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修复二维码大小显示问题 #11

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This commit is contained in:
CPPAlien 2018-07-17 11:49:34 +08:00
parent b8ffc14965
commit 5c8d3b3c1a
1 changed files with 3 additions and 9 deletions
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12
lib/qrcode.js
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@ -759,18 +759,12 @@
console.warn('No canvas provided to draw QR code in!') console.warn('No canvas provided to draw QR code in!')
return; return;
} }
//边框大小
const BORDER_SIZE = 0;
var size = Math.min(cavW, cavH); var size = Math.min(cavW, cavH);
str = that.utf16to8(str);//增加中文显示 str = that.utf16to8(str);//增加中文显示
var frame = that.getFrame(str), var frame = that.getFrame(str);
// 组件中生成qrcode需要绑定this // 组件中生成qrcode需要绑定this
px = Math.round(size / (width + BORDER_SIZE)); var px = size / width;
var roundedSize = px * (width + 8),
offset = Math.floor((size - roundedSize) / 2);
size = roundedSize;
//ctx.clearRect(0, 0, cavW, cavW);
if (bg) { if (bg) {
ctx.setFillStyle(bg) ctx.setFillStyle(bg)
ctx.fillRect(startX, startY, cavW, cavW); ctx.fillRect(startX, startY, cavW, cavW);
@ -779,7 +773,7 @@
for (var i = 0; i < width; i++) { for (var i = 0; i < width; i++) {
for (var j = 0; j < width; j++) { for (var j = 0; j < width; j++) {
if (frame[j * width + i]) { if (frame[j * width + i]) {
ctx.fillRect(startX + px * (4 + i) + offset, startY + px * (4 + j) + offset, px, px); ctx.fillRect(startX + px * i, startY + px * j, px, px);
} }
} }
} }