Module: Cul::Image::Properties

Defined in:
lib/cul_image_props.rb,
lib/cul_image_props/image/properties.rb,
lib/cul_image_props/image/properties/exif.rb,
lib/cul_image_props/image/properties/types.rb,
lib/cul_image_props/image/properties/version.rb,
lib/cul_image_props/image/properties/exif/types.rb,
lib/cul_image_props/image/properties/exif/constants.rb

Defined Under Namespace

Modules: BigEndian, Exif, LittleEndian Classes: Base, Bmp, Gif, Jpeg, Namespace, Png, Tiff

Constant Summary collapse

MIME = 
{:bmp => 'image/bmp', :gif=>'image/gif', :jpg=>'image/jpeg', :png=>'image/png', :tif => 'image/tiff'}
EXIF = 
Namespace.new("http://www.w3.org/2003/12/exif/ns#","exif")
DCMI = 
Namespace.new("http://purl.org/dc/terms/","dcmi")
RESOLUTION_VALUES =

1 => Not absolute, 2=>inches,3=>centimeters

[1,2,3]
VERSION = 
"0.3.6"

Class Method Summary collapse

Class Method Details

.identify(src) ⇒ Object 



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# File 'lib/cul_image_props/image/properties.rb', line 9

def self.identify(src)
  if src.is_a? String
    src = open(src)
  end
  filesize = src.stat.size
  result = nil
  magic_bytes = ''
  buf = ''
  src.read(2,buf)
  magic_bytes << buf
  case magic_bytes.unpack('C*')
  when Cul::Image::Magic::BMP
    result = Cul::Image::Properties::Bmp.new(src)
  when Cul::Image::Magic::JPEG
    result = Cul::Image::Properties::Jpeg.new(src)
  end

  if result.nil?
    src.read(2,buf)
    magic_bytes << buf
    case magic_bytes.unpack('C*')
    when Cul::Image::Magic::TIFF_MOTOROLA_BE
      result = Cul::Image::Properties::Tiff.new(src)
    when Cul::Image::Magic::TIFF_INTEL_LE
      result = Cul::Image::Properties::Tiff.new(src)
    when Cul::Image::Magic::GIF
      result = Cul::Image::Properties::Gif.new(src)
    end
  end
  if result.nil?
    src.read(4,buf)
    magic_bytes << buf
    if magic_bytes.unpack('C*') == Cul::Image::Magic::PNG
      result = Cul::Image::Properties::Png.new(src)
    else
      puts "Unknown magic bytes: " + magic_bytes.unpack('H2H2H2H2H2H2H2H2').inspect
    end
  end
  return result
end

.version ⇒ Object 



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# File 'lib/cul_image_props.rb', line 40

def self.version
  Cul::Image::Properties::VERSION
end