Module: ReallySimpleCaptcha::Captcha::PlainCaptcha

Includes:
ActiveSupport::Configurable
Defined in:
lib/really_simple_captcha/captcha/plain_captcha.rb

Defined Under Namespace

Modules: ControllerHelpers, ViewHelpers

Constant Summary collapse

DEFAULT_OPTIONS = 
{
  width: 120,
  height: 40,
  wave_amplitude: 4.0,
  wave_length: 60.0,
  implode_amount: 0.3,
  pointsize: 22,
  text_fill: 'darkblue',
  background_color: 'white'
}

Class Method Summary collapse

Class Method Details

.configure {|config| ... } ⇒ Object

Yields:

  • (config) 


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# File 'lib/really_simple_captcha/captcha/plain_captcha.rb', line 34

def self.configure(&block)
  yield config
end

.generate_image(captcha_text, args = {}) ⇒ Object 



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# File 'lib/really_simple_captcha/captcha/plain_captcha.rb', line 65

def self.generate_image(captcha_text, args={})
  options = DEFAULT_OPTIONS.merge(args)

  image = ::Magick::Image.new(options[:width], options[:height]) do
    self.background_color = options[:background_color]
  end

  text = ::Magick::Draw.new do
    self.pointsize = options[:pointsize]
    self.gravity = ::Magick::CenterGravity
    self.fill = options[:text_fill]
  end

  text.annotate(image, 0, 0, 0, 0, captcha_text)

  image = image.implode(options[:implode_amount]).wave(options[:wave_amplitude], options[:wave_length])

  Base64.strict_encode64(image.to_blob { self.format = 'GIF' })
end