Class: CineSync::Mask

Inherits:
Object
  • Object
show all
Defined in:
lib/cinesync/xml.rb,
lib/cinesync/mask.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(ratio_or_width = nil, height = nil) ⇒ Mask

Returns a new instance of Mask.



6
7
8
9
10
11
12
13
14
15
16
17
18
19
 
# File 'lib/cinesync/mask.rb', line 6

def initialize(ratio_or_width = nil, height = nil)
  @alpha = 1.0
  @center = [0.5, 0.5]
  @scale_factor = 1.0
  if ratio_or_width and height.nil?
    self.ratio = ratio_or_width
  elsif ratio_or_width and height
    @width = Float(ratio_or_width)
    @height = Float(height)
  else
    @width = 1
    @height = 1
  end
end

Instance Attribute Details

#alpha ⇒ Object

Returns the value of attribute alpha.



3
4
5
 
# File 'lib/cinesync/mask.rb', line 3

def alpha
  @alpha
end

#center ⇒ Object

Returns the value of attribute center.



3
4
5
 
# File 'lib/cinesync/mask.rb', line 3

def center
  @center
end

#height ⇒ Object

Returns the value of attribute height.



4
5
6
 
# File 'lib/cinesync/mask.rb', line 4

def height
  @height
end

#scale_factor ⇒ Object

Returns the value of attribute scale_factor.



3
4
5
 
# File 'lib/cinesync/mask.rb', line 3

def scale_factor
  @scale_factor
end

#width ⇒ Object

Returns the value of attribute width.



4
5
6
 
# File 'lib/cinesync/mask.rb', line 4

def width
  @width
end

Class Method Details

.load(elem) ⇒ Object 



326
327
328
329
330
331
332
333
334
335
336
 
# File 'lib/cinesync/xml.rb', line 326

def self.load(elem)
  returning self.new do |mask|
    mask.alpha = elem.attribute('alpha').value.to_f
    x = elem.elements['center/attribute::x'].value.to_f
    y = elem.elements['center/attribute::y'].value.to_f
    mask.center = [x, y]
    mask.width  = elem.elements['ratio/attribute::width'].value.to_f
    mask.height = elem.elements['ratio/attribute::height'].value.to_f
    mask.scale_factor = elem.elements['scaleFactor/attribute::value'].value.to_f
  end
end

Instance Method Details

#default? ⇒ Boolean

Returns:

  • (Boolean) 


31
32
33
34
 
# File 'lib/cinesync/mask.rb', line 31

def default?
  alpha == 1.0 and center == [0.5, 0.5] and scale_factor == 1.0 and
  width > 0.0 and width == height
end

#ratio ⇒ Object 



21
22
23
24
25
 
# File 'lib/cinesync/mask.rb', line 21

def ratio
  wh = [width, height]
  # Convert to ints if the float represents an int
  wh.map {|f| (f == f.floor) ? f.to_i : f }.map {|num| num.to_s }.join(':')
end

#ratio=(rat) ⇒ Object 



27
28
29
 
# File 'lib/cinesync/mask.rb', line 27

def ratio=(rat)
  @width, @height = rat.split(':', 2).map(&:to_f)
end

#to_xml(x) ⇒ Object

eMask = element mask {

aAlpha &
element center { aXY } &
element ratio { aRatio } &
eScaleFactor }



314
315
316
317
318
319
320
321
322
323
 
# File 'lib/cinesync/xml.rb', line 314

def to_xml(x)
  fail "#{self.inspect}: Invalid" unless valid?
  return if default?

  x.mask(:alpha => alpha) {
    x.center(:x => center[0], :y => center[1])
    x.ratio(:width => width, :height => height)
    x.scaleFactor(:value => scale_factor)
  }
end

#valid? ⇒ Boolean

Returns:

  • (Boolean) 


36
37
38
39
 
# File 'lib/cinesync/mask.rb', line 36

def valid?
  default? or (width > 0.0 and height > 0.0 and center.length == 2 and
  [alpha, scale_factor, *center].all? {|f| (0.0..1.0) === f }) rescue false
end