moved all sources into src directory

src/ScreensaverPlugin.hpp

@@ -0,0 +1,38 @@
+//
+// ScreensaverPlugin.hpp
+// screensaver
+//
+// Created by Bob Polis at 2020-10-26
+// Copyright (c) 2020 SwiftCoder. All rights reserved.
+//
+
+#ifndef _ScreensaverPlugin_H_
+#define _ScreensaverPlugin_H_
+
+#include <cairo/cairo.h>
+#include <random>
+
+class ScreensaverPlugin {
+    public:
+        ScreensaverPlugin() = default;
+        virtual ~ScreensaverPlugin() = default;
+
+        virtual void setup(cairo_t* context, const cairo_rectangle_t& rect);
+        virtual int fps() const;
+
+        virtual void draw_frame() = 0;
+
+    protected:
+        cairo_t* _c {nullptr};
+        cairo_rectangle_t _r {};
+        std::random_device _dev {};
+        std::default_random_engine _eng {_dev()};
+
+        void make_black();
+        cairo_rectangle_t random_rect();
+        double random_x();
+        double random_y();
+        double random01();
+};
+
+#endif // _ScreensaverPlugin_H_