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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.

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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 ...
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429 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-...
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65 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 ...
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1answer
1k 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, ...
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0answers
17 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 ...
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0answers
565 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 ...
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0answers
153 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 ...
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0answers
453 views

How can I use MonoGame/OpenTK with good performance?

I'm making a system UI in C# OpenTK. Everything compiles correctly and it runs on the Raspberry Pi, but the performance is unbearable.I get less than one frame per second. I'm on a raspberry pi 2 (...
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0answers
64 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 ...
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117 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 ...
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31 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? ...
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1answer
340 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 ...
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291 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 ...
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263 views

Redshift on Raspbian Stretch

I'm trying to use Redshift on my Raspberry Pi, but running redshift -O 2500 gives the error Gamma ramp size too small: 0 Failed to start adjustment method randr. Trying next method... Using method `...
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1answer
108 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 ...
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1answer
1k 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 ...