PHP图片处理类实现缩放、剪切、相框、水印、锐化、旋转、翻转、透明度、反色等功能

By admin

July 20, 2010 - 3 minutes read - 522 words

使用PHP来处理一下图片，还是不错的，下面是找到的一个PHP处理图片的类，可以实现图片的缩放、剪切、相框、水印、锐化、旋转、翻转、透明度、反色功能操作，够强大吧。文章比较长，所以分页显示，可以一页页复制代码整合就可以使用了。’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’]; $this->PICTURE_WIDTH=$SIZE[0]; $this->PICTURE_HEIGHT=$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){ $this->ZOOM_WIDTH=$this->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’]); } $FORCE_PICTURE_WIDTH=$SIZE[0]; $FORCE_PICTURE_HEIGHT=$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){ $CREATE_WIDTH=$FORCE_PICTURE_WIDTH-$this->FORCE_START_X; }else{ $CREATE_WIDTH=$this->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 } ?>

php类