{"id":431036,"date":"2021-04-18T14:14:47","date_gmt":"2021-04-18T06:14:47","guid":{"rendered":"http:\/\/4563.org\/?p=431036"},"modified":"2021-04-18T14:14:47","modified_gmt":"2021-04-18T06:14:47","slug":"canvas-%e4%bd%bf%e7%94%a8-affine%e5%ae%9e%e7%8e%b0%e4%bb%bb%e6%84%8f%e7%82%b9%e5%8f%98%e6%8d%a2%e6%97%8b%e8%bd%ac%e4%bd%8d%e7%a7%bb%e7%bc%a9%e6%94%be","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=431036","title":{"rendered":"canvas \u4f7f\u7528 Affine,\u5b9e\u73b0\u4efb\u610f\u70b9\u53d8\u6362(\u65cb\u8f6c,\u4f4d\u79fb,\u7f29\u653e"},"content":{"rendered":"<div>\n<div>\n<div>\n<h1>                  canvas \u4f7f\u7528 Affine,\u5b9e\u73b0\u4efb\u610f\u70b9\u53d8\u6362(\u65cb\u8f6c,\u4f4d\u79fb,\u7f29\u653e               <\/h1>\n<p> <\/p>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : zoule <\/span>  <span><i><\/i> 7<\/span> <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div isfirst=\"1\"> <\/p>\n<h2>\u77e9\u9635\u5165\u95e8\u6559\u7a0b\u53ca\u6587\u4ef6\u83b7\u53d6\u5730\u5740<\/h2>\n<p>http:\/\/www.seeshiontech.com\/docs\/page_145.html<\/p>\n<p>1.\u9996\u5148\u6211\u4eec\u521b\u5efa canvas \u6807\u7b7e,\u4e3a\u4e86\u65b9\u4fbf\u67e5\u770b\u6548\u679c,\u6211\u4eec\u4e3a canvas \u6dfb\u52a0\u4e00\u4e0b\u6837\u5f0f,\u8fd9\u91cc\u56fe\u7247\u6211\u4f7f\u7528\u7684\u662f 1920*1080 \u7684\u5c3a\u5bf8<\/p>\n<pre><code>&lt;canvas id=\"canvas\" width=\"1920\" height=\"1080\"&gt;&lt;\/canvas&gt; <\/code><\/pre>\n<pre><code> canvas {             display: block;             border: 1px solid;             width: 480px;             height: 270px;             margin: 100px auto;         } <\/code><\/pre>\n<pre><code> \/\/\u4e0d\u505a\u5904\u7406 \u5c06\u56fe\u7247\u7ed8\u5236\u5230\u753b\u5e03  let image = document.createElement(\"img\");         let context = canvas.getContext(\"2d\");         image.src = \"http:\/\/static.atvideo.cc\/veleap\/templateDemo\/2021\/04\/06\/16\/30aawseyhgae.png\";         image.onload = function () {             context.drawImage(                 image,                 0,                 0,             );         } <\/code><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" referrerpolicy=\"no-referrer\" rel=\"noreferrer\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2021\/04\/20210418_607cb0bd6e67b.png\" alt=\"canvas \u4f7f\u7528 Affine,\u5b9e\u73b0\u4efb\u610f\u70b9\u53d8\u6362(\u65cb\u8f6c,\u4f4d\u79fb,\u7f29\u653e\" \/><\/p>\n<p>2.\u5f15\u5165 Affine.js \u6587\u4ef6<\/p>\n<pre><code>&lt;script src=\".\/lib\/Affine.js\"&gt;&lt;\/script&gt; <\/code><\/pre>\n<p>3.\u4f7f\u7528\u77e9\u9635\u4e2d\u5fc3\u70b9\u65cb\u8f6c\u7f29\u653e<\/p>\n<pre><code> let image = document.createElement(\"img\");         let context = canvas.getContext(\"2d\");         image.src = \"http:\/\/static.atvideo.cc\/veleap\/templateDemo\/2021\/04\/06\/16\/30aawseyhgae.png\";         image.onload = function () {             const imageWidth = image.width,                 imageHeight = image.height,                 centerPointX = imageWidth \/ 2,                 centerPointY = imageHeight \/ 2;             let a = {                 x: centerPointX,                 y: centerPointY,             },                 p = {                     x: centerPointX,                     y: centerPointY,                 },                 s = {                     x: 0.5,                     y: 0.5,                 },                 r = 45;              let matrix = new Affine();             matrix.set(a, p, s, r);             context.setTransform(matrix.mA, matrix.mB, matrix.mC, matrix.mD, matrix.mE, matrix.mF);             context.drawImage(                 image,                 0,                 0,             );         } <\/code><\/pre>\n<p><img decoding=\"async\" loading=\"lazy\" referrerpolicy=\"no-referrer\" rel=\"noreferrer\" src=\"http:\/\/4563.org\/wp-content\/uploads\/2021\/04\/20210418_607cb0c5474a2.png\" alt=\"canvas \u4f7f\u7528 Affine,\u5b9e\u73b0\u4efb\u610f\u70b9\u53d8\u6362(\u65cb\u8f6c,\u4f4d\u79fb,\u7f29\u653e\" \/><\/p>\n<\/p><\/div>\n<div> <b>\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (<span>0<\/span>)        <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<ul>\n<li>\n","protected":false},"excerpt":{"rendered":"<p>canvas \u4f7f\u7528 Affine,&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/431036"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=431036"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/431036\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=431036"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=431036"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=431036"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}