extern crate libc;

#[repr(C)]
#[derive(Debug)]
pub struct GeglRectangle {
    pub x: i32,
    pub y: i32,
    pub width: i32,
    pub height: i32,
}

pub enum CGeglNode {}
pub enum GeglBuffer {}

#[link(name="gegl-0.3")]
extern {
    pub fn gegl_init(argc: *mut i32, argv: *mut *mut libc::c_char);
    pub fn gegl_node_new() -> *mut CGeglNode;
    pub fn gegl_node_create_child(parent: *mut CGeglNode,
                                  operation: *const libc::c_char)
                                  -> *mut CGeglNode;
    pub fn gegl_node_set_property(node: *mut CGeglNode,
                                  property_name: *const libc::c_char,
                                  value: *const libc::c_void);
    pub fn gegl_node_link(source: *mut CGeglNode,
                          sink: *mut CGeglNode);
    pub fn gegl_node_process(node: *mut CGeglNode);
    pub fn gegl_exit();
    pub fn gegl_buffer_new(extent: *mut libc::c_void, format: *mut libc::c_void)
                           -> *mut GeglBuffer;
    pub fn gegl_buffer_get_extent(buffer: *const libc::c_void) ->
        *const GeglRectangle;


    pub fn g_object_unref(object: *mut libc::c_void);
    pub fn g_free(object: *mut libc::c_void);

    pub fn gegl_list_operations(num_operations: *mut usize)
                                -> *mut *const libc::c_char;
}