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image: Do not require monitor information

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Before, monitor information not being available lead to panic.

Closes #77

Part-of: <https://gitlab.gnome.org/Incubator/loupe/-/merge_requests/167>
This commit is contained in:
Sophie Herold 2023-04-10 16:47:01 +02:00 • committed by Marge Bot
parent fad8bb7939
commit 5a93ec71da
1 changed files with 50 additions and 49 deletions
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11
src/widgets/image.rs
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@ -654,11 +654,9 @@ mod imp {
if image_width > 0 && image_height > 0 { if image_width > 0 && image_height > 0 {
if let Some(display) = gdk::Display::default() { if let Some(display) = gdk::Display::default() {
if let Some(native) = self.obj().native() { if let Some(native) = self.obj().native() {
if let Some(monitor) = display.monitor_at_surface(&native.surface()) {
let hidpi_scale = self.obj().scale_factor() as f64; let hidpi_scale = self.obj().scale_factor() as f64;
// get monitor information
// TODO: Get rid of unwrap
let monitor = display.monitor_at_surface(&native.surface()).unwrap();
let monitor_geometry = monitor.geometry(); let monitor_geometry = monitor.geometry();
// TODO: Per documentation those dimensions should not be physical pixels. // TODO: Per documentation those dimensions should not be physical pixels.
// But on Wayland they are physical pixels and on X11 not. // But on Wayland they are physical pixels and on X11 not.
@ -683,7 +681,8 @@ mod imp {
// derived from: // derived from:
// monitor_area * occupy_area_factor == // monitor_area * occupy_area_factor ==
// (image_width * size_scale) * (image_height * size_scale) // (image_width * size_scale) * (image_height * size_scale)
let size_scale = f64::sqrt(monitor_area / image_area * occupy_area_factor); let size_scale =
f64::sqrt(monitor_area / image_area * occupy_area_factor);
// ensure that we never increase image size // ensure that we never increase image size
let target_scale = f64::min(1.0, size_scale); let target_scale = f64::min(1.0, size_scale);
let mut nat_width = image_width as f64 * target_scale; let mut nat_width = image_width as f64 * target_scale;
@ -711,16 +710,18 @@ mod imp {
} }
} }
} }
}
// fallback if monitor size or image size is not known: // fallback if monitor size or image size is not known:
// use original image size and hope for the best // use original image size and hope for the best
// TODO: We could use a small default monitor size estimate instead
let size = match orientation { let size = match orientation {
gtk::Orientation::Horizontal => image_width, gtk::Orientation::Horizontal => image_width,
gtk::Orientation::Vertical => image_height, gtk::Orientation::Vertical => image_height,
_ => unreachable!(), _ => unreachable!(),
}; };
log::warn!("Not enough information available to calculate fitting window size");
(0, size, -1, -1) (0, size, -1, -1)
} }
} }