mirror of
https://github.com/Derpy-Leggies/OnlyLegs.git
synced 2024-12-29 10:56:10 +00:00
79 lines
2.7 KiB
Python
79 lines
2.7 KiB
Python
"""
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Tools for generating images and thumbnails
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"""
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import os
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from PIL import Image, ImageOps
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from onlylegs.config import MEDIA_FOLDER, CACHE_FOLDER
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from werkzeug.utils import secure_filename
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def generate_thumbnail(file_path, resolution, ext=None):
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"""
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Image thumbnail generator
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Uses PIL to generate a thumbnail of the image and saves it to the cache directory
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Name is the filename
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resolution: 400x400 or thumb, or any other resolution
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ext is the file extension of the image
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"""
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# Make image cache directory if it doesn't exist
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if not os.path.exists(CACHE_FOLDER):
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os.makedirs(CACHE_FOLDER)
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# no sussy business
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file_name = os.path.basename(file_path)
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file_name, file_ext = secure_filename(file_name).rsplit(".")
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if not ext:
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ext = file_ext.strip(".")
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# PIL doesnt like jpg so we convert it to jpeg
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if ext.lower() == "jpg":
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ext = "jpeg"
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# Set resolution based on preset resolutions
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if resolution in ["prev", "preview"]:
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res_x, res_y = (1920, 1080)
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elif resolution in ["thumb", "thumbnail"]:
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res_x, res_y = (400, 400)
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elif resolution in ["icon", "favicon"]:
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res_x, res_y = (10, 10)
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else:
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return None
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# If image has been already generated, return it from the cache
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if os.path.exists(os.path.join(CACHE_FOLDER, f"{file_name}_{res_x}x{res_y}.{ext}")):
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return os.path.join(CACHE_FOLDER, f"{file_name}_{res_x}x{res_y}.{ext}")
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# Check if image exists in the uploads directory
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if not os.path.exists(os.path.join(MEDIA_FOLDER, file_path, f"{file_name}.{file_ext}")):
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return None
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# Open image and rotate it based on EXIF data and get ICC profile so colors are correct
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image = Image.open(os.path.join(MEDIA_FOLDER, file_path, f"{file_name}.{file_ext}"))
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image_icc = image.info.get("icc_profile")
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img_x, img_y = image.size
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# Resize image to fit the resolution
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image = ImageOps.exif_transpose(image)
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image.thumbnail((min(img_x, int(res_x)), min(img_y, int(res_y))), Image.ANTIALIAS)
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# Save image to cache directory
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try:
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image.save(
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os.path.join(CACHE_FOLDER, f"{file_name}_{res_x}x{res_y}.{ext}"),
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icc_profile=image_icc,
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)
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except OSError:
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# This usually happens when saving a JPEG with an ICC profile,
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# so we convert to RGB and try again
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image = image.convert("RGB")
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image.save(
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os.path.join(CACHE_FOLDER, f"{file_name}_{res_x}x{res_y}.{ext}"),
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icc_profile=image_icc,
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)
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# No need to keep the image in memory, learned the hard way
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image.close()
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return os.path.join(CACHE_FOLDER, f"{file_name}_{res_x}x{res_y}.{ext}")
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