php 方便水印和缩略图的图形类

2021-01-23 18:40:257

复制代码 代码如下:

/*

*@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, 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

for($ii=0;$ii

if(imagecolorat($im,$i,$ii) != $tm) {

$x_l = $i;

break(2);

}

}

}

for($i=0;$i

for($ii=$x_l;$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

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 = "

\n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);

}

}

*/

?>

这是简单的用法实例

复制代码 代码如下:

$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");

点击这里复制本文地址

以上内容由聚米学院网友整理呈现，如对侵犯您的权益，请联系邮箱：fzsbm@qq.com