<?php
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;

	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);
	}

	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;
		$this->waterpng = $trueMarkimg;


		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;
		}
	}

	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);
		}
	}

	function watermark($preview = 0)
	{
		if($this->watermarkminwidth && $this->attachinfo[0] <= $this->watermarkminwidth && $this->watermarkminheight && $this->attachinfo[1] <= $this->watermarkminheight)
		{
			return ;
		}
		$this->watermark_gd($preview);
	}

	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;
			}
		}
	}

	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)
			{
				$temp_png = $this->waterpng ? $this->waterpng : SSROOT.'/admin/'.WATERMARK_PNG;
				$watermark_file = $this->watermarktype == 1 ? $temp_png : SSROOT.'/admin/images/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);
			}
		}
	}
}
?>