Viewing Issue Advanced Details
ID Category [?] Severity [?] Reproducibility Date Submitted Last Update
02149 Graphics Minor Always Aug 22, 2008, 18:30 Aug 20, 2009, 15:53
Tester john_iv View Status Public Platform MAMEUI
Assigned To Resolution Not fixable OS Windows XP/Vista 32-bit
Status [?] Closed Driver
Version 0.127 Fixed in Version Build Normal
Fixed in Git Commit Github Pull Request #
Summary 02149: invaders: Gray line of pixels on lowest invader head in demo, need overlay adjusted slightly.
Description Perhaps similar to the problem that showed the red line on the invaders head it appears that we are getting a white/gray line on the head of the lowest invader in the demo screen. Maybe the green overlay needs to go up 1 or 2 pixels.

Happens using D3D9, bilinear filtering at at least 3.
Steps To Reproduce Use in-game [TAB] menu and under video options choose color overlay. Observe demo for issue, see pic.
Additional Information
Github Commit
Flags
Regression Version
Affected Sets / Systems invaders
Attached Files
png file icon invaders.png (9,593 bytes) Aug 22, 2008, 18:30
Relationships
related to 02049Resolved  invaders: Built in red color overlay goes too low and shows on top line of invaders heads in Vista only. 
Notes
3
User avatar
No.02182
john_iv
Senior Tester
Aug 22, 2008, 18:32
edited on: Aug 22, 2008, 18:47
Vista x86 btw.
User avatar
No.02189
Fujix
Administrator
Aug 23, 2008, 13:42
edited on: Oct 16, 2008, 18:06
Confirmed with any builds on Vista 64-bit. Not on XP.
It seems to be Vista-specific as 02049.
User avatar
No.04767
hap
Developer
Aug 4, 2009, 19:11
It's not Vista specific, and it only happens with bilinear filtering on. This artifact happens due to the top of the head of that invader being pixel 184 (according to invaders.lay) and the 'legs' of the invaders in-game on the last white row being pixel 183.

So, the thing is, they're 0 pixels apart, causing the sub-pixel-size filtered line (either the top of the head of one, or the legs of a row) being part green, part white. This can't be fixed.

I guess the cause of 02049 was similar: the bottom of "GAME OVER" (now partially white) being too close to the invaders top row.