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get_multiline_type_metrics.rb.html
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get_multiline_type_metrics.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">
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<title>RMagick example: get_multiline_type_metrics.rb</title>
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<h1>get_multiline_type_metrics.rb</h1>
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<pre class="language-ruby">
# frozen_string_literal: true
require 'rmagick'
TEXT = 'get\nmultiline\ntype\nmetrics'
background = Magick::Image.new(200, 200)
gc = Magick::Draw.new
# Draw the text centered on the background
gc.annotate(background, 0, 0, 0, 0, TEXT) do |options|
options.font_family = 'Verdana'
options.pointsize = 36
options.gravity = Magick::CenterGravity
options.stroke = 'none'
end
# Get the metrics
metrics = gc.get_multiline_type_metrics(background, TEXT)
# Compute the corners for a rectangle surrounding the text
x = (background.columns - metrics.width) / 2
y = (background.rows - metrics.height) / 2
# Draw 2 rectangles over the text.
gc = Magick::Draw.new
gc.stroke('red')
gc.stroke_width(5)
gc.stroke_linejoin('round')
gc.fill('cyan')
gc.fill_opacity(0.10)
gc.rectangle(x, y, x + metrics.width, y + metrics.height)
gc.stroke('white')
gc.stroke_width(1)
gc.fill('none')
gc.rectangle(x, y, x + metrics.width, y + metrics.height)
gc.draw(background)
background.border!(1, 1, 'blue')
background.write('get_multiline_type_metrics.gif')
</pre>
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