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feat(core): introduce new color functions

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cepetr 2024-02-21 08:26:42 +01:00 committed by cepetr
parent 474484d249
commit 9575c81bd3
1 changed files with 14 additions and 0 deletions
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14
core/embed/rust/src/ui/display/color.rs
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@ -86,6 +86,20 @@ impl Color {
pub const fn black() -> Self {
Self::rgb(0, 0, 0)
}
/// Blends the color of `self` with the color of `fg` using specified
/// `alpha` value (ranging from 0 to 255).
///
/// If `alpha` equals 0, the background color (`self`) is used.
/// If `alpha` equals 255, the foreground color (`fg`) is used.
pub fn blend(self, fg: Color, alpha: u8) -> Color {
let fg_mul = alpha as u16;
let bg_mul = (255 - alpha) as u16;
let r = (fg.r() as u16) * fg_mul + (self.r() as u16) * bg_mul;
let g = (fg.g() as u16) * fg_mul + (self.g() as u16) * bg_mul;
let b = (fg.b() as u16) * fg_mul + (self.b() as u16) * bg_mul;
Color::rgb((r >> 8) as u8, (g >> 8) as u8, (b >> 8) as u8)
}
}
impl Lerp for Color {