Created
March 25, 2022 11:05
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Japanese character test
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<!doctype html> | |
<html> | |
<head></head> | |
<body> | |
<canvas width="1080" height="1920"></canvas> | |
<script> | |
const blocks = [ | |
[0x2e80, 0x2eff], | |
[0x2f00, 0x2fdf], | |
[0x3000, 0x303f], | |
[0x3040, 0x309f], | |
[0x30a0, 0x30ff], | |
[0x31f0, 0x31ff], | |
[0x3200, 0x32ff], | |
[0x3300, 0x33ff], | |
[0x3400, 0x4dbf], | |
[0x4e00, 0x9fff], | |
[0xf900, 0xfaff], | |
[0xff00, 0xffef], | |
[0x16fe0, 0x16fff], | |
[0x1aff0, 0x1afff], | |
[0x1b000, 0x1b0ff], | |
[0x1b100, 0x1b12f], | |
[0x1b130, 0x1b16f], | |
[0x1f200, 0x1f2ff], | |
[0x20000, 0x2a6df], | |
[0x2a700, 0x2b73f], | |
[0x2b740, 0x2b81f], | |
[0x2b820, 0x2ceaf], | |
[0x2ceb0, 0x2ebef], | |
[0x2f800, 0x2fa1f], | |
[0x30000, 0x3134f], | |
]; | |
function * japaneseCodePoints() { | |
for (const [from, to] of blocks) { | |
for (let i = from; i <= to; i++) { | |
yield i; | |
} | |
} | |
} | |
async function main() { | |
const ctx = document.querySelector('canvas').getContext('2d'); | |
const { width, height } = ctx.canvas; | |
ctx.font = '16px -apple-system, BlinkMacSystemFont, sans-serif'; | |
let x = Infinity; | |
let y = Infinity; | |
for (const cp1 of japaneseCodePoints()) { | |
for (const cp2 of japaneseCodePoints()) { | |
const s = String.fromCodePoint(cp1, cp2); | |
const box = ctx.measureText(s); | |
if (x + box.width > width) { | |
x = 0; | |
y += 10; | |
} | |
if (y > height) { | |
y = 8; | |
console.log(cp1, cp2); | |
await new Promise(r => requestAnimationFrame(r)); | |
ctx.clearRect(0, 0, width, height); | |
} | |
ctx.fillText(s, x, y); | |
x += box.width; | |
} | |
} | |
} | |
main(); | |
</script> | |
</body> | |
</html> |
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