Change label proportions

js/index.js

@@ -9,7 +9,11 @@ document.addEventListener('DOMContentLoaded', () => {
         const ctx = canvas.getContext('2d');
         ctx.clearRect(0,0,canvas.width, canvas.height);
 
-        ctx.fillStyle = "#333";
+        const txtColor = "#000";
+        const qrWidth = 220;
+        const leftMargin = 12;
+
+        ctx.fillStyle = txtColor;
 
         // Prepare img elements
         const qrImg = new Image();
@@ -28,21 +32,21 @@ document.addEventListener('DOMContentLoaded', () => {
 
         // Draw images
         ispcLogo.onload = () => {
-            ctx.drawImage(ispcLogo, 25, 30, 200, 75)
+            ctx.drawImage(ispcLogo, leftMargin, 10, 200, 75)
         }
 
         qrImg.src = qr.toDataURL();
         qrImg.onload = () => {
-            ctx.drawImage(qrImg, 25, 110, 200, 200)
+            ctx.drawImage(qrImg, leftMargin, 90, qrWidth, qrWidth)
         }
         // Draw instrument ID as text
         ctx.font = '48px sans-serif';
         const txtWidth = Math.round(ctx.measureText(idInstr).width);
-        const txtLeftDist = (200 - txtWidth) / 2 + 25;
-        ctx.fillText(idInstr, txtLeftDist, 350);
+        const txtLeftDist = (220 - txtWidth) / 2 + leftMargin;
+        ctx.fillText(idInstr, txtLeftDist, 352);
 
         erihsLogo.onload = () => {
-            ctx.drawImage(erihsLogo, 25, 375, 200, 41)
+            ctx.drawImage(erihsLogo, 20, 370, 210, 41)
         }
         download.classList.remove('disabled');
     });