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Add script to generate pronoun role icons #33

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Merged
claremacrae merged 1 commit into from
Oct 6, 2021
Merged

Add script to generate pronoun role icons #33

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132 changes: 132 additions & 0 deletions scripts/gen_pronoun_icons.py
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#!/usr/bin/env python3

import cairosvg
from PIL import Image, ImageColor
import numpy as np
from pathlib import Path
import argparse


pronouns = {
"she/her": (None, "#37BE37"),
"he/him": (None, "#AFB602"),
"they/them": (None, "#00CECF"),
"ze/hir": (None, "#FFCDCD"),
"ze/zir": (None, "#FFCDCD"),
"xey/xem": (None, "#FFCDCD"),
"ae/aer": (None, "#FFCDCD"),
"e/em": (None, "#FFCDCD"),
"ey/em": (None, "#FFCDCD"),
"fae/faer": (None, "#FFCDCD"),
"fae/fem": (None, "#FFCDCD"),
"hu/hum": (None, "#FFCDCD"),
"it/its": (None, "#FFCDCD"),
"jee/jem": (None, "#FFCDCD"),
"kit/kits": (None, "#FFCDCD"),
"ne/nem": (None, "#FFCDCD"),
"peh/pehm": (None, "#FFCDCD"),
"per/per": (None, "#FFCDCD"),
"sie/hir": (None, "#FFCDCD"),
"se/sim": (None, "#FFCDCD"),
"she/hir": (None, "#FFCDCD"),
"si/hyr": (None, "#FFCDCD"),
"thon/thon": (None, "#FFCDCD"),
"ve/ver": (None, "#FFCDCD"),
"ve/vem": (None, "#FFCDCD"),
"vi/ver": (None, "#FFCDCD"),
"vi/vim": (None, "#AAFFAA"),
"xie/xer": (None, "#FFCDCD"),
"xe/xem": (None, "#FFCDCD"),
"yo/yo": (None, "#FFCDCD"),
"ze/mer": (None, "#FFCDCD"),
"zee/zed": (None, "#FFCDCD"),
"zie/zir": (None, "#FFCDCD"),
"zie/hir": (None, "#FFCDCD"),
"zme/zmyr": (None, "#FFCDCD"),
"zie/zem": (None, "#FFCDCD"),
"xe/xyr": (None, "#AAFFAA"),
"no pronouns": ("no/prns", "#AAFFAA"),
"any pronouns": ("any/prns", "#AAFFAA"),
"ze/zem": (None, "#FFCDCD"),
"xi/xir": (None, "#FFCDCD"),
"zhe/zhim": (None, "#FFCDCD")
}


def generate_svg(filename, text, width, height, color):
with open(filename, "wt") as file:
runs = text.upper().split('/')

max_len = max(map(len, runs))

font_size = (56 if max_len < 4 else 42 if max_len < 8 else 32) * (min(width, height) / 128)

file.write(f"""<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">
<svg width="{width}" height="{height}" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">""")

for y, text in enumerate(runs):
yo = (y + 1) / (len(runs) + 1) * 0.92 + y * 0.08 - 0.028
# ^^^^^^^^^^^^^^^^^^^^^^^^^
# fixup to account for weird baseline placement by CairoSVG
#
file.write(f"""
<text x="50%" y="{yo * height}" dominant-baseline="middle" text-anchor="middle" font-family="Segoe UI Black" font-size="{font_size}px" font-weight="bold" fill="{color}">{text}</text>""")

file.write("""
</svg>
""")


def read_png(file):
with Image.open(file) as img:
return np.asarray(img)

def write_png(file, pixels):
with Image.fromarray(pixels, 'RGBA') as img:
img.save(file)

def svg_to_png(dest, src, background):
with open(src, "rb") as in_file, open(dest, "wb") as out_file:
cairosvg.svg2png(write_to=out_file, file_obj=in_file)

# CairoSVG outputs transparent black for fully-transparent fills regardless
# of color. However, while it thus effectively produces premultiplied alpha
# for this one case, it produces unassociated alpha in all other cases.
# What we end up with are fringes with blurry dark spots around letters when
# the icons are downscaled to fit client DPI.
# Ideally, we'd just work with premultiplied alpha. However, Discord
# performs server-side image scaling in a way that expects unassociated
# alpha. Thus, there's not much we can do here other than make sure that we
# feed Discord what Discord demands.
# Since there seems to be no way to make CairoSVG be at least consistent
# about what it does, we simply overwrite the R, G, and B channels with the
# input color values (which is what should be in there anyways) and keep
# only the alpha channel (which is all we needed anyways).
#
pixels = read_png(dest)
pixels[:,:,:3] = ImageColor.getrgb(background)
write_png(dest, pixels)



def main(args):
this_dir = Path(__file__).parent.absolute()
output_dir = this_dir/"pronouns"

output_dir.mkdir(parents=True, exist_ok=True)

for pronoun, (text, color) in pronouns.items():
filename = f"{pronoun.translate({ord('/'): '_', ord(' '): '_'})}.svg"
svg_file = output_dir/filename
png_file = svg_file.with_suffix(".png")

generate_svg(svg_file, text if text else pronoun, args.width, args.height, color)
svg_to_png(png_file, svg_file, color)


if __name__ == "__main__":
args = argparse.ArgumentParser()
args.add_argument("-rx", "--res-x", default=128, type=int, dest="width", help="width of the generated icons (default: 128)")
args.add_argument("-ry", "--res-y", default=128, type=int, dest="height", help="height of the generated icons (default: 128)")
main(args.parse_args())