Hmm 2 options Jason: a) You are not affected by the bug but are uneducated about QML (it should run on embedded systems and slow systems too) b) You have some sickness about hand-eye coordination.
16G, FX8320 Radeon 5750 for the bug report, do we have one yet? 2014-03-24 3:07 GMT+01:00 Jason H <scorp...@yahoo.com>: > Yeap, I did that. No delay. > > Perhaps you need a faster computer? > > > ________________________________ > From: Damian Ivanov <damianator...@gmail.com> > To: Jason H <scorp...@yahoo.com> > Cc: Willem Bennekom <cumul...@gmail.com>; "<interest@qt-project.org>" > <interest@qt-project.org> > Sent: Sunday, March 23, 2014 1:44 PM > > Subject: Re: [Interest] Input Latency Issues in QtQuick > > go to one corner and move the mouse cursor fast diagonal to the other > corner. you will see that sometimes the rectangle is 1cm away from > your mouse cursor. > > That's called delay. > > 2014-03-23 16:55 GMT+02:00 Jason H <scorp...@yahoo.com>: >> I don't have a problem with the test case. >> AMD A6 Laptop Mint 16/64bit >> >> ________________________________ >> From: Damian Ivanov <damianator...@gmail.com> >> To: Willem Bennekom <cumul...@gmail.com> >> Cc: "<interest@qt-project.org>" <interest@qt-project.org> >> Sent: Saturday, March 22, 2014 6:28 PM >> Subject: Re: [Interest] Input Latency Issues in QtQuick >> >> hmm I can confirm the problem with the test case, depending on what >> application you have this can be from absolutely not important to >> quite a deal-breaker... >> I would fill a bug. >> >> 2014-03-22 23:09 GMT+02:00 Willem Bennekom <cumul...@gmail.com>: >>> For me, the lagging is clearly noticeable on all platforms where vsync is >>> enabled. >>> (Macbook Pro (Nvidia), Linux/Windows Desktop with Nvidia, Windows Desktop >>> with AMD + Angle. >>> It hapopens with all Qt Quick versions.) >>> >>> Here's a minimal test scene (rectangle follows mouse): >>> http://pastie.org/pastes/8959817 >>> >>> 2014-03-22 18:37 GMT+01:00 Damian Ivanov <damianator...@gmail.com>: >>> >>>> for the record: I can't confirm this, QML input is instantly here free >>>> radeon driver (5series) on openSUSE 13.1 64bit. >>>> >>>> 2014-03-22 15:46 GMT+01:00 Willem Bennekom <cumul...@gmail.com>: >>>> > With its current architecture, QtQuick has input latency issues: >>>> > The scene reacts to user input with a slight, but noticeable delay, >>>> > which >>>> > makes >>>> > QtQuick apps feel clumsy and unpleasant to use. >>>> > >>>> > I guess this is related to vsync handling, where input events don't >>>> > immediately >>>> > trigger a repaint while the render thread waits until the framebuffer >>>> > is >>>> > swapped. >>>> > >>>> > The only exception are Windows platforms with native OpenGL on ATI >>>> > cards, >>>> > where the framerate seems to be uncapped: >>>> > The rendering is super responsive, almost like Qt Widgets. >>>> > The drawback is that render thread animators are broken, as they >>>> > aren't >>>> > synced to 60 Hz. >>>> > >>>> > 1. Is there a way to hack Qt to get this Windows+OpenGL+ATI rendering >>>> > behavior on all platforms? >>>> > Maybe some tweaks in qsg*renderloop.cpp? >>>> > >>>> > 2. Are there plans to implement a rendering scheme that reduces input >>>> > latency? >>>> > >>>> > Thanks >>>> > Willem >>>> > >>>> > _______________________________________________ >>>> > Interest mailing list >>>> > Interest@qt-project.org >>>> > http://lists.qt-project.org/mailman/listinfo/interest >>>> > >>> >>> >> _______________________________________________ >> Interest mailing list >> Interest@qt-project.org >> http://lists.qt-project.org/mailman/listinfo/interest >> >> > > _______________________________________________ Interest mailing list Interest@qt-project.org http://lists.qt-project.org/mailman/listinfo/interest
