Knah-Tsaeb/Minigalnano
1
0
Fork 0
Code Issues Pull requests Releases Wiki Activity

simplify $_GET usage (move to beginning for easy escape if need be).

Browse source 
simplify orientation reading from big case to two small arrays.
This commit is contained in:
Piotr KUCHARSKI 2014-11-25 03:09:30 +01:00
parent 92f0e5bba0
commit 8ab86967f7
1 changed files with 118 additions and 141 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

199
createthumb.php
View file

@ -20,16 +20,19 @@ Version 0.3.5 modified by Sebastien SAUVAGE (sebsauvage.net):
USAGE EXAMPLE:
File: createthumb.php
Example: <img src="createthumb.php?filename=photo.jpg&amp;width=100&amp;height=100">
*/
// error_reporting(E_ALL);
error_reporting(0);
/*
if (preg_match("/.jpg$|.jpeg$/i", $_GET['filename'])) header('Content-type: image/jpeg');
if (preg_match("/.gif$/i", $_GET['filename'])) header('Content-type: image/gif');
if (preg_match("/.png$/i", $_GET['filename'])) header('Content-type: image/png');
Example: <img src="createthumb.php?filename=photo.jpg&amp;size=100">
*/
error_reporting(0);
$get_filename = $_GET['filename'];
$get_size = @$_GET['size'];
if (empty($get_size)) $get_size = 120;
if (preg_match("/.jpe?g$/i", $get_filename)) $get_filename_type = "JPG";
if (preg_match("/.gif$/i", $get_filename)) $get_filename_type = "GIF";
if (preg_match("/.png$/i", $get_filename)) $get_filename_type = "PNG";
// flip functions from http://stackoverflow.com/questions/8232722/how-to-flip-part-of-an-image-horizontal-with-php-gd
function flipVertical(&$img) {
$size_x = imagesx($img);
@ -90,150 +93,124 @@ if (!is_dir('thumbs') && is_writable('.'))
// Thumbnail file name and path.
// (We always put thumbnails in jpg for simplification)
$thumbname = 'thumbs/'.sanitize($_GET['filename']).'.jpg';
$thumbname = 'thumbs/'.sanitize($get_filename).'.jpg';
if (file_exists($thumbname))// If thumbnail exists, serve it.
if (file_exists($thumbname)) // If thumbnail exists, serve it.
{
$fd = fopen($thumbname, "r");
$cacheContent = fread($fd,filesize ($thumbname));
$cacheContent = fread($fd, filesize($thumbname));
fclose($fd);
header('Content-type: image/jpeg');
echo($cacheContent);
exit;
}
else // otherwise, generate thumbnail, send it and save it to file.
// Display error image if file isn't found
if (!is_file($get_filename)) {
header('Content-type: image/jpeg');
$errorimage = imagecreatefromjpeg('images/questionmark.jpg');
imagejpeg($errorimage, null, 90);
imagedestroy($errorimage);
exit;
}
// Display error image if file exists, but can't be opened
if (!is_readable($get_filename)) {
header('Content-type: image/jpeg');
$errorimage = imagecreatefromjpeg('images/cannotopen.jpg');
imagejpeg($errorimage, null, 90);
imagedestroy($errorimage);
exit;
}
// otherwise, generate thumbnail, send it and save it to file.
$target = "";
$xoord = 0;
$yoord = 0;
$imgsize = getimagesize($get_filename);
$width = $imgsize[0];
$height = $imgsize[1];
if ($width > $height) // If the width is greater than the height it’s a horizontal picture
{
// Display error image if file isn't found
if (!is_file($_GET['filename'])) {
header('Content-type: image/jpeg');
$errorimage = ImageCreateFromJPEG('images/questionmark.jpg');
ImageJPEG($errorimage,null,90);
}
// Display error image if file exists, but can't be opened
if (substr(decoct(fileperms($_GET['filename'])), -1, strlen(fileperms($_GET['filename']))) < 4 OR substr(decoct(fileperms($_GET['filename'])), -3,1) < 4) {
header('Content-type: image/jpeg');
$errorimage = ImageCreateFromJPEG('images/cannotopen.jpg');
ImageJPEG($errorimage,null,90);
}
// Define variables
$target = "";
$xoord = 0;
$yoord = 0;
if ($_GET['size'] == "")
{
$_GET['size'] = 120;
}
$imgsize = GetImageSize($_GET['filename']);
$width = $imgsize[0];
$height = $imgsize[1];
if ($width > $height) // If the width is greater than the height it’s a horizontal picture
{
$xoord = ceil(($width-$height)/2);
$width = $height; // Then we read a square frame that equals the width
}
else
{
}
else
{
$yoord = ceil(($height-$width)/2);
$height = $width;
}
}
$degrees = 0;
$flip = '';
// Rotate JPG pictures
if (preg_match("/.jpg$|.jpeg$/i", $_GET['filename']))
{
// Rotate JPG pictures
$degrees = 0;
$flip = '';
if ($get_filename_type == "JPG")
{
if (function_exists('exif_read_data') && function_exists('imagerotate'))
{
$exif = exif_read_data($_GET['filename'], 0, true);
$exif = exif_read_data($get_filename, 0, true);
if (isset($exif['IFD0']) && isset($exif['IFD0']['Orientation']))
$ort = $exif['IFD0']['Orientation'];
else
$ort = 0;
switch($ort)
{
case 3: // 180 rotate right
$degrees = 180;
break;
case 6: // 90 rotate right
$degrees = 270;
break;
case 8: // 90 rotate left
$degrees = 90;
break;
case 2: // flip vertical
$flip = 'vertical';
break;
// see http://www.daveperrett.com/articles/2012/07/28/exif-orientation-handling-is-a-ghetto/ for more info on orientation
case 7: // flipped
$degrees = 90;
$flip = 'vertical';
break;
case 5: // flipped
$degrees = 270;
$flip = 'vertical';
break;
case 4: // flipped
$degrees = 180;
$flip = 'vertical';
break;
}
}
// for more info on orientation see
// http://www.daveperrett.com/articles/2012/07/28/exif-orientation-handling-is-a-ghetto/
$ort2deg = array(3=>180, 4=>180, 5=>270, 6=>270, 7=>90, 8=>90);
$degrees = in_array($ort, $ort2deg) ? $ort2deg[$ort] : 0;
$ort2flip = array(2, 4, 5, 7);
$flip = in_array($ort, $flip2deg) ? 'vertical' : '';
}
}
$target = ImageCreatetruecolor($_GET['size'],$_GET['size']);
$target = imagecreatetruecolor($get_size, $get_size);
//if the picture can be transparent, add a white background instead a black
if (preg_match("/.gif$/i", $_GET['filename']) || preg_match("/.png$/i", $_GET['filename']))
{
// if the picture can be transparent, add a white background instead a black
if (in_array($get_filename_type, array("GIF", "PNG")))
{
$backgroundColor = imagecolorallocate($target, 255, 255, 255);
imagefill($target, 0, 0, $backgroundColor);
}
}
if (preg_match("/.jpg$/i", $_GET['filename'])) $source = ImageCreateFromJPEG($_GET['filename']);
if (preg_match("/.gif$/i", $_GET['filename'])) $source = ImageCreateFromGIF($_GET['filename']);
if (preg_match("/.png$/i", $_GET['filename'])) $source = ImageCreateFromPNG($_GET['filename']);
imagecopyresampled($target,$source,0,0,$xoord,$yoord,$_GET['size'],$_GET['size'],$width,$height);
imagedestroy($source);
if ($get_filename_type == "JPG") $source = imagecreatefromjpeg($get_filename);
if ($get_filename_type == "GIF") $source = imagecreatefromgif($get_filename);
if ($get_filename_type == "PNG") $source = imagecreatefrompng($get_filename);
imagecopyresampled($target, $source, 0, 0, $xoord, $yoord, $get_size, $get_size, $width, $height);
imagedestroy($source);
//if (preg_match("/.jpg$/i", $_GET['filename'])) ImageJPEG($target,null,90);
//if (preg_match("/.gif$/i", $_GET['filename'])) ImageGIF($target,null,90);
//if (preg_match("/.png$/i", $_GET['filename'])) ImageJPEG($target,null,90); // Using ImageJPEG on purpose
//proper rotation by jan niggemann
if ($degrees != 0)
{
//proper rotation by jan niggemann
if ($degrees != 0)
{
$target = imagerotate($target, $degrees, 0);
}
}
ob_start(); // Start output buffering.
header('Content-type: image/jpeg'); // We always render the thumbnail in JPEG even if the source is GIF or PNG.
//proper mirror (aka flip) by jan niggemann
if ($flip == 'vertical')
{
//proper mirror (aka flip) by jan niggemann
if ($flip == 'vertical')
{
//only in php >= 5.5.0 ImageJPEG(imageflip($target, IMG_FLIP_VERTICAL),null,80);
flipVertical($target);
flipHorizontal($target);
flipVertical($target);
}
ImageJPEG($target,null,80);
}
imagedestroy($target);
ob_start(); // Start output buffering.
header('Content-type: image/jpeg'); // We always render the thumbnail in JPEG even if the source is GIF or PNG.
imagejpeg($target, null, 80);
imagedestroy($target);
$cachedImage = ob_get_contents(); // Get the buffer content.
ob_end_flush(); // End buffering
$cachedImage = ob_get_contents(); // Get the buffer content.
ob_end_flush();// End buffering
if (is_writable(dirname($thumbname))) {
if (is_writable(dirname($thumbname)))
{
$fd = fopen($thumbname, "w"); // Save buffer to disk
if ($fd)
{
fwrite($fd,$cachedImage);
fclose($fd);
}
}
}
?>