Yoshioki
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HDMI output with color depth more than 24bit

Tue Nov 26, 2013 4:48 am

Does rasp pi support color depth more than 24bit output via HDMI? I know that HDMI standard can have 30/32/36 bit color depth. Is there anyway to do that with pi.

P/S: I'm using opengl es 2.0. If supported, how can I use. Thanks.

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jbeale
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Re: HDMI output with color depth more than 24bit

Tue Nov 26, 2013 7:25 am

I guess you're thinking of the "deep color" which is an optional feature in HDMI 1.3 but I have not seen anyone mention the R-Pi being capable of > 24 bpp. I suspect the Broadcom BCM2835 SoC on the R-Pi which provides the HDMI output doesn't support such features.

jamesh
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Re: HDMI output with color depth more than 24bit

Tue Nov 26, 2013 9:25 am

The encoder doesn't - very little point - an extra couple of bits of information you cannot see compared with the required doubling of the data rate.

Not sure about the HDMI out, but my guess would be no, since we rarely use higher bitdepths internally.
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vadim
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Re: HDMI output with color depth more than 24bit

Tue Nov 26, 2013 11:13 am

If you have a device that is capable of correctly displaying 24bits I bet it's not a cheap RPi you're going to connect to it. Why bother about 36bits if all you see is 6 per channel?

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