refactor file structure

src/examples/window.c

@@ -0,0 +1,53 @@
+#include <dangerzone/engine.h>
+#include <dangerzone/render/misc.h>
+#include <dangerzone/render/text.h>
+
+// polling events every frame
+void
+client_poll_event()
+{
+	SDL_Event ev = game_state->event;
+
+	if (ev.type == SDL_EVENT_QUIT) {
+		game_state->is_running = false;
+	}
+
+	if (ev.type == SDL_EVENT_KEY_DOWN) {
+		switch (ev.key.key) {
+		case SDLK_Q:
+			game_state->is_running = false;
+			break;
+		default:
+			break;
+		}
+	}
+}
+
+// performed every frame
+void
+client_update_framebuffer()
+{
+	// example window contents
+	clear_framebuffer(0xFFFF00);
+	put_string("Hello, traveller. You have come\nto the right place!",
+		20, 20, 2, 2, 3, 0x000000, 0xFFFF00
+	);
+}
+
+int 
+main()
+{
+	// initialize the engine
+	if (engine_init(
+		500, 100,
+		"Dangerzone",
+		client_poll_event,
+		client_update_framebuffer
+	)) {
+		engine_start();
+		engine_stop();
+		return 0;
+	} else {
+		return 1;
+	}
+}