* buffer();
+
+  bool Queue(Node* n, const rational &time);
+
+  void Cancel();
+
+  virtual void run() override;
+
+private:
+  QOpenGLContext ctx_;
+
+  QOffscreenSurface surface_;
+
+  TextureBuffer buffer_;
+
+  QWaitCondition wait_cond_;
+
+  QMutex mutex_;
+
+  QMutex caller_mutex_;
+
+  Node* node_;
+
+  rational time_;
+
+  bool cancelled_;
+};
+
+#endif // RENDERTHREAD_H