Class: ZXing::RMagick::Image

Inherits:
Object
  • Object
show all
Includes:
Image
Defined in:
lib/zxing/rmagick/image.rb

Constant Summary collapse

LuminanceSource = 
ZXing::FFI::Common::GreyscaleLuminanceSource

Instance Attribute Summary

Attributes included from Image

#native

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Image

#initialize

Class Method Details

.read(argument) ⇒ Object 



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# File 'lib/zxing/rmagick/image.rb', line 15

def self.read argument
  img = nil

  if argument.is_a? String
    if argument.encoding.name == Encoding.aliases['BINARY']
      begin
        img = Magick::Image.from_blob(argument)[0]
      rescue Exception => e
        # Because 'BINARY' is just an alias for ASCII-8BIT, if treating the
        # argument as image blob failed, we should continue on and try treat
        # the argument like a regular string.
      end
    end
  end

  if img.nil?
    require 'uri'
    require 'pathname'

    uri = URI.parse(argument.respond_to?(:path) ? argument.path : argument.to_s)

    if uri.scheme.nil?
      uri.scheme = "file"
      uri.path = Pathname.new(uri.path).realpath.to_s
    end

    begin
      img = case uri.scheme
              when "file"; Magick::Image.read(uri.path)[0]
              else; Magick::Image.from_blob(fetch(uri).body)[0]
            end
    rescue Exception => e
      raise ZXing::BadImageException.new e.message
    end
  end

  # p Magick::Magick_version
  # p img.colorspace
  img.colorspace = Magick::RGBColorspace
  # p img.colorspace

  if false
    (8..8).each do |j|
      (8..8).each do |i|
        p i,j
        pixel = img.pixel_color(i,j)
        r = pixel.red&0xff
        g = pixel.green&0xff
        b = pixel.blue&0xff
        p ['%x'%r, '%x'%g, '%x'%b]
        p [r, g, b]
        p ((306 * (r) + 601 * (g) + 117 * (b) + (1 << 9)) >> 10)
        p img.export_pixels_to_str(i, j, 1, 1, "I").ord
        p "x"
      end
    end
  end

  self.new img
end

Instance Method Details

#gray ⇒ Object 



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# File 'lib/zxing/rmagick/image.rb', line 88

def gray
  @native.export_pixels_to_str(0, 0, @native.columns, @native.rows, "I")
end

#height ⇒ Object 



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# File 'lib/zxing/rmagick/image.rb', line 84

def height
  @native.rows
end

#rotate(angle) ⇒ Object 



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# File 'lib/zxing/rmagick/image.rb', line 76

def rotate angle
  self.class.new @native.rotate(angle)
end

#width ⇒ Object 



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# File 'lib/zxing/rmagick/image.rb', line 80

def width
  @native.columns
end