Re: cairo x11 surfaces

[Eric Wasylishen]

Thanks for the feedback, everyone.

Wolfgang, that's an interesting bug. I couldn't reproduce it with GNUstep 
running on Ubuntu 10.10 / x86-64 with cairo 1.10.0, exporting the display to a 
PowerPC iBook running OS X 10.4 and X11.app. What are the details of the setup 
you tested? My first thought is it might be a cairo bug since cairo handles all 
of the details of transferring surfaces to the X server with this new surface.

Niels: that's interesting. I'll install kde and see if I can figure out why it 
is slow with compositing enabled.

Phillipe, thanks for the update. I noticed some flickering too which I will 
investigate.

-Eric



On 2011-10-14, at 5:14 AM, Wolfgang Lux wrote:

> Eric Wasylishen wrote:
> 
>> I had a look at implementing it today, and it turned out to be easier than 
>> expected so I finished & committed it.
>> 
>> If we run in to problems we can switch back to XGCairoXImageSurface before 
>> the next release, but it looks promising. In particular, I tried X 
>> forwarding to Apple's X11.app, which only supports 24-bit windows, and the 
>> new surface is significantly faster than XGCairoXImageSurface, and the alpha 
>> channel of images is correctly preserved (unlike XGCairoSurface).
>> 
>> Riccardo, this should fix GNUstep on the 16-bit display configuration where 
>> it wasn't working for you. If you could test it some time and let me know if 
>> it works, that would be great.
> 
> Nice change. However it has a subtle endianness bug. When the display is on a 
> machine with a different endianness than the machine running the application 
> (e.g., PowerPC vs. x86), the colours of all icons are displayed incorrectly. 
> See the SystemPreferences and Color panel screenshots below.
> 
> Wolfgang
> 
> <SystemPreferences.tiff><ColorPanel.tiff>