04487: all games with PlayStation GPU: shifted lines in textured quads

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
04487	Graphics	Minor	Always	Sep 17, 2011, 00:58	Jan 20, 2013, 18:48

Tester	hap	View Status	Public	Platform
Assigned To	smf	Resolution	Fixed	OS
Status [?]	Resolved			Driver
Version	0.143u5	Fixed in Version	0.148u1	Build
		Fixed in Git Commit		Github Pull Request #

Summary	04487: all games with PlayStation GPU: shifted lines in textured quads
Description	Textured quads have some lines with pixels shifted horizontally by 1 pixel. It is easiest to see on still(motionless) objects.
Steps To Reproduce	1 example: boot tektagt and wait for the 'parental advisory warning' screen
Additional Information	Regression is between 0.142 and 0.143. It's a problem with psx hardware based games, not just namcos12.c. Actual breakage in testing is r12680-r12687 - so near certainly r12684 is the culprit: "PlayStation GPU splits 4 point polygons into triangles. [smf]" more example pictures of the effect here: http://www.mametesters.org/view.php?id=4489 http://www.mametesters.org/view.php?id=4664
Github Commit

Flags
Regression Version	0.142u5
Affected Sets / Systems	all games with PlayStation GPU

Attached Files	tektagt0000.png (5,733 bytes) Sep 17, 2011, 00:58 Uploaded by hap
	tektagt_mame142_good.png (4,704 bytes) Sep 17, 2011, 01:08 Uploaded by hap
	ptblank2_0020.png (43,498 bytes) Sep 17, 2011, 01:08 Uploaded by hap
	ptblank2_0045.png (47,589 bytes) Sep 17, 2011, 01:09 Uploaded by hap

No.07896 hap Developer Nov 25, 2011, 21:36	looks like a rounding error at the lines with: n_var = somethingsomething [b]/ n_distance[/b]
No.09262 hap Developer Jan 20, 2013, 18:48	smf reverted r12684