Class: PSD::Mask

Inherits:
Object
  • Object
show all
Defined in:
lib/psd/mask.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(file) ⇒ Mask

Returns a new instance of Mask.



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# File 'lib/psd/mask.rb', line 12

def initialize(file)
  @file = file
  @top = 0
  @left = 0
  @bottom = 0
  @right = 0
end

Instance Attribute Details

#bottom ⇒ Object (readonly)

Returns the value of attribute bottom.



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# File 'lib/psd/mask.rb', line 3

def bottom
  @bottom
end

#default_color ⇒ Object (readonly)

Returns the value of attribute default_color.



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# File 'lib/psd/mask.rb', line 3

def default_color
  @default_color
end

#left ⇒ Object (readonly)

Returns the value of attribute left.



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# File 'lib/psd/mask.rb', line 3

def left
  @left
end

#right ⇒ Object (readonly)

Returns the value of attribute right.



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# File 'lib/psd/mask.rb', line 3

def right
  @right
end

#size ⇒ Object (readonly)

Returns the value of attribute size.



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# File 'lib/psd/mask.rb', line 3

def size
  @size
end

#top ⇒ Object (readonly)

Returns the value of attribute top.



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# File 'lib/psd/mask.rb', line 3

def top
  @top
end

Class Method Details

.read(file) ⇒ Object 



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# File 'lib/psd/mask.rb', line 5

def self.read(file)
  mask = Mask.new(file)
  mask.parse

  mask
end

Instance Method Details

#disabled ⇒ Object 



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# File 'lib/psd/mask.rb', line 49

def disabled
  (@flags & (0x01 << 1)) > 0
end

#height ⇒ Object 



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# File 'lib/psd/mask.rb', line 41

def height
  bottom - top
end

#invert ⇒ Object 



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# File 'lib/psd/mask.rb', line 53

def invert
  (@flags & (0x01 << 2)) > 0
end

#parse ⇒ Object 



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# File 'lib/psd/mask.rb', line 20

def parse
  @size = @file.read_int
  return if @size == 0

  @mask_end = @file.tell + @size

  @top = @file.read_int
  @left = @file.read_int
  @bottom = @file.read_int
  @right = @file.read_int

  @default_color = @file.read_byte
  @flags = @file.read_byte

  @file.seek @mask_end # Useless info/padding
end

#relative ⇒ Object 



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# File 'lib/psd/mask.rb', line 45

def relative
  (@flags & 0x01) > 0
end

#to_hash ⇒ Object 



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# File 'lib/psd/mask.rb', line 57

def to_hash
  return {} if @size == 0

  {
    top: top,
    left: left,
    bottom: bottom,
    right: right,
    width: width,
    height: height,
    default_color: default_color,
    relative: relative,
    disabled: disabled,
    invert: invert
  }
end

#width ⇒ Object 



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# File 'lib/psd/mask.rb', line 37

def width
  right - left
end