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require 'rmagick'
# Read the snake image file and scale to 200 pixels high.
begin
snake = Magick::ImageList.new('images/Snake.png')
snake.scale!(200.0 / snake.rows)
# Read the coffee cup image and scale to 200 pixels high.
coffee = Magick::ImageList.new('images/Coffee.png')
coffee.scale!(200.0 / coffee.rows)
# We want the "no" symbol to be a little smaller.
# Read and scale to 150 pixels high.
sign = Magick::ImageList.new('images/No.png')
sign.scale!(150.0 / sign.rows)
# Change the white pixels in the sign to transparent.
sign = sign.matte_replace(0, 0)
# Create a "nosnake" draw object. Add a composite
# primitive that composites the "no" symbol over
# the snake. Draw it.
nosnake = Magick::Draw.new
nosnake.composite(
(snake.columns - sign.columns) / 2,
(snake.rows - sign.rows) / 2, 0, 0, sign
)
nosnake.draw(snake)
# Repeat for the coffee cup.
nocoffee = Magick::Draw.new
nocoffee.composite(
(coffee.columns - sign.columns) / 2,
(coffee.columns - sign.columns) / 2, 0, 0, sign
)
nocoffee.draw(coffee)
coffee.write('drawcomp1.gif')
snake.write('drawcomp2.gif')
rescue Magick::ImageMagickError
puts "#{$PROGRAM_NAME}: ImageMagickError - #{$ERROR_INFO}"
end
exit
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