That's something that concerns me actually. A recent MS post had some bloke talking about minimum requirements, and they mentioned '16x9'. I haven't heard anything about 4:3 output on any platform
Sausage said:There are several options for developers... I believe one path is to let the all-powerful hardware convert to a letterbox image for you, or the other option is for the developers to specifically cater for 4:3... I believe at this time we are specifically catering for 4:3...
london-boy said:Well 720p is by definition a widescreen resolution. You shouldn't be able to get a 720p 4:3 image, as there aren't that many TVs out that are HD but not widescreen. If any at all.
One could wonder about PC monitors though, hardly any are widescreen, so in case the consoles can be hooked up to PC monitors, the image would be letterboxed. That's my guess anyway.
Only if you don't use HDR.Xenos uses MSAA, which increases the number of samples, not pixels.
ShootMyMonkey said:I've only heard that in the form of rumors/speculation. MSAA+HDR isn't supported on G70 for a reason. It's mathematically stupid for reasons not the least of which is because you don't use HDR for purely rendering reasons; you use it for further calculations -- looking "visually acceptable" isn't good enough. Never mind floating point issues when you can potentially have edge deltas that are several orders of magnitude apart. MSAA is noise-prone.
The ROP's can handle several different formats, including a special FP10 mode. FP10 is a floating point precision mode in the format of 10-10-10-2 (bits for Red, Green, Blue, Alpha). The 10 bit colour storage has a 3 bit exponent and 7 bit mantissa, with an available range of -32.0 to 32.0. Whilst this mode does have some limitations it can offer HDR effects but at the same cost in performance and size as standard 32-bit (8-8-8-8) integer formats which will probably result in this format being used quite frequently on XBOX 360 titles. Other formats such as INT16 and FP16 are also available, but they obviously have space implications. Like the resolution of the MSAA samples, there is a conversion step to change the front buffer format to a displayable 8-8-8-8 format when moving the completed frame buffer portion from the eDRAM memory out to system RAM.
The ROP's are fully orthogonal so Multi-Sampling can operate with all pixel formats supported.
ShootMyMonkey said:Only if you don't use HDR.Xenos uses MSAA, which increases the number of samples, not pixels.
Dave's Excellent Xenos Article At B3D that has been available for a month now said:The ROP's are fully orthogonal so Multi-Sampling can operate with all pixel formats supported.[Edit: Which in context is clearly both FP16 and FP10]
Shifty Geezer said:That's something that concerns me actually. A recent MS post had some bloke talking about minimum requirements, and they mentioned '16x9'. I haven't heard anything about 4:3 output on any platform
Paul: Is it scaling down to the same aspect ratio? Or is it scaling it down to 4:3?
Jeff: We will actually give the game developers a choice. They can either have the Xbox 360 automatically crop or scale. Or, they can render a different aspect ratio scene of their game if they want to. Or, a game developer can say, "let the user choose." And there will actually be a setting in Xbox 360 to tell the box what it should do. And game developers can just hand it over to the box to decide what's best from a user's perspective.
ShootMyMonkey said:Hm... Interesting. I wonder if it's just the devkits that don't support it then. There was something going on a few days ago with AA costing us a 3:1 drop in framerate and which wasn't there when disabling the HDR passes. Might have just been an FP32 thing -- I'm really not up to date on what's going on with that particular team, but the profiles one of them showed on his daily updates show pretty clearly being limited on the beta kits with AA enabled in any form. That basically makes me think there's no way in hell it can be free... that and the whole "free lunch" thing.
If that big a hit was seen for AA on HDR, then I'd have to doubt MSAA was possible. Again, it may be a devkit thing or a no MSAA + FP32 thing (don't really know what they use). If it was SSAA only, the cost would have made perfect sense.I thought the question was whether HDR + MSAA was possible. I have no idea what it costs performance wise.
ShootMyMonkey said:Hm... Interesting. I wonder if it's just the devkits that don't support it then. There was something going on a few days ago with AA costing us a 3:1 drop in framerate and which wasn't there when disabling the HDR passes. Might have just been an FP32 thing -- I'm really not up to date on what's going on with that particular team, but the profiles one of them showed on his daily updates show pretty clearly being limited on the beta kits with AA enabled in any form. That basically makes me think there's no way in hell it can be free... that and the whole "free lunch" thing.
ShootMyMonkey said:If that big a hit was seen for AA on HDR, then I'd have to doubt MSAA was possible. Again, it may be a devkit thing or a no MSAA + FP32 thing (don't really know what they use).I thought the question was whether HDR + MSAA was possible. I have no idea what it costs performance wise.
Actually, I never really thought about it in terms of FP16/FP10/FP32 or whatever. HDRIE was the last thing I worked on involving HDR, so I always just assume HDR == either 128-bit float4 or RGBE... and I never liked RGBE. Force of habit.you came off pretty authoritative on the FP16+MSAA comment
I'm not telling you what project it is, if that's what you're wondering. It'll be a while before that happens. It'll also be a good few months before I get a devkit on my desk. Although I wouldn't be surprised if a PS3 devkit showed up before we got that far.Now go ask them whats up so you can give us all the juicy details!
ShootMyMonkey said:I'm not telling you what project it is, if that's what you're wondering. It'll be a while before that happens. It'll also be a good few months before I get a devkit on my desk. Although I wouldn't be surprised if a PS3 devkit showed up before we got that far.Now go ask them whats up so you can give us all the juicy details!