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