diff -r 11202097584f -r 745c73e0e644 qmlfrontend/hwengine.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/qmlfrontend/hwengine.h	Tue Nov 06 17:00:35 2018 +0100
@@ -0,0 +1,53 @@
+#ifndef HWENGINE_H
+#define HWENGINE_H
+
+#include <QList>
+#include <QObject>
+
+#include "flib.h"
+#include "gameconfig.h"
+
+class QQmlEngine;
+class PreviewImageProvider;
+class RunQueue;
+
+class HWEngine : public QObject {
+  Q_OBJECT
+
+  Q_PROPERTY(int previewHedgehogsCount READ previewHedgehogsCount NOTIFY
+                 previewHedgehogsCountChanged)
+
+ public:
+  explicit HWEngine(QQmlEngine* engine, QObject* parent = nullptr);
+  ~HWEngine();
+
+  static void exposeToQML();
+
+  Q_INVOKABLE void getPreview();
+  Q_INVOKABLE void runQuickGame();
+
+  int previewHedgehogsCount() const;
+
+ signals:
+  void previewIsRendering();
+  void previewImageChanged();
+  void previewHogCountChanged(int count);
+  void gameFinished();
+  void previewHedgehogsCountChanged(int previewHedgehogsCount);
+
+ private:
+  QQmlEngine* m_engine;
+  PreviewImageProvider* m_previewProvider;
+  RunQueue* m_runQueue;
+  GameConfig m_gameConfig;
+  QByteArray m_seed;
+  int m_previewHedgehogsCount;
+
+  static void guiMessagesCallback(void* context, MessageType mt,
+                                  const char* msg, uint32_t len);
+
+ private slots:
+  void engineMessageHandler(MessageType mt, const QByteArray& msg);
+};
+
+#endif  // HWENGINE_H