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# File 'lib/rucaptcha/captcha.rb', line 21
def create(code)
chars = code.split('')
all_left = 20
font_size = RuCaptcha.config.font_size
full_height = font_size
full_width = font_size * chars.size
size = "#{full_width}x#{full_height}"
half_width = full_width / 2
full_height = full_height
half_height = full_height / 2
text_top = 0
text_left = 0 - (font_size * 0.28).to_i
stroke_width = (font_size * 0.08).to_i + 1
text_width = font_size + text_left
label = "=#{' ' * (chars.size - 1)}="
text_opts = []
line_opts = []
chars.each_with_index do |char, i|
rgb = rand_color
text_color = "rgba(#{rgb.join(',')}, 1)"
line_color = "rgba(#{rgb.join(',')}, 0.6)"
text_opts << %(-fill '#{text_color}' -draw 'text #{(text_left + text_width) * i + all_left},#{text_top} "#{char}"')
left_y = rand_line_top(text_top, font_size)
right_x = half_width + (half_width * 0.3).to_i
right_y = rand_line_top(text_top, font_size)
line_opts << %(-draw 'stroke #{line_color} line #{rand(10)},#{left_y} #{right_x},#{right_y}')
end
command = <<-CODE
convert -size #{size} \
-strokewidth #{stroke_width} \
#{line_opts.join(' ')} \
-pointsize #{font_size} -weight 500 \
#{text_opts.join(' ')} \
-wave #{rand(2) + 3}x#{rand(2) + 1} \
-rotate #{rand(10) - 5} \
-gravity NorthWest -sketch 1x10+#{rand(2)} \
-fill none \
-implode #{RuCaptcha.config.implode} -trim label:- png:-
CODE
if Gem.win_platform?
png_file_path = Rails.root.join('tmp', 'cache', "#{code}.png")
command = "convert -size #{size} xc:White -gravity Center -weight 12 -pointsize 20 -annotate 0 \"#{code}\" -trim #{png_file_path}"
require 'open3'
_stdout_str, stderr_str = Open3.capture3(command)
raise "RuCaptcha: #{stderr_str.strip}" if stderr_str != nil && stderr_str.length > 0
png_file_path
else
command.strip!
pid, stdin, stdout, stderr = POSIX::Spawn.popen4(command)
Process.waitpid(pid)
err = stderr.read
raise "RuCaptcha: #{err.strip}" if err != nil && err.length > 0
stdout.read
end
end
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