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require 'rmagick'
# Add a drop shadow to a text string. This example
# uses a 3-image animation to show each step of the
# process
ROWS = 60
COLS = 250
TEXT = 'Ruby rocks!'
# This imagelist will contain the animation frames
anim = Magick::ImageList.new
ex = Magick::Image.new(COLS, ROWS)
# Create a Draw object to draw the text with. Most of the text
# attributes are shared between the shadow and the foreground.
text = Magick::Draw.new
text.gravity = Magick::CenterGravity
text.pointsize = 36
text.font_weight = Magick::BoldWeight
text.font_style = Magick::ItalicStyle
text.stroke = 'transparent'
# Draw the shadow text first. The color is a very light gray.
# Position the text to the right and down.
text.annotate(ex, 0, 0, 2, 2, TEXT) do |options|
options.fill = 'gray60'
end
# Save the first frame of the animation.
anim << ex.copy
# Blur the shadow. Save a copy of the image as the 2nd frame.
ex = ex.blur_image(0, 3)
anim << ex.copy
# Add the foreground text in solid black. Position it
# to the left and up from the shadow text.
text.annotate(ex, 0, 0, -1, -1, TEXT) do |options|
options.fill = 'maroon'
end
# Save yet another copy of the image as the 3rd frame.
anim << ex.copy
# Set the delay between frames to 1 second.
anim.delay = 100
# Set the delay after the last frame to 3 seconds.
anim.cur_image.delay = 300
# Iterate forever.
anim.iterations = 0
# anim.animate
anim.write('drop_shadow.gif')
exit
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