Function rurtle::floodfill::floodfill
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pub fn floodfill(img: &DynamicImage, start: (u32, u32), color: (u8, u8, u8, u8)) -> (u32, u32, DynamicImage)
Floodfill the given image, starting at the given source point and coloring
everything to color. Returns a Patch that contains the given colorized blob
with a transparent background. Also returns the (x, y) coordinates of the
upper left corner of the patch rectangle.