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fractional-scale: implement accurate rounding

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This commit is contained in:
Julian Orth 2024-10-22 11:11:29 +02:00
parent cc426a0a4a
commit e2806a6337
5 changed files with 41 additions and 14 deletions
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10
src/renderer/renderer_base.rs
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@ -30,8 +30,7 @@ impl RendererBase<'_> {
pub fn scale_point(&self, mut x: i32, mut y: i32) -> (i32, i32) {
if self.scaled {
x = (x as f64 * self.scalef).round() as _;
y = (y as f64 * self.scalef).round() as _;
[x, y] = self.scale.pixel_size([x, y]);
}
(x, y)
}
@ -46,10 +45,9 @@ impl RendererBase<'_> {
pub fn scale_rect(&self, mut rect: Rect) -> Rect {
if self.scaled {
let x1 = (rect.x1() as f64 * self.scalef).round() as _;
let y1 = (rect.y1() as f64 * self.scalef).round() as _;
let x2 = (rect.x2() as f64 * self.scalef).round() as _;
let y2 = (rect.y2() as f64 * self.scalef).round() as _;
let [x1, y1, x2, y2] =
self.scale
.pixel_size([rect.x1(), rect.y1(), rect.x2(), rect.y2()]);
rect = Rect::new(x1, y1, x2, y2).unwrap();
}
rect