On Thu, Mar 6, 2014 at 10:20 AM, Stefano Cordibella < stefano.cordibe...@edalab.it> wrote:
> Thank you Jacob for your suggestion, > for this application the choice of using eglfs is not under my direct > control, in addition to this I suppose that the use of X11 can degrade the > performance of the application (the target is a imx6 Single...). > > Did you noticed a decrease in performance moving from eglfs to X11? > Which imx6 did you used? Single Dual or Quad? > > It's just been some very rude basic testing, running a custom QML application on Wandboard Solo and Wandboard Quad. I can't say I've seen any particular overhead in performance in comparing X11/eglfs, but eglfs should in theory use less resources as I see it. As a humble Qt5 user I'm simply suspecting that the eglfs backend has seen less use, and is not as mature as the X11 backend yet. > Stefano. > > > On 03/06/2014 10:05 AM, Jacob Kroon wrote: > > Hi Stefano, > > On Thu, Mar 6, 2014 at 9:22 AM, Stefano Cordibella < > stefano.cordibe...@edalab.it> wrote: > >> Hi Jacob, >> right, I did not specify that I use eglfs. >> >> > I can just talk from my own personal experience in using Qt5+iMX6. In > 5.1.1, eglfs had a hard time tracking the mouse pointer, 5.2.0 improved > things a lot. But best experience sofar has been in using the X11 backend > instead of eglfs. > > Stefano. >> >> >> On 03/06/2014 08:53 AM, Jacob Kroon wrote: >> >> Hi Stefano, >> >> On Thu, Mar 6, 2014 at 8:47 AM, Stefano Cordibella < >> stefano.cordibe...@edalab.it> wrote: >> >>> Hi list, >>> using qt 5.2.2 (release branch from git, but I noticed the same >>> issue with 5.2.1) on I.MX6 it is impossible to flick on qml elements, >>> because the pointer does not "follow" the finger on touchscreen... >>> >>> The strange issue is that with non-qml application (fingerpaint example) >>> or using tslib test application (ts_test) on device the cursor follow the >>> finger at higher speed. >>> Is this a libqtslibplugin.so or a qml issue? >>> I generated the plugin without any option, only qmake, make and make >>> install... >>> >>> I am using tslib library because my touchscreen does not support evdev >>> (it is resistive?); I mean, trying to use EvdevTouch does not work at all, >>> using EvdevMouse I see the pointer moving on screen, but the click doesn't >>> work... >>> >>> Any suggestion will be appreciated... >>> >>> >> Which qpa backend are you using, xcb, wayland or eglfs ? >> >> >> >> -- >> *Stefano Cordibella* >> EDALab s.r.l. - Networked Embedded Systems >> >> Strada Le Grazie, 15 - 37134 Verona - Italy >> email : stefano.cordibe...@edalab.it >> skype : stefano.cordibella >> tel. : +39 045 802 70 85 <%2B39%20045%20802%2070%2085> >> web : www.edalab.it >> > > > > -- > -- Jacob > > > > -- > *Stefano Cordibella* > EDALab s.r.l. - Networked Embedded Systems > > Strada Le Grazie, 15 - 37134 Verona - Italy > email : stefano.cordibe...@edalab.it > skype : stefano.cordibella > tel. : +39 045 802 70 85 > web : www.edalab.it > -- -- Jacob
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