308 lines
10 KiB
PHP
308 lines
10 KiB
PHP
<?php
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namespace app\common\library\share;
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/**
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* 分享海报
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*/
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class Poster
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{
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//海报元素最小变局
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protected static $minPadding = 0.9;
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//海报基准宽度
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protected static $basicWidth = 1024;
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/**
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* 创建海报
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* @param $nickName 昵称
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* @param $avatar 头像
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* @param $qrCode 二维码
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* @param $themes 风格 blue balck steel
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* @return false|string
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*/
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public static function mkPoster($nickName,$avatar,$qrCode,$themes='blue') {
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$bgPath = MODULE_ROOT.'/public/assets/poster/'.$themes.'.jpg';
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$fontPath = MODULE_ROOT."/public/assets/poster/font/ding/DingTalk_JinBuTi_Regular.ttf";
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$posterItems = self::getPosterItems($themes,$nickName,$avatar,$qrCode);
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//用户信息
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//这是要插入到图片的文字
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if ($bgPath) {
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if (is_file($bgPath)) {
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//创建画布
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$bgCanvas = imagecreatefromstring(file_get_contents($bgPath));
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$bgW = imagesx($bgCanvas);
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$contrastSize =$bgW /self::$basicWidth ;
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foreach ($posterItems as $item){
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if($item['attr']['x'] < (1-self::$minPadding) * $bgW){
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$item['attr']['x'] = (1-self::$minPadding) * $bgW;
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}
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$sizeFields = ['x','y','w','h','size'];
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foreach ($item['attr'] as $key => $option){
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if(in_array($key,$sizeFields)){
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$item['attr'][$key] = $option * $contrastSize;
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}
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}
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switch ($item['type']){
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case 'text':
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$fontBox = imagettfbbox($item['attr']['size'], 0, $fontPath, $item['attr']['text']);
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$newText = self::handleTextAlign($bgW,$fontBox[2],$item['attr']['text']);
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if($newText != $item['attr']['text']){
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$item['attr']['text'] = $newText;
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$fontBox = imagettfbbox($item['attr']['size'], 0, $fontPath, $item['attr']['text']);
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}
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if(isset($item['align']) && $item['align']=='center'){
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$item['attr']['x'] = ceil(($bgW - $fontBox[2])/2);
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}
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$color = ImageColorAllocate($bgCanvas, $item['attr']['color'][0],$item['attr']['color'][1],$item['attr']['color'][2]);
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imagettftext($bgCanvas, $item['attr']['size'], $item['attr']['angle'], $item['attr']['x'], $item['attr']['y'], $color,$fontPath, $item['attr']['text']);
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break;
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case 'image':
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if(isset($item['align']) && $item['align']=='center'){
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$item['attr']['x'] = ceil(($bgW - $item['attr']['w'])/2);
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}
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imagecopyresampled($bgCanvas, $item['attr']['src_image'], $item['attr']['x'], $item['attr']['y'], 0, 0, $item['attr']['w'], $item['attr']['h'], imagesx($item['attr']['src_image']), imagesy($item['attr']['src_image']));
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break;
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}
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}
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ob_start();
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imagepng($bgCanvas);
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$imgSrc = base64_encode(ob_get_contents());
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ob_end_clean();
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//生成图片
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return $imgSrc;
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}
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}
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return false;
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}
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/**
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* 处理规定宽度内自动换行（imagettftext）
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* @return void
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*/
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private static function handleTextAlign($bgW,$txtW,$text)
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{
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$minBgWidth = $bgW * self::$minPadding;
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if($txtW <= $minBgWidth){
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return $text;
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}
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$maxLineWordsLength = ceil(mb_strlen($text) * ($minBgWidth/ $txtW));
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$string = '';
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foreach (mb_str_split($text) as $index => $t){
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$string .= $t;
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if($index > 0 && ($index % $maxLineWordsLength) == 0){
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$string .= "\n";
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}
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}
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return $string;
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}
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/**
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* 获取海报元素
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* @param $bgType 海报背景类型
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* @param $nickName 昵称
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* @param $avatar 头像
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* @param $qrCode 二维码
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* @return array|array[]
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*/
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public static function getPosterItems($bgType,$nickName,$avatar,$qrCode){
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$items = [
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'nickname'=>[
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'type'=>'text',
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'align'=>'center',
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'attr'=>[
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'size'=>36,//字体大小
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'x'=>480,//x轴
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'y'=>380,//y轴
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'text'=>$nickName,//内容
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'angle'=>0,//角度,
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'color'=>[255,255,255]//字体颜色rgb
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]
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],
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'recommend'=>[
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'type'=>'text',
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'align'=>'center',
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'attr'=>[
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'size'=>26,//字体大小
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'x'=>360,//x轴
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'y'=>430,//y轴
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'text'=>'向你推荐优质知识店铺',//内容
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'angle'=>0,//角度,
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'color'=>[255,255,255]//字体颜色rgb
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]
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],
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'tip'=>[
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'type'=>'text',
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'align'=>'center',
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'attr'=>[
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'size'=>20,//字体大小
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'x'=>400,//x轴
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'y'=>1010,//y轴
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'text'=>'长按识别，查看好课',//内容
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'angle'=>0,//角度,
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'color'=>[0,0,0]//字体颜色rgb
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]
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],
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'other'=>[
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'type'=>'text',
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'align'=>'center',
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'attr'=>[
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'size'=>30,//字体大小
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'x'=>400,//x轴
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'y'=>1210,//y轴
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'text'=>'不可错过的精品课程',//内容
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'angle'=>0,//角度,
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'color'=>[255,255,255]//字体颜色rgb
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]
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],
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'other1'=>[
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'type'=>'text',
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'align'=>'center',
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'attr'=>[
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'size'=>35,//字体大小
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'x'=>400,//x轴
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'y'=>1280,//y轴
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'text'=>'邀请你和我一起成长',//内容
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'angle'=>0,//角度,
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'color'=>[255,255,255]//字体颜色rgb
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]
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],
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'avatar'=>[
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'type'=>'image',
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'align'=>'center',
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'attr'=>[
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'x'=>440,//x轴
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'y'=>140,//y轴
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'w'=>160,//宽度
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'h'=>160,//高度
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'src_image'=>'',//图像资源
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]
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],
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'qrcode'=>[
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'type'=>'image',
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'align'=>'center',
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'attr'=>[
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'x'=>400,//x轴
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'y'=>730,//y轴
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'w'=>240,//宽度
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'h'=>240,//高度
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'src_image'=>'',//图像资源
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]
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]
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];
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if($bgType=='steel'){
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$items['other1']['attr']['color'] = [209,141,56];
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$items['other']['attr']['color'] = [209,141,56];
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$items['tip']['attr']['color'] = [255,255,255];
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$items['qrcode']['attr']['y'] -= 160;
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$items['tip']['attr']['y'] -= 160;
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$items['other']['attr']['y'] -= 240;
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$items['other1']['attr']['y'] -= 240;
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}
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if($bgType=='black'){
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$items['qrcode']['attr']['y'] -= 100;
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$items['tip']['attr']['y'] -= 100;
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$items['tip']['attr']['color'] = [255,255,255];
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$items['other']['attr']['y'] -= 100;
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$items['other1']['attr']['y'] -= 100;
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}
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$items['qrcode']['attr']['src_image'] = imagecreatefromstring($qrCode);
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$items['avatar']['attr']['src_image'] = imagecreatefromstring(self::convertToCircleFromData($avatar));
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return $items;
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}
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/**
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* 图片转圆形
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* @param $imageData 二进制图片数据
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* @return false|string
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*/
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public static function convertToCircleFromData($imageData) {
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// 创建内存中的图像资源
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$image = imagecreatefromstring($imageData);
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if (!$image) {
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return $imageData;
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}
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// 获取图像的宽度和高度
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$width = imagesx($image);
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$height = imagesy($image);
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// 创建一个新的透明图像
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$mask = imagecreatetruecolor($width, $height);
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imagesavealpha($mask, true);
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$transparent = imagecolorallocatealpha($mask, 0, 0, 0, 127);
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imagefill($mask, 0, 0, $transparent);
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// 绘制圆形
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$centerX = $width / 2;
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$centerY = $height / 2;
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$radius = min($width, $height) / 2;
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imagefilledellipse($mask, $centerX, $centerY, $radius * 2, $radius * 2, imagecolorallocate($mask, 255, 255, 255));
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// 创建一个新的透明图像来存储最终结果
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$output = imagecreatetruecolor($width, $height);
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imagesavealpha($output, true);
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imagefill($output, 0, 0, $transparent);
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// 应用遮罩到原始图像
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for ($x = 0; $x < $width; $x++) {
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for ($y = 0; $y < $height; $y++) {
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$maskColor = imagecolorat($mask, $x, $y);
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$alpha = 127 - ($maskColor >> 24);
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if ($alpha > 0) {
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$imageColor = imagecolorat($image, $x, $y);
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$r = ($imageColor >> 16) & 0xFF;
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$g = ($imageColor >> 8) & 0xFF;
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$b = $imageColor & 0xFF;
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$newColor = imagecolorallocatealpha($output, $r, $g, $b, 127 - $alpha);
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imagesetpixel($output, $x, $y, $newColor);
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}
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}
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}
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// 保存处理后的图像到内存
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ob_start();
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imagepng($output);
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$result = ob_get_clean();
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// 释放图像资源
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imagedestroy($image);
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imagedestroy($mask);
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imagedestroy($output);
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return $result;
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}
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} |