Questions tagged [opengles]
OpenGL ES is a cross-platform API for 2D and 3D graphics on embedded systems. It has different subset profiles of desktop OpenGL for fixed function hardware and programmable hardware.
67
questions
0
votes
0
answers
33
views
Chiaki on a Zero 2 failing on an egl error
I installed Chiaki on the latest RaspberryOS, using apt install, when trying to launch it, I'm getting an EGL error:
Could not initialize egl display
Every search I did found only developers ...
- 101
0
votes
0
answers
63
views
Export/import dmabuf
I wanted to ask do I need extra modifications for kernel I am running (it's a Ubuntu 22 desktop). Essentially, I have logic that exports and import (in another process) dmabuf of a opengl texture. ...
0
votes
1
answer
53
views
Glxgears 1 FPS over VNC with RealVNC - Raspberry Pi 4 B
I have a Raspberry Pi 4B and over VNC, glxgears will only give me 1 FPS.
But over regular HDMI cable to a screen, then glxgears works like a charm.
So is there any problem with the VNC server inside ...
- 105
0
votes
0
answers
44
views
Image generated using buildroot, VC4 fails to detect hdmi
I had built a raspberry pi4 64bit image using buildroot (latest LTS release). I see it's booting with 5.10.x kernel, however vc4 driver does not detect HDMI. Upon modprobe vc4.ko I see these logs.
[ ...
- 101
1
vote
2
answers
545
views
X server unable to launch using vc4-kms-v3d GL driver on a 8gb Pi4b+
I've been encountering some tearing issues in kodi and so chose to switch to the vc4-kms-v3d driver in my boot config. The performance in now significantly improved, however I also occasionally need ...
- 11
0
votes
0
answers
572
views
OpenGL on a 64-bit Raspberry Pi 4 without X
I wrote a 3D visualization program in C++ called ahrs-visualizer back in 2012 for a 32-bit Raspberry Pi, basing my code on the official OpenGL example code that came with Raspbian. It does not ...
- 101
1
vote
1
answer
630
views
Redshift on Raspberry Pi 4
Is there any way to use Redshift on Raspberry Pi 4? I used redshift -P -O 3700 -g 0.7 -b 0.7 and it only works from time to time. Some times after restarting it doesnt filter the blue light anymore. ...
- 19
0
votes
0
answers
870
views
OpenGL experimental missing
I'm using Raspberry Pi 4 and the OpenGL experimental is missing from raspi-config
I tried
sudo rpi-update
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get install raspi-gpio
sudo apt-get ...
- 19
0
votes
1
answer
736
views
How to increase the frame rate in Stellarium
I have a freshly installed Raspberry Pi OS on my Raspberry Pi 3 Model B. According to cat /proc/device-tree/model, the OS name is "Raspbian GNU/Linux 10 (buster)". I have installed ...
- 269
1
vote
1
answer
2k
views
Raspberry pi screen rotation with OpenGL
As titled, in raspianLite, if I enable OpenGL (fake KMS) I'm unable to rotate the screen using the
/boot/config.txt
file
i tried:
display_hdmi_rotate=1
and
display_rotate=1
with no success, any ...
- 11
1
vote
1
answer
170
views
Headless Rpi 4 reboots when changing resolution
I hope someone can help me, I've bought my first Rpi a few months ago and I haven't been able to use it at all because of this issue.
Specs:
Raspberry Pi 4 - 4GB
OS: Raspberry Pi OS with desktop
Fully ...
- 11
1
vote
0
answers
71
views
Fast way to copy from GPU to CPU
I have made some image processing shaders to reduce the CPU load.
But the slow GPU to CPU data copy is something I didn't expect. (It takes around a second to copy a single image)
As far as I know, ...
- 121
0
votes
1
answer
2k
views
I would like to install blender on my raspberry pi4 [closed]
I am trying to install blender 2.79 from the software packages on my new raspberry pi4. It won’t do it. How do I install and run blender?
1
vote
0
answers
723
views
Chromium Embedded and GLESv2
I'm trying to use an app compiled with Chromium Embedded Framework (using the pre-built ARM binaries hosted by Spotify; I don't want to rebuild it myself). I'm having trouble getting hardware ...
- 211
1
vote
0
answers
71
views
glGenerateMipmap crashes on Raspberry Pi 3
I'm testing a C++ program made with GLFW and it crashes with a segmentation fault on Pi 3 but not on Pi 4.
The reason of the crash is the call to glGenerateMipmap(GL_TEXTURE_2D).
Systems tested:
...
- 111
0
votes
2
answers
126
views
Capable of building Mesa 20.1 but unable to install
I have successfully built Mesa 20.1 on Raspberry Pi OS 64bit, using burtoogle's patch (https://www.raspberrypi.org/forums/viewtopic.php?f=67&t=276207#p1681901)
I followed the instructions from ...
- 111
3
votes
2
answers
3k
views
Raspberry Pi 4 GPU math
So there is support for Open GL ES 3.1, but how can I use it on the Raspberry Pi 4?
Is there any other way to use the GPU for calculations such as fft and logarithm?
- 31
2
votes
1
answer
2k
views
libGL error: failed to load driver: vc4
I'm cross compiling an OpenGL application that I am then trying to run on an rpi4 with Ubuntu 20.04, but I am getting the following error:
libGL error: MESA-LOADER: failed to open vc4 (search paths /...
- 121
2
votes
0
answers
769
views
Proper GL Driver configuration on RPi 4
Can someone confirm what I should do on a raspberry pi 4 to access the new DRM based opengl drivers? I expected to see a new option in raspi-config for it, but instead I only see the legacy and fake ...
- 121
1
vote
1
answer
221
views
OpenGL 2 slowness
The Raspberry Pi 3b+ runs my OpenGL 2.1 program very slowly, with a frame rate of around 2 fps. How is this possible, when Python/Pyglet can render (using OpenGL, I suppose) much faster than this? And ...
- 729
2
votes
1
answer
503
views
Getting OpenGL ES Framebuffer back to CPU Memory
I've started learning how to use OpenGL ES, and am trying to do some general purpose computing using the Pi's GPU. I've got it mostly working, but I'm hung up on the last step: getting a framebuffer ...
- 121
0
votes
0
answers
2k
views
How to play 720p/1080p videos on Raspberry Pi 3 A+
I bought a Raspberry Pi 3 A+ hoping, among other things, to play HD videos. I have flashed Raspbian Buster on a 64GB microSD card, extended the FS, and, generally, the Pi seems to work fine with light ...
- 113
1
vote
2
answers
314
views
Can't OpenGL render points and lines on RPi4 (specifically)
How to get OpenGL.glDrawElements(GL_POINTS, ..) (or GL_LINE_LOOP, GL_LINE_STRIP, GL_LINES) to work with the latest Raspberry Pi? I maintain the pi3d module and, though it works on windows, linux and ...
- 325
2
votes
0
answers
1k
views
Latest Qt5 does not provide EGLFS during cross-compilation
Some time ago I set up a Linux host to cross-compile Qt5. I used this configure command:
./configure -release -opengl es2 -device linux-rasp-pi3-g++ -device-option CROSS_COMPILE=~/opt/tools/arm-...
- 517
1
vote
1
answer
297
views
Qt Userland raspistill/racpicam integration - Unable to find an X11 visual which matches EGL config
I am developing simple gui app for a client on Raspberry pi running Ubuntu(Mate) 16.04 using Qt 5.5.1 and OpenCV for some face recognition (all C++) using 5MP pi camera.
The framerate/CPU usage ...
- 223
0
votes
0
answers
303
views
Pi 3 Model B+ can't boot after changing vRAM
I just got the device (Pi 3 Model B+) and am a total beginner.
I'm using NOOB/Raspbian. Every time I try to change the video ram (either through the GUI or the config.txt) the device is unable to ...
1
vote
0
answers
167
views
Slideshow program to use with Raspbian and OpenGL?
I have a Pi 3 Model B+ which I wanted to use as a device to show a slideshow for images on a screen. I'm using Raspbian and was happy with FEH, but since another program ("redshift", a blue light ...
0
votes
0
answers
70
views
Which video driver is faster, more stable? Which api makes it easier to write efficient code? Which one should I use on Raspberry 1 B+?
OpenSource Full KMS VC4 + Opengl 2.0 + openbox/some lighter than openbox window manager/lack of thereof + x.org
Broadcom VC4 + Opengles 2.0 + native(no x.org)
Can I use GLFW library with both?
...
0
votes
1
answer
1k
views
Omxplayer doesn't play videos when OpenGL enabled
Today I setup my new RPI3 B+ with raspbian stretch as a desktop (OpenGL enabled 128 mem split). I use RPIs for some time as servers but not as desktop. I tried to play video (with avc codec) with ...
- 1
0
votes
0
answers
759
views
VC4 — GL setup not working
I am trying to run chromium as weston-client using ArchArm on a RPI 3+ b, but I am unable to make it use GL.
Setup:
Basic »AArch64« installation as described here
Package Installation:
wayland
...
- 193
1
vote
1
answer
3k
views
(Error trying to run qjackctl) libEGL warning: DRI2: failed to authenticate qt5ct: using qt5ct plugin
Running Raspbian installed with NOOBS. qjackctl is installed with all its dependencies using Synaptic. Just trying to run Guitarix on my Pi3 B+. I tried following the instructions in this solution, ...
- 11
0
votes
1
answer
2k
views
Confusion regarding getting started with OpenGL ES 2 on Raspberry Pi 3 B+
I am developing a 3D application for RPi 3 B+ using OpenGL ES. As I know there are plenty of tutorials and books but they are mostly for either OpenGL-ES 3.0, Android or iOS. I far as I know RPi 3 ...
- 144
1
vote
0
answers
32
views
Why do fbedev OGLES Draw Calls takes 30+us each?
When operating with the framebuffer OpenGL Drivers on my HTC Vive, performance is incredibly good on my Raspberry Pi 3B+ EXCEPT that every single draw call takes anywhere from 30-50us, regardless of ...
- 111
1
vote
0
answers
165
views
Raspberry Pi processing power [closed]
I've never worked with Raspberry Pi's, but I want to make some cute interactive shaders to put around the house and I was wondering if I could use a Raspberry Pi. I just wanted to know what one is ...
- 11
0
votes
2
answers
2k
views
glxgears do not work on my brand new Raspberry Pi 3, is that expected?
I got a Raspberry Pi 3 yesterday and installed it with the default Raspbian OS (a.k.a. Debian) and tested the glxgears program to see how good (or bad) the OpenGL/3D support was.
For some reasons, I ...
- 156
1
vote
1
answer
5k
views
Where is -lEGL -lGLESv2
I'm trying to install an OpenVG library, but when I start to make it I get the error.
...
gcc -L/opt/vc/lib -lEGL -lGLESv2 -ljpeg -shared -o libshapes.so oglinit.o libshapes.o
/usr/bin/ld: cannot ...
0
votes
1
answer
1k
views
Slow pixel drawing with SDL2 & experimental OpenGL driver
The code bellow just polling mouse events and draw lines between the previous and last mouse coordinates in case of left mouse button pressed down, nothing special and its using only fast integer ...
- 103
4
votes
1
answer
486
views
GTK Warnings and libGL errors when using x11-Forwarding on SSH
I'm having issues when working on my RaspberryPi via SSH on MobaXterm that I can't resolve by myself.
Appearantly there are some driver issues when using SSH and running programs that require the ...
- 153
2
votes
1
answer
9k
views
Fixing "failed to add service - already in use?" error programmatically
This is related to an earlier question "eglGetDisplay() fails on RaspBerry 3". On Raspbian Stretch with the full OpenGL driver, running hello_triangle or other GLES examples under /opt/vc/src/hello_pi/...
- 2,884
4
votes
1
answer
16k
views
Running Modern Opengl on raspberry pi
Is there any way to "enable" modern OpenGL on the Raspberry Pi (specifically the Raspberry Pi3)?
I would like to use C++ instead of Python, since I'm a lot more familiar with it. I know there is a ...
user76098
0
votes
1
answer
203
views
bcm_host_init() fails after using execl
I have a EGL app.
After downloading a executable update, I close the app and execute a execl.
The new instance crashes when calling bcm_host_init();
I checked, and the call to bcm_host_deinit(); is ...
- 245
5
votes
1
answer
2k
views
eglGetDisplay failed to add service on the raspberry pi 3
I tried to follow this tutorial. But when I execute it I have this error :
> * failed to add service - already in use ?
The memory split is equal to 192Mb and the Pi is connected by HDMI to a ...
- 51
0
votes
1
answer
4k
views
Display goes out of Range
We have a Raspberry Pi 2 running Rasbian Jessie with the OpenGL driver.
It is connected to a HDMI to DisplayPort Adaptor and an odd size touch screen display (1280x800).
We are running lightdm and ...
- 101
1
vote
0
answers
707
views
With the new openGL driver, can I make a resolution change permanent?
I am using the new openGL driver to run a WebGL app. It runs a lot smoother if I change resolution to 720p, which I can do with
xrandr -s 1280x720
This works perfect, but resets after reboot. I ...
- 31
1
vote
0
answers
205
views
Opengl use of stencil critically drops fps
I'm developing an all purpose graphic engine for the raspberry Pi and recently I added stencil testing to clip some excess polygons.
While the engine normally runs 18216 faces at 60fps, when I set ...
- 245
1
vote
1
answer
837
views
WebGL via remote desktop in latest Jessie on Raspberry Pi 3 [duplicate]
Hello Raspberry Pi enthusiasts!
I have a problem, I can't seem to get a webgl context running on a chromium browser instance using latest Jessie on a Raspberry pi 3.
I have enabled experimental GL ...
2
votes
2
answers
5k
views
Fatal Error: GLES2/gl2.h: No such file or directory
I'm trying to install Urho3D on RPi 3. (GPU = 768 MB)
I installed all the essential dependencies. All the steps went fine.
Until this error which occurred during the final make step:
[ 56%] Building ...
- 662
3
votes
1
answer
959
views
Minimal Kiosk GUI on PI
I'm trying to work out how to build a minimal OpenGL application on Raspian.
Once complete, I don't require command line or Window Manager access (outwith the Application itself) however will require ...
- 131
2
votes
1
answer
6k
views
Editing the settings that are available through raspi-config without using raspi-config
I have a Pi 2 and decided to check the new experimental OpenGL driver available in the latest version of Raspbian Jessie. Alas! the thing is really buggy. After enabling it my Pi, (through raspi-...
- 257
6
votes
2
answers
3k
views
How to display graphical text without X using C?
Using the Raspberry Pi 2 with the official 7" touchscreen, I want to display some high quality text without using an Xorg server. I'm looking for APIs that provide simple functions such as:
...
- 61