EPS Image conversion fails after upgrading to 11.2.1 / 11.3.0 from 10.4.0

What did you do?

In our company we use Pillow 11.2.1 to convert EPS images to JPG and faced issues with some of the EPS files.
When i tried it locally with Pillow 10.4.0 the conversion worked fine.
As soon as i upgraded to Pillow 11.3.0 the conversion also failed on my local environment.

What did you expect to happen?

Expected output is an .jpg image from an input .eps file

What actually happened?

Our script fails as soon as it hits the "with (Image.open(inFile) as im):"

Error:
"path/to/image.eps" : cannot identify image file "path/to/image.eps"

What are your OS, Python and Pillow versions?

OS: Windows 11 (local) / Windows 10 (company)
Python: 3.12.0
Pillow: 11.2.1 / 11.3.0

Please paste here the output of running:

python3 -m PIL.report
--------------------------------------------------------------------
Pillow 11.3.0
Python 3.12.0 (tags/v3.12.0:0fb18b0, Oct  2 2023, 13:03:39) [MSC v.1935 64 bit (AMD64)]
--------------------------------------------------------------------
Python executable is C:\Entwicklung\airflow\.venv\Scripts\python.exe
Environment Python files loaded from C:\Entwicklung\airflow\.venv
System Python files loaded from C:\Program Files\Python312
--------------------------------------------------------------------
Python Pillow modules loaded from C:\Entwicklung\airflow\.venv\Lib\site-packages\PIL
Binary Pillow modules loaded from C:\Entwicklung\airflow\.venv\Lib\site-packages\PIL
--------------------------------------------------------------------
--- PIL CORE support ok, compiled for 11.3.0
--- TKINTER support ok, loaded 8.6
--- FREETYPE2 support ok, loaded 2.13.3
--- LITTLECMS2 support ok, loaded 2.17
--- WEBP support ok, loaded 1.5.0
--- AVIF support ok, loaded 1.3.0
--- JPEG support ok, compiled for libjpeg-turbo 3.1.1
--- OPENJPEG (JPEG2000) support ok, loaded 2.5.3
--- ZLIB (PNG/ZIP) support ok, loaded 1.3.1.zlib-ng, compiled for zlib-ng 2.2.4
--- LIBTIFF support ok, loaded 4.7.0
*** RAQM (Bidirectional Text) support not installed
*** LIBIMAGEQUANT (Quantization method) support not installed
*** XCB (X protocol) support not installed
--------------------------------------------------------------------

Unfortunately i cannot provide any image the script is failing on because of company terms.

with (Image.open(inFile) as im):

            # keep original size
            imWidth, imHeight = im.size
            outFileSize = (imWidth, imHeight)

            # handle images with transparency
            # and replace transparency by white background
            if (im.mode in ("RGBA", "P")):
                newImage = Image.new("RGBA", im.size, "white")
                newImage.paste(im, (0, 0), im)

                # save final file
                newImage = newImage.convert('RGB')
                newImage = ImageOps.pad(newImage, centering=(0.5, 0.5), color="white", size=outFileSize)
                newImage.save(outFile, quality=87)
            else:
                newImage = ImageOps.pad(im, centering=(0.5, 0.5), color=getColor(im), size=outFileSize)
                newImage.save(outFile, quality=87)

Without an image to directly test on, this might not be a simple process.

Could you run this code and provide the traceback? It should provide a more specific error.

from PIL import EpsImagePlugin
EpsImagePlugin.EpsImageFile(inFile)

Seems like the file is corrupted...

Traceback (most recent call last):
  File "xxx", line 5, in <module>
    EpsImagePlugin.EpsImageFile(inFile)
  File "xxx\Lib\site-packages\PIL\ImageFile.py", line 147, in __init__
    self._open()
  File "xxx\Lib\site-packages\PIL\EpsImagePlugin.py", line 272, in _open
    raise SyntaxError(msg)
SyntaxError: not an EPS file

Thanks. So the error from that line occurs because there is an EPS comment that is longer than 255 characters.

Pillow/src/PIL/EpsImagePlugin.py

Lines 265 to 272 in 0013f95

    
           # ASCII/hexadecimal lines in an EPS file must not exceed 
        
           # 255 characters, not including line ending characters 
        
           if bytes_read >= 255: 
        
               # only enforce this for lines starting with a "%", 
        
               # otherwise assume it's binary data 
        
               if byte_arr[0] == ord("%"): 
        
                   msg = "not an EPS file" 
        
                   raise SyntaxError(msg)

The strange part is that isn't immediately obvious why that wouldn't have failed for you in 10.4.0.

Could you test Pillow 11.0.0 and 11.1.0 to see exactly which Pillow version the failure starts with?

11.0.0 and 11.1.0 are also not working...
I tried also again with 10.4.0 and there its working.
So with our files its:
11.3.0 - 11.0.0 => not working
10.4.0 => working

Talked to my boss and got a .eps which I'm allowed to share with you.
Had to zip it because eps is not supported on github.

testEPS.zip

Thanks very much.

#8281 was change in behaviour. https://github.com/python-pillow/Pillow/pull/8281/files#diff-c43e9ae25942c60787ebabdbfabddf8618c31d166f93520ea22c8547957f7e9eL337 meant that previously, Pillow stopped reading once the image data was found. Now, it continues reading, encounters "%%BeginBinary", and mistakes some of the data inside for a comment.

If you want an immediate solution, without waiting for a PR and a Pillow release, you could just trim it from the data that Pillow receives.

from PIL import Image
from io import BytesIO
with open("test.eps", "rb") as fp:
	b = BytesIO(fp.read().split(b"%%BeginBinary")[0])
	im = Image.open(b)

Thanks for the explanation I will take this to the team and we will find a solution until the PR goes throught 😄
Thank you for your fast help ❤️

I've created #9211 to resolve this.

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EPS Image conversion fails after upgrading to 11.2.1 / 11.3.0 from 10.4.0 #9210

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	# ASCII/hexadecimal lines in an EPS file must not exceed
	# 255 characters, not including line ending characters
	if bytes_read >= 255:
	# only enforce this for lines starting with a "%",
	# otherwise assume it's binary data
	if byte_arr[0] == ord("%"):
	msg = "not an EPS file"
	raise SyntaxError(msg)

EPS Image conversion fails after upgrading to 11.2.1 / 11.3.0 from 10.4.0 #9210

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radarhere commented on Sep 18, 2025

KrokoNinja commented on Sep 18, 2025

radarhere commented on Sep 18, 2025

KrokoNinja commented on Sep 18, 2025

KrokoNinja commented on Sep 18, 2025

radarhere commented on Sep 18, 2025

KrokoNinja commented on Sep 18, 2025

radarhere commented on Sep 18, 2025

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