qingjian/app/service/Image.php

<?php

namespace app\service;

use think\Image as TImage;
use app\model\System;

class Image extends File
{
    /**
     * 对图片进行重置大小，并对宽度大于max宽度的等比缩放为宽度为1920
     * milo
     * 2019-10-24修改
     */
    public static function resize($src)
    {
        $max = 1920;
        $realPath = app()->getRootPath() . 'public/' . ltrim($src, '/');
        if (is_file($realPath)) {
            $img = TImage::open($realPath);
            list($img_w, $img_h) = $img->size();
            if ($max > 0 && $img_w > $max) {
                $img->thumb($max, $max * ($img_h / $img_w))->save($realPath);
            }
        }
    }

//    public static function webResize($src, $width = 1920, $height = 500)
//    {
//
//        $realPath = app()->getRootPath() . 'public/' . ltrim($src, '/');
//        if (is_file($realPath)) {
//            $img = TImage::open($realPath);
//            list($img_w, $img_h) = $img->size();
//            if ($width > 0 && $img_w > $width) {
//                $img->thumb($width, $width * ($img_h / $img_w))->save($realPath);
//            }
//            $ext = explode(".", $src);
//            return $ext[0] . "_" . $width . "_" . $height . ".".$ext[1];
//        }
//        return $src;
//    }


    /**
     * 添加水印
     * milo
     * 2018-01-17
     */
    public static function mark($src)
    {
        $rootPath = app()->getRootPath();
        if (!empty($src)) {
            $system = System::getSystem();
            $realPath = $rootPath . 'public/' . ltrim($src, '/');
            if (is_file($realPath)) {
                if ($system['is_mark']) {
                    $mark = $rootPath . ltrim($system['mark_img'], '/');
                    if (is_file($mark)) {
                        $mark_position = $system['mark_position'] ?? 5;
                        $mark_opacity = $system['mark_opacity'] ?? 50;
                        $img = TImage::Open($realPath);
                        $img->water($mark, $mark_position, $mark_opacity)->save($realPath);
                    }
                }
            }
        }
    }

    //获取水印位置键值对
    public static function getMarkPosition()
    {
        return [
            "1" => '上左',
            "2" => '上中',
            "3" => '上右',
            "4" => '中左',
            "5" => '正中',
            "6" => '中右',
            "7" => '下左',
            "8" => '下中',
            "9" => '下右'
        ];
    }

    /**
     * 删除图片
     * milo
     * 2018-01-15
     */
    public static function delImg($src)
    {
        if (!empty(trim($src))) {
            $realPath = app()->getRootPath() . 'public/' . ltrim($src, '/');
            if (file_exists($realPath)) {
                $info = pathinfo($realPath);
                $source = $info['dirname'] . DIRECTORY_SEPARATOR . $info['filename'] . '*.' . $info['extension'];
                foreach (glob($source) as $filename) {
                    if (is_file($filename)) {
                        unlink($filename);
                    }
                }
                clearstatcache();// 清除缓存
            }

        }
    }

    /**
     * 获取缩略图
     * milo
     * 2019-10-24修改
     * 避免跨平台出错，目录分隔符全部转换为'/'
     * app()->getRuntimePath() = app()->getRootPath().'runtime/当前应用模块（api）/'
     */
    public static function getThumb($src, $width = 0, $height = 0, $type = TImage::THUMB_CENTER)
    {
        if (empty($src)) {
            return '';
        }
        $rootPath = app()->getRootPath();
        $realPath = $rootPath . 'public/' . ltrim($src, '/');
        $realPath = str_replace('\\', '/', $realPath);
        if (!file_exists($realPath)) {
            return '';
        }
        $info = pathinfo($src);
        if ($width <= 0 && $height <= 0) {    //高宽都小于或等于0，则返回原图片
            return $src;
        }

        $image = TImage::open($realPath);
        list($imageWidth, $imageHeight) = $image->size();
        if ($width <= 0) {
            $width = floor($height * ($imageWidth / $imageHeight));
        } elseif ($height <= 0) {
            $height = floor($width * ($imageHeight / $imageWidth));
        }
//        if ($width >= $imageWidth || $height >= $imageHeight) {
//            return $src;
//        }

        $thumbName = $info['dirname'] . DIRECTORY_SEPARATOR . $info['filename'] . '_' . $width . '_' . $height . '.' . $info['extension'];
        $realThumbName = $rootPath . 'public/' . ltrim($thumbName, '/');
        $realThumbName = str_replace('\\', '/', $realThumbName);
        if (!file_exists($realThumbName)) {
            $image = TImage::open($realPath);
            $image->thumb($width, $height, $type)->save($realThumbName);
        }

        return str_replace('\\', '/', $thumbName);
    }
}