The example in this article describes the general image processing class implemented by PHP. Share it with everyone for your reference. The details are as follows:
The image processing function functions: zoom, cut, photo frame, watermark, sharpen, rotate, flip, transparency, invert color, the idea of processing and saving historical records: automatically generate a new image when a picture is changed , the naming method can consider adding steps based on the original picture, for example: picture name __ what step. In some web applications that require advanced image processing functions, you can refer to this class.
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class picture { var $PICTURE_URL;//Picture to be processed var $DEST_URL="temp__01.jpg";//Generate target image location var $PICTURE_CREATE;//Picture to be created var $TURE_COLOR;//Create a new true color image var $PICTURE_WIDTH; //Original picture width var $PICTURE_HEIGHT;//original picture height /* The type of watermark, the default is watermark text */ var $MARK_TYPE=1; var $WORD;//Text after UTF-8 var $WORD_X;//text abscissa var $WORD_Y;//text ordinate var $FONT_TYPE;//Font type var $FONT_SIZE="12";//Font size var $FONT_WORD;//text var $ANGLE=0;//The angle of the text, the default is 0 var $FONT_COLOR="#000000";//Text color var $FONT_PATH="font/simkai.ttf";//Font library, the default is Song Dynasty var $FORCE_URL;//watermark image var $FORCE_X=0; //watermark abscissa var $FORCE_Y=0;//Watermark vertical coordinate var $FORCE_START_X=0;//The abscissa of the picture where the watermark is cut var $FORCE_START_Y=0;//The ordinate of the picture where the watermark is cut var $PICTURE_TYPE;//Picture type var $PICTURE_MIME;//Output header /* If the scaling ratio is 1, scale according to the scaling height and width */ var $ZOOM=1;//Zoom type var $ZOOM_MULTIPLE; //Zoom ratio var $ZOOM_WIDTH; //Zoom width var $ZOOM_HEIGHT;//Zoom height /* Crop, proportional and fixed length and width */ var $CUT_TYPE=1;//Cut type var $CUT_X=0;//abscissa coordinate of cropping var $CUT_Y=0;//The vertical coordinate of cropping var $CUT_;//Cut width var $CUT_HEIGHT=100; //Cutting height /* Sharpening */ var $SHARP="7.0";//sharpening degree /* Transparency processing */ var $ALPHA='100'; //Transparency is between 0-127 var $ALPHA_X="90"; var $ALPHA_Y="50"; /* Rotate at any angle */ var $CIRCUMROTATE="90.0";//Note, it must be a floating point number /* Error message */ var $ERROR=array( 'unalviable'=>'No related pictures found!' ); /* Constructor: Function initialization */ function __construct($PICTURE_URL) { $this->get_info($PICTURE_URL); } function get_info($PICTURE_URL) { /* Process the information of the original image, first check whether the image exists, if not, the corresponding information will be given */ @$SIZE=getimagesize($PICTURE_URL); if(!$SIZE) { exit($this->ERROR['unalviable']); } //Get the information type, width, and height of the original image $this->PICTURE_MIME=$SIZE['mime']; $this->PICTURE_; $this->PICTURE_HEIGHT=$SIZE[1]; //Create pictures 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"; $this->PICTURE_EXT="png"; break; } /* Convert text color from hexadecimal to decimal */ preg_match_all("/([0-f]){2,2}/i",$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 /* Convert hexadecimal color to decimal (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]); } } //Zoom type function zoom_type($ZOOM_TYPE) { $this->ZOOM=$ZOOM_TYPE; } //Scale the image, if the height and width are not specified, it will be scaled function zoom() { //Zoom size if($this->ZOOM==0) { $this->ZOOM_;gt;PICTURE_WIDTH * $this->ZOOM_MULTIPLE; $this->ZOOM_HEIGHT=$this->PICTURE_HEIGHT * $this->ZOOM_MULTIPLE; } //Create a new true color image $this->TRUE_COLOR=imagecreatetruecolor($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 //Crop the picture, according to coordinates or automatically 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 /* Put text or pictures on the picture Watermark text */ function _mark_text() { $this->TRUE_COLOR=imagecreatetruecolor($this->PICTURE_WIDTH,$this->PICTURE_HEIGHT); $this->WORD=mb_convert_encoding($this->FONT_WORD,'utf-8','gb2312'); /* Get the range of text using TrueType font */ $TEMP = imagettfbbox($this->FONT_SIZE,0,$this->FONT_PATH,$this->WORD); $WORD_LENGTH=strlen($this->WORD); $WORD_WIDTH =$TEMP[2] - $TEMP[6]; $WORD_HEIGHT =$TEMP[3] - $TEMP[7]; /* The default position of the text watermark is the lower right corner */ if($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 } ?> |
希望本文所述对大家的php程序设计有所帮助。
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