allow public uses of structs; add sample program

src/bin/smiley.rs

@@ -0,0 +1,32 @@
+extern crate bitsy_parser;
+use std::{env, fs};
+use bitsy_parser::game::Game;
+use bitsy_parser::image::Image;
+
+/// replaces the player avatar with a smiley face.
+fn main() {
+    let input_file = env::args().nth(1)
+        .expect("No game data specified. Usage: `invert infile outfile`");
+    let output_file = env::args().nth(2)
+        .expect("No game data specified. Usage: `invert infile outfile`");
+
+    let mut game = Game::from(fs::read_to_string(input_file).unwrap());
+
+    game.avatar.animation_frames = vec![
+        Image {
+            pixels: vec![
+                0,0,1,1,1,1,0,0,
+                0,1,1,1,1,1,1,0,
+                1,1,0,1,1,0,1,1,
+                1,1,0,1,1,0,1,1,
+                1,1,1,1,1,1,1,1,
+                1,1,0,1,1,0,1,1,
+                0,1,1,0,0,1,1,0,
+                0,0,1,1,1,1,0,0,
+            ]
+        }
+    ];
+
+    fs::write(output_file, &game.to_string())
+        .expect("Failed to write to output file");
+}