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Only use integer scaling for clearer QR codes

master
Martin Boonk 2021-12-07 19:45:12 +01:00
parent fd8c1c237f
commit 8cc770a69e
1 changed files with 22 additions and 8 deletions
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30
apps/qrcode/custom.html
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@ -42,21 +42,19 @@
<script src="../../core/lib/imageconverter.js"></script> <script src="../../core/lib/imageconverter.js"></script>
<script> <script>
var targetWidth = 200; var targetSize = 200;
var targetHeight = 200;
function onInit(device) { function onInit(device) {
if (device && device.info && device.info.g) { if (device && device.info && device.info.g) {
targetWidth = device.info.g.width - 20; border = 4;
targetHeight = device.info.g.height - 20; targetSize = Math.min(device.info.g.width - border, device.info.g.height - border);
} }
qrcode = new QRCode("qrcode", { qrcode = new QRCode("qrcode", {
text: document.getElementById("url").value, text: document.getElementById("url").value,
width: targetWidth,
height: targetHeight,
colorDark : "#000000", colorDark : "#000000",
colorLight : "#ffffff", colorLight : "#ffffff",
}); });
refreshQRCode();
} }
//https://github.com/evgeni/qifi/blob/gh-pages/index.html#L168 //https://github.com/evgeni/qifi/blob/gh-pages/index.html#L168
@ -84,16 +82,32 @@
} }
function refreshQRCode(){ function refreshQRCode(){
qrcode.clear(); // clear the code. qrcode.clear(); // clear the code.
var qrText = "";
if(document.getElementById("useWIFI").checked){ if(document.getElementById("useWIFI").checked){
const ssid = document.getElementById("ssid").value; const ssid = document.getElementById("ssid").value;
const password = document.getElementById("password").value; const password = document.getElementById("password").value;
const encryption = document.getElementById("encryption").value; const encryption = document.getElementById("encryption").value;
const hidden = document.getElementById("hidden").checked; const hidden = document.getElementById("hidden").checked;
const wifiString = generateWifiString(ssid, password, hidden, encryption); const wifiString = generateWifiString(ssid, password, hidden, encryption);
qrcode.makeCode(wifiString); qrText= wifiString;
}else{ }else{
qrcode.makeCode(document.getElementById("url").value); qrText = document.getElementById("url").value;
} }
qrcode._htOption.text = qrText;
qrcode.makeCode(qrText);
var integerScale = Math.max(Math.floor(targetSize / (qrcode._oQRCode.moduleCount + 1)),1);
finalSizeQr = integerScale * (qrcode._oQRCode.moduleCount + 1);
finalSizeCanvas = finalSizeQr - 1;
qrcode._htOption.width = finalSizeQr;
qrcode._htOption.height = finalSizeQr;
document.getElementsByTagName("canvas")[0].width = finalSizeCanvas;
document.getElementsByTagName("canvas")[0].height = finalSizeCanvas;
qrcode.makeCode(qrText);
} }
var qrcode; var qrcode;