[OpenJDK 2D-Dev] CR 7029934 : Xrender: Text is truncated with 64 bit Linux JRE

[Clemens Eisserer]

Hi Phil,

The problem was caused by the assumption that sizeof(int) ==
sizeof(XID), however Xlib uses unsigned long for XIDs, even if XIDs
are defined to be 32-bit on wire.  According to the xorg mailing list
ists safe to store those values in 4-byte variables, the only case
which needs attention are arrays.

In this case the problem was I passed a Glyph* to
XRenderCompositeText, which however expected a unsigned int*. Both are
4bytes wide on ia32, but Glyph is 8 bytes on amd64. XRenderFreeGlyphs
was also affected.

- Clemens

PS: I can't access information for 7029934 - which seems to be rather
common for many bug-numbers I see floating arround on the mailing
lists. Any idea why?


2011/3/22 Clemens Eisserer <linuxhippy at gmail.com>:
> Hi Phil,
>
> I'll have a look at this one soon.
> I also hope to fix the bug causing intellij's editor to be completly
> unuseable before jdk7's freeze phase - however I guess I'll need a
> little help for that.
>
> Just remembered that I promies results some time ago, sorry, I'll send it soon.
> Its just, university is giving me a really hard time. Starting with
> 6th April everything will be far more relaxed =)
>
> Thanks, Clemens
>
>
> 2011/3/22 Phil Race <philip.race at oracle.com>:
>>
>>        Clemens,
>>
>> Have you tried 64 bit Linux JRE? SQE reports, and I have verified, text is
>> truncated
>> But only on Linux. Solaris is OK. B&W, greyscale, LCD are all the same.
>>
>> -phil..
>>
>>
>>
>>
>>
>>
>>
>>
>> *Change Request ID*: 7029934
>>
>> *Synopsis*: Xrender: Text is truncated with 64 bit Linux JRE
>>
>>
>> === *Description*
>> ============================================================
>> java version "1.7.0-ea"
>> Java(TM) SE Runtime Environment (build 1.7.0-ea-b134)
>> Java HotSpot(TM) 64-Bit Server VM (build 21.0-b04, mixed mode)
>>
>> Platform: OEL6
>> 2.6.32-100.28.5.el6.x86_64 #1 SMP Wed Feb 2 18:40:23 EST 2011 x86_64 x86_64
>> x86_64 GNU/Linux
>>
>> Problem:
>> When launch Java2Demo in OEL6 machine, the text partially shows in the
>> application. It only happens in 64 bits java.
>> I tried 32 bits java, the demo looks fine.
>>
>> Please see attached screen shot for detail.
>>
>> How to reproduce the problem:
>> 1, Launch the demo by using jdk1.7.0-b134 ever early versions(like b120)
>> 2, When the demo GUI comes up, you can see all text in frame shows only
>> partially
>> [root at dhcp-santaclara22-2fl-west-10-132-182-109 linux-x64]# bin/java -jar
>> -Dsun.java2d.xrender=True demo/jfc/Java2D/*.jar
>> XRender pipeline enabled
>> Xrender: INFO: Jules library not installed.
>>
>> You can use the OEL6 machine to reproduce this problem,
>> I add machine info is in comments
>>
>> *** (#1 of 1): 2011-03-22 16:41:39 GMT+00:00 tao.t.zhang at oracle.com
>> *** Last Edit: 2011-03-22 17:15:42 GMT+00:00 tao.t.zhang at oracle.com
>>
>>
>> === *Evaluation*
>> =============================================================
>> Looks bad. Seems like all text rendering that goes via Xrender is truncated.
>> Looks like the first half of any given drawString is visible and the rest is
>> missing. Its not specific to Java2Demo. Its in SwingSet2 and in applet
>> demos.
>>
>> It seems to have been this way since the first Xrender build (b97) and its
>> not just OEL 6. Its also Ubuntu 10.04, so probably all 64 bit Linuxes.
>> But 64 bit Solaris on Intel/AMD is fine!
>>
>> I reproduced this displaying remotely from an OEL 6 box and an Ubuntu box
>> with Solaris 11 x86 as the display server, so its presumably something on
>> the client (application) end.
>> The code is all the same so maybe its something to do with the compilation.
>>
>> *** (#1 of 1): 2011-03-22 20:37:53 GMT+00:00 philip.race at oracle.com
>>
>>
>>
>>
>
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