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devdesk 2023-06-09 13:47:37 +03:00
parent 89ca008b87
commit 0dc0b7dc9b
3 changed files with 157 additions and 1 deletions
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10
README.md
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# thermatext
fancy name, QL-570 text formater
using gpt i got a shell script and then a python one. the python tries to detect letter width and maximise it to fit the label printer constraints (62mm width)
TDLR
`sudo brother_ql -b pyusb --model QL-570 -p usb://0x04f9:0x2028/000M12345678 print -l 62 logo.png`
TODO:
- use as printer
- fix missing font defentions fail to take into account letter width
- telegram bot (!)

33
text_to_image.sh Executable file
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#!/bin/bash
if [ -z "$1" ]; then
echo "Usage: $0 <text_string>"
exit 1
fi
text_string="$1"
filename="$(echo "$text_string" | tr ' ' '_').png"
# Set the desired image width and calculate the height
image_width=200
image_height=$((image_width / 4))
# Calculate the point size based on the length of the text string
point_size=$((image_width / ${#text_string} * 13 / 10))
echo "font_size ${point_size}"
# Set the desired font
font_file="/home/devdesk/.local/share/fonts/5x5_pixel.ttf"
convert -background white -fill black -font "$font_file" -pointsize "$point_size" \
-size "${image_width}x${image_height}" -gravity Center label:"$text_string" "$filename"
echo "PNG file created: $filename"
if [[ "$2" == "debug" ]]; then
echo "Debug mode detected, skipping print."
exit 0
fi
sudo brother_ql -b pyusb --model QL-570 -p usb://0x04f9:0x2028/000M6Z401370 --debug print -l 62 $filename

113
thermatext.py Executable file
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#!/usr/bin/env python3
import os
import sys
from PIL import Image, ImageDraw, ImageFont
import textwrap
MAX_FONT_SIZE = 15 # Maximum font size
WORD_SPACING = 10 # Word spacing in pixels
SIDE_SPACING = 3 # Space from image sides in pixels
TOP_BOTTOM_SPACING = 10 # Space from top and bottom of image in pixels
def calculate_font_size(text, image_size, font_path):
# Create a dummy image to get the text size
dummy_img = Image.new('RGB', (1, 1))
draw = ImageDraw.Draw(dummy_img)
# Start from a large font size
font_size = 200
font = ImageFont.truetype(font_path, font_size)
# Decrease the font size until the text fits the image width
while draw.textbbox((0, 0), text, font)[2] > image_size[0] - 2 * SIDE_SPACING:
font_size -= 1
font = ImageFont.truetype(font_path, font_size)
return font_size
def split_text(text, max_font_size, image_size, font_path):
# Wrap the text based on word spacing and /n
wrapper = WordSpacingTextWrapper(width=image_size[0], word_spacing=WORD_SPACING)
wrapped_text = []
for line in text.split('\n'):
lines = wrapper.wrap(line)
wrapped_text.extend(lines)
return wrapped_text
class WordSpacingTextWrapper(textwrap.TextWrapper):
def __init__(self, word_spacing=0, **kwargs):
super().__init__(**kwargs)
self.word_spacing = word_spacing
def _wrap_chunks(self, chunks):
# Add word spacing between chunks
chunks = super()._wrap_chunks(chunks)
lines = []
for i, line in enumerate(chunks):
if i < len(chunks) - 1:
line += ' ' * self.word_spacing
lines.append(line)
return lines
def main(text, debug=False):
image_width = 200
image_height = image_width // 4
image_size = (image_width, image_height)
font_path = "/home/devdesk/.local/share/fonts/5x5_pixel.ttf"
text_for_filename = text.replace(' ', '_').replace('/', '_').replace('\n', '')
filename = f"labels/{text_for_filename}.png"
font_size = calculate_font_size(text, image_size, font_path)
# Split the text into multiple lines if the font size is less than 20
if font_size < 20:
lines = split_text(text, 20, image_size, font_path)
# Recalculate the font size and image height with the split text
font_size = calculate_font_size('\n'.join(lines), image_size, font_path)
num_lines = len(lines)
line_height = font_size
line_spacing = line_height // 2 # Adjust line spacing as needed
image_height = line_height * num_lines + 2 * TOP_BOTTOM_SPACING + (num_lines - 1) * line_spacing
image_size = (image_width, image_height)
else:
lines = [text]
num_lines = 1
line_height = font_size
line_spacing = line_height // 2 # Adjust line spacing as needed
image_height = line_height + 2 * TOP_BOTTOM_SPACING
# Create the image
img = Image.new('RGB', image_size, color='white')
d = ImageDraw.Draw(img)
font = ImageFont.truetype(font_path, font_size)
# Draw the text for each line
y = TOP_BOTTOM_SPACING
for line in lines:
words = line.split(' ')
word_widths = [d.textbbox((0, 0), word, font)[2] - d.textbbox((0, 0), word, font)[0] for word in words]
total_width = sum(word_widths) + (WORD_SPACING * (len(words) - 1))
x = (image_width - total_width) // 2 + SIDE_SPACING
for i, word in enumerate(words):
d.text((x, y), word, fill='black', font=font)
x += word_widths[i] + WORD_SPACING
y += line_height + line_spacing
img.save(filename)
print(f"PNG file created: {filename}")
if not debug:
os.system(
f'sudo brother_ql -b pyusb --model QL-570 -p usb://0x04f9:0x2028/000M6Z401370 --debug print -l 62 {filename}'
)
if __name__ == "__main__":
if len(sys.argv) < 2:
print("Usage: ./text_to_image.py <text_string> [debug]")
sys.exit(1)
text = sys.argv[1].replace('\\n', '\n') # Add this line
debug = sys.argv[2] == 'debug' if len(sys.argv) > 2 else False
main(text, debug)