{"id":9398,"date":"2020-05-08T21:46:25","date_gmt":"2020-05-08T13:46:25","guid":{"rendered":"https:\/\/www.zhangxinxu.com\/wordpress\/?p=9398"},"modified":"2020-05-08T21:46:25","modified_gmt":"2020-05-08T13:46:25","slug":"css-mask-compress-png-image","status":"publish","type":"post","link":"https:\/\/www.zhangxinxu.com\/wordpress\/2020\/05\/css-mask-compress-png-image\/","title":{"rendered":"\u501f\u52a9CSS mask\u906e\u7f69\u663e\u8457\u4f18\u5316PNG\u56fe\u7247\u7684\u5c3a\u5bf8"},"content":{"rendered":"<p>by <a href=\"https:\/\/www.zhangxinxu.com\/\">zhangxinxu<\/a> from <a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=9398\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=9398<\/a><br \/>\n\u672c\u6587\u6b22\u8fce\u5206\u4eab\u4e0e\u805a\u5408\uff0c\u5168\u6587\u8f6c\u8f7d\u5c31\u4e0d\u5fc5\u4e86\uff0c\u5c0a\u91cd\u7248\u6743\uff0c\u5708\u5b50\u5c31\u8fd9\u4e48\u5927\uff0c\u82e5\u6025\u7528\u53ef\u4ee5\u8054\u7cfb\u6388\u6743\u3002<\/p>\n<p><script>window.wxShareImgUrl = 'https:\/\/www.zhangxinxu.com\/study\/image\/share\/202005-jpg-mask.jpg';<\/script><\/p>\n<h3>\u4e00\u3001\u65e0\u6cd5\u8fdb\u4e00\u6b65\u538b\u7f29\u7684PNG\u56fe\u7247<\/h3>\n<p>\u4f8b\u5982\u6709\u5982\u4e0b\u6240\u793a\u7684PNG\u56fe\u7247\uff08\u5c3a\u5bf81\/2\u663e\u793a\u4e86\uff09\uff0c\u4f7f\u7528\u9876\u7ea7\u7684PNG\u5de5\u5177\u538b\u7f29\u540e\u8fd8\u6709122K\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202005\/card.jpg\" width=\"202\" height=\"318\" alt=\"\u5361\u7247\u56fe\u7247\u793a\u610f\"><\/p>\n<p>\u539f\u56fe\u5730\u5740\u8fd9\u91cc\uff1a<a href=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202005\/card.png\" target=\"_blank\">https:\/\/image.zhangxinxu.com\/image\/blog\/202005\/card.png<\/a><\/p>\n<p>PNG\u5c3a\u5bf8\u5927\u5c0f\u793a\u610f\u5982\u4e0b\uff1a<br \/>\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202005\/2020-05-08_134442.png\" width=\"193\" height=\"154\" alt=\"PNG\u56fe\u7247\u5c3a\u5bf8\u793a\u610f\"><\/p>\n<p>\u5982\u679c\u9879\u76ee\u5c31\u4e00\u5f20\u8fd9\u6837\u7684\u56fe\u8fd8\u597d\uff0c\u8981\u662f\u9875\u9762\u4e00\u4e0b\u5b50\u6709\u5f88\u591a\u8fd9\u4e48\u4e2a\u5c3a\u5bf8\u7684PNG\uff0c\u90a3\u5bf9\u9996\u6b21\u52a0\u8f7d\u7684\u6027\u80fd\u5f71\u54cd\u5c31\u975e\u5e38\u660e\u663e\u4e86\uff0c\u4f8b\u5982\u4e0b\u56fe4\u5f20\u5361\u7247\u56fe\u5c31\u6709500K\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202005\/2020-05-08_134817.png\" width=\"393\" height=\"102\" alt=\"\u591a\u4e2a\u5361\u7247\u56fe\u5c3a\u5bf8\"><\/p>\n<p>\u7531\u4e8e\u5361\u7247\u7684\u80cc\u666f\u4e5f\u662f\u590d\u6742\u56fe\u5f62\uff0c\u8fb9\u8fb9\u89d2\u89d2\u5fc5\u987b\u8981\u900f\u660e\uff0c\u6539\u6210JPG\u683c\u5f0f\u80af\u5b9a\u4e0d\u884c\uff08\u8fb9\u89d2\u4f1a\u53d8\u6210\u7eaf\u8272\uff09\uff0c\u5c31\u6ca1\u6709\u4ec0\u4e48\u53ef\u4ee5\u8fdb\u4e00\u6b65\u4f18\u5316\u7684\u65b9\u6cd5\u5417\uff1f<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202005\/2020-05-08_135041.png\" width=\"136\" height=\"141\" alt=\"\u8fb9\u89d2\u9700\u8981\u900f\u660e\"><\/p>\n<p>\u6709\uff0c\u90a3\u5c31\u662f\u501f\u52a9CSS mask\u906e\u7f69\u663e\u8457\u4f18\u5316PNG\u56fe\u7247\u7684\u5c3a\u5bf8\u3002<\/p>\n<h3>\u4e8c\u3001mask-image\u4e0ePNG\u5c3a\u5bf8\u4f18\u5316<\/h3>\n<p><code>mask-image<\/code>\u906e\u7f69\u6709\u8fd9\u6837\u4e00\u4e2a\u529f\u80fd\uff0c\u53ea\u6709\u906e\u7f69\u56fe\u7247\u5b58\u5728\u7684\u533a\u57df\u624d\u663e\u793a\uff0c\u90a3\u5c82\u4e0d\u662f\u5982\u679c\u662f\u4e00\u4e2a\u8fb9\u89d2\u900f\u660e\u7684\u4efb\u610f\u906e\u7f69\u56fe\uff0c\u5c31\u53ef\u4ee5\u8ba9JPG\u56fe\u7247\u8fb9\u89d2\u7684\u767d\u8272\u900f\u660e\u4e86\u3002<\/p>\n<p>\u65b9\u6cd5\u53ef\u884c\uff0c<a href=\"https:\/\/www.zhangxinxu.com\/study\/202005\/png-compress-by-mask-demo.php\" rel=\"noopener\" target=\"_blank\">demo\u8fd9\u91cc<\/a>\u3002<\/p>\n<p>\u5177\u4f53\u505a\u6cd5\u5982\u4e0b\u3002<\/p>\n<h4>1. PNG\u8f6cJPG<\/h4>\n<p>\u5148\u628aPNG\u56fe\u7247\u4fdd\u6301\u6210JPG\uff0c\u56fe\u7247\u8d28\u91cf50%\u5c31\u8db3\u591f\u4e86\uff0c\u5982\u4e0b\u56fe\u6240\u793a\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202005\/card.jpg\" width=\"202\" height=\"318\" alt=\"\u5361\u7247\u56fe\u7247\u793a\u610f\"><\/p>\n<p>\u6b64\u65f6\uff0c\u56fe\u7247\u7684\u5c3a\u5bf8\u53ef\u4ee5\u51cf\u5c0f\u8d85\u8fc750%\uff01<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202005\/2020-05-08_135548.png\" width=\"188\" height=\"147\" alt=\"JPG\u56fe\u7247\u7684\u5c3a\u5bf8\"><\/p>\n<h4>2. \u6839\u636ePNG\u8f6e\u5ed3\u5236\u4f5c\u7eaf\u8272PNG<\/h4>\n<p>PNG\u56fe\u7247\u4e4b\u6240\u4ee5\u5c3a\u5bf8\u5927\uff0c\u5c31\u662f\u56e0\u4e3a\u8272\u5f69\u8fc7\u4e8e\u4e30\u5bcc\uff0c\u5982\u679c\u6211\u4eec\u53d8\u6210\u7eaf\u8272\uff0c\u5c3a\u5bf8\u53ef\u4ee5\u964d\u4f4e100\u500d\u4e0d\u6b62\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202005\/2020-05-08_135900.png\" width=\"231\" height=\"345\" alt=\"\u8f6e\u5ed3\u7eaf\u8272\u586b\u5145\"><\/p>\n<p>\u6b64\u65f6\u7684\u7eaf\u9ed1\u8272\u989c\u8272\u586b\u5145PNG\u56fe\u7247\u7684\u5c3a\u5bf8\u4e0d\u8db31K\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202005\/2020-05-08_140136.png\" width=\"194\" height=\"161\" alt=\"\u586b\u5145PNG\u56fe\u7247\u5c3a\u5bf8\"><\/p>\n<h4>3. \u4f7f\u7528\u906e\u7f69\u8ba9JPG\u8fb9\u89d2\u767d\u8272\u900f\u660e<\/h4>\n<p>\u5047\u8bbeJPG\u5361\u7247\u56fe\u4f7f\u7528\u7684\u662f<code>&lt;img&gt;<\/code>\u5143\u7d20\uff0cHTML\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n<pre>&lt;img src=\"card.jpg\"&gt;<\/pre>\n<p>\u4f7f\u7528\u5982\u4e0b\u7684CSS\u4ee3\u7801\uff1a<\/p>\n<pre>img {\r\n    -webkit-mask-image: url(card-mask.png);\r\n    mask-image: url(card-mask.png);\r\n}<\/pre>\n<p>\u5c31\u53ef\u4ee5\u6709\u548c\u539f\u59cb122K\u5927\u5c0fPNG\u56fe\u7247\u4e00\u6837\u7684\u6548\u679c\u7684\u4e86\uff0c\u8fb9\u89d2\u900f\u660e\uff0c\u5c3a\u5bf8\u8fd8\u5c0f\u3002<\/p>\n<p>\u56e0\u4e3acard-mask.png\u76844\u4e2a\u8fb9\u89d2\u662f\u900f\u660e\u7684\uff0c\u6240\u4ee5card.jpg\u5e94\u7528card-mask.png\u4f5c\u4e3a\u906e\u7f69\u56fe\u7247\u540e\uff0c\u8fb9\u89d2\u4e5f\u8ddf\u7740\u900f\u660e\u4e86\u3002<\/p>\n<h4>4. \u906e\u7f69\u56fe\u7247\u7684\u8de8\u57df\u9650\u5236<\/h4>\n<p>\u968f\u7740Chrome\u7b49\u6d4f\u89c8\u5668\u7684\u5b89\u5168\u5347\u7ea7\uff0c\u906e\u7f69\u56fe\u7247\u76ee\u524d\u6709\u8de8\u57df\u8bbf\u95ee\u9650\u5236\uff0c\u4f1a\u6709\u7c7b\u4f3c\u4e0b\u9762\u7684\u9519\u8bef\u63d0\u793a\uff1a<\/p>\n<blockquote><p>Access to image at &#8216;https:\/\/image.zhangxinxu.com\/&#8230;\/card-mask.png&#8217; from origin &#8216;https:\/\/www.zhangxinxu.com&#8217; has been blocked by CORS policy: No &#8216;Access-Control-Allow-Origin&#8217; header is present on the requested resource.<\/p><\/blockquote>\n<p>\u6211\u4eec\u53ef\u4ee5\u628a\u7eaf\u8272\u906e\u7f69\u56fe\u53d8\u6210base64\u683c\u5f0f\u7684\uff0c\u4f8b\u5982\uff1a<\/p>\n<pre>img {\r\n    -webkit-mask-image: url(data:image\/png;base64,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);\r\n}<\/pre>\n<hr>\n<p>\u773c\u89c1\u4e3a\u5b9e\uff0c\u60a8\u53ef\u4ee5\u72e0\u72e0\u5730\u70b9\u51fb\u8fd9\u91cc\uff1a<a href=\"https:\/\/www.zhangxinxu.com\/study\/202005\/png-compress-by-mask-demo.php\" rel=\"noopener\" target=\"_blank\">PNG\u56fe\u7247\u4f7f\u7528CSS\u906e\u7f69\u5c3a\u5bf8\u4f18\u5316demo<\/a><\/p>\n<p>JPG\u683c\u5f0f\u5361\u7247\u6700\u7ec8\u5b9e\u73b0\u6548\u679c\u5982\u4e0b\u56fe\u6240\u793a\uff08\u56db\u4e2a\u89d2\u900f\u660e\u4e86\uff09\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/blog\/202005\/2020-05-08_214502.jpg\" width=\"300\" height=\"405\" alt=\"\u5b9e\u73b0\u7684\u6548\u679c\u622a\u56fe\" class=\"alignnone size-medium\" \/><\/p>\n<h3>\u4e09\u3001\u4f18\u5316\u540e\u7684\u6548\u679c\u5bf9\u6bd4<\/h3>\n<p>\u4f18\u5316\u524d\u540e4\u5f20\u56fe\u5927\u5c0f\u5bf9\u6bd4\u5982\u4e0b\uff1a<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/image.zhangxinxu.com\/image\/blog\/202005\/2020-05-08_143203.png\" width=\"393\" height=\"199\" alt=\"\u56fe\u7247\u5927\u5c0f\u524d\u540e\u5bf9\u6bd4\"><\/p>\n<p>\u539f\u67654\u5f20\u56fe\u7247\u652f\u6301\u662f458K\uff0c\u4f18\u5316\u540e\u7684\u56fe\u7247\u5c3a\u5bf8\u662f197K+1K\uff0c\u5927\u5c0f\u51cf\u5c0f\u4e86<big>56.8%<\/big>\uff01<\/p>\n<p>\u9177\u513f~<\/p>\n<p><code>mask-image<\/code>\u8fd9\u79cd\u79fb\u52a8\u7aef\u5f88\u65e9\u5f88\u65e9\u5c31\u5df2\u7ecf\u652f\u6301\u4e86\uff0c\u8fd9\u91cc\u4f7f\u7528\u7684\u53c8\u662f\u4f20\u7edf\u8bed\u6cd5\uff0c\u5b8c\u5168\u6ca1\u6709\u4efb\u4f55\u517c\u5bb9\u6027\u95ee\u9898\uff0c\u5927\u5bb6\u53ef\u4ee5\u653e\u5fc3\u4f7f\u7528\u3002<\/p>\n<p>\u662f\u4e0d\u662f\u53c8\u5b66\u5230\u4e86\u4e00\u62db\uff1f<img loading=\"lazy\" decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/emtion\/emoji\/1f60e.svg\" width=\"20\" height=\"20\" align=\"absmiddle\"><\/p>\n<p>\u6b22\u8fce\u8f6c\u53d1\uff0c\u6b22\u8fce\u5206\u4eab\u3002<\/p>\n<p>\u672c\u6587\u4e3a\u539f\u521b\u6587\u7ae0\uff0c\u6b22\u8fce\u5206\u4eab\uff0c\u52ff\u5168\u6587\u8f6c\u8f7d\uff0c\u5982\u679c\u5b9e\u5728\u559c\u6b22\uff0c\u53ef\u6536\u85cf\uff0c\u6c38\u4e0d\u8fc7\u671f\uff0c\u4e14\u4f1a\u53ca\u65f6\u66f4\u65b0\u77e5\u8bc6\u70b9\u53ca\u4fee\u6b63\u9519\u8bef\uff0c\u9605\u8bfb\u4f53\u9a8c\u4e5f\u66f4\u597d\u3002<br \/>\n\u672c\u6587\u5730\u5740\uff1a<a href=\"https:\/\/www.zhangxinxu.com\/wordpress\/?p=9398\">https:\/\/www.zhangxinxu.com\/wordpress\/?p=9398<\/a><\/p>\n<p>\uff08\u672c\u7bc7\u5b8c\uff09<\/p>\n","protected":false},"excerpt":{"rendered":"<p><img decoding=\"async\" src=\"\/\/image.zhangxinxu.com\/image\/blog\/202005\/png-nmask-cover.jpg\" width=\"160\" height=\"102\" alt=\"\u906e\u7f69\u538b\u7f29PNG\u5c01\u9762\u56fe\" class=\"alignright size-medium\" loading=\"lazy\" \/><\/p>\n<p>\u5e26\u6709\u900f\u660e\u533a\u57df\uff0c\u540c\u65f6\u8272\u5f69\u4e30\u5bcc\u7684PNG\u56fe\u7247\u518d\u600e\u4e48\u538b\u7f29\u4f53\u79ef\u4e5f\u662f\u5f88\u5927\u7684\uff0c\u6709\u6ca1\u6709\u4ec0\u4e48\u529e\u6cd5\u65e2\u4fdd\u6301PNG\u56fe\u7247\u7684\u900f\u660e\uff0c\u53c8\u663e\u8457\u964d\u4f4e\u56fe\u7247\u7684\u5c3a\u5bf8\u5462\uff1f\u672c\u6587\u5c31\u5c06\u4ecb\u7ecd\u5982\u4f55\u4f7f\u7528CSS\u906e\u7f69\u964d\u4f4e\u8d85\u8fc750%\u5927\u5c0f\u7684PNG\u4f53\u79ef\uff0c\u4f18\u5316\u6027\u80fd\u3002<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[1271,771,1078,1183,10,443,1155,1612],"_links":{"self":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/9398"}],"collection":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/comments?post=9398"}],"version-history":[{"count":0,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/posts\/9398\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/media?parent=9398"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/categories?post=9398"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.zhangxinxu.com\/wordpress\/wp-json\/wp\/v2\/tags?post=9398"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}