Created
August 8, 2018 21:28
-
-
Save ENAML/a60332dfb86a2eb1ab1daabefdd282f8 to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
// run | |
const ctx = initCtx(); | |
const text = `hello my friends`; | |
draw({ size: 16, fontFace: `monospace` }, text, 10, 50); | |
// initialize canvas context | |
function initCtx(w = 600, h = 400) { | |
// create canvas & ctx | |
const canvas = document.createElement('canvas'); | |
document.body.appendChild(canvas); | |
const ctx = canvas.getContext('2d'); | |
// set size | |
const scale = window.devicePixelRatio || 1; | |
canvas.style.width = `${w}px`; | |
canvas.style.height = `${h}px`; | |
canvas.width = w * scale; | |
canvas.height = h * scale | |
// Normalize coordinate system to use css pixels. | |
ctx.scale(scale, scale); | |
return ctx; | |
} | |
// draw some _monospace_ characters / text | |
function draw({ size, fontFace }, text, xStart, yStart) { | |
ctx.font = `${size}px ${fontFace}`; | |
let x = xStart; | |
let y = yStart; | |
for (let c of text) { | |
const { width: w } = ctx.measureText(c); | |
// console.log( w ); | |
ctx.fillText(c, x, y); | |
x += w; | |
} | |
x = xStart; | |
y = yStart + size; | |
ctx.fillText(text, x, y); | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment