 No.21186
Robbbert Senior Tester
Mar 23, 2023, 03:32
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Unable to replicate this with current git. |
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 No.21189
cuavas Administrator
Mar 23, 2023, 09:02
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Which render module? If bgfx, which backend? If d3d, is hlsl on or off? Windowed or fullscreen? What GPU and driver version? |
 No.21190
ICEknight Tester
Mar 23, 2023, 15:58
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> Which render module? bgfx. > If bgfx, which backend? Any. > Windowed or fullscreen? Both. > What GPU and driver version? Any, tested with different cards and computers with Windows 10. tl;dr: Happens when using bgfx, any combination. |
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No.21192
Robbbert Senior Tester
Mar 23, 2023, 23:49
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With bgfx it is confirmed. >mame -video bgfx nes smb |
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No.21196
cuavas Administrator
Mar 24, 2023, 01:35
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What do the affected systems have in common which is different from the unaffected systems? |
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No.21197
Robbbert Senior Tester
Mar 24, 2023, 04:28
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I assume that is a rhetorical question, as that is a job for the assigned dev to determine. However, I did more testing, and established 3 groups of systems. 1. The sliders don't work at all - examples are mbee, ssem, ccs2422 (they work with d3d) 2. The sliders work correctly - most arcade games 3. The bug reported here occurs - anything with a software list item, plus some other random things such as h19, gimix, invaders, dm3270. |
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No.21198
cuavas Administrator
Mar 24, 2023, 08:27
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No it's a serious question. There's clearly some difference between the systems where it happens, probably somehow related to screen configuration. Determining what ths difference is would be the first step in working out what's going wrong. I'm not going to believe the presence of software list items triggers the bug - they don't affect the render stack at all. I mean are you saying it happens with slotted MVS (e.g. mame neogeo kof99) but not the fixed MVS configurations (e.g. mame kof99)? |
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No.21199
Robbbert Senior Tester
Mar 24, 2023, 08:41
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I tested 3 versions of kof99 1. kof99 - all is good 2. aes kof99 - sliders don't work 3. neogeo kof99 - all is good I would assume they all use exactly the same screen coding, so what do you make of that? |
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No.21201
cuavas Administrator
Mar 24, 2023, 13:18
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Just tested all three kof99 variants and a couple of NES games with a recent build, and the screen brightness and contrast sliders are non-functional for all of them with BGFX. I can’t get the behaviour ICEknight described at all. Maybe it’s something triggering undefined behaviour, and the “certain systems” part is a red herring? |
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No.21202
cuavas Administrator
Mar 24, 2023, 13:33
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Unfortunately I don’t have a new enough version of valgrind here to deal with BGFX (the version I have can’t handle “vcvtph2ps ymm5,xmm5” instructions), so I can’t find check for uninitialised variables that way. |
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No.21203
Robbbert Senior Tester
Mar 24, 2023, 14:03
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I just updated to the latest git, and some behaviour has changed. I'm only adjusting Brightness (but the Contrast and Gamma have the same issues). schaser, invaders and invadpt2 all behave the same now, the sliders have no effect, but if you leave (for example the brightness all the way up), then quit and restart, suddenly the brightness *is* all the way up. So the setting is being saved and restored correctly, but not being applied "live". Yet, kof99 and captcomm, the sliders do work live, there's no bug at all with them. And nes smb, it's exactly how iceknight says - it applies, up and down, but while the Del key returns it to 1.0, the screen doesn't follow suit. So yes, either undefined behaviour, a straight-out bug, or the dreaded undefined variable. |
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No.21206
ICEknight Tester
Mar 24, 2023, 17:36
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Just updated the description, the bug seems to be tied to the Screen Brightness value being 1. |
 No.21228
Kale Developer
Mar 29, 2023, 16:16
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On my experience seldomly brightness/contrast/gamma don't pickup properly, and I have brightness and gamma to non-1. Windows 10, toaplan1.cpp games (outzone).brightness 0.95 contrast 1.0 gamma 0.95 [...] bgfx_path bgfx bgfx_backend auto bgfx_debug 0 bgfx_screen_chains unfiltered bgfx_shadow_mask slot-mask.png bgfx_lut bgfx_avi_name auto |
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No.21451
ICEknight Tester
14 days ago
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Why is this a duplicate of bug #8621 "Bgfx randomly ignores Brightness/Contrast/Gamma values when entering/exiting full screen"? |
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No.21500
ICEknight Tester
14 hours ago
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Just uploaded a new video showing how bug report #8621 also happens at random when changing between bgfx Screen Effects: |
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No.21501
cuavas Administrator
14 hours ago
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If you want to help, run the code in a memory analyser and work out where it’s misbehaving. Bumping with irrelevant videos is just going to annoy people. If you actually thought about how software works, it would be obvious why MT08621 is a duplicate of this. |
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No.21502
ICEknight Tester
13 hours ago
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I'm just a user reporting issues as I come across them, which is what this platform is for. If somebody moderating a bug tracker finds it annoying that regular users are not tracing and finding the source of the bugs themselves, I really don't know what to say. |
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No.21503
cuavas Administrator
13 hours ago
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There’s a difference between reporting issues and your constant stream of argumentative comments. You need to learn to listen and think. We’ve established that screen adjustments aren’t always applied with BGFX with no clear pattern for when it does or doesn’t happen. Your video adds nothing except making the comments take longer to load and sending web traffic to Google every time this bug is viewed. If you don’t have the skills to further isolate the issue, there’s probably nothing you can add. |