pub fn resize_rgba(
pixels: &[u8],
(width, height): (u32, u32),
(new_width, new_height): (u32, u32),
) -> Result<Vec<u8>, String>Expand description
Straight-alpha RGBA pixels, width x height, resized to
new_width x new_height: each axis resampled by a tent filter as wide
as a source pixel or an output pixel, whichever is wider, so an axis that
shrinks averages what each output pixel covers (as a proxy averages its
blocks) and one that grows interpolates. Colour is weighted by alpha, so a
transparent pixel’s colour does not bleed into its neighbours. An axis
that keeps its size is left exactly as it is.
§Errors
Returns a message for an empty size or a buffer that is not
width x height pixels.