This article mainly introduces the general image processing class implemented by PHP, which can realize zooming, cutting, photo frame, watermark, Functions such as sharpening, rotating, flipping, transparency, and inverting colors have certain reference value. Friends in need can refer to it
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。