Emulator Issues #2517
closedJittery gfx when "Use XFB" is enabled
0%
Description
What steps will reproduce the problem?
- Launch some GC games like Mario Tennis, FZero, etc. with "Use XFB"
enabled.
What is the expected output? What do you see instead?
The boot and menu screens and jumping vertically.
What version of the product are you using? On what operating system?
2280, D3D plugin - win 7.
Please provide any additional information below.
This seems to have started happening in the last 10 revisions or so (or at
least I've never noticed it before).
Looks like someone else noticed this. Taken from a comment made in rev.
5272:
Comment by ebirnie, Today (10 hours ago) does no one else see the screen
jumping up and down?
Updated by kevinx0404 over 14 years ago
r5249 is the problem. Also affects trauma center second opinion.
Updated by BhaaL over 14 years ago
r5272 causes the "bobbing", see my comment there:
http://code.google.com/p/dolphin-emu/source/detail?r=5272#cg_1270472416577782
Not sure about r5249 tho?
Updated by mitjabamberger over 14 years ago
indeed this started to happen in r5272 and affects all games here, i.e. wii sports
and new smb wii.
using x64 build on win 7 pro, phenom ii x4 920, radeon 4550.
switching off xfb instantly fixes the bobbing.
Updated by kevinx0404 over 14 years ago
well, 5249 caused no bobbing on most games, just trauma center second opinion. 5272
made all games bob.
Updated by chane2k1 over 14 years ago
zelda wind waker also has this bobbing problem
Updated by rodolfoosvaldobogado over 14 years ago
- Status changed from New to Fixed
solved in my last commit
Updated by wespipes69 over 14 years ago
I'm still seeing this behavior in every single new build. Is this really fixed?
Updated by Anonymous over 14 years ago
Issue 2624 has been merged into this issue.
Updated by Anonymous over 14 years ago
- Status changed from Fixed to Questionable
Updated by skidau over 14 years ago
- Status changed from Questionable to Duplicate
Updated by rodolfoosvaldobogado over 14 years ago
to let this issue clear,the bobing effect is caused by interlacing, we compensate
interlacing by decresing the efb one line in the botton field this aligns the fields
and remove interlacing effect, but some games makes the same compensation in their
code, this cause this games to bop up and down 2 pixels.
Updated by NeoBrainX over 11 years ago
So I guess properly implementing interlacing would fix this issue?
Properly implementing interlacing should be easy enough (even without XFB emulation) by using a different shader for the "EFB texture"->"screen" copy (i.e. a shader which would drop every second framebuffer line, albeit it'll be a bit harder to make this work for arbitrary output resolution).
Updated by phire over 11 years ago
You don't need to emulate all of it, just enough so you actually know which field VI is actually going to render so you can compensate correctly.
...by using a different shader for the "EFB texture"->"screen" copy...
Interlacing is actually done at a later step, when VI scans the XFB out to screen. At the time of the copy, it's unknown which field is going to be rendered to screen (and it's often both fields)
Updated by NeoBrainX over 11 years ago
I know. My point was that we would do that when XFB emulation is disabled.
Updated by NeoBrainX over 11 years ago
That's why I was talking about the "EFB texture"->"screen" copy, not what's referred to as an EFB copy in the GX API.