Ensure replacement color is positive (#505)

GoogleChromeLabs · Apr 20, 2021 · aa41b64 · aa41b64
1 parent 7b0fec4
commit aa41b64
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/packages/core/src/lib/ImageHelper.ts b/packages/core/src/lib/ImageHelper.ts
@@ -47,7 +47,7 @@ export class ImageHelper {
     // See https://github.com/GoogleChromeLabs/bubblewrap/issues/488#issuecomment-806560923.
     if (backgroundColor && image.hasAlpha()) {
       // The replacement colour is the same as the background colour, but fully transparent.
-      const replacementColor = (backgroundColor.rgbNumber() << 8) & 0xFFFFFF00;
+      const replacementColor = ((backgroundColor.rgbNumber() << 8) & 0xFFFFFF00) >>> 0;
 
       // Iterate over the pixels, check for fully transparent ones and replace with
       // replacementColor.