Class: Magick::Image

Inherits:
Object
  • Object
show all
Defined in:
lib/iphone_polaroid.rb

Instance Method Summary collapse

Instance Method Details

#exif ⇒ Object 



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# File 'lib/iphone_polaroid.rb', line 25

def exif
  @exif ||= EXIFR::JPEG.new(StringIO.new(to_blob))
end

#lat ⇒ Object 



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# File 'lib/iphone_polaroid.rb', line 29

def lat
  unless instance_variable_defined?(:@lat)
    lat = exif.gps_latitude
    unless lat.nil?
      lat = lat[0] + lat[1] / 60.0 + lat[2] / 3600.0
      lat *= -1 if exif.gps_longitude_ref == 'S'
    end
    @lat = lat
  end
  @lat
end

#lon ⇒ Object 



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# File 'lib/iphone_polaroid.rb', line 41

def lon
  unless instance_variable_defined?(:@lon)
    lon = exif.gps_longitude
    unless lon.nil?
      lon = lon[0] + lon[1] / 60.0 + lon[2] / 3600.0
      lon *= -1 if exif.gps_longitude_ref == 'W'
    end
    @lon = lon
  end
  @lon
end

#polaroid(options = {}) ⇒ Object 



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# File 'lib/iphone_polaroid.rb', line 53

def polaroid(options={})
  o = {
    :photo_width => 216,
    :photo_height => 225,
    :border_color => '#e8eef3',
    :border_width => 18,
    :bottom_border_width => 63,

    :text_fill => '#000000',
    :text_font => 'Amaze-Normal',
    :text_gravity => Magick::SouthGravity,
    :text_size => 20,
    :text_stroke => 'transparent',

    :amplitude => 0.01,
    :shadow_color => 'gray75',
    :shadow_blur_radius => 0,
    :shadow_blur_sigma => 3,
    :shadow_composite_y => 5,
    :rotate => -5,
    }.merge(options)

  img = copy

  img.resize_to_fill!(o[:photo_width], o[:photo_height])

  border = Magick::GradientFill.new(0, 0, 0, 0, o[:border_color],
    o[:border_color])
  border = Magick::Image.new(img.columns + o[:border_width] * 2,
    img.rows + o[:border_width] + o[:bottom_border_width], border)
  img = border.composite(img, Magick::NorthWestGravity, o[:border_width],
    o[:border_width], Magick::OverCompositeOp)

  caption = exif.date_time.strftime('%m/%d/%Y').sub(/(^|\/)0/, '\1')

  unless lat.nil? or lon.nil?
    caption =
      "#{caption} #{IPhonePolaroid.lat_lon_to_city_state(lat, lon)}"
  end

  text = Magick::Draw.new
  text.annotate(img, 0, 0, 0, o[:border_width], caption) {
    self.fill = o[:text_fill]
    self.font = o[:text_font]
    self.gravity = o[:text_gravity]
    self.pointsize = o[:text_size]
    self.stroke = o[:text_stroke]
  }

  img.background_color = 'none'
  amplitude = img.columns * o[:amplitude]
  wavelength = img.rows  * 2
  img.rotate!(90)
  img = img.wave(amplitude, wavelength)
  img.rotate!(-90)

  shadow = img.flop
  shadow = shadow.colorize(1, 1, 1, o[:shadow_color])
  shadow.background_color = 'white'
  shadow.border!(10, 10, 'white')
  shadow = shadow.blur_image(o[:shadow_blur_radius], o[:shadow_blur_sigma])
  img = shadow.composite(img, -amplitude / 2, o[:shadow_composite_y],
    Magick::OverCompositeOp)
  img.rotate!(o[:rotate])
  img.trim!

  img

end