Re: [Interest] QIcon from ARGB32 data

Hi Filip, Thanks a lot for your answer! It well kinda works - an icon is shown but it's garbage, it should not be. Is there any information on the internet (I googled) on argb32 more specifically how it should look like(as byteArray)? I'm asking because I am trying to implement a Qt-only(no kde bi

Re: [Interest] QIcon from ARGB32 data

Am 13.06.2014 um 07:33 schrieb Till Oliver Knoll : > Am 13.06.2014 um 05:58 schrieb Filip Piechocki : > >> ... >> >> QImage image(myByteArray.constData(), width, height, QImage::Format_ARGB32); >> >> Note that the data has to live as long as QImage and all it's undetached >> copies. > > I don

Re: [Interest] QIcon from ARGB32 data

Am 13.06.2014 um 05:58 schrieb Filip Piechocki : > ... > > QImage image(myByteArray.constData(), width, height, QImage::Format_ARGB32); > > Note that the data has to live as long as QImage and all it's undetached > copies. I don't think that's the case: I am pretty sure that QImage makes a /co

Re: [Interest] QIcon from ARGB32 data

On Jun 13, 2014 5:58 AM, "Filip Piechocki" wrote: > > Hu That was supposed to be "Hi" :) > > > On Fri, Jun 13, 2014 at 12:00 AM, Damian Ivanov wrote: >> >> Hello, >> >> I'm trying to show a QIcon from ARGB32 data which come from dbus, > > > Okay, so this means that you have raw pixel data, yes?

Re: [Interest] QIcon from ARGB32 data

Hu On Fri, Jun 13, 2014 at 12:00 AM, Damian Ivanov wrote: > Hello, > > I'm trying to show a QIcon from ARGB32 data which come from dbus, > Okay, so this means that you have raw pixel data, yes? > any help suggestions how to do that? > > I have a QByteArray which contains the data, I tried >

[Interest] WA_StaticContents resize not working in qt5?

Hi I've been trying to port some Qt4 code in Qt5 and running into some issues with a custom QWidget that uses WA_StaticContents and WA_OpaquePaintEvent. This worked fine in Qt4, but with Qt5 whenever I resize the widget its full contents turn black. All other cases seem ok, e.g. covering the

[Interest] QIcon from ARGB32 data

Hello, I'm trying to show a QIcon from ARGB32 data which come from dbus, any help suggestions how to do that? I have a QByteArray which contains the data, I tried QImage image; image.loadFromData(myByteArray); QPixmap pixmap = QPixmap::fromImage(image); return QIcon(pixmap) ; unfortunately this

Re: [Interest] How to speed-up chameleons

You are absolutely right. But that comparison was very interesting for SObjectizer’s users... From: Romain Beaumont Sent: Thursday, June 12, 2014 3:11 PM To: Igor Mironchik Cc: Rainer Wiesenfarth ; interest@qt-project.org Subject: Re: [Interest] How to speed-up chameleons "SObjectizer is a fr

Re: [Interest] How to speed-up chameleons

"SObjectizer is a framework for agent-oriented programming in С++. From one side, SObjectizer is a set of rules and principles for designing programms in agent-oriented style. On other side SObjectizer provides set of C++ classes for implementing agents." Clearly Qt and SObjectizer don't have the

Re: [Interest] How to speed-up chameleons

This small task was done to compare Qt's messaging system with SObjectizer's messaging system :) P.S. Thanks for hammer and nail, lol :) -Original Message- From: Rainer Wiesenfarth Sent: Thursday, June 12, 2014 1:06 PM To: interest@qt-project.org Subject: Re: [Interest] How to speed-up

Re: [Interest] qcamera resolution issue

Yes the backend is DirectShow. You can find the code in "qtmultimedia/src/plugins/directshow/camera". Changing the preview resolution is simply not implemented, it's of course technically possible. Your solution using directly DirectShow doesn't work because a QWidget embedded in a QGraphicsPro

Re: [Interest] How to speed-up chameleons

From: igor.mironc...@gmail.com > Ah, ok. I understand. You suggest to not use signals/slots and use semaphore > instead. > > Well. I think this will improve performance. But it will not use messaging > system of Qt :) http://en.wiktionary.org/wiki/if_all_you_have_is_a_hammer,_everything_looks_l

Re: [Interest] qcamera resolution issue

Thank you for the reply. I assume the backend is direct show, is that correct? I tried to understand the qt code, but could not figure out the backend code, can you please point me to the code? Is there any technical reason whey the backend does not support set resolution? One of the developer

Re: [Interest] How to speed-up chameleons

Ah, ok. I understand. You suggest to not use signals/slots and use semaphore instead. Well. I think this will improve performance. But it will not use messaging system of Qt :) From: igor.mironc...@gmail.com Sent: Thursday, June 12, 2014 12:29 PM To: Romain Beaumont Cc: interest@qt-project.or

Re: [Interest] How to speed-up chameleons

Hi. What might be faster? One more synchronization primitive in the code will increase performance? From: Romain Beaumont Sent: Thursday, June 12, 2014 9:48 AM To: Igor Mironchik Cc: interest@qt-project.org Subject: Re: [Interest] How to speed-up chameleons It might not be necessary (ie you

Re: [Interest] qcamera resolution issue

On Jun 12, 2014, at 7:51 AM, Sarath Natakam wrote: How can one set the desired resolution for streaming? The user of this application will have a drop down to select resolution and preview it in that resolution. The Qt multimedia backend for Windows doesn't implement that feature, the camera p

Re: [Interest] How to speed-up chameleons

It might not be necessary (ie you can use something else instead) but it might be faster ;) 2014-06-12 8:22 GMT+02:00 : > Hi. > > First chameleon waits for another, i.e. he doing nothing while another > will not come to the meeting place. And here semaphore is not necessary. > > Most slow plac