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I am working on RGB color formats and I came across the RGB formats as listed here. I was just wondering what will be the 25-bit ARGB1888 format bit-stream look like. Will it be

AUUUUUUU RRRRRRRR GGGGGGGG BBBBBBBB

or

UUUUUUUA RRRRRRRR GGGGGGGG BBBBBBBB

where A = Alpha bit, U = unused bit, R = Red Color, G = Green Color, B = Blue Color. Any help is greatly appreciated.

Thank You.

adykb
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  • I believe the alpha channel is also a full 8 bits, making it `AAAAAAAA RRRRRRRR GGGGGGGG BBBBBBBB`. Which octet would be first in a bitstream would depend on the endian-ness. – Joe Aug 06 '13 at 06:32
  • Hi! Thank You Joe for the reply. But if you could refer to the link it says 25-bit ARGB1888 but not 32-bit. Had it been 32-bit what you say is correct. – adykb Aug 06 '13 at 06:44

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