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UnidentifiedImageError opening simple PSD using shapes and masks #8034

@ppearsonhutch

Description

@ppearsonhutch

What did you do?

Attempted to open the supplied psd image with PIL.open() in python.

I didn't actually create this image myself, nor can I figure out what exactly is wrong with it, but I've managed to reduce the cause of the issue down to 2 shape layers, one with a layer mask. Removing either layer fixes the error. Additionally, inserting a new empty layer between the two layers also fixes the error. So it's not critical and I can work around it, but I have a feeling it's a bug in the psd opening logic if it's somehow fixed by adding blank layers.

Image below of the layers:
Screenshot 2024-04-30 at 21 34 44

What did you expect to happen?

No PIL.UnidentifiedImageError when opening the PSD.

What actually happened?

Received a PIL.UnidentifiedImageError when opening the PSD with PIL.open()

What are your OS, Python and Pillow versions?

  • OS: MacOS Sonoma 14.4.1
  • Python: 3.9.6 (via shim/pyenv)
  • Pillow: 10.3.0 (via pip)
--------------------------------------------------------------------
Pillow 10.3.0
Python 3.9.6 (default, Apr  6 2024, 22:52:34)
       [Clang 15.0.0 (clang-1500.3.9.4)]
--------------------------------------------------------------------
Python executable is /Users/<username>/.pyenv/versions/3.9.6/bin/python3
System Python files loaded from /Users/<username>/.pyenv/versions/3.9.6
--------------------------------------------------------------------
Python Pillow modules loaded from /Users/<username>/.pyenv/versions/3.9.6/lib/python3.9/site-packages/PIL
Binary Pillow modules loaded from /Users/<username>/.pyenv/versions/3.9.6/lib/python3.9/site-packages/PIL
--------------------------------------------------------------------
--- PIL CORE support ok, compiled for 10.3.0
--- TKINTER support ok, loaded 8.6
--- FREETYPE2 support ok, loaded 2.13.2
--- LITTLECMS2 support ok, loaded 2.16
--- WEBP support ok, loaded 1.3.2
--- WEBP Transparency support ok
--- WEBPMUX support ok
--- WEBP Animation support ok
--- JPEG support ok, compiled for libjpeg-turbo 3.0.2
--- OPENJPEG (JPEG2000) support ok, loaded 2.5.2
--- ZLIB (PNG/ZIP) support ok, loaded 1.3.1
--- LIBTIFF support ok, loaded 4.6.0
*** RAQM (Bidirectional Text) support not installed
*** LIBIMAGEQUANT (Quantization method) support not installed
--- XCB (X protocol) support ok
--------------------------------------------------------------------

Image is attached as zip because github doesn't allow psd attachments.
ExamplePSD.psd.zip (29kb)

Code to reproduce (simple open PSD script):

import sys
import PIL
from PIL import Image

def open_psd(psd_file_path):
    # Open the PSD file
    psd_image = Image.open(psd_file_path)
    
if __name__ == "__main__":
    if len(sys.argv) != 2:
        print("Usage: python3 piltest.py <input_psd_path>")
    else:
        psd_file_path = sys.argv[1]
        open_psd(psd_file_path)

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