src/core/app.rs

   1 use boll::*;
   2 use common::{Nanoseconds, Point2D, Rect};
   3 use core::controller::ControllerManager;
   4 use point; // defined in common, but loaded from main...
   5 use rand::Rng;
   6 use sdl2::event::{Event, WindowEvent};
   7 use sdl2::gfx::primitives::DrawRenderer;
   8 use sdl2::keyboard::Keycode;
   9 use sdl2::pixels::Color;
  10 use sdl2::rect::Rect as SDLRect;
  11 use sdl2::render::{BlendMode, Canvas};
  12 use sdl2::video::{FullscreenType, SwapInterval, Window};
  13 use sdl2::{EventPump, VideoSubsystem};
  14 use sprites::SpriteManager;
  15 use std::f32::consts::PI;
  16 use time::PreciseTime;
  17
  18 const FPS: u32 = 60;
  19 const NS_PER_FRAME: u32 = 1_000_000_000 / FPS;
  20
  21 #[derive(Default)]
  22 pub struct AppBuilder {
  23     resolution: Rect<u16>,
  24     state: Option<Box<dyn AppState>>,
  25     title: Option<String>,
  26 }
  27
  28 impl AppBuilder {
  29     pub fn with_resolution(mut self, width: u16, height: u16) -> Self {
  30         self.resolution = Rect { width, height };
  31         self
  32     }
  33
  34     pub fn with_state(mut self, state: Box<dyn AppState>) -> Self {
  35         self.state = Some(state);
  36         self
  37     }
  38
  39     pub fn with_title(mut self, title: &str) -> Self {
  40         self.title = Some(title.to_string());
  41         self
  42     }
  43
  44     pub fn build(self) -> Result<App, String> {
  45         let context = sdl2::init().unwrap();
  46         sdl2::image::init(sdl2::image::InitFlag::PNG)?;
  47         let video = context.video()?;
  48         //self.print_video_display_modes(&video);
  49
  50         let window = video
  51             .window(
  52                 &self.title.unwrap(),
  53                 self.resolution.width.into(),
  54                 self.resolution.height.into(),
  55             )
  56             .position_centered()
  57             // .fullscreen()
  58             // .fullscreen_desktop()
  59             .opengl()
  60             .build()
  61             .unwrap();
  62         context.mouse().show_cursor(false);
  63
  64         let mut canvas = window.into_canvas().build().unwrap();
  65         canvas.set_blend_mode(BlendMode::Add);
  66         canvas.set_draw_color(Color::RGB(0, 0, 0));
  67         canvas.clear();
  68         canvas.present();
  69
  70         video.gl_set_swap_interval(SwapInterval::VSync)?;
  71
  72         let event_pump = context.event_pump()?;
  73         let sprites = SpriteManager::new(canvas.texture_creator());
  74         let screen = canvas.output_size().unwrap();
  75         let ctrl = context.game_controller()?;
  76         ctrl.set_event_state(true);
  77
  78         Ok(App {
  79             canvas,
  80             event_pump,
  81             sprites,
  82             state: self.state.unwrap_or_else(|| Box::new(ActiveState::new(screen))),
  83             ctrl_man: ControllerManager::new(ctrl, context.haptic()?),
  84         })
  85     }
  86
  87     #[allow(dead_code)]
  88     fn print_video_display_modes(&self, video: &VideoSubsystem) {
  89         println!("video subsystem: {:?}", video);
  90         println!("current_video_driver: {:?}", video.current_video_driver());
  91         for display in 0..video.num_video_displays().unwrap() {
  92             println!(
  93                 "=== display {} - {} ===",
  94                 display,
  95                 video.display_name(display).unwrap()
  96             );
  97             println!(
  98                 " display_bounds: {:?}",
  99                 video.display_bounds(display).unwrap()
 100             );
 101             println!(
 102                 " num_display_modes: {:?}",
 103                 video.num_display_modes(display).unwrap()
 104             );
 105             println!(
 106                 " desktop_display_mode: {:?}",
 107                 video.desktop_display_mode(display).unwrap()
 108             );
 109             let current = video.current_display_mode(display).unwrap();
 110             println!(
 111                 " current_display_mode: {:?}",
 112                 current
 113             );
 114             for idx in 0..video.num_display_modes(display).unwrap() {
 115                 let mode = video.display_mode(display, idx).unwrap();
 116                 println!(
 117                     " {}{:2}: {:?}",
 118                     if mode == current { "*" } else { " " },
 119                     idx,
 120                     mode
 121                 );
 122             }
 123         }
 124         println!("swap interval: {:?}", video.gl_get_swap_interval());
 125     }
 126 }
 127
 128 pub struct App {
 129     canvas: Canvas<Window>,
 130     event_pump: EventPump,
 131     sprites: SpriteManager,
 132     state: Box<dyn AppState>,
 133     pub ctrl_man: ControllerManager,
 134 }
 135
 136 impl App {
 137     #[allow(clippy::new_ret_no_self)]
 138     pub fn new() -> AppBuilder {
 139         Default::default()
 140     }
 141
 142     pub fn load_sprites(&mut self, sprites: &[(&str, &str)]) {
 143         for (name, file) in sprites {
 144             self.sprites.load(name, file);
 145         }
 146     }
 147
 148     pub fn start(&mut self) {
 149         // let mut frame_count: u64 = 0;
 150         // let mut fps_time = PreciseTime::now();
 151         let mut last_time = PreciseTime::now();
 152
 153         self.state.enter(&mut self.ctrl_man);
 154
 155         'running: loop {
 156             if let Err(_) = self.handle_events() {
 157                 break 'running;
 158             }
 159
 160             let duration =
 161                 last_time.to(PreciseTime::now()).num_nanoseconds().unwrap() as Nanoseconds;
 162             last_time = PreciseTime::now();
 163             self.state.update(duration);
 164
 165             self.render();
 166
 167             // frame_count += 1;
 168             // if frame_count == FPS as u64 {
 169             //     let duration = fps_time.to(PreciseTime::now()).num_nanoseconds().unwrap() as f64
 170             //         / 1_000_000_000.0;
 171             //     // println!("fps: {}", frame_count as f64 / duration);
 172             //     frame_count = 0;
 173             //     fps_time = PreciseTime::now();
 174             // }
 175         }
 176
 177         self.state.leave();
 178     }
 179
 180     fn handle_events(&mut self) -> Result<(), ()> {
 181         for event in self.event_pump.poll_iter() {
 182             self.ctrl_man.handle_event(&event);
 183             match event {
 184                 Event::Quit { .. }
 185                 | Event::KeyDown {
 186                     keycode: Some(Keycode::Escape),
 187                     ..
 188                 } => {
 189                     return Err(())
 190                 }
 191                 Event::KeyDown {
 192                     keycode: Some(Keycode::F11),
 193                     ..
 194                 } => {
 195                     match self.canvas.window().fullscreen_state() {
 196                         FullscreenType::Off => self
 197                             .canvas
 198                             .window_mut()
 199                             .set_fullscreen(FullscreenType::Desktop),
 200                         _ => self.canvas.window_mut().set_fullscreen(FullscreenType::Off),
 201                     }
 202                     .unwrap();
 203                 }
 204                 Event::Window {
 205                     win_event: WindowEvent::Resized(x, y),
 206                     ..
 207                 } => {
 208                     println!("window resized({}, {})", x, y)
 209                 }
 210                 Event::Window {
 211                     win_event: WindowEvent::Maximized,
 212                     ..
 213                 } => {
 214                     println!("window maximized")
 215                 }
 216                 Event::Window {
 217                     win_event: WindowEvent::Restored,
 218                     ..
 219                 } => {
 220                     println!("window restored")
 221                 }
 222                 Event::Window {
 223                     win_event: WindowEvent::Enter,
 224                     ..
 225                 } => {
 226                     println!("window enter")
 227                 }
 228                 Event::Window {
 229                     win_event: WindowEvent::Leave,
 230                     ..
 231                 } => {
 232                     println!("window leave")
 233                 }
 234                 Event::Window {
 235                     win_event: WindowEvent::FocusGained,
 236                     ..
 237                 } => {
 238                     println!("window focus gained")
 239                 }
 240                 Event::Window {
 241                     win_event: WindowEvent::FocusLost,
 242                     ..
 243                 } => {
 244                     println!("window focus lost")
 245                 }
 246                 _ => self.state.handle_event(event),
 247             }
 248         }
 249         Ok(())
 250     }
 251
 252     fn render(&mut self) {
 253         self.canvas.set_draw_color(Color::RGB(0, 0, 0));
 254         self.canvas.clear();
 255         self.state.render(&mut self.canvas, &mut self.sprites);
 256         self.canvas.present();
 257     }
 258 }
 259
 260 pub trait AppState {
 261     fn enter(&mut self, ctrl_man: &mut ControllerManager);
 262     fn leave(&mut self);
 263     fn update(&mut self, dt: Nanoseconds);
 264     fn render(&mut self, canvas: &mut Canvas<Window>, sprites: &mut SpriteManager);
 265     fn handle_event(&mut self, event: Event);
 266 }
 267
 268 type Bollar = Vec<Box<dyn Boll>>;
 269
 270 #[derive(Default)]
 271 pub struct ActiveState {
 272     screen: Rect<u32>,
 273     bolls: Bollar,
 274     boll_size: u32,
 275     mario_angle: f64,
 276 }
 277
 278 impl ActiveState {
 279     pub fn new(screen: (u32, u32)) -> ActiveState {
 280         ActiveState {
 281             bolls: Bollar::new(),
 282             boll_size: 1,
 283             screen: Rect::from(screen),
 284             ..Default::default()
 285         }
 286     }
 287
 288     fn change_boll_count(&mut self, delta: i32) {
 289         #[allow(clippy::comparison_chain)]
 290         if delta > 0 {
 291             for _i in 0..delta {
 292                 self.add_boll();
 293             }
 294         } else if delta < 0 {
 295             for _i in 0..(-delta) {
 296                 self.bolls.pop();
 297             }
 298         }
 299     }
 300
 301     fn add_boll(&mut self) {
 302         let mut rng = rand::thread_rng();
 303         self.bolls.push(Box::new(SquareBoll {
 304             pos: point!(
 305                 rng.gen_range(0, self.screen.width) as f64,
 306                 rng.gen_range(0, self.screen.height) as f64
 307             ),
 308             vel: point!(rng.gen_range(-2.0, 2.0), rng.gen_range(-2.0, 2.0)),
 309         }));
 310     }
 311 }
 312
 313 impl AppState for ActiveState {
 314     fn enter(&mut self, ctrl_man: &mut ControllerManager) {}
 315
 316     fn update(&mut self, dt: Nanoseconds) {
 317         for b in &mut self.bolls {
 318             b.update();
 319         }
 320
 321         match dt {
 322             ns if ns < (NS_PER_FRAME - 90_0000) as u64 => self.change_boll_count(100),
 323             ns if ns > (NS_PER_FRAME + 90_0000) as u64 => self.change_boll_count(-100),
 324             _ => {}
 325         }
 326     }
 327
 328     fn render(&mut self, canvas: &mut Canvas<Window>, sprites: &mut SpriteManager) {
 329         /* draw square of blocks */ {
 330             let blocks = 20;
 331             let size = 32;
 332             let offset = point!(
 333                 (self.screen.width as i32 - (blocks + 1) * size) / 2,
 334                 (self.screen.height as i32 - (blocks + 1) * size) / 2
 335             );
 336             let block = sprites.get("block");
 337             for i in 0..blocks {
 338                 canvas
 339                     .copy(
 340                         block,
 341                         None,
 342                         SDLRect::new((i) * size + offset.x, offset.y, size as u32, size as u32),
 343                     )
 344                     .unwrap();
 345                 canvas
 346                     .copy(
 347                         block,
 348                         None,
 349                         SDLRect::new(
 350                             (blocks - i) * size + offset.x,
 351                             (blocks) * size + offset.y,
 352                             size as u32,
 353                             size as u32,
 354                         ),
 355                     )
 356                     .unwrap();
 357                 canvas
 358                     .copy(
 359                         block,
 360                         None,
 361                         SDLRect::new(
 362                             offset.x,
 363                             (blocks - i) * size + offset.y,
 364                             size as u32,
 365                             size as u32,
 366                         ),
 367                     )
 368                     .unwrap();
 369                 canvas
 370                     .copy(
 371                         block,
 372                         None,
 373                         SDLRect::new(
 374                             (blocks) * size + offset.x,
 375                             (i) * size + offset.y,
 376                             size as u32,
 377                             size as u32,
 378                         ),
 379                     )
 380                     .unwrap();
 381             }
 382         }
 383
 384         /* draw mario */ {
 385             let size = 64;
 386             let offset = point!(
 387                 (self.screen.width as i32 - size) / 2,
 388                 (self.screen.height as i32 - size) / 2
 389             );
 390             let radius = 110.0 + size as f32 * 0.5;
 391             let angle = (self.mario_angle as f32 - 90.0) * PI / 180.0;
 392             let offset2 = point!((angle.cos() * radius) as i32, (angle.sin() * radius) as i32);
 393             canvas
 394                 .copy_ex(
 395                     sprites.get("mario"),
 396                     None,
 397                     SDLRect::new(
 398                         offset.x + offset2.x,
 399                         offset.y + offset2.y,
 400                         size as u32,
 401                         size as u32,
 402                     ),
 403                     self.mario_angle,
 404                     sdl2::rect::Point::new(size / 2, size / 2),
 405                     false,
 406                     false,
 407                 )
 408                 .unwrap();
 409             self.mario_angle = (self.mario_angle + 1.0) % 360.0;
 410         }
 411
 412         /* draw circles and ellipses*/ {
 413             let p = point!((self.screen.width / 2) as i16, (self.screen.height / 2) as i16);
 414             canvas
 415                 .circle(p.x, p.y, 100, Color::RGB(255, 255, 255))
 416                 .unwrap();
 417             canvas
 418                 .aa_circle(p.x, p.y, 110, Color::RGB(255, 255, 255))
 419                 .unwrap();
 420             canvas
 421                 .ellipse(p.x, p.y, 50, 100, Color::RGB(255, 255, 255))
 422                 .unwrap();
 423             canvas
 424                 .aa_ellipse(p.x, p.y, 110, 55, Color::RGB(255, 255, 255))
 425                 .unwrap();
 426         }
 427
 428         for b in &self.bolls {
 429             b.draw(canvas, self.boll_size);
 430         }
 431     }
 432
 433     fn leave(&mut self) {
 434         println!("number of bolls: {}", self.bolls.len());
 435     }
 436
 437     fn handle_event(&mut self, event: Event) {
 438         match event {
 439             Event::KeyDown {
 440                 keycode: Some(Keycode::KpPlus),
 441                 ..
 442             } => self.boll_size = std::cmp::min(self.boll_size + 1, 32),
 443             Event::KeyDown {
 444                 keycode: Some(Keycode::KpMinus),
 445                 ..
 446             } => self.boll_size = std::cmp::max(self.boll_size - 1, 1),
 447             Event::MouseMotion { x, y, .. } => self.bolls.push(Box::new(CircleBoll::new(
 448                 point!(x as f64, y as f64),
 449                 point!(0.0, 0.0),
 450             ))),
 451             _ => {}
 452         }
 453     }
 454 }