<?php
/*
給大家推薦一下！主要包括圖片的裁剪，縮放，加水印等。下面是一些簡單的使用方法。
include("imageclass.php"); //這裡注意imageclass.php的路徑
$imgs=new image();
$imgs->param($tempFile);
if(!$imgs->thumb($targetFile,600,500))die('--圖像上傳失敗！'); //對圖片進行縮放
$imgs->water($targetFile,$water,$pos=0,$pct=50);主要包括兩個參數，$targetFile為已經上傳到服務器的文件路徑，$water為水印圖片,$pos為水印圖片位置，$pct為透明度；
$pos位置說明：
0://隨機
1://1為頂端居左
2://2為頂端居中
3://3為頂端居右
4://4為中部居左
5://5為中部居中
6://6為中部居右
7://7為底端居左
8://8為底端居中
9://9為底端居右
將//裡邊的內容保存在imageclass.php裡邊，就可以調用了。
///////////////////////////////////////////////////////////////
*/
?>
<?php
/* +-------------------------------------------------------------+
* | Copyright (c) 2008-2009 Diqiye.Com All rights reserved.
* +-------------------------------------------------------------+
* | Info : 圖像處理類
* +-------------------------------------------------------------+
*/
class image {
// 當前圖片
protected $img;
// 圖像types 對應表
protected $types = array(
1 => 'gif',
2 => 'jpg',
3 => 'png',
6 => 'bmp'
);
// image
public function __construct($img=''){
!$img && $this->param($img);
}
// Info
public function param($img){
$this->img = $img;
return $this;
}
// imageInfo
public function getImageInfo($img){
$info = @getimagesize($img);
if(isset($this->types[$info[2]])){
$info['ext'] = $info['type'] = $this->types[$info[2]];
} else{
$info['ext'] = $info['type'] = 'jpg';
}
$info['type'] == 'jpg' && $info['type'] = 'jpeg';
$info['size'] = @filesize($img);
return $info;
}
// thumb(新圖地址, 寬, 高, 裁剪, 允許放大)
public function thumb($filename,$new_w=160,$new_h=120,$cut=0,$big=0){
// 獲取原圖信息
$info = $this->getImageInfo($this->img);
if(!empty($info[0])) {
$old_w = $info[0];
$old_h = $info[1];
$type = $info['type'];
$ext = $info['ext'];
unset($info);
// 如果原圖比縮略圖小 並且不允許放大
if($old_w < $new_h && $old_h < $new_w && !$big){
return false;
}
// 裁剪圖片
if($cut == 0){ // 等比列
$scale = min($new_w/$old_w, $new_h/$old_h); // 計算縮放比例
$width = (int)($old_w*$scale); // 縮略圖尺寸
$height = (int)($old_h*$scale);
$start_w = $start_h = 0;
$end_w = $old_w;
$end_h = $old_h;
} elseif($cut == 1){ // center center 裁剪
$scale1 = round($new_w/$new_h,2);
$scale2 = round($old_w/$old_h,2);
if($scale1 > $scale2){
$end_h = round($old_w/$scale1,2);
$start_h = ($old_h-$end_h)/2;
$start_w = 0;
$end_w = $old_w;
} else{
$end_w = round($old_h*$scale1,2);
$start_w = ($old_w-$end_w)/2;
$start_h = 0;
$end_h = $old_h;
}
$width = $new_w;
$height= $new_h;
} elseif($cut == 2){ // left top 裁剪
$scale1 = round($new_w/$new_h,2);
$scale2 = round($old_w/$old_h,2);
if($scale1 > $scale2){
$end_h = round($old_w/$scale1,2);
$end_w = $old_w;
} else{
$end_w = round($old_h*$scale1,2);
$end_h = $old_h;
}
$start_w = 0;
$start_h = 0;
$width = $new_w;
$height= $new_h;
}
// 載入原圖
$createFun = 'ImageCreateFrom'.$type;
$oldimg = $createFun($this->img);
// 創建縮略圖
if($type!='gif' && function_exists('imagecreatetruecolor')){
$newimg = imagecreatetruecolor($width, $height);
} else{
$newimg = imagecreate($width, $height);
}
// 復制圖片
if(function_exists("ImageCopyResampled")){
ImageCopyResampled($newimg, $oldimg, 0, 0, $start_w, $start_h, $width, $height, $end_w,$end_h);
} else{
ImageCopyResized($newimg, $oldimg, 0, 0, $start_w, $start_h, $width, $height, $end_w,$end_h);
}
// 對jpeg圖形設置隔行掃描
$type == 'jpeg' && imageinterlace($newimg,1);
// 生成圖片
$imageFun = 'image'.$type;
!@$imageFun($newimg,$filename,100) && die('保存失敗!檢查目錄是否存在並且可寫?');
ImageDestroy($newimg);
ImageDestroy($oldimg);
return $filename;
}
return false;
}
// water(保存地址,水印圖片,水印位置,透明度)
public function water($filename,$water,$pos=0,$pct=50){
// 加載水印圖片
$info = $this->getImageInfo($water);
if(!empty($info[0])){
$water_w = $info[0];
$water_h = $info[1];
$type = $info['type'];
$fun = 'imagecreatefrom'.$type;
$waterimg = $fun($water);
} else{
return false;
}
// 加載背景圖片
$info = $this->getImageInfo($this->img);
if(!empty($info[0])){
$old_w = $info[0];
$old_h = $info[1];
$type = $info['type'];
$fun = 'imagecreatefrom'.$type;
$oldimg = $fun($this->img);
} else{
return false;
}
// 剪切水印
$water_w >$old_w && $water_w = $old_w;
$water_h >$old_h && $water_h = $old_h;
// 水印位置
switch($pos){
case 0://隨機
$posX = rand(0,($old_w - $water_w));
$posY = rand(0,($old_h - $water_h));
break;
case 1://1為頂端居左
$posX = 0;
$posY = 0;
break;
case 2://2為頂端居中
$posX = ($old_w - $water_w) / 2;
$posY = 0;
break;
case 3://3為頂端居右
$posX = $old_w - $water_w;
$posY = 0;
break;
case 4://4為中部居左
$posX = 0;
$posY = ($old_h - $water_h) / 2;
break;
case 5://5為中部居中
$posX = ($old_w - $water_w) / 2;
$posY = ($old_h - $water_h) / 2;
break;
case 6://6為中部居右
$posX = $old_w - $water_w;
$posY = ($old_h - $water_h) / 2;
break;
case 7://7為底端居左
$posX = 0;
$posY = $old_h - $water_h;
break;
case 8://8為底端居中
$posX = ($old_w - $water_w) / 2;
$posY = $old_h - $water_h;
break;
case 9://9為底端居右
$posX = $old_w - $water_w;
$posY = $old_h - $water_h;
break;
default: //隨機
$posX = rand(0,($old_w - $water_w));
$posY = rand(0,($old_h - $water_h));
break;
}
// 設定圖像的混色模式
imagealphablending($oldimg, true);
// 添加水印
imagecopymerge($oldimg, $waterimg, $posX, $posY, 0, 0, $water_w,$water_h,$pct);
$fun = 'image'.$type;
!@$fun($oldimg, $filename,100) && die('保存失敗!檢查目錄是否存在並且可寫?');
imagedestroy($oldimg);
imagedestroy($waterimg);
return $filename;
}
}
$imgs=new image();
$tempFile = "./images/hdb.jpg";
$water = "./images/bamiluo.jpg";
$imgs->param($tempFile);
//if(!$imgs->thumb($targetFile,600,500))die('fail');
$imgs->water($targetFile,$water,0,10);
echo "aaa";
?>
摘自：ws07_byyy的專欄
