feat: atlas texture, animated sprite management

src/animation.rs

@@ -0,0 +1,53 @@
+use sdl2::{
+    rect::Rect,
+    render::{Canvas, Texture},
+    video::Window,
+};
+
+pub struct AnimatedTexture<'a> {
+    raw_texture: &'a Texture<'a>,
+    current_frame: u32,
+    frame_count: u32,
+    frame_width: u32,
+    frame_height: u32,
+}
+
+impl<'a> AnimatedTexture<'a> {
+    pub fn new(
+        texture: &'a Texture<'a>,
+        frame_count: u32,
+        frame_width: u32,
+        frame_height: u32,
+    ) -> Self {
+        AnimatedTexture {
+            raw_texture: texture,
+            current_frame: 0,
+            frame_count,
+            frame_width,
+            frame_height,
+        }
+    }
+
+    fn next_frame(&mut self) {
+        self.current_frame = (self.current_frame + 1) % self.frame_count;
+    }
+
+    fn get_frame_rect(&self) -> Rect {
+        Rect::new(
+            (self.current_frame * self.frame_width) as i32,
+            0,
+            self.frame_width,
+            self.frame_height,
+        )
+    }
+
+    pub fn render(&mut self, canvas: &mut Canvas<Window>, position: (i32, i32)) {
+        let frame_rect = self.get_frame_rect();
+        let position_rect = Rect::new(position.0, position.1, self.frame_width, self.frame_height);
+        canvas
+            .copy(&self.raw_texture, frame_rect, position_rect)
+            .expect("Could not render sprite on canvas");
+
+            self.next_frame();
+    }
+}