XoopsModules25x / tdmdownloads

class/Common/ImageResizer.php

<?php declare(strict_types=1);

namespace XoopsModules\Tdmdownloads\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.
*/

/**
 * @copyright      module for xoops
 * @license        GPL 2.0 or later
 * @package        wggallery
 * @since          1.0
 * @min_xoops      2.5.9
 * @author         Wedega - Email:<webmaster@wedega.com> - Website:<https://wedega.com>
 */
trait ImageResizer
{
    /**
     * resize image if size exceed given width/height
     * @param        $sourcefile
     * @param string $endfile
     * @param int    $max_width
     * @param int    $max_height
     * @param        $imageMimetype
     * @return string|bool
     */
    public function resizeImage($sourcefile, $endfile, $max_width, $max_height, $imageMimetype)
    {
        // check file extension

        switch ($imageMimetype) {
            case 'image/png':
                $img = \imagecreatefrompng($sourcefile);
                break;
            case 'image/jpeg':
                $img = \imagecreatefromjpeg($sourcefile);
                break;
            case 'image/gif':
                $img = \imagecreatefromgif($sourcefile);
                break;
            default:
                return 'Unsupported format';
        }

        $width = \imagesx($img);

        $height = \imagesy($img);

        if ($width > $max_width || $height > $max_height) {
            // recalc image size based on max_width/max_height

            if ($width > $height) {
                if ($width < $max_width) {
                    $new_width = $width;
                } else {
                    $new_width = $max_width;

                    $divisor = $width / $new_width;

                    $new_height = \floor($height / $divisor);
                }
            } elseif ($height < $max_height) {
                $new_height = $height;
            } else {
                $new_height = $max_height;

                $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($endfile);

            //compressing the file

            switch ($imageMimetype) {
                case 'image/png':
                    \imagepng($tmpimg, $endfile, 0);
                    break;
                case 'image/jpeg':
                    \imagejpeg($tmpimg, $endfile, 100);
                    break;
                case 'image/gif':
                    \imagegif($tmpimg, $endfile);
                    break;
            }

            // release the memory

            \imagedestroy($tmpimg);
        } else {
            return 'copy';
        }

        \imagedestroy($img);

        return true;
    }

    /**
     * @param     $src_url
     * @param     $src_mimetype
     * @param     $dest_url
     * @param     $dest_w
     * @param     $dest_h
     * @param int $quality
     * @return bool|string
     */
    public function resizeAndCrop($src_url, $src_mimetype, $dest_url, $dest_w, $dest_h, $quality = 90)
    {
        // check file extension

        switch ($src_mimetype) {
            case 'image/png':
                $original = \imagecreatefrompng($src_url);
                break;
            case 'image/jpeg':
                $original = \imagecreatefromjpeg($src_url);
                break;
            case 'image/gif':
                $original = \imagecreatefromgif($src_url);
                break;
            default:
                return 'Unsupported format';
        }

        if (!$original) {
            return false;
        }

        // GET ORIGINAL IMAGE DIMENSIONS

        [$original_w, $original_h] = \getimagesize($src_url);

        // RESIZE IMAGE AND PRESERVE PROPORTIONS

        $dest_w_resize = $dest_w;

        $dest_h_resize = $dest_h;

        if ($original_w > $original_h) {
            $dest_h_ratio = $dest_h / $original_h;

            $dest_w_resize = (int)\round($original_w * $dest_h_ratio);
        } else {
            $dest_w_ratio = $dest_w / $original_w;

            $dest_h_resize = (int)\round($original_h * $dest_w_ratio);
        }

        if ($dest_w_resize < $dest_w) {
            $dest_h_ratio = $dest_w / $dest_w_resize;

            $dest_h_resize = (int)\round($dest_h * $dest_h_ratio);

            $dest_w_resize = $dest_w;
        }

        // CREATE THE PROPORTIONAL IMAGE RESOURCE

        $thumb = \imagecreatetruecolor($dest_w_resize, $dest_h_resize);

        if (!\imagecopyresampled($thumb, $original, 0, 0, 0, 0, $dest_w_resize, $dest_h_resize, $original_w, $original_h)) {
            return false;
        }

        // CREATE THE CENTERED CROPPED IMAGE TO THE SPECIFIED DIMENSIONS

        $final = \imagecreatetruecolor($dest_w, $dest_h);

        $dest_w_offset = 0;

        $dest_h_offset = 0;

        if ($dest_w < $dest_w_resize) {
            $dest_w_offset = (int)\round(($dest_w_resize - $dest_w) / 2);
        } else {
            $dest_h_offset = (int)\round(($dest_h_resize - $dest_h) / 2);
        }

        if (!\imagecopy($final, $thumb, 0, 0, $dest_w_offset, $dest_h_offset, $dest_w_resize, $dest_h_resize)) {
            return false;
        }

        // STORE THE FINAL IMAGE - WILL OVERWRITE $dest_url

        if (!\imagejpeg($final, $dest_url, $quality)) {
            return false;
        }

        return true;
    }

    /**
     * @param $src_url
     * @param $dest_url
     * @param $pos
     * @param $of
     */
    public function mergeImage($src_url, $dest_url, $pos, $of)
    {
        $dest = \imagecreatefromjpeg($dest_url);

        $src = \imagecreatefromjpeg($src_url);

        // ImageCopy ( resource $dst_im , resource $src_im , int $dst_x , int $dst_y , int $src_x , int $src_y , int $src_w , int $src_h )

        //        $src = imagecreatefromjpeg($src_url);

        if (4 == $of) {
            switch ($pos) {
                case 1:
                    \imagecopy($dest, $src, 0, 0, 0, 0, 199, 149); //top left
                    break;
                case 2:
                    \imagecopy($dest, $src, 201, 0, 0, 0, 199, 149); //top right
                    break;
                case 3:
                    \imagecopy($dest, $src, 0, 151, 0, 0, 199, 149); //bottom left
                    break;
                case 4:
                    \imagecopy($dest, $src, 201, 151, 0, 0, 199, 149); //bottom right
                    break;
            }
        }

        if (6 == $of) {
            switch ($pos) {
                case 1:
                    \imagecopy($dest, $src, 0, 0, 0, 0, 133, 149); //top left
                    break;
                case 2:
                    \imagecopy($dest, $src, 134, 0, 0, 0, 133, 149); //top center
                    break;
                case 3:
                    \imagecopy($dest, $src, 268, 0, 0, 0, 133, 149); //top right
                    break;
                case 4:
                    \imagecopy($dest, $src, 0, 151, 0, 0, 133, 149); //bottom left
                    break;
                case 5:
                    \imagecopy($dest, $src, 134, 151, 0, 0, 133, 149); //bottom center
                    break;
                case 6:
                    \imagecopy($dest, $src, 268, 151, 0, 0, 133, 149); //bottom right
                    break;
            }
        }

        \imagejpeg($dest, $dest_url);

        \imagedestroy($src);

        \imagedestroy($dest);
    }

    /**
     * resize image if size exceed given width/height
     * @param string $endfile
     * @param int    $max_width
     * @param int    $max_height
     * @return string|bool
     */
    /*     private function resizeImageSave($endfile, $max_width, $max_height){
            // check file extension
            switch ($this->imageMimetype) {
                case'image/png':
                    $img = imagecreatefrompng($this->imagePath);

                    break;
                case'image/jpeg':
                    $img = imagecreatefromjpeg($this->imagePath);
                    break;
                case'image/gif':
                    $img = imagecreatefromgif($this->imagePath);
                    break;
                default:
                    return 'Unsupported format';
            }

            $width  = imagesx($img);
            $height = imagesy($img);

            if ($width > $max_width || $height > $max_height) {
                // recalc image size based on max_width/max_height
                if ($width > $height) {
                    if ($width < $max_width) {
                        $new_width = $width;
                    } else {
                        $new_width  = $max_width;
                        $divisor    = $width / $new_width;
                        $new_height = floor($height / $divisor);
                    }
                } else if($height < $max_height){
                        $new_height = $height;
                    } else {
                        $new_height = $max_height;
                        $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);

                //compressing the file
                switch ($this->imageMimetype) {
                    case'image/png':
                        imagepng($tmpimg, $endfile, 0);
                        break;
                    case'image/jpeg':
                        imagejpeg($tmpimg, $endfile, 100);
                        break;
                    case'image/gif':
                        imagegif($tmpimg, $endfile);
                        break;
                }

                // release the memory
                imagedestroy($tmpimg);
            } else {
                return 'copy';
            }
            imagedestroy($img);
            return true;
        } */
}