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Make canvas transparent #55

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Make canvas transparent #55

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c2080ab
Make canvas transparent
Slowyn May 3, 2018
a0d1294
Clear rect before drawing
Slowyn May 3, 2018
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4 changes: 2 additions & 2 deletions lib/QRCode.js
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Original file line number Diff line number Diff line change
Expand Up @@ -18,7 +18,6 @@ function renderCanvas(canvas) {
canvas.height = size;
canvas.style.left = (window.innerWidth - size) / 2 + 'px';
if(window.innerHeight > size) canvas.style.top = (window.innerHeight - size) / 2 + 'px';
ctx.fillRect(0, 0, size, size);
var cells = this.cells;
var cellWidth = this.size / cells.length;
var cellHeight = this.size / cells.length;
Expand All @@ -30,6 +29,7 @@ function renderCanvas(canvas) {
var nTop = rowIndex * cellHeight;
ctx.fillStyle = ctx.strokeStyle = column ? bgColor : fgColor;
ctx.lineWidth = 1;
ctx.clearRect(nLeft, nTop, cellWidth, cellHeight);
ctx.fillRect(nLeft, nTop, cellWidth, cellHeight);
ctx.strokeRect(
Math.floor(nLeft) + 0.5,
Expand Down Expand Up @@ -104,7 +104,7 @@ var QRCode = createReactClass({
render={renderCanvas}
onLoad={this.props.onLoad}
onLoadEnd={this.props.onLoadEnd}
style={{height: size, width: size}}
style={{height: size, width: size, backgroundColor: 'transparent' }}
/>
</View>
);
Expand Down