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add quiet zone to canvas image ( decode section )

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normal decode will work for v40
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wphiphi 2022-01-02 16:34:14 +01:00 • committed by GitHub
parent 42cfcdcb49
commit 8766a6b880
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1 changed files with 22 additions and 9 deletions
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33
js/main.js
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@ -300,17 +300,30 @@ function getInfoBits(){
***/ ***/
function generateResult(){ function generateResult(){
var c = document.getElementById("qr-result"); var c = document.getElementById("qr-result");
var size = 17+(qr_version*4); var size = 17+(qr_version*4);
c.width = qr_pixel_size*size; var ctx = c.getContext("2d");
c.height = qr_pixel_size*size;
var ctx = c.getContext("2d"); c.width = qr_pixel_size*size;
ctx.fillStyle = "#000"; c.height = qr_pixel_size*size;
// add quiet zone border and white fill
c.width += (qr_pixel_size*4) * 2;
c.height += (qr_pixel_size*4) * 2;
ctx.fillStyle = "#fff";
ctx.fillRect(0,0,c.width,c.height);
ctx.fillStyle = "#000";
for(var i=0; i < qr_array.length; i++){
for(var j=0; j < qr_array[i].length; j++){
var x = qr_pixel_size*j;
var y = qr_pixel_size*i;
//shift due to quiet zone
x += qr_pixel_size*4;
y += qr_pixel_size*4;
for(var i=0; i < qr_array.length; i++){
for(var j=0; j < qr_array[i].length; j++){
var x = qr_pixel_size*j;
var y = qr_pixel_size*i;
if(qr_array[i][j] == 1){ if(qr_array[i][j] == 1){
ctx.fillStyle = "#000"; ctx.fillStyle = "#000";
ctx.fillRect(x,y,qr_pixel_size,qr_pixel_size); ctx.fillRect(x,y,qr_pixel_size,qr_pixel_size);