Struct BackdropTable

pub struct BackdropTable {
    pub bind_groups: HashMap<u16, BindGroup>,
    /* private fields */
}

Blurred backdrop textures keyed by isolated pass id (keeps pool leases alive).

Bind groups and leases are retained together until compositing finishes, so pooled textures cannot be reused while sampled by the frame.

Examples

use ailloli_ui_render_wgpu::BackdropTable;
let table = BackdropTable::empty();
assert!(table.bind_groups.is_empty());

Fields

bind_groups: HashMap<u16, BindGroup>

Sample bindings indexed by the frame-local u16 pass identifier.

Implementations

impl BackdropTable

pub fn empty() -> Self

Creates a table with no bindings or live pool leases.

Examples

use ailloli_ui_render_wgpu::BackdropTable;
assert!(BackdropTable::empty().get(0).is_none());

pub fn get(&self, pass_id: u16) -> Option<&BindGroup>

Returns the backdrop sample binding for pass_id.

Examples

use ailloli_ui_render_wgpu::BackdropTable;
assert!(BackdropTable::empty().get(7).is_none());

pub fn insert( &mut self, pass_id: u16, lease: LeasedOffscreen, bind_group: BindGroup, )

Inserts or replaces a binding and retains the associated pool lease.

Replacing a binding does not remove the earlier lease; both remain live until the table is dropped, preventing premature pool reuse.

Examples

use ailloli_ui_render_wgpu::{BackdropTable, offscreen_pool::LeasedOffscreen};
fn retain(table: &mut BackdropTable, lease: LeasedOffscreen, binding: wgpu::BindGroup) {
    table.insert(1, lease, binding);
}

Trait Implementations

impl Default for BackdropTable

fn default() -> BackdropTable

Returns the “default value” for a type.