{"id":27266,"date":"2024-11-24T11:24:48","date_gmt":"2024-11-24T03:24:48","guid":{"rendered":"https:\/\/fwq.ai\/blog\/27266\/"},"modified":"2024-11-24T11:24:48","modified_gmt":"2024-11-24T03:24:48","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8-canvas-api-%e5%ae%9e%e7%8e%b0%e5%9b%be%e7%89%87%e6%9b%b2%e7%ba%bf%e6%8b%89%e4%bc%b8%e6%8e%92%e5%88%97%e5%b8%83%e5%b1%80%ef%bc%9f-2","status":"publish","type":"post","link":"https:\/\/fwq.ai\/blog\/27266\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528 Canvas API \u5b9e\u73b0\u56fe\u7247\u66f2\u7ebf\u62c9\u4f38\u6392\u5217\u5e03\u5c40\uff1f"},"content":{"rendered":"

\"\u5982\u4f55\u4f7f\u7528<\/p>\n

\u56fe\u7247\u66f2\u7ebf\u62c9\u4f38\u5e03\u5c40<\/strong><\/p>\n

\u5982\u4f55\u4f7f\u7528 html \u548c \u5b9e\u73b0\u56fe\u7247\u6309\u66f2\u7ebf\u62c9\u4f38\u5e76\u6392\u5217\u5e03\u5c40\uff1f\u5bf9\u4e8e\u521d\u5b66\u8005\u6765\u8bf4\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5e26\u6765\u4e00\u4e9b\u6311\u6218\u3002<\/p>\n

\u95ee\u9898\u63d0\u51fa\u8005\u63d0\u5230\u5c1d\u8bd5\u4e86 css3 \u7684 transform: rotatey \u5c5e\u6027\uff0c\u4f46\u66f2\u7ebf\u4e0d\u591f\u4e1d\u6ed1\uff0c\u4e14\u65e0\u6cd5\u5904\u7406\u4e2d\u95f4\u884c\u3002\u5bf9\u6b64\uff0c\u63d0\u51fa\u4e86\u4e00\u4e2a\u53ef\u80fd\u7684\u89e3\u51b3\u65b9\u6848\uff1acanvas api\u3002<\/p>\n

canvas api \u63d0\u4f9b\u4e86\u56fe\u50cf\u6570\u636e\u76f8\u5173\u7684\u529f\u80fd\uff0c\u53ef\u4ee5\u901a\u8fc7\u64cd\u4f5c\u50cf\u7d20\u70b9\u7684\u989c\u8272\u6765\u63a7\u5236\u56fe\u7247\u7684\u5c55\u73b0\u65b9\u5f0f\u3002\u4e00\u4e2a\u4f7f\u7528 canvas api \u5b9e\u73b0\u66f2\u7ebf\u62c9\u4f38\u6392\u5217\u5e03\u5c40\u7684\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n

let ctx = canvas.getContext(\"2d\");\nlet imageData = ctx.getImageData(0, 0, canvas.width, canvas.height);\nlet pixelArray = imageData.data;\n\n\/\/ \u5bf9\u50cf\u7d20\u70b9\u989c\u8272\u8fdb\u884c\u64cd\u4f5c\nfor (let x = 0; x < canvas.width; x++) {\n  let y = Math.sin(x \/ canvas.width * Math.PI) * canvas.height \/ 2 + canvas.height \/ 2;\n  let index = (x + y * canvas.width) * 4;\n\n  \/\/ \u8bbe\u5b9a\u50cf\u7d20\u70b9\u7684\u65b0\u989c\u8272\n  pixelArray[index] = 255; \/\/ \u7ea2\u8272\n  pixelArray[index + 1] = 128; \/\/ \u7eff\u8272\n  pixelArray[index + 2] = 0; \/\/ \u84dd\u8272\n}\n\n\/\/ \u5c06\u64cd\u4f5c\u540e\u7684\u50cf\u7d20\u6570\u636e\u653e\u56de\u753b\u5e03\nctx.putImageData(imageData, 0, 0);<\/pre>\n
 \u767b\u5f55\u540e\u590d\u5236 <\/p>\n
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\u4ee5\u4e0a\u5c31\u662f\u5982\u4f55\u4f7f\u7528 Canvas API \u5b9e\u73b0\u56fe\u7247\u66f2\u7ebf\u62c9\u4f38\u5e03\u5c40\uff1f\u7684\u8be6\u7ec6\u5185\u5bb9\uff0c\u66f4\u591a\u8bf7\u5173\u6ce8\u7c73\u4e91\u5176\u5b83\u76f8\u5173\u6587\u7ae0\uff01<\/p>\n","protected":false},"excerpt":{"rendered":"
\u56fe\u7247\u66f2\u7ebf\u62c9\u4f38\u5e03\u5c40 \u5982\u4f55\u4f7f\u7528 html \u548c \u5b9e\u73b0\u56fe\u7247\u6309\u66f2\u7ebf\u62c9\u4f38\u5e76\u6392\u5217\u5e03\u5c40\uff1f\u5bf9\u4e8e\u521d\u5b66\u8005\u6765\u8bf4\uff0c\u8fd9\u53ef\u80fd\u4f1a\u5e26\u6765\u4e00\u4e9b\u6311\u6218\u3002 \u95ee\u9898\u63d0\u51fa\u8005\u63d0\u5230\u5c1d\u8bd5\u4e86 css3 \u7684 transform: rotatey \u5c5e\u6027\uff0c\u4f46\u66f2\u7ebf\u4e0d\u591f\u4e1d\u6ed1\uff0c\u4e14\u65e0\u6cd5\u5904\u7406\u4e2d\u95f4\u884c\u3002\u5bf9\u6b64\uff0c\u63d0\u51fa\u4e86\u4e00\u4e2a\u53ef\u80fd\u7684\u89e3\u51b3\u65b9\u6848\uff1acanvas api\u3002 canvas api \u63d0\u4f9b\u4e86\u56fe\u50cf\u6570\u636e\u76f8\u5173\u7684\u529f\u80fd\uff0c\u53ef\u4ee5\u901a\u8fc7\u64cd\u4f5c\u50cf\u7d20\u70b9\u7684\u989c\u8272\u6765\u63a7\u5236\u56fe\u7247\u7684\u5c55\u73b0\u65b9\u5f0f\u3002\u4e00\u4e2a\u4f7f\u7528 canvas api \u5b9e\u73b0\u66f2\u7ebf\u62c9\u4f38\u6392\u5217\u5e03\u5c40\u7684\u793a\u4f8b\u4ee3\u7801\u5982\u4e0b\uff1a let ctx = canvas.getContext(“2d”); let imageData = ctx.getImageData(0, 0, canvas.width, canvas.height); let pixelArray = imageData.data; \/\/ \u5bf9\u50cf\u7d20\u70b9\u989c\u8272\u8fdb\u884c\u64cd\u4f5c for (let x = 0; x < canvas.width; x++) { let y = Math.sin(x \/ canvas.width * Math.PI) * canvas.height […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16],"tags":[],"class_list":["post-27266","post","type-post","status-publish","format-standard","hentry","category-16"],"_links":{"self":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/27266","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/comments?post=27266"}],"version-history":[{"count":0,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/posts\/27266\/revisions"}],"wp:attachment":[{"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/media?parent=27266"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/categories?post=27266"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/fwq.ai\/blog\/wp-json\/wp\/v2\/tags?post=27266"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}