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# encoding: utf-8
"""
Provides objects that can characterize image streams as to content type and
size, as a required step in including them in a document.
"""
from __future__ import (
absolute_import, division, print_function, unicode_literals
)
from docx.image.bmp import Bmp
from docx.image.gif import Gif
from docx.image.jpeg import Exif, Jfif
from docx.image.png import Png
from docx.image.tiff import Tiff
SIGNATURES = (
# class, offset, signature_bytes
(Png, 0, b'\x89PNG\x0D\x0A\x1A\x0A'),
(Jfif, 6, b'JFIF'),
(Exif, 6, b'Exif'),
(Gif, 0, b'GIF87a'),
(Gif, 0, b'GIF89a'),
(Tiff, 0, b'MM\x00*'), # big-endian (Motorola) TIFF
(Tiff, 0, b'II*\x00'), # little-endian (Intel) TIFF
(Bmp, 0, b'BM'),
)
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