Cairo-mojo: Cairo bindings + high-level 2D rendering API for Mojo

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I’ve been working on cairo-mojo, a library that wraps Cairo graphics library into Mojo with both low-level bindings and a more ergonomic, safe API.
It can be a building block for plotting, visualization stack as a rendering backend for vector graphics in svg, png, pdf.

Repo: https://github.com/MoSafi2/cairo-mojo

What it provides

  • FFI bindings to libcairo (auto-generated)
  • High-level wrappers (Context, ImageSurface Pattern Paths , etc.) inspired by Pycairo. Almost all Cairo features are safely wrapped
  • Runtime loader for dynamic libcairo discovery on Linux and OSX

Quick example

def main() raises:

var surface = ImageSurface(width=256, height=256)
var ctx = Context(surface)

ctx.set_source_rgb(0.96, 0.97, 0.99); ctx.paint() # background
ctx.set_source_rgb(0.0, 0.0, 0.0) # card
ctx.rectangle(40.0, 40.0, 176.0, 176.0)
ctx.fill()
ctx.set_source_rgb(0.25, 0.55, 0.95) # circle
ctx.arc(128.0, 110.0, 40.0, 0.0, 6.28318)
 ctx.fill()
ctx.set_source_rgb(0.92, 0.22, 0.22) # accent bar
ctx.rectangle(72.0, 160.0, 112.0, 14.0)
ctx.fill()

surface.write_to_png("simple_example.png")

simpleexample
simpleexample256×256 1.32 KB

Check out 11 additional examples in the examples directory ranging from simple to advanced use cases.

Use it in your project

pixi add -g https://github.com/MoSafi2/cairo-mojo cairo-mojo

Modular community channel addition is coming soon.

Feedback on API design, ergonomics, is very welcome.