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On Wayland, add support for fractional scaling

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This adds support for the fractional scaling on Wayland via the
wp-fractional-scale protocol.

Co-authored-by: Julian Orth <ju.orth@gmail.com>
This commit is contained in:
Kirill Chibisov 2023-01-20 00:02:16 +03:00 • committed by GitHub
parent 1886949efe
commit de782504ab
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GPG key ID: 4AEE18F83AFDEB23
14 changed files with 361 additions and 66 deletions
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19
src/platform_impl/linux/wayland/event_loop/mod.rs
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@ -374,10 +374,11 @@ impl<T: 'static> EventLoop<T> {
});
for (window_id, window_compositor_update) in window_compositor_updates.iter_mut() {
if let Some(scale_factor) = window_compositor_update.scale_factor.map(|f| f as f64)
{
if let Some(scale_factor) = window_compositor_update.scale_factor {
let mut physical_size = self.with_state(|state| {
let window_handle = state.window_map.get(window_id).unwrap();
*window_handle.scale_factor.lock().unwrap() = scale_factor;
let mut size = window_handle.size.lock().unwrap();
// Update the new logical size if it was changed.
@ -409,6 +410,15 @@ impl<T: 'static> EventLoop<T> {
if let Some(size) = window_compositor_update.size.take() {
let physical_size = self.with_state(|state| {
let window_handle = state.window_map.get_mut(window_id).unwrap();
if let Some(fs_state) = window_handle.fractional_scaling_state.as_ref() {
// If we have a viewport then we support fractional scaling. As per the
// protocol, we have to set the viewport size of the size prior scaling.
fs_state
.viewport
.set_destination(size.width as _, size.height as _);
}
let mut window_size = window_handle.size.lock().unwrap();
// Always issue resize event on scale factor change.
@ -419,9 +429,8 @@ impl<T: 'static> EventLoop<T> {
None
} else {
*window_size = size;
let scale_factor =
sctk::get_surface_scale_factor(window_handle.window.surface());
let physical_size = size.to_physical(scale_factor as f64);
let scale_factor = window_handle.scale_factor();
let physical_size = size.to_physical(scale_factor);
Some(physical_size)
};