Eric-Guo

# encoding: utf-8
require 'mini_magick'
image = MiniMagick::Image.open('origin.jpg')
image.combine_options do |c|
  c.font '/Library/Fonts/Songti.ttc'
  c.pointsize 38
  c.draw "text 360,145 'Ruby语言'"
  c.fill 'red'
end
outimage = image.composite(MiniMagick::Image.open('overlay.jpg')) do |c|

GenjiApp

#import <AppKit/AppKit.h>

@interface NSImage (DrawAttributedString)

+ (NSImage *)imageWithAttributedString:(NSAttributedString *)attributedString
                       backgroundColor:(NSColor *)backgroundColor;
+ (NSImage *)imageWithAttributedString:(NSAttributedString *)attributedString;
+ (NSImage *)imageWithString:(NSString *)string;

@end