Class: CArray

Inherits:
Object
  • Object
show all
Defined in:
lib/autoload/autoload_io_rmagick.rb,
lib/io/rmagick.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.load_image(file, map = "RGBO", data_type = nil) ⇒ Object 



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# File 'lib/io/rmagick.rb', line 94

def self.load_image (file, map="RGBO", data_type = nil)
  img = Magick::Image.read(file).first
  rows, cols = img.rows, img.columns
  unless data_type
    case img.quantum_depth
    when 8
      data_type = CA_UINT8
    when 16
      data_type = CA_UINT16
    when 32
      data_type = CA_UINT32
    end
  end
  case map.size
  when 1
    out = CArray.new(data_type, [rows, cols])
  else
    out = CArray.new(data_type, [rows, cols, map.size])
  end
  img.export_pixels_to_ca(out, map)
  return out
end

Instance Method Details

#display_image(map = "RGBO", ch = nil) ⇒ Object 



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# File 'lib/io/rmagick.rb', line 143

def display_image (map="RGBO", ch=nil)
  to_image(map, ch).display
end

#save_image(file, map = "RGBO", ch = nil) ⇒ Object 



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# File 'lib/io/rmagick.rb', line 138

def save_image (file, map="RGBO", ch=nil)
  to_image(map, ch).write(file)
  return nil
end

#to_image(map = "RGBO", ch = nil) ⇒ Object 



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# File 'lib/io/rmagick.rb', line 117

def to_image (map="RGBO", ch=nil)
  img = Magick::Image.new(dim1, dim0)
  case data_type
  when CA_FIXLEN
    img.import_pixels_from_ca(self, map)
  else
    case rank
    when 2
      map = "I"
      ca = self[:%, :%, 1]
    when 3
      unless ch
        ch = Array.new(map.size){|i| i}
      end
      ca = self[nil,nil,CA_INT(ch)]
    end
    img.import_pixels_from_ca(ca, map)
  end
  return img
end