Class: Types::RplGrOb

Inherits:
Object
  • Object
show all
Defined in:
lib/rpl/types/grob.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(init) ⇒ RplGrOb

Returns a new instance of RplGrOb.

Raises:



39
40
41
42
43
44
45
46
47
48
49
50
51
52
 
# File 'lib/rpl/types/grob.rb', line 39

def initialize( init )
  raise RplTypeError unless self.class.can_parse?( init )

  parsed = if init.instance_of?( RplGrOb )
             init.value
           else
             /^GROB:(?<width>\d+):(?<height>\d+):(?<bits>[0-9a-f]+)$/.match( init )
           end

  @width = parsed[:width].to_i
  @height = parsed[:height].to_i
  @bits = BitArray.new
  @bits.from_i( parsed[:bits].to_i( 16 ) )
end

Instance Attribute Details

#bits ⇒ Object

Returns the value of attribute bits.



35
36
37
 
# File 'lib/rpl/types/grob.rb', line 35

def bits
  @bits
end

#height ⇒ Object

Returns the value of attribute height.



35
36
37
 
# File 'lib/rpl/types/grob.rb', line 35

def height
  @height
end

#width ⇒ Object

Returns the value of attribute width.



35
36
37
 
# File 'lib/rpl/types/grob.rb', line 35

def width
  @width
end

Class Method Details

.can_parse?(value) ⇒ Boolean

Returns:

  • (Boolean) 


64
65
66
67
 
# File 'lib/rpl/types/grob.rb', line 64

def self.can_parse?( value )
  value.instance_of?( RplGrOb ) ||
    ( value.instance_of?( String ) && value.match?(/^GROB:\d+:\d+:[0-9a-f]+$/) )
end

Instance Method Details

#==(other) ⇒ Object 



69
70
71
72
73
74
 
# File 'lib/rpl/types/grob.rb', line 69

def ==( other )
  other.class == RplGrOb &&
    other.width == @width &&
    other.height == @height &&
    other.bits.to_i == @bits.to_i
end

#clear ⇒ Object 



107
108
109
 
# File 'lib/rpl/types/grob.rb', line 107

def clear
  @bits.from_i( 0 )
end

#get_pixel(pos_x, pos_y) ⇒ Object 



99
100
101
 
# File 'lib/rpl/types/grob.rb', line 99

def get_pixel( pos_x, pos_y )
  @bits[ ( pos_y * @width ) + pos_x ]
end

#set_pixel(pos_x, pos_y, value) ⇒ Object 



103
104
105
 
# File 'lib/rpl/types/grob.rb', line 103

def set_pixel( pos_x, pos_y, value )
  @bits[ ( pos_y * @width ) + pos_x ] = value.to_i.zero? ? 0 : 1
end

#to_braille ⇒ Object 



87
88
89
90
91
92
93
94
95
96
97
 
# File 'lib/rpl/types/grob.rb', line 87

def to_braille
  canvas = Drawille::Canvas.new

  @height.times do |y|
    @width.times do |x|
      canvas[x, y] = @bits[ ( y * @width ) + x ] == 1
    end
  end

  canvas.frame
end

#to_s ⇒ Object 



60
61
62
 
# File 'lib/rpl/types/grob.rb', line 60

def to_s
  "GROB:#{@width}:#{@height}:#{@bits.to_i.to_s( 16 )}"
end

#to_text ⇒ Object 



76
77
78
79
80
81
82
83
84
85
 
# File 'lib/rpl/types/grob.rb', line 76

def to_text
  @bits.to_i
       .to_s(2)
       .ljust(@width * @height, '0')
       .slice(0, @width * @height)
       .scan(/.{1,#{@width}}/)
       .join("\n")
       .gsub( '0', '_' )
       .gsub( '1', '.' )
end

#value ⇒ Object 



54
55
56
57
58
 
# File 'lib/rpl/types/grob.rb', line 54

def value
  { width: @width,
    height: @height,
    bits: @bits.to_i.to_s( 16 ) }
end