use glyphon::{Attrs, Buffer, Color, Family, Metrics, Shaping, TextArea, TextBounds}; use std::time::Instant; use crate::{datastructs::RenderState, RenderInput}; pub(super) struct FpsIndicator { buffer: Buffer, last_update: Instant, update_counter: u32, } impl FpsIndicator { pub fn new(state: &mut RenderState) -> Self { let mut buffer = Buffer::new(&mut state.text_font_system, Metrics::new(12.0, 20.0)); buffer.set_size( &mut state.text_font_system, state.window_size.width as f32, state.window_size.height as f32, ); buffer.shape_until_scroll(&mut state.text_font_system); Self { buffer, last_update: Instant::now(), update_counter: 0, } } } impl FpsIndicator { pub fn update(&mut self, input: &RenderInput, state: &mut RenderState) { // Update once every n frames if self.update_counter > 0 { self.update_counter -= 1; return; } self.update_counter = 100; self.buffer.set_text( &mut state.text_font_system, &format!( "Game: {:.02?}\nPhys: {:.02?}\nRender: {:.02?}", 1.0 / input.timing.galaxy, 1.0 / input.timing.physics, 1.0 / (self.last_update.elapsed().as_secs_f32() / 100.0) ), Attrs::new().family(Family::SansSerif), Shaping::Basic, ); self.last_update = Instant::now(); } pub fn get_textarea(&self) -> TextArea { TextArea { buffer: &self.buffer, left: 10.0, top: 400.0, scale: 1.0, bounds: TextBounds { left: 10, top: 400, right: 300, bottom: 800, }, default_color: Color::rgb(255, 255, 255), } } }