339 lines
11 KiB
PHP
339 lines
11 KiB
PHP
<?php
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class WaterMark{
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private $im_src; // 背景图文件
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private $im_src_width; // 背景图宽度
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private $im_src_height; // 背景图高度
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private $src_im; // 由背景图创建的新图
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private $im_water; // 水印图文件
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private $im_water_width; // 水印图宽度
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private $im_water_height; // 水印图高度
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private $water_im; // 由水印图创建的新图
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private $font; // 字体库
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private $font_text; // 文本
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private $font_size; // 字体大小
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private $font_color; // 字体颜色
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private $type; //类型
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private $mime;
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function setImSrc($img,$width = 0){
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$this->im_src = $img;
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//读取背景图片文件
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$srcInfo = @getimagesize($this->im_src);
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$this->im_src_width = $srcInfo[0];
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$this->im_src_height = $srcInfo[1];
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$this->type = $srcInfo[2];
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$this->mime = $srcInfo['mime'];
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//取得背景图片
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$this->src_im = $this->getType($this->im_src, $srcInfo[2]);
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if($width){
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$this->resize($width);
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}
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}
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function setImWater($img){
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$this->im_water = $img;
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//读取水印图片文件
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$waterInfo = @getimagesize($this->im_water);
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$this->im_water_width = $waterInfo[0];
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$this->im_water_height = $waterInfo[1];
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//取得水印图片
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$this->water_im = $this->getType($this->im_water, $waterInfo[2]);
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}
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function setFont($font, $text, $size, $color){
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$this->font = $font;
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$this->font_text = $text;
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$this->font_size = $size;
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//水印文字颜色（'255,255,255'）
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$this->font_color = $color;
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}
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/**
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* 根据文件或URL创建一个新图象
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* @param $img
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* @param $type
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* @return resource
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*/
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function getType($img, $type){
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switch($type){
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case 1:
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$im = imagecreatefromgif($img);
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break;
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case 2:
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$exif = exif_read_data($img, 'EXIF');
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$im = imagecreatefromjpeg($img);
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if($exif!=false){
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switch($exif['Orientation']) {
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case 8:
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$im = imagerotate($im,90,0);
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break;
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case 3:
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$im = imagerotate($im,180,0);
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break;
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case 6:
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$im = imagerotate($im,-90,0);
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break;
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}
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}
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break;
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case 3:
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$im = imagecreatefrompng($img);
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imagesavealpha($im, true);
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break;
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default:break;
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}
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return $im;
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}
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/**
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* 根据位置及水印宽高，获取打印的x/y坐标
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* @param $pos
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* @param $w
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* @param $h
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*/
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function getPos($pos, $w, $h)
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{
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switch($pos){
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case 0://随机
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$posX = rand(0, ($this->im_src_width - $w));
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$posY = rand(0, ($this->im_src_height - $h));
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break;
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case 1://1为顶端居左
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$posX = 0;
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$posY = 0;
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break;
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case 2://2为顶端居中
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$posX = ceil($this->im_src_width - $w) / 2;
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$posY = 0;
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break;
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case 3://3为顶端居右
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$posX = $this->im_src_width - $w;
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$posY = 0;
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break;
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case 4://4为中部居左
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$posX = 0;
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$posY = ceil($this->im_src_height - $h) / 2;
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break;
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case 5://5为中部居中
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$posX = ceil($this->im_src_width - $w) / 2;
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$posY = ceil($this->im_src_height - $h) / 2;
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break;
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case 6://6为中部居右
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$posX = $this->im_src_width - $w;
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$posY = ceil($this->im_src_height - $h) / 2;
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break;
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case 7://7为底端居左
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$posX = 0;
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$posY = $this->im_src_height - $h;
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break;
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case 8://8为底端居中
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$posX = ceil($this->im_src_width - $w) / 2;
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$posY = $this->im_src_height - $h;
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break;
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case 9://9为底端居右
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$posX = $this->im_src_width - $w;
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$posY = $this->im_src_height - $h;
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break;
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default://随机
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$posX = rand(0,($this->im_src_width - $w));
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$posY = rand(0,($this->im_src_height - $h));
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break;
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}
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return array($posX, $posY);
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}
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/**
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* 校验尺寸
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* @param $w
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* @param $h
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* @return boolean
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*/
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function check_range($w, $h){
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if( ($this->im_src_width < $w) || ($this->im_src_height < $h) ){
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return false;
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}
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return true;
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}
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/**
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* 打水印操作
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* @param $is_image 是1否0水印图片
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* @param $image_pos 水印图片位置（0~9）
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* @param $is_text 是1否0水印文字
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* @param $text_pos 水印文字位置（0~9）
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*/
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function mark($is_image=0, $image_pos=0, $is_text=0, $text_pos=0, $mic_x=0, $mic_y=0, $alpha=0, $save=FALSE){
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// 水印图片情况
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if ($is_image)
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{
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// 校验图片大小，太小无法加水印直接返回
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if (!$this->check_range($this->im_water_width, $this->im_water_height)){
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$this->show();
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$this->clean();
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return;
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}
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$posArr = $this->getPos($image_pos, $this->im_water_width, $this->im_water_height);
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$posX = $posArr[0];
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$posY = $posArr[1];
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// 拷贝水印到目标文件
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if($alpha){
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$this->imagecopymerge_alpha($this->src_im, $this->water_im, $posX, $posY, 0, 0, $this->im_water_width, $this->im_water_height, $alpha);
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}else{
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imagecopy($this->src_im, $this->water_im, $posX, $posY, 0, 0, $this->im_water_width, $this->im_water_height);
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}
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}
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// 水印文字情况
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if ($is_text){
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//取得此字体的文本的范围
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$temp = imagettfbbox($this->font_size, 0, $this->font, $this->font_text);
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$w = $temp[2] - $temp[0];
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$h = $temp[1] - $temp[7];
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unset($temp);
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// 校验图片大小，太小无法加水印直接返回
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if (!$this->check_range($w, $h)){
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$this->show();
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$this->clean();
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return;
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}
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$posArr = $this->getPos($text_pos, $w, $h);
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$posX = $posArr[0]+$mic_x;
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$posY = $posArr[1]+$mic_y;
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// 打印文本
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$rgb = explode(',', $this->font_color);
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if (count($rgb) != 3){
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$rgb = $this->hex2rgb($this->font_color);
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file_put_contents('log.txt',$this->font_color);
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$color = imagecolorallocate($this->src_im, $rgb['r'], $rgb['g'], $rgb['b']);
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}else{
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$color = imagecolorallocate($this->src_im, $rgb[0], $rgb[1], $rgb[2]);
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}
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imagettftext($this->src_im, $this->font_size, 0, $posX, $posY, $color, $this->font, $this->font_text);
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}
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// 输出
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$this->show();
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if($save){
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$this->save($save);
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}
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// 清理
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$this->clean();
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}
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/**
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* 输出图像
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*/
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function show() {
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ob_clean();
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header("Content-type: {$this->mime}; charset=UTF-8");
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switch ($this->type){
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case 1:
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imagegif($this->src_im);
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break;
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case 2:
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imagejpeg($this->src_im);
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break;
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default :
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imagepng($this->src_im);
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}
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}
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/**
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* 存储图像
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*/
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function save($file){
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switch ($this->type){
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case 1:
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imagegif($this->src_im,$file);
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break;
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case 2:
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imagejpeg($this->src_im,$file);
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break;
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default :
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imagepng($this->src_im,$file);
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}
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}
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/**
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* 清理
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*/
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function clean(){
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imagedestroy($this->water_im);
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imagedestroy($this->src_im);
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}
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/**
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* 将十六进制颜色转为RGB
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* @param type $hexColor
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* @return array
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*/
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function hex2rgb($hexColor) {
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$color = substr($hexColor,1);
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if (strlen($color) > 3) {
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$rgb = array(
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'r' => hexdec(substr($color, 0, 2)),
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'g' => hexdec(substr($color, 2, 2)),
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'b' => hexdec(substr($color, 4, 2))
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);
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} else {
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$color = $hexColor;
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$r = substr($color, 0, 1) . substr($color, 0, 1);
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$g = substr($color, 1, 1) . substr($color, 1, 1);
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$b = substr($color, 2, 1) . substr($color, 2, 1);
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$rgb = array(
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'r' => hexdec($r),
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'g' => hexdec($g),
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'b' => hexdec($b)
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);
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}
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return $rgb;
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}
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function imagecopymerge_alpha($dst_im, $src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h, $pct){
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$opacity=$pct;
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// getting the watermark width
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$w = imagesx($src_im);
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// getting the watermark height
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$h = imagesy($src_im);
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// creating a cut resource
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$cut = imagecreatetruecolor($src_w, $src_h);
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// copying that section of the background to the cut
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imagecopy($cut, $dst_im, 0, 0, $dst_x, $dst_y, $src_w, $src_h);
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// inverting the opacity
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$opacity = 100 - $opacity;
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// placing the watermark now
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imagecopy($cut, $src_im, 0, 0, $src_x, $src_y, $src_w, $src_h);
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imagecopymerge($dst_im, $cut, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h, $opacity);
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}
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/**
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* 重设图片大小
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*
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* @param type $maxwidth
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*/
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function resize($maxwidth=600){
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$im = $this->src_im;
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$width = imagesx($im);
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$height = imagesy($im);
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if($maxwidth && $width > $maxwidth){
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$ratio = $maxwidth/$width;
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$this->im_src_width = $width * $ratio;
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$this->im_src_height = $height * $ratio;
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if(function_exists("imagecopyresampled")){
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$newim = imagecreatetruecolor($this->im_src_width , $this->im_src_height);
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if(3 === $this->type){
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imagealphablending($newim, false);
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imagesavealpha($newim, true);
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}
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imagecopyresampled($newim, $im, 0, 0, 0, 0, $this->im_src_width , $this->im_src_height, $width, $height);
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}else{
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$newim = imagecreate($this->im_src_width , $this->im_src_height);
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if(3 === $this->type){
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imagealphablending($newim, false);
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imagesavealpha($newim, true);
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}
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imagecopyresized($newim, $im, 0, 0, 0, 0, $this->im_src_width , $this->im_src_height, $width, $height);
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}
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$this->src_im = $newim;
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}
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}
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}
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?>
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