本文實例講述了php實現(xiàn)的通用圖片處理類。分享給大家供大家參考。具體如下：
該圖片處理函數(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。
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<?phpclass picture{ var $PICTURE_URL;//要處理的圖片 var $DEST_URL="temp__01.jpg";//生成目標圖片位置 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 var $WORD_Y;//文字縱坐標 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，默認為0 var $FONT_COLOR="#000000";//文字顏色 var $FONT_PATH="font/simkai.ttf";//字體庫，默認為宋體 var $FORCE_URL;//水印圖片 var $FORCE_X=0;//水印橫坐標 var $FORCE_Y=0;//水印縱坐標 var $FORCE_START_X=0;//切起水印的圖片橫坐標 var $FORCE_START_Y=0;//切起水印的圖片縱坐標 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 var $CUT_Y=0;//裁切的縱坐標 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"; $this->PICTURE_EXT="png"; break; } /* 文字顏色轉(zhuǎn)換16進制轉(zhuǎn)換成10進制 */ preg_match_all("/([0-f]){2,2}/i",$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進制的顏色轉(zhuǎn)換成10進制的（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; } //對圖片進行縮放,如果不指定高度和寬度就進行縮放 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 markfunction 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}?> |
希望本文所述對大家的php程序設(shè)計有所幫助。
