<?php   
/**  
*   Basic image processing, used to complete the image indentation, watermark add   
*   When the watermark image exceeds the size of the target image, the watermark image can be shrunk automatically to fit the target image   
*   The watermark can be set to merge with the background  
*/   

/*  
 Method of use :  
     Automatic cutting :  
     The program will cut the largest square in the middle according to the size of the image, and then shorten it according to the target size   

    $t--->setSrcImg("img/test.jpg");  
    $t->setCutType(1);// this 1 A sentence is OK the   
    $t->setDstImg("tmp/new_test.jpg");  
    $t->createImg(60,60);  

     Manual cutting :  
     The program fetches the graph from the source graph at the specified location   

    $t->setSrcImg("img/test.jpg");  
    $t->setCutType(2);// Indicates manual cutting   
    $t->setSrcCutPosition(100, 100);//  Source graph starting point coordinates   
    $t->setRectangleCut(300, 200);//  Cutting size   
    $t->setDstImg("tmp/new_test.jpg");  
    $t->createImg(300,200);  
*/   
class ThumbHandler   
{   
    var $dst_img;//  The target file    
    var $h_src; //  Image resource handle    
    var $h_dst;//  It handles    
    var $h_mask;//  Handle to the watermark    
    var $img_create_quality = 100;//  Image Generation Quality    
    var $img_display_quality = 80;//  Picture display quality , The default is 75   
    var $img_scale = 0;//  Picture scaling    
    var $src_w = 0;//  The original width    
    var $src_h = 0;//  The original height    
    var $dst_w = 0;//  Total width of the new image    
    var $dst_h = 0;//  Total height in new drawing    
    var $fill_w;//  Padding width    
    var $fill_h;//  Fill figure height    
    var $copy_w;//  Copy width    
    var $copy_h;//  Copy graph height    
    var $src_x = 0;//  The original drawing draws the starting abscissa    
    var $src_y = 0;//  The original drawing draws the starting y-coordinate    
    var $start_x;//  The new figure draws the starting abscissa    
    var $start_y;//  The new graph is drawn at the starting y-coordinate    
    var $mask_word;//  Watermark text    
    var $mask_img;//  The watermark image    
    var $mask_pos_x = 0;//  Watermark abscissa    
    var $mask_pos_y = 0;//  Ordinate of watermark    
    var $mask_offset_x = 5;//  Watermark lateral migration    
    var $mask_offset_y = 5;//  Watermark vertical migration    
    var $font_w;//  Watermark font width    
    var $font_h;//  Watermark font height    
    var $mask_w;//  Watermark is wide    
    var $mask_h;//  The watermark is high    
    var $mask_font_color = "#ffffff";//  Watermark text color    
    var $mask_font = 2;//  Watermark font    
    var $font_size;//  size    
    var $mask_position = 0;//  The watermark position    
    var $mask_img_pct = 50;//  Image merge degree , The higher the value, the lower the merge procedure    
    var $mask_txt_pct = 50;//  Degree of text consolidation , The smaller the value, the lower the merge procedure    
    var $img_border_size = 0;//  Picture border size    
    var $img_border_color;//  Image Border Color    
    var $_flip_x=0;//  Number of horizontal flips    
    var $_flip_y=0;//  Number of vertical flips    

    var $cut_type=0;//  Shear type    

    
    var $img_type;//  The file type    

    //  File type definition , And pointed out the output picture function    
    var $all_type = array(   
        "jpg"  => array("output"=>"imagejpeg"),   
        "gif"  => array("output"=>"imagegif"),   
        "png"  => array("output"=>"imagepng"),   
        "wbmp" => array("output"=>"image2wbmp"),   
        "jpeg" => array("output"=>"imagejpeg"));   

    /**  
     *  The constructor   
     */   
    function ThumbHandler()   
    {   
        $this->mask_font_color = "#ffffff";   
        $this->font = 2;   
        $this->font_size = 12;   
    }   

    /**  
     *  Gets the width of the image   
     */   
    function getImgWidth($src)   
    {   
        return imagesx($src);   
    }   

    /**  
     *  Get the height of the picture   
     */   
    function getImgHeight($src)   
    {   
        return imagesy($src);   
    }   

    /**  
     *  Set the image generation path   
     *  
     * @param    string    $src_img    Image Generation Path   
     */   
    function setSrcImg($src_img, $img_type=null)   
    {   
        if(!file_exists($src_img))   
        {   
            die(" Image doesn't exist ");   
        }   

        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 Function requirements php version >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(" Image source is empty ");   
        }   
        $this->h_src = @ImageCreateFromString($src);   
        $this->src_w = $this->getImgWidth($this->h_src);   
        $this->src_h = $this->getImgHeight($this->h_src);   
    }   

    /**  
     *  Set the image generation path   
     *  
     * @param    string    $dst_img    Image Generation Path   
     */   
    function setDstImg($dst_img)   
    {   
        $arr  = explode('/',$dst_img);   
        $last = array_pop($arr);   
        $path = implode('/',$arr);   
        $this->_mkdirs($path);   
        $this->dst_img = $dst_img;   
    }   

    /**  
     *  Sets the display quality of the image   
     *  
     * @param    string      $n     The quality of   
     */   
    function setImgDisplayQuality($n)   
    {   
        $this->img_display_quality = (int)$n;   
    }   

    /**  
     *  Sets the generated quality of the image   
     *  
     * @param    string      $n     The quality of   
     */   
    function setImgCreateQuality($n)   
    {   
        $this->img_create_quality = (int)$n;   
    }   

    /**  
     *  Set Text Watermark   
     *  
     * @param    string     $word     Watermark text   
     * @param    integer    $font     Watermark font   
     * @param    string     $color    Watermark font color   
     */   
    function setMaskWord($word)   
    {   
        $this->mask_word .= $word;   
    }   

    /**  
     *  Set the font color   
     *  
     * @param    string     $color     The font color   
     */   
    function setMaskFontColor($color="#ffffff")   
    {   
        $this->mask_font_color = $color;   
    }   

    /**  
     *  Set Watermark Font   
     *  
     * @param    string|integer    $font     The font   
     */   
    function setMaskFont($font=2)   
    {   
        if(!is_numeric($font) && !file_exists($font))   
        {   
            die(" Font file does not exist ");   
        }   
        $this->font = $font;   
    }   

    /**  
     *  Sets the font size of text , Only the truetype Font effective   
     */   
    function setMaskFontSize($size = "12")   
    {   
        $this->font_size = $size;   
    }   

    /**  
     *  Set Image Watermark   
     *  
     * @param    string    $img      Watermark image source   
     */   
    function setMaskImg($img)   
    {   
        $this->mask_img = $img;   
    }   

    /**  
     *  Set the watermark to horizontal offset   
     *  
     * @param    integer     $x     Lateral offset   
     */   
    function setMaskOffsetX($x)   
    {   
        $this->mask_offset_x = (int)$x;   
    }   

    /**  
     *  Set the watermark vertical offset   
     *  
     * @param    integer     $y     Longitudinal offset   
     */   
    function setMaskOffsetY($y)   
    {   
        $this->mask_offset_y = (int)$y;   
    }   

    /**  
     *  Specify watermark position   
     *  
     * @param    integer     $position     location ,1: Upper left ,2: The lower left ,3: The upper right ,0/4: The lower right   
     */   
    function setMaskPosition($position=0)   
    {   
        $this->mask_position = (int)$position;   
    }   

    /**  
     *  Sets the degree of image merging   
     *  
     * @param    integer     $n     Degree of consolidation   
     */   
    function setMaskImgPct($n)   
    {   
        $this->mask_img_pct = (int)$n;   
    }   

    /**  
     *  Sets the level of text merge   
     *  
     * @param    integer     $n     Degree of consolidation   
     */   
    function setMaskTxtPct($n)   
    {   
        $this->mask_txt_pct = (int)$n;   
    }   

    /**  
     *  Sets the thumbnail border   
     *  
     * @param    ( type )     ( Parameter names )    ( describe )  
     */   
    function setDstImgBorder($size=1, $color="#000000")   
    {   
        $this->img_border_size  = (int)$size;   
        $this->img_border_color = $color;   
    }   

    /**  
     *  Flip horizontal   
     */   
    function flipH()   
    {   
        $this->_flip_x++;   
    }   

    /**  
     *  Flip vertical   
     */   
    function flipV()   
    {   
        $this->_flip_y++;   
    }   

    /**  
     *  Set clipping type   
     *  
     * @param    ( type )     ( Parameter names )    ( describe )  
     */   
    function setCutType($type)   
    {   
        $this->cut_type = (int)$type;   
    }   

    /**  
     *  Set image clipping   
     *  
     * @param    integer     $width     The rectangle shear   
     */   
    function setRectangleCut($width, $height)   
    {   
        $this->fill_w = (int)$width;   
        $this->fill_h = (int)$height;   
    }   

    /**  
     *  Sets the starting shear coordinate point of the source graph   
     *  
     * @param    ( type )     ( Parameter names )    ( describe )  
     */   
    function setSrcCutPosition($x, $y)   
    {   
        $this->src_x  = (int)$x;   
        $this->src_y  = (int)$y;   
    }   

    /**  
     *  Create a picture , The main function   
     * @param    integer    $a      When the lack of the first 2 Parameter, this parameter is used as a percentage,   
     *                              Otherwise as the width value   
     * @param    integer    $b      The height of the image after scaling   
     */   
    function createImg($a, $b=null)   
    {   
        $num = func_num_args();   
        if(1 == $num)   
        {   
            $r = (int)$a;   
            if($r < 1)   
            {   
                die(" The picture zooming ratio should not be less than 1");   
            }   
            $this->img_scale = $r;   
            $this->_setNewImgSize($r);   
        }   

        if(2 == $num)   
        {   
            $w = (int)$a;   
            $h = (int)$b;   
            if(0 == $w)   
            {   
                die(" The target width cannot be 0");   
            }   
            if(0 == $h)   
            {   
                die(" The target height cannot be 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();   

        //  The release of    
        if(imagedestroy($this->h_src) && imagedestroy($this->h_dst))   
        {   
            Return true;   
        }   
        else   
        {   
            Return false;   
        }   
    }   

    /**  
     *  To generate the watermark , Two methods of generating watermark text and watermark image are called   
     */   
    function _createMask()   
    {   
        if($this->mask_word)   
        {   
            //  Get font information    
            $this->_setFontInfo();   

            if($this->_isFull())   
            {   
                die(" Watermark text is too large ");   
            }   
            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);//  Fill background color    
                $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();// When loading, get the width and height    

            if($this->_isFull())   
            {   
                //  The watermark is generated on the original image and then copied    
                $this->_createMaskImg($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);//  Fill background color    
                $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   
            {   
                //  Create a new diagram and copy it    
                $this->h_dst = imagecreatetruecolor($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);//  Fill background color    
                $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);//  Fill background color    
            $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);   
        }   
    }   

    /**  
     *  Picture frame   
     */   
    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);//  Fill background color    
        }   
    }   

    /**  
     *  Generate watermark text   
     */   
    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);   
        }   
    }   

    /**  
     *  Generated watermark   
     */   
    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);   
    }   

    /**  
     *  Loading watermark   
     */   
    function _loadMaskImg()   
    {   
        $mask_type = $this->_getImgType($this->mask_img);   
        $this->_checkValid($mask_type);   

        // file_get_contents Function requirements php version >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(" The watermark image is empty ");   
        }   
        $this->h_mask = ImageCreateFromString($src);   
        $this->mask_w = $this->getImgWidth($this->h_mask);   
        $this->mask_h = $this->getImgHeight($this->h_mask);   
    }   

    /**  
     *  Image output   
     */   
    function _output()   
    {   
        $img_type  = $this->img_type;   
        $func_name = $this->all_type[$img_type]['output'];   
        if(function_exists($func_name))   
        {   
            //  Judge browser , if IE We don't send headers    
            if(isset($_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;   
        }   
    }   

    /**  
     *  Analysis of color   
     *  
     * @param    string     $color    106 Hexadecimal color   
     */   
    function _parseColor($color)   
    {   
        $arr = array();   
        for($ii=1; $ii<strlen function="" return="" this-="">_isFull())   
        {   
            switch($this->mask_position)   
            {   
                case 1:   
                    //  Upper left    
                    $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:   
                    //  The lower left    
                    $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:   
                    //  The upper right    
                    $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:   
                    //  The lower right    
                    $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:   
                    //  The default is to put the watermark in the bottom right , Offset specified pixel    
                    $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:   
                    //  Upper left    
                    $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:   
                    //  The lower left    
                    $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:   
                    //  The upper right    
                    $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:   
                    //  The lower right    
                    $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:   
                    //  The default is to put the watermark in the bottom right , Offset specified pixel    
                    $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;   
            }   
        }   
    }   

    /**  
     *  Set font information   
     */   
    function _setFontInfo()   
    {   
        if(is_numeric($this->font))   
        {   
            $this->font_w  = imagefontwidth($this->font);   
            $this->font_h  = imagefontheight($this->font);   

            //  Calculate the width and height of the watermark font    
            $word_length   = strlen($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]);   
        }   
    }   

    /**  
     *  Sets the new diagram size   
     *  
     * @param    integer     $img_w    The target width   
     * @param    integer     $img_h    Target height   
     */   
    function _setNewImgSize($img_w, $img_h=null)   
    {   
        $num = func_num_args();   
        if(1 == $num)   
        {   
            $this->img_scale = $img_w;//  Width as scale    
            $this->fill_w = round($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;   

            //  Source file starting coordinates    
            $this->src_x  = 0;   
            $this->src_y  = 0;   
            $this->copy_w = $this->src_w;   
            $this->copy_h = $this->src_h;   

            //  The target size    
            $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(" The image border is too large. It exceeds the width of the image ");   
            }