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https://github.com/slint-ui/slint.git
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b3f346049f
`SLINT_BACKEND="winit"` wouldn't work. So make `winit` and `femtovg` be possible value for the backend string
97 lines
3.6 KiB
Rust
97 lines
3.6 KiB
Rust
// Copyright © SixtyFPS GmbH <info@slint-ui.com>
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// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-commercial
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#![doc = include_str!("README.md")]
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#![doc(html_logo_url = "https://slint-ui.com/logo/slint-logo-square-light.svg")]
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#![cfg_attr(not(any(feature = "i-slint-backend-qt", feature = "i-slint-backend-winit")), no_std)]
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extern crate alloc;
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use alloc::boxed::Box;
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use i_slint_core::platform::Platform;
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cfg_if::cfg_if! {
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if #[cfg(all(feature = "i-slint-backend-qt", not(no_qt)))] {
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use i_slint_backend_qt as default_backend;
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fn create_default_backend() -> Box<dyn Platform + 'static> {
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Box::new(default_backend::Backend)
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}
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} else if #[cfg(feature = "i-slint-backend-winit")] {
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use i_slint_backend_winit as default_backend;
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fn create_default_backend() -> Box<dyn Platform + 'static> {
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Box::new(i_slint_backend_winit::Backend::new(None))
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}
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} else {
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}
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}
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cfg_if::cfg_if! {
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if #[cfg(any(
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all(feature = "i-slint-backend-qt", not(no_qt)),
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feature = "i-slint-backend-winit"
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))] {
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pub fn create_backend() -> Box<dyn Platform + 'static> {
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let backend_config = std::env::var("SLINT_BACKEND").or_else(|_| {
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let legacy_fallback = std::env::var("SIXTYFPS_BACKEND");
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if legacy_fallback.is_ok() {
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eprintln!("Using `SIXTYFPS_BACKEND` environment variable for dynamic backend selection. This is deprecated, use `SLINT_BACKEND` instead.")
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}
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legacy_fallback
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}).unwrap_or_default();
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let backend_config = backend_config.to_lowercase();
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let (event_loop, _renderer) = backend_config.split_once('-').unwrap_or_else(|| match backend_config.as_str() {
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"qt" => ("qt", ""),
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"gl" | "winit" => ("winit", ""),
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"femtovg" => ("winit", "femtovg"),
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"skia" => ("winit", "skia"),
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"sw" | "software" => ("winit", "software"),
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x => (x, ""),
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});
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match event_loop {
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#[cfg(all(feature = "i-slint-backend-qt", not(no_qt)))]
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"qt" => return Box::new(i_slint_backend_qt::Backend),
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#[cfg(feature = "i-slint-backend-winit")]
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"winit" => return Box::new(i_slint_backend_winit::Backend::new((!_renderer.is_empty()).then(|| _renderer))),
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_ => {},
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}
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if !backend_config.is_empty() {
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eprintln!("Could not load rendering backend {}, fallback to default", backend_config)
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}
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create_default_backend()
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}
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pub use default_backend::{
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native_widgets, Backend, NativeGlobals, NativeWidgets, HAS_NATIVE_STYLE,
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};
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} else {
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pub fn create_backend() -> Box<dyn Platform + 'static> {
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panic!("no default backend configured, the backend must be initialized manually")
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}
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pub mod native_widgets {}
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pub type NativeWidgets = ();
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pub type NativeGlobals = ();
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pub const HAS_NATIVE_STYLE: bool = false;
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}
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}
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/// Run the callback with the platform abstraction.
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/// Create the backend if it does not exist yet
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pub fn with_platform<R>(f: impl FnOnce(&dyn Platform) -> R) -> R {
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i_slint_core::with_platform(create_backend, f)
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}
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#[doc(hidden)]
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#[cold]
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#[cfg(not(target_arch = "wasm32"))]
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pub fn use_modules() {
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i_slint_core::use_modules();
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#[cfg(feature = "i-slint-backend-qt")]
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i_slint_backend_qt::use_modules();
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#[cfg(feature = "i-slint-backend-winit")]
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i_slint_backend_winit::use_modules();
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}
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