126 lines
3.4 KiB
PHP
126 lines
3.4 KiB
PHP
<?php
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namespace top\extend;
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/**
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* 水印处理类
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* @author topnuomi
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*/
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class Water
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{
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/**
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* 错误信息
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* @var int|string|boolean
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*/
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private $error = false;
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/**
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* 水印文件
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* @var [type]
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*/
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private $waterPath = '';
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public function __construct()
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{
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}
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/**
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* 获取错误信息
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* @return int|string|boolean 错误信息
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*/
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public function getError()
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{
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return $this->error;
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}
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/**
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* 指定水印文件
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* @param string $file [description]
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*/
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public function waterFile($file = '')
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{
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$this->waterPath = $file;
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}
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/**
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* 图片合成
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* @param string $file 处理后的文件路径
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* @param boolean $cover 是否覆盖原始图片
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* @return string 文件名
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*/
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private function addWater($file, $cover)
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{
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if ($this->waterPath == '') {
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$this->error = '请先调用waterFile方法来指定水印文件';
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return false;
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}
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$fileString = file_get_contents($file);
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$waterString = file_get_contents($this->waterPath);
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$image = imagecreatefromstring($fileString);
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$water = imagecreatefromstring($waterString);
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$filesize = getimagesize($file);
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list($fileWidth, $fileHeight) = $filesize;
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list($waterWidth, $waterHeight, $waterType) = getimagesize($this->waterPath);
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$positionX = $fileWidth - $waterWidth;
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$positionY = $fileHeight - $waterHeight;
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imagecopy($image, $water, $positionX, $positionY, 0, 0, $waterWidth, $waterHeight);
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// 取出原始图片信息
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$basename = basename($file);
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$dir = dirname($file) . '/';
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if (!$cover) {
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$secName = '_water';
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} else {
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$secName = '';
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@unlink($file);
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}
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$filenameArr = explode('.', $basename);
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// 原始文件后缀
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// $suffix = end($filenameArr);
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unset($filenameArr[count($filenameArr) - 1]);
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// 准备保存的文件名
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$name = implode('', $filenameArr) . $secName;
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$filename = '';
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// 按mime类型调用对应方法合成图片
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switch ($filesize['mime']) {
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case 'image/jpeg':
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$filename = $dir . $name . '.jpg';
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imagejpeg($image, $filename);
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break;
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case 'image/png':
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$filename = $dir . $name . '.png';
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imagepng($image, $filename);
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break;
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case 'image/gif':
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$filename = $dir . $name . '.gif';
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imagegif($image, $filename);
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break;
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}
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if (!$filename) {
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$this->error = '图片合成失败';
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return false;
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}
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return $filename;
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}
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/**
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* 处理图片
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* @param string $file 处理的文件
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* @param boolean $cover 是否覆盖原始图片，默认覆盖
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* @return boolean 成功|失败
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*/
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public function handler($file = '', $cover = true)
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{
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if ($file == '') {
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$this->error = '请指定要处理的图片文件';
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return false;
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}
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$filename = $this->addWater($file, $cover);
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if ($filename) {
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return $filename;
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} else {
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$this->error = '水印添加失败';
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return false;
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}
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}
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}
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