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[Merged by Bors] - Fix scale_factor_override in the winit backend #2784

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[Merged by Bors] - Fix scale_factor_override in the winit backend #2784

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2388230
Fix scale_factor_override in the winit backend
DJMcNab Sep 7, 2021
bd9a035
Fix clippy failure
DJMcNab Sep 7, 2021
c2e4ddc
Fixup docs for WindowResized
DJMcNab Sep 8, 2021
013713f
Correctly handle scale factors on resizing
DJMcNab Sep 8, 2021
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4 changes: 3 additions & 1 deletion crates/bevy_window/src/event.rs
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Expand Up @@ -3,11 +3,13 @@ use std::path::PathBuf;
use super::{WindowDescriptor, WindowId};
use bevy_math::{IVec2, Vec2};

/// A window event that is sent whenever a window has been resized.
/// A window event that is sent whenever a windows logical size has changed
#[derive(Debug, Clone)]
pub struct WindowResized {
pub id: WindowId,
/// The new logical width of the window
pub width: f32,
/// The new logical height of the window
pub height: f32,
}

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1 change: 1 addition & 0 deletions crates/bevy_winit/Cargo.toml
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Expand Up @@ -23,6 +23,7 @@ bevy_utils = { path = "../bevy_utils", version = "0.5.0" }

# other
winit = { version = "0.25.0", default-features = false }
approx = { version = "0.5.0", default-features = false }
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Do we need a new crate? Wouldn't silencing clippy, or using epsilon work?

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Maybe? We already depend on this transitively in the bevy_text crate, and I don't think it's that big. I can make the function inline though.

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ah, if the dep already exists it's probably fine

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This feels small enough that it might be better to include it in bevy_core. We already have FloatOrd, which is in a similar vein. For now this is fine though.


[target.'cfg(target_arch = "wasm32")'.dependencies]
winit = { version = "0.25.0", features = ["web-sys"], default-features = false }
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28 changes: 20 additions & 8 deletions crates/bevy_winit/src/lib.rs
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Expand Up @@ -395,8 +395,20 @@ pub fn winit_runner_with(mut app: App, mut event_loop: EventLoop<()>) {
id: window_id,
scale_factor,
});
#[allow(clippy::float_cmp)]
if window.scale_factor() != scale_factor {
let prior_factor = window.scale_factor();
window.update_scale_factor_from_backend(scale_factor);
let new_factor = window.scale_factor();
if let Some(forced_factor) = window.scale_factor_override() {
// If there is a scale factor override, then force that to be used
// Otherwise, use the OS suggested size
// We have already told the OS about our resize constraints, so
// the new_inner_size should take those into account
*new_inner_size = winit::dpi::LogicalSize::new(
window.requested_width(),
window.requested_height(),
)
.to_physical::<u32>(forced_factor);
} else if approx::relative_ne!(new_factor, prior_factor) {
let mut scale_factor_change_events = world
.get_resource_mut::<Events<WindowScaleFactorChanged>>()
.unwrap();
Expand All @@ -407,17 +419,17 @@ pub fn winit_runner_with(mut app: App, mut event_loop: EventLoop<()>) {
});
}

window.update_scale_factor_from_backend(scale_factor);

if window.physical_width() != new_inner_size.width
|| window.physical_height() != new_inner_size.height
let new_logical_width = new_inner_size.width as f64 / new_factor;
let new_logical_height = new_inner_size.height as f64 / new_factor;
if approx::relative_ne!(window.width() as f64, new_logical_width)
|| approx::relative_ne!(window.height() as f64, new_logical_height)
{
let mut resize_events =
world.get_resource_mut::<Events<WindowResized>>().unwrap();
resize_events.send(WindowResized {
id: window_id,
width: window.width(),
height: window.height(),
width: new_logical_width as f32,
height: new_logical_height as f32,
});
}
window.update_actual_size_from_backend(
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