Sha256: c710b993b4aa32e092937ca7982a081d803f52ad0bb6bd00c183595e761a5701

Contents?: true

Size: 794 Bytes

Versions: 13

Compression:

Stored size: 794 Bytes

Contents

#!/usr/bin/env ruby -w

require 'rmagick'

img = Magick::Image.new(40, 40) {self.background_color = 'lightcyan2'}

# The view is 400 pixels square, starting
# column 10, row 5 from the top of the image.
img.view(10, 5, 20, 20) do |view|
  # Set all the pixels in the view to green.
  view[][] = Magick::Pixel.new(0, Magick::QuantumRange)

  # Change the top and bottom rows to red.
  view[0][] = 'red'
  view[-1,1][] = 'red'

  # Set 6 pixels to black.
  view[[13,15]][[12,14,16]] = 'black'

  # Set 1 pixel to yellow.
  view[5][7] = 'yellow'

  # Change the green channel of all the
  # pixels on row 8.
  view[8][].green = Magick::QuantumRange/2

  # Change the blue channel of 8 pixels
  # on column 10.
  view[4,8][10].blue = Magick::QuantumRange
end

img.scale(5).write('viewex.gif')
exit

Version data entries

13 entries across 13 versions & 3 rubygems

Version Path
rmagick-windows-2.16.5 doc/ex/viewex.rb
rmagick-windows-2.16.4 doc/ex/viewex.rb
rmagick-windows-2.16.3 doc/ex/viewex.rb
rmagick-windows-2.16.2 doc/ex/viewex.rb
rmagick-windows-2.16.1 doc/ex/viewex.rb
mdg-1.0.1 vendor/bundle/ruby/2.3.0/gems/rmagick-2.16.0/doc/ex/viewex.rb
rmagick-2.16.0 doc/ex/viewex.rb
rmagick-2.15.4 doc/ex/viewex.rb
rmagick-2.15.3 doc/ex/viewex.rb
rmagick-2.15.2 doc/ex/viewex.rb
rmagick-2.15.1 doc/ex/viewex.rb
rmagick-2.15.0 doc/ex/viewex.rb
rmagick-2.14.0 doc/ex/viewex.rb