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14 September 2019, 15:50
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#1 |
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Bug hunter
Join Date: Jul 2006
Location: Italy
Age: 48
Posts: 2,161
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Gfx glitch with Marvin's Marvellous Adventure etc
I've found some games like Marvin's Marvellous Adventure that show a strange flickering vertical line on the left border of the screen:
 Since I've seen it also with a few other games I wondered if it can be a WinUAE gfx glitch, since I don't remember them on my original A1200+B1260... |
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14 September 2019, 18:26
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#2 | |
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WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 49
Posts: 26,505
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Quote:
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14 September 2019, 19:12
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#3 | |
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Registered User
Join Date: Feb 2018
Location: France
Posts: 504
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Quote:
Hello, yes. Same issue with subpixel display emulation actived (see picture). Edit : and with subpixel display emulation actived another " glitch " appears (see picture 2). Edit2 : I add a savestate if that can help you. Last edited by Zarnal; 17 May 2021 at 19:10. |
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15 September 2019, 15:58
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#4 |
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WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 49
Posts: 26,505
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Confirmed.
It seems if start of sprite is not "aligned" to start of bitplane and difference between bitplane and sprite start is less than 1 lores pixel, first row of sprite is not drawn. Still debugging.. |
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15 September 2019, 17:51
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#5 |
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WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 49
Posts: 26,505
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There is emulation bug but game really does have very narrow vertical line in left border, between black border and game area.
This is due to borderblank being delayed by one hires pixel (undocumented feature). It is probably almost invisible when using old small monitors but it is clearly visible when using Indivision or OSSC. It is static line, it does not flicker when moving like it does currently in UAE. |
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15 September 2019, 18:20
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#6 |
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Bug hunter
Join Date: Jul 2006
Location: Italy
Age: 48
Posts: 2,161
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Interesting...
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15 September 2019, 18:38
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#7 |
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WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 49
Posts: 26,505
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Fixed. Also in sub pixel mode display is "more correct", extra line appears
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15 September 2019, 19:24
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#8 |
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Bug hunter
Join Date: Jul 2006
Location: Italy
Age: 48
Posts: 2,161
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Is it ok the glitch of visible left border during intro (pciture 2) as reported also by Zarnal, when subpixel is on?
http://eab.abime.net/showpost.php?p=1345527&postcount=3 |
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15 September 2019, 19:26
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#9 | |
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WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 49
Posts: 26,505
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Quote:
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15 September 2019, 23:34
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#10 |
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Bug hunter
Join Date: Jul 2006
Location: Italy
Age: 48
Posts: 2,161
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Subpixel ON causes left screen border gfx corruption with Agony. When OFF border looks fine.
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16 September 2019, 00:05
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#11 | |
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Defendit numerus
Join Date: Mar 2017
Location: Crossing the Rubicon
Age: 53
Posts: 4,468
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Quote:
Agony need a patch on AGA machines
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16 September 2019, 00:18
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#12 | |
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Bug hunter
Join Date: Jul 2006
Location: Italy
Age: 48
Posts: 2,161
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Quote:
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16 September 2019, 00:29
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#13 | |
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Defendit numerus
Join Date: Mar 2017
Location: Crossing the Rubicon
Age: 53
Posts: 4,468
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Quote:
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16 September 2019, 08:45
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#14 |
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Bug hunter
Join Date: Jul 2006
Location: Italy
Age: 48
Posts: 2,161
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Indeed forcing Chipset ECS solves the left border issue with Agony (WHD), even with Subpixel ON.
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16 September 2019, 16:36
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#15 |
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WinUAE developer
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 49
Posts: 26,505
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Yeah, Agony left border really looks like that on real AGA hardware.
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05 October 2020, 22:59
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#16 |
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Bug hunter
Join Date: Jul 2006
Location: Italy
Age: 48
Posts: 2,161
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Overkill AGA WHDLoad is also affected by this gfx glitch in the left border when Subpixel Display Emulation is enabled:
 WinUAE 4.4.x included... |
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06 October 2020, 12:50
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#17 |
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Old retro god.
Join Date: Apr 2002
Location: Northolt, West London
Age: 62
Posts: 857
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Would this line be seen on a normal 4:3 crt monitor?
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19 October 2020, 01:06
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#18 |
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Bug hunter
Join Date: Jul 2006
Location: Italy
Age: 48
Posts: 2,161
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Same border glitch also for T-Racer WHD on WinUAE.
Up-to-date list of still affected WHD games I've found with this kind of border glitch:
Last edited by hexaae; 13 November 2020 at 11:43. |
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12 November 2020, 18:24
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#19 |
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Bug hunter
Join Date: Jul 2006
Location: Italy
Age: 48
Posts: 2,161
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Added Prime Mover to the list
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13 November 2020, 11:43
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#20 |
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Bug hunter
Join Date: Jul 2006
Location: Italy
Age: 48
Posts: 2,161
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Added Brian the Lion to the list:http://eab.abime.net/showpost.php?p=...1&postcount=18
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