Avoid non-image files.

[ChrisYangTW]

Is your feature request related to a problem? Please describe.
When there are non-picture files in the folder, it will raise <PIL.UnidentifiedImageError>.

Describe the solution you'd like
The filter_images_in_image_folder_path() function on line 64 of the gallery.py code seems to be unable to avoid non-picture files, so that an exception is thrown.

Additional context
This project is very useful. The built-in image viewing program is somewhat inefficient, and I hope your project can continue to be optimized.

[Automaticism]

This should be avoided since the filtered images are only added if they are image files. And as you see it’s a png. But I can add a try catch for this issue to handle broken image files

[ChrisYangTW]

This should be avoided since the filtered images are only added if they are image files. And as you see it’s a png. But I can add a try catch for this issue to handle broken image files

Hi. Thanks for your reply.
I forgot to mention earlier that I use Mac OS, and this type of file(dot underscore ._ files) will only appear on that system.
The is_valid_image_extension() function on line 890 of the gallery.py code just judge the suffix of the file.
Since this kind of file is not a image file, PIL will throw an exception after reading it.

Personally, I patched this code here to avoid the problem. If possible, maybe you can improve it a little in the next update, although there are very few people who use Mac to play stable diffusion.😭😭😭

line 890 of gallery.py:

def is_valid_image_extension(filename): 
    ...
    if sys.platform == 'darwin' and filename.startswith('._'):
        return False
    return filename.endswith(".jpg") or filename.endswith(".jpeg") or filename.endswith(".png")

Perhaps it seems more straightforward to use try statement to avoid broken files as you said.