04175: astdelux: Game slowndown when artwork is used with directdraw

ID	Category [?]	Severity [?]	Reproducibility	Date Submitted	Last Update
04175	Speed	Major	Always	Jan 7, 2011, 12:56	Jan 7, 2011, 19:20

Tester	haynor666	View Status	Public	Platform	MAME (Official Binary)
Assigned To		Resolution	Duplicate	OS	Windows XP (32-bit)
Status [?]	Closed			Driver	atari/asteroid.cpp
Version	0.141	Fixed in Version		Build	I686
		Fixed in Git Commit		Github Pull Request #

Summary	04175: astdelux: Game slowndown when artwork is used with directdraw
Description	When you are using artwork (backdrop) with directdraw game is very low. Without artwork everything is fine. Also if you switch to direct3D game works well with artwork.
Steps To Reproduce	Start game with and without artwork. Start game with artwork first in directdraw (no hardware stretching) then with Direct3D.
Additional Information
Github Commit

Flags
Regression Version
Affected Sets / Systems	astdelux

Attached Files

No.07025 Tafoid Administrator Jan 7, 2011, 14:39 edited on: Jan 7, 2011, 14:43	Direct Draw has always required more processor speed to display artwork than Direct 3D. The slowdown is expected when using any external artwork files - especially with Direct Draw. If I remember correctly, Direct Draw redraws the whole artwork every frame in software so is much slower than Direct 3D which uses overlay functions of your video card to display the artwork (much faster than software). Over time, the behavior has been pretty consistent. I don't see the issue as there has not been a regression. E:\DesktopF\MAME>mame115 astdelux -artpath e:\emulator\arcade\mame\artwork -nothrottle -video ddraw -str 6 Average speed: 30.07% (5 seconds) E:\DesktopF\MAME>mame120 astdelux -artpath e:\emulator\arcade\mame\artwork -nothrottle -video ddraw -str 6 Average speed: 31.06% (5 seconds) E:\DesktopF\MAME>mame125 astdelux -artpath e:\emulator\arcade\mame\artwork -nothrottle -video ddraw -str 6 Average speed: 30.89% (5 seconds). E:\DesktopF\MAME>mame130 astdelux -artpath e:\emulator\arcade\mame\artwork -nothrottle -video ddraw -str 6 Average speed: 30.63% (5 seconds) E:\DesktopF\MAME>mame135 astdelux -artpath e:\emulator\arcade\mame\artwork -nothrottle -video ddraw -str 6 Average speed: 30.80% (5 seconds) E:\DesktopF\MAME>mame140 astdelux -artpath e:\emulator\arcade\mame\artwork -nothrottle -video ddraw -str 6 Average speed: 29.77% (5 seconds) and current 0.141: E:\emulator\arcade\mame>mame astdelux -artpath e:\emulator\arcade\mame\artwork - nothrottle -video ddraw -str 6 Average speed: 30.29% (5 seconds)
No.07026 haynor666 Tester Jan 7, 2011, 15:24	OK, it seems all vector games have this issue. BTW. With throttle off, no frame skipping game runs at 900 % of speed so my processor is sufficient for this so this is not about power.
No.07027 Fujix Administrator Jan 7, 2011, 18:23	Yes heynor, it is strange. If I use -mt and ddraw, speed throttling becomes out of control. It works at 58% with a speed throttle and no skip, but if I disable throttling, it works at more than 1000%. In -nomt mode, it works normally, no skip is at 58%, 10-frame skip is at 280%.
No.07030 Fujix Administrator Jan 7, 2011, 19:18	I made new entry 04176 for the throttle issue by mistake. I set your credit there. Let me close this for duplicate, thank you.