Class: ImageLimitResize::Base

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

Overview

image magick limit resize author @kanayannet

Constant Summary collapse

FORMAT_PATTERN = 
/^jpeg$|^gif$|^png$/i

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(file: nil, buffer: nil) ⇒ Base

Returns a new instance of Base.



8
9
10
11
12
 
# File 'lib/image_limit_resize.rb', line 8

def initialize(file: nil, buffer: nil)
  @img = Magick::Image.read(file).first if !file.nil? && File.exist?(file)
  @img = Magick::Image.from_blob(buffer).shift unless buffer.nil?
  @size = nil
end

Instance Attribute Details

#size ⇒ Object

Returns the value of attribute size.



13
14
15
 
# File 'lib/image_limit_resize.rb', line 13

def size
  @size
end

Instance Method Details

#format ⇒ Object 



15
16
17
 
# File 'lib/image_limit_resize.rb', line 15

def format
  @img.format
end

#resize(file) ⇒ Object 



26
27
28
29
30
31
32
33
34
35
36
37
38
 
# File 'lib/image_limit_resize.rb', line 26

def resize(file)
  valid?

  @img.auto_orient!
  @img.strip!

  width = @img.columns
  height = @img.rows
  size = width_height(width, height)
  image = @img.resize(size[:width], size[:height])

  image.write(file)
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


19
20
21
22
23
24
 
# File 'lib/image_limit_resize.rb', line 19

def valid?
  raise 'buffer and file is nil' if @img.nil?
  raise "size:#{@size} value is not Integer" unless @size.is_a?(Integer)
  raise "#{@img.format} can't allow" if FORMAT_PATTERN !~ @img.format
  raise 'size 0 can\'not allow' if @size <= 0
end