295862 - tamil font not used as specced in CSS

Status: RESOLVED INVALID

(Firefox :: General, defect)

Description

[Maha]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0

I am using Mozilla firefox to view this website www.kaumaram.com. The website
has a stylesheet(http://kaumaram.com/kaumaram1.css) which uses both Tamil font
mylaiplain.ttf and english fonts. The tamil fonts in this website are not
displayed properly. When I force mozilla to use the tamil fonts by selecting it
and clicking "Use my fonts" in the preferences window, the entire page is
displayed in the tamil font as against the part of the page that is meant to be
in tamil. I have pasted the style file for your reference:

/* body background & text color */
body {background-color: #000066} 

a:link {color: #faebd7; text-decoration: none}
a:visited {color: #ffff99; text-decoration: none}
a:hover {color: #33ffff; text-decoration: none}
a:active {color: #faebd7; text-decoration: none}

p.english {font-family: Verdana, Arial, serif; color: #ccffcc; font-size: 14px;
text-align: left}
p.english-big {font-family: arial, serif; color: #00ffcc; font-size: 16px;
text-align: left}
p.tamil {font-family: MylaiPlain, serif; color: #ccffcc; font-size: 16px;
text-align: left}
p.tamila {font-family: MylaiPlain, serif; color: #ccffcc; font-size: 22px;
text-align: left;}
p.tamil-big {font-family: MylaiPlain, serif; color: #00ffcc; font-size: 18px;
text-align: center}
p.tamil_big {font-family: MylaiPlain, serif; color: #00ffcc; font-size: 23px;
text-align: center}
p.english-c {font-family: Verdana, serif; color: #ccffcc; font-size: 18px;
text-align: center}
p.english-big-c {font-family: arial, serif; color: #00ffcc; font-size: 20px;
text-align: center}
p.tamil-c {font-family: MylaiPlain, serif; color: #ffff00; font-size: 18px;
text-align: right}
p.tamil-big-c {font-family: MylaiPlain, serif; color: #ffff00; font-size: 25px;
text-align: right}
div.tamil {font-family: MylaiPlain, serif; color: #ccffcc; font-size: 16px;}

img.top {vertical-align:text-top}
img.bottom {vertical-align:text-bottom}
img.left {text-align: left}
img.right {text-align: right}


/* font inside table */
TD.red {color:red }
TD.mylai1 {font-family: MylaiPlain, serif; font-size:18px}

The fonts specified in this stylesheet are not used when displaying the webpage.
Thanks a lot for this bug reporting and fixing service. It is greatly appreciated.

Reproducible: Always

Steps to Reproduce:
1. visit www.kaumaram.com
2. Download and install Mylaiplain.ttf font from the site
3. Change font to Mylaiplain in the prefeneces tab (alternative attempt)
3.

Actual Results:  
The sections of the page that have to be displayed in the tamil font were
displayed in english font. When the font is changed to Mylaiplain in the
preferences tab, the whole page is displayed in the same font. In other words,
teh fonts specified in the stylesheet are not used.

Expected Results:  
Dislpayed the sections of the page in the appropriate fonts

Comment 1

[Oliver Klee]

*** Bug 295863 has been marked as a duplicate of this bug. ***

Comment 2

[Josh Birnbaum]

As far as I can tell, the CSS is not referenced.  The page uses <FONT
FACE=MylaiPlain> to change the font.

That said, for some reason the browser doesn't like the font.  I experimented
with putting the page into quirks mode and changing the font specified, and that
worked.  So my current hypothesis is that the information saved into the font
file is wrong.  Anyone know how to tell?

Comment 3

[Simon Montagu :smontagu]

You are right. The font is a "masquerade font" which contains Tamil glyphs for
ASCII characters instead of using the correct Unicode code points. This kind of
font is only supported in quirks mode.

Comment 4

[Uri Bernstein]

(In reply to comment #3)
> The font is a "masquerade font" which contains Tamil glyphs for
> ASCII characters instead of using the correct Unicode code points. This kind of
> font is only supported in quirks mode.

Just curious - how does the system know that this is a "masquerade font" - and
not just a font with very fancy glyphs for ASCII characters?

Comment 5

[Simon Montagu :smontagu]

> how does the system know that this is a "masquerade font" - and
> not just a font with very fancy glyphs for ASCII characters?

For True Type fonts, from the Encoding ID in the CMAP table. See
http://partners.adobe.com/public/developer/opentype/index_cmap.html and bug 195038.