extcam camera preview

widgets/cameraview_extcam.h

@@ -0,0 +1,31 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+* License, v. 2.0. If a copy of the MPL was not distributed with this
+* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#pragma once
+
+#include "stdafx.h"
+#include "uilayer.h"
+
+namespace ui
+{
+class cameraview_panel : public ui_panel
+{
+	std::atomic_bool exit_thread = true;
+	std::thread workthread;
+
+	uint8_t* image_ptr = nullptr;
+	std::mutex mutex;
+
+	std::optional<opengl_texture> texture;
+
+	void workthread_func();
+
+  public:
+	cameraview_panel();
+	~cameraview_panel();
+
+	void render() override;
+	void render_contents() override;
+};
+} // namespace ui