Method clamp

std/src/gfx/lcd/buffered/mod.rs:123–130

(value: i16, max: usize)

    /// of range and the converted value otherwise.
    fn clip_xy(&self, xy: PixelsXY) -> Option<LcdXY> {
        fn clamp(value: i16, max: usize) -> Option<usize> {
            if value < 0 {
                None
            } else {
                let value = usize::try_from(value).expect("Positive value must fit");
                if value > max { None } else { Some(value) }
            }
        }

        let x = clamp(xy.x, self.size_pixels.width - 1);
        let y = clamp(xy.y, self.size_pixels.height - 1);