14,025 questions
- Bountied 0
- Unanswered
- Frequent
- Score
- Trending
- Week
- Month
- Unanswered (my tags)
0
votes
1
answer
62
views
Yocto Qt Toolchain Generation for STM32MP1
Hardware context :
stm32mp157f-dk2 eval board
Software context :
Ubuntu 22.04.5 LTS
Yocto Release 5.0 LTS Scarthgap
Layers :
- poky
- meta-openembedded
- meta-qt6
- meta-st-stm32mp
...
2
votes
1
answer
117
views
How to achieve zero-copy rendering from Qt QPainter to dmabuf using shared EGL contexts?
I'm trying to implement a zero-copy pipeline that renders Qt QPainter content directly to a dmabuf framebuffer for display via DRM/KMS. My goal is to leverage QPainter's high-level drawing APIs (text, ...
2
votes
0
answers
91
views
Android App with Go Library Causes OpenGL Errors
I am working on an Android application developed in Kotlin that integrates a third-party library written in Go. This library has been compiled as an AAR file and integrated through Gradle's build....
0
votes
1
answer
82
views
Why trivial QOpenGLWidget widget appears with black background?
To workaround a Qt 6.9.0 display issue under Android (https://bugreports.qt.io/browse/QTBUG-128794), I'm trying to replace my QMainWindow central QWidget by a QOpenGLWidget.
I did that, it ...
0
votes
2
answers
70
views
How to disable gamma correction in an OpenGL ES Android app?
I'm currently developing an Android application that uses OpenGL ES for rendering.
In order to achieve consistent visual output across different devices, I would like to disable gamma correction in my ...
0
votes
0
answers
44
views
Display fixed point using ARCore with GeospatialMode
I have a fixed point defined by (azimuth, elevation) = (0 NORTH, 10° above horizon), and I want this point to be displayed/visualize through the camera using ARCore when the camera is pointing in that ...
-1
votes
1
answer
75
views
Android OpenGL ES glReadPixels() saves black image to gallery even though preview is fine
I’m working on an Android project using OpenGL ES (and Tencent’s TEBeautyKit) to create a camera preview with beauty filters.
The preview works fine — the camera feed displays correctly with all ...
0
votes
0
answers
95
views
OpenGL ES sync, how to send the completed signal by the CPU?
Through the extension EGL_KHR_fence_sync, we can achieve multi-threaded GPU synchronization by using interfaces such as eglCreateSyncKHR(), eglDestroySyncKHR(), and eglClientWaitSyncKHR();
When the ...
0
votes
1
answer
122
views
How to get the frame buffer of current Activity's window surface on GPU side without copy?
I need to get the image of current activiy surface with 30-60 FPS and use it as the source texture in opengl es for rendering.
I found the API PixelCopy can copy the window surface to bitmap, but I ...
1
vote
0
answers
29
views
Application crashes with access violation in glWaitSync during multi-monitor configuration changes
Problem Description:
My Qt Windows application crashes when changing display configurations (e.g. resolution changes, multi-monitor setup modifications). The crash occurs specifically in a ...
0
votes
1
answer
44
views
Is there any difference in sampling when using TEXTURE_MIN_LOD with -1000, -1, or 0?
Is there any difference in the sampling result of a texture when TEXTURE_MIN_LOD is set to -1000 (the default) or -1 or 0?
To ask it another way, what is the point of allowing TEXTURE_MIN_LOD < 0? ...
0
votes
0
answers
40
views
Capture camera video feed with webview overlay like prism live
I am wondering how to capture the video feed from camera, add a webview overlay then encode the feed with overlay to mp4 in real time?
I am not an android developer, I know this is very complicated, ...
1
vote
0
answers
39
views
Use a custom Surface to render CameraX's Preview data
I'm using the CameraX component in Android, and according to the Android documentation, I can use Preview.setSurfaceProvider() to set up the rendering interface. However, I do not want to render it on ...
2
votes
1
answer
123
views
How to Load OpenGL Textures in a Background Thread Without Slowing Down the Main Thread?
I'm developing a native mobile application that renders textures on an OpenGL surface. The goal is to maintain a smooth scrolling experience, similar to how Instagram loads images.
Current ...
3
votes
2
answers
1k
views
SDL3 fails to create OpenGL ES 2.0 context?
I am working on an OpenGL project using the SDL3 and OpenGL ES 2.0. For the moment, I have a basic code which creates a window with the drawing of a triangle. The issue here is that the glCreateShader(...