mruby bindings for nanovg
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README.md

mruby-nanovg (WIP)

Mruby Bindings for nanovg.

mrb_config.rb

MRuby::Build.new do |conf|
  #toolchain :gcc
  toolchain :clang # I used clang for testing, you can use gcc

  conf.gembox 'default'
  conf.gem github: 'IceDragon200/mruby-glew'
  conf.gem github: 'IceDragon200/mruby-glfw3'
  conf.gem github: 'IceDragon200/mruby-nanovg'
  conf.gem github: 'take-cheeze/mruby-clang-plugin' # not required, just makes debugging nicer

  conf.cc do |cc|
    cc.include_paths << 'path/to/nanovg/src'
  end

  conf.linker do |linker|
    linker.library_paths << 'path/to/nanovg/build'
    linker.libraries << 'GL'     # for mruby-nanovg and glfw
    linker.libraries << 'GLEW'   # for mruby-glew
    linker.libraries << 'glfw'   # for mruby-glfw3
    linker.libraries << 'nanovg' # for mruby-nanovg
  end
end

Requirements:

In order to build and use the gem, the following gems are required

If you wish to try the examples, you'll need mruby-glfw3

Defines

Name Description
MRUBY_NANOVG_GL2 Uses NANOVG_GL2_IMPLMENTATION
MRUBY_NANOVG_GL3 Uses NANOVG_GL3_IMPLMENTATION
MRUBY_NANOVG_GLES2 Uses NANOVG_GLES2_IMPLMENTATION
MRUBY_NANOVG_GLES3 Uses NANOVG_GLES3_IMPLMENTATION

Docs

# to generate docs locally, you'll need c-ruby, rake and yard installed.
rake docs

Gotchas

# text_break_lines is a tricky function to wrap, instead I've opted to handle the row buffering intenrally and yield the params back to the user
context.text_break_lines text, width do |row_string, row_width, min_x, max_x|
  # do stuff with the row_string
end

context.text_glyph_positions(x, y, text) #=> [[x, min_x, max_x]...]

TODO:

  • Bind
    • Nanovg::Context.text_glyph_positions
    • Nanovg::Context.text_break_lines
    • everything else
  • Tests
    • Nanovg
    • Nanovg::Color
    • Nanovg::Context
    • Nanovg::Paint
    • Nanovg::Transform
  • Samples / Examples
    • Port original nanovg ogl2 example