简明现代魔法 -> PHP服务器脚本 -> 一个功能全面的PHP图片处理类

一个功能全面的PHP图片处理类

2010-06-11

图片处理函数功能:缩放、剪切、相框、水印、锐化、旋转、翻转、透明度、反色,处理并保存历史记录的思路:当有图片有改动时自动生成一张新图片,命名方式可以考虑在原图片的基础上加上步骤,例如:图片名称+__第几步。

在一些需要图片高级处理功能的Web应用中,可以参考这个类。

<?php
/*
图片处理函数功能:缩放、剪切、相框、水印、锐化、旋转、翻转、透明度、反色
处理并保存历史记录的思路:当有图片有改动时自动生成一张新图片,命名方式可以考虑在原图片的基础上加上步骤,例如:图片名称+__第几步
*/
class picture
{
	var $PICTURE_URL;//要处理的图片
	var $DEST_URL="temp__01.jpg";//生成目标图片位置
	var $PICTURE_CREATE;//要创建的图片
	var $TURE_COLOR;//新建一个真彩图象

	var $PICTURE_WIDTH;//原图片宽度
	var $PICTURE_HEIGHT;//原图片高度

/*
水印的类型,默认的为水印文字
*/
	var $MARK_TYPE=1;
	var $WORD;//经过UTF-8后的文字
	var $WORD_X;//文字横坐标
	var $WORD_Y;//文字纵坐标
	var $FONT_TYPE;//字体类型
	var $FONT_SIZE="12";//字体大小
	var $FONT_WORD;//文字
	var $ANGLE=0;//文字的角度,默认为0
	var $FONT_COLOR="#000000";//文字颜色
	var $FONT_PATH="font/simkai.ttf";//字体库,默认为宋体
	var $FORCE_URL;//水印图片
	var $FORCE_X=0;//水印横坐标
	var $FORCE_Y=0;//水印纵坐标
	var $FORCE_START_X=0;//切起水印的图片横坐标
	var $FORCE_START_Y=0;//切起水印的图片纵坐标

	var $PICTURE_TYPE;//图片类型
	var $PICTURE_MIME;//输出的头部

/*
缩放比例为1的话就按缩放高度和宽度缩放
*/
	var $ZOOM=1;//缩放类型
	var $ZOOM_MULTIPLE;//缩放比例
	var $ZOOM_WIDTH;//缩放宽度
	var $ZOOM_HEIGHT;//缩放高度

/*
裁切,按比例和固定长度、宽度
*/
	var $CUT_TYPE=1;//裁切类型
	var $CUT_X=0;//裁切的横坐标
	var $CUT_Y=0;//裁切的纵坐标
	var $CUT_;//裁切的宽度
	var $CUT_HEIGHT=100;//裁切的高度

/*
锐化
*/
	var $SHARP="7.0";//锐化程度

/*
透明度处理
*/
	var $ALPHA='100';//透明度在0-127之间
	var $ALPHA_X="90";
	var $ALPHA_Y="50";

/*
任意角度旋转
*/
	var $CIRCUMROTATE="90.0";//注意,必须为浮点数

/*
出错信息
*/
	var $ERROR=array(
		'unalviable'=>'没有找到相关图片!'
	);

/*
构造函数:函数初始化
*/
	function __construct($PICTURE_URL)
	{
		$this->get_info($PICTURE_URL);
	}
	
	function get_info($PICTURE_URL)
	{
		/*
		处理原图片的信息,先检测图片是否存在,不存在则给出相应的信息
		*/
		@$SIZE=getimagesize($PICTURE_URL);
		if(!$SIZE)
		{
   			exit($this->ERROR['unalviable']);
		}

		//得到原图片的信息类型、宽度、高度
		$this->PICTURE_MIME=$SIZE['mime'];
		$this->PICTURE_;
		$this->PICTURE_HEIGHT=$SIZE[1];

		//创建图片
		switch($SIZE[2])
		{
   			case 1:
    			$this->PICTURE_CREATE=imagecreatefromgif($PICTURE_URL);
    			$this->PICTURE_TYPE="imagejpeg";
    			$this->PICTURE_EXT="jpg";
    			break;
   			case 2:
    			$this->PICTURE_CREATE=imagecreatefromjpeg($PICTURE_URL);
    			$this->PICTURE_TYPE="imagegif";
    			$this->PICTURE_EXT="gif";
    			break;
   			case 3:
    			$this->PICTURE_CREATE=imagecreatefrompng($PICTURE_URL);
    			$this->PICTURE_TYPE="imagepng";
    			$this->PICTURE_EXT="png";
    			break;
		}	

		/*
		文字颜色转换16进制转换成10进制
		*/
		preg_match_all("/([0-f]){2,2}/i",$this->FONT_COLOR,$MATCHES);
		if(count($MATCHES)==3)
		{
   			$this->RED=hexdec($MATCHES[0][0]);
   			$this->GREEN=hexdec($MATCHES[0][1]);
   			$this->BLUE=hexdec($MATCHES[0][2]);
		}
	}

	#end of __construct

	/*
	将16进制的颜色转换成10进制的(R,G,B)
	*/
	function hex2dec()
	{
		preg_match_all("/([0-f]){2,2}/i",$this->FONT_COLOR,$MATCHES);
		if(count($MATCHES)==3)
		{
   			$this->RED=hexdec($MATCHES[0][0]);
   			$this->GREEN=hexdec($MATCHES[0][1]);
   			$this->BLUE=hexdec($MATCHES[0][2]);
		}
	}

	//缩放类型
	function zoom_type($ZOOM_TYPE)
	{
		$this->ZOOM=$ZOOM_TYPE;
	}

	//对图片进行缩放,如果不指定高度和宽度就进行缩放
	function zoom()
	{
		//缩放的大小
		if($this->ZOOM==0)
		{
   			$this->ZOOM_;gt;PICTURE_WIDTH * $this->ZOOM_MULTIPLE;
   			$this->ZOOM_HEIGHT=$this->PICTURE_HEIGHT * $this->ZOOM_MULTIPLE;
		}
		//新建一个真彩图象
		$this->TRUE_COLOR=imagecreatetruecolor($this->ZOOM_WIDTH,$this->ZOOM_HEIGHT);
		$WHITE=imagecolorallocate($this->TRUE_COLOR,255,255,255);
		imagefilledrectangle($this->TRUE_COLOR,0,0,$this->ZOOM_WIDTH,$this->ZOOM_HEIGHT,$WHITE);
		imagecopyresized($this->TRUE_COLOR,$this->PICTURE_CREATE,0,0,0,0,$this->ZOOM_WIDTH,$this->ZOOM_HEIGHT,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
	}

	#end of zoom
	//裁切图片,按坐标或自动
	function cut()
	{
		$this->TRUE_COLOR=imagecreatetruecolor($this->CUT_WIDTH,$this->CUT_WIDTH);
		imagecopy($this->TRUE_COLOR,$this->PICTURE_CREATE, 0, 0, $this->CUT_X, $this->CUT_Y,$this->CUT_WIDTH,$this->CUT_HEIGHT);
	}

	#end of cut
	/*
	在图片上放文字或图片
	水印文字
	*/
	function _mark_text()
	{
		$this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
		$this->WORD=mb_convert_encoding($this->FONT_WORD,'utf-8','gb2312');
		/*
		取得使用 TrueType 字体的文本的范围
		*/
		$TEMP = imagettfbbox($this->FONT_SIZE,0,$this->FONT_PATH,$this->WORD);
		$WORD_LENGTH=strlen($this->WORD);
		$WORD_WIDTH =$TEMP[2] - $TEMP[6];
		$WORD_HEIGHT =$TEMP[3] - $TEMP[7];
		/*
		文字水印的默认位置为右下角
		*/
		if($this->WORD_X=="")
		{
   			$this->WORD_X=$this->PICTURE_WIDTH-$WORD_WIDTH;
		}
		if($this->WORD_Y=="")
		{
   			$this->WORD_Y=$this->PICTURE_HEIGHT-$WORD_HEIGHT;
		}
		imagesettile($this->TRUE_COLOR,$this->PICTURE_CREATE);
		imagefilledrectangle($this->TRUE_COLOR,0,0,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT,IMG_COLOR_TILED);
		$TEXT2=imagecolorallocate($this->TRUE_COLOR,$this->RED,$this->GREEN,$this->Blue);
		imagettftext($this->TRUE_COLOR,$this->FONT_SIZE,$this->ANGLE,$this->WORD_X,$this->WORD_Y,$TEXT2,$this->FONT_PATH,$this->WORD);
	}

	/*
	水印图片
	*/
function _mark_picture()
{
	/*
	获取水印图片的信息
	*/
	@$SIZE=getimagesize($this->FORCE_URL);
	if(!$SIZE)
	{
   		exit($this->ERROR['unalviable']);
	}
	$FORCE_PICTURE_;
	$FORCE_PICTURE_HEIGHT=$SIZE[1];
	//创建水印图片
	switch($SIZE[2])
	{
  		case 1:
    		$FORCE_PICTURE_CREATE=imagecreatefromgif($this->FORCE_URL);
    		$FORCE_PICTURE_TYPE="gif";
    		break;
   		case 2:
    		$FORCE_PICTURE_CREATE=imagecreatefromjpeg($this->FORCE_URL);
    		$FORCE_PICTURE_TYPE="jpg";
    		break;
   		case 3:
    		$FORCE_PICTURE_CREATE=imagecreatefrompng($this->FORCE_URL);
    		$FORCE_PICTURE_TYPE="png";
    		break;
	}
/*
    判断水印图片的大小,并生成目标图片的大小,如果水印比图片大,则生成图片大小为水印图片的大小。否则生成的图片大小为原图片大小。
*/
	$this->NEW_PICTURE=$this->PICTURE_CREATE;
	if($FORCE_PICTURE_WIDTH>$this->PICTURE_WIDTH)
	{
   		$CREATE_;gt;FORCE_START_X;
	}
	else
	{
   		$CREATE_;gt;PICTURE_WIDTH;
	}
	
	if($FORCE_PICTURE_HEIGHT>$this->PICTURE_HEIGHT)
	{
   		$CREATE_HEIGHT=$FORCE_PICTURE_HEIGHT-$this->FORCE_START_Y;
	}
	else
	{
   		$CREATE_HEIGHT=$this->PICTURE_HEIGHT;
	}
	/*
    创建一个画布
	*/
	$NEW_PICTURE_CREATE=imagecreatetruecolor($CREATE_WIDTH,$CREATE_HEIGHT);
	$WHITE=imagecolorallocate($NEW_PICTURE_CREATE,255,255,255);
	/*
    将背景图拷贝到画布中
	*/
	imagecopy($NEW_PICTURE_CREATE, $this->PICTURE_CREATE, 0, 0, 0, 0,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);

	/*
    将目标图片拷贝到背景图片上
	*/
	imagecopy($NEW_PICTURE_CREATE, $FORCE_PICTURE_CREATE, $this->FORCE_X, $this->FORCE_Y, $this->FORCE_START_X, $this->FORCE_START_Y,$FORCE_PICTURE_WIDTH,$FORCE_PICTURE_HEIGHT);
	$this->TRUE_COLOR=$NEW_PICTURE_CREATE;
}
#end of mark

function alpha_()
{
	$this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
	$rgb="#CDCDCD";
	$tran_color="#000000";
	for($j=0;$j<=$this->PICTURE_HEIGHT-1;$j++)
	{
   		for ($i=0;$i<=$this->PICTURE_WIDTH-1;$i++)
   		{
    		$rgb = imagecolorat($this->PICTURE_CREATE,$i,$j);
    		$r = ($rgb >> 16) & 0xFF;
    		$g = ($rgb >> 8) & 0xFF;
    		$b = $rgb & 0xFF;
    		$now_color=imagecolorallocate($this->PICTURE_CREATE,$r,$g,$b);
   		 	if ($now_color==$tran_color)
    		{
     			continue;
    		}
    		else
    		{
     			$color=imagecolorallocatealpha($this->PICTURE_CREATE,$r,$g,$b,$ALPHA);
     			imagesetpixel($this->PICTURE_CREATE,$ALPHA_X+$i,$ALPHA_Y+$j,$color);
    		}
    		$this->TRUE_COLOR=$this->PICTURE_CREATE;
   		}
	}
}

/*
图片旋转:
沿y轴旋转
*/
function turn_y()
{
	$this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
	for ($x = 0; $x < $this->PICTURE_WIDTH; $x++)
	{
   		imagecopy($this->TRUE_COLOR, $this->PICTURE_CREATE, $this->PICTURE_WIDTH - $x - 1, 0, $x, 0, 1, $this->PICTURE_HEIGHT);
	}
}
/*
沿X轴旋转
*/
function turn_x()
{
	$this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
	for ($y = 0; $y < $this->PICTURE_HEIGHT; $y++)
	{
   		imagecopy($this->TRUE_COLOR, $this->PICTURE_CREATE, 0, $this->PICTURE_HEIGHT - $y - 1, 0, $y, $this->PICTURE_WIDTH, 1);
	}
}


/*
任意角度旋转
*/
function turn()
{
	$this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
	imageCopyResized($this->TRUE_COLOR,$this->PICTURE_CREATE,0,0,0,0,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
	$WHITE=imagecolorallocate($this->TRUE_COLOR,255,255,255);
	$this->TRUE_COLOR=imagerotate ($this->TRUE_COLOR, $this->CIRCUMROTATE, $WHITE);
}
/*
图片锐化
*/
function sharp()
{
	$this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
	$cnt=0;
	for ($x=0; $x<$this->PICTURE_WIDTH; $x++)
	{
   		for ($y=0; $y<$this->PICTURE_HEIGHT; $y++)
   		{
    		$src_clr1 = imagecolorsforindex($this->TRUE_COLOR, imagecolorat($this->PICTURE_CREATE, $x-1, $y-1));
    		$src_clr2 = imagecolorsforindex($this->TRUE_COLOR, imagecolorat($this->PICTURE_CREATE, $x, $y));
    		$r = intval($src_clr2["red"]+$this->SHARP*($src_clr2["red"]-$src_clr1["red"]));
    		$g = intval($src_clr2["green"]+$this->SHARP*($src_clr2["green"]-$src_clr1["green"]));
    		$b = intval($src_clr2["blue"]+$this->SHARP*($src_clr2["blue"]-$src_clr1["blue"]));
    		$r = min(255, max($r, 0));
    		$g = min(255, max($g, 0));
    		$b = min(255, max($b, 0));
    		if (($DST_CLR=imagecolorexact($this->PICTURE_CREATE, $r, $g, $b))==-1)
    			$DST_CLR = imagecolorallocate($this->PICTURE_CREATE, $r, $g, $b);
    			$cnt++;
    		if ($DST_CLR==-1) die("color allocate faile at $x, $y ($cnt).");
    			imagesetpixel($this->TRUE_COLOR, $x, $y, $DST_CLR);
   		}
	}
}

/*
   将图片反色处理??
*/
function return_color()
{
	/*
    创建一个画布
	*/
	$NEW_PICTURE_CREATE=imagecreate($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
	$WHITE=imagecolorallocate($NEW_PICTURE_CREATE,255,255,255);
	/*
    将背景图拷贝到画布中
	*/
	imagecopy($NEW_PICTURE_CREATE, $this->PICTURE_CREATE, 0, 0, 0, 0,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
	$this->TRUE_COLOR=$NEW_PICTURE_CREATE;
}

/*
生成目标图片并显示
*/
function show()
{
	// 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:$this->PICTURE_MIME");
   		}
	}
	$OUT=$this->PICTURE_TYPE;
	$OUT($this->TRUE_COLOR);
}

/*
生成目标图片并保存
*/
function save_picture()
{
	// 以 JPEG 格式将图像输出到浏览器或文件
	$OUT=$this->PICTURE_TYPE;
	if(function_exists($OUT))
	{
   		// 判断浏览器,若是IE就不发送头
   		if(isset($_SERVER['HTTP_USER_AGENT']))
   		{
    		$ua = strtoupper($_SERVER['HTTP_USER_AGENT']);
    		if(!preg_match('/^.*MSIE.*\)$/i',$ua))
    		{
     			header("Content-type:$this->PICTURE_MIME");
    		}
   		}
   		if(!$this->TRUE_COLOR)
		{
    		exit($this->ERROR['unavilable']);
   		}
		else
		{
    		$OUT($this->TRUE_COLOR,$this->DEST_URL);
    		$OUT($this->TRUE_COLOR);
   		}
	}
}
/*
析构函数:释放图片
*/
function __destruct()
{
/*释放图片*/
	imagedestroy($this->TRUE_COLOR);
	imagedestroy($this->PICTURE_CREATE);
}
#end of class
}
?>
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