Class: Magick::Image

Inherits:
Object
  • Object
show all
Defined in:
lib/hornetseye-rmagick/image.rb

Instance Method Summary collapse

Instance Method Details

#to_multiarray ⇒ Object 



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# File 'lib/hornetseye-rmagick/image.rb', line 60

def to_multiarray
  case image_type
  when BilevelType, GrayscaleType, GrayscaleMatteType
    case depth
    when 32
      to_type Hornetseye::UINT
    when 16
      to_type Hornetseye::USINT
    when 1, 8
      to_type Hornetseye::UBYTE
    else
      Kernel.raise "Conversion for grayscale image with depth #{depth} not " +
        "implemented"
    end
  when PaletteType, PaletteMatteType, TrueColorType, TrueColorMatteType
    case depth
    when 32
      to_type Hornetseye::UINTRGB
    when 16
      to_type Hornetseye::USINTRGB
    when 8
      to_type Hornetseye::UBYTERGB
    else
      Kernel.raise "Conversion for colour image with depth #{depth} not " +
        "implemented"
    end
  else
    Kernel.raise "Unknown image type #{image_type.inspect}"
  end
end

#to_type(typecode) ⇒ Object 



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# File 'lib/hornetseye-rmagick/image.rb', line 20

def to_type( typecode )
  case typecode
  when Hornetseye::UBYTE
    format = 'I'
    pixel_type = CharPixel
  when Hornetseye::USINT
    format = 'I'
    pixel_type = ShortPixel
  when Hornetseye::UINT
    format = 'I'
    pixel_type = IntegerPixel
  when Hornetseye::SFLOAT
    format = 'I'
    pixel_type = FloatPixel
  when Hornetseye::DFLOAT
    format = 'I'
    pixel_type = DoublePixel
  when Hornetseye::UBYTERGB
    format = 'RGB'
    pixel_type = CharPixel
  when Hornetseye::USINTRGB
    format = 'RGB'
    pixel_type = ShortPixel
  when Hornetseye::UINTRGB
    format = 'RGB'
    pixel_type = IntegerPixel
  when Hornetseye::SFLOATRGB
    format = 'RGB'
    pixel_type = FloatPixel
  when Hornetseye::DFLOATRGB
    format = 'RGB'
    pixel_type = DoublePixel
  else
    Kernel.raise "Cannot convert to typecode #{typecode}"
  end
  Hornetseye::MultiArray.import typecode,
    export_pixels_to_str( 0, 0, columns, rows, format, pixel_type ),
    columns, rows
end