Module: Rszr::Image::Transformations

Included in:
Rszr::Image
Defined in:
lib/rszr/image.rb

Instance Method Summary collapse

Instance Method Details

#blur(radius) ⇒ Object 



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# File 'lib/rszr/image.rb', line 108

def blur(radius)
  dup.blur!(radius)
end

#blur!(radius) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/rszr/image.rb', line 112

def blur!(radius)
  raise ArgumentError, 'illegal radius' if radius < 0
  _sharpen!(-radius)
end

#brighten(*args, **opts) ⇒ Object 



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# File 'lib/rszr/image.rb', line 126

def brighten(*args, **opts)
  dup.brighten!(*args, **opts)
end

#brighten!(value, r: nil, g: nil, b: nil, a: nil) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/rszr/image.rb', line 121

def brighten!(value, r: nil, g: nil, b: nil, a: nil)
  raise ArgumentError, 'illegal brightness' if value > 1 || value < -1
  filter!("colormod(brightness=#{value.to_f});")
end

#contrast(*args, **opts) ⇒ Object 



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# File 'lib/rszr/image.rb', line 135

def contrast(*args, **opts)
  dup.contrast!(*args, **opts)
end

#contrast!(value, r: nil, g: nil, b: nil, a: nil) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/rszr/image.rb', line 130

def contrast!(value, r: nil, g: nil, b: nil, a: nil)
  raise ArgumentError, 'illegal contrast (must be > 0)' if value < 0
  filter!("colormod(contrast=#{value.to_f});")
end

#crop(x, y, width, height) ⇒ Object 



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# File 'lib/rszr/image.rb', line 64

def crop(x, y, width, height)
  _crop(false, x, y, width, height)
end

#crop!(x, y, width, height) ⇒ Object 



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# File 'lib/rszr/image.rb', line 68

def crop!(x, y, width, height)
  _crop(true, x, y, width, height)
end

#filter(filter_expr) ⇒ Object 



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# File 'lib/rszr/image.rb', line 117

def filter(filter_expr)
  dup.filter!(filter_expr)
end

#flip ⇒ Object

vertical



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# File 'lib/rszr/image.rb', line 95

def flip
  dup.flip!
end

#flop ⇒ Object

horizontal



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# File 'lib/rszr/image.rb', line 90

def flop
  dup.flop!
end

#gamma(*args, **opts) ⇒ Object 



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# File 'lib/rszr/image.rb', line 144

def gamma(*args, **opts)
  dup.gamma!(*args, **opts)
end

#gamma!(value, r: nil, g: nil, b: nil, a: nil) ⇒ Object 



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# File 'lib/rszr/image.rb', line 139

def gamma!(value, r: nil, g: nil, b: nil, a: nil)
  #raise ArgumentError, 'illegal gamma (must be > 0)' if value < 0
  filter!("colormod(gamma=#{value.to_f});")
end

#resize(*args, **opts) ⇒ Object 



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# File 'lib/rszr/image.rb', line 56

def resize(*args, **opts)
  _resize(false, *calculate_size(*args,  **opts))
end

#resize!(*args, **opts) ⇒ Object 



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# File 'lib/rszr/image.rb', line 60

def resize!(*args, **opts)
  _resize(true, *calculate_size(*args, **opts))
end

#rotate(deg) ⇒ Object 



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# File 'lib/rszr/image.rb', line 81

def rotate(deg)
  _rotate(false, deg.to_f * Math::PI / 180.0)
end

#rotate!(deg) ⇒ Object 



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# File 'lib/rszr/image.rb', line 85

def rotate!(deg)
  _rotate(true, deg.to_f * Math::PI / 180.0)
end

#sharpen(radius) ⇒ Object 



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# File 'lib/rszr/image.rb', line 99

def sharpen(radius)
  dup.sharpen!(radius)
end

#sharpen!(radius) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/rszr/image.rb', line 103

def sharpen!(radius)
  raise ArgumentError, 'illegal radius' if radius < 0
  _sharpen!(radius)
end

#turn(orientation) ⇒ Object 



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# File 'lib/rszr/image.rb', line 72

def turn(orientation)
  dup.turn!(orientation)
end

#turn!(orientation) ⇒ Object 



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# File 'lib/rszr/image.rb', line 76

def turn!(orientation)
  orientation = orientation.abs + 2 if orientation.negative?
  _turn!(orientation % 4)
end