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how to disable scaling
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poweredjj



Joined: 19 May 2017
Posts: 4
how to disable scaling 

Hello, this is my first post in this forum Very Happy.

I have a problem with Wii version of Scummvm. When using 240p unfiltered "double strike" mode on a crt, there is always some scaling enabled. How should I precisely set the horizontal and vertical underscan to disable scaling at all and get 1:1 pixel mapping?
Right now I always end up with more or less line doubling / line cutting - which looks terrible and defeats the whole purpose of playing on a crt television.
Is there any "secret" setting or maybe an exact underscan value?

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Post Sat May 20, 2017 9:54 am 
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Rikcahrd



Joined: 04 Jul 2009
Posts: 10
 

What are your exact graphics settings in scummvm and in the ini file.
Just to be clear, you are getting scanlines with less flicker but the output is being scaled and fuzzier.

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Post Tue May 30, 2017 3:23 pm 
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poweredjj



Joined: 19 May 2017
Posts: 4
 

I'm using version 1.9.0.

Options:
graphics mode: double-strike
render mode: <default> (changing this doesn't help)
aspect ratio correction on (changing to off gives me squashed picture)
fullscreen mode on
horizontal and vertical underscan at default (changing to minimum or maximum doesn't help)

Double strike mode starts correctly - I'm getting low res picture with visible scanlines.

The image should look like this - every pixel is displayed once.
PC version of Scummvm displays it correctly at "1x" setting.
No duplication, no line cutting:


Instead, it looks like one of the following cases.

With underscan set to higher values, some lines are duplicated:



With underscan set to lower values, some lines are cut:


Default underscan setting (slider at the middle) gives me some line duplication - it is no equivalent of "no scaling" option.

Setting the graphics mode to "double strike - filtered" eliminates line doubling / cutting, but the whole picture is blurry - it looks completely different than the pixel perfect artwork designed for low res tv screens.

My ini file looks like this:


quote:
[scummvm]
mute=false
speech_volume=192
native_mt32=false
mt32_device=null
midi_gain=100
talkspeed=60
gfx_mode=ds
subtitles=false
multi_midi=false
fullscreen=true
gui_browser_show_hidden=false
render_mode=hercAmber
browser_lastpath=sd:/apps/scummvm/games
gm_device=null
sfx_volume=192
music_volume=192
speech_mute=false
lastselectedgame=gob3-us
music_driver=auto
opl_driver=auto
aspect_ratio=true
versioninfo=1.9.0
autosave_period=300
gui_language=C
enable_gs=false

[plugin_files]
gob=plugins/gob.plg

[gob3-us]
description=Goblins Quest 3 (DOS/English (US))
path=sd:/apps/scummvm/games/goblins 3
gameid=gob
language=us
platform=pc
guioptions=sndNoSubs sndNoSpeech launchNoLoad lang_English (US)

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Post Wed May 31, 2017 3:43 pm 
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Rikcahrd



Joined: 04 Jul 2009
Posts: 10
 

Originally posted by AReim1982
Update!
->

http://www.mediafire.com/file/y01mvf9yadu9bq9/scummvm-1.9.0-wii-b3.zip

News:
- updated toolchain: devkitPPC R28 + LibOGC 1.8.16 + LibFAT 1.1.0
- updated libraries: Freetype 2.7, Jpeg 9B, LibPNG 1.5.28, ZLib 1.2.11, FLAC 1.2.1, LibMAD 0.15.1b, Tremor
- support for Z-Vision engine (Zork Nemesis, Zork Grand Inquisitor)

------------------------------------------------------

Download the above version and try it again. The nightly and and 1.9 versions from the bot are still using very old (2012) versions of the libraries. The above version by AReim1982 is updated with the latest versions.

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Post Mon Jun 05, 2017 12:27 am 
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poweredjj



Joined: 19 May 2017
Posts: 4
 

I've tested this version, trying to change aspect ratio, full screen, screen mode...
The problem is identical to the previous version - no improvement.
There is always some horizontal and vertical scaling.

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Post Mon Jun 05, 2017 2:43 pm 
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