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#!/usr/bin/env python3
"""
Generate srcset images so we can do something like:
<img src="img.png" width="4000" height="3000" alt="" srcset="img.png 4000w,
img-2000x1500.png 2000w,
img-1024x768.png 1024w,
img-768x576.png 768w,
img-300.png 225w"
sizes = "100vw">
"""
import os
from PIL import Image
import sys
def get_html_dir(curr:str="", token:str="content"):
curr = curr or os.getcwd()
ret = []
while curr != '/':
curr, child = os.path.split(curr)
if child == token:
break
ret.append(child)
ret.reverse()
return '/' + '/'.join(ret)
while current_dir != '/':
dir_name = os.path.basename(current_dir)
if target_string in dir_name:
break
current_dir = os.path.dirname(current_dir)
in_fname = sys.argv[1]
html_dir = get_html_dir()
fname_parts = os.path.splitext(in_fname)
image = Image.open(in_fname)
widths = (4000,2000,1024,768,300)
## Write files of different widths
print(f'<img src="{html_dir}/{in_fname}"')
print(f' width="{image.width}" height="{image.height}" alt=""')
print(f' srcset="{html_dir}/{in_fname} {image.width}w,')
for width in widths:
if width >= image.width:
continue
height = int((width * image.height) / image.width)
resized_image = image.resize((width, height))
## Write resized image
out_fname = f"{fname_parts[0]}-{width}x{height}{fname_parts[1]}"
resized_image.save(out_fname)
## Print html snippet
sys.stdout.write(f' {html_dir}/{out_fname} {width}w')
if width == widths[-1]:
print('" ')
else:
print(', ')
print(' sizes = "100vw">')