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Dolphin, the GameCube and Wii emulator - Forums › Dolphin Emulator Discussion and Support › General Discussion v
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XFB
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XFB
02-16-2011, 09:41 AM
#1
ExtremeDude2 Offline
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What is XFBHuh
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02-16-2011, 10:14 AM
#2
NaturalViolence Offline
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XFB stands for external framebuffer. It's a static location in the GC/Wii memory where a framebuffer object is stored. After a game copies a framebuffer object from the efb into the xfb scaling, frame merging, conversion from RGB to YUV, and other changes are applied to the copy in the xfb to prepare it to be scanned out to the display in yuv format.
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02-16-2011, 10:15 AM (This post was last modified: 02-16-2011, 10:15 AM by Squall Leonhart.)
#3
Squall Leonhart Offline
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(02-16-2011, 10:14 AM)NaturalViolence Wrote: XFB stands for external framebuffer. It's a static location in the GC/Wii memory where a framebuffer object is stored. After a game copies a framebuffer object from the efb into the xfb scaling, frame merging, conversion from RGB to YUV, and other changes are applied to the copy in the xfb to prepare it to be scanned out to the display in yuv format.

don't cater for lazy people.

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02-16-2011, 10:17 AM (This post was last modified: 02-16-2011, 10:18 AM by Xtreme2damax.)
#4
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Xtra Flatulent Beans.

In all seriousness, I believe it's referred to as the External Frame Buffer although I'm unsure exactly what it does other than rendering the game/efb in the native resolution.

:Edit: Damnit you guys ruined my post by posting. Dodgy
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02-16-2011, 10:36 AM (This post was last modified: 02-16-2011, 10:37 AM by NaturalViolence.)
#5
NaturalViolence Offline
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Quote:In all seriousness, I believe it's referred to as the External Frame Buffer although I'm unsure exactly what it does other than rendering the game/efb in the native resolution.

I partially answered that above. It does not change the internal resolution. For real xfb the resolution is scaled to the native, while for virtual xfb it is scaled to the backbuffer resolution (your screen resolution). Real xfb emulates it as an fbo in main memory (the xfb stuff is actually coded into the game). Virtual xfb uses a texture in video memory to emulate it (so some xfb code that the game uses might not work properly) and uses a different scaling filter.
"Normally if given a choice between doing something and nothing, I’d choose to do nothing. But I would do something if it helps someone else do nothing. I’d work all night if it meant nothing got done."  
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02-16-2011, 10:45 AM
#6
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Thanks for the quick answerersSmile
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02-16-2011, 10:49 AM
#7
hyperspeed Offline
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Good to know, thanks, NaturalViolence and Xtreme2damax.Wink
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02-17-2011, 12:04 AM
#8
inteGReddy Offline
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i have noticed that several games require xfb to get past the intro videos like with capcom vs snk eo.
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02-17-2011, 01:13 AM
#9
Nolonar Offline
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I have noticed that enabling XFB was needed in the newer revisions, to not drown my screen in shadow or fog (DX 9)
An issue I never had before btw. (and still don't have if I use DX 11)

I also noticed, that enabling XFB would cause crashes at some point where a crash isn't fathomable, like when the game is just waiting for an input while I get myself some drinks.
And that setting XFB to real instead of virtual would cause a very bad visual, like a .jpg with too much compression.


@ Squall Leonhart:
Although I'm not the one who opened this thread, I did use the search feature to do some research about XFB.
Almost all of the results were about whether or not it would be good to enable or disable XFB in a particular game.
As I didn't feel like browsing through hundreds of pages and as I knew how people like you react, when noobs ask question, I just gave up.

Seriously though, if you don't wish to answer, don't do it.
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02-17-2011, 06:38 AM
#10
NaturalViolence Offline
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Quote:And that setting XFB to real instead of virtual would cause a very bad visual, like a .jpg with too much compression.

Real xfb is designed to perfectly emulate how the xfb works on the real wii. In theory if it's working perfectly it should cause the game to look exactly the same as it would on a real wii. It scales the same way as the real wii and uses the same resolution (720 x 480). You'll also get the crappier framerate and color depth of the real wii's video output as well.

XFB should not be causing any crashes so I don't know what to say about that.
"Normally if given a choice between doing something and nothing, I’d choose to do nothing. But I would do something if it helps someone else do nothing. I’d work all night if it meant nothing got done."  
-Ron Swanson

"I shall be a good politician, even if it kills me. Or if it kills anyone else for that matter. "
-Mark Antony
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