功能强大的PHP图片处理类(水印、透明度、旋转)

<?php 
class picture{ 
  var $picture_url; //要处理的图片 
   var $dest_url = "temp__01.jpg"; //生成目标图片位置 
   var $picture_create; //要创建的图片 
   var $ture_color; //新建一个真彩图象 
  
  
   var $picture_width; //原图片宽度 
   var $picture_height; //原图片高度 
  
  
  /** 
   * 水印的类型，默认的为水印文字 
   */ 
   var $mark_type = 1; 
   var $word; //经过utf-8后的文字 
   var $word_x; //文字横坐标 
   var $word_y; //文字纵坐标 
   var $font_type; //字体类型 
   var $font_size = "12"; //字体大小 
   var $font_word; //文字 
   var $angle = 0; //文字的角度，默认为0 
   var $font_color = "#000000"; //文字颜色 
   var $font_path = "font/simkai.ttf"; //字体库，默认为宋体 
   var $force_url; //水印图片 
   var $force_x = 0; //水印横坐标 
   var $force_y = 0; //水印纵坐标 
   var $force_start_x = 0; //切起水印的图片横坐标 
   var $force_start_y = 0; //切起水印的图片纵坐标 
  
  
   var $picture_type; //图片类型 
   var $picture_mime; //输出的头部 
  
  
  /** 
   * 缩放比例为1的话就按缩放高度和宽度缩放 
   */ 
   var $zoom = 1; //缩放类型 
   var $zoom_multiple; //缩放比例 
   var $zoom_width; //缩放宽度 
   var $zoom_height; //缩放高度 
  
  
  /** 
   * 裁切，按比例和固定长度、宽度 
   */ 
   var $cut_type = 1; //裁切类型 
   var $cut_x = 0; //裁切的横坐标 
   var $cut_y = 0; //裁切的纵坐标 
   var $cut_width = 100; //裁切的宽度 
   var $cut_height = 100; //裁切的高度 
  
  
  /** 
   * 锐化 
   */ 
   var $sharp = "7.0"; //锐化程度 
  
  
  /** 
   * 透明度处理 
   */ 
   var $alpha = '100'; //透明度在0-127之间 
   var $alpha_x = "90"; 
   var $alpha_y = "50"; 
  
  /** 
   * 任意角度旋转 
   */ 
   var $circumrotate = "90.0"; //注意，必须为浮点数 
  
  
  /** 
   * 出错信息 
   */ 
   var $error = array( 
    'unalviable' => '没有找到相关图片!' 
    ); 
  
  /** 
   * 构造函数：函数初始化 
   */ 
   function __construct($picture_url){ 
    
     $this -> get_info($picture_url); 
    
     } 
   function get_info($picture_url){ 
    /** 
     * 处理原图片的信息,先检测图片是否存在,不存在则给出相应的信息 
     */ 
     @$size = getimagesize($picture_url); 
     if(!$size){ 
       exit($this -> error['unalviable']); 
       } 
    
     // 得到原图片的信息类型、宽度、高度 
    $this -> picture_mime = $size['mime']; 
     $this -> picture_width = $size[0]; 
     $this -> picture_height = $size[1]; 
    
     // 创建图片 
    switch($size[2]){ 
     case 1: 
       $this -> picture_create = imagecreatefromgif($picture_url); 
       $this -> picture_type = "imagejpeg"; 
       $this -> picture_ext = "jpg"; 
       break; 
     case 2: 
       $this -> picture_create = imagecreatefromjpeg($picture_url); 
       $this -> picture_type = "imagegif"; 
       $this -> picture_ext = "gif"; 
       break; 
     case 3: 
       $this -> picture_create = imagecreatefrompng($picture_url); 
       $this -> picture_type = "imagepng"; 
       $this -> picture_ext = "png"; 
       break; 
       } 
    
    /** 
     * 文字颜色转换16进制转换成10进制 
     */ 
     preg_match_all("/([0-f]){2,2}/i", $this -> font_color, $matches); 
     if(count($matches) == 3){ 
     $this -> red = hexdec($matches[0][0]); 
     $this -> green = hexdec($matches[0][1]); 
     $this -> blue = hexdec($matches[0][2]); 
     } 
   } 
 
 # end of __construct 
/** 
 * 将16进制的颜色转换成10进制的（r，g，b） 
 */ 
function hex2dec(){ 
   preg_match_all("/([0-f]){2,2}/i", $this -> font_color, $matches); 
   if(count($matches) == 3){ 
     $this -> red = hexdec($matches[0][0]); 
     $this -> green = hexdec($matches[0][1]); 
     $this -> blue = hexdec($matches[0][2]); 
     } 
   } 
 
 // 缩放类型 
function zoom_type($zoom_type){ 
   $this -> zoom = $zoom_type; 
   } 
 
 // 对图片进行缩放,如果不指定高度和宽度就进行缩放 
function zoom(){ 
   // 缩放的大小 
  if($this -> zoom == 0){ 
     $this -> zoom_width = $this -> picture_width * $this -> zoom_multiple; 
     $this -> zoom_height = $this -> picture_height * $this -> zoom_multiple; 
     } 
   // 新建一个真彩图象 
  $this -> true_color = imagecreatetruecolor($this -> zoom_width, $this -> zoom_height); 
   $white = imagecolorallocate($this -> true_color, 255, 255, 255); 
   imagefilledrectangle($this -> true_color, 0, 0, $this -> zoom_width, $this -> zoom_height, $white); 
   imagecopyresized($this -> true_color, $this -> picture_create, 0, 0, 0, 0, $this -> zoom_width, $this -> zoom_height, $this -> picture_width, $this -> picture_height); 
   } 
 
 # end of zoom 
// 裁切图片,按坐标或自动 
function cut(){ 
   $this -> true_color = imagecreatetruecolor($this -> cut_width, $this -> cut_width); 
   imagecopy($this -> true_color, $this -> picture_create, 0, 0, $this -> cut_x, $this -> cut_y, $this -> cut_width, $this -> cut_height); 
   } 
 
 # end of cut 
/** 
 * 在图片上放文字或图片 
 * 水印文字 
 */ 
function _mark_text(){ 
   $this -> true_color = imagecreatetruecolor($this -> picture_width, $this -> picture_height); 
   $this -> word = mb_convert_encoding($this -> font_word, 'utf-8', 'gb2312'); 
  /** 
   * 取得使用 truetype 字体的文本的范围 
   */ 
   $temp = imagettfbbox($this -> font_size, 0, $this -> font_path, $this -> word); 
   $word_length = strlen($this -> word); 
   $word_width = $temp[2] - $temp[6]; 
   $word_height = $temp[3] - $temp[7]; 
  /** 
   * 文字水印的默认位置为右下角 
   */ 
   if($this -> word_x == ""){ 
     $this -> word_x = $this -> picture_width - $word_width; 
     } 
   if($this -> word_y == ""){ 
     $this -> word_y = $this -> picture_height - $word_height; 
     } 
   imagesettile($this -> true_color, $this -> picture_create); 
   imagefilledrectangle($this -> true_color, 0, 0, $this -> picture_width, $this -> picture_height, img_color_tiled); 
   $text2 = imagecolorallocate($this -> true_color, $this -> red, $this -> green, $this -> blue); 
   imagettftext($this -> true_color, $this -> font_size, $this -> angle, $this -> word_x, $this -> word_y, $text2, $this -> font_path, $this -> word); 
   } 
 
/** 
 * 水印图片 
 */ 
 function _mark_picture(){ 
  
  /** 
   * 获取水印图片的信息 
   */ 
   @$size = getimagesize($this -> force_url); 
   if(!$size){ 
     exit($this -> error['unalviable']); 
     } 
   $force_picture_width = $size[0]; 
   $force_picture_height = $size[1]; 
   // 创建水印图片 
  switch($size[2]){ 
   case 1: 
     $force_picture_create = imagecreatefromgif($this -> force_url); 
     $force_picture_type = "gif"; 
     break; 
   case 2: 
     $force_picture_create = imagecreatefromjpeg($this -> force_url); 
     $force_picture_type = "jpg"; 
     break; 
   case 3: 
     $force_picture_create = imagecreatefrompng($this -> force_url); 
     $force_picture_type = "png"; 
     break; 
     } 
  /** 
   * 判断水印图片的大小，并生成目标图片的大小，如果水印比图片大，则生成图片大小为水印图片的大小。否则生成的图片大小为原图片大小。 
   */ 
   $this -> new_picture = $this -> picture_create; 
   if($force_picture_width > $this -> picture_width){ 
   $create_width = $force_picture_width - $this -> force_start_x; 
   }else{ 
   $create_width = $this -> picture_width; 
   } 
 if($force_picture_height > $this -> picture_height){ 
   $create_height = $force_picture_height - $this -> force_start_y; 
   }else{ 
   $create_height = $this -> picture_height; 
   } 
/** 
 * 创建一个画布 
 */ 
 $new_picture_create = imagecreatetruecolor($create_width, $create_height); 
 $white = imagecolorallocate($new_picture_create, 255, 255, 255); 
/** 
 * 将背景图拷贝到画布中 
 */ 
 imagecopy($new_picture_create, $this -> picture_create, 0, 0, 0, 0, $this -> picture_width, $this -> picture_height); 
 
/** 
 * 将目标图片拷贝到背景图片上 
 */ 
 imagecopy($new_picture_create, $force_picture_create, $this -> force_x, $this -> force_y, $this -> force_start_x, $this -> force_start_y, $force_picture_width, $force_picture_height); 
 $this -> true_color = $new_picture_create; 
 } 
 # end of mark 
function alpha_(){ 
 $this -> true_color = imagecreatetruecolor($this -> picture_width, $this -> picture_height); 
 $rgb = "#cdcdcd"; 
 $tran_color = "#000000"; 
 for($j = 0;$j <= $this -> picture_height-1;$j++){ 
   for ($i = 0;$i <= $this -> picture_width-1;$i++) 
  { 
     $rgb = imagecolorat($this -> picture_create, $i, $j); 
     $r = ($rgb >> 16) & 0xff; 
     $g = ($rgb >> 8) & 0xff; 
     $b = $rgb & 0xff; 
     $now_color = imagecolorallocate($this -> picture_create, $r, $g, $b); 
     if ($now_color == $tran_color) 
    { 
       continue; 
       } 
    else 
      { 
       $color = imagecolorallocatealpha($this -> picture_create, $r, $g, $b, $alpha); 
       imagesetpixel($this -> picture_create, $alpha_x + $i, $alpha_y + $j, $color); 
       } 
     $this -> true_color = $this -> picture_create; 
    
     } 
   } 
 } 
 
/** 
 * 图片旋转: 
 * 沿y轴旋转 
 */ 
 function turn_y(){ 
 $this -> true_color = imagecreatetruecolor($this -> picture_width, $this -> picture_height); 
 for ($x = 0; $x < $this -> picture_width; $x++) 
{ 
   imagecopy($this -> true_color, $this -> picture_create, $this -> picture_width - $x - 1, 0, $x, 0, 1, $this -> picture_height); 
   } 
 } 
/** 
 * 沿x轴旋转 
 */ 
 function turn_x(){ 
   $this -> true_color = imagecreatetruecolor($this -> picture_width, $this -> picture_height); 
   for ($y = 0; $y < $this -> picture_height; $y++){ 
     imagecopy($this -> true_color, $this -> picture_create, 0, $this -> picture_height - $y - 1, 0, $y, $this -> picture_width, 1); 
   } 
 } 
 
/** 
 * 任意角度旋转 
 */ 
 function turn(){ 
   $this -> true_color = imagecreatetruecolor($this -> picture_width, $this -> picture_height); 
   imagecopyresized($this -> true_color, $this -> picture_create, 0, 0, 0, 0, $this -> picture_width, $this -> picture_height, $this -> picture_width, $this -> picture_height); 
   $white = imagecolorallocate($this -> true_color, 255, 255, 255); 
   $this -> true_color = imagerotate ($this -> true_color, $this -> circumrotate, $white); 
 } 
/** 
 * 图片锐化 
 */ 
 function sharp(){ 
   $this -> true_color = imagecreatetruecolor($this -> picture_width, $this -> picture_height); 
   $cnt = 0; 
   for ($x = 0; $x < $this -> picture_width; $x++){ 
     for ($y = 0; $y < $this -> picture_height; $y++){ 
       $src_clr1 = imagecolorsforindex($this -> true_color, imagecolorat($this -> picture_create, $x-1, $y-1)); 
       $src_clr2 = imagecolorsforindex($this -> true_color, imagecolorat($this -> picture_create, $x, $y)); 
       $r = intval($src_clr2["red"] + $this -> sharp * ($src_clr2["red"] - $src_clr1["red"])); 
       $g = intval($src_clr2["green"] + $this -> sharp * ($src_clr2["green"] - $src_clr1["green"])); 
       $b = intval($src_clr2["blue"] + $this -> sharp * ($src_clr2["blue"] - $src_clr1["blue"])); 
       $r = min(255, max($r, 0)); 
       $g = min(255, max($g, 0)); 
       $b = min(255, max($b, 0)); 
       if (($dst_clr = imagecolorexact($this -> picture_create, $r, $g, $b)) == -1) 
         $dst_clr = imagecolorallocate($this -> picture_create, $r, $g, $b); 
       $cnt++; 
       if ($dst_clr == -1) die("color allocate faile at $x, $y ($cnt)."); 
       imagesetpixel($this -> true_color, $x, $y, $dst_clr); 
    } 
  } 
 } 
/** 
 * 将图片反色处理?? 
 */ 
 function return_color(){ 
/** 
 * 创建一个画布 
 */ 
 $new_picture_create = imagecreate($this -> picture_width, $this -> picture_height); 
 $white = imagecolorallocate($new_picture_create, 255, 255, 255); 
/** 
 * 将背景图拷贝到画布中 
 */ 
 imagecopy($new_picture_create, $this -> picture_create, 0, 0, 0, 0, $this -> picture_width, $this -> picture_height); 
 $this -> true_color = $new_picture_create; 
 } 
 
/** 
 * 生成目标图片并显示 
 */ 
 function show(){ 
 // 判断浏览器,若是ie就不发送头 
if(isset($_server['http_user_agent'])) 
  { 
   $ua = strtoupper($_server['http_user_agent']); 
   if(!preg_match('/^.*msie.*\)$/i', $ua)) 
    { 
     header("content-type:$this->picture_mime"); 
     } 
   } 
 $out = $this -> picture_type; 
 $out($this -> true_color); 
 } 
 
/** 
 * 生成目标图片并保存 
 */ 
 function save_picture(){ 
 // 以 jpeg 格式将图像输出到浏览器或文件 
$out = $this -> picture_type; 
 if(function_exists($out)){ 
   // 判断浏览器,若是ie就不发送头 
  if(isset($_server['http_user_agent'])) 
    { 
     $ua = strtoupper($_server['http_user_agent']); 
     if(!preg_match('/^.*msie.*\)$/i', $ua)) 
      { 
       header("content-type:$this->picture_mime"); 
       } 
     } 
   if(!$this -> true_color){ 
     exit($this -> error['unavilable']); 
     }else{ 
     $out($this -> true_color, $this -> dest_url); 
     $out($this -> true_color); 
     } 
   } 
 } 
/** 
 * 析构函数：释放图片 
 */ 
 function __destruct(){ 
/** 
 * 释放图片 
 */ 
 imagedestroy($this -> true_color); 
 imagedestroy($this -> picture_create); 
 } 
 # end of class 
} 
?>