How to convert getRGB(x,y) integer pixel to Color(r,g,b,a) in Java?
I have the integer pixel I got from getRG开发者_运维知识库B(x,y)
, but I don't have any clue about how to convert it to RGBA format. For example, -16726016
should be Color(0,200,0,255)
. Any tips?
If I'm guessing right, what you get back is an unsigned integer of the form 0xAARRGGBB
, so
int b = (argb)&0xFF;
int g = (argb>>8)&0xFF;
int r = (argb>>16)&0xFF;
int a = (argb>>24)&0xFF;
would extract the color components. However, a quick look at the docs says that you can just do
Color c = new Color(argb);
or
Color c = new Color(argb, true);
if you want the alpha component in the Color as well.
UPDATE
Red and Blue components are inverted in original answer, so the right answer will be:
int r = (argb>>16)&0xFF;
int g = (argb>>8)&0xFF;
int b = (argb>>0)&0xFF;
updated also in the first piece of code
Color c = new Color(-16726016, true);
System.out.println(c.getRed());
System.out.println(c.getGreen());
System.out.println(c.getBlue());
System.out.println(c.getAlpha());
prints out:
0
200
0
255
Is that what you mean?
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