When the image has rounded corners, specifying an overlayColor will cause the remaining space in the corners to be filled with a solid color. This is useful in cases which are not supported by the Android implementation of rounded corners: - Certain resize modes, such as 'contain' - Animated GIFs
A typical way to use this prop is with images displayed on a solid
background and setting the overlayColor
to the same color
as the background.
For details of how this works under the hood, see http://frescolib.org/docs/rounded-corners-and-circles.html
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