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4
.cargo/config
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@ -1,4 +0,0 @@
[build]
rustflags = [
"--cfg=web_sys_unstable_apis"
]

272
Cargo.lock generated
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version = "0.29.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8691f134d584a33a6606d9d717b95c4fa20065605f798a3f350d78dced02a902"
checksum = "94f6e5e340d7c13490eca867898c4cec5af56c27a5ffe5c80c6fc4708e22d33e"
dependencies = [
"nix 0.24.2",
"nix",
"once_cell",
"smallvec",
"wayland-sys",
@ -1339,20 +1313,20 @@ dependencies = [
[[package]]
name = "wayland-cursor"
version = "0.29.5"
version = "0.29.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "6865c6b66f13d6257bef1cd40cbfe8ef2f150fb8ebbdb1e8e873455931377661"
checksum = "c52758f13d5e7861fc83d942d3d99bf270c83269575e52ac29e5b73cb956a6bd"
dependencies = [
"nix 0.24.2",
"nix",
"wayland-client",
"xcursor",
]
[[package]]
name = "wayland-protocols"
version = "0.29.5"
version = "0.29.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b950621f9354b322ee817a23474e479b34be96c2e909c14f7bc0100e9a970bc6"
checksum = "60147ae23303402e41fe034f74fb2c35ad0780ee88a1c40ac09a3be1e7465741"
dependencies = [
"bitflags",
"wayland-client",
@ -1362,9 +1336,9 @@ dependencies = [
[[package]]
name = "wayland-scanner"
version = "0.29.5"
version = "0.29.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8f4303d8fa22ab852f789e75a967f0a2cdc430a607751c0499bada3e451cbd53"
checksum = "39a1ed3143f7a143187156a2ab52742e89dac33245ba505c17224df48939f9e0"
dependencies = [
"proc-macro2",
"quote",
@ -1373,9 +1347,9 @@ dependencies = [
[[package]]
name = "wayland-sys"
version = "0.29.5"
version = "0.29.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "be12ce1a3c39ec7dba25594b97b42cb3195d54953ddb9d3d95a7c3902bc6e9d4"
checksum = "d9341df79a8975679188e37dab3889bfa57c44ac2cb6da166f519a81cbe452d4"
dependencies = [
"dlib",
"lazy_static",
@ -1611,9 +1585,9 @@ dependencies = [
[[package]]
name = "x11-dl"
version = "2.20.0"
version = "2.19.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0c83627bc137605acc00bb399c7b908ef460b621fc37c953db2b09f88c449ea6"
checksum = "ea26926b4ce81a6f5d9d0f3a0bc401e5a37c6ae14a1bfaa8ff6099ca80038c59"
dependencies = [
"lazy_static",
"libc",

19
Cargo.toml
Unescape Escape View File

@ -6,29 +6,16 @@ edition = "2021"
# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
[dependencies]
instant = "0.1.12"
chrono = "0.4.19"
env_logger = "0.9.0"
log = "0.4.17"
pixels = "0.9.0"
rand = "0.8.5"
rand_distr = "0.4.3"
timer = "0.2.0"
winit = "0.26.1"
[target.'cfg(target_family = "wasm")'.dependencies]
console_error_panic_hook = "0.1.7"
getrandom = { version = "0.2", features = ["js"] }
console_log = { version = "0.2.0", features = ["wasm-bindgen"] }
wasm-bindgen = "0.2.82"
wasm-bindgen-futures = "0.4.32"
web-sys = { version = "0.3.57", features = ["Element", "HtmlCollection"] }
[target.'cfg(not(target_family = "wasm"))'.dependencies]
tokio = { version = "1.21.0", features = ["rt-multi-thread", "sync", "time"] }
env_logger = "0.9.0"
winit_input_helper = "0.12.0"
[target.wasm32-unknown-unknown.dependencies]
web-sys = "*"
[dev-dependencies]
bencher = "0.1.5"

9
index.html
Unescape Escape View File

@ -1,9 +0,0 @@
<!doctype html>
<html lang=en>
<head>
<meta charset=utf-8>
<title>blah</title>
</head>
<body>
</body>
</html>

58
src/lib.rs
Unescape Escape View File

@ -1,13 +1,32 @@
use rand::Rng;
pub const WIDTH: u32 = 400;
pub const HEIGHT: u32 = 300;
pub const PURPLE_BACKGROUND: &[u8] = &[0xd3, 0xb7, 0xf7, 0xff];
pub const PURPLE_RAIN: &[u8] = &[207, 100, 219, 0xff];
pub fn draw(drops: &mut Vec<Drop>, frame: &mut [u8]) {
let pixels = frame.chunks_exact_mut(4);
for pixel in pixels {
pixel.copy_from_slice(&[0xd3, 0xb7, 0xf7, 0xff]);
}
drops.iter_mut().for_each(|d| d.update());
pub const BLUE_BACKGROUND: &[u8] = &[0x8f, 0xbe, 0xeb, 0xff];
pub const BLUE_RAIN: &[u8] = &[0x3e, 0x9f, 0xfa, 0xff];
for drop in drops {
let mut drawn = false;
for y in drop.y..(drop.y + drop.z) {
for x in drop.x..(drop.x + drop.z/4) {
if let Ok(i) = (y * (WIDTH as i32) * 4 + x * 4).try_into() {
if i < frame.len() {
drawn = true;
frame[i..i + 4].copy_from_slice(&[207, 100, 219, 0xff]);
}
}
}
}
if !drawn {
drop.y = -drop.z;
}
}
}
pub struct Drop {
pub x: i32,
@ -17,33 +36,6 @@ pub struct Drop {
impl Drop {
fn update(&mut self) {
self.y += std::cmp::max(self.z / 4, 1);
}
pub fn draw(drops: &mut [Drop], frame: &mut [u8]) {
let pixels = frame.chunks_exact_mut(4);
for pixel in pixels {
pixel.copy_from_slice(BLUE_BACKGROUND);
}
drops.iter_mut().for_each(Drop::update);
for drop in drops {
let mut drawn = false;
for y in drop.y..(drop.y + drop.z) {
for x in drop.x..(drop.x + drop.z / 4) {
if let Ok(i) = (y * (WIDTH as i32) * 4 + x * 4).try_into() {
if i < frame.len() {
drawn = true;
frame[i..i + 4].copy_from_slice(BLUE_RAIN);
}
}
}
}
if !drawn {
drop.y = -drop.z;
drop.x = rand::thread_rng().gen_range(0..WIDTH as i32);
}
}
self.y += std::cmp::max(self.z/4, 1);
}
}

169
src/main.rs
Unescape Escape View File

@ -1,68 +1,40 @@
#![windows_subsystem = "windows"]
use chrono::Duration;
use log::error;
use pixels::{Pixels, SurfaceTexture};
use rand::Rng;
#[cfg(not(target_arch = "wasm32"))]
use winit::event::VirtualKeyCode;
use timer::Timer;
use winit::{
dpi::LogicalSize,
event::{
Event,
StartCause::{self, ResumeTimeReached},
},
event::{Event, VirtualKeyCode},
event_loop::{ControlFlow, EventLoop},
window::WindowBuilder,
};
#[cfg(not(target_arch = "wasm32"))]
use winit_input_helper::WinitInputHelper;
use purple_rain::{Drop, HEIGHT, WIDTH};
use purple_rain::*;
fn main() {
#[cfg(target_arch = "wasm32")]
{
wasm_bindgen_futures::spawn_local(run());
}
#[cfg(not(target_arch = "wasm32"))]
{
tokio::runtime::Builder::new_multi_thread()
.enable_all()
.enable_time()
.build()
.unwrap()
.block_on(run());
}
}
async fn run() {
env_logger::init();
let event_loop = EventLoop::new();
#[cfg(not(target_arch = "wasm32"))]
let mut input = WinitInputHelper::new();
let window = {
let size = LogicalSize::new(f64::from(WIDTH), f64::from(HEIGHT));
let scaled_size = LogicalSize::new(f64::from(WIDTH) * 4.0, f64::from(HEIGHT) * 4.0);
let size = LogicalSize::new(WIDTH as f64, HEIGHT as f64);
let scaled_size = LogicalSize::new(WIDTH as f64 * 3.0, HEIGHT as f64 * 3.0);
WindowBuilder::new()
.with_title("Purple Rain")
.with_inner_size(scaled_size)
.with_min_inner_size(size)
.build(&event_loop)
.expect("Could not initialize the window")
.unwrap()
};
#[cfg(all(target_arch = "wasm32", not(debug_assertions)))]
wasm::create_canvas(&window);
#[cfg(all(target_arch = "wasm32", debug_assertions))]
let log_list = wasm::create_log_list(&window);
let mut pixels = {
let window_size = window.inner_size();
let surface_texture = SurfaceTexture::new(window_size.width, window_size.height, &window);
Pixels::new_async(WIDTH, HEIGHT, surface_texture).await
Pixels::new(WIDTH, HEIGHT, surface_texture)
}
.expect("Could not initialize the pixels object.");
.unwrap();
let mut drops = Vec::new();
let mut rng = rand::thread_rng();
@ -71,43 +43,33 @@ async fn run() {
drops.push(Drop {
x: (rng.gen_range(0..WIDTH as i32)),
y: (rng.gen_range(0..HEIGHT as i32)),
z: ((rng.sample(rand_distr::Geometric::new(0.2).unwrap()) + 1) as i32),
});
z: ((rng.sample(rand_distr::Geometric::new(0.2).unwrap())+1) as i32),
})
}
event_loop.run(move |event, _, control_flow| {
#[cfg(all(target_arch = "wasm32", debug_assertions))]
wasm::log_event(&log_list, &event);
let timer = Timer::new();
let guard = timer.schedule_repeating(Duration::milliseconds(10), move || {
window.request_redraw();
});
guard.ignore();
match event {
Event::RedrawRequested(_) => {
Drop::draw(&mut drops, pixels.get_frame());
if pixels
.render()
.map_err(|e| error!("pixels.render() failed: {}", e))
.is_err()
{
*control_flow = ControlFlow::Exit;
return;
}
}
Event::NewEvents(StartCause::Init) | Event::NewEvents(ResumeTimeReached { .. }) => {
*control_flow = ControlFlow::WaitUntil(
instant::Instant::now() + instant::Duration::from_millis(1000 / 60),
);
window.request_redraw();
event_loop.run(move |event, _, control_flow| {
*control_flow = ControlFlow::Wait;
if let Event::RedrawRequested(_) = event {
draw(&mut drops, pixels.get_frame());
if pixels
.render()
.map_err(|e| error!("pixels.render() failed: {}", e))
.is_err()
{
*control_flow = ControlFlow::Exit;
return;
}
#[cfg(not(target_arch = "wasm32"))]
Event::MainEventsCleared => window.request_redraw(),
_ => (),
}
#[cfg(not(target_arch = "wasm32"))]
if input.update(&event) {
if input.key_pressed(VirtualKeyCode::Escape)
|| input.key_pressed(VirtualKeyCode::Q)
|| input.quit()
{
if input.key_pressed(VirtualKeyCode::Escape) || input.key_pressed(VirtualKeyCode::Q) || input.quit() {
*control_flow = ControlFlow::Exit;
return;
} else if input.key_pressed(VirtualKeyCode::Space) {
@ -122,74 +84,3 @@ async fn run() {
});
}
#[cfg(target_arch = "wasm32")]
mod wasm {
use wasm_bindgen::prelude::*;
#[cfg(debug_assertions)]
use winit::event::Event;
use winit::window::Window;
#[wasm_bindgen(start)]
pub fn run() {
console_log::init_with_level(log::Level::Debug).expect("error initializing logger");
std::panic::set_hook(Box::new(console_error_panic_hook::hook));
#[allow(clippy::main_recursion)]
super::main();
}
pub fn create_canvas(window: &Window) {
use winit::platform::web::WindowExtWebSys;
let canvas = window.canvas();
canvas.style().set_css_text(
"background-color: crimson; margin: auto; width: 100%; aspect-ratio: 4 / 3;",
);
// Set id so that we can move it later
canvas.set_id("purple_rain");
let window = web_sys::window().unwrap();
let document = window.document().unwrap();
let body = document.body().unwrap();
let canvas_div = document
.get_element_by_id("purple_rain_canvas")
.unwrap_or(From::from(body)); //Get the div
canvas_div.append_child(&canvas).unwrap();
}
#[cfg(debug_assertions)]
pub fn create_log_list(window: &Window) -> web_sys::Element {
create_canvas(window);
let window = web_sys::window().unwrap();
let document = window.document().unwrap();
let body = document.body().unwrap();
let log_header = document.create_element("h2").unwrap();
log_header.set_text_content(Some("Event Log"));
body.append_child(&log_header).unwrap();
let log_list = document.create_element("ul").unwrap();
body.append_child(&log_list).unwrap();
log_list
}
#[cfg(debug_assertions)]
pub fn log_event(log_list: &web_sys::Element, event: &Event<()>) {
log::debug!("{:?}", event);
// Getting access to browser logs requires a lot of setup on mobile devices.
// So we implement this basic logging system into the page to give developers an easy alternative.
// As a bonus its also kind of handy on desktop.
if let Event::WindowEvent { event, .. } = &event {
let window = web_sys::window().unwrap();
let document = window.document().unwrap();
let log = document.create_element("li").unwrap();
log.set_text_content(Some(&format!("{:?}", event)));
log_list
.insert_before(&log, log_list.first_child().as_ref())
.unwrap();
}
}
}

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