OTF，TTF字体cmap表

Question

I have managed to get the cmap from the OTF file, which looks like this:

object(SimpleXMLElement)#4 (3) {
  ["tableVersion"]=>
  object(SimpleXMLElement)#5 (1) {
    ["@attributes"]=>
    array(1) {
      ["version"]=>
      string(1) "0"
    }
  }
  ["cmap_format_4"]=>
  array(2) {
    [0]=>
    object(SimpleXMLElement)#6 (3) {
      ["@attributes"]=>
      array(3) {
        ["platformID"]=>
        string(1) "0"
        ["platEncID"]=>
        string(1) "3"
        ["language"]=>
        string(1) "0"
      }
      ["map"]=>
      array(222) {
        [0]=>
        object(SimpleXMLElement)#9 (1) {
          ["@attributes"]=>
          array(2) {
            ["code"]=>
            string(4) "0x20"
            ["name"]=>
            string(5) "space"
          }
        }
        [1]=>
        object(SimpleXMLElement)#11 (1) {
          ["@attributes"]=>
          array(2) {
            ["code"]=>
            string(4) "0x21"
            ["name"]=>
            string(6) "exclam"
          }

Now, I need to generate character map using PHP GD or any other way. PHP GD preferred, though. How do convert letter in format 0x21 to something that would look like letter?

Answer 1

The simplest way is just to draw the characters on to an image using the font definition.

Have a look at the definition for imagettftext() - trying to perform the rendering yourself from glyph outlines is not advisable.