#libobscura — Public Fediverse posts

Remember #libobscura ?

The project didn't attract a huge community, but it did teach me stuff so obscure that few people apart from the authors understand it.

So I started writing it down, for everyone's benefit.

If you had questions about #DMABUF, I try to explain it on my #blog :

https://dorotac.eu/posts/DMABUF/

Thanks to all the people who explained it to me. Some parts are really confusing.

(Please report mistakes.)

#linux #kernel #graphics #camera

#FOSSonMobile on #FOSDEM

libobscura: Cameras are STILL difficult by @dcz
https://fosdem.org/2025/schedule/event/fosdem-2025-6184-libobscura-cameras-are-still-difficult/

https://codeberg.org/libobscura/libobscura
#libobscura

Irregular reminder: floating point calculations are not exact.

Take your program to a different #hardware and your tests may start failing:

https://codeberg.org/libobscura/libobscura/src/branch/master/crates/conv/tests/convtest.rs#L40

https://codeberg.org/libobscura/libobscura/actions/runs/30#jobstep-7-431

#fpu #float #floatingpoint #precision #libobscura

Working on #libobscura today.

#OpenGL , #EGL , #glium , #glutin , #Rust , #v4l2 .

After 2 weeks of effort, the #GPU decoder COMPILES!

...The screen is green.

But hey, I actually know how to debug this :D It's almost as if 10 years of #debugging and #ReverseEngineering paid off!

Remember #libobscura ?

I applied to have the project as part of #freedesktop_org @XOrgFoundation .

I'd like to start publishing docs and sources ASAP!

So can I get some acks from people who know about #cameras ?

@libcamera #linux #linuxmobile #v4l2 #opensource

#Coding #OpenGL for #libobscura right now.

Computers need to convert those #Bayer or YUV #camera streams to RGB quickly to present them!

I'm just converting my old code to #rust, but it was enough to remind me why I hate the OpenGL + #EGL + #GBM combo. APIs with implicit global variables can get lost.

Thankfully, I'm nearly done and can go back to shaders and algorithms :-) but using GLES 1.2 (the #Librem5 can't do anything better ;_; )

#vivante #linux

#Coding #OpenGL for #libobscura right now.

Computers need to convert those #Bayer or YUV #camera streams to RGB quickly to present them!

I'm just converting my old code to #rust, but it was enough to remind me why I hate the OpenGL + #EGL + #GBM combo. APIs with implicit global variables can get lost.

Thankfully, I'm nearly done and can go back to shaders and algorithms :-) but using GLES 1.2 (the #Librem5 can't do anything better ;_; )

#vivante #linux

#Coding #OpenGL for #libobscura right now.

Computers need to convert those #Bayer or YUV #camera streams to RGB quickly to present them!

I'm just converting my old code to #rust, but it was enough to remind me why I hate the OpenGL + #EGL + #GBM combo. APIs with implicit global variables can get lost.

Thankfully, I'm nearly done and can go back to shaders and algorithms :-) but using GLES 1.2 (the #Librem5 can't do anything better ;_; )

#vivante #linux

#Coding #OpenGL for #libobscura right now.

Computers need to convert those #Bayer or YUV #camera streams to RGB quickly to present them!

I'm just converting my old code to #rust, but it was enough to remind me why I hate the OpenGL + #EGL + #GBM combo. APIs with implicit global variables can get lost.

Thankfully, I'm nearly done and can go back to shaders and algorithms :-) but using GLES 1.2 (the #Librem5 can't do anything better ;_; )

#vivante #linux

#Coding #OpenGL for #libobscura right now.

Computers need to convert those #Bayer or YUV #camera streams to RGB quickly to present them!

I'm just converting my old code to #rust, but it was enough to remind me why I hate the OpenGL + #EGL + #GBM combo. APIs with implicit global variables can get lost.

Thankfully, I'm nearly done and can go back to shaders and algorithms :-) but using GLES 1.2 (the #Librem5 can't do anything better ;_; )

#vivante #linux

The #Librem5 can run #egui :)

(It's an immediate mode #gui toolkit for #Rust .)

Here's a demo of an #opengl triangle.

This will be needed for a proof-of-concept #camera application using #libobscura (thank you @PrototypeFund for the funding!)

#linux #v4l2

For anyone who is too small-brained to develop #libcamera, I started an unofficial Matrix channel to discuss the need for ergonomic alternative:

#libobscura:chatwave.org

https://matrix.to/#/#libobscura:chatwave.org

#v4l2 #linux #driver #kernel #ergonomy #graphics #camera #video

For anyone who is too small-brained to develop #libcamera, I started an unofficial Matrix channel to discuss the need for ergonomic alternative:

#libobscura:chatwave.org

https://matrix.to/#/#libobscura:chatwave.org

#v4l2 #linux #driver #kernel #ergonomy #graphics #camera #video

For anyone who is too small-brained to develop #libcamera, I started an unofficial Matrix channel to discuss the need for ergonomic alternative:

#libobscura:chatwave.org

https://matrix.to/#/#libobscura:chatwave.org

#v4l2 #linux #driver #kernel #ergonomy #graphics #camera #video

For anyone who is too small-brained to develop #libcamera, I started an unofficial Matrix channel to discuss the need for ergonomic alternative:

#libobscura:chatwave.org

https://matrix.to/#/#libobscura:chatwave.org

#v4l2 #linux #driver #kernel #ergonomy #graphics #camera #video

For anyone who is too small-brained to develop #libcamera, I started an unofficial Matrix channel to discuss the need for ergonomic alternative:

#libobscura:chatwave.org

https://matrix.to/#/#libobscura:chatwave.org

#v4l2 #linux #driver #kernel #ergonomy #graphics #camera #video