php实现的通用图片处理类

php  /  管理员 发布于 7年前   154

本文实例讲述了php实现的通用图片处理类。分享给大家供大家参考。具体如下：

该图片处理函数功能：缩放、剪切、相框、水印、锐化、旋转、翻转、透明度、反色，处理并保存历史记录的思路：当有图片有改动时自动生成一张新图片，命名方式可以考虑在原图片的基础上加上步骤，例如：图片名称+__第几步。 在一些需要图片高级处理功能的Web应用中，可以参考这个类。

'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_;    $this->PICTURE_HEIGHT=$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_;gt;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_;  $FORCE_PICTURE_HEIGHT=$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_;gt;FORCE_START_X;  }  else  {    $CREATE_;gt;PICTURE_WIDTH;  }  if($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 markfunction 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}?>

希望本文所述对大家的php程序设计有所帮助。

您可能感兴趣的文章:

• DEDECMS首页调用图片集里的多张图片
• 解决phpcms更换javascript的幻灯片代码调用图片问题
• dedecms 批量提取第一张图片最为缩略图的代码(文章+软件)
• 实现dedecms图集单击图片翻页的功能
• 实现dedecms图集单击图片翻页的功能
• 常用的php图片处理类（水印、等比缩放、固定高宽）分享
• php多功能图片处理类分享(php图片缩放类)
• PHP图片处理类 phpThumb参数用法介绍
• 让php处理图片变得简单 基于gb库的图片处理类附实例代码下载
• 摘自织梦CMS中的图片处理类