Class: Teaas::Overlayer

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

Class Method Summary collapse

Class Method Details

.overlay(original_img, overlay_img, options = {}) ⇒ Object 



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# File 'lib/teaas/overlayer.rb', line 3

def self.overlay(original_img, overlay_img, options={})
  if options[:whitelisted_animation]
    overlay_animated_on_animated(original_img, overlay_img, options)
  elsif options[:static_on_animated]
    overlay_static_on_animated(original_img, overlay_img, options)
  else
    overlay_animated_on_static(original_img, overlay_img, options={})
  end
end

.overlay_animated_on_animated(img, overlay_img, options) ⇒ Object 



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# File 'lib/teaas/overlayer.rb', line 29

def self.overlay_animated_on_animated(img, overlay_img, options)
  overlay_img.each do |image|
    image.resize_to_fit!(img.columns, img.rows)
  end

  new_image = img
  new_overlay_img = overlay_img

  total_frames = img.length * overlay_img.length

  ((total_frames / img.length)-1).times do
    new_image += img
  end

  ((total_frames / overlay_img.length)-1).times do
    new_overlay_img += overlay_img
  end
  new_image.gravity = options[:gravity] ? options[:gravity] : Magick::SouthGravity
  new_image = new_image.composite_layers(new_overlay_img)

  new_image
end

.overlay_animated_on_static(original_img, overlay_img, options) ⇒ Object 



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# File 'lib/teaas/overlayer.rb', line 52

def self.overlay_animated_on_static(original_img, overlay_img, options)
  image = Magick::ImageList.new
  img = Teaas::Helper.prepare_for_animation(original_img)
  overlay_img.each do |image|
    image.resize_to_fit!(img.columns, img.rows)
  end
  image << img

  image.gravity = options[:gravity] ? options[:gravity] : Magick::SouthGravity
  image = image.composite_layers(overlay_img)

  image
end

.overlay_static_on_animated(img, overlay_img, options) ⇒ Object 



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# File 'lib/teaas/overlayer.rb', line 13

def self.overlay_static_on_animated(img, overlay_img, options)
  overlay_resize = options[:overlay_resize] || 1
  image = Magick::ImageList.new
  overlay_img.each do |image|
    image.resize_to_fit!(img.columns * overlay_resize, img.rows * overlay_resize)
  end
  gravity = options[:gravity] || Magick::SouthGravity

  overlay_img.gravity = gravity
  img.each do |i|
    i.composite!(overlay_img, gravity, Magick::OverCompositeOp)
  end

  img
end