335676 - Text not rendered properly/at all when scrolling

Status: RESOLVED FIXED

(Core :: Graphics, defect)

Description

[Dennis Jacobfeuerborn]

User-Agent:       Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a1) Gecko/20060426 Minefield/3.0a1
Build Identifier: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a1) Gecko/20060426 Minefield/3.0a1

When visiting the menitioned URL and scrolling up and down the page text is not rendered at all or faulty. Selecting the blank areas blindly "reveals" most of the text but not 100% correctly.

Reproducible: Always

Steps to Reproduce:
1. Visit URL submitted with the bug
2. Scroll up and down the page a few times
Actual Results:  
Page does not get rendered properly.

Expected Results:  
Page should get rendered properly.

Comment 1

[Dennis Jacobfeuerborn]

Actually it gets worse. Apparently visiting the submitted URL has effects on sites you visit afterwards. Try this:

1. Visit http://eurogamer.net/
2. Browse around, the site should be displayed fine.
3. Visit the URL submitted with this bug.
4. Now visit http://eurogamer.net/ again
5. Browse around and notice that you now get similar rendering errors like on groklaw.net

Comment 2

[Hideo Oshima]

Confirmed.

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a1) Gecko/20060427 Firefox/3.0a1

Comment 3

[Andreas Schultz]

confirmed

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a1) Gecko/20060517 Minefield/3.0a1 ID:2006051704 [cairo]

Comment 4

[chris hofmann]

Still happening?  looks like it might be Linux only if it is.

Comment 5

[Dennis Jacobfeuerborn]

Yes, still happening.

Comment 6

[Andreas Schultz]

still happens on linux, X, Windows builds do not show this problem

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a1) Gecko/20060527 Minefield/3.0a1 ID:2006052704 [cairo]

Comment 7

[Asko Tontti]

Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a1) Gecko/20060619 Minefield/3.0a1

Visiting Groklaw and pressing page down causes

CAIRO ERROR: 1

messages to shell terminal.

According to Cairo's API documentation status code 1 is CAIRO_STATUS_NO_MEMORY.

Comment 8

[Asko Tontti]

The problem is in this line:

  2005 <b> ConsortiumInfo&#8203;.org <br>

If I remove HTML character entity 8203 the page works without problems.

Comment 9

[Pawel Chmielowski]

Attachment: v1

Skip another special glyph code in glyph drawing routine.

Comment 10

[Martijn Wargers (dead)]

Checking in gfxPangoFonts.cpp;
/cvsroot/mozilla/gfx/thebes/src/gfxPangoFonts.cpp,v  <--  gfxPangoFonts.cpp
new revision: 1.25; previous revision: 1.24
done

Checked in on trunk.