Loading counter

src/components/nikumaru.rs

@@ -1,9 +1,12 @@
+use byteorder::{ReadBytesExt, LE};
+
 use crate::common::Rect;
-use crate::components::draw_common::{Alignment, draw_number, draw_number_zeros};
+use crate::components::draw_common::{draw_number, draw_number_zeros, Alignment};
 use crate::entity::GameEntity;
 use crate::frame::Frame;
 use crate::framework::context::Context;
 use crate::framework::error::GameResult;
+use crate::framework::filesystem;
 use crate::player::Player;
 use crate::shared_game_state::{SharedGameState, TimingMode};
 
@@ -17,6 +20,43 @@ impl NikumaruCounter {
     pub fn new() -> NikumaruCounter {
         NikumaruCounter { tick: 0, shown: false }
     }
+
+    fn load_saved_time(&mut self, ctx: &mut Context) -> GameResult<u32> {
+        if let Ok(mut data) = filesystem::user_open(ctx, "/290.rec") {
+            let mut ticks: [u32; 4] = [0, 0, 0, 0];
+
+            for iter in 0..=3 {
+                ticks[iter] = data.read_u32::<LE>()?;
+            }
+
+            let random = data.read_u32::<LE>()?;
+            let random_list: [u8; 4] = random.to_le_bytes();
+
+            for iter in 0..=3 {
+                ticks[iter] = u32::from_le_bytes([
+                    ticks[iter].to_le_bytes()[0] - random_list[iter],
+                    ticks[iter].to_le_bytes()[1] - random_list[iter],
+                    ticks[iter].to_le_bytes()[2] - random_list[iter],
+                    ticks[iter].to_le_bytes()[3] - random_list[iter] / 2,
+                ]);
+            }
+
+            if ticks[0] == ticks[1] && ticks[0] == ticks[2] {
+                return Ok(ticks[0]);
+            }
+        } else {
+            log::warn!("Cannot open 290.rec.");
+        }
+        Ok(0)
+    }
+
+    pub fn load_counter(&mut self, ctx: &mut Context) -> GameResult {
+        self.tick = self.load_saved_time(ctx)? as usize;
+        if self.tick > 0 {
+            self.shown = true;
+        }
+        Ok(())
+    }
 }
 
 impl GameEntity<&Player> for NikumaruCounter {

src/scene/title_scene.rs

@@ -1,5 +1,7 @@
 use crate::common::{Color, VERSION_BANNER};
 use crate::components::background::Background;
+use crate::components::nikumaru::NikumaruCounter;
+use crate::entity::GameEntity;
 use crate::frame::Frame;
 use crate::framework::context::Context;
 use crate::framework::error::GameResult;
@@ -34,6 +36,7 @@ pub struct TitleScene {
     save_select_menu: Menu,
     background: Background,
     frame: Frame,
+    nikumaru_rec: NikumaruCounter,
     stage: Stage,
     textures: StageTexturePaths,
 }
@@ -67,6 +70,7 @@ impl TitleScene {
             save_select_menu: Menu::new(0, 0, 200, 0),
             background: Background::new(),
             frame: Frame::new(),
+            nikumaru_rec: NikumaruCounter::new(),
             stage: fake_stage,
             textures,
         }
@@ -117,6 +121,8 @@ impl Scene for TitleScene {
         self.controller.update(state, ctx)?;
         self.controller.update_trigger();
 
+        self.nikumaru_rec.load_counter(ctx)?;
+
         Ok(())
     }
 
@@ -211,6 +217,8 @@ impl Scene for TitleScene {
         self.draw_text_centered(&VERSION_BANNER, state.canvas_size.1 - 15.0, state, ctx)?;
         self.draw_text_centered(COPYRIGHT_PIXEL, state.canvas_size.1 - 30.0, state, ctx)?;
 
+        self.nikumaru_rec.draw(state, ctx, &self.frame)?;
+
         match self.current_menu {
             CurrentMenu::MainMenu => self.main_menu.draw(state, ctx)?,
             CurrentMenu::OptionMenu => self.option_menu.draw(state, ctx)?,