[LAD] Xputty - damn tiny abstraction Layer to create X11 window/widgets with cairo surfaces

[Hermann Meyer]

Am 21.07.19 um 16:25 schrieb Hermann Meyer:
>
> Am 20.07.19 um 21:35 schrieb Will J Godfrey:
>> On Sat, 20 Jul 2019 17:24:47 +0200
>> Hermann Meyer <brummer- at web.de> wrote:
>>
>>> However, I've setup a online Documentation for libxputty here:
>>>
>>> https://brummer10.github.io/Xputty/html/xputty_8h.html
>>>
>>> regards
>>>
>>> hermann
>> And *that* is the best news of the lot!
>> So many projects have little or no documentation until they are a
>> very long way
>> into development.
>>
>
> Yea, I've made the experience that I never ever do any documentation
> "afterwards". So this time I would do it from the beginning on. At least
> it helps as well myself, to not forgot what it is about.
>
> However, today I make a big step regarding transparent widgets. Those
> who've done any development with X11 and cairo knows that it could be
> tricky.
>
> Today I find out that the big difference is to NOT USE
> cairo_image_surface_create. Avoid it. When working in a X11 context, the
> way to go is cairo_surface_create_similar on the xlib surface as buffer.
> This avoid unnecessary coping the image data from the graphic server to
> CPU and back. The CPU footprint boils down to below 2% on full screen
> action here. Even on resize action, when the surfaces needs to be
> resized/destroyed and new created.
>
> Before this change CPU could reach 80% and more and the desktop starts
> to stutter.
>

. . . and now the first widgets been implemented, like buttons, sliders,
and a knob. Also a theming engine is in place. A example for how to use
it is in the examples folder.