All Questions
Tagged with framebuffer qt
58
questions
0
votes
1
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77
views
My embedded application doesn't receive keyboard events (Linux framebuffer/Qt+QML application/systemd service/VNC server)
I need to remotely control a Qt / QML application on an embedded ARM instrument. I intended to do that using VNC. This doesn't work. An USB keyboard plugged in the instrument doesn't work either.
NB: ...
0
votes
0
answers
56
views
Can we have graphical server on ttyS*
I have a "c5.2xlarge" AWS EC2 instance running an application. Upon system starting, we perform some initial setup. This starter page uses JavaScript and QT for its application. We also use ...
0
votes
0
answers
95
views
QT app flickers after psplash-systemd finishes
I have a linux system created in Yocto running on Raspberry Pi CM4 and I am using psplash utility for splashscreen. During early stage of boot I also launch my qt app (before psplash-systemd is ...
- 31
0
votes
1
answer
833
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Click and mouse cursor events are inverted when using VNC in my QT application
I am programming a QT application which is deployed to a linux embedded system. It uses the TSLIB for touch screen, and a framebuffer VNC server. When I use the touch screen, it works just fine. ...
- 111
1
vote
1
answer
2k
views
Qt OpenGL QGLFramebufferObject: Framebuffer incomplete attachment
Can any one tell me why my code works on local machine but not on a remote machine I'm trying to push to?
local driver version: NVIDIA-SMI 460.91.03 Driver Version: 460.91.03
remote driver version: ...
1
vote
1
answer
104
views
Draw a transparent framebuffer onto the default framebuffer [closed]
I'm facing this situation where I need to render the content of a framebuffer object onto the screen. The screen already has some contents onto it and I would like to draw the contents of my ...
- 863
2
votes
1
answer
978
views
How to blit two transparent frame buffer objects using QOpenGLFramebufferObject?
I have two FBOs created using QOpenGLFrameBufferObject, which are images with a transparent background and some lines and text on top of them. I am blitting the first fbo onto the second using ...
- 863
1
vote
0
answers
180
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Display Camera Input in / onto QT application HOWTO / Way to go
I am working on the implementation of a QT application on an Embedded Linux Display with CAN Bus Interface and PAl Camera Interface. The overall aim is to visualize then Sensor Data of the machine (...
- 41
2
votes
0
answers
240
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Qt framebuffer app doesn't start on Raspberry (BUILDROOT)
i'm building my personal embedded OS that execute a gui at startup in less than 4 seconds.
I didn't installed X.org platform because Qt can run over linuxfb without a Desktop Environment.
If i launch ...
0
votes
1
answer
637
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How to fix strange artifacts when applying Gaussian blur in OpenGL ES 2.0
I am getting strange artifacts when applying Gaussian Blur for a bloom effect in OpenGL ES 2.0 (with QT), as you can see below. On the left is with the bloom effect enabled, and on the right is with ...
- 435
6
votes
1
answer
5k
views
How to rotate a Qt5 application using the linux framebuffer?
I have an embedded linux application running directly on the linux framebuffer (no x-Windows). We now have to physically rotate the display 180 degrees. How do I get my Qt application to rotate so ...
- 1,375
2
votes
1
answer
1k
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How to overcome differences between off-screen and on-screen framebuffer rendering?
I'm trying to use an off-screen framebuffer to replicate a scene that renders wonderfully to the default framebuffer. There seem to be differences in the rendering that I can't sort out.
For context,...
- 435
3
votes
0
answers
557
views
Specify pixel format for Qt Framebuffer
I am developing a application on an iMX6UL board using Qt 5.11 and framebuffer platform plugin. The underlying board has connected 16 wires to a 24-bit RGB parallel display, so the output format is ...
- 10.7k
1
vote
0
answers
968
views
black screen flicker after starting QT linux application?
I used embedded linux (imx6q) with eglfs.
Framebuffer is drawing black screen while starting Qt application.
Simple application is black for 1sec under. Heavy application is for 4~5sec.
This happens ...
- 39
-2
votes
1
answer
2k
views
OpenGL : object selection
I'm trying to implement object selection in OpenGL, but I have some problems.
As you can see from the figure, the selection works well in the first view, but when you rotate the camera, the object is ...
- 669