Format of TYPE_INT_RGB and TYPE_INT_ARGB

java colors rgb argb
Pro.Hessam picture Pro.Hessam · May 14, 2011 · Viewed 33.3k times · Source

Could anyone explain for me how java stores color in TYPE_INT_RGB and TYPE_INT_ARGB ?
Do these lines of code work properly for calculating red, green and blue ?

int red= (RGB>>16)&255;
int green= (RGB>>8)&255;
int blue= (RGB)&255;

And what about TYPE_INT_ARGB ? How can I get red, green and blue from TYPE_INT_ARGB?

Answer

Alberto picture Alberto · May 14, 2011

The TYPE_INT_ARGB represents Color as an int (4 bytes) with alpha channel in bits 24-31, red channels in 16-23, green in 8-15 and blue in 0-7.

The TYPE_INT_RGB represents Color as an int (4 bytes) int the same way of TYPE_INT_ARGB, but the alpha channel is ignored (or the bits 24-31 are 0).

Look the javadoc of java.awt.Color and java.awt.image.BufferedImage.

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