Antialiasing cannot be disabled

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Put antialias=no in mame.cfg
2. Run a lo-res game (e.g. Pengo)

What is the expected output? What do you see instead?

I expect no antialiasing, but it is still there.

What version of the product are you using? On what operating system?

2013-02-09-wheezy-raspbian.zip and mame4all from store.raspberrypi.com 
(2013-05-08 version)

Original issue reported on code.google.com by hans.hue...@gmail.com on 14 May 2013 at 10:10

[GoogleCodeExporter]

The options in the default Pi mame.cfg are the only ones supported, you can't 
add additional ones from the official MAME program as it's not coded that way, 
it's specific to the Raspberry Pi. 

To remove antialiasing means rewriting the graphics backend as it currently 
uses the low level graphics hardware API for performance.  I may try and have a 
look at this in future but any sort of software scaling is going to affect the 
performance on the Pi badly as it's very CPU limited, unlike a PC.

Original comment by squid...@gmail.com on 15 May 2013 at 2:48

[GoogleCodeExporter]

I had not hoped for software scaling except for maybe scan doubling, but
rather for non-antialiased output.  I would then want to chose the display
resolution so that it matches the game resolution and use the scaler inside
of the TFT display.  But I don't know anything about how the low-level
graphics output works, so if you say that my naive wish cannot easily be
granted, please feel free to close the issue and please ignore my ignorance.

Thanks for your reply!
-Hans

Original comment by hans.hue...@gmail.com on 15 May 2013 at 4:14

[GoogleCodeExporter]

It's OK. I'll leave it open as I might be able to produce a solution sometime 
in the future.

Original comment by squid...@gmail.com on 15 May 2013 at 4:44

• Changed state: Accepted

[GoogleCodeExporter]

Would be great to have the non-antialised option and disable any kind of 
postprocessing.

Original comment by luishern...@gmail.com on 20 May 2013 at 8:41

[GoogleCodeExporter]

[deleted comment]

[GoogleCodeExporter]

There's currently no postprocessing going on, the GPU is simply scaling to the 
size of the screen. Using "stretch_display=no" switches off any scaling. You 
can then change the monitor/TV resolution using /usr/bin/tvservice. The Pi's 
scaling quality is more than likely better quality than your Monitor's. 

Original comment by squid...@gmail.com on 22 May 2013 at 3:36

[GoogleCodeExporter]

Implemented in the latest version. "display_smooth_stretch" option.

Original comment by squid...@gmail.com on 8 Jun 2013 at 11:12

• Changed state: Fixed

[GoogleCodeExporter]

You are awesome, thank you so much.  The games I'm interested in look
crystal clear now!

Original comment by hans.hue...@gmail.com on 8 Jun 2013 at 8:01