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BTC Recursive Inscription - Canvas Assembler
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<!-- Inscription html file. "src" is an already inscribed `assembler.js` at https://ordinals.com/content/10215b3d07fd53c5a97fe701d7681e9b9049d9b369b85c19a206cee3747bdf19i0. data-height & data-width are the trait layer sizes. data-ids are trait inscription ids. --> | |
<script id="config" | |
src="/content/10215b3d07fd53c5a97fe701d7681e9b9049d9b369b85c19a206cee3747bdf19i0" | |
data-token-id="69420" | |
data-height="1460" | |
data-width="1000" | |
data-ids="756ef03122e4bc39cd867b2d8d06845bbd9ebae6a48e23e951593c0cf2f7a1bbi0,55c0aa11543bcd2c07932bf825f9cf4d46eeb4eae0633983b33919d33f10dda2i4,cd2cabfc0779d3ffd6fc91c0b3296dddf2ba24d1a720e844d9e094d44c11f5f1i3,ba29de2e0a5bcad7248d4ff0452fa868df237b1bdf79fb4f810427edbb7b8bf1i2,5a3c7e26305548a4c616b61d899ecc139ce64f68bfe41b085d94a97ca37d8df3i2,1785a69e69eb0a44c98a04293a066eaebdb9b884089d73d6efb01c7d1e101feci7,0200a772d01023e124d7bbd4c92585361e52443f25f22cd28ede0715efce2c2ci8,e549a342b57781b649cc99c9b77a65f319833b73106705829ea6378b9e088f48i3"> | |
</script> |
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function initialize() { | |
const tokenId = document.getElementById('config').getAttribute( | |
'data-token-id'); | |
const ids = document.getElementById('config').getAttribute('data-ids').split( | |
','); | |
const width = document.getElementById('config').getAttribute('data-height'); | |
const height = document.getElementById('config').getAttribute('data-width'); | |
const html = ` | |
<!DOCTYPE html> | |
<html lang="en"> | |
<head> | |
<meta charset="UTF-8" /> | |
<meta name="viewport" content="width=device-width, initial-scale=1.0" /> | |
<title>#${tokenId}</title> | |
<style> | |
body, html { | |
margin: 0; | |
padding: 0; | |
height: 100%; | |
width: 100%; | |
display: flex; | |
justify-content: center; | |
align-items: center; | |
} | |
</style> | |
</head> | |
<body> | |
<canvas id="canvas"></canvas> | |
</body> | |
</html>`; | |
document.documentElement.innerHTML = html; | |
const c = document.getElementById('canvas'), | |
t = c.getContext('2d'); | |
const aspectRatio = Number(width) / Number(height); | |
function resizeCanvas() { | |
const windowAspect = window.innerWidth / window.innerHeight; | |
if (windowAspect > aspectRatio) { | |
c.height = window.innerHeight; | |
c.width = c.height * aspectRatio; | |
} else { | |
c.width = window.innerWidth; | |
c.height = c.width / aspectRatio; | |
} | |
async function load(url) { | |
return new Promise((r, j) => { | |
const i = new Image(); | |
i.onload = () => r(i); | |
i.onerror = j; | |
i.src = url; | |
}); | |
} | |
async function render() { | |
(await Promise.all(ids.map(id => load('/content/' + id)))).forEach(i => | |
t.drawImage(i, 0, 0, c.width, c.height)); | |
} | |
render(); | |
} | |
window.addEventListener('resize', resizeCanvas); | |
resizeCanvas(); | |
} | |
window.onload = function() { | |
initialize(); | |
} |
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