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size 0,0 image use .save()/.tobytes() throw SystemError: tile cannot extend outside image #5931

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#5938
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size 0,0 image use .save()/.tobytes() throw SystemError: tile cannot extend outside image#5931
#5938

Description

@NewUserHa
NewUserHa
opened on Jan 4, 2022

What did you do?

Create a size (0,0) image instead of None, for convenient in coding,

x.width
x.height
# other stuffs
x.tobytes()

to get rid of

if x:
    x.width
    x.height
   # other stuffs
    x.tobytes()

What did you expect to happen?

Normal, probably return b''

What actually happened?

---------------------------------------------------------------------------
SystemError                               Traceback (most recent call last)
<ipython-input-0-d240cdef7328> in <module>
----> 1 Image.new("RGB",(0,0)).tobytes()

c:\program files\python38\lib\site-packages\PIL\Image.py in tobytes(self, encoder_name, *args)
    720         # unpack data
    721         e = _getencoder(self.mode, encoder_name, args)
--> 722         e.setimage(self.im)
    723
    724         bufsize = max(65536, self.size[0] * 4)  # see RawEncode.c

SystemError: tile cannot extend outside image

What are your OS, Python and Pillow versions?

  • OS: Win10 1803
  • Python: 3.8.10
  • Pillow: 9.0.0
from PIL import Image
Image.new("RGB",(0,0)).tobytes()

Activity

  1. NewUserHa commented on Jan 5, 2022

    @NewUserHa
    NewUserHa
    on Jan 5, 2022
    Author

    .save throw the same error as well.

  2. NewUserHa
    changed the title [-]size 0,0 image use .tobytes() throw `SystemError: tile cannot extend outside image`[/-] [+]size 0,0 image use `.save()`/`.tobytes()` throw `SystemError: tile cannot extend outside image`[/+] on Jan 5, 2022

  3. radarhere commented on Jan 5, 2022

    @radarhere
    radarhere
    on Jan 5, 2022
    Member

    Just to be clear, what format are trying to save the image as?

  4. NewUserHa commented on Jan 5, 2022

    @NewUserHa
    NewUserHa
    on Jan 5, 2022
    Author

    the .save is .jpg

  5. radarhere commented on Jan 7, 2022

    @radarhere
    radarhere
    on Jan 7, 2022
    Member

    When I try and save a (0, 0) JPEG, if I push past the Pillow error, I get "Empty JPEG image (DNL not supported)" which is coming from libjpeg itself - https://github.com/freedesktop/libjpeg/blob/b4f886fcbb692e20fb4da4e6e3ead57f79444734/jcmaster.c#L54-L57. So it doesn't look like it is possible to create a (0, 0) JPEG file.

    I've created PR #5938 to fix the error coming from tobytes().

  6. hugovk
    closed this as completedin #5938on Jan 7, 2022

  7. NewUserHa commented on Jan 7, 2022

    @NewUserHa
    NewUserHa
    on Jan 7, 2022
    Author

    I searched a few minutes, it seems like .jpg, .png don't support size 0x0 image. but no info for .tiff and other formats.

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