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use bevy::{
ecs::{
component::ComponentId,
world::DeferredWorld,
},
prelude::*,
render::render_resource::{
Extent3d, TextureDescriptor, TextureDimension, TextureFormat, TextureUsages,
},
};
use bevy_dither_post_process::components::DitherPostProcessSettings;
use bevy_headless_render::components::HeadlessRenderSource;
/// Marker component for terminal display
#[derive(Component, Debug)]
#[component(on_add = on_add_terminal_display)]
pub struct TerminalDisplay(pub u32);
fn on_add_terminal_display(mut world: DeferredWorld, entity: Entity, _id: ComponentId) {
let asset_server = world.get_resource::<AssetServer>().unwrap();
let dither_level = world.entity(entity).get::<TerminalDisplay>().unwrap().0;
let terminal_size = crossterm::terminal::size().unwrap();
let size = Extent3d {
width: (terminal_size.0 as u32) * 2,
height: (terminal_size.1 as u32) * 4,
depth_or_array_layers: 1,
};
let mut image = Image {
texture_descriptor: TextureDescriptor {
label: None,
size,
dimension: TextureDimension::D2,
format: TextureFormat::R8Unorm,
mip_level_count: 1,
sample_count: 1,
usage: TextureUsages::TEXTURE_BINDING
| TextureUsages::COPY_SRC
| TextureUsages::RENDER_ATTACHMENT,
view_formats: &[],
},
..default()
};
image.resize(size);
let image_handle = asset_server.add(image);
let headless_render_source = HeadlessRenderSource::new(&asset_server, image_handle.clone());
let post_process_settings = DitherPostProcessSettings::new(dither_level, &asset_server);
world
.commands()
.entity(entity)
.insert((headless_render_source, post_process_settings));
if let Some(mut camera) = world.entity_mut(entity).get_mut::<Camera>() {
camera.target = image_handle.into();
} else {
world.commands().entity(entity).insert(Camera {
target: image_handle.into(),
..Default::default()
});
}
}
|
