2 use common::{Point2D, Rect};
3 use point; // defined in common, but loaded from main...
5 use sdl2::event::{Event, WindowEvent};
6 use sdl2::gfx::primitives::DrawRenderer;
7 use sdl2::keyboard::Keycode;
8 use sdl2::pixels::Color;
9 use sdl2::rect::Rect as SDLRect;
10 use sdl2::render::{BlendMode, Canvas};
11 use sdl2::video::{FullscreenType, SwapInterval, Window};
12 use sdl2::{EventPump, VideoSubsystem};
13 use sprites::SpriteManager;
14 use std::f32::consts::PI;
15 use time::PreciseTime;
17 pub type Nanoseconds = u64;
20 const NS_PER_FRAME: u32 = 1_000_000_000 / FPS;
23 pub struct AppBuilder {
24 resolution: Rect<u16>,
25 state: Option<Box<dyn AppState>>,
26 title: Option<String>,
30 pub fn with_resolution(mut self, width: u16, height: u16) -> Self {
31 self.resolution = Rect { width, height };
35 pub fn with_state(mut self, state: Box<dyn AppState>) -> Self {
36 self.state = Some(state);
40 pub fn with_title(mut self, title: &str) -> Self {
41 self.title = Some(title.to_string());
45 pub fn build(self) -> Result<App, String> {
46 let context = sdl2::init().unwrap();
47 sdl2::image::init(sdl2::image::InitFlag::PNG)?;
48 let video = context.video()?;
50 self.print_video_display_modes(&video);
55 self.resolution.width.into(),
56 self.resolution.height.into(),
60 // .fullscreen_desktop()
64 context.mouse().show_cursor(false);
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));
72 video.gl_set_swap_interval(SwapInterval::VSync)?;
74 let event_pump = context.event_pump()?;
75 let sprites = SpriteManager::new(canvas.texture_creator());
76 let screen = canvas.output_size().unwrap();
82 state: self.state.unwrap_or_else(|| Box::new(ActiveState::new(screen))),
86 fn print_video_display_modes(&self, video: &VideoSubsystem) {
87 println!("video subsystem: {:?}", video);
88 println!("current_video_driver: {:?}", video.current_video_driver());
89 for display in 0..video.num_video_displays().unwrap() {
91 "=== display {} - {} ===",
93 video.display_name(display).unwrap()
96 " display_bounds: {:?}",
97 video.display_bounds(display).unwrap()
100 " num_display_modes: {:?}",
101 video.num_display_modes(display).unwrap()
104 " desktop_display_mode: {:?}",
105 video.desktop_display_mode(display).unwrap()
107 let current = video.current_display_mode(display).unwrap();
109 " current_display_mode: {:?}",
112 for idx in 0..video.num_display_modes(display).unwrap() {
113 let mode = video.display_mode(display, idx).unwrap();
116 if mode == current { "*" } else { " " },
122 println!("swap interval: {:?}", video.gl_get_swap_interval());
127 pub canvas: Canvas<Window>,
128 pub event_pump: EventPump,
129 pub sprites: SpriteManager,
130 pub state: Box<dyn AppState>,
134 #[allow(clippy::new_ret_no_self)]
135 pub fn new() -> AppBuilder {
139 pub fn load_sprites(&mut self, sprites: &[(&str, &str)]) {
140 for (name, file) in sprites {
141 self.sprites.load(name, file);
145 pub fn start(&mut self) {
146 let mut frame_count: u64 = 0;
147 let mut fps_time = PreciseTime::now();
148 let mut last_time = PreciseTime::now();
151 if let Err(_) = self.handle_events() {
156 last_time.to(PreciseTime::now()).num_nanoseconds().unwrap() as Nanoseconds;
157 last_time = PreciseTime::now();
158 self.state.update(duration);
163 if frame_count == FPS as u64 {
164 let duration = fps_time.to(PreciseTime::now()).num_nanoseconds().unwrap() as f64
166 println!("fps: {}", frame_count as f64 / duration);
168 fps_time = PreciseTime::now();
175 fn handle_events(&mut self) -> Result<(), ()> {
176 for event in self.event_pump.poll_iter() {
180 keycode: Some(Keycode::Escape),
186 keycode: Some(Keycode::F11),
189 match self.canvas.window().fullscreen_state() {
190 FullscreenType::Off => self
193 .set_fullscreen(FullscreenType::Desktop),
194 _ => self.canvas.window_mut().set_fullscreen(FullscreenType::Off),
199 win_event: WindowEvent::Resized(x, y),
202 println!("window resized({}, {})", x, y)
205 win_event: WindowEvent::Maximized,
208 println!("window maximized")
211 win_event: WindowEvent::Restored,
214 println!("window restored")
217 win_event: WindowEvent::Enter,
220 println!("window enter")
223 win_event: WindowEvent::Leave,
226 println!("window leave")
229 win_event: WindowEvent::FocusGained,
232 println!("window focus gained")
235 win_event: WindowEvent::FocusLost,
238 println!("window focus lost")
240 _ => self.state.on_event(event),
246 fn render(&mut self) {
247 self.canvas.set_draw_color(Color::RGB(0, 0, 0));
249 self.state.render(&mut self.canvas, &mut self.sprites);
250 self.canvas.present();
255 fn update(&mut self, dt: Nanoseconds);
256 fn render(&mut self, canvas: &mut Canvas<Window>, sprites: &mut SpriteManager);
258 fn on_event(&mut self, event: Event);
261 type Bollar = Vec<Box<dyn Boll>>;
264 pub struct ActiveState {
272 pub fn new(screen: (u32, u32)) -> ActiveState {
274 bolls: Bollar::new(),
276 screen: Rect::from(screen),
281 fn change_boll_count(&mut self, delta: i32) {
282 #[allow(clippy::comparison_chain)]
287 } else if delta < 0 {
288 for _i in 0..(-delta) {
294 fn add_boll(&mut self) {
295 let mut rng = rand::thread_rng();
296 self.bolls.push(Box::new(SquareBoll {
298 rng.gen_range(0, self.screen.width) as f64,
299 rng.gen_range(0, self.screen.height) as f64
301 vel: point!(rng.gen_range(-2.0, 2.0), rng.gen_range(-2.0, 2.0)),
306 impl AppState for ActiveState {
307 fn update(&mut self, dt: Nanoseconds) {
308 for b in &mut self.bolls {
313 ns if ns < (NS_PER_FRAME - 90_0000) as u64 => self.change_boll_count(100),
314 ns if ns > (NS_PER_FRAME + 90_0000) as u64 => self.change_boll_count(-100),
319 fn render(&mut self, canvas: &mut Canvas<Window>, sprites: &mut SpriteManager) {
320 /* draw square of blocks */ {
324 (self.screen.width as i32 - (blocks + 1) * size) / 2,
325 (self.screen.height as i32 - (blocks + 1) * size) / 2
327 let block = sprites.get("block");
333 SDLRect::new((i) * size + offset.x, offset.y, size as u32, size as u32),
341 (blocks - i) * size + offset.x,
342 (blocks) * size + offset.y,
354 (blocks - i) * size + offset.y,
365 (blocks) * size + offset.x,
366 (i) * size + offset.y,
378 (self.screen.width as i32 - size) / 2,
379 (self.screen.height as i32 - size) / 2
381 let radius = 110.0 + size as f32 * 0.5;
382 let angle = (self.mario_angle as f32 - 90.0) * PI / 180.0;
383 let offset2 = point!((angle.cos() * radius) as i32, (angle.sin() * radius) as i32);
386 sprites.get("mario"),
389 offset.x + offset2.x,
390 offset.y + offset2.y,
395 sdl2::rect::Point::new(size / 2, size / 2),
400 self.mario_angle = (self.mario_angle + 1.0) % 360.0;
403 /* draw circles and ellipses*/ {
404 let p = point!((self.screen.width / 2) as i16, (self.screen.height / 2) as i16);
406 .circle(p.x, p.y, 100, Color::RGB(255, 255, 255))
409 .aa_circle(p.x, p.y, 110, Color::RGB(255, 255, 255))
412 .ellipse(p.x, p.y, 50, 100, Color::RGB(255, 255, 255))
415 .aa_ellipse(p.x, p.y, 110, 55, Color::RGB(255, 255, 255))
419 for b in &self.bolls {
420 b.draw(canvas, self.boll_size);
425 println!("number of bolls: {}", self.bolls.len());
428 fn on_event(&mut self, event: Event) {
431 keycode: Some(Keycode::KpPlus),
433 } => self.boll_size = std::cmp::min(self.boll_size + 1, 32),
435 keycode: Some(Keycode::KpMinus),
437 } => self.boll_size = std::cmp::max(self.boll_size - 1, 1),
438 Event::MouseMotion { x, y, .. } => self.bolls.push(Box::new(CircleBoll::new(
439 point!(x as f64, y as f64),