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很强的PHP图片处理类

作者:xiaoxiao 来源:未知 发布时间: 2013-12-02 13:56 点击:
/** * 基本图片处理,用于完成图片缩入,水印添加 * 当水印图超过目标图片尺寸时,水印图能自动适应目标图片而缩小 * 水印图可以设置跟背景的合并度 * * Copyright(c) 2005 by ustb99. All rights reserved * * To contact the author write to {@link mailto:ustb80@1

很强的PHP图片处理类

  /**
  * 基本图片处理,用于完成图片缩入,水印添加
  * 当水印图超过目标图片尺寸时,水印图能自动适应目标图片而缩小
  * 水印图可以设置跟背景的合并度
  *
  * Copyright(c) 2005 by ustb99. All rights reserved
  *
  * To contact the author write to {@link mailto:ustb80@163.com}
  *
  * @author 偶然
  * @version $Id: thumb.class.php,v 1.9 2006/09/30 09:31:56 zengjian Exp $
  * @package system
  
  < ?php
  /**
   *  基本图片处理,用于完成图片缩入,水印添加
   *  当水印图超过目标图片尺寸时,水印图能自动适应目标图片而缩小
   *  水印图可以设置跟背景的合并度
   *
   *  Copyright(c) 2005 by ustb99. All rights reserved
   *
   *  To contact the author write to
{@link mailto:ustb80@163.com}
   *
   * @author 偶然
   * @version $Id: thumb.class.php,v 1.9 2006/09/30 09:31:56 zengjian Exp $
   * @package system
   */
  
  /**
   * ThumbHandler
   * @access public
   */
  
  /*
   使用方法:
      自动裁切:
      程序会按照图片的尺寸从中部裁切最大的正方形,并按目标尺寸进行缩略
  
      $t->setSrcImg("img/test.jpg");
      $t->setCutType(1);//这一句就OK了
      $t->setDstImg("tmp/new_test.jpg");
      $t->createImg(60,60);
  
      手工裁切:
      程序会按照指定的位置从源图上取图
  
      $t->setSrcImg("img/test.jpg");
      $t->setCutType(2);//指明为手工裁切
      $t->setSrcCutPosition(100, 100);// 源图起点坐标
      $t->setRectangleCut(300, 200);// 裁切尺寸
      $t->setDstImg("tmp/new_test.jpg");
      $t->createImg(300,200);
  */
  class ThumbHandler
  {
      var $dst_img;// 目标文件
      var $h_src; // 图片资源句柄
      var $h_dst;// 新图句柄
      var $h_mask;// 水印句柄
      var $img_create_quality = 100;// 图片生成质量
      var $img_display_quality = 80;// 图片显示质量,默认为75
      var $img_scale = 0;// 图片缩放比例
      var $src_w = 0;// 原图宽度
      var $src_h = 0;// 原图高度
      var $dst_w = 0;// 新图总宽度
      var $dst_h = 0;// 新图总高度
      var $fill_w;// 填充图形宽
      var $fill_h;// 填充图形高
      var $copy_w;// 拷贝图形宽
      var $copy_h;// 拷贝图形高
      var $src_x = 0;// 原图绘制起始横坐标
      var $src_y = 0;// 原图绘制起始纵坐标
      var $start_x;// 新图绘制起始横坐标
      var $start_y;// 新图绘制起始纵坐标
      var $mask_word;// 水印文字
      var $mask_img;// 水印图片
      var $mask_pos_x = 0;// 水印横坐标
      var $mask_pos_y = 0;// 水印纵坐标
      var $mask_offset_x = 5;// 水印横向偏移
      var $mask_offset_y = 5;// 水印纵向偏移
      var $font_w;// 水印字体宽
      var $font_h;// 水印字体高
      var $mask_w;// 水印宽
      var $mask_h;// 水印高
      var $mask_font_color = "#ffffff";// 水印文字颜色
      var $mask_font = 2;// 水印字体
      var $font_size;// 尺寸
      var $mask_position = 0;// 水印位置
      var $mask_img_pct = 50;// 图片合并程度,值越大,合并程序越低
      var $mask_txt_pct = 50;// 文字合并程度,值越小,合并程序越低
      var $img_border_size = 0;// 图片边框尺寸
      var $img_border_color;// 图片边框颜色
      var $_flip_x=0;// 水平翻转次数
      var $_flip_y=0;// 垂直翻转次数
  
      var $cut_type=0;// 剪切类型
  
  
      var $img_type;// 文件类型
  
      // 文件类型定义,并指出了输出图片的函数
      var $all_type = array(
          "jpg"  => array("output"=>"imagejpeg"),
          "gif"  => array("output"=>"imagegif"),
          "png"  => array("output"=>"imagepng"),
          "wbmp" => array("output"=>"image2wbmp"),
          "jpeg" => array("output"=>"imagejpeg"));
  
      /**
       * 构造函数
       */
      function ThumbHandler()
      {
          $this->mask_font_color = "#ffffff";
          $this->font = 2;
          $this->font_size = 12;
      }
  
      /**
       * 取得图片的宽
       */
      function getImgWidth($src)
      {
          return imagesx($src);
      }
  
      /**
       * 取得图片的高
       */
      function getImgHeight($src)
      {
          return imagesy($src);
      }
  
      /**
       * 设置图片生成路径
       *
       * @param    string    $src_img   图片生成路径
       */
      function setSrcImg($src_img, $img_type=null)
      {
          if(!file_exists($src_img))
          {
              die("图片不存在");
          }
         
          if(!empty($img_type))
          {
              $this->img_type = $img_type;
          }
          else
          {
              $this->img_type = $this->_getImgType($src_img);
          }
         
          $this->_checkValid($this->img_type);
  
          // file_get_contents函数要求php版本>4.3.0
          $src = '';
          if(function_exists("file_get_contents"))
          {
              $src = file_get_contents($src_img);
          }
          else
          {
              $handle = fopen ($src_img, "r");
              while (!feof ($handle))
              {
                  $src .= fgets($fd, 4096);
              }
              fclose ($handle);
          }
          if(empty($src))
          {
              die("图片源为空");
          }
          $this->h_src = @ImageCreateFromString($src);
          $this->src_w = $this->getImgWidth($this->h_src);
          $this->src_h = $this->getImgHeight($this->h_src);
      }
  
      /**
       * 设置图片生成路径
       *
       * @param    string    $dst_img   图片生成路径
       */
      function setDstImg($dst_img)
      {
          $arr  = explode('/',$dst_img);
          $last = array_pop($arr);
          $path = implode('/',$arr);
          $this->_mkdirs($path);
          $this->dst_img = $dst_img;
      }
  
      /**
       * 设置图片的显示质量
       *
       * @param    string      $n    质量
       */
      function setImgDisplayQuality($n)
      {
          $this->img_display_quality = (int)$n;
      }
  
      /**
       * 设置图片的生成质量
       *
       * @param    string      $n    质量
       */
      function setImgCreateQuality($n)
      {
          $this->img_create_quality = (int)$n;
      }
  
      /**
       * 设置文字水印
       *
       * @param    string     $word    水印文字
       * @param    integer    $font    水印字体
       * @param    string     $color   水印字体颜色
       */
      function setMaskWord($word)
      {
          $this->mask_word .= $word;
      }
  
      /**
       * 设置字体颜色
       *
       * @param    string     $color    字体颜色
       */
      function setMaskFontColor($color="#ffffff")
      {
          $this->mask_font_color = $color;
      }
  
      /**
       * 设置水印字体
       *
       * @param    string|integer    $font    字体
       */
      function setMaskFont($font=2)
      {
          if(!is_numeric($font) && !file_exists($font))
          {
              die("字体文件不存在");
          }
          $this->font = $font;
      }
  
      /**
       * 设置文字字体大小,仅对truetype字体有效
       */
      function setMaskFontSize($size = "12")
      {
          $this->font_size = $size;
      }
  
      /**
       * 设置图片水印
       *
       * @param    string    $img     水印图片源
       */
      function setMaskImg($img)
      {
          $this->mask_img = $img;
      }
  
      /**
       * 设置水印横向偏移
       *
       * @param    integer     $x    横向偏移量
       */
      function setMaskOffsetX($x)
      {
          $this->mask_offset_x = (int)$x;
      }
  
      /**
       * 设置水印纵向偏移
       *
       * @param    integer     $y    纵向偏移量
       */
      function setMaskOffsetY($y)
      {
          $this->mask_offset_y = (int)$y;
      }
  
      /**
       * 指定水印位置
       *
       * @param    integer     $position    位置,1:左上,2:左下,3:右上,0/4:右下
       */
      function setMaskPosition($position=0)
      {
          $this->mask_position = (int)$position;
      }
  
      /**
       * 设置图片合并程度
       *
       * @param    integer     $n    合并程度
       */
      function setMaskImgPct($n)
      {
          $this->mask_img_pct = (int)$n;
      }
  
      /**
       * 设置文字合并程度
       *
       * @param    integer     $n    合并程度
       */
      function setMaskTxtPct($n)
      {
          $this->mask_txt_pct = (int)$n;
      }
  
      /**
       * 设置缩略图边框
       *
       * @param    (类型)     (参数名)    (描述)
       */
      function setDstImgBorder($size=1, $color="#000000")
      {
          $this->img_border_size  = (int)$size;
          $this->img_border_color = $color;
      }
  
      /**
       * 水平翻转
       */
      function flipH()
      {
          $this->_flip_x++;
      }
  
      /**
       * 垂直翻转
       */
      function flipV()
      {
          $this->_flip_y++;
      }
  
      /**
       * 设置剪切类型
       *
       * @param    (类型)     (参数名)    (描述)
       */
      function setCutType($type)
      {
          $this->cut_type = (int)$type;
      }
  
      /**
       * 设置图片剪切
       *
       * @param    integer     $width    矩形剪切
       */
      function setRectangleCut($width, $height)
      {
          $this->fill_w = (int)$width;
          $this->fill_h = (int)$height;
      }
  
      /**
       * 设置源图剪切起始坐标点
       *
       * @param    (类型)     (参数名)    (描述)
       */
      function setSrcCutPosition($x, $y)
      {
          $this->src_x  = (int)$x;
          $this->src_y  = (int)$y;
      }
  
      /**
       * 创建图片,主函数
       * @param    integer    $a     当缺少第二个参数时,此参数将用作百分比,
       *                             否则作为宽度值
       * @param    integer    $b     图片缩放后的高度
       */
      function createImg($a, $b=null)
      {
          $num = func_num_args();
          if(1 == $num)
          {
              $r = (int)$a;
              if($r < 1)
              {
                  die("图片缩放比例不得小于1");
              }
              $this->img_scale = $r;
              $this->_setNewImgSize($r);
          }
  
          if(2 == $num)
          {
              $w = (int)$a;
              $h = (int)$b;
              if(0 == $w)
              {
                  die("目标宽度不能为0");
              }
              if(0 == $h)
              {
                  die("目标高度不能为0");
              }
              $this->_setNewImgSize($w, $h);
          }
  
          if($this->_flip_x%2!=0)
          {
              $this->_flipH($this->h_src);
          }
  
          if($this->_flip_y%2!=0)
          {
              $this->_flipV($this->h_src);
          }
          $this->_createMask();
          $this->_output();
  
          // 释放
          if(imagedestroy($this->h_src) && imagedestroy($this->h_dst))
          {
              Return true;
          }
          else
          {
              Return false;
          }
      }
  
      /**
       * 生成水印,调用了生成水印文字和水印图片两个方法
       */
      function _createMask()
      {
          if($this->mask_word)
          {
              // 获取字体信息
              $this->_setFontInfo();
  
              if($this->_isFull())
              {
                  die("水印文字过大");
              }
              else
              {
                  $this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h);
                  $white = ImageColorAllocate($this->h_dst,255,255,255);
                  imagefilledrectangle($this->h_dst,0,0,$this->dst_w,$this->dst_h,$white);// 填充背景色
                  $this->_drawBorder();
                  imagecopyresampled( $this->h_dst, $this->h_src,
                                      $this->start_x, $this->start_y,
                                      $this->src_x, $this->src_y,
                                      $this->fill_w, $this->fill_h,
                                      $this->copy_w, $this->copy_h);
                  $this->_createMaskWord($this->h_dst);
              }
          }
  
          if($this->mask_img)
          {
              $this->_loadMaskImg();//加载时,取得宽高
  
              if($this->_isFull())
              {
                  // 将水印生成在原图上再拷
                  $this->_createMaskImg($this->h_src);
                  $this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h);
                  $white = ImageColorAllocate($this->h_dst,255,255,255);
                  imagefilledrectangle($this->h_dst,0,0,$this->dst_w,$this->dst_h,$white);// 填充背景色
                  $this->_drawBorder();
                  imagecopyresampled( $this->h_dst, $this->h_src,
                                      $this->start_x, $this->start_y,
                                      $this->src_x, $this->src_y,
                                      $this->fill_w, $this->start_y,
                                      $this->copy_w, $this->copy_h);
              }
              else
              {
                  // 创建新图并拷贝
                  $this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h);
                  $white = ImageColorAllocate($this->h_dst,255,255,255);
                  imagefilledrectangle($this->h_dst,0,0,$this->dst_w,$this->dst_h,$white);// 填充背景色
                  $this->_drawBorder();
                  imagecopyresampled( $this->h_dst, $this->h_src,
                                      $this->start_x, $this->start_y,
                                      $this->src_x, $this->src_y,
                                      $this->fill_w, $this->fill_h,
                                      $this->copy_w, $this->copy_h);
                  $this->_createMaskImg($this->h_dst);
              }
          }
  
          if(empty($this->mask_word) && empty($this->mask_img))
          {
              $this->h_dst = imagecreatetruecolor($this->dst_w, $this->dst_h);
              $white = ImageColorAllocate($this->h_dst,255,255,255);
              imagefilledrectangle($this->h_dst,0,0,$this->dst_w,$this->dst_h,$white);// 填充背景色
              $this->_drawBorder();
  
              imagecopyresampled( $this->h_dst, $this->h_src,
                          $this->start_x, $this->start_y,
                          $this->src_x, $this->src_y,
                          $this->fill_w, $this->fill_h,
                          $this->copy_w, $this->copy_h);
          }
      }
  
      /**
       * 画边框
       */
      function _drawBorder()
      {
          if(!empty($this->img_border_size))
          {
              $c = $this->_parseColor($this->img_border_color);
              $color = ImageColorAllocate($this->h_src,$c[0], $c[1], $c[2]);
              imagefilledrectangle($this->h_dst,0,0,$this->dst_w,$this->dst_h,$color);// 填充背景色
          }
      }
  
      /**
       * 生成水印文字
       */
      function _createMaskWord($src)
      {
          $this->_countMaskPos();
          $this->_checkMaskValid();
  
          $c = $this->_parseColor($this->mask_font_color);
          $color = imagecolorallocatealpha($src, $c[0], $c[1], $c[2], $this->mask_txt_pct);
  
          if(is_numeric($this->font))
          {
              imagestring($src,
                          $this->font,
                          $this->mask_pos_x, $this->mask_pos_y,
                          $this->mask_word,
                          $color);
          }
          else
          {
              imagettftext($src,
                          $this->font_size, 0,
                          $this->mask_pos_x, $this->mask_pos_y,
                          $color,
                          $this->font,
                          $this->mask_word);
          }
      }
  
      /**
       * 生成水印图
       */
      function _createMaskImg($src)
      {
          $this->_countMaskPos();
          $this->_checkMaskValid();
          imagecopymerge($src,
                          $this->h_mask,
                          $this->mask_pos_x ,$this->mask_pos_y,
                          0, 0,
                          $this->mask_w, $this->mask_h,
                          $this->mask_img_pct);
  
          imagedestroy($this->h_mask);
      }
  
      /**
       * 加载水印图
       */
      function _loadMaskImg()
      {
          $mask_type = $this->_getImgType($this->mask_img);
          $this->_checkValid($mask_type);
  
          // file_get_contents函数要求php版本>4.3.0
          $src = '';
          if(function_exists("file_get_contents"))
          {
              $src = file_get_contents($this->mask_img);
          }
          else
          {
              $handle = fopen ($this->mask_img, "r");
              while (!feof ($handle))
              {
                  $src .= fgets($fd, 4096);
              }
              fclose ($handle);
          }
          if(empty($this->mask_img))
          {
              die("水印图片为空");
          }
          $this->h_mask = ImageCreateFromString($src);
          $this->mask_w = $this->getImgWidth($this->h_mask);
          $this->mask_h = $this->getImgHeight($this->h_mask);
      }
  
      /**
       * 图片输出
       */
      function _output()
      {
          $img_type  = $this->img_type;
          $func_name = $this->all_type[$img_type]['output'];
          if(function_exists($func_name))
          {
              // 判断浏览器,若是IE就不发送头
              if(isset($_SERVER['HTTP_USER_AGENT']))
              {
                  $ua = strtoupper($_SERVER['HTTP_USER_AGENT']);
                  if(!preg_match('/^.*MSIE.*\)$/i',$ua))
                  {
                      header("Content-type:$img_type");
                  }
              }
              $func_name($this->h_dst, $this->dst_img, $this->img_display_quality);
          }
          else
          {
              Return false;
          }
      }
  
      /**
       * 分析颜色
       *
       * @param    string     $color    十六进制颜色
       */
      function _parseColor($color)
      {
          $arr = array();
          for($ii=1; $ii<strlen ($color); $ii++)
          {
              $arr[] = hexdec(substr($color,$ii,2));
              $ii++;
          }
  
          Return $arr;
      }
  
      /**
       * 计算出位置坐标
       */
      function _countMaskPos()
      {
          if($this->_isFull())
          {
              switch($this->mask_position)
              {
                  case 1:
                      // 左上
                      $this->mask_pos_x = $this->mask_offset_x + $this->img_border_size;
                      $this->mask_pos_y = $this->mask_offset_y + $this->img_border_size;
                      break;
  
                  case 2:
                      // 左下
                      $this->mask_pos_x = $this->mask_offset_x + $this->img_border_size;
                      $this->mask_pos_y = $this->src_h - $this->mask_h - $this->mask_offset_y;
                      break;
  
                  case 3:
                      // 右上
                      $this->mask_pos_x = $this->src_w - $this->mask_w - $this->mask_offset_x;
                      $this->mask_pos_y = $this->mask_offset_y + $this->img_border_size;
                      break;
  
                  case 4:
                      // 右下
                      $this->mask_pos_x = $this->src_w - $this->mask_w - $this->mask_offset_x;
                      $this->mask_pos_y = $this->src_h - $this->mask_h - $this->mask_offset_y;
                      break;
  
                  default:
                      // 默认将水印放到右下,偏移指定像素
                      $this->mask_pos_x = $this->src_w - $this->mask_w - $this->mask_offset_x;
                      $this->mask_pos_y = $this->src_h - $this->mask_h - $this->mask_offset_y;
                      break;
              }
          }
          else
          {
              switch($this->mask_position)
              {
                  case 1:
                      // 左上
                      $this->mask_pos_x = $this->mask_offset_x + $this->img_border_size;
                      $this->mask_pos_y = $this->mask_offset_y + $this->img_border_size;
                      break;
  
                  case 2:
                      // 左下
                      $this->mask_pos_x = $this->mask_offset_x + $this->img_border_size;
                      $this->mask_pos_y = $this->dst_h - $this->mask_h - $this->mask_offset_y - $this->img_border_size;
                      break;
  
                  case 3:
                      // 右上
                      $this->mask_pos_x = $this->dst_w - $this->mask_w - $this->mask_offset_x - $this->img_border_size;
                      $this->mask_pos_y = $this->mask_offset_y + $this->img_border_size;
                      break;
  
                  case 4:
                      // 右下
                      $this->mask_pos_x = $this->dst_w - $this->mask_w - $this->mask_offset_x - $this->img_border_size;
                      $this->mask_pos_y = $this->dst_h - $this->mask_h - $this->mask_offset_y - $this->img_border_size;
                      break;
  
                  default:
                      // 默认将水印放到右下,偏移指定像素
                      $this->mask_pos_x = $this->dst_w - $this->mask_w - $this->mask_offset_x - $this->img_border_size;
                      $this->mask_pos_y = $this->dst_h - $this->mask_h - $this->mask_offset_y - $this->img_border_size;
                      break;
              }
          }
      }
  
      /**
       * 设置字体信息
       */
      function _setFontInfo()
      {
          if(is_numeric($this->font))
          {
              $this->font_w  = imagefontwidth($this->font);
              $this->font_h  = imagefontheight($this->font);
  
              // 计算水印字体所占宽高
              $word_length   = strlen($this->mask_word);
              $this->mask_w  = $this->font_w*$word_length;
              $this->mask_h  = $this->font_h;
          }
          else
          {
              $arr = imagettfbbox ($this->font_size,0, $this->font,$this->mask_word);
              $this->mask_w  = abs($arr[0] - $arr[2]);
              $this->mask_h  = abs($arr[7] - $arr[1]);
          }
      }
  
      /**
       * 设置新图尺寸
       *
       * @param    integer     $img_w   目标宽度
       * @param    integer     $img_h   目标高度
       */
      function _setNewImgSize($img_w, $img_h=null)
      {
          $num = func_num_args();
          if(1 == $num)
          {
              $this->img_scale = $img_w;// 宽度作为比例
              $this->fill_w = round($this->src_w * $this->img_scale / 100) - $this->img_border_size*2;
              $this->fill_h = round($this->src_h * $this->img_scale / 100) - $this->img_border_size*2;
  
              // 源文件起始坐标
              $this->src_x  = 0;
              $this->src_y  = 0;
              $this->copy_w = $this->src_w;
              $this->copy_h = $this->src_h;
  
              // 目标尺寸
              $this->dst_w   = $this->fill_w + $this->img_border_size*2;
              $this->dst_h   = $this->fill_h + $this->img_border_size*2;
          }
  
          if(2 == $num)
          {
              $fill_w   = (int)$img_w - $this->img_border_size*2;
              $fill_h   = (int)$img_h - $this->img_border_size*2;
              if($fill_w < 0 || $fill_h < 0)
              {
                  die("图片边框过大,已超过了图片的宽度");
              }
              $rate_w = $this->src_w/$fill_w;
              $rate_h = $this->src_h/$fill_h;
  
              switch($this->cut_type)
              {
                  case 0:
                      // 如果原图大于缩略图,产生缩小,否则不缩小
                      if($rate_w < 1 && $rate_h < 1)
                      {
                          $this->fill_w = (int)$this->src_w;
                          $this->fill_h = (int)$this->src_h;
                      }
                      else
                      {
                          if($rate_w >= $rate_h)
                          {
                              $this->fill_w = (int)$fill_w;
                              $this->fill_h = round($this->src_h/$rate_w);
                          }
                          else
                          {
                              $this->fill_w = round($this->src_w/$rate_h);
                              $this->fill_h = (int)$fill_h;
                          }
                      }
  
                      $this->src_x  = 0;
                      $this->src_y  = 0;
  
                      $this->copy_w = $this->src_w;
                      $this->copy_h = $this->src_h;
  
                      // 目标尺寸
                      $this->dst_w   = $this->fill_w + $this->img_border_size*2;
                      $this->dst_h   = $this->fill_h + $this->img_border_size*2;
                      break;
  
                  // 自动裁切
                  case 1:
                      // 如果图片是缩小剪切才进行操作
                      if($rate_w >= 1 && $rate_h >=1)
                      {
                          if($this->src_w > $this->src_h)
                          {
                              $src_x = round($this->src_w-$this->src_h)/2;
                              $this->setSrcCutPosition($src_x, 0);
                              $this->setRectangleCut($fill_h, $fill_h);
  
                              $this->copy_w = $this->src_h;
                              $this->copy_h = $this->src_h;
                             
                          }
                          elseif($this->src_w < $this->src_h)
                          {
                              $src_y = round($this->src_h-$this->src_w)/2;
                              $this->setSrcCutPosition(0, $src_y);
                              $this->setRectangleCut($fill_w, $fill_h);
  
                              $this->copy_w = $this->src_w;
                              $this->copy_h = $this->src_w;
                          }
                          else
                          {
                              $this->setSrcCutPosition(0, 0);
                              $this->copy_w = $this->src_w;
                              $this->copy_h = $this->src_w;
                              $this->setRectangleCut($fill_w, $fill_h);
                          }
                      }
                      else
                      {
                          $this->setSrcCutPosition(0, 0);
                          $this->setRectangleCut($this->src_w, $this->src_h);
  
                          $this->copy_w = $this->src_w;
                          $this->copy_h = $this->src_h;
                      }
  
                      // 目标尺寸
                      $this->dst_w   = $this->fill_w + $this->img_border_size*2;
                      $this->dst_h   = $this->fill_h + $this->img_border_size*2;
                     
                      break;
  
                  // 手工裁切
                  case 2:
                      $this->copy_w = $this->fill_w;
                      $this->copy_h = $this->fill_h;
  
                      // 目标尺寸
                      $this->dst_w   = $this->fill_w + $this->img_border_size*2;
                      $this->dst_h   = $this->fill_h + $this->img_border_size*2;               
                     
                      break;
                  default:
                      break;
  
              }
          }
  
          // 目标文件起始坐标
          $this->start_x = $this->img_border_size;
          $this->start_y = $this->img_border_size;
      }
  
      /**
       * 检查水印图是否大于生成后的图片宽高
       */
      function _isFull()
      {
          Return (   $this->mask_w + $this->mask_offset_x > $this->fill_w
                  || $this->mask_h + $this->mask_offset_y > $this->fill_h)
                     ?true:false;
      }
  
      /**
       * 检查水印图是否超过原图
       */
      function _checkMaskValid()
      {
          if(    $this->mask_w + $this->mask_offset_x > $this->src_w
              || $this->mask_h + $this->mask_offset_y > $this->src_h)
          {
              die("水印图片尺寸大于原图,请缩小水印图");
          }
      }
  
      /**
       * 取得图片类型
       *
       * @param    string     $file_path    文件路径
       */
      function _getImgType($file_path)
      {
          $type_list = array("1"=>"gif","2"=>"jpg","3"=>"png","4"=>"swf","5" => "psd","6"=>"bmp","15"=>"wbmp");
          if(file_exists($file_path))
          {
              $img_info = @getimagesize ($file_path);
              if(isset($type_list[$img_info[2]]))
              {
                  Return $type_list[$img_info[2]];
              }
          }
          else
          {
              die("文件不存在,不能取得文件类型!");
          }
      }
  
      /**
       * 检查图片类型是否合法,调用了array_key_exists函数,此函数要求
       * php版本大于4.1.0
       *
       * @param    string     $img_type    文件类型
       */
      function _checkValid($img_type)
      {
          if(!array_key_exists($img_type, $this->all_type))
          {
              Return false;
          }
      }
  
      /**
       * 按指定路径生成目录
       *
       * @param    string     $path    路径
       */
      function _mkdirs($path)
      {
          $adir = explode('/',$path);
          $dirlist = '';
          $rootdir = array_shift($adir);
          if(($rootdir!='.'||$rootdir!='..')&&!file_exists($rootdir))
          {
              @mkdir($rootdir);
          }
          foreach($adir as $key=>$val)
          {
              if($val!='.'&&$val!='..')
              {
                  $dirlist .= "/".$val;
                  $dirpath = $rootdir.$dirlist;
                  if(!file_exists($dirpath))
                  {
                      @mkdir($dirpath);
                      @chmod($dirpath,0777);
                  }
              }
          }
      }
  
      /**
       * 垂直翻转
       *
       * @param    string     $src    图片源
       */
      function _flipV($src)
      {
          $src_x = $this->getImgWidth($src);
          $src_y = $this->getImgHeight($src);
  
          $new_im = imagecreatetruecolor($src_x, $src_y);
          for ($y = 0; $y < $src_y; $y++)
          {
              imagecopy($new_im, $src, 0, $src_y - $y - 1, 0, $y, $src_x, 1);
          }
          $this->h_src = $new_im;
      }
  
      /**
       * 水平翻转
       *
       * @param    string     $src    图片源
       */
      function _flipH($src)
      {
          $src_x = $this->getImgWidth($src);
          $src_y = $this->getImgHeight($src);
  
          $new_im = imagecreatetruecolor($src_x, $src_y);
          for ($x = 0; $x < $src_x; $x++)
          {
              imagecopy($new_im, $src, $src_x - $x - 1, 0, $x, 0, 1, $src_y);
          }
          $this->h_src = $new_im;
      }
  }
  ?>
  使用实例:
  
  < ?php
  require_once('lib/thumb.class.php');
  
  $t = new ThumbHandler();
  
  $t->setSrcImg("img/test.jpg");
  $t->setDstImg("tmp/new_test.jpg");
  $t->setMaskImg("img/test.gif");
  $t->setMaskPosition(1);
  $t->setMaskImgPct(80);
  $t->setDstImgBorder(4,"#dddddd");
  
  // 指定缩放比例
  $t->createImg(300,200);
  ?>
  < ?php
  require_once('lib/thumb.class.php');
  
  $t = new ThumbHandler();
  
  // 基本使用
  $t->setSrcImg("img/test.jpg");
  $t->setMaskWord("test");
  $t->setDstImgBorder(10,"#dddddd");
  
  // 指定缩放比例
  $t->createImg(50);
  ?>
  < ?php
  equire_once('lib/thumb.class.php');
  
  $t = new ThumbHandler();
  
  // 基本使用
  $t->setSrcImg("img/test.jpg");
  $t->setMaskWord("test");
  
  // 指定固定宽高
  $t->createImg(200,200);
  ?>
  < ?php
  require_once('lib/thumb.class.php');
  
  $t = new ThumbHandler();
  
  $t->setSrcImg("img/test.jpg");
  $t->setDstImg("tmp/new_test.jpg");
  $t->setMaskWord("test");
  
  // 指定固定宽高
  $t->createImg(200,200);
  ?>
  < ?php
  require_once('lib/thumb.class.php');
  
  $t = new ThumbHandler();
  
  $t->setSrcImg("img/test.jpg");
  
  // 指定字体文件地址
  $t->setMaskFont("c:/winnt/fonts/arial.ttf");
  $t->setMaskFontSize(20);
  $t->setMaskFontColor("#ffff00");
  $t->setMaskWord("test3333333");
  $t->setDstImgBorder(99,"#dddddd");
  $t->createImg(50);
  
  ?>
  < ?php
  require_once('lib/thumb.class.php');
  
  $t = new ThumbHandler();
  
  $t->setSrcImg("img/test.jpg");
  $t->setMaskOffsetX(55);
  $t->setMaskOffsetY(55);
  $t->setMaskPosition(1);
  //$t->setMaskPosition(2);
  //$t->setMaskPosition(3);
  //$t->setMaskPosition(4);
  $t->setMaskFontColor("#ffff00");
  $t->setMaskWord("test");
  
  // 指定固定宽高
  $t->createImg(50);
  ?>
  < ?php
  require_once('lib/thumb.class.php');
  
  $t = new ThumbHandler();
  
  $t->setSrcImg("img/test.jpg");
  $t->setMaskFont("c:/winnt/fonts/simyou.ttf");
  $t->setMaskFontSize(20);
  $t->setMaskFontColor("#ffffff");
  $t->setMaskTxtPct(20);
  $t->setDstImgBorder(10,"#dddddd");
  $text = "中文";
  $str = mb_convert_encoding($text, "UTF-8", "gb2312");
  $t->setMaskWord($str);
  $t->setMaskWord("test");
  
  // 指定固定宽高
  $t->createImg(50);
  ?>
  </strlen>

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