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Editorial Team
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Asked: 2026-05-28T05:44:34+00:00

I want to fill the color in white area for Paint based application so

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I want to fill the color in white area for Paint based application
so please give me suggestion for how to do this work..

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1 Answer

  1. Editorial Team

    I found the Solution with Flood fill algoritham 

    private void FloodFill(Bitmap bmp, Point pt, int targetColor, int replacementColor){
Queue<Point> q = new LinkedList<Point>();
q.add(pt);
while (q.size() > 0) {
    Point n = q.poll();
    if (bmp.getPixel(n.x, n.y) != targetColor)
        continue;

    Point w = n, e = new Point(n.x + 1, n.y);
    while ((w.x > 0) && (bmp.getPixel(w.x, w.y) == targetColor)) {
        bmp.setPixel(w.x, w.y, replacementColor);
        if ((w.y > 0) && (bmp.getPixel(w.x, w.y - 1) == targetColor))
            q.add(new Point(w.x, w.y - 1));
        if ((w.y < bmp.getHeight() - 1)
                && (bmp.getPixel(w.x, w.y + 1) == targetColor))
            q.add(new Point(w.x, w.y + 1));
        w.x--;
    }
    while ((e.x < bmp.getWidth() - 1)
            && (bmp.getPixel(e.x, e.y) == targetColor)) {
        bmp.setPixel(e.x, e.y, replacementColor);

        if ((e.y > 0) && (bmp.getPixel(e.x, e.y - 1) == targetColor))
            q.add(new Point(e.x, e.y - 1));
        if ((e.y < bmp.getHeight() - 1)
                && (bmp.getPixel(e.x, e.y + 1) == targetColor))
            q.add(new Point(e.x, e.y + 1));
        e.x++;
    }
}}

    flood fill in android:

    See this FloodFill

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