Class: GallerySync::ImageScaler

Inherits:

Object

• Object
• GallerySync::ImageScaler

Defined in:

lib/gallery_sync/gallery_sync.rb

Class Method Summary

• .scale_image(image) ⇒ Object

Class Method Details

.scale_image(image) ⇒ Object

Parameters:

• image —

  an in-memory image

# File 'lib/gallery_sync/gallery_sync.rb', line 452

def self.scale_image(image)
  r = {}

  magick_image = Magick::Image.from_blob(image).first
  magick_image.auto_orient!

  # thumb (strip exif metadata to decrease size)
  # ^ means minimum size
  r[:thumb] = magick_image.change_geometry('100x100^') { |w,h,img|
    resized = img.resize(w,h)
    if(w > h)
      # landscape
      resized.crop((w-h)/2,0,h,h)
    else
      # portrait
      resized.crop(0,0,w,w)
    end
  }.strip!.to_blob {
    self.quality = 80
  }

  # medium
  r[:medium] = magick_image.change_geometry('460x460') { |cols, rows, img|
    img.resize(cols, rows)
  }.to_blob { self.quality = 85 }

  # full
  r[:full] = image
  return r
end