slint/api/cpp/lib.rs
Olivier Goffart 7417422e3c Make the PlatformAbstraction not Send using a EventLoopProxy trait
This changes the way the platform abstraction is initialized
2022-08-24 11:32:21 +02:00

107 lines
3.1 KiB
Rust

// Copyright © SixtyFPS GmbH <info@slint-ui.com>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-commercial
/*! This crate just expose the function used by the C++ integration */
use core::ffi::c_void;
use i_slint_core::window::{ffi::PlatformWindowRcOpaque, PlatformWindow};
use std::rc::Rc;
#[doc(hidden)]
#[cold]
pub fn use_modules() -> usize {
#[cfg(feature = "slint-interpreter")]
slint_interpreter::use_modules();
i_slint_backend_selector::use_modules();
i_slint_core::use_modules()
}
#[no_mangle]
pub unsafe extern "C" fn slint_windowrc_init(out: *mut PlatformWindowRcOpaque) {
assert_eq!(
core::mem::size_of::<Rc<dyn PlatformWindow>>(),
core::mem::size_of::<PlatformWindowRcOpaque>()
);
let win = i_slint_backend_selector::with_platform_abstraction(|b| b.create_window());
core::ptr::write(out as *mut Rc<dyn PlatformWindow>, win);
}
#[no_mangle]
pub unsafe extern "C" fn slint_run_event_loop() {
i_slint_backend_selector::with_platform_abstraction(|b| {
b.run_event_loop(i_slint_core::platform::EventLoopQuitBehavior::QuitOnLastWindowClosed)
});
}
/// Will execute the given functor in the main thread
#[no_mangle]
pub unsafe extern "C" fn slint_post_event(
event: extern "C" fn(user_data: *mut c_void),
user_data: *mut c_void,
drop_user_data: Option<extern "C" fn(*mut c_void)>,
) {
struct UserData {
user_data: *mut c_void,
drop_user_data: Option<extern "C" fn(*mut c_void)>,
}
impl Drop for UserData {
fn drop(&mut self) {
if let Some(x) = self.drop_user_data {
x(self.user_data)
}
}
}
unsafe impl Send for UserData {}
let ud = UserData { user_data, drop_user_data };
i_slint_core::api::invoke_from_event_loop(move || {
let ud = &ud;
event(ud.user_data);
});
}
#[no_mangle]
pub unsafe extern "C" fn slint_quit_event_loop() {
i_slint_core::api::quit_event_loop()
}
#[no_mangle]
pub unsafe extern "C" fn slint_register_font_from_path(
win: *const PlatformWindowRcOpaque,
path: &i_slint_core::SharedString,
error_str: *mut i_slint_core::SharedString,
) {
let platform_window = &*(win as *const Rc<dyn PlatformWindow>);
core::ptr::write(
error_str,
match platform_window
.renderer()
.register_font_from_path(std::path::Path::new(path.as_str()))
{
Ok(()) => Default::default(),
Err(err) => err.to_string().into(),
},
)
}
#[no_mangle]
pub unsafe extern "C" fn slint_register_font_from_data(
win: *const PlatformWindowRcOpaque,
data: i_slint_core::slice::Slice<'static, u8>,
error_str: *mut i_slint_core::SharedString,
) {
let platform_window = &*(win as *const Rc<dyn PlatformWindow>);
core::ptr::write(
error_str,
match platform_window.renderer().register_font_from_memory(data.as_slice()) {
Ok(()) => Default::default(),
Err(err) => err.to_string().into(),
},
)
}
#[cfg(feature = "testing")]
#[no_mangle]
pub unsafe extern "C" fn slint_testing_init_backend() {
i_slint_backend_testing::init();
}