php 方便水印和缩略图的图形类
2015-01-24信息快讯网
<?php /* *@author 夜无眠 [email protected] *copyright http://www.gowake.cn */ class img { function __construct($arg = null) { $args = func_get_args(); if($arg == null) { return null; } $this->im = call_user_func_array(array($this,'create'),$args); } function __call($func,$arg) { if(function_exists('image'.$func)) { $funcstr = 'image'.$func; }elseif (function_exists($func)){ $funcstr = $func; }else { error("没有这个类方法或函数"); } return call_user_func_array($funcstr,$arg); } /* *创建图像 *@param string/int 图片文件路径或者宽度 *@param int 高度,可省略 *@param string 6位16进制整数 */ function create($arg = null) { $args = func_get_args(); if(is_file($args[0])) { $this->file = $args[0]; $size = getimagesize($this->file) or error('图片类型错误'); $this->size = $this->size ? $this->size : $size; $type = image_type_to_extension($size[2],false); $this->type = $this->type ? $this->type : $type; $createfunc = 'imagecreatefrom'.$type; $im = $createfunc($this->file); }elseif((int)$args[0]>0 and (int)$args[1]>0) { $im = imagecreatetruecolor((int)$args[0],(int)$args[1]) or error("对不起,参数错误!"); if(!$args[2]) { $color = hexdec('7fffffff'); imagecolortransparent($im,$color); }else { $color = hexdec(str_replace('#','',$args[2])); } $this->size = $this->size ? $this->size : array((int)$args[0] ,(int)$args[1]); imagefill($im, 1, 1, $color); }else { error("对不起,参数错误!"); } //imagealphablending($im,false);//这两行用来记录透明通道 imagesavealpha($im,true); imageinterlace($im,true);//开启隔行扫描 return $im; } /* *生成缩略图 *@param int $w 新图片的宽度 *@param int $h 新图片的宽度 *@param string/bool $color 可选,新图片的背景色,false或空为透明 *@param bool $lashen 可选,是否拉伸,默认不拉伸 */ function suolue($w = null,$h = null,$color = false,$lashen = false) { $w_o = imagesx($this->im); $h_o = imagesy($this->im); if($w == null and $h != null) { $w = $h * $w_o/$h_o; }elseif ($w != null and $h == null){ $h = $w * $h_o/$w_o; } $this->size = null; $im = $this->create($w,$h,$color); $w_n = $w; $h_n = $h; if($w_o/$h_o > $w/$h) { $h_n = $w*$h_o/$w_o; $y = ($h-$h_n)/2; }elseif ($w_o/$h_o < $w/$h){ $w_n = $h*$w_o/$h_o; $x = ($w-$w_n)/2; } if($lashen) { $w_n = $w; $h_n = $h; $x = 0; $y = 0; } imagecopyresampled($im,$this->im,$x,$y,0,0,$w_n,$h_n,$w_o,$h_o); //imagedestroy($this->im); $this->im = $im; return $im; } /* *在图片上写字 *@param string $str 要写的字符串 *@param array $arg 字符串相关的参数,为一个关联数组,left 为距左边距离,right为距右边距离,left优先,top为距顶部距离,bottom为距底部距离,top优先;angle为角度,color为6位数16进制颜色,touming为文字透明度,font为字体文件 */ function write($str = '' , $arg = array()) { $size = $arg['size'] ? $arg['size'] : 20; $angle = $arg['angle'] ? $arg['angle'] : 0 ; $color = $arg['color'] ? $arg['color'] : '000000'; $touming = $arg['touming'] ? $arg['touming'] : 100; $touming = dechex((100-$touming)*127/100); $color = hexdec($touming.str_replace("#","",$color)); $font = $arg['font'] ? $arg['font'] : 'arial.ttf'; $boxarr = imagettfbbox($size,$angle,$font,$str); $w = imagesx($this->im); $h = imagesy($this->im); $x_l = $x_r = $boxarr[0]; $y_t = $y_b = $boxarr[1]; for($i=0;$i<7;$i = $i+2) { $x_l = $boxarr[$i] < $x_l ? $boxarr[$i] : $x_l; $x_r = $boxarr[$i] > $x_r ? $boxarr[$i] : $x_r; $y_t = $boxarr[$i+1] < $y_t ? $boxarr[$i+1] : $y_t; $y_b = $boxarr[$i+1] > $y_b ? $boxarr[$i+1] : $y_b; } $width = $x_r - $x_l; $height = $y_b - $y_t; /*获取精确偏移量*/ $im = $this->create($width*4,$height*4); $tm = hexdec('7fffffff'); imagettftext($im,$size,$angle,$width*2,$height*2,$color,$font,$str); for($i=0;$i<$width*4;$i++) { for($ii=0;$ii<$height*4;$ii++) { if(imagecolorat($im,$i,$ii) != $tm) { $x_l = $i; break(2); } } } for($i=0;$i<$height*4;$i++) { for($ii=$x_l;$ii<$width*4;$ii++) { if(imagecolorat($im,$ii,$i) != $tm) { $y_t = $i; break(2); } } } for($i=$width*4-1;$i>0;$i--) { for($ii=$y_t;$ii<$height*4;$ii++) { if(imagecolorat($im,$i,$ii) != $tm) { $x_r = $i; break(2); } } } for($i=$height*4-1;$i>0;$i--) { for($ii=$x_l;$ii<=$x_r;$ii++) { if(imagecolorat($im,$ii,$i) != $tm) { $y_b = $i; break(2); } } } $x_off = $x_l - $width*2; $y_off = $y_b - $height*2; $width = $x_r - $x_l; //精确宽度 $height = $y_b - $y_t; //精确高度 imagedestroy($im); if(isset($arg['left'])) { $x = (int)$arg['left'] - $x_off; }elseif (isset($arg['right'])){ $x = $w - (int)$arg['right'] - $width - $x_off; }else { $x = ($w - $width)/2 - $x_off; } if(isset($arg['top'])) { $y = (int)$arg['top'] - $y_off + $height; }elseif (isset($arg['bottom'])){ $y = $h - (int)$arg['bottom'] - $y_off; }else { $y = ($h + $height)/2 - $y_off; } imagettftext($this->im,$size,$angle,$x,$y,$color,$font,$str); return $this->im; } /* *合并图片(如图片水影) *@param string/resource $file 图片文件路径或这图片标识符 *@param array $arg 字符串相关的参数,为一个关联数组,left 为距左边距离,right为距右边距离,left优先,top为距顶部距离,bottom为距底部距离,top优先;touming为文字透明度 */ function merge($file,$arg = array()) { if(is_file($file)) { $imc = $this->create($file); }elseif(gettype($file)=='resource') { $imc = $file; }else { error("没有图片"); } $touming = $arg['touming'] ? (int)$arg['touming'] : 100 ; $w = imagesx($this->im); $h = imagesy($this->im); $width = imagesx($imc); $height = imagesy($imc); if(isset($arg['left'])) { $x = (int)$arg['left']; }elseif (isset($arg['right'])){ $x = $w - (int)$arg['right'] - $width; }else { $x = ($w - $width)/2; } if(isset($arg['top'])) { $y = (int)$arg['top']; }elseif (isset($arg['bottom'])){ $y = $h - $height - $arg['bottom']; }else { $y = ($h - $height)/2; } imagecopymergegray($this->im,$imc,$x,$y,0,0,$width,$height,$touming); } /* *输出图片 *@param string $type *@param string $filename 要转存的文件路径 *@param int $zhiliang jpeg图片特有的,图像清晰度 */ function display($type = null,$filename = null,$zhiliang = null) { if($type == null) { $type = $this->type ? $this->type : 'jpg'; } if(($type == 'jpeg' or $type == 'jpg') and $zhiliang == null) { $type = 'jpeg'; $zhiliang = 100; } if($filename == null) { header('Content-type: image/'.$type); } $displayfunc = 'image'.$type; $displayfunc($this->im,$filename,$zhiliang); imagedestroy($this->im); } function randcolor($a,$b) { $a = $a>255 ? 255 : (int)$a; $a = $a<0 ? 0 : (int)$a; $b = $b>255 ? 255 : (int)$b; $b = $b<0 ? 0 : (int)$b; for($i=0;$i<3;$i++) { $color .= str_pad(dechex(mt_rand($a,$b)), 2, "0", STR_PAD_LEFT); } return $color; } } /* function error($msg,$debug = false) { $err = new Exception($msg); $str = "<pre>\n<span style="color:red" style="color:red">错误:</span>\n".print_r($err->getTrace(),1)."\n</pre>"; if($debug == true) { file_put_contents(date('Y-m-d').".log",$str); return $str; }else{ die($str); } } */ ?>
这是简单的用法实例
$img = new img('a.png'); $m = $img->im; $im = $img->suolue(100); $img->im = $m; $img->suolue(300); $img->merge($m,array('left'=>0,'top'=>0,'touming'=>60)); $img->merge($im,array('right'=>0,'top'=>0,'touming'=>60)); $img->merge($im,array('left'=>0,'bottom'=>0,'touming'=>60)); $img->merge($im,array('right'=>0,'bottom'=>0,'touming'=>60)); $img->write("春天来了",array('left'=>0,'top'=>0,'size'=>30,'color'=>$img->randcolor(0,180),'angle'=>-45,'font'=>'simfang.ttf','touming'=>80)); $img->write("春天来了",array('left'=>0,'bottom'=>0,'size'=>30,'color'=>$img->randcolor(0,180),'angle'=>45,'font'=>'simfang.ttf','touming'=>80)); $img->write("春天来了",array('right'=>0,'bottom'=>0,'size'=>30,'color'=>$img->randcolor(0,180),'angle'=>-45,'font'=>'simfang.ttf','touming'=>80)); $img->write("春天来了",array('right'=>0,'top'=>0,'size'=>30,'color'=>$img->randcolor(0,180),'angle'=>45,'font'=>'simfang.ttf','touming'=>80)); $img->display("gif");