How to detect if a RGB is fully transparent?
- by omega
In java, I want to make a fully transparent RGBA, and I do that by using
public static int getTransparentRGB() {
int r = 0;
int g = 0;
int b = 0;
int a = 0;
int new_pixel = (a << 24) | (r << 16) | (g << 8) | b;
return new_pixel;
}
Color color = new Color(getTransparentRGB());
System.out.println(color.getAlpha()); // -> 255 ?!
I purposely keep all rgba values 0. However after I create the Color object with the rgba value as the constructor, if I call .getAlpha(), I get 255 even though I made the rgb value with a 0 alpha. If it returns 255, how could I tell the difference between a Color object that wasn't transparent, because that would also have a 255 alpha.
I expect the color object to return a 0 alpha based on the function above.
Does anyone know whats going on?
Thanks
