/// Generate an image that best fits `size` while preserving scale.
/// Returns generated file.
Generate an image that best fits `size` while preserving scale.
Returns generated file.
Generate an image that best fits ` size ` while preserving scale . Returns generated file .
fn resize(fp: &PathBuf, size: &FileSize, out: &PathBuf) -> std::io::Result<std::fs::File> {
    let img = image::open(&fp).unwrap();
    let img = img.thumbnail(
        size.width.unwrap_or(img.width()),
        size.height.unwrap_or(img.height())
    );
    let mut file = std::fs::OpenOptions::new()
        .create_new(true)
        .write(true)
        .read(true)
        .open(&out)?;
    let ext = out.extension()
        .and_then(|s| s.to_str())
        .map_or("".to_owned(), |s| s.to_ascii_lowercase());
    img.write_to(&mut file, guess_format(&ext).unwrap()).unwrap();
    Ok(file)
}
fn resize ( fp : & PathBuf , size : & FileSize , out : & PathBuf ) -> std :: io :: Result < std :: fs :: File > { let img = image :: open ( & fp ) . unwrap ( ) ; let img = img . thumbnail ( size . width . unwrap_or ( img . width ( ) ) , size . height . unwrap_or ( img . height ( ) ) ) ; let mut file = std :: fs :: OpenOptions :: new ( ) . create_new ( true ) . write ( true ) . read ( true ) . open ( & out ) ? ; let ext = out . extension ( ) . and_then ( | s | s . to_str ( ) ) . map_or ( " " . to_owned ( ) , | s | s . to_ascii_lowercase ( ) ) ; img . write_to ( & mut file , guess_format ( & ext ) . unwrap ( ) ) . unwrap ( ) ; Ok ( file ) }
Generate an image that best fits `size` while preserving scale.
Generate an image that best fits ` size ` while preserving scale .
fp
&PathBuf
size
&FileSize
out
&PathBuf