Class: Vips::Thumbnail::Resizer

Inherits:
Object
  • Object
show all
Defined in:
lib/vips/thumbnail/resizer.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(input_path = nil, **options, &block) ⇒ Resizer

Returns a new instance of Resizer.



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# File 'lib/vips/thumbnail/resizer.rb', line 26

def initialize(input_path = nil, **options, &block)
	@input_path = input_path
	
	@block = block || lambda do
		Vips::Image.new_from_file(@input_path, autorotate: true, **options)
	end
	
	@input_image = nil
end

Instance Attribute Details

#input_path ⇒ Object (readonly)

Returns the value of attribute input_path.



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# File 'lib/vips/thumbnail/resizer.rb', line 36

def input_path
  @input_path
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/vips/thumbnail/resizer.rb', line 37

def options
  @options
end

Instance Method Details

#flush! ⇒ Object 



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# File 'lib/vips/thumbnail/resizer.rb', line 39

def flush!
	@input_image = nil
end

#input_aspect_ratio ⇒ Object 



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# File 'lib/vips/thumbnail/resizer.rb', line 51

def input_aspect_ratio
	Rational(input_image.width, input_image.height)
end

#input_image ⇒ Object 



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# File 'lib/vips/thumbnail/resizer.rb', line 43

def input_image
	unless @input_image
		@input_image = @block.call
	end
	
	return @input_image
end

#resize_to_fill(output_size) ⇒ Vips::Image

Resize the image to completely fill the desired size, if possible.

Returns:

  • (Vips::Image) —

    if the image could be resized, otherwise ‘nil`.



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# File 'lib/vips/thumbnail/resizer.rb', line 57

def resize_to_fill(output_size)
	width, height = *output_size
	
	# We can only fill and crop if the input image is BIGGER in at least one dimension than the desired output size:
	if input_image.width > width or input_image.height > height
		return fill_and_crop(input_image, width, height)
	end
end

#resize_to_fit(output_size) ⇒ Vips::Image

Resize the image to fit within the given bounds, preserving aspect ratio.

Returns:

  • (Vips::Image) —

    if the image could be resized, otherwise ‘nil`.



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# File 'lib/vips/thumbnail/resizer.rb', line 68

def resize_to_fit(output_size)
	width, height = *output_size
	
	# We can only fit if the input image is BIGGER in at least one dimension than the desired output size:
	if input_image.width > width or input_image.height > height
		return fit(input_image, width, height)
	end
end