class/Common/Resizer.php
<?php
namespace XoopsModules\Groupmanager\Common;
/*
You may not change or alter any portion of this comment or credits
of supporting developers from this source code or any supporting source code
which is considered copyrighted (c) material of the original comment or credit authors.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/
/**
* Image resizer class for xoops
*
* @copyright 2000-2020 XOOPS Project (https://xoops.org)
* @license GPL 2.0 or later
* @package XOOPS common
* @since 1.0
* @min_xoops 2.5.9
* @author Goffy - Wedega - Email:<webmaster@wedega.com> - Website:<https://wedega.com>
*/
class Resizer
{
public $sourceFile = '';
public $endFile = '';
public $maxWidth = 0;
public $maxHeight = 0;
public $imageMimetype = '';
public $jpgQuality = 90;
public $mergeType = 0;
public $mergePos = 0;
public $degrees = 0;
public $error = '';
/**
* resize image if size exceed given width/height
* @return string|bool
*/
public function resizeImage()
{
// check file extension
switch ($this->imageMimetype) {
case 'image/png':
$img = \imagecreatefrompng($this->sourceFile);
break;
case 'image/jpeg':
$img = \imagecreatefromjpeg($this->sourceFile);
if (!$img) {
$img = \imagecreatefromstring(file_get_contents($this->sourceFile));
}
break;
case 'image/gif':
$img = \imagecreatefromgif($this->sourceFile);
break;
default:
return 'Unsupported format';
}
$width = \imagesx($img);
$height = \imagesy($img);
if ($width > $this->maxWidth || $height > $this->maxHeight) {
// recalc image size based on this->maxWidth/this->maxHeight
if ($width > $height) {
if ($width < $this->maxWidth) {
$new_width = $width;
} else {
$new_width = $this->maxWidth;
$divisor = $width / $new_width;
$new_height = \floor($height / $divisor);
}
} elseif ($height < $this->maxHeight) {
$new_height = $height;
} else {
$new_height = $this->maxHeight;
$divisor = $height / $new_height;
$new_width = \floor($width / $divisor);
}
// Create a new temporary image.
$tmpimg = \imagecreatetruecolor($new_width, $new_height);
imagealphablending($tmpimg, false);
imagesavealpha($tmpimg, true);
// Copy and resize old image into new image.
\imagecopyresampled($tmpimg, $img, 0, 0, 0, 0, $new_width, $new_height, $width, $height);
\unlink($this->endFile);
//compressing the file
switch ($this->imageMimetype) {
case 'image/png':
\imagepng($tmpimg, $this->endFile, 0);
break;
case 'image/jpeg':
\imagejpeg($tmpimg, $this->endFile, 100);
break;
case 'image/gif':
\imagegif($tmpimg, $this->endFile);
break;
}
// release the memory
\imagedestroy($tmpimg);
} else {
return 'copy';
}
\imagedestroy($img);
return true;
}
/**
* @return bool|string
*/
public function resizeAndCrop()
{
// check file extension
switch ($this->imageMimetype) {
case 'image/png':
$original = \imagecreatefrompng($this->sourceFile);
break;
case 'image/jpeg':
$original = \imagecreatefromjpeg($this->sourceFile);
break;
case 'image/gif':
$original = \imagecreatefromgif($this->sourceFile);
break;
default:
return 'Unsupported format';
}
if (!$original) {
return false;
}
// GET ORIGINAL IMAGE DIMENSIONS
[$original_w, $original_h] = \getimagesize($this->sourceFile);
// RESIZE IMAGE AND PRESERVE PROPORTIONS
$max_width_resize = $this->maxWidth;
$max_height_resize = $this->maxHeight;
if ($original_w > $original_h) {
$max_height_ratio = $this->maxHeight / $original_h;
$max_width_resize = (int)\round($original_w * $max_height_ratio);
} else {
$max_width_ratio = $this->maxWidth / $original_w;
$max_height_resize = (int)\round($original_h * $max_width_ratio);
}
if ($max_width_resize < $this->maxWidth) {
$max_height_ratio = $this->maxWidth / $max_width_resize;
$max_height_resize = (int)\round($this->maxHeight * $max_height_ratio);
$max_width_resize = $this->maxWidth;
}
// CREATE THE PROPORTIONAL IMAGE RESOURCE
$thumb = \imagecreatetruecolor($max_width_resize, $max_height_resize);
if (!\imagecopyresampled($thumb, $original, 0, 0, 0, 0, $max_width_resize, $max_height_resize, $original_w, $original_h)) {
return false;
}
// CREATE THE CENTERED CROPPED IMAGE TO THE SPECIFIED DIMENSIONS
$final = \imagecreatetruecolor($this->maxWidth, $this->maxHeight);
$max_width_offset = 0;
$max_height_offset = 0;
if ($this->maxWidth < $max_width_resize) {
$max_width_offset = (int)\round(($max_width_resize - $this->maxWidth) / 2);
} else {
$max_height_offset = (int)\round(($max_height_resize - $this->maxHeight) / 2);
}
if (!\imagecopy($final, $thumb, 0, 0, $max_width_offset, $max_height_offset, $max_width_resize, $max_height_resize)) {
return false;
}
// STORE THE FINAL IMAGE - WILL OVERWRITE $this->endFile
if (!\imagejpeg($final, $this->endFile, $this->jpgQuality)) {
return false;
}
return true;
}
/**
*
*/
public function mergeImage()
{
$dest = \imagecreatefromjpeg($this->endFile);
$src = \imagecreatefromjpeg($this->sourceFile);
if (4 == $this->mergeType) {
$imgWidth = (int)\round($this->maxWidth / 2 - 1);
$imgHeight = (int)\round($this->maxHeight / 2 - 1);
$posCol2 = (int)\round($this->maxWidth / 2 + 1);
$posRow2 = (int)\round($this->maxHeight / 2 + 1);
switch ($this->mergePos) {
case 1:
\imagecopy($dest, $src, 0, 0, 0, 0, $imgWidth, $imgHeight); //top left
break;
case 2:
\imagecopy($dest, $src, $posCol2, 0, 0, 0, $imgWidth, $imgHeight); //top right
break;
case 3:
\imagecopy($dest, $src, 0, $posRow2, 0, 0, $imgWidth, $imgHeight); //bottom left
break;
case 4:
\imagecopy($dest, $src, $posCol2, $posRow2, 0, 0, $imgWidth, $imgHeight); //bottom right
break;
}
}
if (6 == $this->mergeType) {
$imgWidth = (int)\round($this->maxWidth / 3 - 1);
$imgHeight = (int)\round($this->maxHeight / 2 - 1);
$posCol2 = (int)\round($this->maxWidth / 3 + 1);
$posCol3 = $posCol2 + (int)\round($this->maxWidth / 3 + 1);
$posRow2 = (int)\round($this->maxHeight / 2 + 1);
switch ($this->mergePos) {
case 1:
\imagecopy($dest, $src, 0, 0, 0, 0, $imgWidth, $imgHeight); //top left
break;
case 2:
\imagecopy($dest, $src, $posCol2, 0, 0, 0, $imgWidth, $imgHeight); //top center
break;
case 3:
\imagecopy($dest, $src, $posCol3, 0, 0, 0, $imgWidth, $imgHeight); //top right
break;
case 4:
\imagecopy($dest, $src, 0, $posRow2, 0, 0, $imgWidth, $imgHeight); //bottom left
break;
case 5:
\imagecopy($dest, $src, $posCol2, $posRow2, 0, 0, $imgWidth, $imgHeight); //bottom center
break;
case 6:
\imagecopy($dest, $src, $posCol3, $posRow2, 0, 0, $imgWidth, $imgHeight); //bottom right
break;
}
}
\imagejpeg($dest, $this->endFile);
\imagedestroy($src);
\imagedestroy($dest);
}
/**
* @return bool|string
*/
public function rotateImage()
{
// check file extension
switch ($this->imageMimetype) {
case 'image/png':
$original = \imagecreatefrompng($this->sourceFile);
break;
case 'image/jpeg':
$original = \imagecreatefromjpeg($this->sourceFile);
break;
case 'image/gif':
$original = \imagecreatefromgif($this->sourceFile);
break;
default:
return 'Unsupported format';
}
if (!$original) {
return false;
}
// Rotate
$tmpimg = \imagerotate($original, $this->degrees, 0);
\unlink($this->endFile);
//compressing the file
switch ($this->imageMimetype) {
case 'image/png':
if (!\imagepng($tmpimg, $this->endFile, 0)) {
return false;
}
break;
case 'image/jpeg':
if (!\imagejpeg($tmpimg, $this->endFile, $this->jpgQuality)) {
return false;
}
break;
case 'image/gif':
if (!\imagegif($tmpimg, $this->endFile)) {
return false;
}
break;
}
// release the memory
\imagedestroy($tmpimg);
return true;
}
}