Module: BMP2SSD1306

Defined in:
lib/bmp2ssd1306.rb,
lib/bmp2ssd1306/version.rb

Constant Summary collapse

VERSION = 
'0.1.0'

Class Method Summary collapse

Class Method Details

.convert(path) ⇒ Object 



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# File 'lib/bmp2ssd1306.rb', line 6

def convert(path)
  buff = ''

  image = Magick::Image.read(path).first
  cols = image.columns
  rows = image.rows

  (0...rows).step(8) do |row|
    (0...cols).each do |col|
      byte = []
      (0...8).each do |cur|
        pixel = image.pixel_color(col, row + cur)
        bit = pixel.red > 0 && pixel.green > 0 && pixel.blue > 0 ? 0 : 1

        byte << bit
      end
      buff << [byte.join].pack('b*')
    end
  end

  buff
end