SGX530 RGBA Output - Big Endian?

Herb Kutscha

The 'DM8168 is basically little-endian, but OpenGL ES is big-endian. The output of the SGX530 is "RGBA". I want to send it to a little-endian PC's GPU for output. The GPU takes 143 different surface formats, but none are RGBA. Is the RGBA in the tech reference big-endian, so that I can use it as little-endian ABGR format? How is the big-endian SGX530 managed in the little-endian 'DM8168?

over 13 years ago

0 Prabindh Sundareson over 13 years ago

TI__Expert 6580 points

Blue is always stored in 0th offset "in" memory for the 32bpp format, by SGX in all TI processor families. This is what is used by the Display controller as well, and supported by software frameworks. If this is not what you want, need to swap it through code or DMA.

0 Herb Kutscha over 13 years ago in reply to Prabindh Sundareson

Intellectual 610 points

Great answer. Your "0th offset is Blue" leaves no confusion. The format must be ARGB. That's my preferred format. It looks like the SGX530 takes care of most of our application.

The links are useful too, and they were unknown to me.

Thanks.

-Herb