84b09b9398
# Objective The `Anchor` component doesn't need to be a enum. The variants are just mapped to `Vec2`s so it could be changed to a newtype with associated const values, saving the space needed for the discriminator by the enum. Also there was no benefit I think in hiding the underlying `Vec2` representation of `Anchor`s. Suggested by @atlv24. Fixes #18459 Fixes #18460 ## Solution Change `Anchor` to a struct newtyping a `Vec2`, and its variants into associated constants. ## Migration Guide The anchor component has been changed from an enum to a struct newtyping a `Vec2`. The `Custom` variant has been removed, instead to construct a custom `Anchor` use its tuple constructor: ```rust Sprite { anchor: Anchor(Vec2::new(0.25, 0.4)), ..default() } ``` The other enum variants have been replaced with corresponding constants: * `Anchor::BottomLeft` to `Anchor::BOTTOM_LEFT` * `Anchor::Center` to `Anchor::CENTER` * `Anchor::TopRight` to `Anchor::TOP_RIGHT` * .. and so on for the remaining variants
116 lines
3.3 KiB
Rust
116 lines
3.3 KiB
Rust
//! Simple text rendering benchmark.
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//!
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//! Creates a text block with a single span containing `100_000` glyphs,
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//! and renders it with the UI in a white color and with Text2d in a red color.
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//!
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//! To recompute all text each frame run
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//! `cargo run --example many_glyphs --release recompute-text`
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use argh::FromArgs;
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use bevy::{
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color::palettes::basic::RED,
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diagnostic::{FrameTimeDiagnosticsPlugin, LogDiagnosticsPlugin},
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prelude::*,
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text::{LineBreak, TextBounds},
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window::{PresentMode, WindowResolution},
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winit::{UpdateMode, WinitSettings},
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};
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#[derive(FromArgs, Resource)]
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/// `many_glyphs` stress test
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struct Args {
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/// don't draw the UI text.
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#[argh(switch)]
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no_ui: bool,
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/// don't draw the Text2d text.
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#[argh(switch)]
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no_text2d: bool,
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/// whether to force the text to recompute every frame by triggering change detection.
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#[argh(switch)]
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recompute_text: bool,
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}
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fn main() {
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// `from_env` panics on the web
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#[cfg(not(target_arch = "wasm32"))]
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let args: Args = argh::from_env();
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#[cfg(target_arch = "wasm32")]
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let args = Args::from_args(&[], &[]).unwrap();
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let mut app = App::new();
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app.add_plugins((
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DefaultPlugins.set(WindowPlugin {
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primary_window: Some(Window {
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present_mode: PresentMode::AutoNoVsync,
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resolution: WindowResolution::new(1920.0, 1080.0).with_scale_factor_override(1.0),
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..default()
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}),
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..default()
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}),
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FrameTimeDiagnosticsPlugin::default(),
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LogDiagnosticsPlugin::default(),
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))
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.insert_resource(WinitSettings {
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focused_mode: UpdateMode::Continuous,
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unfocused_mode: UpdateMode::Continuous,
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})
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.add_systems(Startup, setup);
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if args.recompute_text {
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app.add_systems(Update, force_text_recomputation);
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}
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app.insert_resource(args).run();
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}
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fn setup(mut commands: Commands, args: Res<Args>) {
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warn!(include_str!("warning_string.txt"));
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commands.spawn(Camera2d);
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let text_string = "0123456789".repeat(10_000);
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let text_font = TextFont {
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font_size: 4.,
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..Default::default()
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};
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let text_block = TextLayout {
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justify: JustifyText::Left,
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linebreak: LineBreak::AnyCharacter,
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};
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if !args.no_ui {
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commands
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.spawn(Node {
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width: Val::Percent(100.),
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align_items: AlignItems::Center,
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justify_content: JustifyContent::Center,
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..default()
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})
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.with_children(|commands| {
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commands
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.spawn(Node {
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width: Val::Px(1000.),
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..Default::default()
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})
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.with_child((Text(text_string.clone()), text_font.clone(), text_block));
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});
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}
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if !args.no_text2d {
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commands.spawn((
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Text2d::new(text_string),
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text_font.clone(),
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TextColor(RED.into()),
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bevy::sprite::Anchor::CENTER,
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TextBounds::new_horizontal(1000.),
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text_block,
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));
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}
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}
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fn force_text_recomputation(mut text_query: Query<&mut TextLayout>) {
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for mut block in &mut text_query {
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block.set_changed();
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}
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}
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