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Contents
#
# Demonstrate the export_pixels and import_pixels methods.
#
require 'rmagick'
include Magick
puts <<END_INFO
This example demonstrates the export_pixels and import_pixels methods
by copying an image one row at a time. The result is an copy that
is identical to the original.
END_INFO
img = Image.read('../doc/ex/images/Gold_Statue.jpg').first
copy = Image.new(img.columns, img.rows)
begin
img.rows.times do |r|
scanline = img.export_pixels(0, r, img.columns, 1, 'RGB')
copy.import_pixels(0, r, img.columns, 1, 'RGB', scanline)
end
rescue NotImplementedError
$stderr.puts 'The export_pixels and import_pixels methods are not supported' \
' by this version of ImageMagick/GraphicsMagick'
exit
end
copy.write('copy.gif')
exit
Version data entries
13 entries across 13 versions & 3 rubygems