I’m excited to share CrImage , a comprehensive image processing library written entirely in Crystal with zero external dependencies. What is it? A complete image toolkit that handles everything from basic format conversion to advanced effects, text rendering, and even QR code generation — all in pur…

Wow, this looks very useful. And it’s a huge project! :heart_eyes: Doing all of this with zero dependencies requires lots of homemade implementations. Congrats on writing such a big codebase :tada:

Thanks @straight-shoota , I had been working on it on and off since past 2+ years.

This is awesome, a few days ago I was wondering if there was a good image library without fooling around with image magick. Will for sure keep this in mind whenever I get that next project with image manipulation.

Awesome! I expect I will be using this in half a dozen projects in the next week :slight_smile:

This looks positively amazing. I’m much rather using this than depending on Cairo to render text. Some assorted thoughts: API: The API is based on using files and/or IO as the source and target. In many cases that is great and what you want, but there are some cases where it is not so great - for …

API / Buffer access: CrImage does support direct buffer access: # Create from existing buffer img = CrImage::RGBA.new(pixel_bytes, stride, CrImage.rect(0, 0, width, height)) # Access raw pixel buffer raw = img.pix # Returns Bytes Layout is row-major, RGBA order. For GPU interop you’d need to …

CrImage::RGBA.new(pixel_bytes, stride, CrImage.rect(0, 0, width, height)) Right, that is the one I found. A little unwieldy, as the only things really needed is `pixel_bytes`, `width` and `height` (and the knowledge of what the byte size of RGBA is, to calculate the stride). But perhaps all that …

> A little unwieldy Fair point. A convenience constructor like `CrImage::RGBA.from_buffer(bytes, width, height)` that calculates stride internally would be cleaner. Noted. > does R have bit 0-7 from the left or from the right? CrImage uses RGBA order: `pix[0]=R, pix[1]=G, pix[2]=B, pix[3]=A`. Sta…

First: tartrazine uses this to generate images with highlighted code [image] Release Release v0.19.3 · ralsina/tartrazine [0.19.3] - 2026-01-02 🚜 Refactor Add ImageFormatter base class and Crimage-based formatters Bump Release v0.19.3

Gosh this is cool! I hope I’d be able to check it out when I get to rewrite the GUI part of my project (can it do 60FPS, at least in theory?). Even though right now my thing is engineered around vector graphics, I’m willing to change that, seeing the state of things in that land! Freetype stuff look…

Announcing CrImage - Pure Crystal Image Processing Library - #10 by straight-shoota - News

Topic		Replies	Views	Activity
RFC: Standard Image Types in Stdlib Community rfc	27	1101	February 14, 2026
CrystalVips - Crystal bindings for the libvips image processing library News	8	1173	December 13, 2023
PNG implementation in Crystal Community	4	704	March 12, 2024
Generate a simple digits captcha image Help & Support	5	358	June 15, 2025
Doing Raytracer in Crystal Community	86	4839	January 18, 2026

RFC: Standard Image Types in Stdlib

Community

rfc

27

1101

February 14, 2026

CrystalVips - Crystal bindings for the libvips image processing library

News

8

1173

December 13, 2023

PNG implementation in Crystal

Community

4

704

March 12, 2024

Generate a simple digits captcha image

Help & Support

5

358

June 15, 2025

Doing Raytracer in Crystal

Community

86

4839

January 18, 2026

Announcing CrImage - Pure Crystal Image Processing Library

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