mirror of https://github.com/Aloxaf/silicon
Implement blur/anti-aliasing on edges of window frame #232
This commit is contained in:
parent
cf3668c9ee
commit
329e58c45a
31
src/utils.rs
31
src/utils.rs
|
@ -269,31 +269,48 @@ pub(crate) fn copy_alpha(src: &RgbaImage, dst: &mut RgbaImage, x: u32, y: u32) {
|
|||
pub(crate) fn round_corner(image: &mut DynamicImage, radius: u32) {
|
||||
// draw a circle with given foreground on given background
|
||||
// then split it into four pieces and paste them to the four corner of the image
|
||||
//
|
||||
// the circle is drawn on a bigger image to avoid the aliasing
|
||||
// later it will be scaled to the correct size
|
||||
// we add +1 (to the radius) to make sure that there is also space for the border to mitigate artefacts when scaling
|
||||
// note that the +1 isn't added to the radius when drawing the circle
|
||||
let mut circle =
|
||||
RgbaImage::from_pixel(radius * 2 + 1, radius * 2 + 1, Rgba([255, 255, 255, 0]));
|
||||
RgbaImage::from_pixel((radius + 1) * 4, (radius + 1) * 4, Rgba([255, 255, 255, 0]));
|
||||
|
||||
let width = image.width();
|
||||
let height = image.height();
|
||||
|
||||
// use the bottom right pixel to get the color of the foreground
|
||||
let foreground = image.get_pixel(width - 1, height - 1);
|
||||
|
||||
// TODO: need a blur on edge
|
||||
draw_filled_circle_mut(
|
||||
&mut circle,
|
||||
(radius as i32, radius as i32),
|
||||
radius as i32,
|
||||
(((radius + 1) * 2) as i32, ((radius + 1) * 2) as i32),
|
||||
radius as i32 * 2,
|
||||
foreground,
|
||||
);
|
||||
|
||||
let part = crop_imm(&circle, 0, 0, radius, radius);
|
||||
// scale down the circle to the correct size
|
||||
let circle = resize(
|
||||
&circle,
|
||||
(radius + 1) * 2,
|
||||
(radius + 1) * 2,
|
||||
FilterType::Triangle,
|
||||
);
|
||||
|
||||
// top left
|
||||
let part = crop_imm(&circle, 1, 1, radius, radius);
|
||||
image.copy_from(&*part, 0, 0).unwrap();
|
||||
|
||||
let part = crop_imm(&circle, radius + 1, 0, radius, radius);
|
||||
// top right
|
||||
let part = crop_imm(&circle, radius + 1, 1, radius, radius);
|
||||
image.copy_from(&*part, width - radius, 0).unwrap();
|
||||
|
||||
let part = crop_imm(&circle, 0, radius + 1, radius, radius);
|
||||
// bottom left
|
||||
let part = crop_imm(&circle, 1, radius + 1, radius, radius);
|
||||
image.copy_from(&*part, 0, height - radius).unwrap();
|
||||
|
||||
// bottom right
|
||||
let part = crop_imm(&circle, radius + 1, radius + 1, radius, radius);
|
||||
image
|
||||
.copy_from(&*part, width - radius, height - radius)
|
||||
|
|
Loading…
Reference in New Issue