piotr/grocy-ql-labeler
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

drop code128

Browse source
This commit is contained in:
Piotr Oleszczyk 2025-10-02 17:01:21 +02:00
parent 377b7f1d2f
commit ae34ad07bf
1 changed files with 3 additions and 35 deletions
Download patch file Download diff file Expand all files Collapse all files

38
app.py
View file

@ -1,10 +1,7 @@
# app.py # app.py
import asyncio
from functools import lru_cache from functools import lru_cache
from typing import Optional from typing import Optional
from barcode import Code128
from barcode.writer import ImageWriter
from brother_ql.backends.helpers import send from brother_ql.backends.helpers import send
from brother_ql.conversion import convert from brother_ql.conversion import convert
from brother_ql.raster import BrotherQLRaster from brother_ql.raster import BrotherQLRaster
@ -38,30 +35,6 @@ def mm_for_px(px, dpi=DPI):
return 25.4 * px / dpi return 25.4 * px / dpi
@lru_cache(maxsize=256)
def make_code128_exact(
grocycode: str,
xdim_px: int = 2, # narrower bars reduce overall width; ~0.25mm at 300dpi
dpi: int = DPI,
) -> Image.Image:
code = Code128(grocycode, writer=ImageWriter())
pil = code.render(
writer_options={
"write_text": False,
"dpi": dpi,
"module_height": mm_for_px(TARGET_H, dpi), # exact 106 px tall
"module_width": mm_for_px(xdim_px, dpi), # integer px/narrow bar
"quiet_zone": max(2.5, 10 * mm_for_px(xdim_px, dpi)), # generous quiet zone
}
).convert(
"L"
) # keep grayscale
# Height should already be 106 px; if writer adds 1px border, crop vertically.
if pil.height != TARGET_H:
pil = pil.resize((pil.width, TARGET_H), Image.NEAREST)
return pil
@lru_cache(maxsize=256) @lru_cache(maxsize=256)
def make_datamatrix_scaled(grocycode: str) -> Image.Image: def make_datamatrix_scaled(grocycode: str) -> Image.Image:
dm = encode(grocycode.encode("utf-8")) dm = encode(grocycode.encode("utf-8"))
@ -148,7 +121,7 @@ def _ellipsize(
def make_text_panel( def make_text_panel(
product: str, due_date: Optional[str], max_width: int = 360, padding: int = 4 product: str, due_date: Optional[str], max_width: int = 480, padding: int = 4
) -> Image.Image: ) -> Image.Image:
"""Render product (wrapped to 2 lines) + due_date in a fixed-height strip. """Render product (wrapped to 2 lines) + due_date in a fixed-height strip.
@ -297,16 +270,11 @@ def make_text_panel(
@app.post("/print", summary="Print Code128 + DataMatrix side-by-side") @app.post("/print", summary="Print Code128 + DataMatrix side-by-side")
async def print_from_grocy(req: PrintRequest): async def print_from_grocy(req: PrintRequest):
try: try:
loop = asyncio.get_running_loop() dm_img = await make_datamatrix_scaled(req.grocycode)
code_img, dm_img = await asyncio.gather(
# use default x-dimension and DPI; only pass the payload
loop.run_in_executor(None, make_code128_exact, req.grocycode),
loop.run_in_executor(None, make_datamatrix_scaled, req.grocycode),
)
# Render a compact text panel; width-capped to keep label length reasonable # Render a compact text panel; width-capped to keep label length reasonable
text_panel = make_text_panel(req.product, req.due_date, max_width=360) text_panel = make_text_panel(req.product, req.due_date, max_width=360)
# compose expects a list of images # compose expects a list of images
label_img = compose_row([code_img, dm_img, text_panel], spacing=12) label_img = compose_row([dm_img, text_panel], spacing=12)
send_to_printer(label_img, req.printer_ip, req.model, req.label) send_to_printer(label_img, req.printer_ip, req.model, req.label)
except Exception: except Exception:
# optionally: log e with traceback and return a generic message # optionally: log e with traceback and return a generic message