ruby - Rmagick 在图像中写入文本

Question

有人可以花我几行代码，在图像底部添加文字吗？我想使用 Rmagick，但我也愿意使用其他工具。

Answer 1

我也发现了这一点，它对我来说很完美。

require 'RMagick'
include Magick

#Dimisions based on an image 3072x2048

unless ARGV[0] and File.exists?(ARGV[0])
  puts "\n\n\nYou need to specify a filename:  watermark.rb <filename>\n\n\n"
  exit
end

img = Image.read(ARGV[0]).first
new_img = "wm_#{ARGV[0]}"

if File.exists?(new_img)
  puts "Image already exists.  Unable to create file."
  exit
end

watermark = Image.new(600, 50)

watermark_text = Draw.new
watermark_text.annotate(watermark, 0,0,0,0, "foo bar bla") do
  watermark_text.gravity = CenterGravity
  self.pointsize = 50
  self.font_family = "Arial"
  self.font_weight = BoldWeight
  self.stroke = "none"
end

watermark.rotate!(45)
watermark = watermark.shade(true, 310, 30)
img.composite!(watermark, SouthWestGravity, HardLightCompositeOp)               #Bottom-Left Marking
watermark.rotate!(-90)
img.composite!(watermark, NorthWestGravity, HardLightCompositeOp)               #Top-Left Marking
watermark.rotate!(90)
img.composite!(watermark, NorthEastGravity, HardLightCompositeOp)               #Top-Right Marking
watermark.rotate!(-90)
img.composite!(watermark, SouthEastGravity, HardLightCompositeOp)               #Bottom-Right Marking

puts "Writing #{new_img}"
img.write new_img

Answer 2

看看RMagick 文档。