grixy 0.6.0-alpha.2

Zero-cost 2D grids for embedded systems and graphics
Documentation 
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use crate::{
    core::{Pos, Size},
    ops::{ExactSizeGrid, GridBase, GridRead},
};

/// Scales the grid elements using a nearest-neighbor approach.
///
/// See [`GridConvertExt::scale`][] for usage.
///
/// [`GridConvertExt::scale`]: crate::transform::GridConvertExt::scale
pub struct Scaled<G> {
    pub(super) source: G,
    pub(super) scale: usize,
}

impl<G> GridBase for Scaled<G>
where
    G: GridBase,
{
    fn size_hint(&self) -> (Size, Option<Size>) {
        let (lo, hi) = self.source.size_hint();
        (lo * self.scale, hi.map(|s| s * self.scale))
    }
}

impl<G> ExactSizeGrid for Scaled<G>
where
    G: ExactSizeGrid,
{
    fn width(&self) -> usize {
        self.source.width() * self.scale
    }

    fn height(&self) -> usize {
        self.source.height() * self.scale
    }
}

impl<G> GridRead for Scaled<G>
where
    G: GridRead,
{
    type Element<'b>
        = G::Element<'b>
    where
        Self: 'b;

    /// The layout of the grid.
    type Layout = G::Layout;

    fn get(&self, pos: Pos) -> Option<Self::Element<'_>> {
        self.source.get(pos / self.scale)
    }
}