switch from treepoem
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parent
c6dcb50bbb
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3 changed files with 77 additions and 56 deletions
83
app.py
83
app.py
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@ -1,14 +1,18 @@
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# app.py
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import asyncio
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from functools import lru_cache
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from io import BytesIO
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from fastapi import FastAPI, HTTPException
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from pydantic import BaseModel, Field
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from typing import List
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from PIL import Image, ImageOps
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import treepoem
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from brother_ql.raster import BrotherQLRaster
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from brother_ql.conversion import convert
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from barcode import Code128
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from barcode.writer import ImageWriter
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from brother_ql.backends.helpers import send
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from brother_ql.conversion import convert
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from brother_ql.raster import BrotherQLRaster
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from fastapi import FastAPI, HTTPException
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from PIL import Image, ImageOps
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from pydantic import BaseModel, Field
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from pylibdmtx.pylibdmtx import encode
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if not hasattr(Image, "ANTIALIAS"):
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Image.ANTIALIAS = Image.Resampling.LANCZOS
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@ -16,6 +20,29 @@ if not hasattr(Image, "ANTIALIAS"):
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app = FastAPI(title="QL-1060N Stacked Barcode Printer")
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@lru_cache(maxsize=256)
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def make_code128(data: str) -> Image.Image:
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writer_opts = {
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"module_height": 15.0,
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"module_width": 0.5,
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"quiet_zone": 1.0,
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"font_size": 10,
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"text_distance": 1.0,
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}
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code = Code128(
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data, writer=ImageWriter(), add_checksum=False, writer_options=writer_opts
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)
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pil_img = code.render(writer_opts) # returns RGB
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return pil_img.convert("1")
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@lru_cache(maxsize=256)
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def make_datamatrix(data: str) -> Image.Image:
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dm = encode(data.encode("utf-8"))
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pil_img = Image.frombytes("RGB", (dm.width, dm.height), dm.pixels)
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return pil_img.convert("1")
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class PrintRequest(BaseModel):
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data: str = Field(..., description="String to encode")
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printer_ip: str = Field(
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@ -25,35 +52,8 @@ class PrintRequest(BaseModel):
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label: str = Field("12", description="12 mm continuous tape")
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def make_barcode_image(data: str, symb: str) -> Image.Image:
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"""Generate a monochrome barcode image via BWIPP."""
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if symb == "code128":
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img = treepoem.generate_barcode(
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barcode_type="code128",
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data=data,
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options={"includetext": True, "height": "0.3"},
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scale=2,
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)
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else: # rectangular DataMatrix
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img = treepoem.generate_barcode(
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barcode_type="datamatrixrectangular",
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data=data,
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options={},
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# options={"columns": "16", "rows": "48"},
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scale=2,
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)
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return img.convert("1")
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def compose_label(images: List[Image.Image]) -> Image.Image:
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"""
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Horizontally stack each barcode image with padding,
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on a single monochrome canvas.
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"""
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border = 10 # white border around each barcode
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spacing = 20 # gap between them
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# add border
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border, spacing = 10, 20
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framed = [ImageOps.expand(img, border=border, fill="white") for img in images]
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max_h = max(img.height for img in framed)
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total_w = sum(img.width for img in framed) + spacing * (len(framed) - 1)
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@ -69,9 +69,6 @@ def compose_label(images: List[Image.Image]) -> Image.Image:
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def send_to_printer(image: Image.Image, printer_ip: str, model: str, label: str):
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"""
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Rasterize the PIL image for Brother QL and send it via network.
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"""
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qlr = BrotherQLRaster(model)
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qlr.exception_on_warning = True
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@ -79,7 +76,7 @@ def send_to_printer(image: Image.Image, printer_ip: str, model: str, label: str)
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qlr=qlr,
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images=[image],
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label=label,
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rotate="90",
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rotate="90", # landscape
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threshold=70.0,
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dither=False,
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compress=True,
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@ -95,12 +92,16 @@ def send_to_printer(image: Image.Image, printer_ip: str, model: str, label: str)
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@app.post("/print", summary="Print Code128 + DataMatrix side-by-side")
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def print_stacked(req: PrintRequest):
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async def print_stacked(req: PrintRequest):
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try:
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code_img = make_barcode_image(req.data, "code128")
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dm_img = make_barcode_image(req.data, "datamatrix_rect")
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loop = asyncio.get_running_loop()
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code_task = loop.run_in_executor(None, make_code128, req.data)
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dm_task = loop.run_in_executor(None, make_datamatrix, req.data)
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code_img, dm_img = await asyncio.gather(code_task, dm_task)
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label_img = compose_label([code_img, dm_img])
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send_to_printer(label_img, req.printer_ip, req.model, req.label)
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except Exception as e:
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raise HTTPException(status_code=500, detail=str(e))
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@ -7,8 +7,13 @@ requires-python = ">=3.11"
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dependencies = [
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"brother-ql>=0.9.4",
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"fastapi>=0.115.13",
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"packaging>=25.0",
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"pillow>=11.2.1",
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"pydantic>=2.11.7",
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"treepoem>=3.27.1",
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"pylibdmtx",
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"python-barcode>=0.15.1",
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"uvicorn>=0.34.3",
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]
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[tool.uv.sources]
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pylibdmtx = { git = "https://github.com/NaturalHistoryMuseum/pylibdmtx.git" }
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43
uv.lock
generated
43
uv.lock
generated
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@ -102,9 +102,11 @@ source = { virtual = "." }
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dependencies = [
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{ name = "brother-ql" },
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{ name = "fastapi" },
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{ name = "packaging" },
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{ name = "pillow" },
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{ name = "pydantic" },
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{ name = "treepoem" },
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{ name = "pylibdmtx" },
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{ name = "python-barcode" },
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{ name = "uvicorn" },
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]
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@ -112,9 +114,11 @@ dependencies = [
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requires-dist = [
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{ name = "brother-ql", specifier = ">=0.9.4" },
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{ name = "fastapi", specifier = ">=0.115.13" },
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{ name = "packaging", specifier = ">=25.0" },
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{ name = "pillow", specifier = ">=11.2.1" },
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{ name = "pydantic", specifier = ">=2.11.7" },
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{ name = "treepoem", specifier = ">=3.27.1" },
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{ name = "pylibdmtx", git = "https://github.com/NaturalHistoryMuseum/pylibdmtx.git" },
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{ name = "python-barcode", specifier = ">=0.15.1" },
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{ name = "uvicorn", specifier = ">=0.34.3" },
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]
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@ -136,6 +140,15 @@ wheels = [
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{ url = "https://files.pythonhosted.org/packages/76/c6/c88e154df9c4e1a2a66ccf0005a88dfb2650c1dffb6f5ce603dfbd452ce3/idna-3.10-py3-none-any.whl", hash = "sha256:946d195a0d259cbba61165e88e65941f16e9b36ea6ddb97f00452bae8b1287d3", size = 70442, upload-time = "2024-09-15T18:07:37.964Z" },
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]
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[[package]]
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name = "packaging"
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version = "25.0"
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source = { registry = "https://pypi.org/simple" }
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sdist = { url = "https://files.pythonhosted.org/packages/a1/d4/1fc4078c65507b51b96ca8f8c3ba19e6a61c8253c72794544580a7b6c24d/packaging-25.0.tar.gz", hash = "sha256:d443872c98d677bf60f6a1f2f8c1cb748e8fe762d2bf9d3148b5599295b0fc4f", size = 165727, upload-time = "2025-04-19T11:48:59.673Z" }
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wheels = [
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{ url = "https://files.pythonhosted.org/packages/20/12/38679034af332785aac8774540895e234f4d07f7545804097de4b666afd8/packaging-25.0-py3-none-any.whl", hash = "sha256:29572ef2b1f17581046b3a2227d5c611fb25ec70ca1ba8554b24b0e69331a484", size = 66469, upload-time = "2025-04-19T11:48:57.875Z" },
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]
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[[package]]
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name = "packbits"
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version = "0.6"
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@ -281,6 +294,20 @@ wheels = [
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{ url = "https://files.pythonhosted.org/packages/32/56/8a7ca5d2cd2cda1d245d34b1c9a942920a718082ae8e54e5f3e5a58b7add/pydantic_core-2.33.2-pp311-pypy311_pp73-win_amd64.whl", hash = "sha256:329467cecfb529c925cf2bbd4d60d2c509bc2fb52a20c1045bf09bb70971a9c1", size = 2066757, upload-time = "2025-04-23T18:33:30.645Z" },
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]
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[[package]]
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name = "pylibdmtx"
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version = "0.1.11"
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source = { git = "https://github.com/NaturalHistoryMuseum/pylibdmtx.git#00a6e0691db6cd2951d5b4614a9825962f53a7ff" }
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[[package]]
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name = "python-barcode"
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version = "0.15.1"
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source = { registry = "https://pypi.org/simple" }
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sdist = { url = "https://files.pythonhosted.org/packages/22/63/bc2fb47c9ba904b376780917f053b1c85b87085fd44948590e71c11187b0/python-barcode-0.15.1.tar.gz", hash = "sha256:3b1825fbdb11e597466dff4286b4ea9b1e86a57717b59e563ae679726fc854de", size = 228161, upload-time = "2023-07-05T22:56:59.962Z" }
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wheels = [
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{ url = "https://files.pythonhosted.org/packages/10/27/9b5c5bb1938d4e6b12f4c95f40ea905c11df3cd58e128e9305397b9a2697/python_barcode-0.15.1-py3-none-any.whl", hash = "sha256:057636fba37369c22852410c8535b36adfbeb965ddfd4e5b6924455d692e0886", size = 212956, upload-time = "2023-07-05T22:56:58.596Z" },
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]
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[[package]]
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name = "pyusb"
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version = "1.3.1"
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@ -311,18 +338,6 @@ wheels = [
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{ url = "https://files.pythonhosted.org/packages/8b/0c/9d30a4ebeb6db2b25a841afbb80f6ef9a854fc3b41be131d249a977b4959/starlette-0.46.2-py3-none-any.whl", hash = "sha256:595633ce89f8ffa71a015caed34a5b2dc1c0cdb3f0f1fbd1e69339cf2abeec35", size = 72037, upload-time = "2025-04-13T13:56:16.21Z" },
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]
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[[package]]
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name = "treepoem"
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version = "3.27.1"
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source = { registry = "https://pypi.org/simple" }
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dependencies = [
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{ name = "pillow" },
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]
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sdist = { url = "https://files.pythonhosted.org/packages/d2/75/adcea502d2a4832847b096df58fa69a5bfa3581ecaf9dda3fb066a38d304/treepoem-3.27.1.tar.gz", hash = "sha256:471769fdbc0e9fce37d9f139446db1763ba1c93d4f823e398b364c2a71f8429c", size = 375487, upload-time = "2025-03-22T11:24:13.115Z" }
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wheels = [
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{ url = "https://files.pythonhosted.org/packages/58/93/b943eed507664fbfe81f27dce690bcebe7d4c67edfd615109e137e8d751c/treepoem-3.27.1-py3-none-any.whl", hash = "sha256:8f929b0686fa40bdfe7b2fb0a134a3266481cd321a234ec7a279d7bac07d55a7", size = 372013, upload-time = "2025-03-22T11:24:11.076Z" },
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]
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[[package]]
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name = "typing-extensions"
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version = "4.14.0"
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