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devdesk
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README.md
12
README.md
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# thermatext
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fancy name, QL-570 text formater
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fancy name, QL-570 text formater
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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)
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TDLR
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`sudo brother_ql -b pyusb --model QL-570 -p usb://0x04f9:0x2028/000M12345678 print -l 62 logo.png`
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TODO:
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- use as printer
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- fix missing font defentions fail to take into account letter width
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- telegram bot (!)
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#!/bin/bash
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if [ -z "$1" ]; then
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echo "Usage: $0 <text_string>"
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exit 1
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fi
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text_string="$1"
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filename="$(echo "$text_string" | tr ' ' '_').png"
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# Set the desired image width and calculate the height
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image_width=200
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image_height=$((image_width / 4))
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# Calculate the point size based on the length of the text string
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point_size=$((image_width / ${#text_string} * 13 / 10))
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echo "font_size ${point_size}"
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# Set the desired font
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font_file="/home/devdesk/.local/share/fonts/5x5_pixel.ttf"
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convert -background white -fill black -font "$font_file" -pointsize "$point_size" \
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-size "${image_width}x${image_height}" -gravity Center label:"$text_string" "$filename"
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echo "PNG file created: $filename"
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if [[ "$2" == "debug" ]]; then
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echo "Debug mode detected, skipping print."
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exit 0
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fi
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sudo brother_ql -b pyusb --model QL-570 -p usb://0x04f9:0x2028/000M6Z401370 --debug print -l 62 $filename
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#!/usr/bin/env python3
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import os
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import sys
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from PIL import Image, ImageDraw, ImageFont
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import textwrap
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MAX_FONT_SIZE = 15 # Maximum font size
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WORD_SPACING = 10 # Word spacing in pixels
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SIDE_SPACING = 3 # Space from image sides in pixels
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TOP_BOTTOM_SPACING = 10 # Space from top and bottom of image in pixels
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def calculate_font_size(text, image_size, font_path):
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# Create a dummy image to get the text size
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dummy_img = Image.new('RGB', (1, 1))
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draw = ImageDraw.Draw(dummy_img)
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# Start from a large font size
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font_size = 200
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font = ImageFont.truetype(font_path, font_size)
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# Decrease the font size until the text fits the image width
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while draw.textbbox((0, 0), text, font)[2] > image_size[0] - 2 * SIDE_SPACING:
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font_size -= 1
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font = ImageFont.truetype(font_path, font_size)
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return font_size
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def split_text(text, max_font_size, image_size, font_path):
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# Wrap the text based on word spacing and /n
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wrapper = WordSpacingTextWrapper(width=image_size[0], word_spacing=WORD_SPACING)
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wrapped_text = []
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for line in text.split('\n'):
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lines = wrapper.wrap(line)
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wrapped_text.extend(lines)
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return wrapped_text
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class WordSpacingTextWrapper(textwrap.TextWrapper):
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def __init__(self, word_spacing=0, **kwargs):
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super().__init__(**kwargs)
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self.word_spacing = word_spacing
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def _wrap_chunks(self, chunks):
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# Add word spacing between chunks
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chunks = super()._wrap_chunks(chunks)
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lines = []
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for i, line in enumerate(chunks):
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if i < len(chunks) - 1:
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line += ' ' * self.word_spacing
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lines.append(line)
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return lines
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def main(text, debug=False):
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image_width = 200
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image_height = image_width // 4
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image_size = (image_width, image_height)
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font_path = "/home/devdesk/.local/share/fonts/5x5_pixel.ttf"
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text_for_filename = text.replace(' ', '_').replace('/', '_').replace('\n', '')
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filename = f"labels/{text_for_filename}.png"
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font_size = calculate_font_size(text, image_size, font_path)
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# Split the text into multiple lines if the font size is less than 20
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if font_size < 20:
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lines = split_text(text, 20, image_size, font_path)
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# Recalculate the font size and image height with the split text
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font_size = calculate_font_size('\n'.join(lines), image_size, font_path)
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num_lines = len(lines)
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line_height = font_size
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line_spacing = line_height // 2 # Adjust line spacing as needed
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image_height = line_height * num_lines + 2 * TOP_BOTTOM_SPACING + (num_lines - 1) * line_spacing
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image_size = (image_width, image_height)
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else:
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lines = [text]
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num_lines = 1
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line_height = font_size
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line_spacing = line_height // 2 # Adjust line spacing as needed
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image_height = line_height + 2 * TOP_BOTTOM_SPACING
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# Create the image
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img = Image.new('RGB', image_size, color='white')
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d = ImageDraw.Draw(img)
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font = ImageFont.truetype(font_path, font_size)
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# Draw the text for each line
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y = TOP_BOTTOM_SPACING
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for line in lines:
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words = line.split(' ')
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word_widths = [d.textbbox((0, 0), word, font)[2] - d.textbbox((0, 0), word, font)[0] for word in words]
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total_width = sum(word_widths) + (WORD_SPACING * (len(words) - 1))
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x = (image_width - total_width) // 2 + SIDE_SPACING
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for i, word in enumerate(words):
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d.text((x, y), word, fill='black', font=font)
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x += word_widths[i] + WORD_SPACING
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y += line_height + line_spacing
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img.save(filename)
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print(f"PNG file created: {filename}")
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if not debug:
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os.system(
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f'sudo brother_ql -b pyusb --model QL-570 -p usb://0x04f9:0x2028/000M6Z401370 --debug print -l 62 {filename}'
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)
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if __name__ == "__main__":
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if len(sys.argv) < 2:
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print("Usage: ./text_to_image.py <text_string> [debug]")
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sys.exit(1)
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text = sys.argv[1].replace('\\n', '\n') # Add this line
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debug = sys.argv[2] == 'debug' if len(sys.argv) > 2 else False
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main(text, debug)
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