libheif-sys is bindings to libheif

System dependencies

• libheif-dev >= 1.5.0

Example of reading and decoding of HEIF-image

```rust use std::ffi; use std::mem::MaybeUninit; use std::ptr;

use libheif_sys as lh;

[test]

unsafe fn readanddecodeheicfile() { unsafe { let ctx = lh::heifcontextalloc(); assertne!(ctx, ptr::nullmut());

    let c_name = ffi::CString::new("tests/window.heic").unwrap();
    let err = lh::heif_context_read_from_file(ctx, c_name.as_ptr(), ptr::null());
    assert_eq!(err.code, 0);

    let mut handle = MaybeUninit::<_>::uninit();
    let err = lh::heif_context_get_primary_image_handle(ctx, handle.as_mut_ptr());
    assert_eq!(err.code, 0);

    let handle = handle.assume_init();
    let width = lh::heif_image_handle_get_width(handle);
    assert_eq!(width, 4032);
    let height = lh::heif_image_handle_get_height(handle);
    assert_eq!(height, 3024);

    let options = lh::heif_decoding_options_alloc();

    let mut image = MaybeUninit::<_>::uninit();
    let err = lh::heif_decode_image(
        handle,
        image.as_mut_ptr(),
        lh::heif_colorspace_heif_colorspace_undefined,
        lh::heif_chroma_heif_chroma_undefined,
        options,
    );
    lh::heif_decoding_options_free(options);
    assert_eq!(err.code, 0);

    let image = image.assume_init();
    let width = lh::heif_image_get_width(image, lh::heif_channel_heif_channel_Y);
    assert_eq!(width, 4032);
    let height = lh::heif_image_get_height(image, lh::heif_channel_heif_channel_Y);
    assert_eq!(height, 3024);

    lh::heif_context_free(ctx)
};

} ```