Class: Prawn::Images::Image Abstract

Inherits:
Object
  • Object
show all
Defined in:
lib/prawn/images/image.rb

Overview

This class is abstract.

Base class for image info objects

Direct Known Subclasses

JPG, PNG

Extension API collapse

Instance Method Details

#calc_image_dimensions(options) ⇒ Object

Calculate the final image dimensions from provided options.



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# File 'lib/prawn/images/image.rb', line 14

def calc_image_dimensions(options)
  w = options[:width] || width
  h = options[:height] || height

  if options[:width] && !options[:height]
    wp = w / Float(width)
    w = width * wp
    h = height * wp
  elsif options[:height] && !options[:width]
    hp = h / Float(height)
    w = width * hp
    h = height * hp
  elsif options[:scale]
    w = width * options[:scale]
    h = height * options[:scale]
  elsif options[:fit]
    bw, bh = options[:fit]
    bp = bw / Float(bh)
    ip = width / Float(height)
    if ip > bp
      w = bw
      h = bw / ip
    else
      h = bh
      w = bh * ip
    end
  end
  self.scaled_width = w
  self.scaled_height = h

  [w, h]
end