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main.rs
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main.rs
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// Copyright © SixtyFPS GmbH <info@slint-ui.com>
// SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-commercial
use slint::SharedString;
use std::rc::Rc;
#[cfg(target_arch = "wasm32")]
use wasm_bindgen::prelude::*;
slint::slint! {
import { Slider, HorizontalBox, VerticalBox, GroupBox, ComboBox } from "std-widgets.slint";
export MainWindow := Window {
title: "Slint Image Filter Integration Example";
preferred-width: 800px;
preferred-height: 600px;
property original-image <=> original.source;
property filters <=> filter-combo.model;
callback filter-image(int) -> image;
HorizontalBox {
VerticalBox {
Text {
font-size: 20px;
text: "Original Image";
horizontal-alignment: center;
}
original := Image { }
}
VerticalBox {
alignment: center;
filter-combo := ComboBox {
current-value: "Blur";
current-index: 0;
vertical-stretch: 0;
}
}
VerticalBox {
Text {
font-size: 20px;
text: "Filtered Image";
horizontal-alignment: center;
}
Image {
source: filter-image(filter-combo.current-index);
}
}
}
}
}
struct Filter {
name: SharedString,
apply_function: fn(&image::RgbaImage) -> image::RgbaImage,
}
struct Filters(Vec<Filter>);
impl slint::Model for Filters {
type Data = SharedString;
fn row_count(&self) -> usize {
self.0.len()
}
fn row_data(&self, row: usize) -> Option<Self::Data> {
self.0.get(row).map(|x| x.name.clone())
}
fn model_tracker(&self) -> &dyn slint::ModelTracker {
&()
}
}
#[cfg_attr(target_arch = "wasm32", wasm_bindgen(start))]
pub fn main() {
// This provides better error messages in debug mode.
// It's disabled in release mode so it doesn't bloat up the file size.
#[cfg(all(debug_assertions, target_arch = "wasm32"))]
console_error_panic_hook::set_once();
let main_window = MainWindow::new();
#[cfg(target_arch = "wasm32")]
let source_image = image::load_from_memory(include_bytes!("cat.jpg")).unwrap().into_rgba8();
#[cfg(not(target_arch = "wasm32"))]
let source_image = {
let mut cat_path = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"));
cat_path.push("cat.jpg");
image::open(&cat_path).expect("Error loading cat image").into_rgba8()
};
main_window.set_original_image(slint::Image::from_rgba8(
slint::SharedPixelBuffer::clone_from_slice(
source_image.as_raw(),
source_image.width(),
source_image.height(),
),
));
let filters = Filters(vec![
Filter {
name: "Blur".into(),
apply_function: |image: &image::RgbaImage| image::imageops::blur(image, 4.),
},
Filter {
name: "Brighten".into(),
apply_function: |image: &image::RgbaImage| {
image::imageops::colorops::brighten(image, 30)
},
},
Filter {
name: "Darken".into(),
apply_function: |image: &image::RgbaImage| {
image::imageops::colorops::brighten(image, -30)
},
},
Filter {
name: "Increase Contrast".into(),
apply_function: |image: &image::RgbaImage| {
image::imageops::colorops::contrast(image, 30.)
},
},
Filter {
name: "Decrease Contrast".into(),
apply_function: |image: &image::RgbaImage| {
image::imageops::colorops::contrast(image, -30.)
},
},
Filter {
name: "Invert".into(),
apply_function: |image: &image::RgbaImage| {
let mut inverted = image.clone();
image::imageops::colorops::invert(&mut inverted);
inverted
},
},
]);
let filters = Rc::new(filters);
main_window.set_filters(slint::ModelRc::from(filters.clone()));
main_window.on_filter_image(move |filter_index| {
let filter_fn = filters.0[filter_index as usize].apply_function;
let filtered_image = filter_fn(&source_image);
slint::Image::from_rgba8(slint::SharedPixelBuffer::clone_from_slice(
filtered_image.as_raw(),
filtered_image.width(),
filtered_image.height(),
))
});
main_window.run();
}