Load image as sRGB

Glue code for a few libraries that correctly loads a JPEG, PNG, or (optionally) AVIF image into memory, taking into accout color profile metadata in PNG chunks, EXIF data and app markers. Converts CMYK to RGB if needed.

For Rust 1.51 or later.

[dependencies]
load_image = "2"

fn main() {
    let path = std::env::args().nth(1).expect("File name");
    // the flag is for removing alpha channel
    let img = load_image::load_image(path, false).unwrap();
}

The returned Image is:

struct Image {
    pub width: usize,
    pub height: usize,
    pub bitmap: enum ImageData {
        RGB8(Vec<RGB8>),
        RGBA8(Vec<RGBA8>),
        RGB16(Vec<RGB16>),
        RGBA16(Vec<RGBA16>),
        GRAY8(Vec<GRAY8>),
        GRAY16(Vec<GRAY16>),
        GRAYA8(Vec<GRAYA8>),
        GRAYA16(Vec<GRAYA16>),
    }
}

The bitmap is packed, so x + y * width gives the pixel at x,y.

The load_image function doesn't panic, but it uses unwinding internally. Error handling won't work in crates compiled with the panic = "abort" option.