I've installed captcha on my W/XP French workstation, and pointed it to the Windows fonts directory. The resulting admin > settings gives this:

Number of fonts found: 88
GD Version: bundled (2.0.15 compatible)
FreeType Support: True

This solves the problem I have just submitted, of characters being illegible.

I then come up with a serious usability problem: very frequently, the "word" displayed includes "undisplayable" characters, which are expressed as a little box. Needless to say, it is impossible to type these in (because it's impossible to tell what they are).
I suspect that this is a problem of interpreting special characters such as "é" or "ç" - could there be an attempt to display Unicode characters from Windows TT fonts via ANSI calls?

Comments

arnabdotorg’s picture

arnabdotorg commented

From captcha.module, _captcha_code():

$consts='bcdgjxvmnprst';
$vowels='aeiou';

This means that the module only tries to write codes using the letters "bcdgjxvmnprst" and "aeiou". I'm not sure how box characters arise, unless you have fonts which cannot draw these.

Also, 88 fonts is a little too extreme, both in terms of usability and performance, don't you think?

joel_guesclin’s picture

joel_guesclin commented

I think I have sorted out my problem - anyway I've got it working (and only one font!). I've posted here.

Anonymous’s picture

(not verified) commented
arnabdotorg’s picture

arnabdotorg commented
Version: » 4.6.x-1.x-dev
Status: Fixed » Closed (fixed)