{"id":3300,"date":"2025-06-06T12:00:20","date_gmt":"2025-06-06T04:00:20","guid":{"rendered":"https:\/\/www.wunen.com\/index.php\/2025\/06\/06\/%ef%bc%8820%ef%bc%89html5-%e5%a4%9a%e5%aa%92%e4%bd%93%e5%bd%b1%e9%9f%b3%e6%92%ad%e6%94%be\/"},"modified":"2025-06-06T12:00:20","modified_gmt":"2025-06-06T04:00:20","slug":"%ef%bc%8820%ef%bc%89html5-%e5%a4%9a%e5%aa%92%e4%bd%93%e5%bd%b1%e9%9f%b3%e6%92%ad%e6%94%be","status":"publish","type":"post","link":"http:\/\/www.wunen.com\/index.php\/2025\/06\/06\/%ef%bc%8820%ef%bc%89html5-%e5%a4%9a%e5%aa%92%e4%bd%93%e5%bd%b1%e9%9f%b3%e6%92%ad%e6%94%be\/","title":{"rendered":"\uff0820\uff09HTML5-\u591a\u5a92\u4f53\u5f71\u97f3\u64ad\u653e"},"content":{"rendered":"<div class=\"article_content clearfix\" id=\"article_content\">\n <link href=\"https:\/\/csdnimg.cn\/release\/blogv2\/dist\/mdeditor\/css\/editerView\/kdoc_html_views-1a98987dfd.css\" rel=\"stylesheet\"\/>\n <link 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\/>\n   <\/span>\n  <\/p>\n<p>\n   <span style=\"font-size:18px\"><br \/>\n    {drawImage}<br \/>\n   <\/span>\n  <\/p>\n<p>\n   <span style=\"font-size:18px\"><br \/>\n    \u753b\u5e03canvas\u5982\u4f55\u4e0e\u89c6\u9891video\u6807\u7b7e\u7ed3\u5408\uff0c\u8fbe\u5230\u5236\u4f5c\u5404\u79cd\u89c6\u9891\u529f\u80fd\u7684\u6548\u679c\u5462\uff1f\u5176\u79d8\u8bc0\u5728\u4e8e\u901a\u8fc7\u753b\u5e03\u91cd\u65b0\u63cf\u7ed8\u4e00\u6b21\u89c6\u9891\u7684\u5185\u5bb9\uff0c\u5c06\u89c6\u9891\u7684\u6bcf\u4e2a\u753b\u9762\u90fd\u8f6c\u6362\u6210\u753b\u5e03\u7684\u56fe\u50cf\uff0c\u8fd9\u6837\u5c31\u53ef\u4ee5\u901a\u8fc7javascript\u8bed\u8a00\u6240\u63d0\u4f9b\u7684\u56fe\u50cf\u63a7\u5236\u65b9\u6cd5\u6765\u64cd\u63a7\u5b83\u4eec\u3002\u6240\u4ee5\u70ab\u9177\u64ad\u653e\u5668\u6240\u4f7f\u7528\u7684\u89c6\u9891\u529f\u80fd\uff0c\u5e76\u4e0d\u9488\u5bf9video\uff0c\u800c\u662f\u9488\u5bf9\u63cf\u7ed8\u51fa\u5f71\u50cf\u7684canvas\u3002<br \/>\n   <\/span>\n  <\/p>\n<p>\n   <span style=\"font-size:18px\"><br \/>\n    \u80fd\u591f\u63cf\u7ed8\u5f71\u50cf\u5230\u753b\u5e03\u4e2d\u7684\u65b9\u6cd5\u662f\u201cdrawImage&#8221;\uff0c\u6b64\u65b9\u6cd5\u5141\u8bb8\u5728canvas\u4e2d\u63d2\u5165\u753b\u5e03\uff08canvas\uff09\uff0c\u56fe\u50cf\uff08img\uff09\u548c\u89c6\u9891\uff08video\uff09\u7b49\u5143\u7d20\u3002drawImage\u65b9\u6cd5\u6709\u4e09\u79cd\uff1a<br \/>\n   <\/span>\n  <\/p>\n<p>\n   <span style=\"font-size:18px\"><br \/>\n    drawImage\uff08image\uff0cdx\uff0cdy\uff09\/\/\u539f\u6bd4\u4f8b\u7ed8\u5236\u56fe\u50cf<br \/>\n   <\/span>\n  <\/p>\n<p>\n   <span style=\"font-size:18px\"><br \/>\n    drawImage\uff08image\uff0cdx\uff0cdy\uff0cdw\uff0cdh\uff09\/\/\u6309\u8bbe\u7f6e\u957f\u5bbd\u7ed8\u5236\u56fe\u50cf<br \/>\n   <\/span>\n  <\/p>\n<p>\n   <span style=\"font-size:18px\"><br \/>\n    drawImage\uff08image\uff0csx\uff0csy\uff0csw\uff0csh\uff0cdx\uff0cdy\uff0cdw\uff0cdh\uff09\/\/\u88c1\u5207\u540e\u7ed8\u5236\u56fe\u50cf<br \/>\n   <\/span>\n  <\/p>\n<p>\n   <span style=\"font-size:18px\"><br \/>\n    <br \/>\n   <\/span>\n  <\/p>\n<p>\n   <span style=\"font-size:18px\"><br \/>\n   <\/span>\n  <\/p>\n<p>\n   <span style=\"font-size:18px\"><br \/>\n    <br \/>\n   <\/span>\n  <\/p>\n<p>\n   <span style=\"font-size:18px\"><br \/>\n   <\/span>\n  <\/p>\n<p>\n   <span style=\"font-size:18px\"><br \/>\n   <\/span>\n  <\/p>\n<pre><code class=\"language-html\">&lt;html&gt;\n &lt;head&gt;\n     &lt;meta charset=\"utf-8\"\/&gt;\n     &lt;style&gt;\n        canvas{\n            border:1px solid black;\n        }\n     &lt;\/style&gt;\n   \n     &lt;script &gt;\n        function draw(){\n            var imgx = new Image();\n            imgx.src = 'img\/gophers-Slice_Scoreboard.png';\n            imgx.onload = function(){\n                var canvas = document.getElementById('myCanvas');\n                var context = canvas.getContext('2d');\n                context.drawImage(this,20,20,75,75);\n            }\n        }\n    &lt;\/script&gt;\n &lt;\/head&gt;\n &lt;body \u03bfnl\u03bfad=\"draw()\"&gt;\n    &lt;p&gt;Image:&lt;\/p&gt;\n    &lt;img id=\"pic\"src=\"img\/gophers-Slice_Scoreboard.png\" alt=\"pic\" width=\"50\" height=\"50\"&gt;\n    &lt;p&gt;Canvas:&lt;\/p&gt;\n    &lt;canvas id=\"myCanvas\" style=\"border:1px solid;\"&gt;\n    &lt;\/canvas&gt;\n &lt;\/body&gt;\n&lt;\/html&gt;\n<\/code><\/pre>\n<\/p>\n<p>\n   <span style=\"font-size:18px\"><br \/>\n    \u7b80\u5355\u5730\u901a\u8fc7drawImage\u63cf\u7ed8\u56fe\u50cf\u4e5f\u8bb8\u770b\u4e0d\u51fa\u6765canvas\u7684\u5f3a\u5927\uff0c\u5176\u5b9e\u771f\u6b63\u7cbe\u5f69\u7684\u662f\u53ef\u4ee5\u901a\u8fc7\u753b\u5e03\u4e0a\u63cf\u7ed8\u7684\u7ed3\u679c\u52a0\u5165javascript\u8bed\u53e5\u6765\u5b9e\u73b0\u7684\u7279\u6548\u6548\u679c\u6216\u529f\u80fd\u3002<br \/>\n   <\/span>\n  <\/p>\n<p>\n   <span style=\"font-size:18px\"><br \/>\n    \u63a5\u4e0b\u6765\u793a\u8303\u5982\u4f55\u7528javascript\u6307\u4ee4\u52a8\u6001\u8c03\u6574\u89c6\u9891\u64ad\u653e\u5668\u7684\u5927\u5c0f\u3002<br \/>\n   <\/span>\n  <\/p>\n<p>\n   <span style=\"font-size:18px\"><br \/>\n   <\/span>\n  <\/p>\n<pre><code class=\"language-html\">&lt;html&gt;\n &lt;head&gt;\n     &lt;meta charset=\"utf-8\"\/&gt;\n     &lt;style&gt;\n     &lt;\/style&gt;\n   \n     &lt;script &gt;\n       function eventWindowLoaded(){\n        var videoElement=document.getElementById(\"theVideo\");\n        var widthtoHeightRatio=videoElement.width\/videoElement.height;\n        var sizeElement=document.getElementById(\"videoSize\");\n        sizeElement.addEventListener('change',videoSizeChanged,false);\n        function videoChanged(e){\n            var target=e.target;\n            var videoElement=document.getElementById(\"theVideo\");\n            videoElement.width=target.value;\n            videoElement.height=target.value\/widthtoHeightRatio;\n        }\n     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[&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":215,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"class_list":["post-3300","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-11"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\uff0820\uff09HTML5-\u591a\u5a92\u4f53\u5f71\u97f3\u64ad\u653e - \u7269\u5ae9\u8f6f\u4ef6\u8d44\u8baf\u7f51<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"http:\/\/www.wunen.com\/index.php\/2025\/06\/06\/\uff0820\uff09html5-\u591a\u5a92\u4f53\u5f71\u97f3\u64ad\u653e\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" 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