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PHP使用 Imagick 擴(kuò)展實(shí)現(xiàn)圖片合成，圓角處理功能示例

更新時(shí)間：2019年09月09日 10:24:57 作者：hxmzzx

這篇文章主要介紹了PHP使用 Imagick 擴(kuò)展實(shí)現(xiàn)圖片合成，圓角處理功能,結(jié)合具體實(shí)例形式分析了PHP使用 Imagick 擴(kuò)展的圖形處理、生成相關(guān)操作技巧,需要的朋友可以參考下

本文實(shí)例講述了PHP使用 Imagick 擴(kuò)展實(shí)現(xiàn)圖片合成，圓角處理功能。分享給大家供大家參考，具體如下：

需求：為用戶生成特定的二維碼，拉取用戶的微信頭像和特定的背景圖合成一張用戶專屬海報(bào)

方法：采用PHP的Imagick擴(kuò)展功能對(duì)圖片進(jìn)行合成處理。對(duì)微信頭像進(jìn)行圓角處理，然后壓縮圖片的質(zhì)量

1. 根據(jù)微信用戶特定id生成專屬二維碼

public static function getTicket($scene_id)
{
  $qrcode = '{"expire_seconds": 2592000, "action_name": "QR_SCENE", "action_info": {"scene": {"scene_id": $scene_id }}}'; //二維碼信息
  $access_token = self::getToken();  //公眾號(hào)token，這個(gè)要獲取自己公眾號(hào)的
  $getticket_url = "https://api.weixin.qq.com/cgi-bin/qrcode/create?access_token=$access_token";
  $ticketinfo = self::request_by_curl($getticket_url,$qrcode);
  return $ticketinfo['ticket']; //專屬二維碼的ticken
}
public static function request_by_curl($remote_server, $post_string='')
{
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $remote_server);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST");
    curl_setopt($ch, CURLOPT_POSTFIELDS, $post_string);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_AUTOREFERER, 1);
    curl_setopt($ch, CURLOPT_HTTPHEADER, array("Expect: "));
    curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (compatible; MSIE 5.01; Windows NT 5.0)');
    $content = curl_exec($ch);
    curl_close($ch);
    $reArr=json_decode($content,true);
    return $reArr;
}

2、合成海報(bào)

public function CompositeImage ($ticket, $wxnick, $userId)
{
  $Qrcode = new Imagick("https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket=$ticket");
  $Qrcode->setImageResolution(0.1,0.3);   //設(shè)置圖片分辨率
  $QrcodeWH = $Qrcode->getImageGeometry();  //獲取源圖片寬和高
  if ($QrcodeWH['width']>200) {
   $QrcodeW['width'] = 200;
   $QrcodeH['height'] = $QrcodeW['width']/$QrcodeWH['width']*$QrcodeWH['height'];
  } else {
   $QrcodeW['width'] = $QrcodeWH['width'];
   $QrcodeH['height'] = $QrcodeWH['height'];
  }
   $Qrcode->thumbnailImage( $QrcodeW['width'], $QrcodeWH['height'], true ); //按照選定的比例進(jìn)行縮放
  // 預(yù)先下載微信頭像，再生成合成信息
   $curl  = curl_init($wxnick);
   $wxnickpath = "upload/wxnick/".$userId.".jpg";
   curl_setopt($curl,CURLOPT_RETURNTRANSFER,1);
   $imageData = curl_exec($curl);
   curl_close($curl);
   $tp = @fopen($wxnickpath, 'a');
   fwrite($tp, $imageData);
   fclose($tp);
   $weixin = new Imagick($wxnickpath);
   $weixin->setImageResolution(0.1,0.3);
   $weixin->roundCorners(360,360);   //圓角處理
   $wxWH = $weixin->getImageGeometry();
   if ($wxWH['width']>200) {
 $wxW['width'] = 200;
 $wxH['height'] = $wxW['width']/$wxWH['width']*$wxWH['height'];
   } else {
 $wxW['width'] = $wxWH['width'];
 $wxH['height'] = $wxWH['height'];
   }
   $weixin->thumbnailImage( $wxW['width'], $wxWH['height'], true );//等比例縮放
   //創(chuàng)建一個(gè)Imagick對(duì)象，同時(shí)獲取要處理的背景圖 /data/wenda/htdocs/upload
 $poster = new Imagick( "/data/wenda/htdocs/upload/poster.png" );
 $posterWH = $poster->getImageGeometry();
 $posterW['width'] = $posterWH['width'];
 $posterH['height'] = $posterWH['height'];
 // 按照縮略圖大小創(chuàng)建一個(gè)有顏色的圖片
 $canvas = new Imagick();
 $canvas->newImage( $posterW['width'], $posterH['height'], 'black', 'jpg' );
 //二維碼 微信頭像 背景 合成
 $poster->compositeImage($Qrcode,Imagick::COMPOSITE_OVER,275,960);
 $poster->compositeImage($weixin,Imagick::COMPOSITE_OVER,275,402);
 $canvas->compositeImage( $poster, imagick::COMPOSITE_OVER, 0, 0);
 $canvas->setImageCompressionQuality(60); //壓縮質(zhì)量
 $canvas->writeImage( "/upload/poster/$userId.jpg" ); //生成圖片
 return $canvas; //返回圖片流信息
}
header( "Content-Type: image/jpg" );  //輸出圖片
$posterimg = $this->CompositeImage($Fticket, $Fwnick, $userId);
echo $posterimg //輸出圖片

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希望本文所述對(duì)大家PHP程序設(shè)計(jì)有所幫助。

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