-
//PHP 添加水印 & 比例缩略图 & 固定高度 & 固定宽度 类。
- class Image_process{
- public $source; //原图
- public $source_width; //原图宽度
- public $source_height; //原图高度
- public $source_type_id;
- public $orign_name;
- public $orign_dirname;
-
- //传入原图路径
- public function __construct($source){
- $this->typeList = array(1=>'gif',2=>'jpg',3=>'png');
- $ginfo = getimagesize($source);
- $this->source_width = $ginfo[0];
- $this->source_height = $ginfo[1];
- $this->source_type_id = $ginfo[2];
- $this->orign_url = $source;
- $this->orign_name = basename($source);
- $this->orign_dirname = dirname($source);
- }
-
- //判断图片的文件的格式，返回PHP可识别的编码
- public function judgeType($type,$source){
- if($type == 1){
- return imagecreatefromgif($source); //gif
- }else if($type == 2){
- return imagecreatefromjpeg($source); //jpg
- }else if($type == 3){
- return imagecreatefrompng($source); //png
- }else{
- return false;
- }
- }
-
- //生成水印图片
- public function waterMakeImage($logo){
- $linfo = getimagesize($logo);
- $logo_width = $linfo[0];
- $logo_height = $linfo[1];
- $logo_type_id = $linfo[2];
- $sourceHandle = $this->judgeType($this->source_type_id,$this->orign_url);
- $logoHandle = $this->judgeType($logo_type_id,$logo);
- if(!$sourceHandle || !$logoHandle){
- return false;
- }
- $x = ($this->source_width - $logo_width)/2;
- $y = ($this->source_height - $logo_height)/2;
- imagecopy($sourceHandle,$logoHandle,$x,$y,0,0,$logo_width,$logo_height);
- $newPic = $this->orign_dirname.'\water_'.time().'.'.$this->typeList[$this->source_type_id];
- if($this->saveImage($sourceHandle,$newPic)){
- imagedestroy($sourceHandle);
- imagedestroy($logoHandle);
- }
- }
-
- //固定高度宽度
- public function fixSizeImage($width,$height){
- if($width > $this->source_width) $this->source_width;
- if($height > $this->source_height) $this->source_height;
- if($width === false){
- $width = floor($this->source_width / ($this->source_height / $height));
- }
- if($height === false){
- $height = floor($this->source_height / ($this->source_width / $width));
- }
- $this->tinyImage($width,$height);
- }
-
- //等比例缩放图片
- public function scaleImage($scale){
- $width = floor($this->source_width * $scale);
- $height = floor($this->source_height * $scale);
- $this->tinyImage($width, $height);
- }
-
- //创建缩略图
- public function tinyImage($width,$height){
- $tinyImage = imagecreatetruecolor($width,$height);
- $handle = $this->judgeType($this->source_type_id,$this->orign_url);
- if(function_exists('imagecopyresampled')){
- imagecopyresampled($tinyImage, $handle, 0, 0, 0, 0, $width, $height, $this->source_width, $this->source_height);
- }else{
- imagecopyresized($tinyImage, $handle, 0, 0, 0, 0, $width, $height, $this->source_width, $this->source_height);
- }
- $newPic = $this->orign_dirname.'\thumb_'.time().'_'.$width."_".$height.".".$this->typeList[$this->source_type_id];
- if($this->saveImage($tinyImage,$newPic)){
- imagedestroy($tinyImage);
- imagedestroy($handle);
- }
- }
- //保存图片
- private function saveImage($image,$url){
- if(imagejpeg($image,$url)){
- return true;
- }
- }
- }
- $imgHandle = new Image_process('D:\AppServ\www\test\getimg\14061907445601.jpg');
- //$imgHandle->waterMakeImage('D:\AppServ\www\test\getimg\shougongke.png'); //生成水印图片
- //$imgHandle->fixSizeImage(200,150); //固定长度图片
- $imgHandle->scaleImage(0.2); //等比例缩放
- ?>
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