"""This file lets you convert image files to knitting patterns.
"""
import PIL.Image
from ..Loader import PathLoader
from ..Dumper import JSONDumper
from .load_and_dump import decorate_load_and_dump
import os
@decorate_load_and_dump(PathLoader, JSONDumper)
[docs]def convert_image_to_knitting_pattern(path, colors=("white", "black")):
"""Load a image file such as a png bitmap of jpeg file and convert it
to a :ref:`knitting pattern file <FileFormatSpecification>`.
:param list colors: a list of strings that should be used as
:ref:`colors <png-color>`.
:param str path: ignore this. It is fulfilled by the loeder.
Example:
.. code:: python
convert_image_to_knitting_pattern().path("image.png").path("image.json")
"""
image = PIL.Image.open(path)
pattern_id = os.path.splitext(os.path.basename(path))[0]
rows = []
connections = []
pattern_set = {
"version": "0.1",
"type": "knitting pattern",
"comment": {
"source": path
},
"patterns": [
{
"name": pattern_id,
"id": pattern_id,
"rows": rows,
"connections": connections
}
]}
bbox = image.getbbox()
if not bbox:
return pattern_set
white = image.getpixel((0, 0))
min_x, min_y, max_x, max_y = bbox
last_row_y = None
for y in reversed(range(min_y, max_y)):
instructions = []
row = {"id": y, "instructions": instructions}
rows.append(row)
for x in range(min_x, max_x):
if image.getpixel((x, y)) == white:
color = colors[0]
else:
color = colors[1]
instruction = {"color": color}
instructions.append(instruction)
if last_row_y is not None:
connections.append({"from": {"id": last_row_y}, "to": {"id": y}})
last_row_y = y
return pattern_set
__all__ = ["convert_image_to_knitting_pattern"]