bdfparse/bdfparse.py

import numpy as np
import matplotlib.pyplot as plt


def parse_properties(bdfFile):

    properties = {"COMMENT": []}
    with open(bdfFile, "r") as bdf:
        line = bdf.readline()

        while not line.startswith("STARTCHAR"):

            if line.startswith("COMMENT"):
                properties["COMMENT"].append(
                    line.replace("COMMENT", "").replace("\n", "")
                )

            if line.startswith("FONT"):
                properties["FONT"] = line.replace("FONT", "").replace("\n", "")

            if line.startswith("SIZE"):
                properties["SIZE"] = line.replace("SIZE", "").replace("\n", "")

            if line.startswith("FONTBOUNDINGBOX"):
                properties["FONTBOUNDINGBOX"] = [
                    int(x)
                    for x in (
                        line.replace("FONTBOUNDINGBOX ", "").replace("\n", "").split()
                    )
                ]

            if line.startswith("STARTPROPERTIES"):
                properties["STARTPROPERTIES"] = line.replace(
                    "STARTPROPERTIES", ""
                ).replace("\n", "")

            if line.startswith("FONTNAME_REGISTRY"):
                properties["FONTNAME_REGISTRY"] = line.replace(
                    "FONTNAME_REGISTRY", ""
                ).replace("\n", "")

            if line.startswith("FOUNDRY"):
                properties["FOUNDRY"] = line.replace("FOUNDRY", "").replace("\n", "")

            if line.startswith("FAMILY_NAME"):
                properties["FAMILY_NAME"] = line.replace("FAMILY_NAME", "").replace(
                    "\n", ""
                )

            if line.startswith("WEIGHT_NAME"):
                properties["WEIGHT_NAME"] = line.replace("WEIGHT_NAME", "").replace(
                    "\n", ""
                )

            if line.startswith("SLANT"):
                properties["SLANT"] = line.replace("SLANT", "").replace("\n", "")

            if line.startswith("SETWIDTH_NAME"):
                properties["SETWIDTH_NAME"] = line.replace("SETWIDTH_NAME", "").replace(
                    "\n", ""
                )

            if line.startswith("ADD_STYLE_NAME"):
                properties["ADD_STYLE_NAME"] = line.replace(
                    "ADD_STYLE_NAME", ""
                ).replace("\n", "")

            if line.startswith("PIXEL_SIZE"):
                properties["PIXEL_SIZE"] = line.replace("PIXEL_SIZE", "").replace(
                    "\n", ""
                )

            if line.startswith("POINT_SIZE"):
                properties["POINT_SIZE"] = line.replace("POINT_SIZE", "").replace(
                    "\n", ""
                )

            if line.startswith("RESOLUTION_X"):
                properties["RESOLUTION_X"] = line.replace("RESOLUTION_X", "").replace(
                    "\n", ""
                )

            if line.startswith("RESOLUTION_Y"):
                properties["RESOLUTION_Y"] = line.replace("RESOLUTION_Y", "").replace(
                    "\n", ""
                )

            if line.startswith("SPACING"):
                properties["SPACING"] = line.replace("SPACING", "").replace("\n", "")

            if line.startswith("AVERAGE_WIDTH"):
                properties["AVERAGE_WIDTH"] = line.replace("AVERAGE_WIDTH", "").replace(
                    "\n", ""
                )

            if line.startswith("CHARSET_REGISTRY"):
                properties["CHARSET_REGISTRY"] = line.replace(
                    "CHARSET_REGISTRY", ""
                ).replace("\n", "")

            if line.startswith("CHARSET_ENCODING"):
                properties["CHARSET_ENCODING"] = line.replace(
                    "CHARSET_ENCODING", ""
                ).replace("\n", "")

            if line.startswith("DEFAULT_CHAR"):
                properties["DEFAULT_CHAR"] = line.replace("DEFAULT_CHAR", "").replace(
                    "\n", ""
                )

            if line.startswith("FONT_DESCENT"):
                properties["FONT_DESCENT"] = line.replace("FONT_DESCENT", "").replace(
                    "\n", ""
                )

            if line.startswith("FONT_ASCENT"):
                properties["FONT_ASCENT"] = line.replace("FONT_ASCENT", "").replace(
                    "\n", ""
                )

            if line.startswith("COPYRIGHT"):
                properties["COPYRIGHT"] = line.replace("COPYRIGHT", "").replace(
                    "\n", ""
                )

            if line.startswith("CAP_HEIGHT"):
                properties["CAP_HEIGHT"] = line.replace("CAP_HEIGHT", "").replace(
                    "\n", ""
                )

            if line.startswith("X_HEIGHT"):
                properties["X_HEIGHT"] = line.replace("X_HEIGHT", "").replace("\n", "")

            if line.startswith("_GBDFED_INFO"):
                properties["_GBDFED_INFO"] = line.replace("_GBDFED_INFO", "").replace(
                    "\n", ""
                )

            line = bdf.readline()
    return properties


def from_hex(values, columns):
    return np.array(
        [list(f"{int(row[:2], 16):0>{columns}b}") for row in values.split("\n")],
        dtype=int,
    )


def parse_chars(bdfFile):
    font = {}
    props = parse_properties(bdfFile)
    cols = props["FONTBOUNDINGBOX"][0]
    rows = props["FONTBOUNDINGBOX"][1]

    with open(bdfFile, "r") as bdf:
        line = bdf.readline()

        # Go through file until chars start.
        while not line.startswith("CHARS "):
            line = bdf.readline()
        characters = int(line.split(" ")[1])

        for character in range(characters):
            line = bdf.readline()
            char = line.split(" ")[1].replace("\n", "")

            while not line.startswith("BITMAP"):
                line = bdf.readline()

            bits = ""
            for row in range(rows):

                bits += bdf.readline()
            font[char] = from_hex(bits.strip(), cols)

            if bdf.readline().startswith("ENDFONT"):
                return font
    return font