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maia arson crimew 2022-04-26 21:31:57 +02:00
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# shirtgen - a maiacore t-shirt design generator
How to use:
* write a shirtfile (see example.shirt for an example and the comments in gen.py for a documentation of the format)
* run `gen.py <shirtfile>` to generate a png
## Example
shirtfile:
```
m:b:fill FIRST
m:r:fill second line
r:r:400 third line
```
output:
![three lines of text, the first one is really big and says "first", the second line is smaller and says "second line" a third, even smaller line says "third line"](example.png)

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m:b:fill FIRST
m:r:fill second line
r:r:400 third line

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from PIL import Image, ImageDraw, ImageFont
import sys
# fonts are defined here
fonts = {
"r": "fonts/F25_Bank_Printer.ttf",
"b": "fonts/F25_Bank_Printer_Bold.ttf",
}
if len(sys.argv) == 1:
print("please specify a path to a shirtfile")
exit(1)
# parse shirtfile into list of tuples
#
# shirtfile syntax:
# a shirtfile is a plain-text file made up of lines in the following format
# {alignment}:{font}:{size} {text}
# where:
# - alignment can be:
# * 'm' for centered text
# * 'l' for left aligned text
# * 'r' for right aligned text
# - font can be one of the configured fonts above, included per default are:
# * 'r' for F25 Bank Printer (regular)
# * 'b' for F25 Bank Printer Bold
# - size is either 'fill' to automatically calculate a font size to fill the width of the canvas
# or a font size in pixels
# - text is your desired line of text (with no line breaks)
# the shirtfile parser treats lines starting with # as comments and ignores empty lines
#
texts = []
with open(sys.argv[1], "r") as f:
lines = f.readlines()
for line in lines:
# skip comments and empyt lines
if line.startswith("#") or len(line.strip()) == 0:
continue
parts = line.strip().split(" ", 1)
texts.append(tuple(parts[0].split(":")) + (parts[1],))
# create transparent 5000x5000 image
im = Image.new("RGBA", (5000, 5000), (0, 0, 0, 0))
# quick maths
# calculate appropriate text sizes and bounding box sizes for positioning later
p_texts = []
total_height = 0
for text in texts:
font_size = 50
font_path = fonts[text[1]]
bbox_size = (0, 0)
font = None
if text[2] == "fill":
# dynamic font size calc is hell
# reload font at increasing size until we fill out the whole canvas width
while bbox_size[0] < (im.size[0] - 5):
font = ImageFont.truetype(font_path, font_size)
bbox = font.getbbox(text[3], anchor=f"{text[0]}b")
bbox_size = (bbox[2] - bbox[0], bbox[3] - bbox[1])
font_size += 5
else:
# load font for configured size and do bbox calculation
font_size = int(text[2])
font = ImageFont.truetype(font_path, font_size)
bbox = font.getbbox(text[3], anchor=f"{text[0]}b")
bbox_size = (bbox[2] - bbox[0], bbox[3] - bbox[1])
print(f"selected font size {font_size}")
total_height += bbox[1]
p_texts.append(text + (font, bbox_size))
# account for padding
total_height += (len(texts) - 1) * 20
# draw the text
draw = ImageDraw.Draw(im)
y_offset = 0
for text in p_texts:
# set x location dependent on alignment
loc_x = 0
if text[0] == "m":
loc_x = (im.size[0]/2)
elif text[0] == "r":
loc_x = im.size[0]
# calculate y location based on total height of all text + current line height to
# center all text together in the center of the canvas
loc_y = (im.size[1]/2 + total_height / 2) + text[5][1] + y_offset
draw.text((loc_x, loc_y), text[3], font=text[4], anchor=f"{text[0]}b")
# add height of this line to offset
y_offset += text[5][1] + 20
# crop to content and save
im = im.crop(im.getbbox())
filename = sys.argv[1].removesuffix(".shirt")
im.save(f"{filename}.png", 'PNG')