Class: Morandi::ImageProcessor

Inherits:
Object
  • Object
show all
Defined in:
lib/morandi/image_processor.rb

Overview

ImageProcessor transforms an image.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(file, user_options, local_options = {}) ⇒ ImageProcessor

Returns a new instance of ImageProcessor.



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# File 'lib/morandi/image_processor.rb', line 16

def initialize(file, user_options, local_options = {})
  @file = file

  user_options.keys.grep(/^path/).each { |k| user_options.delete(k) }

  # Give priority to user_options
  @options = (local_options || {}).merge(user_options || {})
  @local_options = local_options

  @max_size_px = @options['output.max']
  @width = @options['output.width']
  @height = @options['output.height']
end

Instance Attribute Details

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/morandi/image_processor.rb', line 14

def options
  @options
end

#pb ⇒ Object (readonly)

Returns the value of attribute pb.



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# File 'lib/morandi/image_processor.rb', line 14

def pb
  @pb
end

Instance Method Details

#process! ⇒ Object 



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# File 'lib/morandi/image_processor.rb', line 30

def process!
  case @file
  when String
    get_pixbuf
  when GdkPixbuf::Pixbuf, Morandi::ProfiledPixbuf
    @pb = @file
    @scale = 1.0
  end

  # Apply Red-Eye corrections
  apply_redeye!

  # Apply contrast, brightness etc
  apply_colour_manipulations!

  # apply rotation
  apply_rotate!

  # apply crop
  apply_crop!

  # apply filter
  apply_filters!

  # add border
  apply_decorations!

  @pb = @pb.scale_max([@width, @height].max) if @options['output.limit'] && @width && @height

  @pb
rescue GdkPixbuf::PixbufError::UnknownType => e
  raise UnknownTypeError, e.message
rescue GdkPixbuf::PixbufError::CorruptImage => e
  raise CorruptImageError, e.message
end

#result ⇒ Object

Returns generated pixbuf



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# File 'lib/morandi/image_processor.rb', line 67

def result
  process! unless @pb
  @pb
end

#write_to_jpeg(write_to, quality = nil) ⇒ Object 



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# File 'lib/morandi/image_processor.rb', line 84

def write_to_jpeg(write_to, quality = nil)
  quality ||= options.fetch('quality', '97')
  @pb.save(write_to, 'jpeg', quality: quality.to_s)
end

#write_to_png(write_to, orientation = :any) ⇒ Object 



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# File 'lib/morandi/image_processor.rb', line 72

def write_to_png(write_to, orientation = :any)
  pb = @pb

  case orientation
  when :landscape
    pb = @pb.rotate(90) if @pb.width < @pb.height
  when :portrait
    pb = @pb.rotate(90) if @pb.width > @pb.height
  end
  pb.save(write_to, 'png')
end