圖片處理函數(shù)功能：縮放、剪切、相框、水印、銳化、旋轉(zhuǎn)、翻轉(zhuǎn)、透明度、反色，處理并保存歷史記錄的思路：當(dāng)有圖片有改動時自動生成一張新圖片，命 名方式可以考慮在原圖片的基礎(chǔ)上加上步驟，例如：圖片名稱+__第幾步。 在一些需要圖片高級處理功能的Web應(yīng)用中，可以參考這個類。

<?php
/*
圖片處理函數(shù)功能：縮放、剪切、相框、水印、銳化、旋轉(zhuǎn)、翻轉(zhuǎn)、透明度、反色
處理并保存歷史記錄的思路：當(dāng)有圖片有改動時自動生成一張新圖片，命名方式可以考慮在原圖片的基礎(chǔ)上加上步驟，例如：圖片名稱+__第幾步
*/
class picture
{
    var $PICTURE_URL;//要處理的圖片
    var $DEST_URL="temp__01.jpg";//生成目標(biāo)圖片位置
    var $PICTURE_CREATE;//要創(chuàng)建的圖片
    var $TURE_COLOR;//新建一個真彩圖象
 
    var $PICTURE_WIDTH;//原圖片寬度
    var $PICTURE_HEIGHT;//原圖片高度
 
/*
水印的類型，默認(rèn)的為水印文字
*/
    var $MARK_TYPE=1;
    var $WORD;//經(jīng)過UTF-8后的文字
    var $WORD_X;//文字橫坐標(biāo)
    var $WORD_Y;//文字縱坐標(biāo)
    var $FONT_TYPE;//字體類型
    var $FONT_SIZE="12";//字體大小
    var $FONT_WORD;//文字
    var $ANGLE=0;//文字的角度，默認(rèn)為0
    var $FONT_COLOR="#000000";//文字顏色
    var $FONT_PATH="font/simkai.ttf";//字體庫，默認(rèn)為宋體
    var $FORCE_URL;//水印圖片
    var $FORCE_X=0;//水印橫坐標(biāo)
    var $FORCE_Y=0;//水印縱坐標(biāo)
    var $FORCE_START_X=0;//切起水印的圖片橫坐標(biāo)
    var $FORCE_START_Y=0;//切起水印的圖片縱坐標(biāo)
 
    var $PICTURE_TYPE;//圖片類型
    var $PICTURE_MIME;//輸出的頭部
 
/*
縮放比例為1的話就按縮放高度和寬度縮放
*/
    var $ZOOM=1;//縮放類型
    var $ZOOM_MULTIPLE;//縮放比例
    var $ZOOM_WIDTH;//縮放寬度
    var $ZOOM_HEIGHT;//縮放高度
 
/*
裁切，按比例和固定長度、寬度
*/
    var $CUT_TYPE=1;//裁切類型
    var $CUT_X=0;//裁切的橫坐標(biāo)
    var $CUT_Y=0;//裁切的縱坐標(biāo)
    var $CUT_;//裁切的寬度
    var $CUT_HEIGHT=100;//裁切的高度
 
/*
銳化
*/
    var $SHARP="7.0";//銳化程度
 
/*
透明度處理
*/
    var $ALPHA='100';//透明度在0-127之間
    var $ALPHA_X="90";
    var $ALPHA_Y="50";
 
/*
任意角度旋轉(zhuǎn)
*/
    var $CIRCUMROTATE="90.0";//注意，必須為浮點數(shù)
 
/*
出錯信息
*/
    var $ERROR=array(
        'unalviable'=>'沒有找到相關(guān)圖片!'
    );
 
/*
構(gòu)造函數(shù)：函數(shù)初始化
*/
    function __construct($PICTURE_URL)
    {
        $this->get_info($PICTURE_URL);
    }
 
    function get_info($PICTURE_URL)
    {
        /*
        處理原圖片的信息,先檢測圖片是否存在,不存在則給出相應(yīng)的信息
        */
        @$SIZE=getimagesize($PICTURE_URL);
        if(!$SIZE)
        {
            exit($this->ERROR['unalviable']);
        }
 
        //得到原圖片的信息類型、寬度、高度
        $this->PICTURE_MIME=$SIZE['mime'];
        $this->PICTURE_;
        $this->PICTURE_HEIGHT=$SIZE[1];
 
        //創(chuàng)建圖片
        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;
        }  
 
        /*
        文字顏色轉(zhuǎn)換16進(jìn)制轉(zhuǎn)換成10進(jìn)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
 
    /*
    將16進(jìn)制的顏色轉(zhuǎn)換成10進(jìn)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]);
        }
    }
 
    //縮放類型
    function zoom_type($ZOOM_TYPE)
    {
        $this->ZOOM=$ZOOM_TYPE;
    }
 
    //對圖片進(jìn)行縮放,如果不指定高度和寬度就進(jìn)行縮放
    function zoom()
    {
        //縮放的大小
        if($this->ZOOM==0)
        {
            $this->ZOOM_;gt;PICTURE_WIDTH * $this->ZOOM_MULTIPLE;
            $this->ZOOM_HEIGHT=$this->PICTURE_HEIGHT * $this->ZOOM_MULTIPLE;
        }
        //新建一個真彩圖象
        $this->TRUE_COLOR=imagecreatetruecolor($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
    //裁切圖片,按坐標(biāo)或自動
    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
    /*
    在圖片上放文字或圖片
    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 字體的文本的范圍
        */
        $TEMP = imagettfbbox($this->FONT_SIZE,0,$this->FONT_PATH,$this->WORD);
        $WORD_LENGTH=strlen($this->WORD);
        $WORD_WIDTH =$TEMP[2] - $TEMP[6];
        $WORD_HEIGHT =$TEMP[3] - $TEMP[7];
        /*
        文字水印的默認(rèn)位置為右下角
        */
        if($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);
    }
 
    /*
    水印圖片
    */
function _mark_picture()
{
    /*
    獲取水印圖片的信息
    */
    @$SIZE=getimagesize($this->FORCE_URL);
    if(!$SIZE)
    {
        exit($this->ERROR['unalviable']);
    }
    $FORCE_PICTURE_;
    $FORCE_PICTURE_HEIGHT=$SIZE[1];
    //創(chuàng)建水印圖片
    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;
    }
/*
    判斷水印圖片的大小，并生成目標(biāo)圖片的大小，如果水印比圖片大，則生成圖片大小為水印圖片的大小。否則生成的圖片大小為原圖片大小。
*/
    $this->NEW_PICTURE=$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;
    }
    /*
    創(chuàng)建一個畫布
    */
    $NEW_PICTURE_CREATE=imagecreatetruecolor($CREATE_WIDTH,$CREATE_HEIGHT);
    $WHITE=imagecolorallocate($NEW_PICTURE_CREATE,255,255,255);
    /*
    將背景圖拷貝到畫布中
    */
    imagecopy($NEW_PICTURE_CREATE, $this->PICTURE_CREATE, 0, 0, 0, 0,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
 
    /*
    將目標(biāo)圖片拷貝到背景圖片上
    */
    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;
        }
    }
}
 
/*
圖片旋轉(zhuǎn):
沿y軸旋轉(zhuǎn)
*/
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軸旋轉(zhuǎn)
*/
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);
    }
}
 
/*
任意角度旋轉(zhuǎn)
*/
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);
}
/*
圖片銳化
*/
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);
        }
    }
}
 
/*
   將圖片反色處理??
*/
function return_color()
{
    /*
    創(chuàng)建一個畫布
    */
    $NEW_PICTURE_CREATE=imagecreate($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
    $WHITE=imagecolorallocate($NEW_PICTURE_CREATE,255,255,255);
    /*
    將背景圖拷貝到畫布中
    */
    imagecopy($NEW_PICTURE_CREATE, $this->PICTURE_CREATE, 0, 0, 0, 0,$this->PICTURE_WIDTH,$this->PICTURE_HEIGHT);
    $this->TRUE_COLOR=$NEW_PICTURE_CREATE;
}
 
/*
生成目標(biāo)圖片并顯示
*/
function show()
{
    // 判斷瀏覽器,若是IE就不發(fā)送頭
    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);
}
 
/*
生成目標(biāo)圖片并保存
*/
function save_picture()
{
    // 以 JPEG 格式將圖像輸出到瀏覽器或文件
    $OUT=$this->PICTURE_TYPE;
    if(function_exists($OUT))
    {
        // 判斷瀏覽器,若是IE就不發(fā)送頭
        if(isset($_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);
        }
    }
}
/*
析構(gòu)函數(shù)：釋放圖片
*/
function __destruct()
{
/*釋放圖片*/
    imagedestroy($this->TRUE_COLOR);
    imagedestroy($this->PICTURE_CREATE);
}
#end of class
}
?>

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