ATi unveil R420
- Thread starter engall
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Doomtrooper
Veteran
RussSchultz said:
Who got the X-box 2 contract, if the compression is as good as rumours say..then you can possibly see why besides the popular 'ATI took out 500 million to seduce M$'
Not sure whats funny about what you said.Doomtrooper said:RussSchultz said:
Who got the X-box 2 contract, if the compression is as good as rumours say..then you can possibly see why besides the popular 'ATI took out 500 million to seduce M$'
But ignoring that, what do "rumours say"?
Doomtrooper
Veteran
All I'm saying is, keep a open mind.
No, that wasn't what you were saying.
You were sniggling about the xbox2 contract, and pointing to "the rumours".
And that somehow is a response to saying that a new compression algorithm requires significant improvements over the industry standard one or it won't gain any traction--regardless of it being open source or not?
You were sniggling about the xbox2 contract, and pointing to "the rumours".
And that somehow is a response to saying that a new compression algorithm requires significant improvements over the industry standard one or it won't gain any traction--regardless of it being open source or not?
Doomtrooper
Veteran
Umm No, for the past two weeks I've read how the R420 would not be competetive with the 6800U. Well alot of these view points were always looking at brute force implementations, memory speed, core speed, pipelines. No one ever looked at 'other ways'.
Mind reading is not your fortay.
Mind reading is not your fortay.
Making sense isn't yours, apparently.Doomtrooper said:
Um no what?
How is that a response to a new texture format/compression algorithm needing to be a leap the current industry standard for it to gain traction?
What does any of that have to do with reading that the R420 won't be competitive--which wasn't even suggested by anything I said.
Doomtrooper
Veteran
Why would it have to be open source to be accepted ? Microsoft licensed S3TC , they also licensed PS 1.1 or nfiniteFX II from Nvidia for X-box 1.
I make sense just fine.
I make sense just fine.
Now you're really not making sense.Doomtrooper said:
I stated a compression algorithm had to be a considerable step forward to gain traction over the industry standard. Open source wasn't enough, as shown by FXTC.
And you started talking about XBOX contracts and laughing.
Most puzzling.
Nick Spolec
Newcomer
Maybe he's the type who likes to talk about X-Box and laugh?
Shadow buffers seem to be a weird situation. They -are- supported by the R3xx series in OpenGL, but apparently not in DirectX? Perhaps it's related to NVidia's render-depth-to-texture extension that ATI doesn't support. . . There are other methods for dumping the depth buffer into a texture, though -- at least in OpenGL. . .DemoCoder said:
Ostsol said:
I believe they are supported via a "back door" in DX that came across through the XBox.
As for 3Dc, wait a little. Its not a general compression scheme.
The R3xx series doesn't support shadow "buffers" (I have no idea where that name came from by the way, they've been called shadow maps since forever) natively, neither in D3D nor OpenGL. They use a 32 bit floating point texture and do the comparison in the fragment shader.
Nvidia have supported native depth textutres since the GeForce3 and perform the comparison with dedicated hardware *before* filtering. This means that nvidia have properly percentage closer filtered shadow maps for the cost of a texture lookup and ATI has aliased shadow maps for the same cost. If you want to, you can get properly filtered sghadow maps on ATi for a huge cost, you need to do all filtering in fragment shader yourself.
Nvidia have supported native depth textutres since the GeForce3 and perform the comparison with dedicated hardware *before* filtering. This means that nvidia have properly percentage closer filtered shadow maps for the cost of a texture lookup and ATI has aliased shadow maps for the same cost. If you want to, you can get properly filtered sghadow maps on ATi for a huge cost, you need to do all filtering in fragment shader yourself.
Ah, so it's a specific compression scheme is it?DaveBaumann said:
I thought it was all about compressing normals or some such like that...
http://www.gzeasy.com/newsphoto/y2k4/04/24/ati1.jpg
Same pic from a different angle. How much more starved for info can one get. :?
Same pic from a different angle. How much more starved for info can one get. :?
