php实现的通用图片处理类

发布:smiling　来源: PHP粉丝网　添加日期：2021-05-18 09:23:29　浏览: 评论：0　

这篇文章主要介绍了php实现的通用图片处理类,可实现针对图片的缩放、剪切、相框、水印、锐化、旋转、翻转、透明度、反色等功能,具有一定参考借鉴价值,需要的朋友可以参考下。

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。

<?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_;//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_;

    $this->PICTURE_HEIGHT=$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 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

}

?>