129 lines
4.2 KiB
Rust
129 lines
4.2 KiB
Rust
#![deny(warnings)]
|
|
|
|
extern crate serde_json;
|
|
extern crate wasm_bindgen;
|
|
|
|
extern crate emigui;
|
|
extern crate emigui_wasm;
|
|
|
|
use {
|
|
emigui::{
|
|
color::srgba, containers::*, example_app::ExampleWindow, label, widgets::Separator, Align,
|
|
Emigui, RawInput, TextStyle, *,
|
|
},
|
|
emigui_wasm::now_sec,
|
|
};
|
|
|
|
use wasm_bindgen::prelude::*;
|
|
#[wasm_bindgen]
|
|
|
|
pub struct State {
|
|
example_app: ExampleWindow,
|
|
emigui: Emigui,
|
|
webgl_painter: emigui_wasm::webgl::Painter,
|
|
|
|
frame_times: emigui::MovementTracker<f32>,
|
|
}
|
|
|
|
impl State {
|
|
fn new(canvas_id: &str, pixels_per_point: f32) -> Result<State, JsValue> {
|
|
let emigui = Emigui::new(pixels_per_point);
|
|
emigui_wasm::load_memory(emigui.ctx());
|
|
Ok(State {
|
|
example_app: Default::default(),
|
|
emigui,
|
|
webgl_painter: emigui_wasm::webgl::Painter::new(canvas_id)?,
|
|
frame_times: emigui::MovementTracker::new(1000, 1.0),
|
|
})
|
|
}
|
|
|
|
fn run(&mut self, raw_input: RawInput) -> Result<Output, JsValue> {
|
|
let everything_start = now_sec();
|
|
|
|
let pixels_per_point = raw_input.pixels_per_point;
|
|
self.emigui.begin_frame(raw_input);
|
|
|
|
let mut region = self.emigui.background_region();
|
|
let mut region = region.centered_column(region.available_width().min(480.0));
|
|
region.set_align(Align::Min);
|
|
region.add(label!("Emigui!").text_style(TextStyle::Heading));
|
|
region.add_label("Emigui is an immediate mode GUI written in Rust, compiled to WebAssembly, rendered with WebGL.");
|
|
region.add_label(
|
|
"Everything you see is rendered as textured triangles. There is no DOM. There are no HTML elements."
|
|
);
|
|
region.add_label("This is not JavaScript. This is Rust, running at 60 FPS. This is the web page, reinvented with game tech.");
|
|
region.add_label("This is also work in progress, and not ready for production... yet :)");
|
|
region.horizontal(|region| {
|
|
region.add_label("Project home page:");
|
|
region.add_hyperlink("https://github.com/emilk/emigui/");
|
|
});
|
|
region.add(Separator::new());
|
|
|
|
region.set_align(Align::Min);
|
|
region.add_label("WebGl painter info:");
|
|
region.indent("webgl region", |region| {
|
|
region.add_label(self.webgl_painter.debug_info());
|
|
});
|
|
|
|
region.add(
|
|
label!(
|
|
"CPU usage: {:.2} ms (excludes painting)",
|
|
1e3 * self.frame_times.average().unwrap_or_default()
|
|
)
|
|
.text_style(TextStyle::Monospace),
|
|
);
|
|
region.add(
|
|
label!(
|
|
"FPS: {:.1}",
|
|
1.0 / self.frame_times.mean_time_interval().unwrap_or_default()
|
|
)
|
|
.text_style(TextStyle::Monospace),
|
|
);
|
|
|
|
// TODO: Make it even simpler to show a window
|
|
|
|
Window::new("Examples")
|
|
.default_pos(pos2(32.0, 300.0))
|
|
.default_size(vec2(300.0, 400.0))
|
|
.show(region.ctx(), |region| {
|
|
self.example_app.ui(region);
|
|
});
|
|
|
|
Window::new("Emigui settings")
|
|
.default_pos(pos2(400.0, 300.0))
|
|
.default_size(vec2(400.0, 400.0))
|
|
.show(region.ctx(), |region| {
|
|
self.emigui.ui(region);
|
|
});
|
|
|
|
let bg_color = srgba(0, 0, 0, 0); // Use background css color.
|
|
let (output, batches) = self.emigui.end_frame();
|
|
|
|
let now = now_sec();
|
|
self.frame_times.add(now, (now - everything_start) as f32);
|
|
|
|
self.webgl_painter.paint_batches(
|
|
bg_color,
|
|
batches,
|
|
self.emigui.texture(),
|
|
pixels_per_point,
|
|
)?;
|
|
|
|
emigui_wasm::save_memory(self.emigui.ctx()); // TODO: don't save every frame
|
|
|
|
Ok(output)
|
|
}
|
|
}
|
|
|
|
#[wasm_bindgen]
|
|
pub fn new_webgl_gui(canvas_id: &str, pixels_per_point: f32) -> Result<State, JsValue> {
|
|
State::new(canvas_id, pixels_per_point)
|
|
}
|
|
|
|
#[wasm_bindgen]
|
|
pub fn run_gui(state: &mut State, raw_input_json: &str) -> Result<String, JsValue> {
|
|
// TODO: nicer interface than JSON
|
|
let raw_input: RawInput = serde_json::from_str(raw_input_json).unwrap();
|
|
let output = state.run(raw_input)?;
|
|
Ok(serde_json::to_string(&output).unwrap())
|
|
}
|