Hi all, Just an update in case anyone else has run into the same issue.
Typically our app is run as follows: ./app -platform eglfs But when I use the following I can capture the data displayed on-screen: ./app -platform linuxfb:fb=/dev/fb0 It may not be exactly what I wanted but it gives me a relatively straight-forward way to capture screenshots for our user documentation. Credit goes to this comment https://stackoverflow.com/questions/50236156/making-a-qt-gui-application-run-on-a-framebuffer-in-linux#comment87592068_50236352 Regards, Evan -----Original Message----- From: yocto-boun...@yoctoproject.org [mailto:yocto-boun...@yoctoproject.org] On Behalf Of Evan O'Loughlin Sent: 17 April 2019 17:09 To: 'yoctoproject....@herrie.org' <yoctoproject....@herrie.org> Cc: yocto@yoctoproject.org Subject: ** Potentially Unsafe Email ** Re: [yocto] Screenshot tool Hi Herman, Thanks for providing links to the screenshooter source. Based on your code I've tried implementing a similar method within our application but I still get a blank (black) image. It's possible that under the hood the 'grabWindow' method is just saving the framebuffer. Regards, Evan -----Original Message----- From: Herman van Hazendonk [mailto:m...@herrie.org] Sent: 16 April 2019 10:19 To: Evan O'Loughlin <evan.olough...@vitalograph.ie> Cc: yocto@yoctoproject.org Subject: Re: [yocto] Screenshot tool Hi Evan, We don't currently have a 4.9 kernel running for our project since we're working mainly with mobile devices which are stuck on 3.4 and 3.18 kernels for now, however we do have small screenshot utility which we have as a plugin to our compositor which we have been using since early Qt5 releases and we're currently on Qt 5.11/5.12. Might be worth to give a go at your end: https://github.com/webOS-ports/luna-next/blob/f5fc4c8af0d0c6f74f57d3963eb570966bc8fa55/plugins/compositor/screenshooter.cpp And the header file at: https://github.com/webOS-ports/luna-next/blob/f5fc4c8af0d0c6f74f57d3963eb570966bc8fa55/plugins/compositor/screenshooter.h Hope this helps. Best regards, Herman On 2019-04-16 09:15, Evan O'Loughlin wrote: > Hi, > > I’m currently using yocto to build a custom OS based on Linux 4.9 for > our hardware: > Build Configuration: > BB_VERSION = "1.32.0" > BUILD_SYS = "x86_64-linux" > NATIVELSBSTRING = "Ubuntu-16.04" > TARGET_SYS = "arm-linux-gnueabi" > MACHINE = "CUSTOM_MACHINE_NAME" > DISTRO = "arago" > DISTRO_VERSION = "2017.12" > TUNE_FEATURES = "arm armv7a vfp thumb neon > callconvention-hard" > TARGET_FPU = "hard" > meta-processor-sdk = "HEAD:92db4d8023d88ab59fab2953e7447ec0bd5a6db1" > meta-ros = "HEAD:e2566402ab108a19634354a934788109422cf409" > meta-arago-distro > meta-arago-extras = "HEAD:5b2a44b0c4d989133bc13d59398fd10375d351bb" > meta-browser = "HEAD:26d50665e2f7223c5f4ad7481a8d2431e7cb55fb" > meta-openamp = "HEAD:8a214032bfb7e8124bc1485c70c69f7d60abb819" > meta-qt5 = "HEAD:2c9f0e4eb0e9097f6f872ec1e1d81768a8ab5f1b" > meta-networking > meta-ruby > meta-python > meta-oe > meta-gnome > meta-multimedia = "HEAD:b40116cf457b88a2db14b86fda9627fb34d56ae6" > meta-ti = "HEAD:3dc08477529b31ce887bb22a08201a843ded48f0" > meta-linaro-toolchain > meta-optee = "HEAD:d73e794c7e7ebb1cc5bf495a52a72b26fb118250" > meta = "HEAD:39fd8c129e2bff7f2f1649b7f6e036ccc50fd5d8" > meta-custom = "########################################" > meta-printing = "morty:72811bc3755d1a943fa2a2e79601781b44a77420" > > > We run a Qt5 application using EGLFS but can no longer capture > screenshots. > In a previous yocto build based on Linux 3.x we were able to use a > screenshot tool which effectively just read /dev/fb0 to a file. > > I believe this was a change to how the underlying drivers interact > with the GPU/Screen - I've started reading up on KMS/DRM. > > > Does anyone know is there a utility/tool which I could use to capture > the Qt5 application as its drawn on screen? > > > Regards, > Evan -- _______________________________________________ yocto mailing list yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/yocto -- _______________________________________________ yocto mailing list yocto@yoctoproject.org https://lists.yoctoproject.org/listinfo/yocto
