Font File Loaded From Temp File Seems Incorrect

for key in fnt.keys(): str1 = base64.b64decode(fnt[key]) strA = XOR(str1, coder) temp = tempfile.TemporaryFile() temp.seek(0) temp.write(strA) temp.seek(0

Solution 1:

When temp is closed it is destroyed, so you won't be able to read from it to extract the font data.

On what line of your code do you get the RuntimeError: Can't seek in stream error message? As Michael Petch said, we need to know your OS. tempfile.TemporaryFile() is certainly seekable on Linux.

BTW, in

if key == "calibrib.ttf":
    FONTB = temp
    temp.close()

The temp.close() is inside the if block. I guess that might just be a copy & paste error. But as I said above, you don't want to close these files until you've read from them.

Presumably, your original font reading function opens the font files from disk with the filenames and then accesses the font data using the file handle from open(). So as Michael Petch said, you need to change that to accept handles from files that are already open.

EDIT

I got confused earlier when you said that "There is NO other font reading function", since I couldn't figure out what you were actually trying to do with the decrypted font data.

And I guess I also got confused by you calling your font extraction function main(), since main() is conventionally used as the entry-point into a program, so a program normally doesn't run a bunch of different main() functions in different modules.

Anyway...

I've never used pygame, but from a quick look at the docs you can give pygame.font.Font() either a font name string or an open font filehandle as the first arg, eg

myfont = pygame.font.Font(font_filehandle, size)

Presumably your fnt module has a dict containing two strings of base64 encoded, XOR-encrypted font data, keyed by the font names, "calibrib.ttf".

So this should work, assuming I'm not misunderstanding that pygame doc. :)

Warning: Untested code

def xor_str(message, key):
    return ''.join([chr(ord(c)^ord(k)) for c,k in izip(message, cycle(key))])

def decode_fonts(fnt):
    coder = "PHdzDER+@k7pcm!LX8gufh=y9A^UaMsn-oW6"

    font_fh = {}
    for key in fnt.keys():
        xorfont = base64.b64decode(fnt[key])

        temp = tempfile.TemporaryFile()
        temp.write(xor_str(xorfont, coder))
        temp.seek(0)

        font_fh[key] = temp
    return font_fh

#...............

    #In your pygame function:
    font_fh = decode_fonts(fnt)

    font_obj = {}
    for key in font_fh.keys():
        font_obj[key] = pygame.font.Font(font_fh[key], point_size)

    #Now you can do
    surface = font_obj["calibri.ttf"].render(text, antialias, color, background=None)