module ChunkyPNG::Canvas::Operations

def trim!(border = pixels.first)

Other tags:
    See: #trim -

Returns:
  • (ChunkyPNG::Canvas) - Returns itself, but with the border

Parameters:
  • border (Integer) -- The color to attempt to trim. 
def trim!(border = pixels.first)
  x1 = [*0...width].index   { |c| column(c).uniq != [border] }
  x2 = [*0...width].rindex  { |c| column(c).uniq != [border] }
  y1 = [*0...height].index  { |r|    row(r).uniq != [border] }
  y2 = [*0...height].rindex { |r|    row(r).uniq != [border] }
  crop! x1, y1, x2 - x1 + 1, y2 - y1 + 1
end