Class: Mir::Image

Inherits:
Grid
  • Object
show all
Includes:
InfoDisplay
Defined in:
lib/mir/01_model.rb

Instance Attribute Summary collapse

Attributes inherited from Grid

#size

Class Method Summary collapse

Instance Method Summary collapse

Methods included from InfoDisplay

#hit_a_key, #info

Methods inherited from Grid

#[], #[]=, #each, #fill_with, from_a, #initialize, #print, #to_a

Constructor Details

This class inherits a constructor from Mir::Grid

Instance Attribute Details

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/mir/01_model.rb', line 112

def name
  @name
end

Class Method Details

.open(filename) ⇒ Object 



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# File 'lib/mir/01_model.rb', line 113

def self.open(filename)
  unless File.exist?(filename)
    raise "file '#{filename}' not found"
  end
  image=nil
  File.open(filename, 'r') do |f|
    header=[]
    begin
      unless (line=f.gets.chomp).start_with?('#')
        header << line
      end
    end until header.size==3
    width, height = header[1].split.map {|n| n.to_i }
    if header[0] != 'P6' or header[2] != '255' or width < 1 or height < 1
      raise StandardError, "file '#{filename}' does not start with the expected header"
    end
    f.binmode
    image = self.new(width, height)

    height.times do |y|
       width.times do |x|
         # read 3 bytes
         red, green, blue = f.read(3).unpack('C3')
         image[y,x] = Rgb.new(red, green, blue)
       end
    end
  end
  image.name=File.basename(filename)
  image
end

.random(sx, sy) ⇒ Object 



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# File 'lib/mir/01_model.rb', line 148

def Image.random sx,sy
  ary=Grid.random(sx,sy,Rgb).to_a
  Image.from_a ary,sx,sy
end

Instance Method Details

#each_pixel(&block) ⇒ Object 



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# File 'lib/mir/01_model.rb', line 144

def each_pixel &block
  each &block
end