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circle.rb.html
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<!DOCTYPE public PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
<head>
<meta name="generator" content="ex2html.rb" />
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<title>RMagick example: circle.rb</title>
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<body>
<h1>circle.rb</h1>
<div class="bodybox">
<div class="bodyfloat">
<pre class="language-ruby">
# frozen_string_literal: true
require 'rmagick'
imgl = Magick::ImageList.new
imgl.new_image(250, 250, Magick::HatchFill.new('white', 'LightCyan2'))
gc = Magick::Draw.new
# Draw the circle
gc.fill_opacity(0)
gc.stroke('red').stroke_width(3)
gc.circle(125, 125, 25, 125)
# Draw a little gray circle on the perimeter
gc.stroke_width(1)
gc.stroke('gray50')
gc.circle(25, 125, 28, 128)
# Draw a dot at the center
gc.fill_opacity(1)
gc.circle(125, 125, 128, 128)
# Annotate the dots
gc.font_weight(Magick::NormalWeight)
gc.font_style(Magick::NormalStyle)
gc.fill('black')
gc.fill_opacity(1)
gc.stroke('transparent')
gc.text(132, 125, "'125,125'")
gc.text(32, 125, "'25,125'")
gc.draw(imgl)
imgl.border!(1, 1, 'lightcyan2')
imgl.write('circle.gif')
</pre>
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