php实现的通用图片处理类

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
}
?>

希望本文所述对大家的php程序设计有所帮助。