/
resize_img.php
114 lines (101 loc) · 2.92 KB
/
resize_img.php
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<?php
/**
*
* @category modules
* @package oneforall
* @author WBCE Community
* @copyright 2004-2009, Ryan Djurovich
* @copyright 2009-2010, Website Baker Org. e.V.
* @copyright 2019-, WBCE Community
* @link https://www.wbce.org/
* @license http://www.gnu.org/licenses/gpl.html
* @platform WBCE
*
*/
// Resize PNG image
function resizePNG($source, $destination, $new_max_w, $new_max_h) {
// Check if GD is installed
if (extension_loaded('gd') AND function_exists('imagecreatefrompng')) {
// First figure out the size of the image
list($orig_w, $orig_h) = getimagesize($source);
if ($orig_w > $new_max_w) {
$new_w = $new_max_w;
$new_h = intval($orig_h * ($new_w / $orig_w));
if ($new_h > $new_max_h) {
$new_h = $new_max_h;
$new_w = intval($orig_w * ($new_h / $orig_h));
}
} else if ($orig_h > $new_max_h) {
$new_h = $new_max_h;
$new_w = intval($orig_w * ($new_h / $orig_h));
} else {
// Image to small to be downsized
return false;
}
// Now make the image
$source = imagecreatefrompng($source);
$dst_img = imagecreatetruecolor($new_w, $new_h);
// Allow png transparency (full alpha channel information)
imagealphablending($dst_img, false);
imagesavealpha($dst_img, true);
// Resizing
imagecopyresampled($dst_img, $source, 0,0,0,0, $new_w, $new_h, $orig_w, $orig_h);
imagepng($dst_img, $destination);
// Clear memory
imagedestroy($dst_img);
imagedestroy($source);
// Return true
return true;
} else {
return false;
}
}
// Resize JPEG image
function resizeJPEG($source, $destination, $new_max_w, $new_max_h, $quality = 75) {
if (function_exists('exif_read_data')) {
$exif = exif_read_data($source);
}
if ($img = imagecreatefromjpeg($source)) {
$orig_w = imagesx($img);
$orig_h = imagesy($img);
if ($orig_w > $new_max_w) {
$new_w = $new_max_w;
$new_h = intval($orig_h * ($new_w / $orig_w));
if ($new_h > $new_max_h) {
$new_h = $new_max_h;
$new_w = intval($orig_w * ($new_h / $orig_h));
}
} else if ($orig_h > $new_max_h) {
$new_h = $new_max_h;
$new_w = intval($orig_w * ($new_h / $orig_h));
} else {
// Image to small to be downsized
return false;
}
// Resize using appropriate function
if (function_exists('imagecopyresampled')) {
$new_img = imagecreatetruecolor($new_w, $new_h);
imagecopyresampled($new_img, $img, 0,0,0,0, $new_w, $new_h, $orig_w, $orig_h);
} else {
$new_img = imagecreate($new_w , $new_h);
imagecopyresized($new_img, $img, 0,0,0,0, $new_w, $new_h, $orig_w, $orig_h);
}
imagedestroy($img); // Free original image
if (!empty($exif['Orientation'])) {
switch ($exif['Orientation']) {
case 3:
$new_img = imagerotate($new_img, 180, 0);
break;
case 6:
$new_img = imagerotate($new_img, -90, 0);
break;
case 8:
$new_img = imagerotate($new_img, 90, 0);
break;
}
}
imagejpeg($new_img, $destination, $quality);
imagedestroy($new_img);
}
}
?>