Swoole\Image::cropImage PHP Method

    static function cropImage($image, $params, $original_size, $crop_size)
    {
        $qulitity = isset($params['qulitity']) ? $params['qulitity'] : 100;
        $dst_width = isset($params['width']) ? $params['width'] : 90;
        $dst_height = isset($params['height']) ? $params['height'] : 105;
        $image = WEBPATH . $image;
        if (!file_exists($image)) {
            return '错误，图片不存在！';
        }
        $image_info = getimagesize($image);
        if ($image_info["mime"] == "image/jpeg" || $image_info["mime"] == "image/gif" || $image_info["mime"] == "image/png") {
            /**
             * 计算实际裁剪区域，图片是否被缩放，如果不是真实大小，需要计算
             */
            if (isset($params['abs_width'])) {
                $tmp_rate = $params['abs_width'] / $params['width'];
                $crop_size['left'] = $crop_size['left'] * $tmp_rate;
                $crop_size['top'] = $crop_size['top'] * $tmp_rate;
                $crop_size['width'] = $crop_size['width'] * $tmp_rate;
                $crop_size['height'] = $crop_size['height'] * $tmp_rate;
            }
            //裁剪
            $image_new = imagecreatetruecolor($dst_width, $dst_height);
            switch ($image_info["mime"]) {
                case "image/jpeg":
                    $bin_ori = imagecreatefromjpeg($image);
                    break;
                case "image/gif":
                    $bin_ori = imagecreatefromgif($image);
                    break;
                case "image/png":
                    $bin_ori = imagecreatefrompng($image);
                    break;
            }
            imagecopyresampled($image_new, $bin_ori, 0, 0, $crop_size['left'], $crop_size['top'], $dst_width, $dst_height, $crop_size['width'], $crop_size['height']);
            $file_new = WEBPATH . $params['newfile'];
            if (!file_exists(dirname($file_new))) {
                mkdir(dirname($file_new), 0777, true);
            }
            return imagejpeg($image_new, $file_new, $qulitity);
        }
    }