Module: Wx::Image::Histogram

Defined in:

lib/wx/doc/image.rb

Instance Method Summary

• #find_first_unused_colour(r = 1, g = 0, b = 0) ⇒ Array(Integer,Integer,Integer)^?

  Find first colour that is not used in the image and has higher RGB values than RGB(r, g, b).

• #make_key(r, g, b) ⇒ Integer

  Calculate an image histogram key from given RGB values.

Instance Method Details

#find_first_unused_colour(r = 1, g = 0, b = 0) ⇒ Array(Integer,Integer,Integer)^?

Find first colour that is not used in the image and has higher RGB values than RGB(r, g, b)

Parameters:

• r (Integer) (defaults to: 1) —

  Red value

• g (Integer) (defaults to: 0) —

  Green value

• b (Integer) (defaults to: 0) —

  Blue value

Returns:

• (Array(Integer,Integer,Integer), nil) —

  RGB values of first unused colour or nil if none found

# File 'lib/wx/doc/image.rb', line 42

def find_first_unused_colour(r=1, g=0, b=0) end

#make_key(r, g, b) ⇒ Integer

Calculate an image histogram key from given RGB values.

Parameters:

• r (Integer) —

  Red value

• g (Integer) —

  Green value

• b (Integer) —

  Blue value

Returns:

• (Integer) —

  key value

# File 'lib/wx/doc/image.rb', line 35

def make_key(r,g,b) end