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"""Provides objects that can characterize image streams.
That characterization is as to content type and size, as a required step in including
them in a document.
"""
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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