Question

Does anyone know is there a better way to check if some image contain a (semi)transparent pixel beside going trough all pixels and check their alpha channel?

[pseudo]
    for each pixel in image:
        if pixel.alpha != 0xff:
            return true

Thanks in advance.

Answer 1

You could use BufferedImage.getType()
or
ColorModel.hasAlpha()
to check if there is an alpha channel.

If there is an alpha channel, you will have to check the individual pixels.