Class: Mapel::Engine::ImageMagick

Inherits:
Mapel::Engine show all
Defined in:
lib/mapel.rb

Instance Attribute Summary

Attributes inherited from Mapel::Engine

#command, #commands, #output, #status

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Mapel::Engine

#initialize, #success?

Constructor Details

This class inherits a constructor from Mapel::Engine

Class Method Details

.info(source) ⇒ Object 



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# File 'lib/mapel.rb', line 36

def self.info(source)
  im = new(source)
  im.commands << 'identify'
  im.commands << source
  im.run.to_info_hash
end

.list(type = nil) ⇒ Object 



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# File 'lib/mapel.rb', line 50

def self.list(type = nil)
  im = new
  im.commands << 'convert -list'
  im.run
end

.render(source = nil) ⇒ Object 



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# File 'lib/mapel.rb', line 43

def self.render(source = nil)
  im = new(source)
  im.commands << 'convert'
  im.commands << source unless source.nil?
  im
end

Instance Method Details

#crop(*args) ⇒ Object 



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# File 'lib/mapel.rb', line 56

def crop(*args)
  @commands << "-crop \"#{Geometry.new(*args).to_s(true)}\""
  self
end

#gravity(type = :center) ⇒ Object 



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# File 'lib/mapel.rb', line 61

def gravity(type = :center)
  @commands << "-gravity #{type}"
  self
end

#repage ⇒ Object 



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# File 'lib/mapel.rb', line 66

def repage
  @commands << "+repage"
  self
end

#resize(*args) ⇒ Object 



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# File 'lib/mapel.rb', line 71

def resize(*args)
  @commands << "-resize \"#{Geometry.new(*args)}\""
  self
end

#resize!(*args) ⇒ Object 



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# File 'lib/mapel.rb', line 76

def resize!(*args)
  width, height = Geometry.new(*args).dimensions
  resize("#{width}x#{height}^").crop(width, height).repage
end

#run ⇒ Object 



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# File 'lib/mapel.rb', line 96

def run
  @output = `#{to_preview}`
  @status = ($? == 0)
  self
end

#scale(*args) ⇒ Object 



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# File 'lib/mapel.rb', line 81

def scale(*args)
  @commands << "-scale \"#{Geometry.new(*args)}\""
  self
end

#to(path) ⇒ Object 



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# File 'lib/mapel.rb', line 86

def to(path)
  @commands << path
  self
end

#to_info_hash ⇒ Object 



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# File 'lib/mapel.rb', line 106

def to_info_hash
  meta = @output.split(' ')
  {
    :path       => meta[0],
    :format     => meta[1],
    :dimensions => meta[2].split('x').map {|d| d.to_i},
    :depth      => meta[4],
    :size       => meta[6]
  }
end

#to_preview ⇒ Object 



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# File 'lib/mapel.rb', line 102

def to_preview
  @commands.map { |cmd| cmd.respond_to?(:call) ? cmd.call : cmd }.join(' ')
end

#undo ⇒ Object 



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# File 'lib/mapel.rb', line 91

def undo
  @commands.pop
  self
end