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[Core] Improved rendering of rounded edges #51

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Merged
SergioRibera merged 1 commit into from
Oct 22, 2024
Merged

[Core] Improved rendering of rounded edges #51

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45 changes: 22 additions & 23 deletions crates/sss_lib/src/components/round.rs
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Original file line number Diff line number Diff line change
@@ -1,46 +1,45 @@
use image::imageops::{resize, FilterType};
use image::{Pixel, Rgba, RgbaImage};
use image::{Rgba, RgbaImage};
use imageproc::drawing::draw_filled_circle_mut;

/// Round the corner of the image
pub fn round_corner(img: &mut RgbaImage, radius: u32) {
let (width, height) = img.dimensions();

let mut circle =
RgbaImage::from_pixel((radius + 1) * 4, (radius + 1) * 4, Rgba([255, 255, 255, 0]));
let scale = 3;
let scaled_radius = radius * scale;

let mut circle = RgbaImage::from_pixel(
scaled_radius * 2,
scaled_radius * 2,
Rgba([255, 255, 255, 0]),
);

draw_filled_circle_mut(
&mut circle,
(((radius + 1) * 2) as i32, ((radius + 1) * 2) as i32),
radius as i32 * 2,
(scaled_radius as i32, scaled_radius as i32),
scaled_radius as i32,
Rgba([255, 255, 255, 255]),
);
let circle = resize(
&circle,
(radius + 1) * 2,
(radius + 1) * 2,
FilterType::Triangle,
);

let circle = resize(&circle, radius * 2, radius * 2, FilterType::Gaussian);

let (c_w, c_h) = circle.dimensions();

for x in 0..radius {
for y in 0..radius {
// top left
let tl_a = circle.get_pixel(x, y).0[3];
img.get_pixel_mut(x, y).apply_with_alpha(|p| p, |_| tl_a);
// top right
let tr_a = circle.get_pixel(c_w - x - 1, y).0[3];
img.get_pixel_mut(width - x - 1, y)
.apply_with_alpha(|p| p, |_| tr_a);
// bottom left
let bl_a = circle.get_pixel(x, c_h - y - 1).0[3];
img.get_pixel_mut(x, height - y - 1)
.apply_with_alpha(|p| p, |_| bl_a);
// bottom right
let br_a = circle.get_pixel(c_w - x - 1, c_h - y - 1).0[3];
img.get_pixel_mut(width - x - 1, height - y - 1)
.apply_with_alpha(|p| p, |_| br_a);

// Top left
img.get_pixel_mut(x, y).0[3] = tl_a;
// Top right
img.get_pixel_mut(width - x - 1, y).0[3] = tr_a;
// Bottom left
img.get_pixel_mut(x, height - y - 1).0[3] = bl_a;
// Bottom right
img.get_pixel_mut(width - x - 1, height - y - 1).0[3] = br_a;
}
}
}