341030 - Adjacent ASCII characters rendered at different sizes

Status: RESOLVED WORKSFORME

(Core :: Graphics, defect, P4)

Description

[Boris Zbarsky [:bzbarsky]]

BUILD: 2005-06-01-08 trunk nightly

STEPS TO REPRODUCE (in SeaMonkey, but I bet I could try to set equivalent font prefs in Firefox):
1)  Install Fedora Core 4 with a bunch of fonts
2)  Set default Proportinal font to "Serif" at 16px
3)  Set default Serif font to "serif"
4)  Set default Sans-serif font to "sans-serif"
5)  Set default Monospace font to "Courier" at 14px
6)  Set minimum font size to 14px
7)  Load https://bugzilla.mozilla.org/attachment.cgi?bugid=340019&action=enter
8)  Type "Updated to comments" in the attachment description textfield (the one
    right below the file upload control).

EXPECTED RESULTS: text renders at the same size

ACTUAL RESULTS: Text looks almost camel-cased.  I'll post a screenshot.

Comment 1

[Boris Zbarsky [:bzbarsky]]

Attachment: Screenshot

Note that the "Browse" button has a similar issue...

Comment 2

[Christian :Biesinger (don't email me, ping me on IRC)]

I've seen basically the same behaviour in a non-cairo non-pango build too, although not in textboxes (usually I see it on devmo^WMDC articles)

Comment 3

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

Hm, I can't reproduce this with those font settings, ubuntu feisty.  The text comes out all the same size.

Comment 4

[Boris Zbarsky [:bzbarsky]]

Those are generic font settings.  So the exact fonts they actually map to will likely depend strongly on your distribution.  I'd be happy to tell you what fonts those are in this case if I knew how to get that information.

Comment 5

[Karl Tomlinson (:karlt)]

I think we need to wait for more info from Boris on this.

A log with FC_DEBUG=1 in the environment would give useful info on the actual fonts used.

Comment 6

[Mike Connor [:mconnor]]

punting remaining a6 bugs to b1, all of these shipped in a5, so we're at least no worse off by doing so.

Comment 7

[Boris Zbarsky [:bzbarsky]]

Attachment: Log of steps in comment 0

Though note that in this case the bug did _not_ appear.  In current builds it seems to be random: sometimes it appears, sometimes not.  On the same content.

Comment 8

[Karl Tomlinson (:karlt)]

Looks like "Luxi Sans" is the (Type 1) font involved, hintstyle full, rgba none.

Do you have a freetype older than 2.1.10?
I wonder if this could be due to

http://savannah.nongnu.org/bugs/?12263

Comment 9

[Boris Zbarsky [:bzbarsky]]

> Do you have a freetype older than 2.1.10?

Yes.  freetype-2.1.9-2 according to rpm -q.

And yes, I can see how that bug could cause this problem if some of the glyphs are coming from one font size and others from a different font size.

Comment 10

[Boris Zbarsky [:bzbarsky]]

For what it's worth, I haven't seen this in a while.  But we've mucked about with default font stuff, I believe, so I may no longer be using the same fonts...

Comment 11

[Stuart Parmenter]

freetype 2.2.10 is our refplatform requirement and we can't reproduce this anymore... going to drop this off the list unless someone else can reproduce it.. marking WFM/invalid/fixed