PHP实例：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); 
 } 
 
/** 
 * 生成目标图片并保留 
 */ 
 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 
} 
?>