add scaffold for 2048

Makefile

@@ -8,9 +8,11 @@ SRC := src/engine/engine.c \
 OUT := build/main
 SNAKE_SRC := src/examples/snake.c $(SRC)
 SNAKE := build/snake
+2048_SRC := src/examples/2048.c $(SRC)
+2048 := build/2048
 
 build:
-	$(CC) -o $(OUT) src/main.c $(SRC) $(INC) $(LIBS)
+	$(CC) -o $(OUT) -O3 -DNDEBUG src/main.c $(SRC) $(INC) $(LIBS)
 
 run:
 	$(OUT)
@@ -24,6 +26,15 @@ run-snake:
 clean-snake:
 	rm $(SNAKE)
 
+build-2048:
+	$(CC) -o $(2048) -O3 -DNDEBUG $(2048_SRC) $(INC) $(LIBS)
+
+run-2048:
+	$(2048)
+
+clean-2048:
+	rm $(2048)
+
 clean:
 	rm $(OUT)
 

src/examples/2048.c

@@ -0,0 +1,51 @@
+#include "engine.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()
+{
+	// single green demo pixel
+	game_state->framebuffer[0] = 0x00FF00;
+
+	put_rect(0, 0, 1100, 200, 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(
+		client_poll_event,
+		client_update_framebuffer
+	)) {
+		engine_start();
+		engine_stop();
+		return 0;
+	} else {
+		return 1;
+	}
+}