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Cut out the logo if the QR and logo background are transparent #212

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Cut out the logo if the QR and logo background are transparent #212

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18 changes: 17 additions & 1 deletion Example/src/App.tsx
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
import React from 'react';
import {SafeAreaView, ScrollView, Text} from 'react-native';
import {SafeAreaView, ScrollView, Text, View} from 'react-native';
import SVG from './assets/ruby.svg';
import Description from './components/Description';
import QRCode from 'react-native-qrcode-svg';
Expand Down Expand Up @@ -50,6 +50,21 @@ const localPngQRCode = (
</Description>
);

const localTransparentPngQRCode = (
<Description text="QR code with local transparent PNG">
<View style={{backgroundColor: 'blue'}}>
<QRCode
value={googleUrl}
size={qrCodeSize}
logo={require('./assets/google.png')}
logoSize={logoSize}
logoBackgroundColor="transparent"
backgroundColor="transparent"
/>
</View>
</Description>
);

const localPngBackgroundColorQRCode = (
<Description text="QR code with local PNG with background color avatar">
<QRCode
Expand Down Expand Up @@ -119,6 +134,7 @@ const App = () => {
{colorfulQRCODe}
{urlPngQRCode}
{localPngQRCode}
{localTransparentPngQRCode}
{localPngBackgroundColorQRCode}
{urlSvgQRCode}
{stringSvgQRCode}
Expand Down
15 changes: 15 additions & 0 deletions src/index.js
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Original file line number Diff line number Diff line change
Expand Up @@ -122,6 +122,9 @@ const QRCode = ({
const { path, cellSize } = result;
const displayLogo = logo || logoSVG;

const logoPosition = (size - logoSize - logoMargin * 2) / 2;
const logoPositionEnd = logoPosition + logoSize + logoMargin * 2;

return (
<Svg
testID={testID}
Expand All @@ -146,6 +149,12 @@ const QRCode = ({
<Stop offset="0" stopColor={linearGradient[0]} stopOpacity="1" />
<Stop offset="1" stopColor={linearGradient[1]} stopOpacity="1" />
</LinearGradient>
<ClipPath id="invert-clip-logo">
<Path
d={`M0,0 L${size},0 L${size},${size} L0,${size} Z
M${logoPosition},${logoPosition} L${logoPosition},${logoPositionEnd} L${logoPositionEnd},${logoPositionEnd} L${logoPositionEnd},${logoPosition} Z`}
/>
</ClipPath>
</Defs>
<G>
<Rect
Expand All @@ -162,6 +171,12 @@ const QRCode = ({
strokeLinecap="butt"
stroke={enableLinearGradient ? "url(#grad)" : color}
strokeWidth={cellSize}
clipPath={
displayLogo &&
logoBackgroundColor === "transparent" &&
backgroundColor === "transparent" &&
"url(#invert-clip-logo)"
}
/>
</G>
{displayLogo &&
Expand Down