Save tool scripts like parse_font.py in a scripts dir

scripts/parse_font.py

@@ -0,0 +1,46 @@
+#!/usr/bin/env python3
+
+MAGIC = (0x72, 0xb5, 0x4a, 0x86)
+
+from collections import namedtuple
+PSF2 = namedtuple("PSF2", ["version", "offset", "flags", "count", "charsize", "height", "width"])
+
+def read_header(data):
+    from struct import unpack_from, calcsize
+
+    fmt = "BBBBIIIIIII"
+
+    values = unpack_from(fmt, data)
+    if values[:len(MAGIC)] != MAGIC:
+        raise Exception("Bad magic number in header")
+
+    return PSF2(*values[len(MAGIC):])
+
+
+def print_glyph(header, data):
+    bw = (header.width + 7) // 8
+    fmt = "{:08b}" * bw
+    for y in range(header.height):
+        b = data[y*bw:(y+1)*bw]
+        s = fmt.format(*b).replace("0", " ").replace("1", "*")
+        print(s)
+    print("")
+
+
+def display_font(filename):
+    data = open(filename, 'rb').read()
+
+    header = read_header(data)
+    print(header)
+
+    c = header.charsize
+    for i in range(0, header.count):
+        n = i * c + header.offset
+        print("Glyph {}:".format(i))
+        print_glyph(header, data[n:n+c])
+
+
+if __name__ == "__main__":
+    import sys
+    for filename in sys.argv[1:]:
+        display_font(filename)