[squeak-dev] Fwd: Problem with fonts on Linux with compositing activated

Juan Vuletich juan at jvuletich.org
Thu Sep 11 13:40:14 UTC 2008


Hi Folks,

Please see the mail I've just sent, with subject: "Problems with 
NiceFonts and composite window managers Re: [squeak-dev] Re: 
[ANN][Squeak-dev Images] September 2008 versions".

Cheers,
Juan Vuletich

Ken Causey wrote:
> On Sun, 2008-08-17 at 17:04 +0200, Bert Freudenberg wrote:
>   
>> Am 17.08.2008 um 11:29 schrieb laurent laffont:
>>
>>     
>>> Hi,
>>>
>>> I've switched to KDE4 and played with composite rendering.  With  
>>> last squeak dev images some fonts are not rendered: it seems to be  
>>> interpreted as a transparent region by the composite manager (see  
>>> screenshot). I've tested this on my two debian boxes.
>>>
>>> This problem is not present in sq3.9.1-7075dev08.07.1 image, so I  
>>> suppose it's due to NiceFont integration ?
>>>       
>> Maybe it occurs more often with nice fonts, but it actually is a  
>> combined VM/image problem.
>>
>> The VM prefers a 32 bit X visual (with alpha channel) over a 24 bit  
>> one. If a compositing window manager is used, the alpha channel is  
>> used for transparency, but the image generally does not care about the  
>> alpha channel in its frame buffer.
>>     
>
> Does that mean there is some core location(s) where the alpha channel
> needs to be defaulting to full opacity but currently it is not?
>
> Ken
>
>   
>> The olpc branch in the SVN repository has a fix for that, see
>>
>> http://tinyurl.com/6fhqmw
>>
>> - Bert -
>>     
>
>   
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