src/core/app.rs

   1 use boll::*;
   2 use common::{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 pub type Nanoseconds = u64;
  19
  20 const FPS: u32 = 60;
  21 const NS_PER_FRAME: u32 = 1_000_000_000 / FPS;
  22
  23 #[derive(Default)]
  24 pub struct AppBuilder {
  25     resolution: Rect<u16>,
  26     state: Option<Box<dyn AppState>>,
  27     title: Option<String>,
  28 }
  29
  30 impl AppBuilder {
  31     pub fn with_resolution(mut self, width: u16, height: u16) -> Self {
  32         self.resolution = Rect { width, height };
  33         self
  34     }
  35
  36     pub fn with_state(mut self, state: Box<dyn AppState>) -> Self {
  37         self.state = Some(state);
  38         self
  39     }
  40
  41     pub fn with_title(mut self, title: &str) -> Self {
  42         self.title = Some(title.to_string());
  43         self
  44     }
  45
  46     pub fn build(self) -> Result<App, String> {
  47         let context = sdl2::init().unwrap();
  48         sdl2::image::init(sdl2::image::InitFlag::PNG)?;
  49         let video = context.video()?;
  50         self.print_video_display_modes(&video);
  51
  52         let window = video
  53             .window(
  54                 &self.title.unwrap(),
  55                 self.resolution.width.into(),
  56                 self.resolution.height.into(),
  57             )
  58             .position_centered()
  59             // .fullscreen()
  60             // .fullscreen_desktop()
  61             .opengl()
  62             .build()
  63             .unwrap();
  64         context.mouse().show_cursor(false);
  65
  66         let mut canvas = window.into_canvas().build().unwrap();
  67         canvas.set_blend_mode(BlendMode::Add);
  68         canvas.set_draw_color(Color::RGB(0, 0, 0));
  69         canvas.clear();
  70         canvas.present();
  71
  72         video.gl_set_swap_interval(SwapInterval::VSync)?;
  73
  74         let event_pump = context.event_pump()?;
  75         let sprites = SpriteManager::new(canvas.texture_creator());
  76         let screen = canvas.output_size().unwrap();
  77         let ctrl = context.game_controller()?;
  78         ctrl.set_event_state(true);
  79
  80         Ok(App {
  81             canvas,
  82             event_pump,
  83             sprites,
  84             state: self.state.unwrap_or_else(|| Box::new(ActiveState::new(screen))),
  85             ctrl_man: ControllerManager::new(ctrl, context.haptic()?),
  86         })
  87     }
  88
  89     fn print_video_display_modes(&self, video: &VideoSubsystem) {
  90         println!("video subsystem: {:?}", video);
  91         println!("current_video_driver: {:?}", video.current_video_driver());
  92         for display in 0..video.num_video_displays().unwrap() {
  93             println!(
  94                 "=== display {} - {} ===",
  95                 display,
  96                 video.display_name(display).unwrap()
  97             );
  98             println!(
  99                 " display_bounds: {:?}",
 100                 video.display_bounds(display).unwrap()
 101             );
 102             println!(
 103                 " num_display_modes: {:?}",
 104                 video.num_display_modes(display).unwrap()
 105             );
 106             println!(
 107                 " desktop_display_mode: {:?}",
 108                 video.desktop_display_mode(display).unwrap()
 109             );
 110             let current = video.current_display_mode(display).unwrap();
 111             println!(
 112                 " current_display_mode: {:?}",
 113                 current
 114             );
 115             for idx in 0..video.num_display_modes(display).unwrap() {
 116                 let mode = video.display_mode(display, idx).unwrap();
 117                 println!(
 118                     " {}{:2}: {:?}",
 119                     if mode == current { "*" } else { " " },
 120                     idx,
 121                     mode
 122                 );
 123             }
 124         }
 125         println!("swap interval: {:?}", video.gl_get_swap_interval());
 126     }
 127 }
 128
 129 pub struct App {
 130     pub canvas: Canvas<Window>,
 131     pub event_pump: EventPump,
 132     pub sprites: SpriteManager,
 133     pub state: Box<dyn AppState>,
 134     pub ctrl_man: ControllerManager,
 135 }
 136
 137 impl App {
 138     #[allow(clippy::new_ret_no_self)]
 139     pub fn new() -> AppBuilder {
 140         Default::default()
 141     }
 142
 143     pub fn load_sprites(&mut self, sprites: &[(&str, &str)]) {
 144         for (name, file) in sprites {
 145             self.sprites.load(name, file);
 146         }
 147     }
 148
 149     pub fn start(&mut self) {
 150         let mut frame_count: u64 = 0;
 151         let mut fps_time = PreciseTime::now();
 152         let mut last_time = PreciseTime::now();
 153
 154         'running: loop {
 155             if let Err(_) = self.handle_events() {
 156                 break 'running;
 157             }
 158
 159             let duration =
 160                 last_time.to(PreciseTime::now()).num_nanoseconds().unwrap() as Nanoseconds;
 161             last_time = PreciseTime::now();
 162             self.state.update(duration);
 163
 164             self.render();
 165
 166             frame_count += 1;
 167             if frame_count == FPS as u64 {
 168                 let duration = fps_time.to(PreciseTime::now()).num_nanoseconds().unwrap() as f64
 169                     / 1_000_000_000.0;
 170                 // println!("fps: {}", frame_count as f64 / duration);
 171                 frame_count = 0;
 172                 fps_time = PreciseTime::now();
 173             }
 174         }
 175
 176         self.state.leave();
 177     }
 178
 179     fn handle_events(&mut self) -> Result<(), ()> {
 180         for event in self.event_pump.poll_iter() {
 181             self.ctrl_man.handle_event(&event);
 182             match event {
 183                 Event::ControllerButtonDown { .. } => {
 184                     let c = self.ctrl_man.controllers[0].clone();
 185                     c.rumble(0.75, 100);
 186                 }
 187                 Event::Quit { .. }
 188                 | Event::KeyDown {
 189                     keycode: Some(Keycode::Escape),
 190                     ..
 191                 } => {
 192                     return Err(())
 193                 }
 194                 Event::KeyDown {
 195                     keycode: Some(Keycode::F11),
 196                     ..
 197                 } => {
 198                     match self.canvas.window().fullscreen_state() {
 199                         FullscreenType::Off => self
 200                             .canvas
 201                             .window_mut()
 202                             .set_fullscreen(FullscreenType::Desktop),
 203                         _ => self.canvas.window_mut().set_fullscreen(FullscreenType::Off),
 204                     }
 205                     .unwrap();
 206                 }
 207                 Event::Window {
 208                     win_event: WindowEvent::Resized(x, y),
 209                     ..
 210                 } => {
 211                     println!("window resized({}, {})", x, y)
 212                 }
 213                 Event::Window {
 214                     win_event: WindowEvent::Maximized,
 215                     ..
 216                 } => {
 217                     println!("window maximized")
 218                 }
 219                 Event::Window {
 220                     win_event: WindowEvent::Restored,
 221                     ..
 222                 } => {
 223                     println!("window restored")
 224                 }
 225                 Event::Window {
 226                     win_event: WindowEvent::Enter,
 227                     ..
 228                 } => {
 229                     println!("window enter")
 230                 }
 231                 Event::Window {
 232                     win_event: WindowEvent::Leave,
 233                     ..
 234                 } => {
 235                     println!("window leave")
 236                 }
 237                 Event::Window {
 238                     win_event: WindowEvent::FocusGained,
 239                     ..
 240                 } => {
 241                     println!("window focus gained")
 242                 }
 243                 Event::Window {
 244                     win_event: WindowEvent::FocusLost,
 245                     ..
 246                 } => {
 247                     println!("window focus lost")
 248                 }
 249                 _ => self.state.on_event(event),
 250             }
 251         }
 252         Ok(())
 253     }
 254
 255     fn render(&mut self) {
 256         self.canvas.set_draw_color(Color::RGB(0, 0, 0));
 257         self.canvas.clear();
 258         self.state.render(&mut self.canvas, &mut self.sprites);
 259         self.canvas.present();
 260     }
 261 }
 262
 263 pub trait AppState {
 264     fn update(&mut self, dt: Nanoseconds);
 265     fn render(&mut self, canvas: &mut Canvas<Window>, sprites: &mut SpriteManager);
 266     fn leave(&self);
 267     fn on_event(&mut self, event: Event);
 268 }
 269
 270 type Bollar = Vec<Box<dyn Boll>>;
 271
 272 #[derive(Default)]
 273 pub struct ActiveState {
 274     screen: Rect<u32>,
 275     bolls: Bollar,
 276     boll_size: u32,
 277     mario_angle: f64,
 278 }
 279
 280 impl ActiveState {
 281     pub fn new(screen: (u32, u32)) -> ActiveState {
 282         ActiveState {
 283             bolls: Bollar::new(),
 284             boll_size: 1,
 285             screen: Rect::from(screen),
 286             ..Default::default()
 287         }
 288     }
 289
 290     fn change_boll_count(&mut self, delta: i32) {
 291         #[allow(clippy::comparison_chain)]
 292         if delta > 0 {
 293             for _i in 0..delta {
 294                 self.add_boll();
 295             }
 296         } else if delta < 0 {
 297             for _i in 0..(-delta) {
 298                 self.bolls.pop();
 299             }
 300         }
 301     }
 302
 303     fn add_boll(&mut self) {
 304         let mut rng = rand::thread_rng();
 305         self.bolls.push(Box::new(SquareBoll {
 306             pos: point!(
 307                 rng.gen_range(0, self.screen.width) as f64,
 308                 rng.gen_range(0, self.screen.height) as f64
 309             ),
 310             vel: point!(rng.gen_range(-2.0, 2.0), rng.gen_range(-2.0, 2.0)),
 311         }));
 312     }
 313 }
 314
 315 impl AppState for ActiveState {
 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(&self) {
 434         println!("number of bolls: {}", self.bolls.len());
 435     }
 436
 437     fn on_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 }