方角图片转换成圆角图片

<?php

$start_time = time();

get_squre_circle_pic('logo.jpg');

$end_time = time();

echo date('i:s', $end_time - $start_time);

function get_squre_circle_pic($url,$path='./') {

$squre_url = resize_img($url, $path);

$w = 100; $h=100; // original size

$original_path= $url;

$dest_path = $path.uniqid().'.png';

$src = imagecreatefromstring(file_get_contents($original_path));

$newpic = imagecreatetruecolor($w,$h);

imagealphablending($newpic,false);

$transparent = imagecolorallocatealpha($newpic, 0, 0, 0, 127);

$r=$w/2;

for($x=0;$x<$w;$x++)

for($y=0;$y<$h;$y++){

$c = imagecolorat($src,$x,$y);

$_x = $x - $w/2;

$_y = $y - $h/2;

if((($_x*$_x) + ($_y*$_y)) < ($r*$r)){

imagesetpixel($newpic,$x,$y,$c);

}else{

imagesetpixel($newpic,$x,$y,$transparent);

}

}

imagesavealpha($newpic, true);

imagepng($newpic, $dest_path);

imagedestroy($newpic);

imagedestroy($src);

// unlink($url);

return $dest_path;

}

function resize_img($url,$path='./'){

$square_url = $path.uniqid().'.jpg';

$file = $url;

list($width, $height) = getimagesize($file); //获取原图尺寸

$percent = (100/$width);

//缩放尺寸

$newwidth = $width * $percent;

$newheight = $height * $percent;

$src_im = imagecreatefromjpeg($file);

$dst_im = imagecreatetruecolor($newwidth, $newheight);

imagecopyresized($dst_im, $src_im, 0, 0, 0, 0, $newwidth, $newheight, $width, $height);

imagejpeg($dst_im, $square_url); //输出压缩后的图片

imagedestroy($dst_im);

imagedestroy($src_im);

return $square_url;

}