FB2Image

Convert Frame Buffer to Image (png, bmp..)

Installation

Add this line to your application's Gemfile:

gem 'fb2image'

And then execute:

$ bundle

Or install it yourself as:

$ gem install fb2image

Usage

# require 'fb2image'

width  = 100
height = 20

# make gradation fb
line = (0...width).map {|x| [x * 255 / width, 0, 0, 0] }
fb =  ([line] * height).flatten

# initialize FB
fb = FB.new(width, height, fb, {
  :bits_per_pixel => 32,
  :red_shift      => 0,
  :green_shift    => 8,
  :blue_shift     => 16
})

# create png
fb.write_png("tmp/gradation.png")

# create bmp
fb.write_bmp("tmp/gradation.bmp")

Contributing

  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Create new Pull Request