How can i find out where a BufferedImage has Alpha in Java?

alpha, bufferedimage, graphics, java

Solution

public static boolean isAlpha(BufferedImage image, int x, int y)
{
    return image.getRBG(x, y) & 0xFF000000 == 0xFF000000;
}

for(int x = 0; x < width; x++)
{
    for(int y = 0; y < height; y++)
    {
        alphaArray[x][y] = isAlpha(bufferedImage, x, y);
    }
}

Problem

I've got a BuferredImage and a boolean[][] array. I want to set the array to true where the image is completely transparant. Something like: ``` for(int x = 0; x < width; x++) { for(int y = 0; y < height; y++) { alphaArray[x][y] = bufferedImage.getAlpha(x, y) == 0; } } ``` But the getAlpha(x, y) method does not exist, and I did not find anything else I can use. There is a getRGB(x, y) method, but I'm not sure if it contains the alpha value or how to extract it. Can anyone help me? Thank you!

Original source

Related problems