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#!/usr/bin/ruby
########################################################################
# test_font.rb - draw translucent text on an image #
# (c) 2002 Paul Duncan <pabs@pablotron.org> #
# #
# - test Imlib2::Font methods and Imlib2::Color methods #
########################################################################
# load imlib2 binding
require 'imlib2'
# text to draw
text = 'Bill Gates is a criminal!'
# filename variables
filename = 'images/bill_gates.jpg'
output_filename = 'test_font_1.png'
output_filename = ARGV.shift if ARGV.length != 0
# font variables
fontpath = 'fonts'
# these fonts were removed due to licensing issues
#fontname = 'quadapto/32'
#fontname = '20thcent/32'
fontname = 'yudit/32'
# font colors
colors = [
Imlib2::Color::RED,
Imlib2::Color::YELLOW,
Imlib2::Color::GREEN,
Imlib2::Color::AQUA,
Imlib2::Color::BLUE,
Imlib2::Color::VIOLET,
].each { |color| color.a = 128 }
# text drop-shadow x offset, y offset, and color
sh = {
'x' => 2,
'y' => 2,
'color' => Imlib2::Color::RgbaColor.new(0, 0, 0, 64),
}
# load filename
begin
im = Imlib2::Image::load filename
rescue Imlib2::FileError
die "Couldn't load \"#{filename}\": " + $!
end
# add specified font path and load font
Imlib2::Font::add_path fontpath
font = Imlib2::Font.new fontname
# get the height and width of the specified text with our font, and use that
# to calculate the x and y offset so the text will be centered
fw, fh = font.size text
fx, fy = (im.width - fw) / 2, (im.height / 2 - fh) / 2;
# draw text on image with specified font and color
c_i = -1
0.upto(im.height / fh) { |offset|
# draw drop-shadow
im.draw_text font, text, fx + sh['x'], fh * offset + sh['y'], sh['color']
# draw text (in specified color)
color = colors[c_i = (c_i + 1) % colors.length]
im.draw_text font, text, fx, fh * offset, color
}
# save image to output filename
begin
im.save output_filename
rescue Imlib2::FileError
$stderr.puts "Couldn't save \"#{output_filename}\": " + $!
end
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