Bug 106

Summary:

Garbage ouput on mixed AA/non-AA text on the same line

Product:

xorg

Reporter:

Frederic Crozat <fcrozat>

Component:

Lib/Xft

Assignee:

Keith Packard <keithp>

Status:

CLOSED INVALID

QA Contact:

Severity:

major

Priority:

high

Version:

unspecified

Hardware:

x86 (IA32)

OS:

Linux (All)

Whiteboard:

i915 platform:

i915 features:

Attachments:

Description	Flags
Patch for fix the bug with Xft 2.0	none

Description Frederic Crozat 2003-08-19 07:26:01 UTC

This bug is a follow-up of an old Xft 2.0 bug which was fixed by keith 6 months
ago (I'll attached the fix patch) but which has reappear when switching to Xft
2.1. Patch is no longer applicable (partially merged), so I guess some part of
it are missing.

In Mozilla GTK2, if you try to display web pages containing both AA and non-AA
glyphs on the same line (usually, when displaying Japanese, Korean or Chinese
pages, with only unscalable fonts), non-AA glyphs are output as garbage. 

For what I recall from irc discussion with keith, it was a bug in Xft which was
fixed by the attached patch... Unfortunately, it is back with Xft 2.1.

Comment 1 Frederic Crozat 2003-08-19 07:36:18 UTC

Created attachment 51 [details] [review]
Patch for fix the bug with Xft 2.0

Comment 2 Frederic Crozat 2003-08-28 06:16:16 UTC

Test page for mozilla/xft :

http://www.uue.org/~mr/japtest.html

Comment 3 Frederic Crozat 2003-09-05 09:47:56 UTC

I've tried to dig further for this bug (in fact, I was able to apply the format
= 0  and if (!format || format->|| font->format->depth > format->depth) ormat =
 font->format;) stuff.

It fixed the garbare but it also changed glyphs rendering (hinting mainly)..

I'm not sure it is the right fix to use..

Any idea ?

Comment 4 Frederic Crozat 2003-09-10 07:45:08 UTC

Sorry, my latest comment is incorrect, it doesn't fix glyph corruption..

Comment 5 Frederic Crozat 2003-09-10 08:53:46 UTC

I s*ck when I backported xft 2.1.2 to our XFree86 package.. I forgot xftrender.c
changes :((

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