本文实例为大家分享了多功能PHP图片处理类,供大家参考,具体内容如下
/**
- 构造方法
- @param unknown $path
*/
function __construct($path=''){
if (!empty($path)) {
$this->path=$path;
}
}
/**
+----------------------------------------------- - 等比缩放函数
+----------------------------------------------- - @param unknown $name 需处理图片的名称
- @param unknown $width 缩放后的宽度
- @param unknown $height 缩放后的高度
- @param string $thumb_prixs 缩放后的前缀名
- @return mixed $newname 返回的缩放后的文件名
*/
function thumb($name,$width,$height,$thumbprixs='th'){
//获取图片信息
$Info=$this->ImageInfo($name); //图片的宽度,高度,类型
//获取图片资源,各种类型的图片都可以创建资源,jpg,gif,png
$imagres=$this->Img_resouce($name,$Info);
//获取计算图片等比例之后的大小,
$size=$this->getNewSize($name,$Info);
//获取新的图片资源,处理透明背景
$newimg=$this->getImage($imagres,$size,$Info);
//另存为一个新的图片,返回新的缩放后的图片名称
$newname=$this->SaveNewImage($newimg,$thumb_prixs.$name,$Info);
return $newname;
}
/**
+-----------------------------------------------------------------------
- 水印标记函数
+----------------------------------------------------------------------- - @param unknown $backname 背景文件名
- @param unknown $watername 水印文件名
- @param number $waterpos 水印位置
- @param string $wa_prixs 水印前缀名
- @return boolean
*/
function waterMark($backname,$watername,$waterpos=0,$waprixs='wa') {
if (file_exists($this->path.$backname) && file_exists($this->path.$watername)) {
$backinfo=$this->ImageInfo($backname);
$waterinfo=$this->ImageInfo($watername);
if(!$pos=$this->getPos($backinfo,$waterinfo,$waterpos)){
echo "水印<a href="https://www.jb51.cc/tag/tupian/" target="_blank" class="keywords">图片</a>不应该比背景<a href="https://www.jb51.cc/tag/tupian/" target="_blank" class="keywords">图片</a>小";
return false;
}
$backimg=$this->Img_resouce($backname,$backinfo);
$waterimg=$this->Img_resouce($watername,$waterinfo);
var_dump($backimg);exit();
$backimg=$this->CopyImage($backimg,$waterimg,$pos,$waterinfo);
$this->SaveNewImage($backimg,$wa_prixs.$backname,$backinfo);
}else{
echo "<a href="https://www.jb51.cc/tag/tupian/" target="_blank" class="keywords">图片</a>或水印不存在";
return false;
}
}
/**
+-----------------------------------------------------------------------
- 获取图片信息函数
+----------------------------------------------------------------------- - @param unknown $name
- @return unknown
*/
private function ImageInfo($img) {
$imageInfo=getimagesize($img);
if ($imageInfo!==false) {
$imageType=strtolower(substr(image_type_to_extension($imageInfo[2]),1));
$imageSize=filesize($img);
$Info=array(
"width" => $imageInfo[0],"height" => $imageInfo[1],"type" => $imageType,"size" => $imageSize,"mime" => $imageInfo['mime']
);
return $Info;
}else{
return false;
}
}
/**
+--------------------------------------------------------
- 创建原图像格式函数
+-------------------------------------------------------- - @param unknown $name
- @param unknown $imaginfo
- @return boolean|resource
*/
private function Img_resouce($name,$imageinfo){
$iamgeres=$this->path.$name;
//var_dump($iamgeres);exit();
switch ($imageinfo['type']) {
case 'gif':
$img=imagecreatefromgif($name);
break;
case 'jpg':
$img=imagecreatefromjpeg($name);
break;
case 'png':
$img=imagecreatefrompng($name);
break;
}
return $img;
}
/**
+-------------------------------------------------- - 获取等比缩放尺寸函数
+-------------------------------------------------- - @param unknown $name
- @param unknown $width
- @param unknown $height
- @param unknown $imaginfo
- @return Ambigous <unknown,number>
/
private function getNewSize($name,$imaginfo){
$size['width']=$imaginfo['width'];
$size['height']=$imaginfo['height'];
if ($width<$imaginfo['width']) {
$size['width']=$width;
}
if ($height<$imaginfo['height']) {
$size['height']=$height;
}
//图像等比例缩放算法
if ($imaginfo['width']$size['width']>$imaginfo['height']$size['height']) {
$size['height']=round($imaginfo['height']$size['width']/$imaginfo['width']);
}else{
$size['width']=round($imaginfo['width']*$size['height']/$imaginfo['height']);
}
return $size;
}
private function getImage($imageres,$imageinfo){
//新建一个真彩色图像
$newimg=imagecreatetruecolor($size['width'],$size['height']);
//将某个颜色定义为透明色
$otsc=imagecolortransparent($imageres);
//获取图像的调色板的颜色数目
if ($otsc>=0&&$otsc<=imagecolorstotal($imageres)) {
//取得某索引的颜色
$stran=imagecolorsforindex($imageres,$otsc);
//为图像分配颜色
$newt=imagecolorallocate($imageres,$stran['red'],$stran['green'],$stran['blue']);
//区域填充函数
imagefill($newimg,$newt);
//为图像定义透明色
imagecolortransparent($newimg,$newt);
}
imagecopyresized($newimg,$imageres,$size['width'],$size['height'],$imageinfo['width'],$imageinfo['height']);
imagedestroy($imageres);
return $newimg;
}
/*
+----------------------------------------------
保存图像函数
+----------------------------------------------
- @param unknown $newimg
- @param unknown $newname
- @param unknown $imageinfo
- @return unknown
*/
private function SaveNewImage($newimg,$newname,$imageinfo){
switch ($imageinfo['type']){
case 1://gif
$result=imagegif($newimg,$this->path.$newname);
break;
case 2://jpg
$result=imagejpeg($newimg,$this->path.$newname);
break;
case 3://png
$result=imagepng($newimg,$this->path.$newname);
break;
}
imagedestroy($newimg);
return $newname;
}
/**
+-----------------------------------------------------------------
- 获取水印位置函数
+----------------------------------------------------------------- - @param unknown $backinfo 背景信息
- @param unknown $waterinfo 水印信息
- @param unknown $waterpos 水印位置
- @return boolean|multitype:number 返回坐标数组
*/
private function getPos($backinfo,$waterpos) {
if ($backinfo['width']<$waterinfo['width']||$backinfo['height']<$waterinfo['height']) {
return false;
}
switch ($waterpos) {
case 1://左上角
$posX=0;
$posY=0;
break;
case 2://中上方
$posX=$backinfo['width']-$waterinfo['width']/2;
$posY=0;
break;
case 3://右上角
$posX=$backinfo['width']-$waterinfo['width'];
$posY=0;
break;
case 4://左中方
$posX=0;
$posY=$backinfo['height']-$waterinfo['height']/2;
break;
case 5://正中间
$posX=$backinfo['width']-$waterinfo['width']/2;
$posY=$backinfo['height']-$waterinfo['height']/2;
break;
case 6://右中方
$posX=$backinfo['width']-$waterinfo['width'];
$posY=$backinfo['height']-$waterinfo['height']/2;
break;
case 7://底部靠左
$posX=0;
$posY=$backinfo['height']-$waterinfo['height'];
break;
case 8://底部居中
$posX=$backinfo['width']-$waterinfo['width']/2;
$posY=$backinfo['height']-$waterinfo['height'];
break;
case 9://底部靠右
$posX=$backinfo['width']-$waterinfo['width'];
$posY=$backinfo['height']-$waterinfo['height'];
break;
case 0:
default :
$posX=rand(0,$backinfo['width']-$waterinfo['width']);
$posY=rand(0,$backinfo['height']-$waterinfo['height']);
break;
}
return array('posX'=>$posX,'posY'=>$posY);
}
/**
+-------------------------------------------------------------------
- 拷贝图像
+------------------------------------------------------------------- - @param unknown $backimg 背景资源
- @param unknown $waterimg 水印资源
- @param unknown $pos 水印位置
- @param unknown $waterinfo 水印信息
- @return unknown
*/
private function CopyImage($backimg,$waterinfo) {
imagecopy($backimg,$pos['posX'],$pos['posY'],$waterinfo['width'],$waterinfo['height']);
imagedestroy($waterimg);
return $backimg;
}
}
?>