write .tif to be read with photoshop

[StefanBaar]

Is it possible to put multiple images, as layers, into a tif file and have them be read by photoshop.

I tried the following,

with tifffile.TiffWriter('temp.tif') as tiff:
    for img in data:
        data_block = bytes('Adobe Photoshop Document Data Block', 'ascii') + b'\x00'
        bim = bytes('8BIM', 'ascii')
        layer = bytes('Layr', 'ascii')
        img_bytes = img.tobytes()
        img_len = len(img_bytes)
        img_len_bytes = bytes(str(img_len), 'ascii')
        all_bytes = data_block + bim + layer + img_len_bytes
        byte_length = len(all_bytes) - len(data_block)
        bytes_bytes = bytes(byte_length)
        allll = all_bytes + bytes_bytes
        metad = {"37724": str(allll)}
        
        tiff.save(img, metadata=metad)
tif.close()

which works with preview (on mac) but not photoshop. Photoshop only sees the first layer...

[cgohlke]

The code does not use the psdtags library.

Use the extratags argument in tifffile to write a valid ImageSourceData binary structure to tag #37724, e.g., extratags=[(37724, 7, len(imagesourcedata), imagesourcedata, True)]

[cgohlke]

See issue #4.

[cgohlke]

See also examples/layered_tiff.py.