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#!/usr/bin/env python3
"""
Generate a sample rendering of the base font.
"""
from PIL import Image, ImageColor, ImageDraw, ImageFont
SAMPLE_TEXT = (
"ABCDEFHIJKLMNOP1234567890abcdefghijklmnop\"'$#!@{}[]()<>çéáÁÑÃÏ¡²³¤€¼½¾¥×"
"÷ßø«»®␀␍␊␌▶⚓⯒✘✔✼✎␢…⌘⏎⌫⏻⏼➜●ЯЖ"
)
CONFUSABLES = "bh 5S HX 6G AR kx gy gq Z2 Il 1l 1I OQ CG DO 0O"
LINE_COLOR = ImageColor.getrgb("#88f")
TEXT_COLOR = ImageColor.getrgb("black")
FONT_FILES = (
"./build/3270-Regular.ttf",
"./build/3270-Regular.otf",
"./build/3270-Regular.woff",
"./build/3270SemiCondensed-Regular.ttf",
"./build/3270SemiCondensed-Regular.otf",
"./build/3270SemiCondensed-Regular.woff",
"./build/3270Condensed-Regular.ttf",
"./build/3270Condensed-Regular.otf",
"./build/3270Condensed-Regular.woff",
)
def draw_sample(font_file):
HEIGHT = 500
WIDTH = 800
background = Image.new("RGBA", (WIDTH, HEIGHT), ImageColor.getrgb("white"))
foreground = Image.new("RGBA", (WIDTH, HEIGHT), (255, 255, 255, 0))
draw_b = ImageDraw.Draw(background)
draw_f = ImageDraw.Draw(foreground)
label_font = ImageFont.truetype(font_file, size=15)
y = 0
for size in range(15, 55, 5):
sample_font = ImageFont.truetype(font_file, size=size)
offset = size * 0.7
y += offset
# Draw the background reference lines. Upper for the alpha ascender
draw_b.line(
((0, y + size * 0.2), (WIDTH, y + size * 0.2)), LINE_COLOR, 1
)
# Lower line for the baseline
draw_b.line(((0, y + offset), (WIDTH, y + offset)), LINE_COLOR, 1)
# Draw the point size we are using for the text.
draw_f.text((0, y), str(size), TEXT_COLOR, font=label_font)
# Draw the text itself
draw_f.text((20, y), SAMPLE_TEXT, TEXT_COLOR, font=sample_font)
draw_f.text((20, 480), font_file, TEXT_COLOR, font=label_font)
return Image.alpha_composite(background, foreground)
def draw_readability_test(font_file, factor):
sample_font = ImageFont.truetype(font_file, size=30)
img = Image.new("RGB", (800, 35), ImageColor.getrgb("white"))
draw = ImageDraw.Draw(img)
draw.text(
(25, 5),
CONFUSABLES,
TEXT_COLOR,
font=sample_font,
)
img = img.resize((800 // factor, 35 // factor))
img = img.resize((800, 35), Image.Dither.NONE)
return img
if __name__ == "__main__":
samples = []
for font in FONT_FILES:
sample = draw_sample(font)
for factor in range(1, 6):
rt = draw_readability_test(font, factor)
sample.paste(rt, (0, 250 + 35 * factor))
samples.append(sample)
sample.save(
"build/3270_sample.gif",
format="GIF",
append_images=samples,
save_all=True,
duration=500,
loop=0,
)
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