Generate Chinese font for waveshare-epd

crop-blue30.py

from PIL import Image, ImageDraw, ImageFont, ImageFilter

im = Image.open("./blue30.png")

POS = (1, 4)

X = POS[0] * 80
Y = POS[1] * 80

im1 = im.crop((X, Y, X + 30, Y + 30))


for y in range(im1.size[1]):
    for x in range(im1.size[0]):

        pix = r, g, b, a = im1.getpixel((x, y))
        r = (255 * (255 - a) + r * a) // 255
        g = (255 * (255 - a) + g * a) // 255
        b = (255 * (255 - a) + b * a) // 255
        a = 255

        im1.putpixel((x, y), (r, g, b, a))
        print(pix, r)


im1.show()

im1 = im1.resize((64, 64), Image.LANCZOS)
im1 = im1.filter(ImageFilter.SHARPEN)
im1 = im1.convert('1', dither=Image.NONE)

# im1 = im1.convert('1', dither=Image.FLOYDSTEINBERG)
# im1.show()
# im1.save('./test.bmp')


buf = []

# NOTE: can only handle 8-bit boudary
for y in range(im1.size[1]):
    for x in range(im1.size[0]):
        if x % 8 == 0:
            buf.append(0)

        bit = int(im1.getpixel((x, y)) != 0)
        buf[-1] = (buf[-1] << 1) | bit


print(buf)
print(len(buf))

with open('raw-img.bin', 'wb') as fp:
    fp.write(bytes(buf))

font-epd.py

from PIL import Image, ImageDraw, ImageFont
import PIL.features

# brew install libraqm
# cmdprint('libraqm:', PIL.features.check('raqm'))


size = (320, 16)

"""
FORMAT = "RGB"
BG = (255, 255, 255)
FG = (0, 0, 0)
"""

FORMAT = '1'
BG = 0
FG = 1

YOFF = -1  # or -1


CHARS = "卧槽可以了！你好世界你全心全力做到的最好可能还不如别人的随便搞搞最怕你一生碌碌无为，还安慰自己平凡可贵。"
CHARS = ''.join(list(set(CHARS)))


im = Image.new(FORMAT, size, BG)

# font = ImageFont.truetype("sarasa-mono-sc-nerd-light.ttf", size=16, index=0)
font = ImageFont.truetype("sarasa-mono-sc-nerd-regular.ttf", size=16, index=0)
# font = ImageFont.truetype("Unibit.ttf", size=16, index=0)
# font = ImageFont.truetype("zpix.ttf", size=12, index=0)


draw = ImageDraw.Draw(im)

draw.text((0, YOFF), CHARS, font=font, fill=FG, language='zh-CN')
im.save('font.png')
im.show()


draw.rectangle([(0, 0), size], fill=BG)

charmap = []
for i, c in enumerate(CHARS):
    charmap = []
    draw.text((0, YOFF), c, font=font, fill=FG)

    for y in range(16):
        v = 0
        for x in range(0, 16):
            b = im.getpixel((x, y))
            v = (v << 1) + b

        charmap.append(v >> 8)
        charmap.append(v & 0xFF)

    draw.rectangle([(0, 0), size], fill=BG)
    print("{", end='')
    print('"{}", {}'.format(c,
        ', '.join(map(lambda c: "0x%02x" % c, charmap))
    ), end="")
    print("},")

raw2c.py

import sys


sys.stdin = sys.stdin.detach() # convert to binary stream
#sys.stdout = sys.stdout.detach()

raw = sys.stdin.read()


print( ', '.join(map(lambda c: "0x%02x" % c, raw)))

#print( ''.join(map(lambda c: bin(256 + c)[3:], raw)))

# sys.stdout.write(raw[0x3a:])