EXTRAIRE LA MINIATURE D'UN FICHIER .AI (ADOBE ILLUSTRATOR)

<?php


function Extract_AI_thumbnail($AIfile) {
	
	// Extract thumbnails from .AI files
	// input : path to file
	// output : GD image
	// author : Olivier Ligny, antares7364 'at' yahoo.fr, 2007-09-20
	// thanks to : http://groups.google.com/group/adobe.illustrator.windows/browse_thread/thread/715cc9efe657f280/0a9d7b1244b59062?hl=en&lnk=st&q=AI7_Thumbnail+%22hex+bytes%22&rnum=1

	$f = fopen($AIfile, 'rb');
	$data = fread($f, 100000);
	fclose($f);

	$start = strpos($data, '%AI7_Thumbnail:');
	$end   = strpos($data, '%%EndData');
	if(!$start || !$end) return false;
	//echo "TN: from $start to $end\r\n";
	//die(substr($data, $start, $end-$start));
	$tnData = substr($data, $start, $end-$start);
	//die(substr($tnData, 0, 10));
	$header = substr($tnData, strpos($tnData,':')+1, 100);
	$header = substr($header, 0, strpos($header,"\r"));
	//die(str_replace("\r", "\r\n", $header));
	$imageSize = explode(' ', trim($header));
	//echo "Image size : ".$imageSize[0].' * '.$imageSize[1]."\r\n"; //exit;
	if($imageSize[0] * $imageSize[1] == 0) return false; //die("Error: invalid thumbnail header : $header\r\n");
	$imgData = substr($tnData, strpos($tnData,'Hex Bytes')+strlen('Hex Bytes'), strlen($tnData));
	$imgData = trim($imgData);
	$imgData = str_replace("\r", "", $imgData);
	$imgData = str_replace("\n", "", $imgData);
	$imgData = str_replace("%", "", $imgData);
	$imgData = str_replace("", "", $imgData);
	$len = strlen($imgData);
	$binData = pack("H" . $len, $imgData);
	$arr = Array();
	for($i=0; $i<strlen($binData); $i++) $arr[$i] = ord($binData[$i]);
	$byteArray = $arr;
	$gdimg = imagecreatetruecolor($imageSize[0], $imageSize[1]);
	$colors = Array();
	for($c=0; $c<256*3; $c+=3) {
		$colors[] = imagecolorallocate($gdimg, $byteArray[$c+0], $byteArray[$c+1], $byteArray[$c+2]);
	}
	$refs = Array();
	if($binData[256*3+0].$binData[256*3+1].$binData[256*3+2]=='RLE') {
		for($c=256*3; $c<count($byteArray); $c++) {
			$b = $byteArray[$c];
			if($b != 0xFD) $refs[] = $b;
			else {
				$c++;
				$b = $byteArray[$c];
				if($b == 0xFD) $refs[] = $b;
				else {
					$n = $b;
					$c++;
					$b = $byteArray[$c];
					for($i=0; $i<$n; $i++) $refs[] = $b;
				}
			}
		}
	} else {
		for($c=256*3; $c<count($byteArray); $c++) {
			$refs[] = $byteArray[$c];
		}
	}
	for($y=0; $y<$imageSize[1]; $y++) {
		for($x=0; $x<$imageSize[0]; $x++) {
			$n = $refs[$y*$imageSize[0] + $x];
			@imagesetpixel($gdimg, $x, $y, $colors[$n]);
		}
	}
	return $gdimg;
}


$img = Extract_AI_thumbnail('fichier.ai');
imagejpeg($img, 'fichier.jpg', 85);


?>