Class: RbSDL2::Window::Display::GammaRamp

Inherits:
Object
  • Object
show all
Defined in:
lib/rb_sdl2/window/display.rb

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(ptr) ⇒ GammaRamp

Returns a new instance of GammaRamp.



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# File 'lib/rb_sdl2/window/display.rb', line 53

def initialize(ptr)
  @ptr = ptr
end

Class Method Details

.[](*a) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/rb_sdl2/window/display.rb', line 38

def [](*a)
  raise ArgumentError if a.length != 256
  ptr = ::FFI::MemoryPointer.new(:uint16, 256).write_array_of_uint16(a)
  obj = allocate
  obj.__send__(:initialize, ptr)
  obj
end

.new(gamma) ⇒ Object 



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# File 'lib/rb_sdl2/window/display.rb', line 46

def new(gamma)
  ptr = ::FFI::MemoryPointer.new(:uint16, 256)
  ::SDL.CalculateGammaRamp(gamma, ptr)
  super(ptr)
end

Instance Method Details

#to_a ⇒ Object Also known as: to_ary 



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# File 'lib/rb_sdl2/window/display.rb', line 59

def to_a = @ptr.read_array_of_uint16(256)

#to_ptr ⇒ Object 



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# File 'lib/rb_sdl2/window/display.rb', line 57

def to_ptr = @ptr