Created
August 28, 2024 04:07
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The complete source code for how to export emoji image rendered by specific font files.
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<!DOCTYPE html> | |
<html lang='en' class='notranslate' translate='no'> | |
<head> | |
<meta name='google' content='notranslate' /> | |
<meta http-equiv='Content-Language' content='en' /> | |
<meta charset='UTF-8'> | |
<style> | |
body { | |
padding: 5% 15%; | |
} | |
.emoji { | |
font-family:Segoe UI Emoji !important; | |
} | |
@font-face { | |
font-family: EmojiFontWin8; | |
src: url(css/fonts/seguiemj-win8.ttf); | |
} | |
.EmojiFontWin8 { | |
font-family:EmojiFontWin8 !important; | |
} | |
</style> | |
</head> | |
<body> | |
<noscript>You need to enable JavaScript to run this app.</noscript> | |
<script> | |
var emojiClass='EmojiFontWin8'; // default CSS class | |
var icon = '😀'; | |
var _scale=window.devicePixelRatio*2; | |
var w=96, h=96, fontSize,canvas,ctx,_x,_y,faviconTag; | |
canvas=document.createElement('canvas'); | |
document.body.appendChild(canvas); | |
canvas.width=w; | |
canvas.height=h; | |
fontSize = h/_scale; | |
canvas['style']['margin']='1px auto'; | |
canvas['style']['width']=`${w/_scale}px`; | |
canvas['style']['height']=`${h/_scale}px`; | |
var ctx=canvas.getContext('2d'); | |
ctx.scale(_scale,_scale); | |
ctx.font = `${fontSize}px ${ (emojiClass=='emoji') ? 'Segoe UI Emoji' : emojiClass }`; | |
ctx.textAlign = 'center'; | |
ctx.textBaseline='middle'; | |
ctx.direction='ltr'; | |
ctx.globalAlpha=1.0; | |
ctx.fontVariantCaps='unicase'; | |
ctx.fontKerning='auto'; | |
ctx.fontStretch='normal'; | |
ctx.filter='none'; | |
ctx.globalCompositeOperation='source-over'; | |
ctx.imageSmoothingEnabled=true; | |
ctx.imageSmoothingQuality='high'; | |
ctx.lineCap='butt'; | |
ctx.lineDashOffset=0; | |
ctx.lineJoin='miter'; | |
ctx.miterLimit=10; | |
ctx.shadowBlur=0; | |
ctx.shadowColor='rgba(0, 0, 0, 0)'; | |
ctx.shadowOffsetX=0; | |
ctx.shadowOffsetY=0; | |
ctx.textRendering='auto'; | |
_x=((canvas.width/_scale)/2); | |
_y=((canvas.height/_scale)/2); | |
ctx.fillText(icon, _x, _y); | |
const inputIcon = document.createElement('input'); | |
inputIcon.value=icon; | |
document.body.appendChild(inputIcon); | |
inputIcon.addEventListener('input', (evt)=> { | |
icon=evt.target.value; | |
canvas.getContext('2d').clearRect(0, 0,canvas.width,canvas.height); | |
canvas.getContext('2d').fillText(icon, _x, _y); | |
}); | |
function triggerEvent(el, type) { | |
let e = (('createEvent' in document) ? document.createEvent('HTMLEvents') : document.createEventObject()); | |
if ('createEvent' in document) { | |
e.initEvent(type, false, true); | |
el.dispatchEvent(e); | |
} else { | |
e.eventType = type; | |
el.fireEvent('on' + e.eventType, e); | |
} | |
} | |
(async()=> { | |
await new Promise((resolve, reject) => setTimeout(resolve, 500)); | |
triggerEvent(inputIcon,'input'); | |
})(); | |
</script> | |
</body> | |
</html> |
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