|
32-bit color
#365055 - 04/09/17 10:37 PM
|
|
|
Can i change color bits with MAME? For example i want to choose 32-bit color. if yes by which option
in mame.ini and settings menu?
|
|
|
|
|
> Can i change color bits with MAME? For example i want to choose 32-bit color. if yes
> by which option
> in mame.ini and settings menu?
There are no 32-bit displays. 30-bit displays exist, but MAME only outputs 24-bit video.
|
|
|
| CTOJAH |
|
MAME Addict
|
|
|
|
|
Reged: 07/13/10
|
|
Posts: 980
|
|
Loc: Macedonia,Veles
|
|
|
|
Send PM
|
|
|
Re: 32-bit color
[Re: Vas Crabb]
#365064 - 04/10/17 02:33 AM
|
|
|
> > Can i change color bits with MAME? For example i want to choose 32-bit color. if
> yes
> > by which option
> > in mame.ini and settings menu?
>
> There are no 32-bit displays. 30-bit displays exist, but MAME only outputs 24-bit
> video.
Perhaps He was thinking of 32 bit palette (true color) ?!
|
|
|
| Foxhack |
|
Furry guy
|
|
|
|
|
Reged: 01/30/04
|
|
Posts: 2409
|
|
Loc: Spicy Canada
|
|
|
|
Send PM
|
|
|
|
> Can i change color bits with MAME? For example i want to choose 32-bit color. if yes
> by which option
> in mame.ini and settings menu?
MAME will output video in whatever your video card is set to. Most computers nowadays run on 32-bit color by default, only older systems still run on 256 color / 16-bit color.
|
|
|
|
Re: 32-bit color
[Re: CTOJAH]
#365068 - 04/10/17 09:16 AM
|
|
|
> Perhaps He was thinking of 32 bit palette (true color) ?!
"True colour" isn't 32-bit. It's 24-bit direct RGB (16.7 million colours). If you have a 30-bit monitor, applications that take advantage of it work by uploading 48-bit OpenGL textures (16-bits per channel, the GPU drops the low six bits on each channel bringing it down to 10 bits per channel, or 30 bits per pixel).
|
|
|
|
Re: 32-bit color
[Re: Foxhack]
#365069 - 04/10/17 09:20 AM
|
|
|
> MAME will output video in whatever your video card is set to. Most computers nowadays
> run on 32-bit color by default, only older systems still run on 256 color / 16-bit
> color.
That's not really true - MAME will pretty much always pump out 24-bit (8-bit per channel) texture data, which may get downsampled if you're running in a lower depth video mode. Older versions of MAME could output lower depth, or even 8-bit indexed (256 colours), but that hasn't been supported in a long time.
|
|
|
|
Re: 32-bit color
[Re: Vas Crabb]
#365071 - 04/10/17 09:44 AM
|
|
|
> > MAME will output video in whatever your video card is set to. Most computers
> nowadays
> > run on 32-bit color by default, only older systems still run on 256 color / 16-bit
> > color.
>
> That's not really true - MAME will pretty much always pump out 24-bit (8-bit per
> channel) texture data, which may get downsampled if you're running in a lower depth
> video mode. Older versions of MAME could output lower depth, or even 8-bit indexed
> (256 colours), but that hasn't been supported in a long time.
Windows has always called it 32-bit mode, as opposed to 24-bit mode which was slow and generally not widely supported (presumably due to alignment or something)
being a pedantic asshole about it doesn't make the project look friendly.
as for what the original poster was asking, MAME only really works properly with those modes these days, things like the 8-bit palletized modes were removed a long time ago, chances are if you're running a modern version on a modern OS it is running in '32-bit colour' mode already.
|
|
|
|
Re: 32-bit color
[Re: Vas Crabb]
#365075 - 04/10/17 03:08 PM
|
|
|
> > Perhaps He was thinking of 32 bit palette (true color) ?!
>
> "True colour" isn't 32-bit. It's 24-bit direct RGB (16.7 million colours). If you
> have a 30-bit monitor, applications that take advantage of it work by uploading
> 48-bit OpenGL textures (16-bits per channel, the GPU drops the low six bits on each
> channel bringing it down to 10 bits per channel, or 30 bits per pixel>
Isn't 24-bit truecolor and an 8-bit alpha channel called 32-bit truecolor on Windows? Edit: nevermind haze answered it already
Edited by RdW (04/10/17 03:09 PM)
|
|
|
| R. Belmont |
|
Cuckoo for IGAvania
|
|
|
|
|
|
Reged: 09/21/03
|
|
Posts: 9716
|
|
Loc: ECV-197 The Orville
|
|
|
|
Send PM
|
|
|
Re: 32-bit color
[Re: Haze]
#365079 - 04/10/17 04:53 PM
|
|
|
> as for what the original poster was asking, MAME only really works properly with
> those modes these days, things like the 8-bit palletized modes were removed a long
> time ago, chances are if you're running a modern version on a modern OS it is running
> in '32-bit colour' mode already.
I'm willing to bet either he's talking about a version where 8-bit palettized modes are a thing or this is a prelude to a "I want to set MAME so SF2 has 24-bit sprites" type of thing.
|
|
|
|
Re: 32-bit color
[Re: Haze]
#365092 - 04/11/17 03:37 AM
|
|
|
> > > MAME will output video in whatever your video card is set to. Most computers
> > nowadays
> > > run on 32-bit color by default, only older systems still run on 256 color /
> 16-bit
> > > color.
> >
> > That's not really true - MAME will pretty much always pump out 24-bit (8-bit per
> > channel) texture data, which may get downsampled if you're running in a lower depth
> > video mode. Older versions of MAME could output lower depth, or even 8-bit indexed
> > (256 colours), but that hasn't been supported in a long time.
>
> Windows has always called it 32-bit mode, as opposed to 24-bit mode which was slow
> and generally not widely supported (presumably due to alignment or something)
>
> being a pedantic asshole about it doesn't make the project look friendly.
>
> as for what the original poster was asking, MAME only really works properly with
> those modes these days, things like the 8-bit palletized modes were removed a long
> time ago, chances are if you're running a modern version on a modern OS it is running
> in '32-bit colour' mode already.
The horrors of Intel's i810 chipset. 24-bit was the max setting in GDI/DirectDraw, 16-bit only in OpenGL/D3D. Cue random emulator crashing on load when it couldn't set either 32-bit or 16-bit mode because the user had a 24-bit desktop instead! To make it even worse, in Intel's infinite wisdom, every computer which had the 82810 only came with PCI slots - board manufacturers had to specify the 82815 chipset to get an AGP slot. The i815 onboard video was exactly the same as the i810 however.
The S3 ViRGE and a few other 90s PCI cards also maxed out at 24-bit on the desktop (the older Trio series had 32-bit output despite the ViRGE being based on the same design, go figure - of course I wouldn't put it past Microsoft to simply have a shit driver in those days, as I distinctly remember GTA1 having 32-bit depth support in pure DOS but only 24-bit in Windows on the same computer) but as with the Intel chipset they would probably only do 16-bit in accelerated modes. Or in the S3 ViRGE's case, "decelerated" mode, as apparently rendering in GDI was faster than rendering in DirectDraw, and D3D/OpenGL larger than 320x240 was out of the question!
|
|
|
|
Re: 32-bit color
[Re: RdW]
#365094 - 04/11/17 03:53 AM
|
|
|
> Isn't 24-bit truecolor and an 8-bit alpha channel called 32-bit truecolor on
> Windows? Edit: nevermind haze answered it already
There's no alpha channel at the monitor output. The mode Windows calls 32-bit is 24-bit colour (RGB 8-8-8) with unused padding to align it to 32-bit boundaries.
|
|
|
Index 
Threaded 
32-bit color
Reply
[Re: 
