231495 2021-10-10 20:30:52 -0700 On iOS 15, when the canvas font is set to -apple-system, calling fillText with Chinese characters would cause the whole canvas area to blank. 2021-10-11 09:42:08 -0700 1 1 1 Unclassified WebKit Canvas Safari 15 iPhone / iPad Unspecified RESOLVED DUPLICATE 230187 HTML5 P2 Blocker --- 1 luonan.666 webkit-unassigned dino mmaxfield simon.fraser wenson_hsieh oldest_to_newest 1802510 0 440751 luonan.666 2021-10-10 20:30:52 -0700 Created attachment 440751 render blank demo On iOS 15, when the canvas font is set to -apple-system, calling fillText with Chinese characters would cause the whole canvas area to blank. first, set ctx.font = '28px -apple-system'; and then, draw some chinese, ctx.fillText('你好', 10, 50); then the whole canvas area becomes blank. but English letters could render correctly. Just change the font-family to 'Arial', everything works fine. 1802648 1 ap 2021-10-11 09:20:45 -0700 I cannot reproduce this with OS 15.1 beta. I think that it was a known issue, but cannot find the bug to dupe to. 1802657 2 wenson_hsieh 2021-10-11 09:42:08 -0700 Likely, 230187. *** This bug has been marked as a duplicate of bug 230187 *** 440751 2021-10-10 20:30:52 -0700 2021-10-10 20:30:52 -0700 render blank demo canvasfont.html text/html 511 luonan.666 PCFET0NUWVBFIGh0bWw+CjxodG1sIGxhbmc9ImVuIj4KPGhlYWQ+CiAgICA8bWV0YSBjaGFyc2V0 PSJVVEYtOCI+CiAgICA8bWV0YSBodHRwLWVxdWl2PSJYLVVBLUNvbXBhdGlibGUiIGNvbnRlbnQ9 IklFPWVkZ2UiPgogICAgPG1ldGEgbmFtZT0idmlld3BvcnQiIGNvbnRlbnQ9IndpZHRoPWRldmlj ZS13aWR0aCwgaW5pdGlhbC1zY2FsZT0xLjAiPgogICAgPHRpdGxlPkRvY3VtZW50PC90aXRsZT4K PC9oZWFkPgo8Ym9keT4KICAgIDxjYW52YXMgaWQ9ImNhbnZhcyI+PC9jYW52YXM+CiAgICA8c2Ny aXB0PgogICAgICAgIGNvbnN0IGNhbnZhcyA9IGRvY3VtZW50LmdldEVsZW1lbnRCeUlkKCJjYW52 YXMiKTsKICAgICAgICB2YXIgY3R4ID0gY2FudmFzLmdldENvbnRleHQoJzJkJyk7CiAgICAgICAg Y3R4LmZvbnQgPSAnMjhweCAtYXBwbGUtc3lzdGVtJzsKICAgICAgICBjdHguZmlsbFRleHQoJ+S9 oOWlvScsIDEwLCA1MCk7ICAgICAgICAKCgogICAgPC9zY3JpcHQ+CjwvYm9keT4KPC9odG1sPg==