[OpenJDK 2D-Dev] RFR: 8221741 [AIX] Unexpected X11 bitmap fonts are loaded because of fontconfig.properties

[Phil Race]

On startup ?
What is the Java stack trace that gets you into that call ?
Is it this with any modified IBM code, or pure OpenJDK ?

-phil.

On 4/17/19 11:55 PM, Ichiroh Takiguchi wrote:
> Hello Phil.
>
> I appreciate your reply.
> I put problem analysis information in JDK-8221741 [1].
>
> The issue is AIX's Xserver was frozen about 25 secs on my local AIX box.
> According to my problem analysis,
> In this case, Java tried to load large 11 X11 bitmap fonts via 
> XLoadQueryFont() on Xlib.
> The situation can emulate by "xlsfonts -ll" command, like:
>
> $ time xlsfonts -ll -fn 
> "-monotype-sansmonowt-medium-r-normal--*-80-72-72-*-*-ucs2.cjk_japan-0"
> ...
> real    0m2.07s
> user    0m0.00s
> sys 0m0.00s
>
> One of solution is, Unix's fontconfig.properties can support 
> TrueType/Type1 font name format. [2]
>
> Anyway,
> I don't know the reason why X11 bitmap font is required for logical font.
> (I don't know how to use X11 bitmap font for physical font.
> I could not see X11 bitmap font name via
> GraphicsEnvironment.getLocalGraphicsEnvironment().getAvailableFontFamilyNames().) 
>
> I just want to fix Xserver frozen issue.
> I appreciate your advice.
> (Other solutions are welcome)
>
> [1] https://bugs.openjdk.java.net/browse/JDK-8221741
> [2] https://cr.openjdk.java.net/~itakiguchi/8221741/webrev.00/
>
> Thanks,
> Ichiroh Takiguchi
> IBM Japan, Ltd.
>
> On 2019-04-04 01:09, Philip Race wrote:
>> On 4/2/19, 9:27 AM, Ichiroh Takiguchi wrote:
>>> Hello.
>>> (I am sorry to post it again. Previously, I posted the wrong mailing 
>>> list.)
>>>
>>> Could you review the fix ?
>>>
>>> Bug:    https://bugs.openjdk.java.net/browse/JDK-8221741
>>> Change: https://cr.openjdk.java.net/~itakiguchi/8221741/webrev.00/
>>>
>>> I'd like to obtain a sponsor for this issue.
>>>
>>> On AIX platform, fontconfig.properties file is used to pick up 
>>> proper fonts.
>>> TrueType font settings are written by XLFD format on 
>>> fontconfig.properties file.
>>>
>>> On current implementation, Java tries to load X11 bitmap fonts even 
>>> if these are not used.
>>
>> I think you need to clarify what you mean here.
>>
>> I'd like you to provide a step by step analysis of what happens and
>> what the effect of your proposed change is on AIX *AND* what it might
>> mean for other X11 platforms, as I don't have time to reverse 
>> engineer the
>> reasons for the odd-looking change.
>> It looks like a hack to short-circuit support your syntax.
>> Right now I am saying no to this.
>>
>>> This font load work is almost name as "xlsfonts -ll".
>>> It spends many CPU time and memories.
>>>
>>> Just font name format should be supported.
>>
>> Not clear enough for me.
>>
>> -phil.
>>>
>>> To SAP representative,
>>> I have a question about copyright year on 
>>> make/data/fontconfig/aix.fontconfig.properties.
>>> Please let me know how I should write down copyright year.
>>>
>>> Thanks,
>>> Ichiroh Takiguchi
>>> IBM Japan, Ltd.
>>>
>