<?php   if(!defined('DEDEINC')) exit('dedecms');

/**

 * 图像处理类

 *

 * @version        $Id: image.class.php 1 18:10 2010年7月5日Z tianya $

 * @package        DedeCMS.Libraries

 * @copyright      Copyright (c) 2007 - 2010, DesDev, Inc.

 * @license        http://help.dedecms.com/usersguide/license.html

 * @link           http://www.dedecms.com

 */

class image

{

    var $attachinfo;

    var $targetfile;    //图片路径

    var $imagecreatefromfunc;

    var $imagefunc;

    var $attach;

    var $animatedgif;

    var $watermarkquality;

    var $watermarktext;

    var $thumbstatus;

    var $watermarkstatus;

    

    // 析构函数,兼容PHP4

    function image($targetfile, $cfg_thumb, $cfg_watermarktext, $photo_waterpos, $photo_diaphaneity, $photo_wheight, $photo_wwidth, $cfg_watermarktype, $photo_marktrans,$trueMarkimg, $attach = array())

    {

        $this->__construct($targetfile, $cfg_thumb, $cfg_watermarktext, $photo_waterpos, $photo_diaphaneity, $photo_wheight, $photo_wwidth, $cfg_watermarktype, $photo_marktrans,$trueMarkimg, $attach);

    }



    // 析构函数

    function __construct($targetfile, $cfg_thumb, $cfg_watermarktext, $photo_waterpos, $photo_diaphaneity, $photo_wheight, $photo_wwidth, $cfg_watermarktype, $photo_marktrans,$trueMarkimg, $attach = array())

    {

        $this->thumbstatus = $cfg_thumb;

        $this->watermarktext = $cfg_watermarktext;

        $this->watermarkstatus = $photo_waterpos;

        $this->watermarkquality = $photo_marktrans;

        $this->watermarkminwidth = $photo_wwidth;

        $this->watermarkminheight = $photo_wheight;

        $this->watermarktype = $cfg_watermarktype;

        $this->watermarktrans = $photo_diaphaneity;

        $this->animatedgif = 0;

        $this->targetfile = $targetfile;

        $this->attachinfo = @getimagesize($targetfile);

        $this->attach = $attach;





        switch($this->attachinfo['mime'])

        {

            case 'image/jpeg':

                $this->imagecreatefromfunc = function_exists('imagecreatefromjpeg') ? 'imagecreatefromjpeg' : '';

                $this->imagefunc = function_exists('imagejpeg') ? 'imagejpeg' : '';

                break;

            case 'image/gif':

                $this->imagecreatefromfunc = function_exists('imagecreatefromgif') ? 'imagecreatefromgif' : '';

                $this->imagefunc = function_exists('imagegif') ? 'imagegif' : '';

                break;

            case 'image/png':

                $this->imagecreatefromfunc = function_exists('imagecreatefrompng') ? 'imagecreatefrompng' : '';

                $this->imagefunc = function_exists('imagepng') ? 'imagepng' : '';

                break;

        }//为空则匹配类型的函数不存在



        $this->attach['size'] = empty($this->attach['size']) ? @filesize($targetfile) : $this->attach['size'];

        if($this->attachinfo['mime'] == 'image/gif')

        {

            $fp = fopen($targetfile, 'rb');

            $targetfilecontent = fread($fp, $this->attach['size']);

            fclose($fp);

            $this->animatedgif = strpos($targetfilecontent, 'NETSCAPE2.0') === false ? 0 : 1;

        }

    }



    /**

     *  生成缩略图

     *

     * @access    public

     * @param     int  $thumbwidth  图片宽度

     * @param     int  $thumbheight  图片高度

     * @param     int  $preview  是否预览

     * @return    void

     */

    function thumb($thumbwidth, $thumbheight, $preview = 0)

    {

        $this->thumb_gd($thumbwidth, $thumbheight, $preview);



        if($this->thumbstatus == 2 && $this->watermarkstatus)

        {

            $this->image($this->targetfile, $this->attach);

            $this->attach['size'] = filesize($this->targetfile);

        }

    }



    /**

     *  图片水印

     *

     * @access    public

     * @param     int   $preview  是否预览

     * @return    void

     */

    function watermark($preview = 0)

    {

        if($this->watermarkminwidth && $this->attachinfo[0] <= $this->watermarkminwidth && $this->watermarkminheight && $this->attachinfo[1] <= $this->watermarkminheight)

        {

            return ;

        }

        $this->watermark_gd($preview);

    }



    /**

     *  使用gd生成缩略图

     *

     * @access    public

     * @param     int  $thumbwidth  图片宽度

     * @param     int  $thumbheight  图片高度

     * @param     int  $preview  是否预览

     * @return    void

     */

    function thumb_gd($thumbwidth, $thumbheight, $preview = 0)

    {



        if($this->thumbstatus && function_exists('imagecreatetruecolor') && function_exists('imagecopyresampled') && function_exists('imagejpeg'))

        {

            $imagecreatefromfunc = $this->imagecreatefromfunc;

            $imagefunc = $this->thumbstatus == 1 ? 'imagejpeg' : $this->imagefunc;

            list($imagewidth, $imageheight) = $this->attachinfo;

            if(!$this->animatedgif && ($imagewidth >= $thumbwidth || $imageheight >= $thumbheight))

            {

                $attach_photo = $imagecreatefromfunc($this->targetfile);

                $x_ratio = $thumbwidth / $imagewidth;

                $y_ratio = $thumbheight / $imageheight;

                if(($x_ratio * $imageheight) < $thumbheight)

                {

                    $thumb['height'] = ceil($x_ratio * $imageheight);

                    $thumb['width'] = $thumbwidth;

                }

                else

                {

                    $thumb['width'] = ceil($y_ratio * $imagewidth);

                    $thumb['height'] = $thumbheight;

                }

                $targetfile = !$preview ? ($this->thumbstatus == 1 ? $this->targetfile.'.thumb.jpg' : $this->targetfile) : './watermark_tmp.jpg';

                $thumb_photo = imagecreatetruecolor($thumb['width'], $thumb['height']);

                imagecopyresampled($thumb_photo, $attach_photo, 0, 0, 0, 0, $thumb['width'], $thumb['height'], $imagewidth, $imageheight);

                if($this->attachinfo['mime'] == 'image/jpeg')

                {

                    $imagefunc($thumb_photo, $targetfile, 100);

                }

                else

                {

                    $imagefunc($thumb_photo, $targetfile);

                }

                $this->attach['thumb'] = $this->thumbstatus == 1 ? 1 : 0;

            }

        }

    }



    /**

     *  使用gd进行水印

     *

     * @access    public

     * @param     int   $preview  是否预览

     * @return    void

     */

    function watermark_gd($preview = 0)

    {

        if($this->watermarkstatus && function_exists('imagecopy') && function_exists('imagealphablending') && function_exists('imagecopymerge'))

        {

            $imagecreatefunc = $this->imagecreatefromfunc;

            $imagefunc = $this->imagefunc;

            list($imagewidth, $imageheight) = $this->attachinfo;

            if($this->watermarktype < 2)

            {

                $watermark_file = $this->watermarktype == 1 ? DEDEDATA.'/mark/mark.png' : DEDEDATA.'/mark/mark.gif';

                $watermarkinfo = @getimagesize($watermark_file);

                $watermark_logo = $this->watermarktype == 1 ? @imagecreatefrompng($watermark_file) : @imagecreatefromgif($watermark_file);

                if(!$watermark_logo)

                {

                    return ;

                }

                list($logowidth, $logoheight) = $watermarkinfo;

            }

            else

            {

                $box = @imagettfbbox($this->watermarktext['size'], $this->watermarktext['angle'], $this->watermarktext['fontpath'],$this->watermarktext['text']);

                $logowidth = max($box[2], $box[4]) - min($box[0], $box[6]);

                $logoheight = max($box[1], $box[3]) - min($box[5], $box[7]);

                $ax = min($box[0], $box[6]) * -1;

                $ay = min($box[5], $box[7]) * -1;

            }

            $wmwidth = $imagewidth - $logowidth;

            $wmheight = $imageheight - $logoheight;

            if(($this->watermarktype < 2 && is_readable($watermark_file) || $this->watermarktype == 2) && $wmwidth > 10 && $wmheight > 10 && !$this->animatedgif)

            {

                switch($this->watermarkstatus)

                {

                    case 1:



                        $x = +5;

                        $y = +5;

                        break;

                    case 2:

                        $x = ($imagewidth - $logowidth) / 2;

                        $y = +5;

                        break;

                    case 3:

                        $x = $imagewidth - $logowidth - 5;

                        $y = +5;

                        break;

                    case 4:

                        $x = +5;

                        $y = ($imageheight - $logoheight) / 2;

                        break;

                    case 5:

                        $x = ($imagewidth - $logowidth) / 2;

                        $y = ($imageheight - $logoheight) / 2;

                        break;

                    case 6:

                        $x = $imagewidth - $logowidth - 5;

                        $y = ($imageheight - $logoheight) / 2;

                        break;

                    case 7:

                        $x = +5;

                        $y = $imageheight - $logoheight - 5;

                        break;

                    case 8:

                        $x = ($imagewidth - $logowidth) / 2;

                        $y = $imageheight - $logoheight - 5;

                        break;

                    case 9:

                        $x = $imagewidth - $logowidth - 5;

                        $y = $imageheight - $logoheight -5;

                        break;

                }

                $dst_photo = @imagecreatetruecolor($imagewidth, $imageheight);

                $target_photo = $imagecreatefunc($this->targetfile);

                imagecopy($dst_photo, $target_photo, 0, 0, 0, 0, $imagewidth, $imageheight);

                if($this->watermarktype == 1)

                {

                    imagecopy($dst_photo, $watermark_logo, $x, $y, 0, 0, $logowidth, $logoheight);

                }

                elseif($this->watermarktype == 2)

                {

                    if(($this->watermarktext['shadowx'] || $this->watermarktext['shadowy']) && $this->watermarktext['shadowcolor'])

                    {

                        $shadowcolorrgb = explode(',', $this->watermarktext['shadowcolor']);

                        $shadowcolor = imagecolorallocate($dst_photo, $shadowcolorrgb[0], $shadowcolorrgb[1], $shadowcolorrgb[2]);

                        imagettftext($dst_photo, $this->watermarktext['size'], $this->watermarktext['angle'],

                        $x + $ax + $this->watermarktext['shadowx'], $y + $ay + $this->watermarktext['shadowy'], $shadowcolor,

                        $this->watermarktext['fontpath'], $this->watermarktext['text']);

                    }

                    $colorrgb = explode(',', $this->watermarktext['color']);

                    $color = imagecolorallocate($dst_photo, $colorrgb[0], $colorrgb[1], $colorrgb[2]);

                    imagettftext($dst_photo, $this->watermarktext['size'], $this->watermarktext['angle'],

                    $x + $ax, $y + $ay, $color, $this->watermarktext['fontpath'], $this->watermarktext['text']);

                }

                else

                {

                    imagealphablending($watermark_logo, true);

                    imagecopymerge($dst_photo, $watermark_logo, $x, $y, 0, 0, $logowidth, $logoheight, $this->watermarktrans);

                }

                $targetfile = !$preview ? $this->targetfile : './watermark_tmp.jpg';

                if($this->attachinfo['mime'] == 'image/jpeg')

                {

                    $imagefunc($dst_photo, $targetfile, $this->watermarkquality);

                }

                else

                {

                    $imagefunc($dst_photo, $targetfile);

                }

                $this->attach['size'] = filesize($this->targetfile);

            }

        }

    }

}//End Class