feat: shared blinking textures for power pellets

src/entity/edible.rs

@@ -4,6 +4,7 @@ use crate::entity::direction::Direction;
 use crate::entity::{Entity, Renderable, StaticEntity};
 use crate::map::Map;
 use crate::texture::atlas::AtlasTexture;
+use crate::texture::blinking::BlinkingTexture;
 use crate::texture::FrameDrawn;
 use glam::{IVec2, UVec2};
 use sdl2::{render::Canvas, video::Window};
@@ -17,19 +18,32 @@ pub enum EdibleKind {
     Fruit(FruitType),
 }
 
+pub enum EdibleSprite {
+    Pellet(Rc<Box<dyn FrameDrawn>>),
+    PowerPellet(Rc<RefCell<BlinkingTexture>>),
+}
+
 pub struct Edible {
     pub base: StaticEntity,
     pub kind: EdibleKind,
-    pub sprite: Rc<AtlasTexture>,
+    pub sprite: EdibleSprite,
 }
 
 impl Edible {
-    pub fn new(kind: EdibleKind, cell_position: UVec2, sprite: Rc<AtlasTexture>) -> Self {
+    pub fn new_pellet(cell_position: UVec2, sprite: Rc<Box<dyn FrameDrawn>>) -> Self {
         let pixel_position = Map::cell_to_pixel(cell_position);
         Edible {
             base: StaticEntity::new(pixel_position, cell_position),
-            kind,
-            sprite,
+            kind: EdibleKind::Pellet,
+            sprite: EdibleSprite::Pellet(sprite),
+        }
+    }
+    pub fn new_power_pellet(cell_position: UVec2, sprite: Rc<RefCell<BlinkingTexture>>) -> Self {
+        let pixel_position = Map::cell_to_pixel(cell_position);
+        Edible {
+            base: StaticEntity::new(pixel_position, cell_position),
+            kind: EdibleKind::PowerPellet,
+            sprite: EdibleSprite::PowerPellet(sprite),
         }
     }
 
@@ -48,16 +62,19 @@ impl Entity for Edible {
 impl Renderable for Edible {
     fn render(&self, canvas: &mut Canvas<Window>) {
         let pos = self.base.pixel_position;
-        self.sprite.render(canvas, pos, Direction::Right, Some(0));
+        match &self.sprite {
+            EdibleSprite::Pellet(sprite) => sprite.render(canvas, pos, Direction::Right, Some(0)),
+            EdibleSprite::PowerPellet(sprite) => sprite.borrow().render(canvas, pos, Direction::Right, Some(0)),
+        }
     }
 }
 
 /// Reconstruct all edibles from the original map layout
 pub fn reconstruct_edibles(
     map: Rc<RefCell<Map>>,
-    pellet_sprite: Rc<AtlasTexture>,
-    power_pellet_sprite: Rc<AtlasTexture>,
-    _fruit_sprite: Rc<AtlasTexture>,
+    pellet_sprite: Rc<Box<dyn FrameDrawn>>,
+    power_pellet_sprite: Rc<RefCell<BlinkingTexture>>,
+    _fruit_sprite: Rc<Box<dyn FrameDrawn>>,
 ) -> Vec<Edible> {
     let mut edibles = Vec::new();
     for x in 0..BOARD_WIDTH {
@@ -65,14 +82,10 @@ pub fn reconstruct_edibles(
             let tile = map.borrow().get_tile(IVec2::new(x as i32, y as i32));
             match tile {
                 Some(MapTile::Pellet) => {
-                    edibles.push(Edible::new(EdibleKind::Pellet, UVec2::new(x, y), Rc::clone(&pellet_sprite)));
+                    edibles.push(Edible::new_pellet(UVec2::new(x, y), Rc::clone(&pellet_sprite)));
                 }
                 Some(MapTile::PowerPellet) => {
-                    edibles.push(Edible::new(
-                        EdibleKind::PowerPellet,
-                        UVec2::new(x, y),
-                        Rc::clone(&power_pellet_sprite),
-                    ));
+                    edibles.push(Edible::new_power_pellet(UVec2::new(x, y), Rc::clone(&power_pellet_sprite)));
                 }
                 // Fruits can be added here if you have fruit positions
                 _ => {}

src/game.rs

@@ -26,6 +26,8 @@ use crate::entity::pacman::Pacman;
 use crate::entity::Renderable;
 use crate::map::Map;
 use crate::texture::atlas::{texture_to_static, AtlasTexture};
+use crate::texture::blinking::BlinkingTexture;
+use crate::texture::FrameDrawn;
 
 /// The main game state.
 ///
@@ -34,8 +36,8 @@ use crate::texture::atlas::{texture_to_static, AtlasTexture};
 pub struct Game {
     canvas: &'static mut Canvas<Window>,
     map_texture: Texture<'static>,
-    pellet_texture: Rc<AtlasTexture>,
-    power_pellet_texture: Rc<AtlasTexture>,
+    pellet_texture: Rc<Box<dyn FrameDrawn>>,
+    power_pellet_texture: Rc<RefCell<BlinkingTexture>>,
     font: Font<'static, 'static>,
     pacman: Rc<RefCell<Pacman>>,
     map: Rc<RefCell<Map>>,
@@ -92,7 +94,7 @@ impl Game {
         // Load pellet texture from asset API
         let pellet_bytes = get_asset_bytes(Asset::Pellet).expect("Failed to load asset");
         let power_pellet_bytes = get_asset_bytes(Asset::Energizer).expect("Failed to load asset");
-        let pellet_texture = Rc::new(AtlasTexture::new(
+        let pellet_texture: Rc<Box<dyn FrameDrawn>> = Rc::new(Box::new(AtlasTexture::new(
             unsafe {
                 texture_to_static(
                     texture_creator
@@ -104,20 +106,18 @@ impl Game {
             24,
             24,
             None,
-        ));
-        let power_pellet_texture = Rc::new(AtlasTexture::new(
-            unsafe {
-                texture_to_static(
+        )));
+        let power_pellet_texture = Rc::new(RefCell::new(BlinkingTexture::new(
             texture_creator
                 .load_texture_bytes(&power_pellet_bytes)
                 .expect("Could not load power pellet texture from asset API"),
-                )
-            },
             1,
             24,
             24,
             None,
-        ));
+            30, // on_ticks
+            9,  // off_ticks
+        )));
 
         // Load map texture from asset API
         let map_bytes = get_asset_bytes(Asset::Map).expect("Failed to load asset");
@@ -262,6 +262,9 @@ impl Game {
         self.blinky.body_sprite.tick();
         self.blinky.eyes_sprite.tick();
 
+        // Advance blinking for power pellets
+        self.power_pellet_texture.borrow_mut().tick();
+
         let pacman = self.pacman.borrow();
         let mut eaten_indices = vec![];
         for (i, edible) in self.edibles.iter().enumerate() {

src/texture/blinking.rs

@@ -0,0 +1,62 @@
+//! A texture that blinks on/off for a specified number of ticks.
+use glam::IVec2;
+use sdl2::{
+    render::{Canvas, Texture},
+    video::Window,
+};
+
+use crate::texture::atlas::AtlasTexture;
+use crate::texture::FrameDrawn;
+use crate::{entity::direction::Direction, texture::atlas::texture_to_static};
+
+pub struct BlinkingTexture {
+    pub atlas: AtlasTexture,
+    pub on_ticks: u32,
+    pub off_ticks: u32,
+    pub ticker: u32,
+    pub visible: bool,
+}
+
+impl BlinkingTexture {
+    pub fn new(
+        texture: Texture<'_>,
+        frame_count: u32,
+        width: u32,
+        height: u32,
+        offset: Option<IVec2>,
+        on_ticks: u32,
+        off_ticks: u32,
+    ) -> Self {
+        BlinkingTexture {
+            atlas: AtlasTexture::new(unsafe { texture_to_static(texture) }, frame_count, width, height, offset),
+            on_ticks,
+            off_ticks,
+            ticker: 0,
+            visible: true,
+        }
+    }
+
+    /// Advances the blinking state by one tick.
+    pub fn tick(&mut self) {
+        self.ticker += 1;
+        if self.visible && self.ticker >= self.on_ticks {
+            self.visible = false;
+            self.ticker = 0;
+        } else if !self.visible && self.ticker >= self.off_ticks {
+            self.visible = true;
+            self.ticker = 0;
+        }
+    }
+
+    pub fn set_color_modulation(&mut self, r: u8, g: u8, b: u8) {
+        self.atlas.set_color_modulation(r, g, b);
+    }
+}
+
+impl FrameDrawn for BlinkingTexture {
+    fn render(&self, canvas: &mut Canvas<Window>, position: IVec2, direction: Direction, frame: Option<u32>) {
+        if self.visible {
+            self.atlas.render(canvas, position, direction, frame);
+        }
+    }
+}

src/texture/mod.rs

@@ -10,3 +10,4 @@ pub trait FrameDrawn {
 
 pub mod animated;
 pub mod atlas;
+pub mod blinking;