class.thumbhandler.php

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     * @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);
?>