mirror of
https://github.com/slint-ui/slint.git
synced 2025-09-30 22:01:13 +00:00
47 lines
1.7 KiB
Rust
47 lines
1.7 KiB
Rust
/* LICENSE BEGIN
|
|
This file is part of the SixtyFPS Project -- https://sixtyfps.io
|
|
Copyright (c) 2020 Olivier Goffart <olivier.goffart@sixtyfps.io>
|
|
Copyright (c) 2020 Simon Hausmann <simon.hausmann@sixtyfps.io>
|
|
|
|
SPDX-License-Identifier: GPL-3.0-only
|
|
This file is also available under commercial licensing terms.
|
|
Please contact info@sixtyfps.io for more information.
|
|
LICENSE END */
|
|
/*!
|
|
The backend is the abstraction for crates that need to do the actual drawing and event loop
|
|
*/
|
|
|
|
use crate::window::ComponentWindow;
|
|
|
|
/// Interface implemented by backends
|
|
pub trait Backend: Send + Sync {
|
|
/// Instentiate a window for a component.
|
|
/// FIXME: should return a Box<dyn PlatformWindow>
|
|
fn create_window(&'static self) -> ComponentWindow;
|
|
|
|
/// Spins an event loop and renders the items of the provided component in this window.
|
|
fn run_event_loop(&'static self);
|
|
|
|
/// This function can be used to register a custom TrueType font with SixtyFPS,
|
|
/// for use with the `font-family` property. The provided slice must be a valid TrueType
|
|
/// font.
|
|
fn register_application_font_from_memory(
|
|
&'static self,
|
|
data: &'static [u8],
|
|
) -> Result<(), Box<dyn std::error::Error>>;
|
|
}
|
|
|
|
static PRIVATE_BACKEND_INSTANCE: once_cell::sync::OnceCell<Box<dyn Backend + 'static>> =
|
|
once_cell::sync::OnceCell::new();
|
|
|
|
pub fn instance() -> Option<&'static dyn Backend> {
|
|
use std::ops::Deref;
|
|
PRIVATE_BACKEND_INSTANCE.get().map(|backend_box| backend_box.deref())
|
|
}
|
|
|
|
pub fn instance_or_init(
|
|
factory_fn: impl FnOnce() -> Box<dyn Backend + 'static>,
|
|
) -> &'static dyn Backend {
|
|
use std::ops::Deref;
|
|
PRIVATE_BACKEND_INSTANCE.get_or_init(factory_fn).deref()
|
|
}
|