Sha256: 1596a668dfa87343ae936f2e98b98ff5515f181a4131695c45703282329a6e83
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Size: 830 Bytes
Versions: 29
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Stored size: 830 Bytes
Contents
#! /usr/local/bin/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
29 entries across 29 versions & 2 rubygems