140 lines
4.6 KiB
PHP
140 lines
4.6 KiB
PHP
<?php
|
||
namespace app\service;
|
||
|
||
use think\Exception;
|
||
|
||
/**
|
||
* GD2库绘画
|
||
* Class GdTool
|
||
* @package app\service
|
||
*/
|
||
class GdTool
|
||
{
|
||
|
||
/**
|
||
* 生成海报
|
||
* 背景尺寸固定： 750 * 1334
|
||
*
|
||
* @param string $srcQr 生成的二维码base64值
|
||
* @param string $bgImg 背景图片 自定义背景图
|
||
* @param string $savePath 海报保存路径，为空则返回base64值
|
||
* @return bool|string
|
||
* @throws \Exception
|
||
*/
|
||
public static function generatePoster(string $srcQr='', string $bgImg = '', string $savePath = '')
|
||
{
|
||
try {
|
||
if (!empty($savePath)) {
|
||
if (!is_dir($savePath)) {
|
||
@mkdir($savePath, 0777, true);
|
||
}
|
||
if (!is_dir($savePath) || !is_writeable($savePath)) {
|
||
throw new \Exception('无法保存');
|
||
}
|
||
}
|
||
|
||
//1、创建画布资源
|
||
// 背景尺寸： 750 * 1334
|
||
$defBga = app()->getRootPath().'public/static/images/poster-bg1.png';
|
||
$srcBga = empty($bgImg) ? $defBga : $bgImg;
|
||
$bgInfo = @getimagesize($srcBga);
|
||
if ($bgInfo[0] != 750 || $bgInfo[1] != 1334) {
|
||
throw new \Exception('海报模板尺寸不正确！');
|
||
}
|
||
|
||
if (!$bgInfo) {
|
||
throw new \Exception('海报背景图资源不存在！');
|
||
}
|
||
|
||
$ext = $bgInfo['mime'];
|
||
$extName = '';
|
||
$img = null;
|
||
switch ($ext) {
|
||
case 'image/jpeg':
|
||
$img = @imagecreatefromjpeg($srcBga);
|
||
$extName = 'jpg';
|
||
break;
|
||
case 'image/png':
|
||
$img = @imagecreatefrompng($srcBga);
|
||
$extName = 'png';
|
||
break;
|
||
}
|
||
if (!$img) {
|
||
throw new \Exception('无效背景图');
|
||
}
|
||
|
||
//2、准备颜色
|
||
$black = imagecolorallocate($img,0,0,0);
|
||
$while = imagecolorallocate($img,255,255,255);
|
||
$faColor = imagecolorallocate($img,0,104,51);
|
||
|
||
// 邀请人头像
|
||
// $headimgurl = 'https://thirdwx.qlogo.cn/mmopen/vi_32/Q0j4TwGTfTJXE3Zz0U5edXYI2icicYibSNwwezWe0X92fovRtpUwdCF5lAmjsYK5EWT3R8ItO0BEqynElYhWibRqDg/132';
|
||
// $headimg = imagecreatefromstring(file_get_contents($headimgurl));
|
||
// imagecopymerge($img, $headimg, 50, 1000, 0, 0, 120, 120, 100);
|
||
// imagecopyresampled($img, $headimg, 90, 900, 0, 0, 120, 120, 120, 120);
|
||
|
||
// 添加文字
|
||
// imagettftext($img, 18, 0, 220, 1100, 250, public_path().'static/simheittf.ttf', '超级凉面...邀您关注');
|
||
|
||
//填充画布（背景色）
|
||
imagefill($img,0,0, $while);
|
||
|
||
// 组合二维码图片 ，坐标：x:246; y:959
|
||
$prefixPng = 'data:image/png;base64,';
|
||
$qrStr = base64_decode(str_replace($prefixPng,"",$srcQr));
|
||
$qrImg = @imagecreatefromstring($qrStr);
|
||
list($qrWidth, $qrHeight) = getimagesize($srcQr);
|
||
if(!$qrImg) {
|
||
imagedestroy($img);
|
||
throw new \Exception('无效二维码');
|
||
}
|
||
$imgQrW = $imgQrH = 274;
|
||
imagecopyresampled($img, $qrImg, 456, 959, 0, 0, $imgQrW, $imgQrH, $qrWidth, $qrHeight);
|
||
|
||
imagedestroy($qrImg);
|
||
//4、输出与保存最终图像(保存文件或返回base64)
|
||
|
||
|
||
if (empty($savePath)) {
|
||
/* 返回base64 */
|
||
ob_start();
|
||
if ($ext == 'image/jpeg') {
|
||
imagejpeg($img);
|
||
} else {
|
||
imagepng($img);
|
||
}
|
||
|
||
$imgData = ob_get_contents();
|
||
ob_end_clean();
|
||
imagedestroy($img);
|
||
|
||
$prefix = 'data:image/jpg/png/gif;base64,';
|
||
return $prefix.base64_encode($imgData);
|
||
|
||
} else {
|
||
/* 保存到文件*/
|
||
$fileName = md5(microtime(true)).'.'.$extName;
|
||
$saveFile = $savePath."/".$fileName;
|
||
if ($ext == 'image/jpeg') {
|
||
imagejpeg($img, $saveFile);
|
||
} else {
|
||
imagepng($img, $saveFile);
|
||
}
|
||
}
|
||
|
||
/*
|
||
* 输出显示
|
||
header("content-type: image/png");
|
||
imagepng($img);
|
||
*/
|
||
|
||
//5、释放画布资源
|
||
imagedestroy($img);
|
||
} catch (\Exception $e) {
|
||
throw $e;
|
||
}
|
||
|
||
return true;
|
||
}
|
||
} |