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Alexandru Ică @vg_head

Drawing things on the screen @Rayonapp

Joined January 2022
  • Tweets 275
  • Following 362
  • Followers 77
11 Photos and videos
Alexandru Ică retweeted
Eurora Labs@euroralabs
Apr 27
Eurora Desktop already has the context. No copy and paste. No context-setting. No explaining. Just ask. One assistant. Every browser on every desktop across macOS, Windows and Linux. Articles. Videos. Docs. Threads. Just ask away
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Great post on spectral rendering, and a wonderful blog in general: momentsingraphics.de/Spectra…
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Alexandru Ică retweeted
Ben Visness@its_bvisness
28 Oct 2025
The write-up of my new graph layout algorithm for SpiderMonkey is now live. We built a custom layout algorithm for JS and WASM that follows the structure of the source code. No more spaghetti nightmares from Graphviz, and thousands of times faster.
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One thing I love about digging into rabbit holes such as PDF parsing is stumbling upon phrases like "schizophrenic PDF files".
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The source is a highly interesting read: hal.science/hal-02143706/fil…
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Fun fact: new ICC profiles can contain embedded programs in them that specify color space transforms. All operators describe operations performed on the stack, à la Forth.
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"calculatorElement" and Annex F in this doc: color.org/specification/ICC.…
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I wrote a new post about one of the weirdest optimizations I've done at one of my previous jobs. Hopefully it's an enjoyable read. :) minus-ze.ro/posts/unintuitiv…

Unintuitive Optimization For Performing Paths Union

There is a weird optimization possible when one wants to compute the contour of a lot of vector paths. Here I try to explain why it works.

minus-ze.ro
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The code for computing winding for a quadratic Bézier can be simplified a lot by dealing with monotonic quadratics only. Testing if a sample lies to the left/right of the curve becomes extremely cheap in that case.
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shadertoy.com/view/433czr
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"Quadratic Approximation of Cubic Curves" contains a neat method of representing one cubic Bézier as two C1-continuous quadratics, maintaining tangents at the endpoints. Combining that with a heuristic for how many times to split the source curve gives excellent results.
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Demo: editor.p5js.org/AlexandruIca… Original: ttnghia.github.io/posts/quad…
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I ported my demo to Rust to see if I can make things faster. The goals is to perform queries for arbitrary points and arbitrary vector paths, as fast as possible. I'll try to write everything SIMD-friendly.
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I've implemented non-zero fill for quadratic curves without flattening them. Should be numerically robust but I haven't tested it too thoroughly yet. Very happy with the results so far. Coverage is computed per pixel individually.
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Demo: editor.p5js.org/AlexandruIca…
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Today I remembered that C syntax can be funny beyond typedefs: int some_function(int input[static 100]); This is valid C. And it tells the compiler that `input` has at least 100 elements.
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I'm reading some older blog posts regarding boolean path ops, and I found a great paper in the process. It's short, to the point, and contains intuitive explanations and figures. “Efficient clipping of arbitrary polygons” by Günther Greiner and Kai Hormann.
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inf.usi.ch/hormann/papers/Gr…
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Is there any library that can be used to generate PDFs that contain transparent images? Ideally with a transparency mask. PDFLib and iText seem like valid options, but I'm wondering if there's any open-source alternative for this.
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ReportLab can do this, using an undocumented mask parameter 'auto' for drawImage, which I found in a random post on SO posted about 9 years ago.
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