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View Full Version : Laptop GPUs with more than 8bit/component support



paratras
02-02-2009, 09:15 AM
Is there any laptop GPU that supports creating rendering contexts with high precision color, like 10/10/10, 12/12/12/12, or even 16/16/16/16 ?

And... is such precision available only on pbuffers or also on application windows?

PkK
02-02-2009, 10:05 AM
From reading the documentation the intel hardware supports it; however it's not exposed in the driver (it's surely not in the Linux driver and AFAIK not in Windows either).

Philipp

pjmlp
02-02-2009, 12:47 PM
Maybe it is only exposed in DirectX?

overlay
02-02-2009, 02:21 PM
Probably any nVidia Quadro FX based on a G80 core:

ftp://download.nvidia.com/XFree86/Linux-x86_64/180.27/README/chapter-28.html

I have an nVidia Quadro FX 3600M. On Ubuntu 8.10 GNU/Linux x86_64 with driver 177.82, glxinfo gives me 284 GLXFBConfigs. Some of them have 16 even 32 bit per channel:


visual x bf lv rg d st colorbuffer ax dp st accumbuffer ms cav
id dep cl sp sz l ci b ro r g b a bf th cl r g b a ns b eat
----------------------------------------------------------------------
[...]
0x1f1 0 sg 0 32 0 r . . 16 16 0 0 4 0 0 16 16 16 16 0 0 None
0x1f2 0 sg 0 32 0 . . 16 16 0 0 4 0 0 16 16 16 16 0 0 None
0x1f3 0 sg 0 32 0 r y . 16 16 0 0 4 0 0 16 16 16 16 0 0 None
0x1f4 0 sg 0 32 0 y . 16 16 0 0 4 0 0 16 16 16 16 0 0 None
0x1f5 0 sg 0 32 0 r . . 32 0 0 0 4 0 0 16 16 16 16 0 0 None
0x1f6 0 sg 0 32 0 . . 32 0 0 0 4 0 0 16 16 16 16 0 0 None
0x1f7 0 sg 0 32 0 r y . 32 0 0 0 4 0 0 16 16 16 16 0 0 None
0x1f8 0 sg 0 32 0 y . 32 0 0 0 4 0 0 16 16 16 16 0 0 None
0x1f9 0 sg 0 64 0 r . . 16 16 16 16 4 0 0 16 16 16 16 0 0 None
0x1fa 0 sg 0 64 0 . . 16 16 16 16 4 0 0 16 16 16 16 0 0 None
0x1fb 0 sg 0 64 0 r y . 16 16 16 16 4 0 0 16 16 16 16 0 0 None
0x1fc 0 sg 0 64 0 y . 16 16 16 16 4 0 0 16 16 16 16 0 0 None
0x1fd 0 sg 0 128 0 r . . 32 32 32 32 4 0 0 16 16 16 16 0 0 None
0x1fe 0 sg 0 128 0 . . 32 32 32 32 4 0 0 16 16 16 16 0 0 None
0x1ff 0 sg 0 128 0 r y . 32 32 32 32 4 0 0 16 16 16 16 0 0 None
0x200 0 sg 0 128 0 y . 32 32 32 32 4 0 0 16 16 16 16 0 0 None
0x201 0 sg 0 32 0 r . . 16 16 0 0 4 24 0 16 16 16 16 0 0 None
0x202 0 sg 0 32 0 . . 16 16 0 0 4 24 0 16 16 16 16 0 0 None
0x203 0 sg 0 32 0 r y . 16 16 0 0 4 24 0 16 16 16 16 0 0 None
0x204 0 sg 0 32 0 y . 16 16 0 0 4 24 0 16 16 16 16 0 0 None
0x205 0 sg 0 32 0 r . . 16 16 0 0 4 24 8 16 16 16 16 0 0 None
0x206 0 sg 0 32 0 . . 16 16 0 0 4 24 8 16 16 16 16 0 0 None
0x207 0 sg 0 32 0 r y . 16 16 0 0 4 24 8 16 16 16 16 0 0 None
0x208 0 sg 0 32 0 y . 16 16 0 0 4 24 8 16 16 16 16 0 0 None
0x209 0 sg 0 32 0 r . . 32 0 0 0 4 24 0 16 16 16 16 0 0 None
0x20a 0 sg 0 32 0 . . 32 0 0 0 4 24 0 16 16 16 16 0 0 None
0x20b 0 sg 0 32 0 r y . 32 0 0 0 4 24 0 16 16 16 16 0 0 None
0x20c 0 sg 0 32 0 y . 32 0 0 0 4 24 0 16 16 16 16 0 0 None
0x20d 0 sg 0 32 0 r . . 32 0 0 0 4 24 8 16 16 16 16 0 0 None
0x20e 0 sg 0 32 0 . . 32 0 0 0 4 24 8 16 16 16 16 0 0 None
0x20f 0 sg 0 32 0 r y . 32 0 0 0 4 24 8 16 16 16 16 0 0 None
0x210 0 sg 0 32 0 y . 32 0 0 0 4 24 8 16 16 16 16 0 0 None
0x211 0 sg 0 64 0 r . . 16 16 16 16 4 24 0 16 16 16 16 0 0 None
0x212 0 sg 0 64 0 . . 16 16 16 16 4 24 0 16 16 16 16 0 0 None
0x213 0 sg 0 64 0 r y . 16 16 16 16 4 24 0 16 16 16 16 0 0 None
0x214 0 sg 0 64 0 y . 16 16 16 16 4 24 0 16 16 16 16 0 0 None
0x215 0 sg 0 64 0 r . . 16 16 16 16 4 24 8 16 16 16 16 0 0 None
0x216 0 sg 0 64 0 . . 16 16 16 16 4 24 8 16 16 16 16 0 0 None
0x217 0 sg 0 64 0 r y . 16 16 16 16 4 24 8 16 16 16 16 0 0 None
0x218 0 sg 0 64 0 y . 16 16 16 16 4 24 8 16 16 16 16 0 0 None
0x219 0 sg 0 128 0 r . . 32 32 32 32 4 24 0 16 16 16 16 0 0 None
0x21a 0 sg 0 128 0 . . 32 32 32 32 4 24 0 16 16 16 16 0 0 None
0x21b 0 sg 0 128 0 r y . 32 32 32 32 4 24 0 16 16 16 16 0 0 None
0x21c 0 sg 0 128 0 y . 32 32 32 32 4 24 0 16 16 16 16 0 0 None
0x21d 0 sg 0 128 0 r . . 32 32 32 32 4 24 8 16 16 16 16 0 0 None
0x21e 0 sg 0 128 0 . . 32 32 32 32 4 24 8 16 16 16 16 0 0 None
0x21f 0 sg 0 128 0 r y . 32 32 32 32 4 24 8 16 16 16 16 0 0 None
0x220 0 sg 0 128 0 y . 32 32 32 32 4 24 8 16 16 16 16 0 0 None

paratras
02-05-2009, 01:36 AM
Probably any nVidia Quadro FX based on a G80 core:

ftp://download.nvidia.com/XFree86/Linux-x86_64/180.27/README/chapter-28.html

I have an nVidia Quadro FX 3600M. On Ubuntu 8.10 GNU/Linux x86_64 with driver 177.82, glxinfo gives me 284 GLXFBConfigs. Some of them have 16 even 32 bit per channel:


Can you use such GLXFBConfigs for on-screen OpenGL windows, or is it only for offscreen rendering? And, does the display technology support some kind of dithering when converting from 16/16/16/16 to the 8/8/8/8 format in the monitor screen? (I don't mean the OpenGL dithering feature, since it's ordered dithering and very low quality... I mean some higher quality dithering).

paratras
02-05-2009, 01:36 AM
I've found that ATI Mobility Radeon HD 2000 and 3000 series have this feature on their spec lists: "Spatial/temporal dithering provides 30-bit color quality on 24-bit and 18-bit displays".

Unfortunately they don't publish their OpenGL technical specs, so I don't know if you can create 10/10/10/2 windows for OpenGL rendering. Does anybody know if it's supported?

overlay
02-05-2009, 12:03 PM
For the first question, I don't know.

For the second question, the nVidia link says there is some dithering when the output go through a flat panel:

When displaying a depth 30 image on a digital flat panel, the color data will be dithered to 8 or 6 bits per pixel, depending on the capabilities of the flat panel. VGA outputs can display the full 10 bit range of colors.