mirror of
https://github.com/python-pillow/Pillow.git
synced 2025-05-01 14:33:40 +03:00
35 lines
965 B
ReStructuredText
35 lines
965 B
ReStructuredText
Limits
|
|
------
|
|
|
|
This page is documentation to the various fundamental size limits in
|
|
the Pillow implementation.
|
|
|
|
Internal limits
|
|
===============
|
|
|
|
* Image sizes cannot be negative. These are checked both in
|
|
``Storage.c`` and ``Image.py``
|
|
|
|
* Image sizes may be 0. (Although not in 3.4)
|
|
|
|
* Maximum pixel dimensions are limited to INT32, or 2^31 by the sizes
|
|
in the image header.
|
|
|
|
* Individual allocations are limited to 2GB in ``Storage.c``
|
|
|
|
* The 2GB allocation puts an upper limit to the xsize of the image of
|
|
either 2^31 for 'L' or 2^29 for 'RGB'
|
|
|
|
* Individual memory mapped segments are limited to 2GB in map.c based
|
|
on the overflow checks. This requires that any memory mapped image
|
|
is smaller than 2GB, as calculated by ``y*stride`` (so 2Gpx for 'L'
|
|
images, and .5Gpx for 'RGB'
|
|
|
|
Format size limits
|
|
==================
|
|
|
|
* ICO: Max size is 256x256
|
|
|
|
* WebP: 16383x16383 (underlying library size limit:
|
|
https://developers.google.com/speed/webp/docs/api)
|