php 方便水印和缩略图的图形类
时间:2018-12-30 分类:PHP 作者:编程之家用户
<div class="codetitle"><a style="CURSOR: pointer" data="80273" class="copybut" id="copybut80273" onclick="doCopy('code80273')"> 代码如下:
<div class="codebody" id="code80273">
<?php /
@author夜无眠27262681@qq.com
copyrighthttp://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,$color);
}else {
error("对不起,参数错误!");
}
//imagealphablending($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,$y,$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,$size,$width 2,$height
2,$color,$str); for($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($im,$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($im,$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,$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,$imc,$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);
$str = "
\n<span style="color:red" style="color:red">错误:\n".print_r($err->getTrace(),1)."\n ";
if($debug == true) {
file_put_contents(date('Y-m-d').".log",$str);
return $str;
}else{
die($str);
}
}
*/
?>