1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
|
#
# 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(File.join(File.dirname(__FILE__), '../doc/ex/images/Gold_Statue.jpg')).first
copy = Image.new(img.columns, img.rows);
begin
img.rows.times { |r|
scanline = img.export_pixels(0, r, img.columns, 1, "RGB");
copy.import_pixels(0, r, img.columns, 1, "RGB", scanline);
}
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
|
