<?PHP
// Class GifPix and Function Hex2Bin
// By Roberto Bertó <berto@que.com.br> under GPL license.
// Free like Linux!
/**
* A class to create 1x1 size gif image without GD.
* @author Roberto Bertó
*/
class Gifpix {
// PRIVATE VARS
var $ini = '47494638396101000100f70000';
var $end;
var $nor = '2c000000000100010000080400010404003b';
var $inc = '21f90401000000002c000000000100010000080400010404003b';
/**
* Constructor of the class Gifpix.
* @public
* @returns void
*/
function gifpix () {
$this->end = str_repeat('f',1530);
}
/**
* Internal function.
* @private
* @returns string
*/
function hex2bin ($s) {
$n = strlen($s);
if ($n % 2 != 0) { return FALSE; }
$t = "";
for ($x = 1; $x <= $n/2; $x++) {
$t .= chr(hexdec(substr($s,2* $x - 2,2)));
}
return $t;
}
/**
* function to create the image.
* @public
* @returns string
*/
function create ($color,$incolor = 0) {
$hex = $this->ini;
$hex .= $color;
$hex .= $this->end;
if ($incolor == 1) { $hex .= $this->inc; }
else { $hex .= $this->nor; }
return $this->hex2bin($hex);
}
}
?>
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