06995: All: Wrong aspect ratio / frame size

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
06995	Graphics	Major	Always	Jun 1, 2018, 07:31	Jun 2, 2018, 14:44

Tester	wuemura	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	No change required	OS	Windows 10 (64-bit)
Status [?]	Closed			Driver	nec/pce.cpp
Version	0.198	Fixed in Version		Build	64-bit
		Fixed in Git Commit		Github Pull Request #

Summary	06995: All: Wrong aspect ratio / frame size
Description	This machine doesn't have a 1088 x 242 screen size.
Steps To Reproduce	Load any cartridge or CD.
Additional Information	Affects snapshot or video recording.
Github Commit

Flags
Regression Version
Affected Sets / Systems	All

Attached Files	pce_video.png (34,048 bytes) Jun 1, 2018, 07:31 Uploaded by wuemura 1088 x 242?
Attached Files	0000.png (2,773 bytes) Jun 1, 2018, 07:33 Uploaded by wuemura Bomberman 94

No.15070 Tafoid Administrator Jun 1, 2018, 07:53 edited on: Jun 1, 2018, 07:54	This behavior is correct. For emulation purposes, the higher resolutions are needed to cover all possible outputs. While the final rendered/on-screen resolution is a much closer to an 4:3 output, internally, there is work being done which requires a much wider map of graphics which is denoted in this enlarged setting. If you want a normal sized snapshot or video, you and use the following command: -snapsize specify snapshot/movie resolution (<width>x<height>) or 'auto' to use minimal size super nintendo, galaxian-hardware based arcade games are other examples of this enlarged settings.
No.15073 wuemura Viewer Jun 1, 2018, 08:26	This should apply to ksys573 then? (6975) A warning would be nice though.
No.15074 Tafoid Administrator Jun 1, 2018, 08:48	Yes. Many systems will change its resolution on the fly. This is why some aviwrite fail or only record parts of the screen if a proper -snapsize is not chosen.
No.15080 Haze Senior Tester Jun 2, 2018, 14:44 edited on: Jun 2, 2018, 14:48	in the case of PCE it's also because the system can change resolution mid-screen, and the only way to mix the different lines and still use integer scaling is by using a common multiple of all possible combinations and using integer stretching. with PCFX it actually goes one further and different layers can have different resolutions. the Megadrive output might need to be changed to be like this too to support the Megaplay SMS/Genesis mixing. and yes, this breaks some of the filter effects (hq4x, eagle etc.) that make poor assumptions about pixels.