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92 lines
3.4 KiB
Rust
92 lines
3.4 KiB
Rust
/* LICENSE BEGIN
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This file is part of the SixtyFPS Project -- https://sixtyfps.io
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Copyright (c) 2020 Olivier Goffart <olivier.goffart@sixtyfps.io>
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Copyright (c) 2020 Simon Hausmann <simon.hausmann@sixtyfps.io>
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SPDX-License-Identifier: GPL-3.0-only
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This file is also available under commercial licensing terms.
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Please contact info@sixtyfps.io for more information.
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LICENSE END */
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/*!
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The purpose of this crate is to select the default backend for [SixtyFPS](https://sixtyfps.io)
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The backend can either be a runtime or a build time decision. The runtime decision is decided
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by the `SIXTYFPS_BACKEND` environment variable. The built time default depends on the platform.
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In order for the crate to be available at runtime, they need to be added as feature
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*/
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cfg_if::cfg_if! {
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if #[cfg(any(target_os="windows", target_os="macos", target_os = "linux", target_os = "dragonfly", target_os = "freebsd", target_os = "openbsd", target_os = "netbsd"))] {
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use sixtyfps_rendering_backend_qt as default_backend;
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} else {
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use sixtyfps_rendering_backend_gl as default_backend;
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}
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}
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pub fn backend() -> &'static dyn sixtyfps_corelib::backend::Backend {
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static INSTANCE: once_cell::sync::OnceCell<
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Box<dyn sixtyfps_corelib::backend::Backend + 'static>,
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> = once_cell::sync::OnceCell::new();
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let instance = INSTANCE.get_or_init(|| {
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#[cfg(any(
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feature = "sixtyfps-rendering-backend-qt",
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feature = "sixtyfps-rendering-backend-gl"
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))]
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let backend_config = std::env::var("SIXTYFPS_BACKEND").unwrap_or_default();
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#[cfg(feature = "sixtyfps-rendering-backend-qt")]
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if backend_config == "Qt" {
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return Box::new(sixtyfps_rendering_backend_qt::Backend);
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}
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#[cfg(feature = "sixtyfps-rendering-backend-gl")]
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if backend_config == "GL" {
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return Box::new(sixtyfps_rendering_backend_gl::Backend);
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}
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#[cfg(any(
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feature = "sixtyfps-rendering-backend-qt",
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feature = "sixtyfps-rendering-backend-gl"
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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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#[cfg(feature = "sixtyfps-rendering-backend-gl")]
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if !default_backend::IS_AVAILABLE {
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// If Qt is not available always fallback to Gl
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return Box::new(sixtyfps_rendering_backend_gl::Backend);
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}
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return Box::new(default_backend::Backend);
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});
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use std::ops::Deref;
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instance.deref()
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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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#[doc(hidden)]
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#[cold]
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pub fn use_modules() {
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default_backend::use_modules();
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#[cfg(feature = "sixtyfps-rendering-backend-qt")]
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sixtyfps_rendering_backend_qt::use_modules();
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#[cfg(feature = "sixtyfps-rendering-backend-gl")]
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sixtyfps_rendering_backend_gl::use_modules();
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}
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pub mod ffi {
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use sixtyfps_corelib::window::ffi::ComponentWindowOpaque;
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use sixtyfps_corelib::window::ComponentWindow;
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#[no_mangle]
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pub unsafe extern "C" fn sixtyfps_component_window_init(out: *mut ComponentWindowOpaque) {
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assert_eq!(
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core::mem::size_of::<ComponentWindow>(),
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core::mem::size_of::<ComponentWindowOpaque>()
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);
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core::ptr::write(out as *mut ComponentWindow, crate::backend().create_window());
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}
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}
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