XoopsModules25x / smallworld

class/Common/Resizer.php

<?php

namespace XoopsModules\Smallworld\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);

The variable $new_width does not seem to be defined for all execution paths leading up to this point.

The variable $new_height does not seem to be defined for all execution paths leading up to this point.

            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 (!$original) {
            return false;
        }
        // GET ORIGINAL IMAGE DIMENSIONS
        list($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;
    }
}