09365: Artwork: global bounds override does not work in collection

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
09365	Graphics	Minor	Always	Jan 8, 2026, 17:02	Jan 20, 2026, 16:09

Tester	hap	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Open	OS
Status [?]	Acknowledged			Driver
Version	0.284	Fixed in Version		Build
		Fixed in Git Commit		Github Pull Request #

Summary	09365: Artwork: global bounds override does not work in collection
Description	Artwork (.lay) global bounds override does not work when used in a collection toggle. Whether or not it's documented, you can set bounds twice, and MAME will pick the 2nd one. When adding a bounds inside a collection (would be useful if a collection toggle has different bounds than default view), it simply won't work.
Steps To Reproduce	See attached simon test artwork. Put it in artwork/simon/simon.lay, run simon, go to video options and switch view.
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems

Attached Files	simon.zip (498 bytes) Jan 18, 2026, 17:42 Uploaded by hap test .lay file

No.24072 Robbbert Moderator Jan 17, 2026, 13:00	I have no idea what a collection is, or what it's supposed to do. Test 1 gave me white top half, and red bottom half. Test 2 gave a completely white screen. Test 3 gave same as Test 1. Test 4 occurs twice, both of them giving the same as Test 1. So, I really don't know what the point of all this is, sorry. Assigned to you so that you can make the next move.
No.24074 hap Developer Jan 17, 2026, 16:09 edited on: Jan 18, 2026, 17:34	A collection is: https://docs.mamedev.org/techspecs/layout_files.html#collections Do the tests in windowed mode, not full screen. See the .lay contents (in a text editor) for what it's trying to do. Please don't assign bugs to other people without consent. There's "Acknowledged" if you trust the reporter that there's an issue. Assigned = if a developer is working on (or is planning to) fixing the bug, which is their decision to make. I don't mean the Assigned field when bug is resolved, by then the meaning is different.
No.24075 hap Developer Jan 18, 2026, 17:43	Updated simon.lay test file (added more comments and fixed test 5 typo)
No.24076 cuavas Administrator Jan 20, 2026, 13:46	Bounds inside collections don’t make sense. You can have multiple collections active at the same time, which could potentially have contradictory bounds.
No.24077 hap Developer Jan 20, 2026, 16:09	I'm aware of that conflict. If you have 1 collection or order them in a specific way, a view could still make use of overriding bounds.