Common.php
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<?php
/**
* Author: lang
* Email: 732853989@qq.com
* Date: 2022/12/9
* Time: 15:53
*/
namespace Kkokk\Poster\Common;
class Common
{
protected $imType = [
'gif' => 'imagegif',
'jpeg' => 'imagejpeg',
'jpg' => 'imagejpeg',
'png' => 'imagepng',
'wbmp' => 'imagewbmp'
];
// 转base64
public function baseData($image, $type = 'png')
{
$baseData = '';
if (is_resource($image) || is_object($image)) {
ob_start();
$this->imType[$type]($image);
$data = ob_get_contents();
ob_end_clean();
$baseData = 'data:image/' . $type . ';base64,' . base64_encode($data);
imagedestroy($image);
} elseif (is_string($image)) {
$baseData = 'data:image/' . $type . ';base64,' . base64_encode($image);
}
return $baseData;
}
/**
* 输出图片
* Author: lang
* Email: 732853989@qq.com
* Date: 2022/12/15
* Time: 10:44
* @param $im
* @param string $dir
* @param string $type
* @param int $quality
*/
public function imOutput($im, $dir = '', $type = 'png', $quality = 75)
{
if ($type == 'jpg' || $type == 'jpeg') {
$this->imType[$type]($im, $dir, $quality);
} else {
$this->imType[$type]($im, $dir);
}
return 1;
}
/**
* 计算 三个点的叉乘 |p1 p2| X |p1 p|
* Author: lang
* Email: 732853989@qq.com
* Date: 2022/12/15
* Time: 10:44
* @param int $p1
* @param int $p2
* @param int $p
* @return int
*/
public function getCross($p1, $p2, $p)
{
// (p2.x - p1.x) * (p.y - p1.y) -(p.x - p1.x) * (p2.y - p1.y);
return ($p1[0] - $p[0]) * ($p2[1] - $p[1]) - ($p2[0] - $p[0]) * ($p1[1] - $p[1]);
}
}