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12345678910111213141516171819202122232425262728293031323334353637// Visualize Buffer by Dominic Tarr https://github.com/dominictarr/visualize-buffer
export function vb (b, width) { width = width || 256 var canvas = document.createElement('canvas')
canvas.height = width canvas.width = width
var ctx = canvas.getContext('2d')
var blocks = Math.ceil(Math.sqrt(b.length*2))
var B = Math.ceil(width/blocks) function rect(i, color) { var x = i % blocks var y = ~~(i / blocks) if(color < 12) ctx.fillStyle = 'hsl('+(color/12)*360 + ',100%,50%)' else { ctx.fillStyle = 'hsl(0,0%,'+~~(((color-12)/3)*100)+'%' } ctx.fillRect(x*B, y*B, B, B) }
for(var i = 0; i < b.length; i++) { rect(2*i, b[i] >> 4 & 15) rect(2*i + 1, b[i] & 15) }
var img = document.createElement('img') img.src = canvas.toDataURL() return img}