352 lines
7.8 KiB
PHP
352 lines
7.8 KiB
PHP
<?php
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/**
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gd2库图片处理，添加水印
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*/
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class imageChajian extends Chajian
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{
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public $ext; //图片类型
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public $img; //图片对象
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public $mime; //图片对象
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public $path; //图片地址
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public $w = 0;
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public $h = 0;
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public $bool = false;
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public $size = 0;
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public $whbili = 0;//高和宽的比例
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protected function initChajian()
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{
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$this->bool = function_exists('ImageCreate');
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}
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/**
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创建图片对象$rotate旋转角度
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*/
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public function createimg($path,$rotate=0)
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{
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if(!$this->bool)return false;
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$this->bool = false;
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if(!file_exists($path))return false;
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$this->ext = $this->getext($path);
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$this->path = $path;
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$img = $this->createimgobj($path);
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$this->img = $img;
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if(!$img)return false;
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//判断是否旋转
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if($rotate != 0 && $rotate<360 && $rotate>-360){
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$white = $this->color('#ffffff',$img);
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$img = imagerotate($img, $rotate, $white);//旋转
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}
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$this->w = imagesx($this->img);
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$this->h = imagesy($this->img);
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$this->size = ceil(filesize($this->path)/1024);
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$this->whbili = $this->w/$this->h;
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$this->bool = true;
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}
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/**
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获取图片对象
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*/
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public function createimgobj($path)
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{
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$ext = $this->getmime($path);
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$img = false;
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switch ($ext){
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case 'image/gif':
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$img=imagecreatefromgif($path);
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break;
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case 'image/png':
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$img=imagecreatefrompng($path);
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break;
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default:
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$img=imagecreatefromjpeg($path);
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break;
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}
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return $img;
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}
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public function conver($opath, $npath)
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{
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if(!file_exists($opath))return;
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$img = $this->createimgobj($opath);
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$this->saveas($npath, $img);
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}
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/**
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获取图片的格式
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*/
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public function getext($img_name)
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{
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$type = strtolower(substr($img_name,strrpos($img_name,'.')+1));
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return $type;
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}
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public function getmime($img_name)
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{
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$mime = '';
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if(file_exists($img_name)){
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$fileobj = getimagesize($img_name);
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$mime = strtolower($fileobj['mime']);
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$this->mime = $mime;
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}
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return $mime;
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}
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/**
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添加文字水印
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$str 添加文字
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*/
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public function addwater($str,$color='#000000',$size=20,$align='rb')
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{
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if(!$this->bool)return;
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$font = '../fonts/FZZHYJW.TTF'; //方正稚艺简体
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$lw = strlen($str)*($size/2);
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$lh = $size*0.5;
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$color = $this->color($color,$this->img);
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$x = 2;
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$y = 2;
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switch($align){
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case 'rb'://右下角
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$x = $this->w - $lw-2;
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$y = $this->h - $lh-2;
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break;
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case 'tr'://右上角
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$x = $this->w - $lw-2;
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break;
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case 'lb'://左下角
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$y = $this->h - $lh-2;
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break;
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case 'cn'://居中
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$x = ($this->w - $lw) * 0.5;
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$y = ($this->h - $lh) * 0.5;
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break;
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}
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imagettftext($this->img, $size,0, $x, $y, $color, $font, $str);
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$sapath = str_replace('.'.$this->ext.'', '_water.'.$this->ext.'', $this->path);
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$sapath = $this->path;
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$this->saveas($sapath, $this->img);//另存为
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}
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/**
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添加图片水印
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@params $align 图片位置
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*/
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public function imgwater($imgpath,$align='rb')
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{
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if(!$this->bool || !file_exists($imgpath))return;
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list($lw, $lh) = getimagesize($imgpath);
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$logoimg = $this->createimgobj($imgpath);
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$x = 2;
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$y = 2;
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switch($align){
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case 'rb'://右下角
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$x = $this->w - $lw-2;
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$y = $this->h - $lh-2;
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break;
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case 'tr'://右上角
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$x = $this->w - $lw-2;
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break;
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case 'lb'://左下角
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$y = $this->h - $lh-2;
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break;
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case 'cn'://居中
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$x = ($this->w - $lw) * 0.5;
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$y = ($this->h - $lh) * 0.5;
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break;
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}
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imagecopymerge($this->img, $logoimg, $x ,$y ,0 ,0 ,$lw ,$lh, 100);
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$this->saveas($this->path, $this->img);
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}
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/**
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创建颜色
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*/
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public function color($color,$img)
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{
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if(!empty($color)&&(strlen($color)==7)){
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$r=hexdec(substr($color,1,2));
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$g=hexdec(substr($color,3,2));
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$b=hexdec(substr($color,5));
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}else{
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$r=$g=$b='00';
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}
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return imagecolorallocate($img, $r, $g, $b);
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}
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public function colorTorgb($color)
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{
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if(!empty($color)&&(strlen($color)==7)){
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$r=hexdec(substr($color,1,2));
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$g=hexdec(substr($color,3,2));
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$b=hexdec(substr($color,5));
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}else{
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$r=$g=$b='00';
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}
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return array($r, $g, $b);
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}
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public function colorToHsl($color)
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{
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$rgba = $this->colorTorgb($color);
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$r = floatval($rgba[0])/255;
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$g = floatval($rgba[1])/255;
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$b = floatval($rgba[2])/255;
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$rgb = array($r, $g, $b);
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$max = max($rgb);
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$min = min($rgb);
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$diff = $max - $min;
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if ($max == $min) {
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$h = 0;
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} else if ($max == $r && $g >= $b) {
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$h = 60 * (($g - $b) / $diff);
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} else if ($max == $r && $g < $b) {
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$h = 60 * (($g - $b) / $diff) + 360;
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} else if ($max == $g) {
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$h = 60 * (($b - $r) / $diff) + 120;
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} else if ($max == $b) {
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$h = 60 * (($r - $g) / $diff) + 240;
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}
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$l = ($max + $min) / 2;
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if ($l == 0 || $max == $min) {
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$s = 0;
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} else if (0 < $l && $l <= 0.5) {
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$s = $diff / (2 * $l);
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} else if ($l > 0.5) {
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$s = $diff / (2 - 2 * $l);
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}
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return array($h, round($s*100,2), round($l*100,2));
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}
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/**
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注销图片
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*/
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private function destroy()
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{
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imagedestroy($this->img);
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}
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/**
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另存图片
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*/
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private function saveas($spath,$img)
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{
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$ext = $this->getmime($spath);
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$this->saveass($ext, $img, $spath);
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}
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private function saveass($ext,$img, $spath)
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{
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switch($ext){
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case 'image/gif':
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imagegif($img,$spath);
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break;
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case 'image/png':
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imagepng($img,$spath);
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break;
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case 'image/bmp':
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imagewbmp($img,$spath);
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break;
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default:
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imagejpeg($img,$spath,80);
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break;
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}
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}
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/**
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* 压缩图片
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*/
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public function compress($w,$h)
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{
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if(!$this->bool)return '';
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$bili = 1;
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$nh = $h;
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$nw = $w;
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if($w < $this->w){
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$bili = $w / $this->w;
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$nh = $bili * $this->h;
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}
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if($h>0 && $nh > $h){
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$bili = $h / $this->h;
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$nh = $h;
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$nw = $bili * $this->w;
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}
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if($bili==1)return '';
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$yspath = str_replace('.'.$this->ext.'', 'y.'.$this->ext.'', $this->path);
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return $this->thumbnail($nw, $nh, 0, $yspath);
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}
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/**
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图片缩略图
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@param $w 宽
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@param $h 高
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*/
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public function thumbnail($w,$h,$lx=0, $sapath='')
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{
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if(!$this->bool)return '';
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list($mw, $mh, $bili) = $this->imgwh($w,$h);
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$tmpimg = imagecreatetruecolor($w,$h);
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imagefill($tmpimg,0,0,$this->color('#ffffff',$tmpimg));
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$tx = 0;
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$ty = 0;
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//开始截的位置
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$sx = 0;
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$sy = 0;
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if($w > $mw){
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if($lx==1){//整图缩略可以看到白边
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$tx = ($w-$mw)/2;
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}else if($lx == 0){//可能去掉看不到的
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$mw = $w;
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$mh = $mw/$this->whbili;
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$nbl= $mh/$this->h;
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$sy = ($mh-$h)/2/$nbl; //当前缩放比例
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}
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}
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if($h > $mh){
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if($lx==1){
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$ty = ($h-$mh)/2;
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}else if($lx == 0){
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$mh = $h;
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$mw = $mh*$this->whbili;
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$nbl= $mw/$this->w;
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$sx = ($mw-$w)/2/$nbl; //当前缩放比例
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}
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}
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//imagecopyresized
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imagecopyresampled($tmpimg, $this->img, $tx,$ty, $sx,$sy, $mw,$mh,$this->w,$this->h);//生成缩略图
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//$sapath = str_replace('.'.$this->ext.'', '_thumb'.$w.'x'.$h.'.'.$this->ext.'', $this->path);
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if($sapath=='')$sapath = str_replace('.'.$this->ext.'', '_s.'.$this->ext.'', $this->path);
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$this->saveass($this->mime ,$tmpimg, $sapath);//保存图片
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return $sapath;
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}
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/**
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图片显示宽高
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*/
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public function imgwh($mw,$mh)
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{
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$w = $this->w;
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$h = $this->h;
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$bili=1;
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if($w>$mw){
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$bili=($mw/$w);
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$h=$bili*$h;
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$w=$mw;
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}
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if($h>$mh){
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$bili=($mh/$this->h);
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$w=$bili*$this->w;
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$h=$mh;
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}
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return array($w,$h,$bili);
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}
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} |