Hi Raster,

On Fri, Jan 4, 2013 at 12:45 PM, Carsten Haitzler <ras...@rasterman.com> wrote:
> On Fri, 4 Jan 2013 11:21:28 -0200 Gustavo Sverzut Barbieri
> <barbi...@profusion.mobi> said:
>
>> On Fri, Jan 4, 2013 at 10:56 AM, Carsten Haitzler 
>> <ras...@rasterman.com>wrote:
>>
>> > On Fri, 4 Jan 2013 10:42:13 -0200 Gustavo Sverzut Barbieri
>> > <barbi...@profusion.mobi> said:
>> >
>> > ooh also.. with software comp.. rememebr that the async renderer is still
>> > busy
>> > rendering in the bg.. THEN sw comp in  the mainloop is grabbing pixels to
>> > ximages WHILE sw evas is rendering async.. THEN it uses those ximages -
>> > their
>> > pixel data is SET to be theimage pixel data, and then an sync sw render
>> > uses
>> > that pixel data we grabbed async to the rendering of it (that used to be
>> > sync) :) if its sw comp - but i've seen sync issues with gl comp and
>> > content
>> > containing incorrect pixels. :)
>>
>>
>> I couldn't understand what you mean. Seems you're getting some ideas on
>> where is the problem, then:
>>
>>  1 - explain that in a more understandable way :-P
>>  2 - look into comp code to see where the problems could be. You wrote it,
>> then you know that quite well.
>>
>> We can help you with #2 if you do #1 and let us know where to to pin point.
>
> comp can sync its canvas. it can ensure it is no longer rendering before it
> changed the image data ptrs...
>
> BUT... it cant sync the canvases in the borders, or the menus, or the
> background or the popups. these are separate windows and canvases. literally e
> is doing x(shm)getimage() the pixels from x11 when updates happen. since async
> rendering may be rendering a NEW frame WHILE it is doing a getimage for the
> old one (the border canvas is rendering async to the comp canvas in its own
> thread),

What do you mean by its own thread here? You did see we have just one
render thread for all canvases, right? Or am I missing what you really
said here?

-- Ulisses

> this will be a source of issues. before because evas_render was
> synchronous, this serialized rendering ensuring it was done in a popup/border
> etc. BEFORE comp grabbed the pixels and rendered the comp canvas. NOW.. this
> other rendering may still be underway in parallel.


-- 
Ulisses Furquim
ProFUSION embedded systems
http://profusion.mobi
Mobile: +55 19 9250 0942
Skype: ulissesffs

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