Loaded PCX image has smeared result #8952
Description
What did you do?
I loaded a PCX file and used the show() command. Note, I got the same issue if trying to write file as png but I figured .show() was easier to demonstrate?
What did you expect to happen?
A non smeared version of the image. (example converted in GIMP)
What actually happened?
Loading a PCX file gave me a smeared result of the image. Possibly an issue with loading the different planes?
What are your OS, Python and Pillow versions?
- OS: Windows 10
- Python: 3.13.3
- Pillow: 11.2.1
> uv run python -m PIL.report -------------------------------------------------------------------- Pillow 11.2.1 Python 3.13.3 (main, Apr 9 2025, 04:04:49) [MSC v.1943 64 bit (AMD64)] -------------------------------------------------------------------- Python executable is .....\.venv\Scripts\python.exe Environment Python files loaded from \.venv System Python files loaded from ...\AppData\Roaming\uv\python\cpython-3.13.3-windows-x86_64-none -------------------------------------------------------------------- Python Pillow modules loaded from ....\.venv\Lib\site-packages\PIL Binary Pillow modules loaded from ......\.venv\Lib\site-packages\PIL -------------------------------------------------------------------- --- PIL CORE support ok, compiled for 11.2.1 --- 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 not installed --- JPEG support ok, compiled for libjpeg-turbo 3.1.0 --- 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 -------------------------------------------------------------------- #!/usr/bin/env python3 import logging logging.root.setLevel(logging.DEBUG) logging.basicConfig(level=logging.DEBUG) from PIL import Image with Image.open("../pillow-bug/KEY.WR.PCX") as img: img.show() with Image.open("../pillow-bug/key-correct.png") as img: img.show() Use attached images:
(Note: example images are from the shareware version of Word Rescue. I hope that's okay.)