NanoVG

Julia bindings for the NanoVG drawing library.

NanoVG is small antialiased vector graphics rendering library for OpenGL. It has lean API modeled after HTML5 canvas API. It is aimed to be a practical and fun toolset for building scalable user interfaces and visualizations.

Screenshot

Installation

NanoVG is a   Julia Language   package. To install NanoVG, open Julia's interactive session (known as REPL) and press ] key in the REPL to use the package mode, then type the following command:

pkg> add https://github.com/dylanxyz/NanoVG.jl

Note that NanoVG is not yet at the public registry, installation is done directly from this repo.

Documentation

In progress...

Basic Example

using GLFW
using NanoVG
using ModernGL

function main()
   title = "NanoVG Basic Example"
   width = 800
   height = 600

   window = GLFW.CreateWindow(width, height, title)
   @assert window.handle != C_NULL "Could not create a GLFW window 😢"

   GLFW.MakeContextCurrent(window)

   # Create the NanoVG context with the GL3 implementation
   NanoVG.create(NanoVG.GL3, antialiasing=true)

   while true
      if GLFW.WindowShouldClose(window) break end
      # get the framebuffer size
      width, height = GLFW.GetFramebufferSize(window)
      # get the window size
      winWidth, winHeight = GLFW.GetWindowSize(window)
      # dpr = device pixel ratio
      dpr = width / winWidth
      # set the viewport
      glViewport(0, 0, width, height)
      # create a new frame
      NanoVG.frame(winWidth, winHeight, dpr)
      # drawing functions should be called here
      
      # set the fill color
      fillcolor(rgb(128, 32, 56))
      # draw a filled circle at the center of the screen
      circle(width/2, height/2, 128, :fill)

      # render the frame to the screen
      NanoVG.render()

      GLFW.SwapBuffers(window)
      GLFW.PollEvents()
   end

   NanoVG.dispose()
   GLFW.DestroyWindow(window)
end

main()

License

This package is licensed under the MIT license.

NanoVG is licensed under the zlib license.

Additional licenses for assets:

• Roboto is licensed under the Apache License
• Entypo licensed under CC BY-SA 4.0.
• Noto Emoji licensed under SIL Open Font License, Version 1.1