Hollywood forums

Posted: **Sat Mar 26, 2011 4:46 pm**

Hi there!
As described on the topic:

viewtopic.php?f=10&t=219

I tryed to port on hollywood the DarkBasic/PortablE example:

http://cshandley.co.uk/portable/examples/index.html#ex5

I get some weird speed and fluidity problems under AmigaOS4/Pegasos2 with my test...
I tryed the Hollywood test I do under AmigaOS4 and get the problems described above than I tryed compiling the same program for MOS and it works fine(also tryed the OS4 one with os4emu and works fine too) so...
Why under AmigaOS4 natively I get that weirdness? maybe there was some AmigaOS problems, but why the PortablE exe works fine? Seems that PortablE and Hollywood approach at system differently but in that case PortablE approach well...

Any idea?
Maybe Andreas can tell us something?

Thank you!

PS under AmigaOS seems like if the timing routines have some timing problem not so much a speed problem but much like a problem that cause the program to refresh not always at same time...

PPS I tryed also to run the test with the -usewpa argument but was really slower in that way...and however wasnt constant neither in that way the scroll speed...

Posted: **Tue Mar 29, 2011 6:20 pm**

I need a very small example script that demonstrates the issue

Posted: **Wed Mar 30, 2011 12:48 am**

Here 3 examples, or better same example modified for 3 questions:

Example 1:

Code: Select all

x, y, z = 0, 0, 0

CreateBrush(1, 64, 64, $FF0000)

SelectBrush(1)
	SetFillStyle(#FILLCOLOR)
	Polygon(0, 0, {0, 64, 32, 0, 64, 64}, 3 , $00FF00)
EndSelect()

;SetBrushTransparency(1, $FF0000)

BeginDoubleBuffer()

Function p_Scroll()
	For LOCAL i = 0 TO 10
		DisplayBrush(1, 640 - (i * 63) - x, 150)
	Next

	For LOCAL i = 0 TO 10
		DisplayBrush(1, 640 - (i * 63) - y, 214)
	Next

	For LOCAL i = 0 TO 10
		DisplayBrush(1, 640 - (i * 63) - z, 278)
	Next

	Flip()
	
	x = x + 1
	y = y + 2
	z = z + 3
	
IF x = 64 THEN x = 0
IF y = 64 THEN y = 0
IF z >= 64 THEN z = 0

EndFunction

EscapeQuit(TRUE)

Scroll	= SetInterval(Nil, p_Scroll, 1000/50)

Repeat
	WaitEvent
Forever

That's standard scrolling example with standard timing Repeat/WaitEvent/Forever loop...
Running that especially on OS4 gave me scattered scroll(on MOS was better but also here not perfect)...

[EXTRA QUESTION]
Why the:

;SetBrushTransparency(1, $FF0000)

line give me problems if uncommented? seems to conflict with DoubleBuffering but wasnt the BGpic...or yes?
[/EXTRA QUESTION]

Example 2:

Code: Select all

x, y, z = 0, 0, 0

CreateBrush(1, 64, 64, $FF0000)

SelectBrush(1)
	SetFillStyle(#FILLCOLOR)
	Polygon(0, 0, {0, 64, 32, 0, 64, 64}, 3 , $00FF00)
EndSelect()

BeginDoubleBuffer()

Function p_Scroll()
	For LOCAL i = 0 TO 10
		DisplayBrush(1, 640 - (i * 63) - x, 150)
	Next

	For LOCAL i = 0 TO 10
		DisplayBrush(1, 640 - (i * 63) - y, 214)
	Next

	For LOCAL i = 0 TO 10
		DisplayBrush(1, 640 - (i * 63) - z, 278)
	Next

	Flip()
	
	x = x + 1
	y = y + 2
	z = z + 3
	
IF x = 64 THEN x = 0
IF y = 64 THEN y = 0
IF z >= 64 THEN z = 0

EndFunction

EscapeQuit(TRUE)

Repeat
	p_Scroll()
Forever

Here I try to get 100% cpu time but cant...
I get only a bit more cpu usage than on timing example but not so much(about 75% against about 65% on OS4 and MOS too) and the scroll speed too wasnt so bigger than on ex1...
Why?

Example3:

Code: Select all

x, y, z = 0, 0, 0

CreateBrush(1, 64, 64, $FF0000)

SelectBrush(1)
	SetFillStyle(#FILLCOLOR)
	Polygon(0, 0, {0, 64, 32, 0, 64, 64}, 3 , $00FF00)
EndSelect()

;BeginDoubleBuffer()

Function p_Scroll()
	For LOCAL i = 0 TO 10
		DisplayBrush(1, 640 - (i * 63) - x, 150)
	Next

	For LOCAL i = 0 TO 10
		DisplayBrush(1, 640 - (i * 63) - y, 214)
	Next

	For LOCAL i = 0 TO 10
		DisplayBrush(1, 640 - (i * 63) - z, 278)
	Next

;	Flip()
	
	x = x + 1
	y = y + 2
	z = z + 3
	
IF x = 64 THEN x = 0
IF y = 64 THEN y = 0
IF z >= 64 THEN z = 0

EndFunction

EscapeQuit(TRUE)

Repeat
	p_Scroll()
Forever

Finall yhere I get 100% cpu time usage and fast scroll...
Naturally here I dont have DoubleBuffering so no really usefull but just to reach 100% cpu usage...

That's all...
Hope that you can explain me why so weird things, also because semms to me tht the scroll issues was due a weird timing like if the time measured wasnt always the same so it scatter...

See you and sorry if made stupid questions...

Posted: **Wed Mar 30, 2011 7:26 pm**

Normaly if we use double buffer, the programm is speeder!!!!

Posted: **Wed Mar 30, 2011 8:02 pm**

Have you tried the above examples?

In what program type was speeder?

Posted: **Thu Mar 31, 2011 7:04 am**

YEs, The 3rd exemple is the faster...

Posted: **Fri Apr 01, 2011 11:17 pm**

did you get also the scattering problems?

Posted: **Sat Apr 02, 2011 12:33 pm**

I can confirm the scattering problems. I'll try to optimize the double buffered drawing routines for the next version.

Posted: **Sat Apr 02, 2011 1:20 pm**

Very good news for the next version..
But meantime no possibility to made decent orizontal shooter than...

Well..I've really much work to do on LoView and few time so no prob but...any ETA for the next version?

GOOD WORK!

EDIT: the DB routine uses already the hw acceleration on AmigaOSes? I forgot

EDIT2: The SetBrushTransparency problem was also due to the DB routines or my fault?

Posted: **Sat Apr 02, 2011 3:02 pm**

Whoops

Forgot the EDIT2 question was my stupid fault... sorry

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