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dae978a0f9
When not explicitly selected, we would construct the Backend struct as-is, without calling `new()`. Therefore we would miss the call to ensure_initialized() and later set the Qt::AA_PluginApplication application attribute, which screws up rendering.
99 lines
3.8 KiB
Rust
99 lines
3.8 KiB
Rust
// Copyright © SixtyFPS GmbH <info@slint.dev>
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// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-1.1 OR LicenseRef-Slint-commercial
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#![doc = include_str!("README.md")]
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#![doc(html_logo_url = "https://slint.dev/logo/slint-logo-square-light.svg")]
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#![cfg_attr(
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not(any(
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feature = "i-slint-backend-qt",
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feature = "i-slint-backend-winit",
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feature = "i-slint-backend-linuxkms"
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)),
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no_std
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)]
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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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use i_slint_core::platform::PlatformError;
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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() -> Result<Box<dyn Platform + 'static>, PlatformError> {
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Ok(Box::new(default_backend::Backend::new()))
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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() -> Result<Box<dyn Platform + 'static>, PlatformError> {
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Ok(Box::new(i_slint_backend_winit::Backend::new()))
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}
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} else if #[cfg(feature = "i-slint-backend-linuxkms")] {
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use i_slint_backend_linuxkms as default_backend;
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fn create_default_backend() -> Result<Box<dyn Platform + 'static>, PlatformError> {
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Ok(Box::new(i_slint_backend_linuxkms::Backend::new()?))
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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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feature = "i-slint-backend-linuxkms"
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))] {
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pub fn create_backend() -> Result<Box<dyn Platform + 'static>, PlatformError> {
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let backend_config = std::env::var("SLINT_BACKEND").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(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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"linuxkms" => ("linuxkms", ""),
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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 Ok(Box::new(i_slint_backend_qt::Backend::new())),
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#[cfg(feature = "i-slint-backend-winit")]
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"winit" => return Ok(Box::new(i_slint_backend_winit::Backend::new_with_renderer_by_name((!_renderer.is_empty()).then_some(_renderer)))),
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#[cfg(feature = "i-slint-backend-linuxkms")]
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"linuxkms" => return Ok(Box::new(i_slint_backend_linuxkms::Backend::new_with_renderer_by_name((!_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() -> Result<Box<dyn Platform + 'static>, PlatformError> {
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Err(PlatformError::NoPlatform)
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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>(
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f: impl FnOnce(&dyn Platform) -> Result<R, PlatformError>,
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) -> Result<R, PlatformError> {
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i_slint_core::with_platform(create_backend, f)
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}
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