ase.php
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	<?php
	/**
	* The getASEContent method has been written by Chris Williams under MIT license.
	* Copyright (c) 2011 Chris Williams - http://www.colourlovers.com
	*/

	//TODO: add code to read from http://blog.christenfeldt-edv.de/2010/04/03/adobe-swatch-exchange-ase-reader-in-php/

	/**
	* Manipulates an Adobe Swatch Exchange file
	*/
	class AdobeSwatchExchangeFile {
	/**
	* Writes palettes in ASE format
	*
	* @param $palettes array An array of swatches group
	* @return string The file content
	* @see http://www.colourlovers.com/web/blog/2007/11/08/color-palettes-in-adobe-swatch-exchange-ase
	*/
	public static function getASEContent ($palettes) {
	$internal_encoding = mb_internal_encoding();
	mb_internal_encoding("UTF-8");

	ob_start();

	$totalColors = $numPalettes = 0;

	foreach ($palettes as $palette) {
	$totalColors += count($palette["colors"]);
	++$numPalettes;
	}

	echo "ASEF"; # File signature
	echo pack("n*",1,0); # Version
	echo pack("N",$totalColors + ($numPalettes * 2)); # Total number of blocks

	foreach ($palettes as $palette) {
	echo pack("n",0xC001); # Group start

	# Length of this block - see below

	$title = (mb_convert_encoding($palette["title"],"UTF-16BE","UTF-8") . pack("n",0));
	$buffer = pack("n",(strlen($title) / 2)); # Length of the group title
	$buffer .= $title; # Group title

	echo pack("N",strlen($buffer)); # Length of this block
	echo $buffer;

	foreach ($palette["colors"] as $color) {
	echo pack("n",1); # Color entry

	# Length of this block - see below

	$title = (mb_convert_encoding($color[1],"UTF-16BE","UTF-8") . pack("n",0));
	$buffer = pack("n",(strlen($title) / 2)); # Length of the title
	$buffer .= $title; # Title

	# Colors
	list ($r,$g,$b) = array_map("intval",sscanf($color[0],"%2x%2x%2x"));
	$r /= 255;
	$g /= 255;
	$b /= 255;

	$buffer .= "RGB ";
	$buffer .= strrev(pack("f",$r));
	$buffer .= strrev(pack("f",$g));
	$buffer .= strrev(pack("f",$b));
	$buffer .= pack("n",0); # Color type - 0x00 "Global"

	echo pack("N",strlen($buffer)); # Length of this block
	echo $buffer;
	}
	echo pack("n",0xC002); # Group end

	echo pack("N",0); # Length of "Group end" block, which is 0
	}

	$return = ob_get_contents();
	ob_end_clean();

	mb_internal_encoding($internal_encoding);

	return $return;
	}
	}

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