Peter Hellberg
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c7.se
Peter Hellberg
@c7.se
73 followers 61 following 30 posts
Go and Zig developer, Valheim player, Bread baker.

https://c7.se
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c7.se
On November 29, I’ll be at Zig Day Stockholm. I look forward to meeting other Zig enthusiasts there.

zig.day/europe/stock...
Zig Day Stockholm #0
Zig Days are single-day collaborative programming events
zig.day
November 20, 2025 at 7:05 AM
c7.se
I just published c7.se/reviving-a-q... where I document the experience of getting my old web server up and running again.
Back of a Dell OptiPlex NX1 300+ “Net PC” under my desk.
September 10, 2025 at 9:56 AM
c7.se
It is a bit fiddly, but it is possible to run two instances of the @fireflyzero.bsky.social emulator, and have their respective inputs synced.
Two instances of firefly-emulator running my peter.input-test rom, in sync.
February 19, 2025 at 1:40 PM
c7.se
It seems like the current @fireflyzero.bsky.social emulator is consuming >100% CPU doing nothing really, which is a bit unfortunate.

Let's hope it can be tweaked somewhat to work better on low end hardware.

(like my P1000 GPU)
February 18, 2025 at 11:46 AM
c7.se
I've pushed fixes to the `ff.Angle` type, wrote some test cases for it, and also a small example where I'm using `ff.drawArc` to draw some rotating colors.

Source code available from play.c7.se/ff/rot/
ff.Arc showing eight 45 degree slices colored from the default Sweetie 16 palette. ff.Arc showing eight 45 degree slices colored from the default Sweetie 16 palette.
February 17, 2025 at 11:29 PM
c7.se
Really nice how convenient @github.com makes it to have static content published on Pages (`.github/workflows/static.yml` was generated for me).

I am now publishing generated @ziglang.bsky.social documentation for `ff` on peterhellberg.github.io/ff/ when I push changes to the module. ⚡
February 17, 2025 at 4:57 PM
c7.se
Fixed the getRandom() issue in `ff`, and naturally had to test it out by writing something using that function.

Source code available from play.c7.se/ff/rng/
Random circles using the https://lospec.com/palette-list/lost-century palette Random circles using the https://lospec.com/palette-list/lost-century palette Random circles using the https://lospec.com/palette-list/lost-century palette
February 17, 2025 at 12:14 PM
c7.se
Ported another WASM-4 thing to @fireflyzero.bsky.social

For this one I got to do silly things like;

if (self.color == .white) {
for (&bytes) |*byte| {
byte.* = ~byte.*;
}
}

img[0x6..0xE].* = bytes;

Source code available from play.c7.se/ff/fp8x8/
Other Other Symbols Nature
February 16, 2025 at 9:57 PM
c7.se
Just ported a small WASM-4 demo I made a while back to
@fireflyzero.bsky.social using @ziglang.bsky.social, fun stuff 🔥

Updated my `ff` module with conveniences such as:

const pal: ff.Palette = .{
.black = 0x000000,
.gray = 0x292929,
.white = 0xffffff,
.orange = 0xf7a41d,
};
February 16, 2025 at 5:28 PM
c7.se
I have now published github.com/peterhellber... (and github.com/peterhellber...) which makes it trivial for me to get started working on @fireflyzero.bsky.social apps, maybe someone else finds a use for it as well ✨
GitHub - peterhellberg/ff-init: Initialize a Zig ⚡ Firefly Zero app project
Initialize a Zig ⚡ Firefly Zero app project. Contribute to peterhellberg/ff-init development by creating an account on GitHub.
github.com
February 15, 2025 at 1:31 AM
c7.se
Today v0.5.1 of the @fireflyzero.bsky.social emulator was released, which means I could finally use it :) (due to me being on Pop!_OS 22.04)

What better then to start working on some @ziglang.bsky.social code to make it convenient for me to start hacking on some apps.
Firefly Zero App displaying the Zig logo
February 15, 2025 at 12:04 AM
c7.se
Started working on a rudimentary @fireflyzero.bsky.social emulator in Go using Wazero, Ebiten and my Gfx-library.

- wazero.io
- ebitengine.org
- github.com/peterhellber...
February 5, 2025 at 8:15 PM
c7.se
The @fireflyzero.bsky.social ROM file format is a Zip archive compressed with Zstandard.

For fun I wrote a small CLI in Go to extract these using the lovely compress module by @klauspost.bsky.social

(Note that you could just as well use `firefly_cli import `)

gist.github.com/peterhellber...
A quick and dirty decompressor for Firefly Zero carts (Which are Zip files compressed using ZSTD)
A quick and dirty decompressor for Firefly Zero carts (Which are Zip files compressed using ZSTD) - unzipzstd.go
gist.github.com
February 5, 2025 at 2:44 PM
c7.se
This week I've looked at a few vector databases, and found Qdrant to be quite pleasant to get started with.

(Qdrant in combination with Ollama and the LangChainGo library for some small experiments)

- qdrant.tech/documentatio...
- ollama.com
- github.com/tmc/langchai...

#golang
January 24, 2025 at 12:36 PM
c7.se
Wrote some code to generate a list of the 24 most downloaded 4 color palettes on Lospec.

Then started hacking on a little #wasm4 cart in #Zig

You can follow along over at:

play.c7.se/w4-advent/

(Change day with ↕️)
December 4, 2024 at 9:01 PM
c7.se
A neat thing with Typst is that its compiler has a WebAssembly host (in which you can load plugins for use in your .typ files)

I wrote a library to make building such plugins in Zig ⚡️pretty convenient:

github.com/peterhellber...
GitHub - peterhellberg/typ: A small Zig ⚡ module, as a convenience for me when writing WebAssembly plugins for Typst
A small Zig ⚡ module, as a convenience for me when writing WebAssembly plugins for Typst - peterhellberg/typ
github.com
November 18, 2024 at 3:08 PM
c7.se
@brtkdotse.bsky.social Testar om jag kan posta trots att bsky tycker att mitt handle är invalid.
October 18, 2023 at 1:19 PM