fn read_file_mipmaps(path: &impl AsRef<Path>) -> Result<Vec<ImageBufferU8>> {
    let image_file = image::open(path)?.into_rgba8();
    let (width, height) = (image_file.width(), image_file.height());
    let mip_levels = (height.max(width) as f32).log2().floor() as u32 + 1;

    let mut mipmaps = Vec::with_capacity(mip_levels as usize);
    mipmaps.push(image_file.clone());
    for mipmap_level in 1..mip_levels {
        use image::imageops;
        let mipmap = imageops::resize(
            &image_file,
            width >> mipmap_level,
            height >> mipmap_level,
            imageops::FilterType::Gaussian,
        );
        mipmaps.push(mipmap);
    }

    Ok(mipmaps)
}
/// Read a file as an rgba8 image. Mipmaps are automatically generated based
/// on the file size and a Gaussian filter. The returned list is the set of
/// all image mipmaps in a R8G8B8A8 format.
Read a file as an rgba8 image. Mipmaps are automatically generated based
on the file size and a Gaussian filter. The returned list is the set of
all image mipmaps in a R8G8B8A8 format.
Read a file as an rgba8 image . Mipmaps are automatically generated based on the file size and a Gaussian filter . The returned list is the set of all image mipmaps in a R8G8B8A8 format .
fn read_file_mipmaps(path: &impl AsRef<Path>) -> Result<Vec<ImageBufferU8>> {
    let image_file = image::open(path)?.into_rgba8();
    let (width, height) = (image_file.width(), image_file.height());
    let mip_levels = (height.max(width) as f32).log2().floor() as u32 + 1;
    let mut mipmaps = Vec::with_capacity(mip_levels as usize);
    mipmaps.push(image_file.clone());
    for mipmap_level in 1..mip_levels {
        use image::imageops;
        let mipmap = imageops::resize(
            &image_file,
            width >> mipmap_level,
            height >> mipmap_level,
            imageops::FilterType::Gaussian,
        );
        mipmaps.push(mipmap);
    }
    Ok(mipmaps)
}
fn read_file_mipmaps ( path : & impl AsRef < Path > ) -> Result < Vec < ImageBufferU8 > > { let image_file = image :: open ( path ) ? . into_rgba8 ( ) ; let ( width , height ) = ( image_file . width ( ) , image_file . height ( ) ) ; let mip_levels = ( height . max ( width ) as f32 ) . log2 ( ) . floor ( ) as u32 + 1 ; let mut mipmaps = Vec :: with_capacity ( mip_levels as usize ) ; mipmaps . push ( image_file . clone ( ) ) ; for mipmap_level in 1 .. mip_levels { use image :: imageops ; let mipmap = imageops :: resize ( & image_file , width >> mipmap_level , height >> mipmap_level , imageops :: FilterType :: Gaussian , ) ; mipmaps . push ( mipmap ) ; } Ok ( mipmaps ) }
Read a file as an rgba8 image.
Read a file as an rgba8 image .
path
&impl AsRef<Path>