const g_format_jpg

g_format_jpg constant varchar2(3):='jpg'

const g_format_png

g_format_png constant varchar2(3):='png'

const g_format_gif

g_format_gif constant varchar2(3):='gif'

function is_image

function is_image(
    p_file in blob,
    p_format in varchar2:=null
) return boolean

returns true if blob is image

function get_image_info

function get_image_info(
    p_file in blob
) return t_image_info

get image information

record t_image_info

type t_image_info is record(
    adler32 varchar2(8),
    width pls_integer,
    height pls_integer,
    color_res pls_integer,
    color_tab raw(768),
    greyscale boolean,
    pixels blob,
    type varchar2(5),
    nr_colors pls_integer,
    transparency_index pls_integer
)