<?
# Passed in: $album, $pic, $user, $height, $width, $dispsize

include("common.inc");
error_log("   ");
error_log("Pic is $pic");
error_log("Album is $album");
$myuri = getenv ("REQUEST_URI");
error_log("php_self is $myuri");
$pic = stripslashes($pic);


function CreateImage($new_width, $new_height,$source,$dest) {
	$sourcedate = 0;
	$destdate = 0;
	global $convert;
	global $album;
	global $cache_base;
        global $username;
	global $ImageTool;
        global $dispsize;

	if (file_exists($dest)) {
		clearstatcache();
		$sourceinfo = stat($source);
		$destinfo = stat($dest);
		$sourcedate = $sourceinfo[10];
		$destdate = $destinfo[10];
	}
	if (!file_exists("$dest") or ($sourcedate > $destdate)) {
		$imgsize = GetImageSize($source);
		$width = $imgsize[0];
		$height = $imgsize[1];

#                error_log("dispsize is : $dispsize");
                if ($dispsize != 'Original') {
                    if ($width > $height) {
                        $new_width = $dispsize;
                        $new_height = ceil($dispsize * $height / $width);
                    } else {
                        $new_height = $dispsize;
                        $new_width = ceil($dispsize * $width / $height);
                    }
                }
                    
     
#                error_log("Reported: Width: $width, Height: $height", 0);

		if ($width == 0) {
			# Can't really scale a zero-width image...
			# XXX: have this display an icon for the file type
                        error_log("### Zero width file!");
			return -1;
		}

		if ($ImageTool == "int") {
			if (preg_match("/\.jp(g|eg)$/i",$source)) {
				# disable errors in case of invalid image
				$error = error_reporting(0);
				$im = ImageCreateFromJPEG($source);
				error_reporting($error);
				if (!$im) {
					# problem reading the file
					return -1;
				}
				$new_im = ImageCreate($new_width,$new_height);
	
				ImageCopyResized($new_im,$im,0,0,0,0,$new_width,$new_height,ImageSX($im),ImageSY($im));

				# Check if the directories are there
				checkdir("$cache_base/$album");
			
				ImageJPEG($new_im,$dest,75);
			} elseif (preg_match("/\.gif$/i",$source)) {
				# disable errors in case of invalid image
				$error = error_reporting(0);
				$im = ImageCreateFromGIF($source);
				error_reporting($error);
				if (!$im) {
					# problem reading the file
					return -1;
				}
				$new_im = ImageCreate($new_width,$new_height);
	
				ImageCopyResized($new_im,$im,0,0,0,0,$new_width,$new_height,ImageSX($im),ImageSY($im));

				# Check if the directories are there
				checkdir("$cache_base/$album");
			
				ImageJPEG($new_im,$dest,75);
			} elseif (preg_match("/\.png$/i",$source)) {
				# disable errors in case of invalid image
				$error = error_reporting(0);
				$im = ImageCreateFromPNG($source);
				error_reporting($error);
				if (!$im) {
					# problem reading the file
					return -1;
				}
				$new_im = ImageCreate($new_width,$new_height);
	
				ImageCopyResized($new_im,$im,0,0,0,0,$new_width,$new_height,ImageSX($im),ImageSY($im));

				# Check if the directories are there
				checkdir("$cache_base/$album");
			
				ImageJPEG($new_im,$dest,75);
			} else {
				return -1;
			}
		} elseif ($ImageTool == "ext") {
#                        error_log("New width: $new_width, New height: $new_height");
			$newalbum = $album;
			exec("$convert $new_width $new_height \"$cache_base\" \"$newalbum\" \"$source\" \"$dest\" 2>&1");
#			error_log("$convert $new_width $new_height \"$cache_base\" \"$newalbum\" \"$source\" \"$dest\" 2>&1");
		}

		if (!file_exists($dest)) {
                        error_log("### Dest file not found.");
			return -1;
		}
	}
}

if ($album == "NONE") {
  $file = "$scriptbase/$pic";
} else {
  $file = "$realpixbase$album/$pic";
}

if (preg_match("/\.jp(g|eg)$/i",$file)) {
  $type = "jpeg";
} elseif (preg_match("/\.gif$/i",$file)) {
  $type = "gif";
} elseif (preg_match("/\.png$/i",$file)) {
  $type = "png";
}
# error_log("Type: $type Image: $file", 0);

if (($dispsize != "Original") && ($album != "NONE")) {
  $destpic = "${pic}__scaled_${dispsize}.jpg";
  $destfile = $cache_base."/".$usercachebase.$album."/".$destpic;
#  error_log("File: $file, Dest: $destfile", 0);

  $ret = CreateImage($width, $height, $file, $destfile);
  if ($ret == -1) {
    error_log("Didnt recognise $file in showpic.php");
  } else {
    $file = $scriptbase.$destfile;
  }
}

clearstatcache();
$fileinfo = stat($file);
$lastmodified = $fileinfo[10];


$headers = getallheaders();
#while (list ($header, $value) = each ($headers)) {
#    error_log("$header: $value<br />\n");
#}
$if_modified_since = $headers["If-Modified-Since"];

$lastmtext = gmdate("D, d M Y H:i:s", $lastmodified) . "GMT";

error_log("IMS: $if_modified_since, LMT: $lastmtext");

if ($lastmtext == $if_modified_since) {
	Header("HTTP/1.1 304 Not Modified");
	error_log("Reported file as not modified since last download");
} else {
	Header("Content-type: image/$type");
	Header("Last-Modified: " . $lastmtext); 

	error_log("Sending: $file");
	readfile($file);
}
?>