Image Object

Table of Contents

• GD::Image.new
• GD::Image.newFromXbm
• GD::Image.newFromGd
• interlace
• bounds, width, height
• gif
• gd

• GD::Image.new

  function

  create image object

  format

  im = GD::Image.new(width, heihgt)

  source | image_new.rb

  im = GD::Image.new(200, 200)
  
  im.gif STDOUT
  

  output

  

• GD::Image.newFromXbm

  function

  create image object(read from xbm file)

  format

  im = GD::Image.newFromXbm(file)

  source | image_newfromxbm.rb , image_newfromxbm.xbm

  file = open("image_newfromxbm.xbm", "rb")
  im = GD::Image.newFromXbm(file)
  file.close
  
  im.gif STDOUT
  

  output

  

• GD::Image.newFromGd

  function

  create image object(read from gd file)

  format

  im = GD::Image.newFromGd(file)

  source | image_newfromgd.rb

  file = open("image_newfromgd.gd", "rb")
  im = GD::Image.newFromGd(file)
  file.close
  
  im.gif STDOUT
  

  output

  

• interlace

  function

  parameter of interlace

  format

  im.interlace

  source | interlace.rb

  STDERR.print im.interlace, "\n"
  im.interlace = TRUE
  STDERR.print im.interlace, "\n"
  

  output

  

  false
  true
  

• bounds, width, height

  function

  return size of image object

  format

  x_size, y_size = im.bounds
  x_size = im.width
  y_size = im.height
  

  source | image_size.rb

  im = GD::Image.new(200, 300)
  
  w, h = im.bounds
  STDERR.print "width: ", w, "  height: ", im.height, "\n"
  STDERR.print "width:  ", im.width, "\n"
  STDERR.print "height: ", im.height, "\n"
  

  output

  width: 200  height: 300
  width:  200
  height: 300
  

• gif

  function

  output with gif file format

  format

  im.gif(OUT)

  source | image_gif.rb

  im = GD::Image.new(200, 200)
  
  im.gif STDOUT
  

  output

  

• gd

  function

  output with gd file format

  format

  im.gd(OUT)

  source | image_gd.rb

  im = GD::Image.new(200, 200)
  
  im.gd STDOUT
  

  output

  What is gd file format? :-)