- <?php
- class avatar
- {
- private $fileName; //文件的绝对路径(或基于最终调用文件的相对路径)
- private $rgb; //颜色索引(数组 array(255,255,0) 或 16进制值 ffff00/#ffff00/ff0/#ff0)
- private $size; //图像大小
- private $imgInfo; //图像信息
- /**
- * 初始化
- * Enter description here ...
- * @param string $fileName 文件的绝对路径(或基于最终调用文件的相对路径)
- * @param mixed $rgb 颜色索引(数组 array(255,255,0) 或 16进制值 ffff00/#ffff00/ff0/#ff0)
- * @param int $size 图像大小
- */
- public function __construct($fileName, $rgb, $size)
- {
- $this->fileName = $fileName;
- if(is_array($rgb)){
- $this->rgb = $rgb; //rgb颜色数组 array(255,255,0)
- }else{
- //有的人喜欢带#号
- $rgb = trim($rgb, '#');
- //处理缩写形式
- if (strlen($rgb)==3){
- $_tmp = $rgb[0].$rgb[0].$rgb[1].$rgb[1].$rgb[2].$rgb[2];
- $rgb = $_tmp;
- }
- $this->rgb = $this->createRGB($rgb); //16进制值 ffff00
- }
- $this->size = $size;
- $this->imgInfo = getimagesize($this->fileName);
- if(!$this->imgInfo){
- throw Exception("无法读取图像文件");
- }
- if(!in_array($this->imgInfo[2], array(2,3))){
- //仅允许jpg和png
- throw Exception("图像格式不支持");
- }
- }
- /**
- * 显示图像
- * Enter description here ...
- */
- public function show()
- {
- header("content-type:image/png");
- $shadow = $this->createshadow(); //遮罩图片
- //创建一个方形图片
- $imgbk = imagecreatetruecolor($this->size, $this->size); //目标图片
- switch ($this->imgInfo[2]){
- case 2:
- $imgfk = imagecreatefromjpeg($this->fileName); //原素材图片
- break;
- case 3:
- $imgfk = imagecreatefrompng($this->fileName); //原素材图片
- default:
- return ;
- break;
- }
- $realSize = $this->imgInfo[0]<$this->imgInfo[1]? $this->imgInfo[0] : $this->imgInfo[1];
- imagecopyresized($imgbk, $imgfk, 0, 0, 0, 0, $this->size, $this->size, $realSize, $realSize);
- imagecopymerge($imgbk, $shadow, 0, 0, 0, 0, $this->size, $this->size, 100);
- //创建图像
- imagepng($imgbk);
- //销毁资源
- imagedestroy($imgbk);
- imagedestroy($imgfk);
- imagedestroy($shadow);
- }
- /**
- * 创建一个圆形遮罩
- * Enter description here ...
- * @param array 10进制颜色数组
- */
- private function createshadow()
- {
- $img = imagecreatetruecolor($this->size, $this->size);
- imageantialias($img, true); //开启抗锯齿
- $color_bg = imagecolorallocate($img, $this->rgb[0], $this->rgb[1], $this->rgb[2]); //背景色
- $color_fg = imagecolorallocate($img, 0, 0, 0); //前景色,主要用来创建圆形
- imagefilledrectangle($img, 0, 0, 200, 200, $color_bg);
- imagefilledarc($img, 100, 100, 200, 200, 0, 0, $color_fg, IMG_ARC_PIE);
- imagecolortransparent($img, $color_fg); //将前景色转换为透明
- return $img;
- }
- /**
- * 将字符形式16进制串转为10进制
- * Enter description here ...
- * @param $str
- */
- private function getIntFromHexStr($str)
- {
- $format = '0123456789abcdef';
- $sum = 0;
- for($i=strlen($str)-1, $c=0, $j=0; $i>=$c; $i--,$j++){
- $index = strpos($format, $str[$i]);//strpos从0计算
- $sum+=$index * pow(16,$j);
- }
- return $sum;
- }
- /**
- * 将16进制颜色转为10进制颜色值数组(RGB)
- * Enter description here ...
- * @param $str 16进制串(如:ff9900)
- */
- private function createRGB($str)
- {
- $rgb = array();
- if(strlen($str) != 6){
- $rgb[] = 0xff;
- $rgb[] = 0xff;
- $rgb[] = 0xff;
- return $rgb; //默认白色
- }
- $rgb[] = $this->getIntFromHexStr(substr($str, 0, 2));
- $rgb[] = $this->getIntFromHexStr(substr($str, 2, 2));
- $rgb[] = $this->getIntFromHexStr(substr($str, 4, 2));
- return $rgb;
- }
- }