08112: mhavoc, mhavoc2: Improper line order in vector graphics in Major Havoc

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
08112	Graphics	Trivial	Always	Oct 15, 2021, 19:15	Oct 15, 2021, 19:59

Tester	Zaghadka	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Open	OS	Windows 10/11 (64-bit)
Status [?]	Confirmed			Driver	atari/mhavoc.cpp
Version	0.236	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	08112: mhavoc, mhavoc2: Improper line order in vector graphics in Major Havoc
Description	In Major Havoc, since 173, the layer order of the lines has been wrong. The blue lines in the teaser screen overlap things they're not supposed to, such as the copyright message, the ship the "insert coins" text, the green "1 coin 1 play" text, etc. Surely it's a trivial bug, but the original machine behaved as in 173, with the blue lines remaining in the ground beneath the lettering and ship.
Steps To Reproduce	Launch MAME and get to the teaser screen.
Additional Information	Regression since 0.173. Disappearing graphics bug after 0.173 that was fixed in a later version. The fix remedied the disappearing graphics but not the line layer problem.
Github Commit

Flags
Regression Version	0.180
Affected Sets / Systems	mhavoc, mhavoc2

Attached Files	Major_Havoc_266.png (1,549,789 bytes) Oct 15, 2021, 19:15 Uploaded by Zaghadka mhavoc, MAME 0.266
Attached Files	Major_Havoc_173.png (1,315,243 bytes) Oct 15, 2021, 19:16 Uploaded by Zaghadka mhavoc, MAME 0.173

No.19352 Zaghadka Tester Oct 15, 2021, 19:19 edited on: Oct 15, 2021, 19:49	Tested it with HLSL disabled. Lines appear correctly with HLSL off. Appears to be an HLSL bug, regression 0.180.
No.19354 Zaghadka Tester Oct 15, 2021, 19:39 edited on: Oct 15, 2021, 19:48	Also noticed the "tunnel" effect of blue lines intensifying as it progresses. Also original behavior, faithfully reproduced by the 0.173 HLSL. Regression 0.174. My mistake on the regression for the line order bug. That regression was 0.180. In all cases, the tunnel effect only reproduced with HLSL on. It is specifically an HLSL feature in 0.173 prior.
No.19355 Tafoid Administrator Oct 15, 2021, 19:59 edited on: Oct 15, 2021, 19:59	I can confirm the blue lines being drawn over other vectors where they aren't typically expected with 0.180 regression (w/hlsl).