Cet article vous présente principalement la solution parfaite au flou d'image HTML5 Canvas. Les amis qui en ont besoin peuvent s'y référer. J'espère qu'il pourra aider tout le monde.
1. J'ai récemment utilisé le canevas h5 pour dessiner des animations et j'ai trouvé que l'image était particulièrement floue. Plus tard, j'ai finalement découvert que le coupable était le code
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1,maximum-scale=1,user-scalable=no" />
Copier après la connexion
, car cette ligne de code était étirée
2. L'effet de flou de l'image :
3. L'effet après suppression de la compression
Vous pouvez changer le code en
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<meta name="viewport" content="user-scalable=no" />
<title>赛事详细页</title>
<script src="js/rem.js" type="text/javascript" charset="utf-8"></script>
<link rel="stylesheet" type="text/css" href="css/m_reset.css" />
<link rel="stylesheet" type="text/css" href="css/gameListsNew.css" />
<link href="css/mask.css" rel="stylesheet" />
</head>
<body>
<p class="tipMask">
<p class="tipBox">
<img src="img/faileTip.png" class="tipsImg" />
<p class="fileBtn">
<img src="img/fileBtn.png" />
<span class="tryAgain">再试一次</span>
</p>
</p>
</p>
<p>
<img src="img/whiteBack.png" class="titleImg" />
<p class="bgEvent" id="contentbody">
<p id="eventDetail" v-cloak>
<!--标题-->
<p class="detailevent">
<p class="titlevs">
<img class="teamFlagLogo" onerror="nofind(this);" :src="'img/teamlogonew/'+eventDetail.HomeTeamID+'.png'" />
<p class="countryName">
{{eventDetail.HomeTeamName}}
</p>
</p>
<p class="titlevs" style="padding-top:0.3rem ;">
<p>
<!--未开赛-->
<!--<p class="theWorldCup">世界杯</p>-->
<p class="theGameNowDataTime">{{eventDetail.TimeFormat }}</p>
<p class="gameBeginTime">{{getScoreOrVs(eventDetail.HomeTeamScore,eventDetail.AwayTeamScore)}}</p>
</p>
<!--开赛时长-->
<!--<p>
<p>73:40</p>
</p>-->
</p>
<p class="titlevs">
<img class="teamFlagLogo" onerror="nofind(this);"
:src="'img/teamlogonew/'+eventDetail.AwayTeamID+'.png'" />
<p class="countryName">
{{eventDetail.AwayTeamName}}
</p>
</p>
</p>
<p id="ordersuccess" class="ordersuccess">
<p style="text-align:right;padding-top:0.2rem;padding-left:0.2rem;">
<img src="img/ordersuccess/close.png" style="width:0.45rem;height:0.45rem;" id="closesuccess" onclick="closesuccess();" />
</p>
<p class="teamname">
<p class="teamnameitem"><p class="teamnameitemtop">{{eventDetail.HomeTeamName}}</p><br /><p class="teamnameitembottom">HOME</p></p>
<p class="teamnameitem "><p class="teamnameitemmiddle">VS</p></p>
<p class="teamnameitem"><p class="teamnameitemtop">{{eventDetail.AwayTeamName}}</p><br /><p class="teamnameitembottom">AWAY</p></p>
</p>
<p class="teamdetail">
<p class="teamdate"><span>{{eventDetail.CompetitionName}}</span><span>/</span><span>{{eventDetail.DateFormat}}</span></p>
<p class="teamplaysselection">
<table style="width:100%;text-align:left;height:100%;">
<tr>
<td class="teamplaysselectiontop" style="width:50%;">玩法</td>
<td class="teamplaysselectiontop" style="width:50%;">选项</td>
</tr>
<tr>
<td class="teamplaysselectionbottom" style="width:50%;" id="rulename">Match Odds</td>
<td class="teamplaysselectionbottom" style="width:50%;" id="selectionname">Home</td>
</tr>
</table>
</p>
<p class="teamwinmoney">
<table style="width:90%;text-align:left;height:100%;">
<tr>
<td class="teamwinmoneytop" style="width:50%;">
本金
</td>
<td class="teamwinmoneytop" style="width:50%;">
赔率
</td>
<td class="teamwinmoneytop" style="width:50%;">
预赢
</td>
</tr>
<tr>
<td class="teamwinmoneybottom" style="width:50%;" id="betmoneysuc">1000</td>
<td class="teamwinmoneybottom" style="width:50%;" id="betodds">12.54</td>
<td class="teamwinmoneybottom" style="width:50%;" id="betwin">12540</td>
</tr>
</table>
</p>
</p>
</p>
</p>
<p>
<p class="square" id="square">
<canvas id="courtCaseNew" width="980" height="765"></canvas>
</p>
<img src="img/balllittle.png" style="width:20px;height:20px;display:none;" id="imgballNew" />
</p>
<p class="middlechat">
<p class="middleitem" id="jcc">
<p class="tabActive">竞猜场</p>
</p>
<p class="middleitem" id="jcjl">
<p class="tabCommon">竞猜记录</p>
</p>
<p class="middleitem" id="sssj">
<p class="tabCommon">赛事事件</p>
</p>
<p class="middleitem" id="jstj">
<p class="tabCommon">技术统计</p>
</p>
</p>
<p class="downChangrTab quizGames" style="display: block;">
<p id="ruleTypeItems" v-cloak>
<!--胜平负-->
<p class="diffPlaysTetx" v-for="(item,index) in eventDetail.Market" v-if="item.RuleType==100">
<span class="speciesName">赛果</span>
<span class="rotary" v-if="item.State!=1">(已封盘)</span>
<span class="speciesExp">猜90分钟(含补时)两队的比赛结果</span>
</p>
<p v-for="(item,index) in eventDetail.Market" v-if="item.RuleType==100" id="result" name="selectionItems" class="result">
<p v-bind:class="[(select.BackOdds<1.01 || item.State!=1) ? 'resutitemGray commonBorderGray':'resutitem commonBorder']" v-for="(select,index) in item.Selection"
v-on:click="select.BackOdds>=1.01 &&clickFun($event,item.State,select.BackOdds,item.MarketId,select.SelectionId,'赛果',select.SelectionName);" name="itemSelection">
<p class="winEquLose" v-bind:name="'item'+item.MarketId">{{select.SelectionName}}</p>
<p class="winEquLoseOdds " v-bind:name="'item'+item.MarketId">
<span v-bind:id="item.MarketId+select.SelectionId" v-bind:maxlimit="select.MaxStakeLimit">{{select.BackOdds}}</span>
<img src="img/upIng.png" style="width:0.2rem;display:none;" v-bind:id="'redOne'+item.MarketId+select.SelectionId" />
<img src="img/downIng.png" style="width:0.2rem;display:none;" v-bind:id="'greenOne'+item.MarketId+select.SelectionId" />
</p>
</p>
</p>
<!--单双-->
<p class="diffPlaysTetx" v-for="(item,index) in eventDetail.Market" v-if="item.RuleType==130">
<span class="speciesName">单双</span>
<span class="rotary" v-if="item.State!=1">(已封盘)</span>
<span class="speciesExp">猜90分钟(含补时)比赛总进球的单双</span>
</p>
<p id="oddeven" v-for="(item,index) in eventDetail.Market" v-if="item.RuleType==130" name="selectionItems" class="oddeven">
<p v-bind:class="[(select.BackOdds<1.01 || item.State!=1) ? 'oddevenitemGray commonBorderGray':'oddevenitem commonBorder']" v-for="(select,index) in item.Selection" v-on:click="select.BackOdds>=1.01 &&clickFun($event,item.State,select.BackOdds,item.MarketId,select.SelectionId,'单双',select.SelectionName)" name="itemSelection">
<p class="winEquLose" v-bind:name="'item'+item.MarketId" v-bind:id="'selectionname'+item.MarketId+select.SelectionId">{{select.SelectionName}}</p>
<p class="winEquLoseOdds" v-bind:name="'item'+item.MarketId">
<span v-bind:id="item.MarketId+select.SelectionId" v-bind:maxlimit="select.MaxStakeLimit">{{select.BackOdds}}</span>
<img src="img/upIng.png" style="width:0.2rem;display:none;" v-bind:id="'redOne'+item.MarketId+select.SelectionId" />
<img src="img/downIng.png" style="width:0.2rem;display:none;" v-bind:id="'greenOne'+item.MarketId+select.SelectionId" />
</p>
</p>
</p>
<!--总进球-->
<p class="diffPlaysTetx" v-for="(item,index) in eventDetail.Market" v-if="item.RuleType==410">
<span class="speciesName">总进球 </span>
<span class="rotary" v-if="item.State!=1">(已封盘)</span>
<span class="speciesExp">猜90分钟(含补时)比赛总进球的数 </span>
</p>
<p id="totalGoals" v-for="(item,index) in eventDetail.Market" v-if="item.RuleType==410" name="selectionItems" class="totalGoals">
<p v-bind:class="[(select.BackOdds<1.01 || item.State!=1) ? 'totalGoalitemGray commonBorderGray':'totalGoalitem commonBorder']" v-for="(select,index) in item.Selection" v-on:click="select.BackOdds>=1.01 &&clickFun($event,item.State,select.BackOdds,item.MarketId,select.SelectionId,'总进球',select.SelectionName)" name="itemSelection">
<p class="winEquLose" v-bind:name="'item'+item.MarketId" v-bind:id="'selectionname'+item.MarketId+select.SelectionId">{{select.SelectionName}}</p>
<p class="winEquLoseOdds" v-bind:name="'item'+item.MarketId">
<span v-bind:id="item.MarketId+select.SelectionId" v-bind:maxlimit="select.MaxStakeLimit">{{select.BackOdds}}</span>
<img src="img/upIng.png" style="width:0.2rem;display:none;" v-bind:id="'redOne'+item.MarketId+select.SelectionId" />
<img src="img/downIng.png" style="width:0.2rem;display:none;" v-bind:id="'greenOne'+item.MarketId+select.SelectionId" />
</p>
</p>
</p>
<!--全场比分-->
<p class="diffPlaysTetx" v-for="(item,index) in eventDetail.Market" v-if="item.RuleType==140">
<span class="speciesName">全场比分</span>
<span class="rotary" v-if="item.State!=1">(已封盘)</span>
<span class="speciesExp">猜90分钟(含补时)全场比分</span>
</p>
<p id="correctScoreHome" v-for="(item,index) in eventDetail.Market" v-if="item.RuleType==140" name="selectionItems" class="correctScoreHomeAway">
<p v-bind:class="[(select.BackOdds<1.01 || item.State!=1) ? 'correctScoreitemGray commonBorderGray':'correctScoreitem commonBorder']" v-for="(select,index) in item.Selection" v-on:click="select.BackOdds>=1.01 &&clickFun($event,item.State,select.BackOdds,item.MarketId,select.SelectionId,'全场比分',select.SelectionName)" name="itemSelection">
<p class="winEquLose" v-bind:name="'item'+item.MarketId" v-bind:id="'selectionname'+item.MarketId+select.SelectionId">{{select.SelectionName}}</p>
<p class="winEquLoseOdds" v-bind:name="'item'+item.MarketId">
<span v-bind:id="item.MarketId+select.SelectionId" v-bind:maxlimit="select.MaxStakeLimit">{{select.BackOdds}}</span>
<img src="img/upIng.png" style="width:0.2rem;display:none;" v-bind:id="'redOne'+item.MarketId+select.SelectionId" />
<img src="img/downIng.png" style="width:0.2rem;display:none;" v-bind:id="'greenOne'+item.MarketId+select.SelectionId" />
</p>
</p>
</p>
<p class="downImg" onclick="clickImg()">
<img src="img/toDown.png" />
</p>
<!--下一进球-->
<p class="diffPlaysTetx" v-for="(item,index) in eventDetail.Market" v-if="item.RuleType==350">
<span class="speciesName">下一进球</span>
<span class="rotary" v-if="item.State!=1">(已封盘)</span>
<span class="speciesExp">猜90分钟(含补时)下一进球的球队</span>
</p>
<p id="nextgoal" v-for="(item,index) in eventDetail.Market" v-if="item.RuleType==350" name="selectionItems" class="result">
<p v-bind:class="[(select.BackOdds<1.01 || item.State!=1) ? 'resutitemGray commonBorderGray':'resutitem commonBorder']" v-for="(select,index) in item.Selection" v-on:click="select.BackOdds>=1.01 &&clickFun($event,item.State,select.BackOdds,item.MarketId,select.SelectionId,'下一进球',select.SelectionName)" name="itemSelection">
<p class="winEquLose" v-bind:name="'item'+item.MarketId" v-bind:id="'selectionname'+item.MarketId+select.SelectionId">{{select.SelectionName}}</p>
<p class="winEquLoseOdds" v-bind:name="'item'+item.MarketId">
<span v-bind:id="item.MarketId+select.SelectionId" v-bind:maxlimit="select.MaxStakeLimit">{{select.BackOdds}}</span>
<img src="img/upIng.png" style="width:0.2rem;display:none;" v-bind:id="'redOne'+item.MarketId+select.SelectionId" />
<img src="img/downIng.png" style="width:0.2rem;display:none;" v-bind:id="'greenOne'+item.MarketId+select.SelectionId" />
</p>
</p>
<p class="" style="width: 100%;height:0.45rem;"></p>
</p>
<p class="perchp" style="width: 100%;height:3rem;"></p>
</p>
</p>
<!--竞猜记录-->
<p class="downChangrTab guessRecord">
<p class="hide-body" id="dialogorders">
<p class="tableNameGuess">
<li>玩法</li>
<li>选项</li>
<li>赔率</li>
<li>本金</li>
<li>结果</li>
</p>
<ul style="background:#FFFFFF;height:4.79rem;overflow: scroll;">
<p class="guessedLists" id="contentOrders" v-for="(item,index) in orders">
<li>
{{item.MarketName}}
</li>
<li>
{{item.SelectionName}}
</li>
<li>
{{item.FillPrice}}
</li>
<li>
{{item.FillAmount}}
</li>
<li>
<p v-if="item.Status == '0'"> 待确认</p>
<p v-else-if="item.Status == '1'">订单正常</p>
<p v-else-if="item.Status == '2'">{{item.NetReturn}}</p>
<p v-else-if="item.Status == '3'">订单已被取消</p>
<p v-else-if="item.Status == '4'">订单无效</p>
<p v-else="item.Status == '5'">订单被拒绝，投注延迟期间发生重要事件等原因</p>
</li>
</p>
</ul>
</p>
</p>
<!--赛事事件-->
<p class="downChangrTab" style="display: none;" v-if="">
<p class="login-body" id="contentCases">
<table class="whatHappen" v-if="cases.length >0">
<tr>
<td></td>
<td class="happenedMiddle">
<p class="happenedMiddle_top" style="margin-top: 0.4rem;"></p>
</td>
<td></td>
</tr>
</table>
<table class="whatHappen" style="" v-for="(item,index) in cases" border="0" cellspacing="0" cellpadding="0">
<tr>
<td></td>
<td class="happenedMiddle">
<p class="happenedMiddle_line"></p>
</td>
<td></td>
</tr>
<tr v-if="item.CaseDescription.indexOf('主')>-1">
<td class="eventsHappendLeft_things">
<p class="eventsText">
<p class="eventsTextLeft_time">{{item.CaseMinutes}}'</p>
<p class="eventsTextLeft_Country">{{item.CaseDescription}}</p>
</p>
</td>
<td class="happenedMiddle">
<p class="eventsHappend_img">
<img :src="GetMatchEventImg(item.CaseDescription)" />
</p>
</td>
<td></td>
</tr>
<tr v-if="item.CaseDescription.indexOf('客')>-1">
<td></td>
<td class="happenedMiddle">
<p class="eventsHappend_img">
<img :src="GetMatchEventImg(item.CaseDescription)" />
</p>
</td>
<td class="eventsHappendRight_things">
<p class="eventsText">
<p class="eventsTextRight_Country">{{item.CaseDescription}}</p>
<p class="eventsTextRight_time">{{item.CaseMinutes}}'</p>
</p>
</td>
</tr>
<tr v-if="item.CaseDescription.indexOf('主')<0 && item.CaseDescription.indexOf('主')<0">
<td></td>
<td>
<a class="ti tlefoc">{{item.CaseMinutes}}'</a>
<a class="titlefoc">{{item.DesChina}}</a>
</td>
<td></td>
</tr>
</table>
<table class="whatHappen" v-if="cases.length >0">
<tr>
<td></td>
<td class="happenedMiddle">
<p class="happenedMiddle_line"></p>
<p class="happenedMiddle_top"></p>
</td>
<td></td>
</tr>
</table>
<!--<p style="width: 100%; height: 2.7rem;"></p>-->
</p>
</p>
<!--技术统计-->
<p class="downChangrTab" style="display: none;">
<p class="skillInfoGaryBg" id="stutsskillsData">
<p class="skillInfo" v-for="(item, index) in skillsData">
<li class="shotsOnTargets">
<p class="shotsOnTargets_left">
<p class="skillsTextFonts">{{item.AwayTeamValue}}</p>
<p class="sotl_bg">
<p class="sotl_bgProgress"></p>
</p>
</p>
<p class="shotsOnTargets_middle">
<img :src="GetMatchStatsImage(item.StatsType)" />
<p class="shills_name">{{item.StatsType}}</p>
</p>
<p class="shotsOnTargets_right">
<p class="skillsTextFonts">{{item.HomeTeamValue}}</p>
<p class="sotl_bg">
<p class="sotl_bgProgress"></p>
</p>
</p>
</li>
</p>
</p>
</p>
</p>
<!--底部下单-->
<p class="buttomOrder">
<!--金额输入-->
<!--竞猜金额-->
<p class="aboutMoney">
<input type="text" name="" id="betmoney" class="gussMoney" value="竞猜金额" placeholder="" readonly="readonly" v-model="gussMoney" />
<img src="img/clearBetMoney.png" class="clearGussMoney" id="clearGussMoney" />
<!--余额-->
<span class="balanceMoney" id="minemoney">我的余额：888</span>
<!--下注金额-->
<p class="diffGussMoney" style="text-align:center;">
<ul>
<li name="bettingmoney" class="difGuMonCom" val="100">+100</li>
<li name="bettingmoney" class="difGuMonCom" val="500">+500</li>
<li name="bettingmoney" class="difGuMonCom" val="1000">+1000</li>
<li class="difGuMonCom" id="allin" style="line-height: 0.5rem;">
<p style="height: 0.3rem;">All <span style="margin-left: 0.05rem;">in</span></p>
<p id="allinvalue" style="height: 0.3rem;">100</p>
</li>
</ul>
</p>
<!--确定-->
<p class="subSure subSureRed" style="text-align:center;" onclick="CreateOrder();" id="subSure">
确定
</p>
</p>
</p>
<!--下单成功后遮罩层-->
<p id="overlay" class="overlay"></p>
</p>
<p>
<img src="img/goal/goalball.png" />
<img src="img/goal/goal.png" />
<img src="img/goal/fireworks.png" />
</p>
<script src="js/jquery-1.10.2.min.js" type="text/javascript" charset="utf-8"></script>
<script src="js/vue.min.js" type="text/javascript" charset="utf-8"></script>
<script src="js/common.js?ver=012902" type="text/javascript" charset="utf-8"></script>
<script src="js/jquery.cookie.min.js"></script>
<script src="js/mask.js?ver=012901"></script>
<script type="text/javascript" src="js/eventDetailsNew.js?ver=012908"></script>
<script src="../js/animation.js"></script>
</body>
</html>Copier après la connexion
Recommandations associées :
Exemple d'implémentation JavaScript du flou d'image
Implémentation JavaScript de code d'algorithme de flou d'image Compétences Share_javascript
Comment résoudre le problème des images floues dessinées dans Canvas ?
Ce qui précède est le contenu détaillé de. pour plus d'informations, suivez d'autres articles connexes sur le site Web de PHP en chinois!
![[Web front-end] Démarrage rapide de Node.js](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
